Plasma corticosterone 1 hr post 4/g/kg EtOH [µg/dl] The genetic control over the corticosterone response to ethanol (EtOH) and its possible relationship to other EtOH-related traits was examined using BXD recombinant inbred (RI) strains derived from an F2 cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. Quantitative trait locus (QTL) analysis of corticosterone levels 1 hr following EtOH suggested the influence of a single major gene on this trait. Two loci were predicted to account for 47% of the genetic variance in plasma corticosterone levels 6 hr following EtOH, whereas 3 loci were predicted to account for 78% of the genetic variance in corticosterone levels 7 hr following EtOH. Markers associated with corticosterone levels 7 hr following EtOH and corrected corticosterone levels 6 hr post-EtOH overlapped with ones found to influence acute and chronic EtOH withdrawal severity, suggesting some degree of common genetic determination between these traits. Overall these results indicate that gene action significantly influences stress responsiveness and suggest possible chromosomal locations of these genes. Roberts AJ, Phillips TJ, Belknap JK, Finn DA, Keith LD. Genetic analysis of the corticosterone response to ethanol in BXD recombinant inbred mice Behav Neurosci 109(6) 1199-1208 Dec 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8748968&dopt=Abstract 8748968 96350725 01 65-115 days 65 115 Male 5-15 µg/dl 16.21 1.63 20.29 3.02 17.42 1.67 16.89 2.14 22.63 3.22 12.53 2.86 13.97 1.86 28.12 2.81 24.68 2.55 17.17 1.91 23.09 1.42 16.11 2.53 27.64 2.69 20.39 4.06 16.41 2.49 20.13 1.91 22.82 3.16 15.07 4.75 24.24 3.18 24.03 2.00 16.34 2.04 12/26/2002 ETCORT4(1H) ETCORT1 EtOH 4g/kg JKB/AR p. 1202, Fig 1 MRG 020402 with JKB by publication 8748968.01 Plasma corticosterone 1 hr post saline [µg/dl] The genetic control over the corticosterone response to ethanol (EtOH) and its possible relationship to other EtOH-related traits was examined using BXD recombinant inbred (RI) strains derived from an F2 cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. Quantitative trait locus (QTL) analysis of corticosterone levels 1 hr following EtOH suggested the influence of a single major gene on this trait. Two loci were predicted to account for 47% of the genetic variance in plasma corticosterone levels 6 hr following EtOH, whereas 3 loci were predicted to account for 78% of the genetic variance in corticosterone levels 7 hr following EtOH. Markers associated with corticosterone levels 7 hr following EtOH and corrected corticosterone levels 6 hr post-EtOH overlapped with ones found to influence acute and chronic EtOH withdrawal severity, suggesting some degree of common genetic determination between these traits. Overall these results indicate that gene action significantly influences stress responsiveness and suggest possible chromosomal locations of these genes. Roberts AJ, Phillips TJ, Belknap JK, Finn DA, Keith LD. Genetic analysis of the corticosterone response to ethanol in BXD recombinant inbred mice Behav Neurosci 109(6) 1199-1208 Dec 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8748968&dopt=Abstract 8748968 96350725 03 65-115 days 65 115 Male 3-9 µg/dl 4.36 0.64 4.07 1.71 4.35 2.00 8.28 3.78 3.99 1.03 8.59 4.62 15.19 5.56 5.07 0.89 5.64 1.90 2.47 0.64 6.14 1.14 6.04 2.67 7.54 3.74 1.09 0.37 5.66 2.71 4.22 0.69 6.95 1.58 11.34 8.21 11.86 9.09 7.77 2.66 2.88 0.53 12/26/2002 SALCORT (1H) SALCORT1 Saline JKB/AR p. 1202, Fig 1 MRG 020402 with JKB by publication 8748968.03 Plasma corticosterone 6 hr post ETOH Male [µg/dl] [Plasma corticosterone 6 hours post 4/g/kg EtOH (Male), Unpublished means from same series of studies as reported in: Roberts, Phillips, Belknap, Finn, Keith 1995, Behavioral Neurosci 109:1199-1208] The genetic control over the corticosterone response to ethanol (EtOH) and its possible relationship to other EtOH-related traits was examined using BXD recombinant inbred (RI) strains derived from an F2 cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. Quantitative trait locus (QTL) analysis of corticosterone levels 1 hr following EtOH suggested the influence of a single major gene on this trait. Two loci were predicted to account for 47% of the genetic variance in plasma corticosterone levels 6 hr following EtOH, whereas 3 loci were predicted to account for 78% of the genetic variance in corticosterone levels 7 hr following EtOH. Markers associated with corticosterone levels 7 hr following EtOH and corrected corticosterone levels 6 hr post-EtOH overlapped with ones found to influence acute and chronic EtOH withdrawal severity, suggesting some degree of common genetic determination between these traits. Overall these results indicate that gene action significantly influences stress responsiveness and suggest possible chromosomal locations of these genes. Roberts AJ, Phillips TJ, Belknap JK, Finn DA, Keith LD. Genetic analysis of the corticosterone response to ethanol in BXD recombinant inbred mice Behav Neurosci 109(6) 1199-1208 Dec 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8748968&dopt=Abstract 8748968 96350725 99 65-115 days 65 115 Male µg/dl 16.4 15.3 13.9 4.5 4.7 21.9 17.7 16.5 17.7 15.3 20 13.3 12.8 16.1 14.8 8.6 21.5 16.3 11.8 18.1 9.5 15.7 12/27/2002 SALCORT(6H) ETCORT6 EtOH 4g/kg JKB/AR MRG 020402 with JKB 8748968.99 Plasma corticosterone 6 hr post EtOH Female [µg/dl] [Plasma corticosterone 6 hours post 4/g/kg EtOH (Female) Unpublished means from same series of studies as reported in: Roberts, Phillips, Belknap, Finn, Keith 1995, Behavioral Neurosci 109:1199-1208] The genetic control over the corticosterone response to ethanol (EtOH) and its possible relationship to other EtOH-related traits was examined using BXD recombinant inbred (RI) strains derived from an F2 cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. Quantitative trait locus (QTL) analysis of corticosterone levels 1 hr following EtOH suggested the influence of a single major gene on this trait. Two loci were predicted to account for 47% of the genetic variance in plasma corticosterone levels 6 hr following EtOH, whereas 3 loci were predicted to account for 78% of the genetic variance in corticosterone levels 7 hr following EtOH. Markers associated with corticosterone levels 7 hr following EtOH and corrected corticosterone levels 6 hr post-EtOH overlapped with ones found to influence acute and chronic EtOH withdrawal severity, suggesting some degree of common genetic determination between these traits. Overall these results indicate that gene action significantly influences stress responsiveness and suggest possible chromosomal locations of these genes. Roberts AJ, Phillips TJ, Belknap JK, Finn DA, Keith LD. Genetic analysis of the corticosterone response to ethanol in BXD recombinant inbred mice Behav Neurosci 109(6) 1199-1208 Dec 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8748968&dopt=Abstract 8748968 96350725 98 65-115 days 65 115 Female µg/dl 5 9 4 9 14 8 4 10 5 22 18 12 17 7 20 13 13 9 16 12 8 21 16 12 18 10 16 12/27/2002 SALCORT(6HF) ETCORT6F EtOH 4g/kg JKB/AR MRG 020402 with JKB 8748968.98 Audiogenic seizure-mean severity score in response to pure tone [severity of seizure] The difference in susceptibility to audiogenic seizures (AGS) between C57BL/6J and DBA/2J inbred strains of mice is due to multiple genetic factors. AGS susceptibility was tested in 21-day-old mice from classical crosses, BXD recombinant inbred (RI) strains, a congenic DBA/2N.B6N-Ahb inbred strain and crosses between the BXD RI strains and DBA/2J. Analysis of these data reveals that the variation in AGS susceptibility between these two strains results from allelic differences at three or more loci. Most of the variation is due to allelic differences at two loci. The first, Asp-1 (formerly Ias), is a major gene located on chromosome 12, between Ah and D12 Nyul. The second, Asp-2 (formerly asp), is a minor gene located on chromosome 4, tightly linked to b. The negative correlation of brain stem Ca2(+)-ATPase activity and AGS susceptibility in the BXD RI strains suggests that the strain difference in Ca2(+)-ATPase activity is inherited as a polygenic trait and that Asp-1 and Asp-2 are linked to, or identical to, factors that influence Ca2(+)-ATPase activity. Neumann PE, Seyfried TN. Mapping of two genes that influence susceptibility to audiogenic seizures in crosses of C57BL/6J and DBA/2J mice Behav Genet 20(2) 307-323 Mar 1990 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2141254&dopt=Abstract 2141254 01 20-22 days 20 22 MF 10-63 Severity of seizure; 0=no response, 1=wild running, 2=clonic or tonic seizure 0.07 1.88 0.2 1.92 1.64 0.14 0.57 1.85 1.04 0.3 0.1 0.33 1.94 0.21 0.07 0.73 1.92 1.16 1.09 0.36 1.29 1 0.09 0 1.89 6/23/2003 MK Sullivan MK Sullivan AGS AGS 60 sec exposure to pure tone 11KHx at 120db JKB p. 311, Table 1 MRG 120601 from publication 2141254.01 Morphine hypothermia DRC slope Belknap JK, Crabbe JC. Chromosome mapping of gene loci affecting morphine and amphetamine responses in BXD recombinant inbred mice Ann NY Acad Sci 654 311-323 Jun 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1632590&dopt=Abstract 1632590 01 Male -4.58 -7.01 -7.06 -5.75 -6.33 -4.88 -7.36 -2.93 -2.02 -3.43 -3.75 -1.88 -1.31 -4.53 -2.73 -2.12 -5.29 -3.54 -6.06 -5.82 -7.5 -6.06 -7.65 12/20/2002 MORTEMP BDTEMP30 Morphine Dose response across 8, 16, or 32 mg/kg i.p. JKB p. 319, Fig 3 MRG 011002; prior confirmation by JKB with data and publication 1632590.01 Morphine analgesia DRC slope Belknap JK, Crabbe JC. Chromosome mapping of gene loci affecting morphine and amphetamine responses in BXD recombinant inbred mice Ann NY Acad Sci 654 311-323 Jun 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1632590&dopt=Abstract 1632590 02 Male 26.8 59.7 50.1 63.4 30 30.5 62.7 27.6 33.9 25.8 31.2 25.5 36.7 39.1 15.2 10.9 44.3 59.8 35.4 46.3 34.7 24.3 42.9 12/20/2002 MORHPL8 HOTPLATE Morphine Dose response across 8, 16, or 32 mg/kg i.p. JKB p. 319, Fig 3 MRG 011002; prior confirmation by JKB with data and publication 1632590.02 Straub tail Morphine DRC slope Belknap JK, Crabbe JC. Chromosome mapping of gene loci affecting morphine and amphetamine responses in BXD recombinant inbred mice Ann NY Acad Sci 654 311-323 Jun 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1632590&dopt=Abstract 1632590 03 Male 0.94 0.25 1.37 1.04 1.07 0.94 0.42 0.75 0.81 0.94 1.37 0.91 0.73 0.98 0.48 0.61 1.2 0.35 0.75 1.16 1.24 0.75 0.78 12/20/2002 MORSTRAUB STRAUB30 Morphine Dose response across 8, 16, or 32 mg/kg i.p. JKB p. 319, Fig 3 MRG 011002; prior confirmation by JKB with data and publication 1632590.03 Saline body temp, degree C Belknap JK, Crabbe JC. Chromosome mapping of gene loci affecting morphine and amphetamine responses in BXD recombinant inbred mice Ann NY Acad Sci 654 311-323 Jun 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1632590&dopt=Abstract 1632590 04 Male degrees celsius 37.5 37.7 38.1 37 37.2 38.3 37.4 37.3 38.4 37.8 37.6 36.6 37 38.4 36.8 37.3 37.5 37.5 37.9 38.5 37.8 38.8 38.2 12/20/2002 SALTEMP SAL_BTMP Saline JKB MRG 011002; prior confirmation by JKB with data and publication 1632590.04 Saline hot plate latency, seconds Belknap JK, Crabbe JC. Chromosome mapping of gene loci affecting morphine and amphetamine responses in BXD recombinant inbred mice Ann NY Acad Sci 654 311-323 Jun 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1632590&dopt=Abstract 1632590 05 Male seconds 20.2 21.3 22 19.5 11.8 8.8 31 18 14.1 11.6 12.8 13 11.9 20 13.8 16.1 12.2 13.5 15 15.5 22.9 9.8 19.1 12/20/2002 SALHP8 SAL_HOTP Saline JKB MRG 011002; prior confirmation by JKB with data and publication 1632590.05 Saline elevated open field activity, [Unpublished means from same series of studies as reported in: Belknap & Crabbe, 1992 ANYAS 654:311-323] Belknap JK, Crabbe JC. Chromosome mapping of gene loci affecting morphine and amphetamine responses in BXD recombinant inbred mice Ann NY Acad Sci 654 311-323 Jun 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1632590&dopt=Abstract 1632590 06 Male 15.44 6.39 9.34 12.15 9.24 15.25 8.4 8.675 14.49 6.43 11.84 7.315 10.25 12.72 7.95 8.3 5.925 6.945 8.26 8.58 5.25 12 12/20/2002 SALACT(EOF) SALACT Saline JKB MRG 020402 with JKB 1632590.06 Baseline handling induced convulsions (HIC) Recombinant inbred (RI) mouse strains were developed primarily as a tool to detect and provisionally map major gene loci--those with effects large enough to cause a bimodal distribution in the trait of interest. This implied that progress toward gene mapping was possible only for gene loci accounting for at least half of the genetic variance. More recently, QTL (quantitative trait loci) approaches have been advanced that do not require bimodal distributions and are thus applicable to a much wider range of phenotypes. They offer the prospect of meaningful progress toward detecting and mapping minor as well as major gene loci affecting any trait of interest, provided there is a significant degree of genetic determination among the RI strains. This paper presents a review of RI gene mapping efforts concerning phenotypes related to drug abuse and presents new data for studies now in progress for nitrous oxide and acute ethanol withdrawal intensity. These two studies exemplify several strengths and limitations of the RI QTL approach. Belknap JK, Metten P, Helms ML, O'Toole LA, Angeli-Gade S, Crabbe JC, Phillips TJ. Quantitative trait loci (QTL) applications to substances of abuse: physical dependence studies with nitrous oxide and ethanol in BXD mice Behav Genet 23(2) 213-222 Mar 1993 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8512534&dopt=Abstract 8512534 01 100 days Male 0.6995 0.3415 1.6835 2.0565 1.17045 0.3985 1.146 1.8895 0.6495 1.581 1.928 0.1625 0.4835 0.4165 0.7105 0.6315 0.091 0.125 1.5725 0.625 0.0985 12/20/2002 BASEHIC AVGAVB JKB MRG 011002; prior confirmation by JKB with data and publication 8512534.01 Nitrous oxide withdrawal handling induced convulsion (HIC) area under curve Recombinant inbred (RI) mouse strains were developed primarily as a tool to detect and provisionally map major gene loci--those with effects large enough to cause a bimodal distribution in the trait of interest. This implied that progress toward gene mapping was possible only for gene loci accounting for at least half of the genetic variance. More recently, QTL (quantitative trait loci) approaches have been advanced that do not require bimodal distributions and are thus applicable to a much wider range of phenotypes. They offer the prospect of meaningful progress toward detecting and mapping minor as well as major gene loci affecting any trait of interest, provided there is a significant degree of genetic determination among the RI strains. This paper presents a review of RI gene mapping efforts concerning phenotypes related to drug abuse and presents new data for studies now in progress for nitrous oxide and acute ethanol withdrawal intensity. These two studies exemplify several strengths and limitations of the RI QTL approach. Belknap JK, Metten P, Helms ML, O'Toole LA, Angeli-Gade S, Crabbe JC, Phillips TJ. Quantitative trait loci (QTL) applications to substances of abuse: physical dependence studies with nitrous oxide and ethanol in BXD mice Behav Genet 23(2) 213-222 Mar 1993 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8512534&dopt=Abstract 8512534 02 100 days Male 5.68 13.24 6.85 1.17 15.6 4.57 5.35 20 2.2 10.15 2.55 1 1.33 3.8 8.87 3.36 6.5 6.67 9 6.94 5.62 12/20/2002 N2OHIC(AUC) NCOAUC Nitrous Oxide gas 75% JKB MRG 011002; prior confirmation by JKB with data and publication 8512534.02 Corrected peak for nitrous oxide withdrawal handling induced convulsions HIC Recombinant inbred (RI) mouse strains were developed primarily as a tool to detect and provisionally map major gene loci--those with effects large enough to cause a bimodal distribution in the trait of interest. This implied that progress toward gene mapping was possible only for gene loci accounting for at least half of the genetic variance. More recently, QTL (quantitative trait loci) approaches have been advanced that do not require bimodal distributions and are thus applicable to a much wider range of phenotypes. They offer the prospect of meaningful progress toward detecting and mapping minor as well as major gene loci affecting any trait of interest, provided there is a significant degree of genetic determination among the RI strains. This paper presents a review of RI gene mapping efforts concerning phenotypes related to drug abuse and presents new data for studies now in progress for nitrous oxide and acute ethanol withdrawal intensity. These two studies exemplify several strengths and limitations of the RI QTL approach. Belknap JK, Metten P, Helms ML, O'Toole LA, Angeli-Gade S, Crabbe JC, Phillips TJ. Quantitative trait loci (QTL) applications to substances of abuse: physical dependence studies with nitrous oxide and ethanol in BXD mice Behav Genet 23(2) 213-222 Mar 1993 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8512534&dopt=Abstract 8512534 03 100 days Male 1.4 0.19 2.94 0.20 1.41 0.25 0.44 0.11 3.4 0.35 1.28 0.27 1.31 0.19 4.17 0.23 0.62 0.19 2.2 0.22 0.88 0.24 0.3 0.13 0.39 0.09 0.73 0.11 2.09 0.36 0.79 0.22 1.71 0.32 1.56 0.28 2 0.31 1.35 0.29 1.35 0.30 12/20/2002 N2OHIC(PK) NCORPK2 Nitrous Oxide gas 75% JKB MRG 011002; prior confirmation by JKB with data and publication 8512534.03 Nitrous oxide withdrawal handling induced convulsions-difference from baseline (treated minus nontreated) Recombinant inbred (RI) mouse strains were developed primarily as a tool to detect and provisionally map major gene loci--those with effects large enough to cause a bimodal distribution in the trait of interest. This implied that progress toward gene mapping was possible only for gene loci accounting for at least half of the genetic variance. More recently, QTL (quantitative trait loci) approaches have been advanced that do not require bimodal distributions and are thus applicable to a much wider range of phenotypes. They offer the prospect of meaningful progress toward detecting and mapping minor as well as major gene loci affecting any trait of interest, provided there is a significant degree of genetic determination among the RI strains. This paper presents a review of RI gene mapping efforts concerning phenotypes related to drug abuse and presents new data for studies now in progress for nitrous oxide and acute ethanol withdrawal intensity. These two studies exemplify several strengths and limitations of the RI QTL approach. Belknap JK, Metten P, Helms ML, O'Toole LA, Angeli-Gade S, Crabbe JC, Phillips TJ. Quantitative trait loci (QTL) applications to substances of abuse: physical dependence studies with nitrous oxide and ethanol in BXD mice Behav Genet 23(2) 213-222 Mar 1993 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8512534&dopt=Abstract 8512534 04 100 days Male 6.06666666666667 12.635 9.53333333333333 0.333333333333333 14.13 4.25 7.81666666666667 15.977 0.806666666666667 8.35 2.47166666666667 0.55 1.04666666666667 3.55 9.33666666666667 4.24333333333333 6.72666666666667 6.44666666666667 7.21333333333333 9.13666666666667 5.57 12/20/2002 N2OHIC(DIFF) NDIFFAUC Nitrous Oxide gas 75% JKB MRG 011002; prior confirmation by JKB with data and publication 8512534.04 Acute ethanol withdrawal-difference from saline, [Unpublished means from same series of studies as reported in: Belknap, Metten, Helms, O'Toole, Angeli-Gade, Crabbe & Phillips, 1993 Behav Genetics 23:213-222] Recombinant inbred (RI) mouse strains were developed primarily as a tool to detect and provisionally map major gene loci--those with effects large enough to cause a bimodal distribution in the trait of interest. This implied that progress toward gene mapping was possible only for gene loci accounting for at least half of the genetic variance. More recently, QTL (quantitative trait loci) approaches have been advanced that do not require bimodal distributions and are thus applicable to a much wider range of phenotypes. They offer the prospect of meaningful progress toward detecting and mapping minor as well as major gene loci affecting any trait of interest, provided there is a significant degree of genetic determination among the RI strains. This paper presents a review of RI gene mapping efforts concerning phenotypes related to drug abuse and presents new data for studies now in progress for nitrous oxide and acute ethanol withdrawal intensity. These two studies exemplify several strengths and limitations of the RI QTL approach. Belknap JK, Metten P, Helms ML, O'Toole LA, Angeli-Gade S, Crabbe JC, Phillips TJ. Quantitative trait loci (QTL) applications to substances of abuse: physical dependence studies with nitrous oxide and ethanol in BXD mice Behav Genet 23(2) 213-222 Mar 1993 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8512534&dopt=Abstract 8512534 05 100 days Male 5.227 14.08 8.6 9.303 7.9 1.91 3.05 6.27 1.78 5.07 5.6 3.11 6.3 4.06 8.47 5.707 2.21 6.047 6.696 5.5 1.49 12/20/2002 ETHIC4(DIFF) DAUC412 EtOH 4 g/kg JKB MRG 020402 with JKB 8512534.05 Home cage activity after saline injection Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 01 10-14 wks 70 98 MF 8 13.25 8.375 11.75 8.625 10.75 15.5 11.25 11.375 8.375 7.88888888888889 6 10.75 8 11.875 10.5 12 7.5 11.375 15.75 1.77777777777778 17.125 11.5 7.5 13.5 9.125 8.625 20.75 6/4/2003 MK Sullivan SALACT(Home) ACT0 Saline Saline JKBQTL2 JKB p. 752, Fig 6 MRG 011002 with JKB by publication 8987796.01 Activity-difference from saline for 4 mg/kg methamphetamine [quadrant crossings/min] Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 02 10-14 wks 70 98 MF 8 quadrant crossings/min 21.625 2.35 18.7678571428571 4.74 47.25 6.70 35.9305555555556 4.39 41.5 7.43 19.25 8.96 7 5.83 33.125 5.26 8.5 2.54 31.8986111111111 3.39 19.875 3.30 13.125 2.96 35.75 6.70 18.125 8.87 21.875 6.26 31.5 6.26 34.375 4.30 9.5 4.74 10.125 5.52 13.8472222222222 4.17 15.5 7.17 22 6.13 25.5 5.39 33.75 4.65 10.375 5.65 30 4.09 14.75 4.09 6/4/2003 MK Sullivan MAACT4 DACT4 Meth 4 mg/kg JKB p. 748, Fig 2 MRG 011002 with JKB by publication 8987796.02 Activity-difference from saline for 8 mg/kg methamphetamine [quadrant crossings/min] Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 03 10-14 wks 70 98 MF 8 quadrant crossings/min 11.375 3.61 17 5.61 49.875 7.61 24.4861111111111 4.26 43.125 6.70 1.7 5.04 7.25 4.52 14.25 5.78 6.125 4.87 27.4861111111111 3.73 31.5 1.96 15.25 5.13 16.25 7.78 4.375 2.30 16.5 4.43 26.125 8.52 28.7857142857143 4.13 5.5 3.00 -0.875 3.30 25.3472222222222 5.57 9.375 4.17 40.625 7.65 11.5 4.83 12.125 5.57 23.4305555555556 8.96 37.375 4.78 7.375 3.13 6/4/2003 MK Sullivan MAACT8 DACT8 Meth 8 mg/kg JKB p. 748, Fig 2 MRG 011002 with JKB by publication 8987796.03 Activity-difference from saline for 16 mg/kg methamphetamine [quadrant crossings/min] Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 04 10-14 wks 70 98 MF 8 quadrant crossings/min -8.75 1.89 3.79166666666667 3.96 6.625 9.96 -0.874999999999998 2.39 8.25 4.89 -12.75 1.88 -9.13888888888889 1.14 -2 3.18 -5.75 1.89 -2.88888888888889 3.22 6.875 5.25 3.625 4.89 -7.14285714285714 0.86 -2 3.07 4.875 6.25 -6.85714285714286 1.61 -1.75 2.14 -4.125 3.64 -7.25 2.86 25.4444444444444 4.75 -13.3472222222222 1.64 8 6.75 -1.75 2.46 -7.7 1.57 11.25 3.86 4.25 2.71 -4.25 5.75 6/4/2003 MK Sullivan MAACT16 DACT16 Meth 16 mg/kg JKB p. 748, Fig 2 MRG 011002 with JKB by publication 8987796.04 Sterotyped chewing responses [N/min] Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 05 10-14 wks 70 98 MF 8 N/min 2.25 0.723 8.375 2.349 0 0.400 1.88888888888889 0.979 1.375 1.396 7.3 1.557 8.25 1.830 5.75 2.323 4.875 1.328 5.04166666666667 2.604 0.125 0.145 2.22222222222222 1.149 9.625 2.162 0.875 0.689 4.5 1.430 7.375 2.545 1.44642857142857 0.987 2.875 2.774 3.375 1.174 1.40277777777778 1.277 0 0.289 3.875 2.026 2.275 1.098 2.125 1.226 0.0833333333333333 0.289 2.125 2.145 -0.125 0.366 6/4/2003 MK Sullivan MACHEW8 DCHEW8 Meth 8 mg/kg JKB p. 748, Fig 3 MRG 011002 with JKB by publication 8987796.05 Change in body temp due to 4 mg/kg methamphetamine [degree C] Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 06 10-14 wks 70 98 MF 8 degree C 0.0124999999999957 0.186 -1.00357142857143 0.536 0.832142857142856 0.345 -0.461111111111116 0.299 0.237500000000004 0.206 -3.72499999999999 0.423 -2.05 0.747 0.424999999999997 0.500 0.0625 0.232 0.588888888888889 0.268 -0.18035714285714 0.232 -1.56250000000001 0.742 0.550000000000004 0.495 -1.2125 0.495 0.362499999999997 0.147 -0.137500000000003 0.711 -1.4375 0.232 -0.487499999999997 0.418 -1.8375 0.820 -1.35277777777779 0.340 -0.275000000000006 0.323 -0.737499999999997 0.325 -1.53750000000001 0.691 -0.537500000000001 0.742 -0.279166666666676 0.299 0.125 0.178 -0.76250000000001 0.289 6/4/2003 MK Sullivan MATEMP4 DTEMP4 Meth 4 mg/kg JKB p. 747, Fig 1 MRG 011002 with JKB by publication 8987796.06 Change in body temp due to 8 mg/kg methamphetamine [degree C] Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 07 10-14 wks 70 98 MF 8 degree C -0.337499999999991 0.254 -0.0875000000000057 0.207 1.3 0.236 0.294444444444444 0.406 0.674999999999997 0.196 -2.3 0.703 -0.762499999999996 0.283 1.1875 0.120 0.225000000000001 0.330 1.02638888888889 0.232 0.357142857142861 0.286 0.799999999999997 0.351 1.77500000000001 0.196 -1.1125 0.083 1.2375 0.402 0.424999999999997 0.283 0.253571428571433 0.428 0.0124999999999957 0.141 -0.63750000000001 0.630 -0.06527777777778 0.601 -0.125000000000007 0.457 0.525000000000006 0.312 -0.850000000000001 0.580 1.3 0.525 -1.26805555555557 0.359 0.824999999999996 0.170 -0.362500000000004 0.417 6/4/2003 MK Sullivan MATEMP8 DTEMP8 Meth 8 mg/kg JKB p. 747, Fig 1 MRG 011002 with JKB by publication 8987796.07 Change in body temp due to 16 mg/kg methamphetamine [degree C] Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 08 10-14 wks 70 98 MF 8 degree C 0.162500000000001 0.296 0.258333333333326 0.396 1.05 0.217 1.5375 0.316 1.09499999999999 0.316 -0.149999999999991 0.352 0.680555555555557 0.299 1.40000000000001 0.211 0.75 0.316 1.05138888888889 0.228 0.43214285714285 0.168 0.887499999999996 0.177 1.13035714285714 0.493 1.1875 0.524 1.2625 0.382 1.39821428571428 0.234 1.05 0.359 0.325000000000003 0.239 1.1375 0.274 0.377777777777773 0.353 0.791666666666664 0.217 0.725000000000001 0.328 1.2 0.504 2.3525 0.091 -0.100000000000009 0.202 1.2375 0.316 1.01249999999999 0.140 6/4/2003 MK Sullivan MATEMP16 DTEMP16 Meth 16 mg/kg JKB p. 747, Fig 1 MRG 011002 with JKB by publication 8987796.08 Morphine consumption-two bottle choice [morphine concentration 0.3 to 0.7 mg/ml] The use of Recombinant Inbred mouse Strains (RIS) to derive information about the complexity of the genetic architecture underlying various traits is increasing in popularity. Behaviors measured to index sensitivity to drug effects and vulnerability to drug abuse are considered here. Potential uses of RIS are identification of major gene effects, mapping of traits to particular chromosomal sites, determining genetic correlations between characters, and identifying behaviorally extreme genotypes. This approach has led to identification of a major gene moderating alcohol acceptance in mice and has revealed a more complex polygenic system influencing morphine consumption. Phillips TJ, Belknap JK, Crabbe JC. Use of recombinant inbred strains to assess vulnerability to drug abuse at the genetic level J Addict Dis 10(1-2) 73-87 1991 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2065120&dopt=Abstract 2065120 01 Male 157 16 16 42 84 50 27 27 97 29 23 148 16 17 19 96 19 99 52 71 49 97 12/20/2002 MORCONS MORCON Morphine mg/kg/day JKB p. 80, Table 1 MRG 020402 with JKB by publication 2065120.01 Quinine consumption-two bottle choice [quinine concentration 0.1 to 0.4 mg/ml] The use of Recombinant Inbred mouse Strains (RIS) to derive information about the complexity of the genetic architecture underlying various traits is increasing in popularity. Behaviors measured to index sensitivity to drug effects and vulnerability to drug abuse are considered here. Potential uses of RIS are identification of major gene effects, mapping of traits to particular chromosomal sites, determining genetic correlations between characters, and identifying behaviorally extreme genotypes. This approach has led to identification of a major gene moderating alcohol acceptance in mice and has revealed a more complex polygenic system influencing morphine consumption. Phillips TJ, Belknap JK, Crabbe JC. Use of recombinant inbred strains to assess vulnerability to drug abuse at the genetic level J Addict Dis 10(1-2) 73-87 1991 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2065120&dopt=Abstract 2065120 02 Male 36 24 32 12 135 20 13 10 11 17 17 62 5 27 11 9 19 58 85 25 39 88 12/20/2002 QUINCONS QUINCON Quinine mg/kg/day JKB p. 80, Table 1 MRG 020402 with JKB by publication 2065120.02 Saccharin preference Saccharin preference - mean of 2 studies;Unpublished means from same series of studies as reported in: 1) Phillips, Belknap, Crabbe 1991, J Addictive Diseases 10:73-87; 2) Belknap, Metten, Helms, O'toole, Angeli-Gade, Crabbe & Phillips, 1993 Behav Genetics 23:213-222 The use of Recombinant Inbred mouse Strains (RIS) to derive information about the complexity of the genetic architecture underlying various traits is increasing in popularity. Behaviors measured to index sensitivity to drug effects and vulnerability to drug abuse are considered here. Potential uses of RIS are identification of major gene effects, mapping of traits to particular chromosomal sites, determining genetic correlations between characters, and identifying behaviorally extreme genotypes. This approach has led to identification of a major gene moderating alcohol acceptance in mice and has revealed a more complex polygenic system influencing morphine consumption. Phillips TJ, Belknap JK, Crabbe JC. Use of recombinant inbred strains to assess vulnerability to drug abuse at the genetic level J Addict Dis 10(1-2) 73-87 1991 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2065120&dopt=Abstract 2065120 97 Male 0.95 0.715 0.79 0.765 0.915 0.9 0.715 0.695 0.765 0.6675 0.805 0.86 0.77 0.765 0.615 0.641 0.84 0.8965 0.717 0.7255 0.873 0.79 12/19/2002 SACCPREF SACCPREF Saccharin preference ratio JKB MRG 020402 with JKB 2065120.97 Saccharin consumption Saccharin consumption - mean of 2 studies Unpublished means from same series of studies as reported in: 1) Phillips, Belknap, Crabbe 1991, J Addictive Diseases 10:73-87; 2) Belknap, Metten, Helms, O'Toole, Angeli-Gade, Crabbe & Phillips, 1993 Behav Genetics 23:213-222 The use of Recombinant Inbred mouse Strains (RIS) to derive information about the complexity of the genetic architecture underlying various traits is increasing in popularity. Behaviors measured to index sensitivity to drug effects and vulnerability to drug abuse are considered here. Potential uses of RIS are identification of major gene effects, mapping of traits to particular chromosomal sites, determining genetic correlations between characters, and identifying behaviorally extreme genotypes. This approach has led to identification of a major gene moderating alcohol acceptance in mice and has revealed a more complex polygenic system influencing morphine consumption. Phillips TJ, Belknap JK, Crabbe JC. Use of recombinant inbred strains to assess vulnerability to drug abuse at the genetic level J Addict Dis 10(1-2) 73-87 1991 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2065120&dopt=Abstract 2065120 96 Male 806.5 383 352 459.5 1178.5 544.5 342 343 410.5 258.5 528 484 353.5 410 332.5 261.5 417.5 442.5 453.5 365 472 536.5 12/19/2002 SACCONS SACCCON Saccharin mg/kg/day JKB MRG 020402 with JKB 2065120.96 Locomotor activity post cocaine (32 mg/kg) [activity counts/hr] The present study investigated the effects of acute and repeated administration of cocaine (1.0-56.0 mg/kg) on locomotor activity in the genetically distinct DBA/2J and C57BL/6J inbred strains of mice. In addition, quantitative trait loci analysis of the effects of acute and repeated cocaine in 16 BXD recombinant inbred strains was used to provisionally detect and map minor gene loci which associate with cocaine responsiveness. Whereas locomotor activity was elevated maximally in both strains by 32 mg/kg of cocaine, DBA/2J mice were stimulated to a much greater extent than C57BL/6J mice. The stimulant effects of cocaine were diminished to control levels in DBA/2J mice after repeated daily injections, whereas cocaine-induced locomotion remained consistent in C57BL/6J mice throughout the 7-day testing period. Emergence of stereotyped behavior with repeated daily injections of 32 mg/kg of cocaine was observed in DBA/2J but not C57BL/6J mice. No differences in brain cocaine levels were found between the DBA/2J and C57BL/6J strains after acute or repeated injections. Quantitative trait loci analysis indicated significant associations of differences in cocaine responsiveness with marker loci on several chromosomes in the BXD recombinant inbred series. Those marker loci associated with the acute cocaine response were in most cases different from those markers associated with long-term responses. The current results demonstrate that genotype-dependent variation exists in behavioral responsiveness to cocaine in mice and suggest that the acute and long-term responses to cocaine may be under the control of separate sets of genes. Tolliver BK, Belknap JK, Woods WE, Carney JM. Genetic analysis of sensitization and tolerance to cocaine J Pharmacol Exp Ther 270(3) 1230-1238 Sep 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7932176&dopt=Abstract 7932176 01 Male 3-8 activitycounts/hr 1481 89.0 2470 210.3 1814 239.1 2574 251.7 1557 134.3 1622 83.0 1333 69.4 1995 217.4 1787 73.8 2345 83.3 1702 88.7 1383 165.4 2158 112.0 1539 129.6 1494 189.3 1771 117.6 1597 115.8 1909 166.4 6/26/2003 MK Sullivan COCACT32 COACT Cocaine 32 mg/kg Tolliver/JKB p. 1235, Fig 6 MRG 011002 with JKB by publication 7932176.01 Sensitization of locomotor response to cocaine (32 mg/kg) [% initial response] The present study investigated the effects of acute and repeated administration of cocaine (1.0-56.0 mg/kg) on locomotor activity in the genetically distinct DBA/2J and C57BL/6J inbred strains of mice. In addition, quantitative trait loci analysis of the effects of acute and repeated cocaine in 16 BXD recombinant inbred strains was used to provisionally detect and map minor gene loci which associate with cocaine responsiveness. Whereas locomotor activity was elevated maximally in both strains by 32 mg/kg of cocaine, DBA/2J mice were stimulated to a much greater extent than C57BL/6J mice. The stimulant effects of cocaine were diminished to control levels in DBA/2J mice after repeated daily injections, whereas cocaine-induced locomotion remained consistent in C57BL/6J mice throughout the 7-day testing period. Emergence of stereotyped behavior with repeated daily injections of 32 mg/kg of cocaine was observed in DBA/2J but not C57BL/6J mice. No differences in brain cocaine levels were found between the DBA/2J and C57BL/6J strains after acute or repeated injections. Quantitative trait loci analysis indicated significant associations of differences in cocaine responsiveness with marker loci on several chromosomes in the BXD recombinant inbred series. Those marker loci associated with the acute cocaine response were in most cases different from those markers associated with long-term responses. The current results demonstrate that genotype-dependent variation exists in behavioral responsiveness to cocaine in mice and suggest that the acute and long-term responses to cocaine may be under the control of separate sets of genes. Tolliver BK, Belknap JK, Woods WE, Carney JM. Genetic analysis of sensitization and tolerance to cocaine J Pharmacol Exp Ther 270(3) 1230-1238 Sep 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7932176&dopt=Abstract 7932176 02 Male 3-8 % initial response 81.4 28.2 92.5 71.7 111.4 128.7 97.1 53.1 115.0 59 81.3 100 87.4 86.4 102.0 102 88.6 90 6/26/2003 MK Sullivan COCSEN32 COSENSIT Cocaine 32 mg/kg Tolliver/JKB p. 1235, Fig 6 MRG 011002 with JKB by publication 7932176.02 Body weight [g] Adult C57BL/6J (B6) male mice had 37% heavier brains than did DBA/2J (D2) mice, while their body weights did not differ. The BXD recombinant inbred (RI) series of 20 strains, derived from a cross between B6 and D2 inbred strains, was used as the initial screen to determine significant associations between male brain weight and brain:body weight ratio, with allelic variation at 360 known marker gene loci. For brain weight, this yielded five candidate chromosome regions, each reflecting a possible quantitative trait locus (QTL) site affecting brain weight. The second step was to test as many of these five as possible using standard (non-RI) inbred strain data for brain weight previously reported in the literature. For this purpose, only strains possessing the same alleles as the B6 or D2 strains were used. Sufficient data to test two of the five candidate QTL were available. Of these, one was strongly supported as a site affecting brain weight--the D7rp2 region of chromosome 7. For the brain to body weight ratio, four chromosome regions emerged as significantly associated in the BXD series, but none were amenable to testing due to a lack of allelic information for the standard inbred strains. However, two of these regions showed highly significant associations (p less than 0.001, single test) that merit consideration as QTL sites for future testing. These two are the Hba region on chromosome 11 and the D17Tu7 region on chromosome 17. The genetic correlation between brain and body weight was low (r = 0.28), indicating that these two traits are largely genetically independent in the BXD RI series. Belknap JK, Phillips TJ, O'Toole LA. Quantitative trait loci associated with brain weight in the BXD/Ty recombinant inbred mouse strains Brain Res Bul 29(3-4) 337-344 Sept-Oct 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1393606&dopt=Abstract 1393606 01 11-13 wks 77 91 Male 7-8 g 25.5 1.71 25.5 2.08 27.6 1.60 28.4 1.84 26.1 1.84 25 2.00 26.4 1.25 27.1 1.64 25.2 0.96 29.3 1.75 30.4 1.60 27.8 1.54 26.75 1.91 29 2.56 28.4 3.26 25.1 0.79 24.3 2.42 25 1.66 24.7 2.17 25.2 2.06 26.3 1.83 24.7 2.23 6/24/2003 MK Sullivan BODYWGT BODWGT BODYWGT JKB p. 340, Table 1 MRG 011002 with JKB by publication 1393606.01 Brain weight [mg] Adult C57BL/6J (B6) male mice had 37% heavier brains than did DBA/2J (D2) mice, while their body weights did not differ. The BXD recombinant inbred (RI) series of 20 strains, derived from a cross between B6 and D2 inbred strains, was used as the initial screen to determine significant associations between male brain weight and brain:body weight ratio, with allelic variation at 360 known marker gene loci. For brain weight, this yielded five candidate chromosome regions, each reflecting a possible quantitative trait locus (QTL) site affecting brain weight. The second step was to test as many of these five as possible using standard (non-RI) inbred strain data for brain weight previously reported in the literature. For this purpose, only strains possessing the same alleles as the B6 or D2 strains were used. Sufficient data to test two of the five candidate QTL were available. Of these, one was strongly supported as a site affecting brain weight--the D7rp2 region of chromosome 7. For the brain to body weight ratio, four chromosome regions emerged as significantly associated in the BXD series, but none were amenable to testing due to a lack of allelic information for the standard inbred strains. However, two of these regions showed highly significant associations (p less than 0.001, single test) that merit consideration as QTL sites for future testing. These two are the Hba region on chromosome 11 and the D17Tu7 region on chromosome 17. The genetic correlation between brain and body weight was low (r = 0.28), indicating that these two traits are largely genetically independent in the BXD RI series. Belknap JK, Phillips TJ, O'Toole LA. Quantitative trait loci associated with brain weight in the BXD/Ty recombinant inbred mouse strains Brain Res Bul 29(3-4) 337-344 Sept-Oct 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1393606&dopt=Abstract 1393606 02 11-13 wks 77 91 Male 7-8 mg 465 23 339 19 450 22 390 19 477 27 361 16 421 13 419 15 412 13 403 9 439 9 429 14 436 16 427 13 409 20 431 10 432 30 380 17 394 16 381 18 389 20 375 11 6/24/2003 MK Sullivan BRAINWGT BRAINWGT BRAINWGT JKB p. 340, Table 1 MRG 011002 with JKB by publication 1393606.02 Cocaine in mg/kg (infused via tail vein) to induce tonic seizure [mg/kg] Seizures are a well known consequence of human cocaine abuse, and in rodent models, sensitivity to cocaine seizures has been shown to be strongly influenced by genotype. For example, several studies have reported significant differences between the C57BL/6 (B6) and DBA/2 (D2) inbred mouse strains in their sensitivity to cocaine-induced seizures. This prompted our use of the BXD recombinant inbred (RI) strain set and an F(2) population derived from the B6 and D2 progenitor strains for further genetic analyses and for gene mapping efforts in this study. Cocaine was infused into the lateral tail vein, and the doses needed to induce a running bouncing clonic seizure and a tonic hindlimb extensor seizure were recorded for each mouse. In the BXD RI set, a genome-wide search was carried out for QTLs (quantitative trait loci), which are sites on a chromosome containing genes that influence seizure susceptibility. An F(2) population (B6D2F2, n = 408) was subsequently used as a second, confirmation step. Based on both RI and F(2) results, three QTLs emerged as significant (P <.00005): one for clonic seizures on chromosome 9 (distal), and two for tonic seizures on chromosomes 14 (proximal to mid) and 15 (distal). Two additional QTLs emerged as suggestive (P <.0015), both associated with clonic seizures on chromosomes 9 (proximal) and 15 (distal). Both QTLs on chromosome 9 were sex-specific, with much larger effects on the phenotype seen in females than in males. Hain HS, Crabbe JC, Bergeson SE, Belknap JK. Cocaine-induced seizure thresholds: quantitative trait loci detection and mapping in two populations derived from the C57BL/6 and DBA/2 mouse strains J Pharmacol Exp Ther 293(1) 180-187 Apr 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10734168&dopt=Abstract 10734168 01 56-100 days 56 100 Female 7-16 mg/kg 36.5092843340253 1.05 45.8623787362414 1.15 42.9703626911218 1.99 46.3609349736889 1.81 43.4960099553144 3.05 48.0771280463759 2.93 44.6149206926665 2.06 38.9730137289765 1.64 48.6677557555129 1.60 39.5212449334861 1.03 39.4036744928305 1.27 39.9767680020278 1.74 37.3012008962622 1.55 43.3300328369933 1.78 39.4037704331372 1.18 45.4332262655791 1.24 35.9427625388382 1.01 49.5509290179926 2.94 38.7927845701966 1.48 46.6208980595439 3.05 38.7701207182665 1.08 38.7466553026451 1.64 44.3891465498985 2.56 42.0057332089545 1.24 34.0522375511561 0.70 44.0018244149537 1.59 6/4/2003 MK Sullivan MK Sullivan COCTON MGKGTON Cocaine 1mg/ml RI-166 JKB/JCC p. 182, Fig.1 top JD 121301 from publication 10734168.01 Cocaine in mg/kg (infused via tail vein) to induce clonic seizure [mg/kg] Seizures are a well known consequence of human cocaine abuse, and in rodent models, sensitivity to cocaine seizures has been shown to be strongly influenced by genotype. For example, several studies have reported significant differences between the C57BL/6 (B6) and DBA/2 (D2) inbred mouse strains in their sensitivity to cocaine-induced seizures. This prompted our use of the BXD recombinant inbred (RI) strain set and an F(2) population derived from the B6 and D2 progenitor strains for further genetic analyses and for gene mapping efforts in this study. Cocaine was infused into the lateral tail vein, and the doses needed to induce a running bouncing clonic seizure and a tonic hindlimb extensor seizure were recorded for each mouse. In the BXD RI set, a genome-wide search was carried out for QTLs (quantitative trait loci), which are sites on a chromosome containing genes that influence seizure susceptibility. An F(2) population (B6D2F2, n = 408) was subsequently used as a second, confirmation step. Based on both RI and F(2) results, three QTLs emerged as significant (P <.00005): one for clonic seizures on chromosome 9 (distal), and two for tonic seizures on chromosomes 14 (proximal to mid) and 15 (distal). Two additional QTLs emerged as suggestive (P <.0015), both associated with clonic seizures on chromosomes 9 (proximal) and 15 (distal). Both QTLs on chromosome 9 were sex-specific, with much larger effects on the phenotype seen in females than in males. Hain HS, Crabbe JC, Bergeson SE, Belknap JK. Cocaine-induced seizure thresholds: quantitative trait loci detection and mapping in two populations derived from the C57BL/6 and DBA/2 mouse strains J Pharmacol Exp Ther 293(1) 180-187 Apr 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10734168&dopt=Abstract 10734168 02 56-100 days 56 100 Female 7-16 mg/kg 21.1275869781027 0.75 21.903677521797 1.59 24.3794503374416 3.26 21.8333066738383 2.18 21.6786293001535 2.46 20.1582397852819 1.24 23.9731186492713 1.45 21.8606255012244 1.83 24.867635937228 1.55 17.5034216551746 1.22 21.7689514914138 0.99 21.8178716923466 1.76 17.4457084496112 1.71 20.1131869961416 1.18 24.3516411928639 1.45 23.4871948042632 1.45 20.3500609275227 1.01 23.5815221713196 2.51 20.7144960755053 1.72 22.1648480352814 2.23 22.8863072036995 1.95 19.6430463704733 1.43 20.8623671215829 1.66 22.8056520761417 1.66 20.1509430417039 1.20 20.7370448138035 0.98 6/4/2003 MK Sullivan MK Sullivan COCCLO MGKGCLO Cocaine 1mg/ml RI-166 JKB/JCC p. 182, Fig.1 bottom JD 121301 from publication 10734168.02 Acute ethanol activity response - Difference between experimental 2g/kg ip EtOH and saline control group [activity counts/min] Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 01 56-125 days 56 125 Male 13-34 activity counts/min 28.869 8.34 75.200 8.27 42.207 8.30 20.144 4.90 36.412 2.44 15.49 3.92 85.832 4.97 49.069 4.57 52.4 6.92 2.147 4.90 43.093 4.50 58.071 6.34 18.172 2.91 15.048 2.78 44.434 7.15 50.538 5.53 33.052 5.00 28.221 3.84 68.007 9.87 38.566 10.60 23.353 4.77 31.488 5.05 7/3/2003 MK Sullivan ETSALACT(C1DIFF) Figure 1 data; also EtOH: Act in Tables 4-5 E1MS1; C1 EtOH 2 g/kg CPP-59 CLC Fig 1; Tables 4-5 MRG 120601 from publication 7480533.01 Within-subject tolerance/sensitization to ethanol effects on locomotor activity (i.e., 4th ethanol trial activity minus 1st ethanol trial activity) Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 02 56-125 days 56 125 Male -59.094 26.921 -44.237 -26.048 -22.375 -47.387 -10.206 15.869 -37.031 -23.027 -19.28 -30.107 -15.159 -29.042 -1.931 10.117 -2.704 7.3 -34.855 34.772 -15.973 -4.218 12/20/2002 ETSEN (C4C1) SENS1: ACT E4ME1 EtOH 2 g/kg CPP-59 CLC means not in paper; analyzed in Tables 4-5 MRG 120601 from publication 7480533.02 Ethanol induced conditioned place preference - Time on EtOH paired floor during 30 min test [%] Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 03 56-125 days 56 125 Male 6-16 % 58.316 2.38 59.618 3.38 65.087 3.56 62.43 3.56 54.588 2.58 63.214 2.80 59.001 2.26 60.163 2.01 78.344 3.80 57.973 2.87 59.701 2.74 55.239 2.54 64.039 2.92 61.564 5.14 57.696 1.98 49.491 1.80 65.529 5.04 74.6 3.32 49.865 2.18 66.859 4.08 54.526 3.50 53.349 1.99 7/2/2003 MK Sullivan ETCPP PREF PDT30 EtOH 2 g/kg CPP-59 CLC p. 33, Fig 2 JD 010302 from publication 7480533.03 Within-subject habituation (i.e., 4th saline trial activity minus 1st saline activity trial activity) [Unpublished means from same series of studies as reported in: Cunningham 1995 PsychoPharm 120:28-41] Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 95 56-125 days 56 125 Male -47.925 -10.243 -37.8 -36.568 -13.088 -41.865 -18.465 -20.793 -21.569 -32.167 -22.473 -23.9 -8.386 -17.503 -14.676 -6.034 -11.252 -6.357 -32.848 -26.041 -14.067 -18.888 12/19/2002 SALACT(C4C1) S4MS1 Saline CPP-59 CLC JD 010302 from publication 7480533.95 Acute Locomotor Activity Response to 2 g/kg i.p. EtOH on 11th day in chronic saline injected mice, 1- 5 minutes after injection [cm] Investigations of ethanol's (EtOH's) complex response profile, including locomotor and other effects, are likely to lead to a more in-depth understanding of the constituents of alcohol addiction. Locomotor activity responses to acute and repeated EtOH (2 g/kg, i.p) exposures were measured in BXD recombinant inbred (RI) mice and their C57BL/6J (B6) and DBA/2J (D2) progenitors. Both the acute response and the change in initial EtOH response with repeated treatments were strain-dependent. The coefficient of genetic determination was 0.38-0.49 for initial locomotor response to EtOH, and 0.29 for change in response. Changes in response were largely attributable to sensitization of locomotor stimulation. Quantitative trait loci (QTL) analyses identified significant marker associations with basal activity, acute locomotor response, and change in response. Markers were for QTL on several chromosomes, and there was only one case of overlap in marker associations among phenotypes. Acute locomotor response and locomotor sensitization were negatively correlated with 3% EtOH preference drinking data collected in BXD RI strains. Overall, these results demonstrate locomotor sensitization induced by EtOH, suggest independence of genetic determination of locomotor responses to acute and repeated EtOH exposure, and partially support a relationship between reduced sensitivity to the locomotor stimulant/sensitizing effects of EtOH and EtOH consumption. Phillips TJ, Huson M, Gwiazdon C, Burkhart-Kasch S, Shen EH. Effects of acute and repeated ethanol exposures on the locomotor activity of BXD recombinant inbred mice Alcohol Clin Exp Res 19(2) 269-278. Apr 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7625557&dopt=Abstract 7625557 95351511 01 7-19 wks 49 133 Female Horizontal Distance traveled cm 546 973 -241 725 -208 -493 1185 358 921 387 662 813 -266 38 726 1074 454 996 194 1242 837 529 309 12/27/2002 ETACT2(CS) ACCS CS5D11D2 EtOH 2 g/kg RI-58 TJP Figure 1 inset y-axis, p. 273 MRG 010202 with TJP from publication and data file 7625557.01 Ethanol Locomotor Sensitization Between Group: Acute Response to 2 g/kg EtOH, Day 11 Locomotor Activity Difference (Chronic EtOH minus Chronic Saline), 1-5 minutes after injection [cm] Investigations of ethanol's (EtOH's) complex response profile, including locomotor and other effects, are likely to lead to a more in-depth understanding of the constituents of alcohol addiction. Locomotor activity responses to acute and repeated EtOH (2 g/kg, i.p) exposures were measured in BXD recombinant inbred (RI) mice and their C57BL/6J (B6) and DBA/2J (D2) progenitors. Both the acute response and the change in initial EtOH response with repeated treatments were strain-dependent. The coefficient of genetic determination was 0.38-0.49 for initial locomotor response to EtOH, and 0.29 for change in response. Changes in response were largely attributable to sensitization of locomotor stimulation. Quantitative trait loci (QTL) analyses identified significant marker associations with basal activity, acute locomotor response, and change in response. Markers were for QTL on several chromosomes, and there was only one case of overlap in marker associations among phenotypes. Acute locomotor response and locomotor sensitization were negatively correlated with 3% EtOH preference drinking data collected in BXD RI strains. Overall, these results demonstrate locomotor sensitization induced by EtOH, suggest independence of genetic determination of locomotor responses to acute and repeated EtOH exposure, and partially support a relationship between reduced sensitivity to the locomotor stimulant/sensitizing effects of EtOH and EtOH consumption. Phillips TJ, Huson M, Gwiazdon C, Burkhart-Kasch S, Shen EH. Effects of acute and repeated ethanol exposures on the locomotor activity of BXD recombinant inbred mice Alcohol Clin Exp Res 19(2) 269-278. Apr 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7625557&dopt=Abstract 7625557 95351511 02 7-19 wks 49 133 Female Horizontal Distance traveled cm -694 -134 -468 507 435 395 -558 663 456 -372 1226 275 176 1026 1065 696 -62 758 935 430 388 677 356 12/27/2002 ETSEN2(BG) deltaBG BGSENS5M EtOH 2 g/kg RI-58 TJP Figure 2 inset y-axis, p. 273 MRG 010202 with TJP from publication and data file 7625557.02 Ethanol Locomotor Sensitization Within Group: Change in locomotor response, 1 - 5 minutes after 2 g/kg EtOH injection (i.p) after repeated treatment; Day 11 (fifth EtOH treatment) minus Day 3 (first EtOH treatment) for the chronic EtOH group [cm] Investigations of ethanol's (EtOH's) complex response profile, including locomotor and other effects, are likely to lead to a more in-depth understanding of the constituents of alcohol addiction. Locomotor activity responses to acute and repeated EtOH (2 g/kg, i.p) exposures were measured in BXD recombinant inbred (RI) mice and their C57BL/6J (B6) and DBA/2J (D2) progenitors. Both the acute response and the change in initial EtOH response with repeated treatments were strain-dependent. The coefficient of genetic determination was 0.38-0.49 for initial locomotor response to EtOH, and 0.29 for change in response. Changes in response were largely attributable to sensitization of locomotor stimulation. Quantitative trait loci (QTL) analyses identified significant marker associations with basal activity, acute locomotor response, and change in response. Markers were for QTL on several chromosomes, and there was only one case of overlap in marker associations among phenotypes. Acute locomotor response and locomotor sensitization were negatively correlated with 3% EtOH preference drinking data collected in BXD RI strains. Overall, these results demonstrate locomotor sensitization induced by EtOH, suggest independence of genetic determination of locomotor responses to acute and repeated EtOH exposure, and partially support a relationship between reduced sensitivity to the locomotor stimulant/sensitizing effects of EtOH and EtOH consumption. Phillips TJ, Huson M, Gwiazdon C, Burkhart-Kasch S, Shen EH. Effects of acute and repeated ethanol exposures on the locomotor activity of BXD recombinant inbred mice Alcohol Clin Exp Res 19(2) 269-278. Apr 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7625557&dopt=Abstract 7625557 95351511 03 7-19 wks 49 133 Female Horizontal Distance traveled cm -318 124 -725 350 -866 200 260 289 279 117 -51 223 -1013 488 1060 303 726 492 -297 303 644 309 -46 231 365 188 433 242 1119 309 682 427 39 242 1125 293 899 175 252 203 402 270 586 298 192 266 7/2/2003 MK Sullivan ETSEN2(CD) deltaCD D11D35M EtOH 2 g/kg RI-58 TJP Figure 2 and Figure 2 inset x-axis, p. 273 MRG 010202 with TJP from publication and data file 7625557.03 Acute locomotor response, 1 to 5 minutes after 2g/kg i.p. EtOH in chronic ethanol sensitized mice [cm] Investigations of ethanol's (EtOH's) complex response profile, including locomotor and other effects, are likely to lead to a more in-depth understanding of the constituents of alcohol addiction. Locomotor activity responses to acute and repeated EtOH (2 g/kg, i.p) exposures were measured in BXD recombinant inbred (RI) mice and their C57BL/6J (B6) and DBA/2J (D2) progenitors. Both the acute response and the change in initial EtOH response with repeated treatments were strain-dependent. The coefficient of genetic determination was 0.38-0.49 for initial locomotor response to EtOH, and 0.29 for change in response. Changes in response were largely attributable to sensitization of locomotor stimulation. Quantitative trait loci (QTL) analyses identified significant marker associations with basal activity, acute locomotor response, and change in response. Markers were for QTL on several chromosomes, and there was only one case of overlap in marker associations among phenotypes. Acute locomotor response and locomotor sensitization were negatively correlated with 3% EtOH preference drinking data collected in BXD RI strains. Overall, these results demonstrate locomotor sensitization induced by EtOH, suggest independence of genetic determination of locomotor responses to acute and repeated EtOH exposure, and partially support a relationship between reduced sensitivity to the locomotor stimulant/sensitizing effects of EtOH and EtOH consumption. Phillips TJ, Huson M, Gwiazdon C, Burkhart-Kasch S, Shen EH. Effects of acute and repeated ethanol exposures on the locomotor activity of BXD recombinant inbred mice Alcohol Clin Exp Res 19(2) 269-278. Apr 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7625557&dopt=Abstract 7625557 95351511 04 7-19 wks 49 133 Female Horizontal Distance traveled cm 84 114 1521 263 268 265 843 100 -174 95 -36 138 1587 358 -162 174 924 396 504 168 976 200 1157 243 -204 121 649 159 675 187 1026 284 163 124 644 210 45 87 1445 189 891 181 747 193 382 143 7/2/2003 MK Sullivan ETACT2(CD) ACCD D3D25M EtOH 2 g/kg RI-58 TJP Figure 1 and Figure 1 inset x-axis, p. 273 MRG 010202 with TJP from publication and data file 7625557.04 Locomotor Activity Day 2, 1 - 5 minutes after saline i.p. [cm] Investigations of ethanol's (EtOH's) complex response profile, including locomotor and other effects, are likely to lead to a more in-depth understanding of the constituents of alcohol addiction. Locomotor activity responses to acute and repeated EtOH (2 g/kg, i.p) exposures were measured in BXD recombinant inbred (RI) mice and their C57BL/6J (B6) and DBA/2J (D2) progenitors. Both the acute response and the change in initial EtOH response with repeated treatments were strain-dependent. The coefficient of genetic determination was 0.38-0.49 for initial locomotor response to EtOH, and 0.29 for change in response. Changes in response were largely attributable to sensitization of locomotor stimulation. Quantitative trait loci (QTL) analyses identified significant marker associations with basal activity, acute locomotor response, and change in response. Markers were for QTL on several chromosomes, and there was only one case of overlap in marker associations among phenotypes. Acute locomotor response and locomotor sensitization were negatively correlated with 3% EtOH preference drinking data collected in BXD RI strains. Overall, these results demonstrate locomotor sensitization induced by EtOH, suggest independence of genetic determination of locomotor responses to acute and repeated EtOH exposure, and partially support a relationship between reduced sensitivity to the locomotor stimulant/sensitizing effects of EtOH and EtOH consumption. Phillips TJ, Huson M, Gwiazdon C, Burkhart-Kasch S, Shen EH. Effects of acute and repeated ethanol exposures on the locomotor activity of BXD recombinant inbred mice Alcohol Clin Exp Res 19(2) 269-278. Apr 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7625557&dopt=Abstract 7625557 95351511 05 7-19 wks 49 133 Female Horizontal Distance traveled cm 1447 1362 1661 1528 1086 1162 886 1845 573 1643 1175 1729 1171 1035 2014 1411 949 1264 823 1360 1074 899 2146 12/27/2002 SALACT(5MIN) BASACT5 SAL5M Saline RI-58 TJP Basis for QTL analysis of basal activity, p. 272 Table 2 MRG 010202 with TJP from publication and data file 7625557.05 Consumption of 0.2% saccharin (mg/kg) vs. tap water; means of days 2 and 4 of a 4-day 24-hr access period [g/kg/day] The genomic map locations of specific genes controlling behaviors can be identified by studying a panel of recombinant inbred (RI) mouse strains. The progenitor C57BL/6J (B6) and DBA/2J (D2) strains, and 19 of the BXD RI strains derived from an F2 cross of these progenitors, were tested for 3% and 10% ethanol (EtOH) intake. The test sequence began with two-bottle free choice between tap water and unsweetened ethanol, and ended with free choice between water and saccharin-sweetened ethanol. Saccharin preference was also measured. Correlational analyses indicated that 59% of the genetic variance in 10% ethanol and sweetened 10% ethanol consumption was held in common, 24% of the genetic variance in saccharin and sweetened 10% ethanol consumption was held in common, and only 7% of the genetic variance in saccharin and unsweetened 10% ethanol consumption was held in common. These percentages for 3% ethanol solutions were 21%, 36%, and 14%. In addition, the severity of handling-induced convulsions during ethanol withdrawal was found to be significantly associated with the amount of ethanol consumed from the sweetened ethanol drinking tubes, suggesting that genetic differences in avidity for ethanol could lead to the development of physical dependence. Quantitative trait loci (QTL) analyses revealed that several genetic markers were associated with ethanol consumption levels, including markers for the D2 dopamine receptor. QTL analyses of saccharin and sweetened ethanol consumption identified the sac locus, thought to determine the ability to detect saccharin. In general, our results suggest that saccharin and ethanol consumption are determined by the actions of multiple genes (QTL), some in common, and suggest specific map locations of several such QTL on the mouse genome. Phillips TJ, Crabbe JC, Metten P, Belknap JK. Localization of genes affecting alcohol drinking in mice. Alcohol Clin Exp Res 18(4) 931-941 Aug 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7978106&dopt=Abstract 7978106 01 51-125 days 51 125 Female 10-18 g/kg/day 853.935 111.717 471.707 73.838 250.743 80.303 748.408 168.939 787.394 43.939 330.42 58.485 343.077 57.980 420.033 54.495 537.171 90.909 652.835 72.576 415.414 47.879 412.785 59.596 639.584 75.253 533.912 23.333 438.621 105.001 674.217 92.980 807.822 70.152 534.837 58.434 1071.038 88.637 591.661 116.768 572.167 55.012 7/11/2003 MK Sullivan SACCONS0.2(%) 0.2%SacCon AVSACCON Saccharin 0.002 RI-72 TJP p. 935, Fig. 2 MRG 010202 with TJP from publication and data file 7978106.01 Consumption of 3% Ethanol (g/kg) vs. tap water; means of days 2 and 4 of a 4-day 24-hr access period [g/kg/day] The genomic map locations of specific genes controlling behaviors can be identified by studying a panel of recombinant inbred (RI) mouse strains. The progenitor C57BL/6J (B6) and DBA/2J (D2) strains, and 19 of the BXD RI strains derived from an F2 cross of these progenitors, were tested for 3% and 10% ethanol (EtOH) intake. The test sequence began with two-bottle free choice between tap water and unsweetened ethanol, and ended with free choice between water and saccharin-sweetened ethanol. Saccharin preference was also measured. Correlational analyses indicated that 59% of the genetic variance in 10% ethanol and sweetened 10% ethanol consumption was held in common, 24% of the genetic variance in saccharin and sweetened 10% ethanol consumption was held in common, and only 7% of the genetic variance in saccharin and unsweetened 10% ethanol consumption was held in common. These percentages for 3% ethanol solutions were 21%, 36%, and 14%. In addition, the severity of handling-induced convulsions during ethanol withdrawal was found to be significantly associated with the amount of ethanol consumed from the sweetened ethanol drinking tubes, suggesting that genetic differences in avidity for ethanol could lead to the development of physical dependence. Quantitative trait loci (QTL) analyses revealed that several genetic markers were associated with ethanol consumption levels, including markers for the D2 dopamine receptor. QTL analyses of saccharin and sweetened ethanol consumption identified the sac locus, thought to determine the ability to detect saccharin. In general, our results suggest that saccharin and ethanol consumption are determined by the actions of multiple genes (QTL), some in common, and suggest specific map locations of several such QTL on the mouse genome. Phillips TJ, Crabbe JC, Metten P, Belknap JK. Localization of genes affecting alcohol drinking in mice. Alcohol Clin Exp Res 18(4) 931-941 Aug 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7978106&dopt=Abstract 7978106 02 51-125 days 51 125 Female 10-18 g/kg/day 3.538 0.557 0.279 0.264 2.052 0.841 1.669 0.734 2.086 0.417 0.981 0.301 2.765 0.446 0.438 0.286 0.906 0.374 3.578 0.657 2.218 0.539 0.951 0.341 2.975 0.403 0.967 0.516 1.64 0.786 0.614 0.246 1.741 0.551 2.159 0.821 2.795 0.517 2.658 0.601 0.819 0.429 7/11/2003 MK Sullivan ETCONS3(%) 3%EtOHCon AV3EG EtOH 0.03 RI-72 TJP p. 934, Fig.1 MRG 010202 with TJP from publication and data file 7978106.02 Consumption of 3% Ethanol (g/kg) in 0.2% saccharin vs. tap water; means of days 2 and 4 of a 4-day 24-hr access period [g/kg/day] The genomic map locations of specific genes controlling behaviors can be identified by studying a panel of recombinant inbred (RI) mouse strains. The progenitor C57BL/6J (B6) and DBA/2J (D2) strains, and 19 of the BXD RI strains derived from an F2 cross of these progenitors, were tested for 3% and 10% ethanol (EtOH) intake. The test sequence began with two-bottle free choice between tap water and unsweetened ethanol, and ended with free choice between water and saccharin-sweetened ethanol. Saccharin preference was also measured. Correlational analyses indicated that 59% of the genetic variance in 10% ethanol and sweetened 10% ethanol consumption was held in common, 24% of the genetic variance in saccharin and sweetened 10% ethanol consumption was held in common, and only 7% of the genetic variance in saccharin and unsweetened 10% ethanol consumption was held in common. These percentages for 3% ethanol solutions were 21%, 36%, and 14%. In addition, the severity of handling-induced convulsions during ethanol withdrawal was found to be significantly associated with the amount of ethanol consumed from the sweetened ethanol drinking tubes, suggesting that genetic differences in avidity for ethanol could lead to the development of physical dependence. Quantitative trait loci (QTL) analyses revealed that several genetic markers were associated with ethanol consumption levels, including markers for the D2 dopamine receptor. QTL analyses of saccharin and sweetened ethanol consumption identified the sac locus, thought to determine the ability to detect saccharin. In general, our results suggest that saccharin and ethanol consumption are determined by the actions of multiple genes (QTL), some in common, and suggest specific map locations of several such QTL on the mouse genome. Phillips TJ, Crabbe JC, Metten P, Belknap JK. Localization of genes affecting alcohol drinking in mice. Alcohol Clin Exp Res 18(4) 931-941 Aug 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7978106&dopt=Abstract 7978106 03 51-125 days 51 125 Female 10-18 g/kg/day 10.965 0.635 2.000 0.721 6.135 0.833 11.207 1.051 7.023 0.829 2.924 0.633 4.828 0.424 6.245 1.666 6.159 0.945 7.236 0.875 5.58 0.563 3.274 0.845 5.534 0.614 5.473 0.547 11.658 0.719 6.992 0.630 8.083 0.547 6.646 0.766 10.266 0.896 7.308 1.060 4.638 0.980 7/11/2003 MK Sullivan ETSACCONS3(%) 3%EtOH/SacCon AV3SG EtOH 0.03 RI-72 TJP p. 935, Fig. 2 MRG 010202 with TJP from publication and data file 7978106.03 Consumption of 10% Ethanol (g/kg) in tap water offered vs. tap water; means are the average of days 2 and 4 of a 4-day 24-hr access period [g/kg/day] The genomic map locations of specific genes controlling behaviors can be identified by studying a panel of recombinant inbred (RI) mouse strains. The progenitor C57BL/6J (B6) and DBA/2J (D2) strains, and 19 of the BXD RI strains derived from an F2 cross of these progenitors, were tested for 3% and 10% ethanol (EtOH) intake. The test sequence began with two-bottle free choice between tap water and unsweetened ethanol, and ended with free choice between water and saccharin-sweetened ethanol. Saccharin preference was also measured. Correlational analyses indicated that 59% of the genetic variance in 10% ethanol and sweetened 10% ethanol consumption was held in common, 24% of the genetic variance in saccharin and sweetened 10% ethanol consumption was held in common, and only 7% of the genetic variance in saccharin and unsweetened 10% ethanol consumption was held in common. These percentages for 3% ethanol solutions were 21%, 36%, and 14%. In addition, the severity of handling-induced convulsions during ethanol withdrawal was found to be significantly associated with the amount of ethanol consumed from the sweetened ethanol drinking tubes, suggesting that genetic differences in avidity for ethanol could lead to the development of physical dependence. Quantitative trait loci (QTL) analyses revealed that several genetic markers were associated with ethanol consumption levels, including markers for the D2 dopamine receptor. QTL analyses of saccharin and sweetened ethanol consumption identified the sac locus, thought to determine the ability to detect saccharin. In general, our results suggest that saccharin and ethanol consumption are determined by the actions of multiple genes (QTL), some in common, and suggest specific map locations of several such QTL on the mouse genome. Phillips TJ, Crabbe JC, Metten P, Belknap JK. Localization of genes affecting alcohol drinking in mice. Alcohol Clin Exp Res 18(4) 931-941 Aug 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7978106&dopt=Abstract 7978106 04 51-125 days 51 125 Female 10-18 g/kg/day 10.562 1.319 1.306 0.981 6.084 1.505 5.506 1.192 4.425 1.008 0.601 0.012 2.759 0.918 0.687 0.411 1.741 0.613 5.836 1.210 4.849 1.407 0.364 0.105 2.477 0.916 2.589 1.017 2.203 1.032 2.417 0.805 2.024 0.706 6.658 0.903 2.466 0.901 8.096 1.403 1.28 0.905 7/11/2003 MK Sullivan ETCONS10(%) 10%EtOHCon AV10EG EtOH 0.1 RI-72 TJP p. 934, Fig.1 MRG 010202 with TJP from publication and data file 7978106.04 Consumption of 10% Ethanol (g/kg) in 0.2% saccharin and tap water offered vs. tap water; means of days 2 and 4 of a 4-day 24-hr access period [g/kg/day] The genomic map locations of specific genes controlling behaviors can be identified by studying a panel of recombinant inbred (RI) mouse strains. The progenitor C57BL/6J (B6) and DBA/2J (D2) strains, and 19 of the BXD RI strains derived from an F2 cross of these progenitors, were tested for 3% and 10% ethanol (EtOH) intake. The test sequence began with two-bottle free choice between tap water and unsweetened ethanol, and ended with free choice between water and saccharin-sweetened ethanol. Saccharin preference was also measured. Correlational analyses indicated that 59% of the genetic variance in 10% ethanol and sweetened 10% ethanol consumption was held in common, 24% of the genetic variance in saccharin and sweetened 10% ethanol consumption was held in common, and only 7% of the genetic variance in saccharin and unsweetened 10% ethanol consumption was held in common. These percentages for 3% ethanol solutions were 21%, 36%, and 14%. In addition, the severity of handling-induced convulsions during ethanol withdrawal was found to be significantly associated with the amount of ethanol consumed from the sweetened ethanol drinking tubes, suggesting that genetic differences in avidity for ethanol could lead to the development of physical dependence. Quantitative trait loci (QTL) analyses revealed that several genetic markers were associated with ethanol consumption levels, including markers for the D2 dopamine receptor. QTL analyses of saccharin and sweetened ethanol consumption identified the sac locus, thought to determine the ability to detect saccharin. In general, our results suggest that saccharin and ethanol consumption are determined by the actions of multiple genes (QTL), some in common, and suggest specific map locations of several such QTL on the mouse genome. Phillips TJ, Crabbe JC, Metten P, Belknap JK. Localization of genes affecting alcohol drinking in mice. Alcohol Clin Exp Res 18(4) 931-941 Aug 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7978106&dopt=Abstract 7978106 05 51-125 days 51 125 Female 10-18 g/kg/day 18.194 1.847 1.05 0.660 11.378 1.216 13.58 1.435 12.161 1.241 1.98 0.637 6.256 1.020 6.588 2.212 5.727 1.120 14.376 0.540 11.1 1.626 3.678 1.112 6.692 1.543 8.083 1.528 15.58 1.78 10.256 0.747 10.05 0.235 12.975 1.642 13.02 1.740 12.737 0.871 4.135 1.568 7/11/2003 MK Sullivan ETSACCONS10(%) 10%EtOH/SacCon AV10SG EtOH 0.1 RI-72 TJP p. 935, Fig. 2 MRG 010202 with TJP from publication and data file 7978106.05 Corrected area under the Ethanol withdrawal curve; mice were assessed for handling-induced convulsions after voluntary ethanol consumption. The genomic map locations of specific genes controlling behaviors can be identified by studying a panel of recombinant inbred (RI) mouse strains. The progenitor C57BL/6J (B6) and DBA/2J (D2) strains, and 19 of the BXD RI strains derived from an F2 cross of these progenitors, were tested for 3% and 10% ethanol (EtOH) intake. The test sequence began with two-bottle free choice between tap water and unsweetened ethanol, and ended with free choice between water and saccharin-sweetened ethanol. Saccharin preference was also measured. Correlational analyses indicated that 59% of the genetic variance in 10% ethanol and sweetened 10% ethanol consumption was held in common, 24% of the genetic variance in saccharin and sweetened 10% ethanol consumption was held in common, and only 7% of the genetic variance in saccharin and unsweetened 10% ethanol consumption was held in common. These percentages for 3% ethanol solutions were 21%, 36%, and 14%. In addition, the severity of handling-induced convulsions during ethanol withdrawal was found to be significantly associated with the amount of ethanol consumed from the sweetened ethanol drinking tubes, suggesting that genetic differences in avidity for ethanol could lead to the development of physical dependence. Quantitative trait loci (QTL) analyses revealed that several genetic markers were associated with ethanol consumption levels, including markers for the D2 dopamine receptor. QTL analyses of saccharin and sweetened ethanol consumption identified the sac locus, thought to determine the ability to detect saccharin. In general, our results suggest that saccharin and ethanol consumption are determined by the actions of multiple genes (QTL), some in common, and suggest specific map locations of several such QTL on the mouse genome. Phillips TJ, Crabbe JC, Metten P, Belknap JK. Localization of genes affecting alcohol drinking in mice. Alcohol Clin Exp Res 18(4) 931-941 Aug 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7978106&dopt=Abstract 7978106 06 51-125 days 51 125 Female 10-18 5.66 2.61 0.52 2.18 5.69 0.6 1.64 1.05 1.17 3.21 4.68 0.48 0 4.82 1.26 1.75 2.33 3.3 3.42 0.31 1.5 12/20/2002 ETHIC EtOHWD COAUC EtOH 0.1 RI-72 TJP p.938, Table 2 MRG 010202 with TJP from publication and data file 7978106.06 Preference for 10% Ethanol (g/kg) in tap water offered vs. tap water; means are the average of days 2 and 4 of a 4-day 24-hr access period. The genomic map locations of specific genes controlling behaviors can be identified by studying a panel of recombinant inbred (RI) mouse strains. The progenitor C57BL/6J (B6) and DBA/2J (D2) strains, and 19 of the BXD RI strains derived from an F2 cross of these progenitors, were tested for 3% and 10% ethanol (EtOH) intake. The test sequence began with two-bottle free choice between tap water and unsweetened ethanol, and ended with free choice between water and saccharin-sweetened ethanol. Saccharin preference was also measured. Correlational analyses indicated that 59% of the genetic variance in 10% ethanol and sweetened 10% ethanol consumption was held in common, 24% of the genetic variance in saccharin and sweetened 10% ethanol consumption was held in common, and only 7% of the genetic variance in saccharin and unsweetened 10% ethanol consumption was held in common. These percentages for 3% ethanol solutions were 21%, 36%, and 14%. In addition, the severity of handling-induced convulsions during ethanol withdrawal was found to be significantly associated with the amount of ethanol consumed from the sweetened ethanol drinking tubes, suggesting that genetic differences in avidity for ethanol could lead to the development of physical dependence. Quantitative trait loci (QTL) analyses revealed that several genetic markers were associated with ethanol consumption levels, including markers for the D2 dopamine receptor. QTL analyses of saccharin and sweetened ethanol consumption identified the sac locus, thought to determine the ability to detect saccharin. In general, our results suggest that saccharin and ethanol consumption are determined by the actions of multiple genes (QTL), some in common, and suggest specific map locations of several such QTL on the mouse genome. Phillips TJ, Crabbe JC, Metten P, Belknap JK. Localization of genes affecting alcohol drinking in mice. Alcohol Clin Exp Res 18(4) 931-941 Aug 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7978106&dopt=Abstract 7978106 07 51-125 days 51 125 Female 10-18 0.554 0.086 0.32 0.35 0.251 0.051 0.168 0.045 0.061 0.356 0.302 0.024 0.167 0.146 0.127 0.265 0.171 0.428 0.14 0.488 0.112 12/20/2002 ETPREF10(%) 10%EtOHPref PR10E EtOH 0.1 RI-72 TJP p. 934, Fig.1 MRG 010202 with TJP from publication and data file 7978106.07 Locomotor response (photocell beam interruptions) to acute 2 g/kg i.p Ethanol injection; Day 3 (first Ethanol treatment) minus Day 2 (saline baseline) in the chronic EtOH group; 10 min activity test (Accuscan activity Monitor Grid test). Ethanol (EtOH) has both locomotor stimulant and locomotor ataxic effects. Repeated EtOH treatment can result in the development of behavioral sensitization (increased sensitivity) similar to that seen with the classical stimulant drugs amphetamine and cocaine. However, it has been suggested for EtOH that sensitization may be a by-product of the development of tolerance to the sedative/ataxic effects of EtOH. It is also possible that the converse is true: that tolerance develops as the result of sensitization development. We examined this notion by measuring EtOH sensitization and tolerance in the BXD/Ty recombinant inbred strains. Changes in locomotor activation and grid test ataxia were used as the measures of sensitization and tolerance, respectively. If a genetic relationship exists between sensitization and tolerance, then those strains most susceptible to sensitization should also develop the most robust tolerance. Genetic correlations did not support the presence of this relationship. In addition, the use of the BXD/Ty recombinant inbred strains enabled us to perform gene mapping by quantitative trait locus analysis for activity and ataxia measures. We found that 28% to 79% of the genetic variation in the various activity and ataxia responses could be explained by the identified quantitative trait loci associations. However, when associations of gene markers with behavioral phenotypes were compared, we obtained no strong evidence for common genes determining magnitude of sensitization and tolerance. Thus the results of this study do not support the hypothesis that sensitization results from development of tolerance to the sedative/ataxic effects of EtOH or, conversely, that tolerance is a by-product of sensitization. Phillips TJ, Lessov CN, Harland RD, Mitchell SR. Evaluation of potential genetic associations between ethanol tolerance and sensitization in BXD/Ty recombinant inbred mice J Pharmacol Exp Ther 277(2) 613-623 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627538&dopt=Abstract 8627538 01 Female -18 151 96 350 -227 -401 88 188 -128 353 79 78 -67 269 541 562 -117 -37 -44 241 608 -23 58 947 -142 -345 12/20/2002 ETACT2(GRIDCD) ACTD3D2 EtOH 2 g/kg RI-82 TJP p. 616, Fig 2 top MRG 010202 with TJP from publication and data file 8627538.01 Locomotor response (photocell beam interruptions) to acute 2 g/kg Ethanol injection (i.p); Day 11 (only Ethanol treatment) minus Day 2 (saline baseline) in the chronic saline (CS) group; 10 min activity test (Accuscan activity Monitor Grid test). Ethanol (EtOH) has both locomotor stimulant and locomotor ataxic effects. Repeated EtOH treatment can result in the development of behavioral sensitization (increased sensitivity) similar to that seen with the classical stimulant drugs amphetamine and cocaine. However, it has been suggested for EtOH that sensitization may be a by-product of the development of tolerance to the sedative/ataxic effects of EtOH. It is also possible that the converse is true: that tolerance develops as the result of sensitization development. We examined this notion by measuring EtOH sensitization and tolerance in the BXD/Ty recombinant inbred strains. Changes in locomotor activation and grid test ataxia were used as the measures of sensitization and tolerance, respectively. If a genetic relationship exists between sensitization and tolerance, then those strains most susceptible to sensitization should also develop the most robust tolerance. Genetic correlations did not support the presence of this relationship. In addition, the use of the BXD/Ty recombinant inbred strains enabled us to perform gene mapping by quantitative trait locus analysis for activity and ataxia measures. We found that 28% to 79% of the genetic variation in the various activity and ataxia responses could be explained by the identified quantitative trait loci associations. However, when associations of gene markers with behavioral phenotypes were compared, we obtained no strong evidence for common genes determining magnitude of sensitization and tolerance. Thus the results of this study do not support the hypothesis that sensitization results from development of tolerance to the sedative/ataxic effects of EtOH or, conversely, that tolerance is a by-product of sensitization. Phillips TJ, Lessov CN, Harland RD, Mitchell SR. Evaluation of potential genetic associations between ethanol tolerance and sensitization in BXD/Ty recombinant inbred mice J Pharmacol Exp Ther 277(2) 613-623 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627538&dopt=Abstract 8627538 02 Female -105 272 68 304 -426 -443 170 262 33 524 -68 3 -214 213 780 428 8 -23 79 247 687 -30 538 979 -13 -379 12/20/2002 ETACT2(GRIDCS) ACTD11D2 EtOH 2 g/kg RI-82 TJP p. 616, Fig 2 top inset MRG 010202 with TJP from publication and data file 8627538.02 Change in locomotor response (photocell beam interruptions) to 2 g/kg i.p EtOH injection (i.p) after repeated treatment; Day 11 (fifth EtOH treatment) minus Day 3 (first EtOH treatment) in the chronic drug (CD) group; 10 min activity test (Grid test inside Accuscan activity monitors). Ethanol (EtOH) has both locomotor stimulant and locomotor ataxic effects. Repeated EtOH treatment can result in the development of behavioral sensitization (increased sensitivity) similar to that seen with the classical stimulant drugs amphetamine and cocaine. However, it has been suggested for EtOH that sensitization may be a by-product of the development of tolerance to the sedative/ataxic effects of EtOH. It is also possible that the converse is true: that tolerance develops as the result of sensitization development. We examined this notion by measuring EtOH sensitization and tolerance in the BXD/Ty recombinant inbred strains. Changes in locomotor activation and grid test ataxia were used as the measures of sensitization and tolerance, respectively. If a genetic relationship exists between sensitization and tolerance, then those strains most susceptible to sensitization should also develop the most robust tolerance. Genetic correlations did not support the presence of this relationship. In addition, the use of the BXD/Ty recombinant inbred strains enabled us to perform gene mapping by quantitative trait locus analysis for activity and ataxia measures. We found that 28% to 79% of the genetic variation in the various activity and ataxia responses could be explained by the identified quantitative trait loci associations. However, when associations of gene markers with behavioral phenotypes were compared, we obtained no strong evidence for common genes determining magnitude of sensitization and tolerance. Thus the results of this study do not support the hypothesis that sensitization results from development of tolerance to the sedative/ataxic effects of EtOH or, conversely, that tolerance is a by-product of sensitization. Phillips TJ, Lessov CN, Harland RD, Mitchell SR. Evaluation of potential genetic associations between ethanol tolerance and sensitization in BXD/Ty recombinant inbred mice J Pharmacol Exp Ther2 277(2) 613-623 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627538&dopt=Abstract 8627538 03 Female 20 265 164 -238 254 214 121 395 201 516 119 210 386 482 234 136 234 360 98 548 -140 428 982 261 205 466 12/20/2002 ETSENS2(GRIDCD) ACTD11D3 EtOH 2 g/kg RI-82 TJP p. 616, Fig 2 bottom MRG 010202 with TJP from publication and data file 8627538.03 Acute Ethanol Ataxia: Grid test errors after acute 2 g/kg EtOH injection (i.p); Day 3 (first EtOH treatment) minus Day 2 (saline baseline) in the chronic drug (CD) group; 10 min test (Accuscan activity Monitor Grid test). Ethanol (EtOH) has both locomotor stimulant and locomotor ataxic effects. Repeated EtOH treatment can result in the development of behavioral sensitization (increased sensitivity) similar to that seen with the classical stimulant drugs amphetamine and cocaine. However, it has been suggested for EtOH that sensitization may be a by-product of the development of tolerance to the sedative/ataxic effects of EtOH. It is also possible that the converse is true: that tolerance develops as the result of sensitization development. We examined this notion by measuring EtOH sensitization and tolerance in the BXD/Ty recombinant inbred strains. Changes in locomotor activation and grid test ataxia were used as the measures of sensitization and tolerance, respectively. If a genetic relationship exists between sensitization and tolerance, then those strains most susceptible to sensitization should also develop the most robust tolerance. Genetic correlations did not support the presence of this relationship. In addition, the use of the BXD/Ty recombinant inbred strains enabled us to perform gene mapping by quantitative trait locus analysis for activity and ataxia measures. We found that 28% to 79% of the genetic variation in the various activity and ataxia responses could be explained by the identified quantitative trait loci associations. However, when associations of gene markers with behavioral phenotypes were compared, we obtained no strong evidence for common genes determining magnitude of sensitization and tolerance. Thus the results of this study do not support the hypothesis that sensitization results from development of tolerance to the sedative/ataxic effects of EtOH or, conversely, that tolerance is a by-product of sensitization. Phillips TJ, Lessov CN, Harland RD, Mitchell SR. Evaluation of potential genetic associations between ethanol tolerance and sensitization in BXD/Ty recombinant inbred mice J Pharmacol Exp Ther 277(2) 613-623 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627538&dopt=Abstract 8627538 04 Female 114 123 135 187 86 103 143 129 154 191 165 138 227 320 289 186 108 165 132 151 185 152 298 159 164 109 12/20/2002 ETGRID2(CD) ERRD3D2 EtOH 2 g/kg RI-82 TJP p. 616, Fig 1 top MRG 010202 with TJP from publication and data file 8627538.04 Acute Ethanol Ataxia: Grid test errors after acute 2 g/kg EtOH injection (i.p); Day 11 (only EtOH treatment) minus Day 2 (saline baseline) in the chronic saline (CS) group; 10 min test (Accuscan activity Monitor Grid test). Ethanol (EtOH) has both locomotor stimulant and locomotor ataxic effects. Repeated EtOH treatment can result in the development of behavioral sensitization (increased sensitivity) similar to that seen with the classical stimulant drugs amphetamine and cocaine. However, it has been suggested for EtOH that sensitization may be a by-product of the development of tolerance to the sedative/ataxic effects of EtOH. It is also possible that the converse is true: that tolerance develops as the result of sensitization development. We examined this notion by measuring EtOH sensitization and tolerance in the BXD/Ty recombinant inbred strains. Changes in locomotor activation and grid test ataxia were used as the measures of sensitization and tolerance, respectively. If a genetic relationship exists between sensitization and tolerance, then those strains most susceptible to sensitization should also develop the most robust tolerance. Genetic correlations did not support the presence of this relationship. In addition, the use of the BXD/Ty recombinant inbred strains enabled us to perform gene mapping by quantitative trait locus analysis for activity and ataxia measures. We found that 28% to 79% of the genetic variation in the various activity and ataxia responses could be explained by the identified quantitative trait loci associations. However, when associations of gene markers with behavioral phenotypes were compared, we obtained no strong evidence for common genes determining magnitude of sensitization and tolerance. Thus the results of this study do not support the hypothesis that sensitization results from development of tolerance to the sedative/ataxic effects of EtOH or, conversely, that tolerance is a by-product of sensitization. Phillips TJ, Lessov CN, Harland RD, Mitchell SR. Evaluation of potential genetic associations between ethanol tolerance and sensitization in BXD/Ty recombinant inbred mice J Pharmacol Exp Ther 277(2) 613-623 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627538&dopt=Abstract 8627538 05 Female 116 168 150 199 91 111 201 153 140 230 210 129 195 287 351 175 110 185 106 172 256 130 337 212 171 107 12/20/2002 ETGRID2(CS) ERRD11D2 EtOH 2 g/kg RI-82 TJP p. 616, Fig 1 top inset MRG 010202 with TJP from publication and data file 8627538.05 Change in misstep errors induced by repeated 2 g/kg EtOH injection (i.p); Day 11 (fifth EtOH treatment) minus Day 3 (first EtOH treatment) in the chronic drug (CD) group; 10 min test (Accuscan activity Monitor Grid test). Ethanol (EtOH) has both locomotor stimulant and locomotor ataxic effects. Repeated EtOH treatment can result in the development of behavioral sensitization (increased sensitivity) similar to that seen with the classical stimulant drugs amphetamine and cocaine. However, it has been suggested for EtOH that sensitization may be a by-product of the development of tolerance to the sedative/ataxic effects of EtOH. It is also possible that the converse is true: that tolerance develops as the result of sensitization development. We examined this notion by measuring EtOH sensitization and tolerance in the BXD/Ty recombinant inbred strains. Changes in locomotor activation and grid test ataxia were used as the measures of sensitization and tolerance, respectively. If a genetic relationship exists between sensitization and tolerance, then those strains most susceptible to sensitization should also develop the most robust tolerance. Genetic correlations did not support the presence of this relationship. In addition, the use of the BXD/Ty recombinant inbred strains enabled us to perform gene mapping by quantitative trait locus analysis for activity and ataxia measures. We found that 28% to 79% of the genetic variation in the various activity and ataxia responses could be explained by the identified quantitative trait loci associations. However, when associations of gene markers with behavioral phenotypes were compared, we obtained no strong evidence for common genes determining magnitude of sensitization and tolerance. Thus the results of this study do not support the hypothesis that sensitization results from development of tolerance to the sedative/ataxic effects of EtOH or, conversely, that tolerance is a by-product of sensitization. Phillips TJ, Lessov CN, Harland RD, Mitchell SR. Evaluation of potential genetic associations between ethanol tolerance and sensitization in BXD/Ty recombinant inbred mice J Pharmacol Exp Ther 277(2) 613-623 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627538&dopt=Abstract 8627538 06 Female -33 -40 33 -83 -13 -14 -18 -43 -40 64 -5 -13 -30 83 -34 -33 -10 -8 -69 -7 4 66 -63 -57 -24 47 12/20/2002 ETGRIDTOL2(CD) ERRD11D3 EtOH 2 g/kg RI-82 TJP p. 616, Fig 1 bottom MRG 010202 with TJP from publication and data file 8627538.06 Ataxia ratio (errors/activity counts) in the Grid test after acute 2 g/kg Ethanol injection (i.p); Day 3 (first Ethanol treatment) minus Day 2 (saline baseline) in the chronic drug (CD) group; 10 min test (Grid test inside Accuscan activity monitors). Ethanol (EtOH) has both locomotor stimulant and locomotor ataxic effects. Repeated EtOH treatment can result in the development of behavioral sensitization (increased sensitivity) similar to that seen with the classical stimulant drugs amphetamine and cocaine. However, it has been suggested for EtOH that sensitization may be a by-product of the development of tolerance to the sedative/ataxic effects of EtOH. It is also possible that the converse is true: that tolerance develops as the result of sensitization development. We examined this notion by measuring EtOH sensitization and tolerance in the BXD/Ty recombinant inbred strains. Changes in locomotor activation and grid test ataxia were used as the measures of sensitization and tolerance, respectively. If a genetic relationship exists between sensitization and tolerance, then those strains most susceptible to sensitization should also develop the most robust tolerance. Genetic correlations did not support the presence of this relationship. In addition, the use of the BXD/Ty recombinant inbred strains enabled us to perform gene mapping by quantitative trait locus analysis for activity and ataxia measures. We found that 28% to 79% of the genetic variation in the various activity and ataxia responses could be explained by the identified quantitative trait loci associations. However, when associations of gene markers with behavioral phenotypes were compared, we obtained no strong evidence for common genes determining magnitude of sensitization and tolerance. Thus the results of this study do not support the hypothesis that sensitization results from development of tolerance to the sedative/ataxic effects of EtOH or, conversely, that tolerance is a by-product of sensitization. Phillips TJ, Lessov CN, Harland RD, Mitchell SR. Evaluation of potential genetic associations between ethanol tolerance and sensitization in BXD/Ty recombinant inbred mice J Pharmacol Exp Ther 277(2) 613-623 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627538&dopt=Abstract 8627538 07 Female 17.6 11.4 14.8 20.8 18.1 25.2 18.5 14.9 17.6 18 19.7 17.7 47.6 26.4 22.9 14.5 19.8 26.3 33.7 14 14.3 24.4 16.9 9 29.9 24 12/20/2002 ETGRID2 (CD RATIO) RATD3D2 EtOH 2 g/kg RI-82 TJP p. 617, Fig 3 top MRG 010202 with TJP from publication and data file 8627538.07 Ataxia ratio (errors/activity counts) in the Grid test after acute 2 g/kg Ethanol injection (i.p); Day 11 (only EtOH treatment) minus Day 2 (saline baseline) in the chronic saline (CS) group; 10 min test (Accuscan activity Monitor Grid test). Ethanol (EtOH) has both locomotor stimulant and locomotor ataxic effects. Repeated EtOH treatment can result in the development of behavioral sensitization (increased sensitivity) similar to that seen with the classical stimulant drugs amphetamine and cocaine. However, it has been suggested for EtOH that sensitization may be a by-product of the development of tolerance to the sedative/ataxic effects of EtOH. It is also possible that the converse is true: that tolerance develops as the result of sensitization development. We examined this notion by measuring EtOH sensitization and tolerance in the BXD/Ty recombinant inbred strains. Changes in locomotor activation and grid test ataxia were used as the measures of sensitization and tolerance, respectively. If a genetic relationship exists between sensitization and tolerance, then those strains most susceptible to sensitization should also develop the most robust tolerance. Genetic correlations did not support the presence of this relationship. In addition, the use of the BXD/Ty recombinant inbred strains enabled us to perform gene mapping by quantitative trait locus analysis for activity and ataxia measures. We found that 28% to 79% of the genetic variation in the various activity and ataxia responses could be explained by the identified quantitative trait loci associations. However, when associations of gene markers with behavioral phenotypes were compared, we obtained no strong evidence for common genes determining magnitude of sensitization and tolerance. Thus the results of this study do not support the hypothesis that sensitization results from development of tolerance to the sedative/ataxic effects of EtOH or, conversely, that tolerance is a by-product of sensitization. Phillips TJ, Lessov CN, Harland RD, Mitchell SR. Evaluation of potential genetic associations between ethanol tolerance and sensitization in BXD/Ty recombinant inbred mice J Pharmacol Exp Ther 277(2) 613-623 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627538&dopt=Abstract 8627538 08 Female 15.9 14.7 14.3 19.9 26 27.5 22.7 18.2 15.1 18.1 26 17.5 47.5 24.5 24.5 16.1 17.4 27.3 27.1 17.9 18.5 22.1 17.6 11.1 32.7 22.9 12/20/2002 ETGRID2 (CS RATIO) RATD11D2 EtOH 2 g/kg RI-82 TJP p. 617, Fig 3 top inset MRG 010202 with TJP from publication and data file 8627538.08 Change in ataxic effects of 2 g/kg Ethanol injection (i.p) after repeated treatment; Day 11 (fifth EtOH treatment) minus Day 3 (first EtOH treatment) in the chronic drug (CD) group; 10 min test (Grid test inside Accuscan activity monitors). Ethanol (EtOH) has both locomotor stimulant and locomotor ataxic effects. Repeated EtOH treatment can result in the development of behavioral sensitization (increased sensitivity) similar to that seen with the classical stimulant drugs amphetamine and cocaine. However, it has been suggested for EtOH that sensitization may be a by-product of the development of tolerance to the sedative/ataxic effects of EtOH. It is also possible that the converse is true: that tolerance develops as the result of sensitization development. We examined this notion by measuring EtOH sensitization and tolerance in the BXD/Ty recombinant inbred strains. Changes in locomotor activation and grid test ataxia were used as the measures of sensitization and tolerance, respectively. If a genetic relationship exists between sensitization and tolerance, then those strains most susceptible to sensitization should also develop the most robust tolerance. Genetic correlations did not support the presence of this relationship. In addition, the use of the BXD/Ty recombinant inbred strains enabled us to perform gene mapping by quantitative trait locus analysis for activity and ataxia measures. We found that 28% to 79% of the genetic variation in the various activity and ataxia responses could be explained by the identified quantitative trait loci associations. However, when associations of gene markers with behavioral phenotypes were compared, we obtained no strong evidence for common genes determining magnitude of sensitization and tolerance. Thus the results of this study do not support the hypothesis that sensitization results from development of tolerance to the sedative/ataxic effects of EtOH or, conversely, that tolerance is a by-product of sensitization. Phillips TJ, Lessov CN, Harland RD, Mitchell SR. Evaluation of potential genetic associations between ethanol tolerance and sensitization in BXD/Ty recombinant inbred mice J Pharmacol Exp Ther 277(2) 613-623 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627538&dopt=Abstract 8627538 09 Female -6.9 -5.1 0.3 -8 -6.8 -11.2 -2.8 -8 -8.2 -1.3 -5.4 -5.3 -23.5 -0.6 -5.3 -3.8 -8.4 -10.2 -22.3 -5.8 0.8 -2.7 -8.6 -4.6 -12.4 -7.5 12/20/2002 ETGRIDTOL2 (CD RATIO) RATD11D3 EtOH 2 g/kg RI-82 TJP p. 617, Fig 3 bottom MRG 010202 with TJP from publication and data file 8627538.09 Baseline locomotor activity measured in the grid test (photocell beam interruptions); activity on the second day (Day 2) of exposure to the testing procedure after saline injection (i.p); 10 min activity test (Accuscan Activity Monitor Grid test). [data from all mice, regardless of subsequent treatment designation, are included in the calculation of these means.] Ethanol (EtOH) has both locomotor stimulant and locomotor ataxic effects. Repeated EtOH treatment can result in the development of behavioral sensitization (increased sensitivity) similar to that seen with the classical stimulant drugs amphetamine and cocaine. However, it has been suggested for EtOH that sensitization may be a by-product of the development of tolerance to the sedative/ataxic effects of EtOH. It is also possible that the converse is true: that tolerance develops as the result of sensitization development. We examined this notion by measuring EtOH sensitization and tolerance in the BXD/Ty recombinant inbred strains. Changes in locomotor activation and grid test ataxia were used as the measures of sensitization and tolerance, respectively. If a genetic relationship exists between sensitization and tolerance, then those strains most susceptible to sensitization should also develop the most robust tolerance. Genetic correlations did not support the presence of this relationship. In addition, the use of the BXD/Ty recombinant inbred strains enabled us to perform gene mapping by quantitative trait locus analysis for activity and ataxia measures. We found that 28% to 79% of the genetic variation in the various activity and ataxia responses could be explained by the identified quantitative trait loci associations. However, when associations of gene markers with behavioral phenotypes were compared, we obtained no strong evidence for common genes determining magnitude of sensitization and tolerance. Thus the results of this study do not support the hypothesis that sensitization results from development of tolerance to the sedative/ataxic effects of EtOH or, conversely, that tolerance is a by-product of sensitization. Phillips TJ, Lessov CN, Harland RD, Mitchell SR. Evaluation of potential genetic associations between ethanol tolerance and sensitization in BXD/Ty recombinant inbred mice J Pharmacol Exp Ther 277(2) 613-623 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627538&dopt=Abstract 8627538 10 Female 825 877 975 795 756 873 705 641 1040 725 971 766 621 967 762 721 700 790 510 813 762 645 1596 814 693 887 12/20/2002 SALACT(GRID10MIN) TACTD2 Saline 0.009 RI-82 TJP Tables 2, 3, 4, 5 MRG 010202 with TJP from publication and data file 8627538.1 Baseline locomotor activity (distance traveled); indexed as activity on the second day (Day 2) of exposure to the activity testing procedure after saline injection (ip); strain means are for a 15 min activity test (Accuscan activity monitors); data from all mice, regardless of subsequent treatment designation, are included in the calculation of these means [cm] Sensitization to the psychostimulant effects of cocaine has received widespread attention because concomitant changes occur in neurochemical pathways that are part of the brain reward pathway. The current study was undertaken with the purpose of mapping genes determining sensitivity to the acute stimulant and sensitizing effects of cocaine. Sensitivity and sensitization to cocaine (5, 10, and 40 mg/kg) were measured in 25 BXD/Ty recombinant inbred (BXD RI) strains and the progenitor C57BL/6J (B6) and DBA/2J (D2) strains. Quantitative trait locus (QTL) mapping provisionally localized cocaine sensitivity genes to regions on all chromosomes except 6, 11, 17, and X; sensitization QTLs were localized to chromosomes 1-10, 13, 15, 18, 19, and X. Provisional QTLs for locomotion after saline injection in a novel setting were mapped to chromosomes 1, 3-6, 9, 12, 13, 18, and 19 and in a familiar setting to chromosomes 4-7, 9, 13, and 19. There were both common and unique QTL regions across the phenotypes. Evidence for a genetic association between magnitude of acute cocaine response and sensitization was obtained for only the 10 mg/kg dose. Some common QTL regions for cocaine, ethanol, and methamphetamine responses suggest the possibility that these drugs induce stimulant effects or sensitization through some common mechanisms. However, independent mechanisms were also indicated. Many candidate genes reside near the provisional QTLs mapped for cocaine responses, including genes coding a variety of neurotransmitter and hormone receptors. These data, once confirmed, should prove useful for directing investigations of acute and chronic cocaine effects down already suspected and novel avenues. Phillips TJ, Huson MG, McKinnon CS. Localization of genes mediating acute and sensitized locomotor responses to cocaine in BXD/Ty recombinant inbred mice J Neurosci 18(8) 3023-3034 Apr 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9526019&dopt=Abstract 9526019 01 52-131 days 52 131 Female 7-13 cm 2826.817 83 2799.718 112 3664.41 206 2743.583 88 2678.948 450 2617.875 125 2099.213 31 4694.203 144 1362.016 56 3449.317 111 2847.36 103 3622.441 100 3085.517 137 1983.133 159 4519.183 147 3043.587 275 2886.951 69 2093.051 147 2820.622 133 1630.075 108 2906.806 116 2545.333 147 1674.5 94 5521.39 194 3115.333 88 2654.052 127 3486.719 107 6/4/2003 MK Sullivan SALACT(15MIN) BASACT BASED2 Saline 0.9% or 10 ml/kg RI-86 TJP p. 3026, Fig 1 inset. MRG 121301 by Fig 1 inset, p. 3026 Basal Activity 9526019.01 Locomotor response (distance traveled) to an acute 5 mg/kg cocaine injection (ip); indexed as Day 3 (first cocaine treatment) minus Day 2 (saline baseline) in the chronic drug (CD) group; strain means are for a 15 min activity test (Accuscan activity monitors) [cm] Sensitization to the psychostimulant effects of cocaine has received widespread attention because concomitant changes occur in neurochemical pathways that are part of the brain reward pathway. The current study was undertaken with the purpose of mapping genes determining sensitivity to the acute stimulant and sensitizing effects of cocaine. Sensitivity and sensitization to cocaine (5, 10, and 40 mg/kg) were measured in 25 BXD/Ty recombinant inbred (BXD RI) strains and the progenitor C57BL/6J (B6) and DBA/2J (D2) strains. Quantitative trait locus (QTL) mapping provisionally localized cocaine sensitivity genes to regions on all chromosomes except 6, 11, 17, and X; sensitization QTLs were localized to chromosomes 1-10, 13, 15, 18, 19, and X. Provisional QTLs for locomotion after saline injection in a novel setting were mapped to chromosomes 1, 3-6, 9, 12, 13, 18, and 19 and in a familiar setting to chromosomes 4-7, 9, 13, and 19. There were both common and unique QTL regions across the phenotypes. Evidence for a genetic association between magnitude of acute cocaine response and sensitization was obtained for only the 10 mg/kg dose. Some common QTL regions for cocaine, ethanol, and methamphetamine responses suggest the possibility that these drugs induce stimulant effects or sensitization through some common mechanisms. However, independent mechanisms were also indicated. Many candidate genes reside near the provisional QTLs mapped for cocaine responses, including genes coding a variety of neurotransmitter and hormone receptors. These data, once confirmed, should prove useful for directing investigations of acute and chronic cocaine effects down already suspected and novel avenues. Phillips TJ, Huson MG, McKinnon CS. Localization of genes mediating acute and sensitized locomotor responses to cocaine in BXD/Ty recombinant inbred mice J Neurosci 18(8) 3023-3034 Apr 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9526019&dopt=Abstract 9526019 94 52-131 days 52 131 Female 7-13 cm 1297.667 118 2004 261 2726.25 632 2301 211 412.6 253 4.692 43 1229.417 85 3147.417 396 -468.417 0 1689.25 329 1944.4 211 2009.083 337 916.25 144 52.385 177 3776.455 674 2880.231 76 2212.25 539 745.5 0 1521.429 0 -139.818 0 1853.667 716 141.385 144 1411.231 286 571.364 505 1223.25 573 1440.364 808 317.6 640 6/4/2003 MK Sullivan COCACT5(CD) ACCD5 COCAC5 Cocaine 5 mg/kg RI-86 TJP p. 3026, Fig 1 bottom. JD 121301 from file 9526019.94 Locomotor response (distance traveled) to an acute 10 mg/kg cocaine injection (ip); indexed as Day 3 (first cocaine treatment) minus Day 2 (saline baseline) in the chronic drug (CD) group; strain means are for a 15 min activity test (Accuscan activity monitors) [cm] Sensitization to the psychostimulant effects of cocaine has received widespread attention because concomitant changes occur in neurochemical pathways that are part of the brain reward pathway. The current study was undertaken with the purpose of mapping genes determining sensitivity to the acute stimulant and sensitizing effects of cocaine. Sensitivity and sensitization to cocaine (5, 10, and 40 mg/kg) were measured in 25 BXD/Ty recombinant inbred (BXD RI) strains and the progenitor C57BL/6J (B6) and DBA/2J (D2) strains. Quantitative trait locus (QTL) mapping provisionally localized cocaine sensitivity genes to regions on all chromosomes except 6, 11, 17, and X; sensitization QTLs were localized to chromosomes 1-10, 13, 15, 18, 19, and X. Provisional QTLs for locomotion after saline injection in a novel setting were mapped to chromosomes 1, 3-6, 9, 12, 13, 18, and 19 and in a familiar setting to chromosomes 4-7, 9, 13, and 19. There were both common and unique QTL regions across the phenotypes. Evidence for a genetic association between magnitude of acute cocaine response and sensitization was obtained for only the 10 mg/kg dose. Some common QTL regions for cocaine, ethanol, and methamphetamine responses suggest the possibility that these drugs induce stimulant effects or sensitization through some common mechanisms. However, independent mechanisms were also indicated. Many candidate genes reside near the provisional QTLs mapped for cocaine responses, including genes coding a variety of neurotransmitter and hormone receptors. These data, once confirmed, should prove useful for directing investigations of acute and chronic cocaine effects down already suspected and novel avenues. Phillips TJ, Huson MG, McKinnon CS. Localization of genes mediating acute and sensitized locomotor responses to cocaine in BXD/Ty recombinant inbred mice J Neurosci 18(8) 3023-3034 Apr 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9526019&dopt=Abstract 9526019 02 52-131 days 52 131 Female 7-13 cm 2961.25 690 3386.929 782 8506.818 1261 4132.167 817 3241 652 3306.25 730 3463.417 913 5637.167 843 1755.692 817 7339 1252 3957.9 565 3418.667 548 3078.091 904 99.667 357 5716.333 791 7159.5 1261 5805.083 1122 5342.25 1504 5091.125 957 1101.545 604 4192.417 877 4569.417 1608 2988.667 609 3540.615 939 5187.231 635 4367.273 565 5093.091 1043 6/4/2003 MK Sullivan COCACT10(CD) ACCD10 COCAC10 Cocaine 10 mg/kg RI-86 TJP p. 3026, Fig 1 top. JD 121301 from file 9526019.02 Locomotor response (distance traveled) to an acute 40 mg/kg cocaine injection (ip); indexed as Day 3 (first cocaine treatment) minus Day 2 (saline baseline) in the chronic drug (CD) group; strain means are for a 15 min activity test (Accuscan activity monitors) [cm] Sensitization to the psychostimulant effects of cocaine has received widespread attention because concomitant changes occur in neurochemical pathways that are part of the brain reward pathway. The current study was undertaken with the purpose of mapping genes determining sensitivity to the acute stimulant and sensitizing effects of cocaine. Sensitivity and sensitization to cocaine (5, 10, and 40 mg/kg) were measured in 25 BXD/Ty recombinant inbred (BXD RI) strains and the progenitor C57BL/6J (B6) and DBA/2J (D2) strains. Quantitative trait locus (QTL) mapping provisionally localized cocaine sensitivity genes to regions on all chromosomes except 6, 11, 17, and X; sensitization QTLs were localized to chromosomes 1-10, 13, 15, 18, 19, and X. Provisional QTLs for locomotion after saline injection in a novel setting were mapped to chromosomes 1, 3-6, 9, 12, 13, 18, and 19 and in a familiar setting to chromosomes 4-7, 9, 13, and 19. There were both common and unique QTL regions across the phenotypes. Evidence for a genetic association between magnitude of acute cocaine response and sensitization was obtained for only the 10 mg/kg dose. Some common QTL regions for cocaine, ethanol, and methamphetamine responses suggest the possibility that these drugs induce stimulant effects or sensitization through some common mechanisms. However, independent mechanisms were also indicated. Many candidate genes reside near the provisional QTLs mapped for cocaine responses, including genes coding a variety of neurotransmitter and hormone receptors. These data, once confirmed, should prove useful for directing investigations of acute and chronic cocaine effects down already suspected and novel avenues. Phillips TJ, Huson MG, McKinnon CS. Localization of genes mediating acute and sensitized locomotor responses to cocaine in BXD/Ty recombinant inbred mice J Neurosci 18(8) 3023-3034 Apr 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9526019&dopt=Abstract 9526019 03 52-131 days 52 131 Female 7-13 cm 12932.833 758 12608.867 1238 15426.923 1592 14007.667 994 4837 733 12578.385 935 8107.417 1684 13238.75 1238 7105.692 1322 10082.538 1297 7614.1 893 8616.091 775 6817.5 1347 5307.417 1288 12385.667 935 14297.75 1625 10363.333 931 12060.889 1709 13099.286 3671 2832.9 707 7053 1263 14651.727 1120 10958.462 1625 11884.25 1213 8294.154 1811 15252.917 640 10339.917 1432 6/4/2003 MK Sullivan COCACT40(CD) ACCD40 COCAC40 Cocaine 40 mg/kg RI-86 TJP p. 3026, Fig 1 bottom. JD 121301 from file 9526019.03 Cocaine induced sensitization of locomotor response (distance traveled) to 5 daily 5 mg/kg cocaine injections (i.p); Day 11 (fifth cocaine treatment) minus Day 3 (first cocaine treatment); 15 min activity test (Accuscan activity monitors) [cm] [NOTE: Highlighted mean was reported incorrectly in the cited publication; it is correct in this table. All QTL analyses and genetic correlations were reported correctly in the cited publication: 'Phillips, Huson, McKinnon, 1998 JNeurosci 18: 3023-3034] Sensitization to the psychostimulant effects of cocaine has received widespread attention because concomitant changes occur in neurochemical pathways that are part of the brain reward pathway. The current study was undertaken with the purpose of mapping genes determining sensitivity to the acute stimulant and sensitizing effects of cocaine. Sensitivity and sensitization to cocaine (5, 10, and 40 mg/kg) were measured in 25 BXD/Ty recombinant inbred (BXD RI) strains and the progenitor C57BL/6J (B6) and DBA/2J (D2) strains. Quantitative trait locus (QTL) mapping provisionally localized cocaine sensitivity genes to regions on all chromosomes except 6, 11, 17, and X; sensitization QTLs were localized to chromosomes 1-10, 13, 15, 18, 19, and X. Provisional QTLs for locomotion after saline injection in a novel setting were mapped to chromosomes 1, 3-6, 9, 12, 13, 18, and 19 and in a familiar setting to chromosomes 4-7, 9, 13, and 19. There were both common and unique QTL regions across the phenotypes. Evidence for a genetic association between magnitude of acute cocaine response and sensitization was obtained for only the 10 mg/kg dose. Some common QTL regions for cocaine, ethanol, and methamphetamine responses suggest the possibility that these drugs induce stimulant effects or sensitization through some common mechanisms. However, independent mechanisms were also indicated. Many candidate genes reside near the provisional QTLs mapped for cocaine responses, including genes coding a variety of neurotransmitter and hormone receptors. These data, once confirmed, should prove useful for directing investigations of acute and chronic cocaine effects down already suspected and novel avenues. Phillips TJ, Huson MG, McKinnon CS. Localization of genes mediating acute and sensitized locomotor responses to cocaine in BXD/Ty recombinant inbred mice J Neurosci 18(8) 3023-3034 Apr 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9526019&dopt=Abstract 9526019 93 52-131 days 52 131 Female 7-13 cm 3395.417 839 3456.857 779 3015.25 1940 1590 854 1287.444 742 1901.923 667 1616.5 419 3988.667 719 1729.25 816 1232.5 779 2971.5 382 1963.636 479 644.25 547 1597.231 577 630.455 903 3115.231 188 1851.833 921 1931.125 1258 3096.714 816 1753.182 442 2246.25 861 4200.308 995 3825.538 1131 1217.455 841 3591.333 839 1692.818 712 4256.778 779 6/4/2003 MK Sullivan COCSEN5(CD) deltaCD5 COCSEN5 Cocaine 5 mg/kg RI-86 TJP p.3027, Fig 2 JD 121301 from publication 9526019.93 Cocaine induced sensitization of locomotor response (distance traveled) to 5 daily 10 mg/kg cocaine injections(ip); indexed as Day 11 (fifth cocaine treatment) minus Day 3 (first cocaine treatment); 15 min activity test (Accuscan activity monitors) [cm] Sensitization to the psychostimulant effects of cocaine has received widespread attention because concomitant changes occur in neurochemical pathways that are part of the brain reward pathway. The current study was undertaken with the purpose of mapping genes determining sensitivity to the acute stimulant and sensitizing effects of cocaine. Sensitivity and sensitization to cocaine (5, 10, and 40 mg/kg) were measured in 25 BXD/Ty recombinant inbred (BXD RI) strains and the progenitor C57BL/6J (B6) and DBA/2J (D2) strains. Quantitative trait locus (QTL) mapping provisionally localized cocaine sensitivity genes to regions on all chromosomes except 6, 11, 17, and X; sensitization QTLs were localized to chromosomes 1-10, 13, 15, 18, 19, and X. Provisional QTLs for locomotion after saline injection in a novel setting were mapped to chromosomes 1, 3-6, 9, 12, 13, 18, and 19 and in a familiar setting to chromosomes 4-7, 9, 13, and 19. There were both common and unique QTL regions across the phenotypes. Evidence for a genetic association between magnitude of acute cocaine response and sensitization was obtained for only the 10 mg/kg dose. Some common QTL regions for cocaine, ethanol, and methamphetamine responses suggest the possibility that these drugs induce stimulant effects or sensitization through some common mechanisms. However, independent mechanisms were also indicated. Many candidate genes reside near the provisional QTLs mapped for cocaine responses, including genes coding a variety of neurotransmitter and hormone receptors. These data, once confirmed, should prove useful for directing investigations of acute and chronic cocaine effects down already suspected and novel avenues. Phillips TJ, Huson MG, McKinnon CS. Localization of genes mediating acute and sensitized locomotor responses to cocaine in BXD/Ty recombinant inbred mice J Neurosci 18(8) 3023-3034 Apr 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9526019&dopt=Abstract 9526019 04 52-131 days 52 131 Female 7-13 cm 3823 839 4570.714 644 6091.364 2548 2503.727 1030 3704.727 1184 6180 951 2812.917 1487 4479.333 1294 1517.231 1040 1760.833 1110 4708 925 3883.5 782 3864.5 1026 893.083 419 3789 921 8423.75 653 5866.083 1041 4600 2382 2285.5 1086 2925.818 404 4008.583 1491 5286.583 2494 4198.75 1139 -1518.923 1108 2158 1169 3725.273 813 4234.818 1063 6/4/2003 MK Sullivan COCSEN10(CD) deltaCD10 COCSEN10 Cocaine 10 mg/kg RI-86 TJP p.3027, Fig 2 JD 121301 from publication 9526019.04 Cocaine induced sensitization of locomotor response (distance traveled) to 5 daily 40 mg/kg cocaine injections (ip); indexed as Day 11 (fifth cocaine treatment) minus Day 3 (first cocaine treatment) distance traveled (in cm); 15 min activity test (Accuscan activity monitors) [cm] Sensitization to the psychostimulant effects of cocaine has received widespread attention because concomitant changes occur in neurochemical pathways that are part of the brain reward pathway. The current study was undertaken with the purpose of mapping genes determining sensitivity to the acute stimulant and sensitizing effects of cocaine. Sensitivity and sensitization to cocaine (5, 10, and 40 mg/kg) were measured in 25 BXD/Ty recombinant inbred (BXD RI) strains and the progenitor C57BL/6J (B6) and DBA/2J (D2) strains. Quantitative trait locus (QTL) mapping provisionally localized cocaine sensitivity genes to regions on all chromosomes except 6, 11, 17, and X; sensitization QTLs were localized to chromosomes 1-10, 13, 15, 18, 19, and X. Provisional QTLs for locomotion after saline injection in a novel setting were mapped to chromosomes 1, 3-6, 9, 12, 13, 18, and 19 and in a familiar setting to chromosomes 4-7, 9, 13, and 19. There were both common and unique QTL regions across the phenotypes. Evidence for a genetic association between magnitude of acute cocaine response and sensitization was obtained for only the 10 mg/kg dose. Some common QTL regions for cocaine, ethanol, and methamphetamine responses suggest the possibility that these drugs induce stimulant effects or sensitization through some common mechanisms. However, independent mechanisms were also indicated. Many candidate genes reside near the provisional QTLs mapped for cocaine responses, including genes coding a variety of neurotransmitter and hormone receptors. These data, once confirmed, should prove useful for directing investigations of acute and chronic cocaine effects down already suspected and novel avenues. Phillips TJ, Huson MG, McKinnon CS. Localization of genes mediating acute and sensitized locomotor responses to cocaine in BXD/Ty recombinant inbred mice J Neurosci 18(8) 3023-3034 Apr 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9526019&dopt=Abstract 9526019 05 52-131 days 52 131 Female 7-13 cm -1069.333 1367 1470.4 1709 5966.538 2300 -2287.75 1441 4268.083 1252 1017.154 1108 3505.167 1929 2721.333 2071 872.615 1940 -4245.615 1650 7010.8 1476 993.364 1175 471.5 2017 3670.333 2127 3281.25 1976 5300.333 2182 3580.833 1086 -2874.444 2408 2053.143 5161 4624.7 1236 -2123.308 1700 -3130.7 1805 2830.692 1536 -283.833 1124 4110.538 2840 2393.417 1022 3420.25 2060 6/4/2003 MK Sullivan COCSEN40(CD) deltaCD40 COCSEN40 Cocaine 40 mg/kg RI-86 TJP p.3027, Fig 2 JD 121301 from publication 9526019.05 Locomotor response (distance traveled in cm) to 20% 2-hydroxypropyl-beta-cyclodextrin vehicle injection (ip); indexed as Day 3 (third vehicle treatment) minus Day 2 (vehicle baseline) in the vehicle control group; strain means are for a 30 min activity test (Accuscan activity monitors). Allopregnanolone is a neuroactive steroid that, like ethanol (EtOH), has stimulant, anxiolytic, ataxic, and depressant effects. Two experiments tested the hypothesis that sensitivity to the locomotor stimulant effects of these drugs is influenced by a common set of genes. Sensitivity to the locomotor stimulant effects of allopregnanolone was determined in 24 BXD recombinant inbred (RI) strains. Strain means were positively correlated with extant means for EtOH stimulation in 20 of the same strains. Quantitative trait locus (QTL) analysis provisionally identified many loci, including several known to influence sensitivity to EtOH. Sensitivity to allopregnanolone was also measured in FAST and SLOW mice, which were selectively bred for differential locomotor response to EtOH, to determine whether selection has also altered allopregnanolone sensitivity. FAST mice were more sensitive to the stimulant effects of allopregnanolone compared with SLOW mice. These data suggest that sensitivity to the locomotor stimulant effects of these drugs is influenced by common genes. Palmer AA, Miller MN, McKinnon CS, Phillips TJ Sensitivity to the locomotor stimulant effects of ethanol and allopregnanolone is influenced by common genes Behav Neurosci 116(1) 126-137 Feb 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11895174&dopt=Abstract 11895174 01 50-123 days 50 123 Female 10-27 cm -88.04762268 479.78 -640.5999756 319.13 -321.125 416.39 -1170.300049 159.02 -1008.166687 412.57 -1589.119995 461.75 -174.1538391 278.69 -816 798.09 -483.9285583 300.01 -923.833313 274.59 -25.81818199 366.12 -1479.083374 300.02 -1180.153809 805.46 -207.9166718 551.37 -535.6153564 560.38 276.0666809 327.32 -408.7692261 456.56 -408.6923218 284.70 -204.5 415.85 -1464.230713 289.62 285.2142944 356.56 -521.4615479 260.11 -1958.199951 566.12 -312.615387 294.54 -524.4615479 258.20 -620.2272949 358.47 6/23/2003 MK Sullivan VEHACT(30MIN) ALLO-0 Allopregnanolone 0mg/kg RI-163 TJP/AAP p.129, Fig 1 MRG and AAP 02/06/02 11895174.01 Locomotor response (distance traveled in cm) to 10 mg/kg allopregnanolone (3a-hydroxy-5a-pregnan-20-one, THP) in 20% 2-hydroxypropyl-beta-cyclodextrin vehicle injection (ip); indexed as Day 3 (first allopregnanolone treatment) minus Day 2 (vehicle baseline); strain means are for a 30 min activity test (Accuscan activity monitors). Allopregnanolone is a neuroactive steroid that, like ethanol (EtOH), has stimulant, anxiolytic, ataxic, and depressant effects. Two experiments tested the hypothesis that sensitivity to the locomotor stimulant effects of these drugs is influenced by a common set of genes. Sensitivity to the locomotor stimulant effects of allopregnanolone was determined in 24 BXD recombinant inbred (RI) strains. Strain means were positively correlated with extant means for EtOH stimulation in 20 of the same strains. Quantitative trait locus (QTL) analysis provisionally identified many loci, including several known to influence sensitivity to EtOH. Sensitivity to allopregnanolone was also measured in FAST and SLOW mice, which were selectively bred for differential locomotor response to EtOH, to determine whether selection has also altered allopregnanolone sensitivity. FAST mice were more sensitive to the stimulant effects of allopregnanolone compared with SLOW mice. These data suggest that sensitivity to the locomotor stimulant effects of these drugs is influenced by common genes. Palmer AA, Miller MN, McKinnon CS, Phillips TJ Sensitivity to the locomotor stimulant effects of ethanol and allopregnanolone is influenced by common genes Behav Neurosci 116(1) 126-137 Feb 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11895174&dopt=Abstract 11895174 02 50-123 days 50 123 Female 10-27 cm 3477.600098 805.79 3019.899902 519.83 598.4666748 781.82 2017.666626 730.58 846.3076782 785.08 1093.136353 445.45 1020 379.34 1203.588257 1160.33 674 549.59 1166.058838 702.48 1419.272705 495.45 1484.75 644.63 1831.769287 645.04 3109.764648 1121.90 1081.692261 533.88 2940.642822 752.89 994.916687 772.31 1652.583374 479.34 337.0909119 523.97 523.6923218 582.64 801.7142944 353.72 1036.230713 379.34 1559 873.97 11 398.76 393.6666565 355.79 694.458313 534.30 6/23/2003 MK Sullivan ALLOACT10 ALLO-10 Allopregnanolone 10mg/kg RI-163 TJP/AAP p.129, Fig 1 MRG and AAP 02/06/02 11895174.02 Locomotor response (distance traveled in cm) to 17 mg/kg allopregnanolone (3a-hydroxy-5a-pregnan-20-one) in 20% 2-hydroxypropyl-beta-cyclodextrin vehicle injection (ip); indexed as Day 3 (first allopregnanolone treatment) minus Day 2 (vehicle baseline); strain means are for a 30 min activity test (Accuscan activity monitors). Allopregnanolone is a neuroactive steroid that, like ethanol (EtOH), has stimulant, anxiolytic, ataxic, and depressant effects. Two experiments tested the hypothesis that sensitivity to the locomotor stimulant effects of these drugs is influenced by a common set of genes. Sensitivity to the locomotor stimulant effects of allopregnanolone was determined in 24 BXD recombinant inbred (RI) strains. Strain means were positively correlated with extant means for EtOH stimulation in 20 of the same strains. Quantitative trait locus (QTL) analysis provisionally identified many loci, including several known to influence sensitivity to EtOH. Sensitivity to allopregnanolone was also measured in FAST and SLOW mice, which were selectively bred for differential locomotor response to EtOH, to determine whether selection has also altered allopregnanolone sensitivity. FAST mice were more sensitive to the stimulant effects of allopregnanolone compared with SLOW mice. These data suggest that sensitivity to the locomotor stimulant effects of these drugs is influenced by common genes. Palmer AA, Miller MN, McKinnon CS, Phillips TJ Sensitivity to the locomotor stimulant effects of ethanol and allopregnanolone is influenced by common genes Behav Neurosci 116(1) 126-137 Feb 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11895174&dopt=Abstract 11895174 03 50-123 days 50 123 Female 10-27 cm 2414.730703 681.74 5722.411621 908.71 2639.666748 1427.39 4524.90918 1020.75 2317.923096 732.37 3171.173828 763.49 3867.769287 945.64 3759.9375 1386.72 4051 1248.13 3099.882324 598.34 2904.916748 900.03 2294.166748 924.90 3454.230713 743.57 4645.222168 1361.00 5758.307617 1327.80 5285.5 1641.08 4636.692383 1079.67 3529.083252 788.38 3781 1045.64 4282.143066 1526.97 6489.571289 1573.44 428.1666565 542.74 5010.5 1568.46 6124.307617 1369.71 2913.083252 968.46 4020.407471 622.41 6/23/2003 MK Sullivan ALLOACT17 ALLO-17 Allopregnanolone 17mg/kg RI-163 TJP/AAP p.129, Fig 1 MRG and AAP 02/06/02 11895174.03 Ethanol acceptance - Ratio relative to water (within mouse) Alcohol Acceptance Ratio; ratio of ethanol intake (ml) on test day to average water intake (ml) measured on first two days Male mice of parent inbred strains C57BL/6J and DBA/2J, and mice from several of the BXD/Ty Recombinant Inbred (RI) strains derived from the cross of the parent inbred strains were tested for responsiveness to ethanol. Separate groups of mice from these strains were characterized for sensitivity to ethanol's effects to increase activity in an open field and to induce ambulatory ataxia in the grid test. The strain distribution pattern of the RI strains indicated polygenic control of both responses to ethanol. Other mice from this battery were tested for acceptance of an ethanol solution, a measure related to preference drinking. This trait may be substantially influenced by a single gene. Mice were then rendered physically dependent on ethanol through inhalation of ethanol vapor for three days. Severity of handling-induced convulsions was used to index the severity of the ethanol withdrawal syndrome. The distribution of the RI strains indicated possible influence of a major gene on ethanol withdrawal severity. Crabbe JC, Kosobud A, Young ER, Janowsky JS. Polygenic and single-gene determination of responses to ethanol in BXD/Ty recombinant inbred mouse strains Neurobehav Toxicol Teratol 5(2) 181-187 Mar-Apr 1983 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6683363&dopt=Abstract 6683363 01 Male 0.75 0.29 0.44 1.09 0.07 0.53 0.67 0.67 0.34 0.49 0.73 0.66 0.5 0.82 0.44 0.08 0.04 0.63 0.18 12/20/2002 ETACC10 ACCRATIO ACCRATIO EtOH 10% EtOH JCC p. 184, Table 2 JD 020502 from publication 6683363.01 Ethanol acceptance - Total ethanol intake [g/kg] Male mice of parent inbred strains C57BL/6J and DBA/2J, and mice from several of the BXD/Ty Recombinant Inbred (RI) strains derived from the cross of the parent inbred strains were tested for responsiveness to ethanol. Separate groups of mice from these strains were characterized for sensitivity to ethanol's effects to increase activity in an open field and to induce ambulatory ataxia in the grid test. The strain distribution pattern of the RI strains indicated polygenic control of both responses to ethanol. Other mice from this battery were tested for acceptance of an ethanol solution, a measure related to preference drinking. This trait may be substantially influenced by a single gene. Mice were then rendered physically dependent on ethanol through inhalation of ethanol vapor for three days. Severity of handling-induced convulsions was used to index the severity of the ethanol withdrawal syndrome. The distribution of the RI strains indicated possible influence of a major gene on ethanol withdrawal severity. Crabbe JC, Kosobud A, Young ER, Janowsky JS. Polygenic and single-gene determination of responses to ethanol in BXD/Ty recombinant inbred mouse strains Neurobehav Toxicol Teratol 5(2) 181-187 Mar-Apr 1983 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6683363&dopt=Abstract 6683363 02 Male 12.6 3.36 3.52 9.95 1.32 10.89 13.34 8.9 8.29 7.65 9.34 10.21 12.66 10.78 2.43 1.03 0.68 4.81 2.34 12/20/2002 ETCONS10 ETINTAKE ETINTAKE EtOH 10% EtOH ( v/v) JCC p. 184, Table 2 MRG 120601 from publication 6683363.02 Saline open Field Activity - beam interruptions after saline administration Male mice of parent inbred strains C57BL/6J and DBA/2J, and mice from several of the BXD/Ty Recombinant Inbred (RI) strains derived from the cross of the parent inbred strains were tested for responsiveness to ethanol. Separate groups of mice from these strains were characterized for sensitivity to ethanol's effects to increase activity in an open field and to induce ambulatory ataxia in the grid test. The strain distribution pattern of the RI strains indicated polygenic control of both responses to ethanol. Other mice from this battery were tested for acceptance of an ethanol solution, a measure related to preference drinking. This trait may be substantially influenced by a single gene. Mice were then rendered physically dependent on ethanol through inhalation of ethanol vapor for three days. Severity of handling-induced convulsions was used to index the severity of the ethanol withdrawal syndrome. The distribution of the RI strains indicated possible influence of a major gene on ethanol withdrawal severity. Crabbe JC, Kosobud A, Young ER, Janowsky JS. Polygenic and single-gene determination of responses to ethanol in BXD/Ty recombinant inbred mouse strains Neurobehav Toxicol Teratol 5(2) 181-187 Mar-Apr 1983 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6683363&dopt=Abstract 6683363 03 Male 155 132 175 182 240 152 113 79 141 127 152 104 158 131 166 171 159 125 134 89 171 95 12/20/2002 SALACT OFA OFACTIV Saline JCC p. 184, Table 1 MRG 120601 from publication 6683363.03 Ethanol open field activity - beam interruptions after EtOH administration Male mice of parent inbred strains C57BL/6J and DBA/2J, and mice from several of the BXD/Ty Recombinant Inbred (RI) strains derived from the cross of the parent inbred strains were tested for responsiveness to ethanol. Separate groups of mice from these strains were characterized for sensitivity to ethanol's effects to increase activity in an open field and to induce ambulatory ataxia in the grid test. The strain distribution pattern of the RI strains indicated polygenic control of both responses to ethanol. Other mice from this battery were tested for acceptance of an ethanol solution, a measure related to preference drinking. This trait may be substantially influenced by a single gene. Mice were then rendered physically dependent on ethanol through inhalation of ethanol vapor for three days. Severity of handling-induced convulsions was used to index the severity of the ethanol withdrawal syndrome. The distribution of the RI strains indicated possible influence of a major gene on ethanol withdrawal severity. Crabbe JC, Kosobud A, Young ER, Janowsky JS. Polygenic and single-gene determination of responses to ethanol in BXD/Ty recombinant inbred mouse strains Neurobehav Toxicol Teratol 5(2) 181-187 Mar-Apr 1983 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6683363&dopt=Abstract 6683363 04 Male 83 335 264 155 178 144 171 133 317 121 245 117 252 150 268 251 204 154 187 170 226 233 12/20/2002 ACT1.3 ETOFA ETACTIV EtOH 1.33 g/kg JCC p. 184, Table 1 JD 020502 from publication 6683363.04 Ethanol open field activity - difference relative to saline EtOH Effect on Open field activity. Activity (beam interruptions) in 4 min (day 2 - day 1) or (ETOFA - OFA) Male mice of parent inbred strains C57BL/6J and DBA/2J, and mice from several of the BXD/Ty Recombinant Inbred (RI) strains derived from the cross of the parent inbred strains were tested for responsiveness to ethanol. Separate groups of mice from these strains were characterized for sensitivity to ethanol's effects to increase activity in an open field and to induce ambulatory ataxia in the grid test. The strain distribution pattern of the RI strains indicated polygenic control of both responses to ethanol. Other mice from this battery were tested for acceptance of an ethanol solution, a measure related to preference drinking. This trait may be substantially influenced by a single gene. Mice were then rendered physically dependent on ethanol through inhalation of ethanol vapor for three days. Severity of handling-induced convulsions was used to index the severity of the ethanol withdrawal syndrome. The distribution of the RI strains indicated possible influence of a major gene on ethanol withdrawal severity. Crabbe JC, Kosobud A, Young ER, Janowsky JS. Polygenic and single-gene determination of responses to ethanol in BXD/Ty recombinant inbred mouse strains Neurobehav Toxicol Teratol 5(2) 181-187 Mar-Apr 1983 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6683363&dopt=Abstract 6683363 05 Male -72 203 89 -27 -62 -8 58 54 176 -6 93 13 94 19 102 80 45 29 53 81 55 138 12/20/2002 ETACT1.33(delta) ACT ETDELTOF EtOH 1.33 g/kg JCC p. 184, Table 1 MRG 120601 from publication 6683363.05 Ethanol induced ataxia, Errors/run on grid test, 2 min - 10 min post-EtOH injection Male mice of parent inbred strains C57BL/6J and DBA/2J, and mice from several of the BXD/Ty Recombinant Inbred (RI) strains derived from the cross of the parent inbred strains were tested for responsiveness to ethanol. Separate groups of mice from these strains were characterized for sensitivity to ethanol's effects to increase activity in an open field and to induce ambulatory ataxia in the grid test. The strain distribution pattern of the RI strains indicated polygenic control of both responses to ethanol. Other mice from this battery were tested for acceptance of an ethanol solution, a measure related to preference drinking. This trait may be substantially influenced by a single gene. Mice were then rendered physically dependent on ethanol through inhalation of ethanol vapor for three days. Severity of handling-induced convulsions was used to index the severity of the ethanol withdrawal syndrome. The distribution of the RI strains indicated possible influence of a major gene on ethanol withdrawal severity. Crabbe JC, Kosobud A, Young ER, Janowsky JS. Polygenic and single-gene determination of responses to ethanol in BXD/Ty recombinant inbred mouse strains Neurobehav Toxicol Teratol 5(2) 181-187 Mar-Apr 1983 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6683363&dopt=Abstract 6683363 06 Male 2.58 1.84 1.66 2.4 2.28 5.43 3.18 2.25 1.84 2.5 12/20/2002 ETGRID2.5 GT ETGRID EtOH 2.5 g/kg JCC p. 185, Table 3 MRG 120601 from publication 6683363.06 Chronic ethanol withdrawal - handling induced convulsion, 1.5 g/kg loading dose and 68.1mg/kg pyrazole; 15 hr area under curve Male mice of parent inbred strains C57BL/6J and DBA/2J, and mice from several of the BXD/Ty Recombinant Inbred (RI) strains derived from the cross of the parent inbred strains were tested for responsiveness to ethanol. Separate groups of mice from these strains were characterized for sensitivity to ethanol's effects to increase activity in an open field and to induce ambulatory ataxia in the grid test. The strain distribution pattern of the RI strains indicated polygenic control of both responses to ethanol. Other mice from this battery were tested for acceptance of an ethanol solution, a measure related to preference drinking. This trait may be substantially influenced by a single gene. Mice were then rendered physically dependent on ethanol through inhalation of ethanol vapor for three days. Severity of handling-induced convulsions was used to index the severity of the ethanol withdrawal syndrome. The distribution of the RI strains indicated possible influence of a major gene on ethanol withdrawal severity. Crabbe JC, Kosobud A, Young ER, Janowsky JS. Polygenic and single-gene determination of responses to ethanol in BXD/Ty recombinant inbred mouse strains Neurobehav Toxicol Teratol 5(2) 181-187 Mar-Apr 1983 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6683363&dopt=Abstract 6683363 07 Male 14.5 29 34.5 23.75 21.13 22.83 16 7.5 32.5 25.33 12/26/2002 ETHIC(VAP) WDR AREA EtOH Varied vapor conc Exp1 JCC p. 185, Table 4 MRG 021502 from publication 6683363.07 Chronic ethanol withdrawal - handling induced convulsion, 1.5 g/kg loading dose and 68.1mg/kg pyrazole; 15 hr area under curve Male mice of parent inbred strains C57BL/6J and DBA/2J, and mice from several of the BXD/Ty Recombinant Inbred (RI) strains derived from the cross of the parent inbred strains were tested for responsiveness to ethanol. Separate groups of mice from these strains were characterized for sensitivity to ethanol's effects to increase activity in an open field and to induce ambulatory ataxia in the grid test. The strain distribution pattern of the RI strains indicated polygenic control of both responses to ethanol. Other mice from this battery were tested for acceptance of an ethanol solution, a measure related to preference drinking. This trait may be substantially influenced by a single gene. Mice were then rendered physically dependent on ethanol through inhalation of ethanol vapor for three days. Severity of handling-induced convulsions was used to index the severity of the ethanol withdrawal syndrome. The distribution of the RI strains indicated possible influence of a major gene on ethanol withdrawal severity. Crabbe JC, Kosobud A, Young ER, Janowsky JS. Polygenic and single-gene determination of responses to ethanol in BXD/Ty recombinant inbred mouse strains Neurobehav Toxicol Teratol 5(2) 181-187 Mar-Apr 1983 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6683363&dopt=Abstract 6683363 08 Male 28.3 29.83 11.83 41.3 25.88 11.75 15 28.17 35.3 5 12/20/2002 ETHIC(VAP) WDR AREA EtOH Varied vapor conc Exp2 JCC p. 185, Table 4 MRG 021502 from publication 6683363.08 Chronic ethanol withdrawal - handling induced convulsion, 1.5 g/kg loading dose and 68.1mg/kg pyrazole; 15 hr area under curve Male mice of parent inbred strains C57BL/6J and DBA/2J, and mice from several of the BXD/Ty Recombinant Inbred (RI) strains derived from the cross of the parent inbred strains were tested for responsiveness to ethanol. Separate groups of mice from these strains were characterized for sensitivity to ethanol's effects to increase activity in an open field and to induce ambulatory ataxia in the grid test. The strain distribution pattern of the RI strains indicated polygenic control of both responses to ethanol. Other mice from this battery were tested for acceptance of an ethanol solution, a measure related to preference drinking. This trait may be substantially influenced by a single gene. Mice were then rendered physically dependent on ethanol through inhalation of ethanol vapor for three days. Severity of handling-induced convulsions was used to index the severity of the ethanol withdrawal syndrome. The distribution of the RI strains indicated possible influence of a major gene on ethanol withdrawal severity. Crabbe JC, Kosobud A, Young ER, Janowsky JS. Polygenic and single-gene determination of responses to ethanol in BXD/Ty recombinant inbred mouse strains Neurobehav Toxicol Teratol 5(2) 181-187 Mar-Apr 1983 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6683363&dopt=Abstract 6683363 09 Male 11.83 28 19.43 13.64 8 22.75 7.5 9.83 4 23.67 12/20/2002 ETHIC(VAP) WDR AREA EtOH Varied vapor conc Exp3 JCC p. 185, Table 4 MRG 021502 from publication 6683363.09 Ethanol hypothermic sensitivity 2 g/kg [degrees C] [1) Initial report given in Crabbe, Belknap, Mitchell, Crawshaw, 1994 JPET 269:184-192. 2) QTL analyses performed as described in Crabbe, Phillips, Gallaher, Crawshaw, Mitchell, 1996 JPET 277: 624-632 3) For the '96 paper, data for additional strains were added and some additional mice. Complete data set for the '96 paper is presented here in this database] Sensitivity and tolerance to ethanol-induced ataxia and hypothermia are determined in part by genetic factors; some genes that affect one of these traits may affect others as well. To test this general hypothesis, we examined hypothermia and two tests of ataxia in the C57BL/6J and DBA/2J inbred mouse stains and in 18 to 25 of their recombinant inbred strains. Genetic correlations among strain mean responses revealed strong positive associations of genetic origin between sensitivity and tolerance for each of the three responses. Furthermore, tolerance to grid test ataxia and tolerance to hypothermia were positively associated. Sensitivity scores across the three responses were uncorrelated. The second method employed to assess genetic correlation was to examine the pattern of genetic locations of quantitative trait loci (QTLs) provisionally identified using genetic mapping procedures. This method identified 3 to 14 QTLs associated with each trait. Within each response, a number of these associations were in common for measures of sensitivity and tolerance; this suggests the existence of several specific genes that exert pleiotropic effects on sensitivity and tolerance. In a result consistent with the analyses of genetic correlations, there was modest evidence for QTLs associated across measures. Some QTLs associated with multiple traits mapped to chromosomal regions where candidate genes (e.g., genes for neurotransmitter receptors) have been mapped. In summary, the analyses presented suggest modest commonality of genetic influence on tolerance to some measures of ataxia and hypothermia, and they strongly support previous data indicating that sensitivity and tolerance to specific effects of ethanol share common genetic determinants. Crabbe JC, Phillips TJ, Gallaher EJ, Crawshaw LI, Mitchell SR. Common genetic determinants of the ataxic and hypothermic effects of ethanol in BXD/Ty recombinant inbred mice: genetic correlations and quantitative trait loci. J Pharmacol Exp Ther 277(2) 184-192 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627539&dopt=Abstract 8627539 92 Female degree C -2 -1.628 -1.153 -1.344 -2.374 -2.255 -1.231 -2.642 -0.594 -1.27 -1.296 -1.617 -0.875 -0.853 -1.439 -1.038 -1.394 -1.631 -1.328 -1.861 -0.877 -1.096 -1.908 -0.602 -1.492 12/26/2002 ETTEMP2 HT2 AVED1E2 EtOH 2 g/kg RI-50 JCC JRS 2/11/00 from data file 8627539.92 Ethanol hypothermic sensitivity 3 g/kg [degrees C] [1) Initial report given in Crabbe, Belknap, Mitchell, Crawshaw, 1994 JPET 269:184-192. 2) QTL analyses performed as described in Crabbe, Phillips, Gallaher, Crawshaw, Mitchell, 1996 JPET 277: 624-632 3) For the '96 paper, data for additional strains were added and some additional mice. Complete data set for the '96 paper is presented here in this database] Sensitivity and tolerance to ethanol-induced ataxia and hypothermia are determined in part by genetic factors; some genes that affect one of these traits may affect others as well. To test this general hypothesis, we examined hypothermia and two tests of ataxia in the C57BL/6J and DBA/2J inbred mouse stains and in 18 to 25 of their recombinant inbred strains. Genetic correlations among strain mean responses revealed strong positive associations of genetic origin between sensitivity and tolerance for each of the three responses. Furthermore, tolerance to grid test ataxia and tolerance to hypothermia were positively associated. Sensitivity scores across the three responses were uncorrelated. The second method employed to assess genetic correlation was to examine the pattern of genetic locations of quantitative trait loci (QTLs) provisionally identified using genetic mapping procedures. This method identified 3 to 14 QTLs associated with each trait. Within each response, a number of these associations were in common for measures of sensitivity and tolerance; this suggests the existence of several specific genes that exert pleiotropic effects on sensitivity and tolerance. In a result consistent with the analyses of genetic correlations, there was modest evidence for QTLs associated across measures. Some QTLs associated with multiple traits mapped to chromosomal regions where candidate genes (e.g., genes for neurotransmitter receptors) have been mapped. In summary, the analyses presented suggest modest commonality of genetic influence on tolerance to some measures of ataxia and hypothermia, and they strongly support previous data indicating that sensitivity and tolerance to specific effects of ethanol share common genetic determinants. Crabbe JC, Phillips TJ, Gallaher EJ, Crawshaw LI, Mitchell SR. Common genetic determinants of the ataxic and hypothermic effects of ethanol in BXD/Ty recombinant inbred mice: genetic correlations and quantitative trait loci. J Pharmacol Exp Ther 277(2) 624-632 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627539&dopt=Abstract 8627539 91 Female degree C -3.1 -1.601 -2.083 -2.467 -3.174 -2.904 -1.797 -3.331 -1.008 -2.921 -2.583 -1.733 -2.528 -1.909 -2.225 -2.654 -1.793 -3.167 -1.856 -2.386 -3.146 -2.192 -2.449 -1.595 -2.363 12/26/2002 ETTEMP3 HT3 AVED1E3 EtOH 3 g/kg RI-50 JCC JRS 2/11/00 from data file 8627539.91 Ethanol hypothermic sensitivity 4 g/kg [degrees C] [1) Initial report given in Crabbe, Belknap, Mitchell, Crawshaw, 1994 JPET 269:184-192. 2) QTL analyses performed as described in Crabbe, Phillips, Gallaher, Crawshaw, Mitchell, 1996 JPET 277: 624-632 3) For the '96 paper, data for additional strains were added and some additional mice. Complete data set for the '96 paper is presented here in this database] Sensitivity and tolerance to ethanol-induced ataxia and hypothermia are determined in part by genetic factors; some genes that affect one of these traits may affect others as well. To test this general hypothesis, we examined hypothermia and two tests of ataxia in the C57BL/6J and DBA/2J inbred mouse stains and in 18 to 25 of their recombinant inbred strains. Genetic correlations among strain mean responses revealed strong positive associations of genetic origin between sensitivity and tolerance for each of the three responses. Furthermore, tolerance to grid test ataxia and tolerance to hypothermia were positively associated. Sensitivity scores across the three responses were uncorrelated. The second method employed to assess genetic correlation was to examine the pattern of genetic locations of quantitative trait loci (QTLs) provisionally identified using genetic mapping procedures. This method identified 3 to 14 QTLs associated with each trait. Within each response, a number of these associations were in common for measures of sensitivity and tolerance; this suggests the existence of several specific genes that exert pleiotropic effects on sensitivity and tolerance. In a result consistent with the analyses of genetic correlations, there was modest evidence for QTLs associated across measures. Some QTLs associated with multiple traits mapped to chromosomal regions where candidate genes (e.g., genes for neurotransmitter receptors) have been mapped. In summary, the analyses presented suggest modest commonality of genetic influence on tolerance to some measures of ataxia and hypothermia, and they strongly support previous data indicating that sensitivity and tolerance to specific effects of ethanol share common genetic determinants. Crabbe JC, Phillips TJ, Gallaher EJ, Crawshaw LI, Mitchell SR. Common genetic determinants of the ataxic and hypothermic effects of ethanol in BXD/Ty recombinant inbred mice: genetic correlations and quantitative trait loci. J Pharmacol Exp Ther 277(2) 624-632 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627539&dopt=Abstract 8627539 90 Female degree C -3.96 -2.934 -2.233 -2.528 -3.651 -3.479 -2.109 -3.467 -1.514 -2.979 -3.73 -3.9 -3.323 -1.826 -2.71 -2.549 -2.742 -2.769 -2.403 -2.067 -4.285 -2.312 -2.922 -2.101 -3.086 12/26/2002 ETTEMP4 HT4 AVED1E4 EtOH 4 g/kg RI-50 JCC JRS 2/11/00 from data file 8627539.9 Hypothermia tolerance (positive scores) or sensitization(negative scores) 2 g/kg ethanol, day 3 - day 1 [degrees C] [1) Initial report given in Crabbe, Belknap, Mitchell, Crawshaw, 1994 JPET 269:184-192. 2) QTL analyses performed as described in Crabbe, Phillips, Gallaher, Crawshaw, Mitchell, 1996 JPET 277: 624-632 3) For the '96 paper, data for additional strains were added and some additional mice. Complete data set for the '96 paper is presented here in this database] Sensitivity and tolerance to ethanol-induced ataxia and hypothermia are determined in part by genetic factors; some genes that affect one of these traits may affect others as well. To test this general hypothesis, we examined hypothermia and two tests of ataxia in the C57BL/6J and DBA/2J inbred mouse stains and in 18 to 25 of their recombinant inbred strains. Genetic correlations among strain mean responses revealed strong positive associations of genetic origin between sensitivity and tolerance for each of the three responses. Furthermore, tolerance to grid test ataxia and tolerance to hypothermia were positively associated. Sensitivity scores across the three responses were uncorrelated. The second method employed to assess genetic correlation was to examine the pattern of genetic locations of quantitative trait loci (QTLs) provisionally identified using genetic mapping procedures. This method identified 3 to 14 QTLs associated with each trait. Within each response, a number of these associations were in common for measures of sensitivity and tolerance; this suggests the existence of several specific genes that exert pleiotropic effects on sensitivity and tolerance. In a result consistent with the analyses of genetic correlations, there was modest evidence for QTLs associated across measures. Some QTLs associated with multiple traits mapped to chromosomal regions where candidate genes (e.g., genes for neurotransmitter receptors) have been mapped. In summary, the analyses presented suggest modest commonality of genetic influence on tolerance to some measures of ataxia and hypothermia, and they strongly support previous data indicating that sensitivity and tolerance to specific effects of ethanol share common genetic determinants. Crabbe JC, Phillips TJ, Gallaher EJ, Crawshaw LI, Mitchell SR. Common genetic determinants of the ataxic and hypothermic effects of ethanol in BXD/Ty recombinant inbred mice: genetic correlations and quantitative trait loci. J Pharmacol Exp Ther 277(2) 624-632 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627539&dopt=Abstract 8627539 89 Female degree C -0.495 -0.564 -0.014 -0.225 -0.035 -0.692 -0.103 -0.408 -0.008 -2.17 -0.252 -0.597 -0.019 0.053 0.189 -0.153 -0.066 0.503 0.161 -0.295 0.108 0.424 -0.752 -0.019 -0.444 12/26/2002 ETTEMPTOL2 TOL2 DDAV13E2 EtOH 2 g/kg RI-50 JCC JRS 2/11/00 from data file 8627539.89 Hypothermia tolerance (positive scores) or sensitization(negative scores) 3 g/kg ethanol, day 3 - day 1 [degrees C] [1) Initial report given in Crabbe, Belknap, Mitchell, Crawshaw, 1994 JPET 269:184-192. 2) QTL analyses performed as described in Crabbe, Phillips, Gallaher, Crawshaw, Mitchell, 1996 JPET 277: 624-632 3) For the '96 paper, data for additional strains were added and some additional mice. Complete data set for the '96 paper is presented here in this database] Sensitivity and tolerance to ethanol-induced ataxia and hypothermia are determined in part by genetic factors; some genes that affect one of these traits may affect others as well. To test this general hypothesis, we examined hypothermia and two tests of ataxia in the C57BL/6J and DBA/2J inbred mouse stains and in 18 to 25 of their recombinant inbred strains. Genetic correlations among strain mean responses revealed strong positive associations of genetic origin between sensitivity and tolerance for each of the three responses. Furthermore, tolerance to grid test ataxia and tolerance to hypothermia were positively associated. Sensitivity scores across the three responses were uncorrelated. The second method employed to assess genetic correlation was to examine the pattern of genetic locations of quantitative trait loci (QTLs) provisionally identified using genetic mapping procedures. This method identified 3 to 14 QTLs associated with each trait. Within each response, a number of these associations were in common for measures of sensitivity and tolerance; this suggests the existence of several specific genes that exert pleiotropic effects on sensitivity and tolerance. In a result consistent with the analyses of genetic correlations, there was modest evidence for QTLs associated across measures. Some QTLs associated with multiple traits mapped to chromosomal regions where candidate genes (e.g., genes for neurotransmitter receptors) have been mapped. In summary, the analyses presented suggest modest commonality of genetic influence on tolerance to some measures of ataxia and hypothermia, and they strongly support previous data indicating that sensitivity and tolerance to specific effects of ethanol share common genetic determinants. Crabbe JC, Phillips TJ, Gallaher EJ, Crawshaw LI, Mitchell SR. Common genetic determinants of the ataxic and hypothermic effects of ethanol in BXD/Ty recombinant inbred mice: genetic correlations and quantitative trait loci. J Pharmacol Exp Ther 277(2) 624-632 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627539&dopt=Abstract 8627539 88 Female degree C -0.907 0.058 -0.316 -0.569 0.023 -0.439 -0.181 -0.687 0.003 -0.697 -0.164 0.1 -0.991 -0.338 -0.366 -0.759 0.727 -0.178 1.122 -0.505 -0.492 -5.13 -0.179 -0.464 -0.229 12/26/2002 ETTEMPTOL3 TOL3 DDAV13E3 EtOH 3 g/kg RI-50 JCC JRS 2/11/00 from data file 8627539.88 Hypothermia tolerance (positive scores) or sensitization(negative scores) 4 g/kg ethanol, day 3 - day 1 [degrees C] [1) Initial report given in Crabbe, Belknap, Mitchell, Crawshaw, 1994 JPET 269:184-192. 2) QTL analyses performed as described in Crabbe, Phillips, Gallaher, Crawshaw, Mitchell, 1996 JPET 277: 624-632 3) For the '96 paper, data for additional strains were added and some additional mice. Complete data set for the '96 paper is presented here in this database] Sensitivity and tolerance to ethanol-induced ataxia and hypothermia are determined in part by genetic factors; some genes that affect one of these traits may affect others as well. To test this general hypothesis, we examined hypothermia and two tests of ataxia in the C57BL/6J and DBA/2J inbred mouse stains and in 18 to 25 of their recombinant inbred strains. Genetic correlations among strain mean responses revealed strong positive associations of genetic origin between sensitivity and tolerance for each of the three responses. Furthermore, tolerance to grid test ataxia and tolerance to hypothermia were positively associated. Sensitivity scores across the three responses were uncorrelated. The second method employed to assess genetic correlation was to examine the pattern of genetic locations of quantitative trait loci (QTLs) provisionally identified using genetic mapping procedures. This method identified 3 to 14 QTLs associated with each trait. Within each response, a number of these associations were in common for measures of sensitivity and tolerance; this suggests the existence of several specific genes that exert pleiotropic effects on sensitivity and tolerance. In a result consistent with the analyses of genetic correlations, there was modest evidence for QTLs associated across measures. Some QTLs associated with multiple traits mapped to chromosomal regions where candidate genes (e.g., genes for neurotransmitter receptors) have been mapped. In summary, the analyses presented suggest modest commonality of genetic influence on tolerance to some measures of ataxia and hypothermia, and they strongly support previous data indicating that sensitivity and tolerance to specific effects of ethanol share common genetic determinants. Crabbe JC, Phillips TJ, Gallaher EJ, Crawshaw LI, Mitchell SR. Common genetic determinants of the ataxic and hypothermic effects of ethanol in BXD/Ty recombinant inbred mice: genetic correlations and quantitative trait loci. J Pharmacol Exp Ther 277(2) 624-632 May 1996 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627539&dopt=Abstract 8627539 87 Female degree C -0.78 -0.922 0.097 -0.354 -0.679 -0.863 0.136 -0.025 -0.356 -0.363 -0.667 -1.278 -1.139 0.108 -0.465 -0.559 -0.5 -0.343 0.444 -0.6 0.722 -0.573 -0.381 -1.031 -0.972 12/26/2002 ETTEMPTOL4 TOL4 DDAV13E4 EtOH 4 g/kg RI-50 JCC JRS 2/11/00 from data file 8627539.87 Baseline Temp (C) for Day 1 before Quinpirole injection Acute sensitivity and tolerance to quinpirole (a dopamine mimetic with selectivity for D(2)/D(3) dopamine receptors) were evaluated in the C57BL/6J and DBA/2J inbred strains of mice, 24 of their BXD recombinant inbred strains, and 233 F(2) mice. Baseline locomotor activity, locomotor activity following 0.03 mg/kg quinpirole (and 0. 01 mg/kg in BXD mice), body temperature following 1 mg/kg quinpirole, and hypothermic tolerance following 2 or 3 days of quinpirole administration were evaluated. Quantitative trait locus (QTL) analysis was employed to identify genetic determinants of baseline locomotor activity and five behavioral responses to quinpirole. We examined correlated allelic variation in genetic markers of known chromosomal location with variation in each of these phenotypes. We definitively mapped a QTL on Chromosome (Chr) 9 linked to the D(2) dopamine receptor gene, Drd2, for hypothermic sensitivity to quinpirole, and identify a suggestive QTL in the same chromosomal region for tolerance to quinpirole after repeated treatments. Suggestive QTLs were also identified on Chr 19 for sensitivity and tolerance to quinpirole-induced hypothermia and for baseline locomotor activity; on Chr 15 for locomotor sensitivity to quinpirole; and on Chr 13 and 5 for baseline locomotor activity. Our results indicate that genetic differences in quinpirole sensitivity and tolerance are associated with QTLs near Drd2, and that baseline locomotor activity is associated with a suggestive QTL in proximity to the dopamine transporter gene Dat1. These data suggest that the genes influencing locomotor activity, dopamine mimetic sensitivity, and tolerance do not overlap completely. Buck K, Lischka T, Dorow J, Crabbe J. Mapping quantitative trait loci that regulate sensitivity and tolerance to quinpirole, a dopamine mimetic selective for D(2)/D(3) receptors Amer J Med Genet 96(5) 696-705 Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11054779&dopt=Abstract 11054779 01 10-14 wks 70 98 Female 38.711 38.687 38.851 38.724 38.69 39.37 38.721 39.227 38.958 38.581 38.645 38.565 38.369 38.192 38.247 39.009 39.074 38.79 38.453 39.183 38.67 38.7 39.449 38.46 38.168 39.068 12/20/2002 NULTEMP BASET BASECD1 Quinpirole 1mg/kg RI-69 JCC JD 121901 from data file 11054779.01 Hypothermia measured 60 min after quinpirole administration on day 1; change from baseline temperature [degrees C] Acute sensitivity and tolerance to quinpirole (a dopamine mimetic with selectivity for D(2)/D(3) dopamine receptors) were evaluated in the C57BL/6J and DBA/2J inbred strains of mice, 24 of their BXD recombinant inbred strains, and 233 F(2) mice. Baseline locomotor activity, locomotor activity following 0.03 mg/kg quinpirole (and 0. 01 mg/kg in BXD mice), body temperature following 1 mg/kg quinpirole, and hypothermic tolerance following 2 or 3 days of quinpirole administration were evaluated. Quantitative trait locus (QTL) analysis was employed to identify genetic determinants of baseline locomotor activity and five behavioral responses to quinpirole. We examined correlated allelic variation in genetic markers of known chromosomal location with variation in each of these phenotypes. We definitively mapped a QTL on Chromosome (Chr) 9 linked to the D(2) dopamine receptor gene, Drd2, for hypothermic sensitivity to quinpirole, and identify a suggestive QTL in the same chromosomal region for tolerance to quinpirole after repeated treatments. Suggestive QTLs were also identified on Chr 19 for sensitivity and tolerance to quinpirole-induced hypothermia and for baseline locomotor activity; on Chr 15 for locomotor sensitivity to quinpirole; and on Chr 13 and 5 for baseline locomotor activity. Our results indicate that genetic differences in quinpirole sensitivity and tolerance are associated with QTLs near Drd2, and that baseline locomotor activity is associated with a suggestive QTL in proximity to the dopamine transporter gene Dat1. These data suggest that the genes influencing locomotor activity, dopamine mimetic sensitivity, and tolerance do not overlap completely. Buck K, Lischka T, Dorow J, Crabbe J. Mapping quantitative trait loci that regulate sensitivity and tolerance to quinpirole, a dopamine mimetic selective for D(2)/D(3) receptors Amer J Med Genet 96(5) 696-705 Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11054779&dopt=Abstract 11054779 02 10-14 wks 70 98 Female degrees C -1.622 0.200 -5.043 0.243 -3.847 0.296 -1.144 0.210 -3.634 0.252 -4.746 0.390 -4.374 0.343 -1.224 0.157 -2.074 0.152 -0.874 0.233 -2.673 0.204 -1.127 0.091 -2.798 0.273 -1.573 0.314 -6.465 0.324 -3.295 0.272 -1.781 0.181 -3.488 0.309 -2.557 0.168 -2.4 0.271 -3.615 0.305 -6.767 0.590 -2.089 0.195 -3.831 0.315 -1.115 0.117 -3.967 0.258 7/1/2003 MK Sullivan QPTEMP1 HT60 DEL60D1 Quinpirole 1mg/kg RI-69 JCC p. 700, Fig 2a JD 121901 from data file 11054779.02 Tolerance to quinpirole induced hypothermia on day 2 as compared to day 1 [degrees C] Acute sensitivity and tolerance to quinpirole (a dopamine mimetic with selectivity for D(2)/D(3) dopamine receptors) were evaluated in the C57BL/6J and DBA/2J inbred strains of mice, 24 of their BXD recombinant inbred strains, and 233 F(2) mice. Baseline locomotor activity, locomotor activity following 0.03 mg/kg quinpirole (and 0. 01 mg/kg in BXD mice), body temperature following 1 mg/kg quinpirole, and hypothermic tolerance following 2 or 3 days of quinpirole administration were evaluated. Quantitative trait locus (QTL) analysis was employed to identify genetic determinants of baseline locomotor activity and five behavioral responses to quinpirole. We examined correlated allelic variation in genetic markers of known chromosomal location with variation in each of these phenotypes. We definitively mapped a QTL on Chromosome (Chr) 9 linked to the D(2) dopamine receptor gene, Drd2, for hypothermic sensitivity to quinpirole, and identify a suggestive QTL in the same chromosomal region for tolerance to quinpirole after repeated treatments. Suggestive QTLs were also identified on Chr 19 for sensitivity and tolerance to quinpirole-induced hypothermia and for baseline locomotor activity; on Chr 15 for locomotor sensitivity to quinpirole; and on Chr 13 and 5 for baseline locomotor activity. Our results indicate that genetic differences in quinpirole sensitivity and tolerance are associated with QTLs near Drd2, and that baseline locomotor activity is associated with a suggestive QTL in proximity to the dopamine transporter gene Dat1. These data suggest that the genes influencing locomotor activity, dopamine mimetic sensitivity, and tolerance do not overlap completely. Buck K, Lischka T, Dorow J, Crabbe J. Mapping quantitative trait loci that regulate sensitivity and tolerance to quinpirole, a dopamine mimetic selective for D(2)/D(3) receptors Amer J Med Genet 96(5) 696-705 Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11054779&dopt=Abstract 11054779 03 10-14 wks 70 98 Female degrees C -0.242 -0.735 -0.918 -0.18 -1.153 -1.407 -1.184 -0.34 -0.056 -0.202 -0.386 0.03 -0.768 -0.636 -2.019 -0.754 -0.542 -1.215 -0.457 -0.692 -0.688 -2.167 -0.461 -1.024 -0.226 -1.718 QPTEMPTOL1(D2) HT TOL2 TOL60D12 Quinpirole 1mg/kg RI-69 JCC JD 121901 from data file 11054779.03 Tolerance to quinpirole induced hypothermia on day 3 as compared to day 1 [degrees (C)] Acute sensitivity and tolerance to quinpirole (a dopamine mimetic with selectivity for D(2)/D(3) dopamine receptors) were evaluated in the C57BL/6J and DBA/2J inbred strains of mice, 24 of their BXD recombinant inbred strains, and 233 F(2) mice. Baseline locomotor activity, locomotor activity following 0.03 mg/kg quinpirole (and 0. 01 mg/kg in BXD mice), body temperature following 1 mg/kg quinpirole, and hypothermic tolerance following 2 or 3 days of quinpirole administration were evaluated. Quantitative trait locus (QTL) analysis was employed to identify genetic determinants of baseline locomotor activity and five behavioral responses to quinpirole. We examined correlated allelic variation in genetic markers of known chromosomal location with variation in each of these phenotypes. We definitively mapped a QTL on Chromosome (Chr) 9 linked to the D(2) dopamine receptor gene, Drd2, for hypothermic sensitivity to quinpirole, and identify a suggestive QTL in the same chromosomal region for tolerance to quinpirole after repeated treatments. Suggestive QTLs were also identified on Chr 19 for sensitivity and tolerance to quinpirole-induced hypothermia and for baseline locomotor activity; on Chr 15 for locomotor sensitivity to quinpirole; and on Chr 13 and 5 for baseline locomotor activity. Our results indicate that genetic differences in quinpirole sensitivity and tolerance are associated with QTLs near Drd2, and that baseline locomotor activity is associated with a suggestive QTL in proximity to the dopamine transporter gene Dat1. These data suggest that the genes influencing locomotor activity, dopamine mimetic sensitivity, and tolerance do not overlap completely. Buck K, Lischka T, Dorow J, Crabbe J. Mapping quantitative trait loci that regulate sensitivity and tolerance to quinpirole, a dopamine mimetic selective for D(2)/D(3) receptors Amer J Med Genet 96(5) 696-705 Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11054779&dopt=Abstract 11054779 04 10-14 wks 70 98 Female degrees C -0.758 0.158 -1.652 0.262 -1.472 0.214 -0.262 0.177 -2.213 0.205 -2.151 0.328 -1.412 0.295 -0.636 0.214 -0.234 0.159 -0.139 0.162 -0.978 0.199 -0.296 0.150 -1.374 0.270 -1.015 0.214 -3.181 0.402 -1.102 0.266 -0.936 0.193 -1.321 0.208 -1.038 0.167 -0.575 0.243 -0.528 0.281 -2.867 0.476 -1.222 0.178 -0.569 0.210 -0.390 0.121 -2.197 0.223 7/2/2003 MK Sullivan QPTEMPTOL1(D3) HT TOL3 TOL60D13 Quinpirole 1mg/kg RI-69 JCC p. 700, Fig 2b JD 121901 from data file 11054779.04 Activity after saline administration (baseline); distance traveled [cm] Acute sensitivity and tolerance to quinpirole (a dopamine mimetic with selectivity for D(2)/D(3) dopamine receptors) were evaluated in the C57BL/6J and DBA/2J inbred strains of mice, 24 of their BXD recombinant inbred strains, and 233 F(2) mice. Baseline locomotor activity, locomotor activity following 0.03 mg/kg quinpirole (and 0. 01 mg/kg in BXD mice), body temperature following 1 mg/kg quinpirole, and hypothermic tolerance following 2 or 3 days of quinpirole administration were evaluated. Quantitative trait locus (QTL) analysis was employed to identify genetic determinants of baseline locomotor activity and five behavioral responses to quinpirole. We examined correlated allelic variation in genetic markers of known chromosomal location with variation in each of these phenotypes. We definitively mapped a QTL on Chromosome (Chr) 9 linked to the D(2) dopamine receptor gene, Drd2, for hypothermic sensitivity to quinpirole, and identify a suggestive QTL in the same chromosomal region for tolerance to quinpirole after repeated treatments. Suggestive QTLs were also identified on Chr 19 for sensitivity and tolerance to quinpirole-induced hypothermia and for baseline locomotor activity; on Chr 15 for locomotor sensitivity to quinpirole; and on Chr 13 and 5 for baseline locomotor activity. Our results indicate that genetic differences in quinpirole sensitivity and tolerance are associated with QTLs near Drd2, and that baseline locomotor activity is associated with a suggestive QTL in proximity to the dopamine transporter gene Dat1. These data suggest that the genes influencing locomotor activity, dopamine mimetic sensitivity, and tolerance do not overlap completely. Buck K, Lischka T, Dorow J, Crabbe J. Mapping quantitative trait loci that regulate sensitivity and tolerance to quinpirole, a dopamine mimetic selective for D(2)/D(3) receptors Amer J Med Genet 96(5) 696-705 Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11054779&dopt=Abstract 11054779 05 10-14 wks 70 98 Female 10-44 cm 4856.45 294.2 3130 174.3 3465.56 133.6 2872.5 20.3 4197.17 309.1 3103.19 197.1 3973.81 124.9 1348.96 157.7 4790.5 236.5 2741.05 256.0 4112.67 231.5 4431 334.0 2289.59 150.2 4913.86 286.7 3254.37 190.9 3430.68 223.7 2475.78 136.9 2849.41 155.6 1952.25 83.8 4462.47 345.2 2008.57 158.5 2237.4 128.6 6160.66 266.4 3338.65 144.8 3182.64 161.4 4400.74 207.5 7/1/2003 MK Sullivan SALACT ACT BASAL STHDIST Saline RI-69 JCC p. 699, Fig 1a JD 121901 from data file 11054779.05 Activity decrease after administration of 0.01 mg/kg quinpirole; difference from basal activity, distance traveled [cm] Acute sensitivity and tolerance to quinpirole (a dopamine mimetic with selectivity for D(2)/D(3) dopamine receptors) were evaluated in the C57BL/6J and DBA/2J inbred strains of mice, 24 of their BXD recombinant inbred strains, and 233 F(2) mice. Baseline locomotor activity, locomotor activity following 0.03 mg/kg quinpirole (and 0. 01 mg/kg in BXD mice), body temperature following 1 mg/kg quinpirole, and hypothermic tolerance following 2 or 3 days of quinpirole administration were evaluated. Quantitative trait locus (QTL) analysis was employed to identify genetic determinants of baseline locomotor activity and five behavioral responses to quinpirole. We examined correlated allelic variation in genetic markers of known chromosomal location with variation in each of these phenotypes. We definitively mapped a QTL on Chromosome (Chr) 9 linked to the D(2) dopamine receptor gene, Drd2, for hypothermic sensitivity to quinpirole, and identify a suggestive QTL in the same chromosomal region for tolerance to quinpirole after repeated treatments. Suggestive QTLs were also identified on Chr 19 for sensitivity and tolerance to quinpirole-induced hypothermia and for baseline locomotor activity; on Chr 15 for locomotor sensitivity to quinpirole; and on Chr 13 and 5 for baseline locomotor activity. Our results indicate that genetic differences in quinpirole sensitivity and tolerance are associated with QTLs near Drd2, and that baseline locomotor activity is associated with a suggestive QTL in proximity to the dopamine transporter gene Dat1. These data suggest that the genes influencing locomotor activity, dopamine mimetic sensitivity, and tolerance do not overlap completely. Buck K, Lischka T, Dorow J, Crabbe J. Mapping quantitative trait loci that regulate sensitivity and tolerance to quinpirole, a dopamine mimetic selective for D(2)/D(3) receptors Amer J Med Genet 96(5) 696-705 Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11054779&dopt=Abstract 11054779 06 10-14 wks 70 98 Female 10-44 cm -2878.27 407.2 -843.33 202.3 -1327.56 190.2 -1165.64 136.6 -2840.87 341.5 -1098.64 262.6 -1016.06 152.1 -735.08 241.8 -3267.53 356.7 -1597.27 427.6 -956.22 319.3 -1714.36 586.3 -999.5 213.4 -2063.09 260.1 -1038.57 178.4 -1214.11 260.8 -1095.88 164.9 -902.82 251.3 -848.6 108.2 -1845.5 309.3 -459.14 196.4 -786.2q 228.9 -2773.6 301.0 -914.67 238.1 -1319.57 193.0 -1696.27 277.8 7/1/2003 MK Sullivan QPACT.01(delta) ACT DECR01 DELHD01 Quinpirole .01 mg/kg RI-69 JCC JD 121901 from data file 11054779.06 Activity decrease after administration of 0.03 mg/kg quinpirole; difference from basal activity, distance traveled [cm] Acute sensitivity and tolerance to quinpirole (a dopamine mimetic with selectivity for D(2)/D(3) dopamine receptors) were evaluated in the C57BL/6J and DBA/2J inbred strains of mice, 24 of their BXD recombinant inbred strains, and 233 F(2) mice. Baseline locomotor activity, locomotor activity following 0.03 mg/kg quinpirole (and 0. 01 mg/kg in BXD mice), body temperature following 1 mg/kg quinpirole, and hypothermic tolerance following 2 or 3 days of quinpirole administration were evaluated. Quantitative trait locus (QTL) analysis was employed to identify genetic determinants of baseline locomotor activity and five behavioral responses to quinpirole. We examined correlated allelic variation in genetic markers of known chromosomal location with variation in each of these phenotypes. We definitively mapped a QTL on Chromosome (Chr) 9 linked to the D(2) dopamine receptor gene, Drd2, for hypothermic sensitivity to quinpirole, and identify a suggestive QTL in the same chromosomal region for tolerance to quinpirole after repeated treatments. Suggestive QTLs were also identified on Chr 19 for sensitivity and tolerance to quinpirole-induced hypothermia and for baseline locomotor activity; on Chr 15 for locomotor sensitivity to quinpirole; and on Chr 13 and 5 for baseline locomotor activity. Our results indicate that genetic differences in quinpirole sensitivity and tolerance are associated with QTLs near Drd2, and that baseline locomotor activity is associated with a suggestive QTL in proximity to the dopamine transporter gene Dat1. These data suggest that the genes influencing locomotor activity, dopamine mimetic sensitivity, and tolerance do not overlap completely. Buck K, Lischka T, Dorow J, Crabbe J. Mapping quantitative trait loci that regulate sensitivity and tolerance to quinpirole, a dopamine mimetic selective for D(2)/D(3) receptors Amer J Med Genet 96(5) 696-705 Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11054779&dopt=Abstract 11054779 07 10-14 wks 70 98 Female -2963.64 -1541.71 -1777.94 -1658.43 -2678.6 -1934.9 -1839.38 -808.92 -3388.47 -1582 -2256.11 -2761.92 -1368.38 -2667.27 -2029.77 -1945.8 -1501.44 -1162.07 -1158.05 -1969.09 -717.06 -1669.6 -3768.1 -1573.64 -1691.86 -2403.35 12/20/2002 QPACT.03(delta) ACT DECR03 DELHD03 Quinpirole .03 mg/kg RI-69 JCC p. 699, Fig 1b JD 121901 from data file 11054779.07 Rearing after saline administration [number of beam interruptions] [Unpublished means from same series of studies as reported in: Buck, Lischka, Dorow, Crabbe, 2000 AmerJMedGenet (NeuropsychiGenet) 96:696-705] Acute sensitivity and tolerance to quinpirole (a dopamine mimetic with selectivity for D(2)/D(3) dopamine receptors) were evaluated in the C57BL/6J and DBA/2J inbred strains of mice, 24 of their BXD recombinant inbred strains, and 233 F(2) mice. Baseline locomotor activity, locomotor activity following 0.03 mg/kg quinpirole (and 0. 01 mg/kg in BXD mice), body temperature following 1 mg/kg quinpirole, and hypothermic tolerance following 2 or 3 days of quinpirole administration were evaluated. Quantitative trait locus (QTL) analysis was employed to identify genetic determinants of baseline locomotor activity and five behavioral responses to quinpirole. We examined correlated allelic variation in genetic markers of known chromosomal location with variation in each of these phenotypes. We definitively mapped a QTL on Chromosome (Chr) 9 linked to the D(2) dopamine receptor gene, Drd2, for hypothermic sensitivity to quinpirole, and identify a suggestive QTL in the same chromosomal region for tolerance to quinpirole after repeated treatments. Suggestive QTLs were also identified on Chr 19 for sensitivity and tolerance to quinpirole-induced hypothermia and for baseline locomotor activity; on Chr 15 for locomotor sensitivity to quinpirole; and on Chr 13 and 5 for baseline locomotor activity. Our results indicate that genetic differences in quinpirole sensitivity and tolerance are associated with QTLs near Drd2, and that baseline locomotor activity is associated with a suggestive QTL in proximity to the dopamine transporter gene Dat1. These data suggest that the genes influencing locomotor activity, dopamine mimetic sensitivity, and tolerance do not overlap completely. Buck K, Lischka T, Dorow J, Crabbe J. Mapping quantitative trait loci that regulate sensitivity and tolerance to quinpirole, a dopamine mimetic selective for D(2)/D(3) receptors Amer J Med Genet 96(5) 696-705 Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11054779&dopt=Abstract 11054779 86 10-14 wks 70 98 Female number of beam interruptions 277.448 356.462 173.882 167.357 263.933 330.952 357.313 114.48 273 195.545 214.556 220.783 184.235 249.455 272.741 296.737 99.813 214.813 84.85 299.158 118.467 136.8 282 335.217 210.048 380.095 12/19/2002 SALREAR REAR BASAL STVACT Saline RI-69 JCC JD 121901 from file 11054779.86 Rearing decrease after 0.01 mg/kg quinpirole; difference from basal rearing, [number of beam interruptions] Acute sensitivity and tolerance to quinpirole (a dopamine mimetic with selectivity for D(2)/D(3) dopamine receptors) were evaluated in the C57BL/6J and DBA/2J inbred strains of mice, 24 of their BXD recombinant inbred strains, and 233 F(2) mice. Baseline locomotor activity, locomotor activity following 0.03 mg/kg quinpirole (and 0. 01 mg/kg in BXD mice), body temperature following 1 mg/kg quinpirole, and hypothermic tolerance following 2 or 3 days of quinpirole administration were evaluated. Quantitative trait locus (QTL) analysis was employed to identify genetic determinants of baseline locomotor activity and five behavioral responses to quinpirole. We examined correlated allelic variation in genetic markers of known chromosomal location with variation in each of these phenotypes. We definitively mapped a QTL on Chromosome (Chr) 9 linked to the D(2) dopamine receptor gene, Drd2, for hypothermic sensitivity to quinpirole, and identify a suggestive QTL in the same chromosomal region for tolerance to quinpirole after repeated treatments. Suggestive QTLs were also identified on Chr 19 for sensitivity and tolerance to quinpirole-induced hypothermia and for baseline locomotor activity; on Chr 15 for locomotor sensitivity to quinpirole; and on Chr 13 and 5 for baseline locomotor activity. Our results indicate that genetic differences in quinpirole sensitivity and tolerance are associated with QTLs near Drd2, and that baseline locomotor activity is associated with a suggestive QTL in proximity to the dopamine transporter gene Dat1. These data suggest that the genes influencing locomotor activity, dopamine mimetic sensitivity, and tolerance do not overlap completely. Buck K, Lischka T, Dorow J, Crabbe J. Mapping quantitative trait loci that regulate sensitivity and tolerance to quinpirole, a dopamine mimetic selective for D(2)/D(3) receptors Amer J Med Genet 96(5) 696-705 Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11054779&dopt=Abstract 11054779 85 10-14 wks 70 98 Female -124.267 -77.33 -27.375 -57.286 -164.4 -101.636 -86.125 -54.615 -150.53 -105.091 -23.333 -52.182 -64 -20.364 -88.571 -62.667 -31.875 -72.706 -33.1 -126.25 9.571 -32 -102.1 -49.5 -55.333 -153.273 12/19/2002 QPREAR.01(delta) REAR DECR01 DELVAC01 Quinpirole .01 mg/kg RI-69 JCC JD 121901 from file 11054779.85 Rearing decrease after 0.03 mg/kg quinpirole; difference from basal rearing, [number of beam interruptions] Acute sensitivity and tolerance to quinpirole (a dopamine mimetic with selectivity for D(2)/D(3) dopamine receptors) were evaluated in the C57BL/6J and DBA/2J inbred strains of mice, 24 of their BXD recombinant inbred strains, and 233 F(2) mice. Baseline locomotor activity, locomotor activity following 0.03 mg/kg quinpirole (and 0. 01 mg/kg in BXD mice), body temperature following 1 mg/kg quinpirole, and hypothermic tolerance following 2 or 3 days of quinpirole administration were evaluated. Quantitative trait locus (QTL) analysis was employed to identify genetic determinants of baseline locomotor activity and five behavioral responses to quinpirole. We examined correlated allelic variation in genetic markers of known chromosomal location with variation in each of these phenotypes. We definitively mapped a QTL on Chromosome (Chr) 9 linked to the D(2) dopamine receptor gene, Drd2, for hypothermic sensitivity to quinpirole, and identify a suggestive QTL in the same chromosomal region for tolerance to quinpirole after repeated treatments. Suggestive QTLs were also identified on Chr 19 for sensitivity and tolerance to quinpirole-induced hypothermia and for baseline locomotor activity; on Chr 15 for locomotor sensitivity to quinpirole; and on Chr 13 and 5 for baseline locomotor activity. Our results indicate that genetic differences in quinpirole sensitivity and tolerance are associated with QTLs near Drd2, and that baseline locomotor activity is associated with a suggestive QTL in proximity to the dopamine transporter gene Dat1. These data suggest that the genes influencing locomotor activity, dopamine mimetic sensitivity, and tolerance do not overlap completely. Buck K, Lischka T, Dorow J, Crabbe J. Mapping quantitative trait loci that regulate sensitivity and tolerance to quinpirole, a dopamine mimetic selective for D(2)/D(3) receptors Amer J Med Genet 96(5) 696-705 Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11054779&dopt=Abstract 11054779 84 10-14 wks 70 98 Female -184.5 -180.286 -66.56 -79.571 -137.2 -168.2 -120.875 -74.833 -201.2 -104.545 -120.333 -120.167 -115.38 -83.273 -148.308 -179.4 -77.625 -78.267 -29.1 -162.909 -20.25 -89.2 -123.714 -157.27 -107.714 -216.857 12/19/2002 QPREAR.03(delta) REAR DECR03 DELVAC03 Quinpirole .03 mg/kg RI-69 JCC JD 121901 from file 11054779.84 BEC (blood ethanol concentration) from the retro-orbital sinus at recovery of righting reflex [mg/ml] BACKGROUND: Genetic and environmental factors contribute to an individual's sensitivity to ethanol, although the exact genes underlying ethanol's effects are not known. Quantitative trait locus (QTL) mapping is one successful method for provisionally identifying genes participating in the mediation of a given behavior. QTL analyses seek to identify associations between a quantitative response and previously mapped marker genes across genetically diverse individuals. Many QTL analyses have been performed in BXD recombinant inbred (RI) strains of mice derived from a cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. METHODS: We conducted a QTL analysis of ethanol-induced loss of righting reflex and ataxia using a panel of 25 BXD RI strains and the progenitors B6 and D2. We measured the duration of loss of righting reflex after injection and blood ethanol concentrations upon regaining of righting reflex. Ataxia was measured as the latency to fall from a vertical screen. RESULTS: Genome-wide QTL analyses correlating strain means with allelic status at >1500 markers identified several associations (p < or = 0.01). These provisional QTLs were on all chromosomes except 2, 5, 12, 13, and X, and several map near potential candidate genes. CONCLUSIONS: These results suggest that ethanol sensitivity is determined by the actions of multiple genes and further suggest their general chromosomal map locations. These provisional linkages will now be confirmed or rejected using additional genetically segregating populations. Browman KE, Crabbe JC. Quantitative trait loci affecting ethanol sensitivity in BXD recombinant inbred mice Alcohol Clin Exp Res 24(1) 17-23 Jan 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10656187&dopt=Abstract 10656187 01 8-18 wks 56 126 Female 4-18 mg/ml 3.915 0.231 3.58 0.098 3.788 0.070 3.46 0.087 3.966 0.104 3.453 0.079 3.971 0.101 3.894 0.100 3.406 0.114 3.837 0.048 3.846 0.078 3.899 0.178 3.446 0.078 3.547 0.124 3.266 0.128 3.581 0.125 3.406 0.099 4.084 0.136 3.813 0.106 3.651 0.073 4.121 0.162 4.002 0.084 3.757 0.109 4.129 0.155 3.634 0.073 3.843 0.140 7/16/2003 MK Sullivan ETLORRBEC4.1 LRRBEC BEC LORR EtOH 4.1 g/kg 20% V/V RI-80 JCC p.19, Fig 1A JRS 2/11/00 and JD with JCC 020702 10656187.01 Duration of post-ethanol loss of righting reflex [minutes] BACKGROUND: Genetic and environmental factors contribute to an individual's sensitivity to ethanol, although the exact genes underlying ethanol's effects are not known. Quantitative trait locus (QTL) mapping is one successful method for provisionally identifying genes participating in the mediation of a given behavior. QTL analyses seek to identify associations between a quantitative response and previously mapped marker genes across genetically diverse individuals. Many QTL analyses have been performed in BXD recombinant inbred (RI) strains of mice derived from a cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. METHODS: We conducted a QTL analysis of ethanol-induced loss of righting reflex and ataxia using a panel of 25 BXD RI strains and the progenitors B6 and D2. We measured the duration of loss of righting reflex after injection and blood ethanol concentrations upon regaining of righting reflex. Ataxia was measured as the latency to fall from a vertical screen. RESULTS: Genome-wide QTL analyses correlating strain means with allelic status at >1500 markers identified several associations (p < or = 0.01). These provisional QTLs were on all chromosomes except 2, 5, 12, 13, and X, and several map near potential candidate genes. CONCLUSIONS: These results suggest that ethanol sensitivity is determined by the actions of multiple genes and further suggest their general chromosomal map locations. These provisional linkages will now be confirmed or rejected using additional genetically segregating populations. Browman KE, Crabbe JC. Quantitative trait loci affecting ethanol sensitivity in BXD recombinant inbred mice Alcohol Clin Exp Res 24(1) 17-23 Jan 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10656187&dopt=Abstract 10656187 02 8-18 wks 56 126 Female 4-18 minutes 88.222 9.55 87.254 7.01 130.45 15.74 172.442 10.07 114.3 21.78 131.204 18.04 93.668 10.82 82.472 8.71 176.828 10.60 148.655 22.79 94.72 7.75 122.329 7.75 124.98 24.83 182.56 21.34 194.169 28.89 132.467 16.44 155.08 27.73 111.9 15.81 138.067 8.02 113.967 6.26 161.538 35.27 118.362 13.22 122.59 10.07 56.071 5.07 124.086 8.59 178.463 21.01 7/16/2003 MK Sullivan ETLORR4.1 LRRDUR DURATION LORR EtOH 4.1 g/kg 20% V/V RI-80 JCC p.19, Fig 1B JRS 2/11/00 and JD with JCC 020702 10656187.02 Ethanol induced ataxia - Screen test sensitivity, latency to fall, saline response minus 2.5 g/kg Ethanol response [seconds] [NOTE: dose was reported incorrectly in the cited publication] BACKGROUND: Genetic and environmental factors contribute to an individual's sensitivity to ethanol, although the exact genes underlying ethanol's effects are not known. Quantitative trait locus (QTL) mapping is one successful method for provisionally identifying genes participating in the mediation of a given behavior. QTL analyses seek to identify associations between a quantitative response and previously mapped marker genes across genetically diverse individuals. Many QTL analyses have been performed in BXD recombinant inbred (RI) strains of mice derived from a cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. METHODS: We conducted a QTL analysis of ethanol-induced loss of righting reflex and ataxia using a panel of 25 BXD RI strains and the progenitors B6 and D2. We measured the duration of loss of righting reflex after injection and blood ethanol concentrations upon regaining of righting reflex. Ataxia was measured as the latency to fall from a vertical screen. RESULTS: Genome-wide QTL analyses correlating strain means with allelic status at >1500 markers identified several associations (p < or = 0.01). These provisional QTLs were on all chromosomes except 2, 5, 12, 13, and X, and several map near potential candidate genes. CONCLUSIONS: These results suggest that ethanol sensitivity is determined by the actions of multiple genes and further suggest their general chromosomal map locations. These provisional linkages will now be confirmed or rejected using additional genetically segregating populations. Browman KE, Crabbe JC. Quantitative trait loci affecting ethanol sensitivity in BXD recombinant inbred mice Alcohol Clin Exp Res 24(1) 17-23 Jan 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10656187&dopt=Abstract 10656187 03 7-20 49 140 Female 4-18 seconds 45.155 3.30 16.107 6.19 43.169 4.02 43.434 0.04 27.264 11.30 33.383 6.15 42.943 4.77 35.512 8.25 16.804 7.27 41.471 1.99 36.536 6.04 36.324 5.05 36.524 6.26 46.496 4.28 40.204 4.76 30.813 7.18 35.676 5.87 27.141 7.75 25.203 13.78 21.797 6.97 32.526 6.79 28.99 8.60 39.616 7.68 49.821 1.21 24.452 8.69 46.511 5.34 40.265 3.61 7/16/2003 MK Sullivan ETSCR2(delta) SCREEN DELLAT SCREEN EtOH 2.5g/kg RI-80 JCC p.19, Fig 1C JRS 2/11/00 and JD with JCC 020702 10656187.03 Area under the 25-hr curve for withdrawal following 72 hr exposure to EtOH vapor. Pyrazole injections were given daily to inhibit EtOH metabolism. Handling-induced convulsions (HIC) were scored hourly for 10 hr and again at hrs 24 and 25 [seizure severity] Male mice from C57BL/6J (B6), DBA/2J (D2) and their 25 recombinant inbred (RI) strains were exposed to ethanol (EtOH) vapor (3.0-9.0 mg EtOH/liter of air) for 72 hr. Mice were selected such that each strain averaged 1.34 to 1.59 mg of EtOH/ml of blood on withdrawal. Control groups and EtOH-exposed groups were tested hourly for handling-induced convulsions (HIC) for 10 hr and at hr 24 and 25. Strain withdrawal severity was indexed as the area under the 25-hr HIC curve for the EtOH group minus that strain's equivalent value for the control group. Genome-wide quantitative trait locus (QTL) analyses correlating strain means with allelic status at > 1500 markers identified 10 chromosomal regions at P < .01. These provisionally identified QTLs were on chromosomes 1 (2 QTLs), 3, 9 (2 QTLs), 10, 12, 13, 15 and 18. Multiple regression analysis using the four most influential QTLs revealed that these loci controlled 86% of the genetic variance. A QTL mapped to distal chromosome 1 (P < .001) is in the same region as one previously definitively mapped for acute alcohol withdrawal, as well as one mapped for acute pentobarbital withdrawal. Several of the QTLs map near potential candidate genes. These provisional linkages will now be confirmed or rejected using additional genetically segregating populations. Crabbe JC Provisional mapping of quantitative trait loci for chronic ethanol withdrawal severity in BXD recombinant inbred mice J Pharmacol Exp Ther 286(1) 263-271 Jul 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9655868&dopt=Abstract 9655868 01 Male 3-58 seizure severity:0= no response; 4 or 5= sever tonic or clonic convulsions; 6 or 7= sever or tonic convulsions after mouse released 42.65 1.85 77.11 3.44 58 2.64 83.25 3.94 72.21 7.25 33.65 3.99 54.75 5.60 74.69 3.84 65.24 4.50 48.41 3.04 66.86 4.23 49.03 3.63 29.78 11.77 36.19 5.78 30.38 4.05 7.19 1.70 56.1 2.44 58.57 4.73 78.33 0.63 68.42 6.98 59.71 9.10 58.86 4.31 46.93 4.65 14.77 2.84 70.25 4.78 5.5 1.75 57.88 4.60 6/19/2003 MK Sullivan ETHIC(VAP) AREA25 AREA25 ETMEAN EtOH 1.5 mg/ml blood RI-106 JCC p. 267, Fig 7 EQ 2/9/00 and JD 020702 9655868.01 Area under the 25-hr curve for withdrawal following 72 hr exposure to air. Pyrazole injections were given daily to inhibit EtOH metabolism. Handling-induced convulsions (HIC) were scored hourly for 10 hr and again at hrs 24 and 25 [seizure severity] Male mice from C57BL/6J (B6), DBA/2J (D2) and their 25 recombinant inbred (RI) strains were exposed to ethanol (EtOH) vapor (3.0-9.0 mg EtOH/liter of air) for 72 hr. Mice were selected such that each strain averaged 1.34 to 1.59 mg of EtOH/ml of blood on withdrawal. Control groups and EtOH-exposed groups were tested hourly for handling-induced convulsions (HIC) for 10 hr and at hr 24 and 25. Strain withdrawal severity was indexed as the area under the 25-hr HIC curve for the EtOH group minus that strain's equivalent value for the control group. Genome-wide quantitative trait locus (QTL) analyses correlating strain means with allelic status at > 1500 markers identified 10 chromosomal regions at P < .01. These provisionally identified QTLs were on chromosomes 1 (2 QTLs), 3, 9 (2 QTLs), 10, 12, 13, 15 and 18. Multiple regression analysis using the four most influential QTLs revealed that these loci controlled 86% of the genetic variance. A QTL mapped to distal chromosome 1 (P < .001) is in the same region as one previously definitively mapped for acute alcohol withdrawal, as well as one mapped for acute pentobarbital withdrawal. Several of the QTLs map near potential candidate genes. These provisional linkages will now be confirmed or rejected using additional genetically segregating populations. Crabbe JC Provisional mapping of quantitative trait loci for chronic ethanol withdrawal severity in BXD recombinant inbred mice J Pharmacol Exp Ther 286(1) 263-271 Jul 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9655868&dopt=Abstract 9655868 02 Male 3-24 seizure severity:0= no response; 4 or 5= sever tonic or clonic convulsions; 6 or 7= sever or tonic convulsions after mouse released 9.9 1.90 15.54 3.69 29.19 4.24 7.72 2.84 39 4.73 1.71 0.92 38.58 5.23 24 3.99 6.06 3.78 24.33 5.93 35.38 6.68 4.28 1.55 2.21 1.40 2.67 0.71 3.5 1.94 0 0 10.85 3.74 13.57 5.42 4.83 0.64 3.19 1.71 0.67 0 8.31 2.10 5.33 1.71 0.08 0 31.22 3.99 0.22 0 0.29 0 6/19/2003 MK Sullivan PYRHIC68.1(VAP) PYRAREA25 PYRAREA25 SALMEAN Air/Pyrazole RI-106 JCC p. 267, Fig 7 EQ 2/9/00 and JD 020702 9655868.02 EtOH withdrawal severity corrected for differences in HIC (handling-induced convulsions) response to pyrazole. Difference between strain mean values for AREA25 and PYRAREA25 [seizure severity] Male mice from C57BL/6J (B6), DBA/2J (D2) and their 25 recombinant inbred (RI) strains were exposed to ethanol (EtOH) vapor (3.0-9.0 mg EtOH/liter of air) for 72 hr. Mice were selected such that each strain averaged 1.34 to 1.59 mg of EtOH/ml of blood on withdrawal. Control groups and EtOH-exposed groups were tested hourly for handling-induced convulsions (HIC) for 10 hr and at hr 24 and 25. Strain withdrawal severity was indexed as the area under the 25-hr HIC curve for the EtOH group minus that strain's equivalent value for the control group. Genome-wide quantitative trait locus (QTL) analyses correlating strain means with allelic status at > 1500 markers identified 10 chromosomal regions at P < .01. These provisionally identified QTLs were on chromosomes 1 (2 QTLs), 3, 9 (2 QTLs), 10, 12, 13, 15 and 18. Multiple regression analysis using the four most influential QTLs revealed that these loci controlled 86% of the genetic variance. A QTL mapped to distal chromosome 1 (P < .001) is in the same region as one previously definitively mapped for acute alcohol withdrawal, as well as one mapped for acute pentobarbital withdrawal. Several of the QTLs map near potential candidate genes. These provisional linkages will now be confirmed or rejected using additional genetically segregating populations. Crabbe JC Provisional mapping of quantitative trait loci for chronic ethanol withdrawal severity in BXD recombinant inbred mice J Pharmacol Exp Ther 286(1) 263-271 Jul 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9655868&dopt=Abstract 9655868 03 Male 3-58 seizure severity:0= no response; 4 or 5= sever tonic or clonic convulsions; 6 or 7= sever or tonic convulsions after mouse released 32.75 1.90 61.57 3.48 29.01 2.46 75.53 3.94 33.21 3.52 31.94 4.05 16.17 5.36 50.69 3.87 59.17 4.57 24.08 3.09 31.48 4.18 44.76 3.54 27.56 11.60 33.52 5.67 26.88 4.00 7.19 1.87 45.25 2.30 45 4.67 73.5 0.79 65.24 7.11 59.05 8.97 50.56 4.30 41.6 4.03 14.69 2.94 39.03 4.64 5.28 1.56 57.58 4.48 6/19/2003 MK Sullivan ETHIC(VAPdelta) DELAREA25 DELAREA25 WDR DIFFAR EtOH 1.5 mg/ml blood RI-106 JCC p. 267, Fig 8 EQ 2/9/00 and JD 020702 9655868.03 Locomotor activity. Corn Oil, 30 minute test. Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 02 7 wks 49 Male 46.7 46.2 57.3 33.2 27 52.5 36.1 30.9 39.3 31.6 49.1 31.2 31.7 39 44.4 40.8 25.3 40.9 33.3 24.1 55.9 31.3 36.8 41.6 12/26/2002 OILACT OILACT Corn Oil 10ml/kg FOR p. 671, Fig 1 MRG with FOR from files and publication 021402 11106859.02 Locomotor activity. Paraoxon, 30 minute test. Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 01 7 wks 49 Male 29 14.2 26.3 42.6 14.4 39 24.3 14.9 20.4 11.4 33.8 16.7 15.1 31.3 22.7 17.1 9.9 24.7 26.6 12.5 36.6 25 15 12.2 12/26/2002 PARAOX PARAOX Paraoxon 0.25mg/kg FOR p. 671, Fig 1 MRG with FOR from files and publication 021402 11106859.01 54 degree C hot plate latencies baseline (before 3 min forced swim in 15 degree C water) MF [seconds] It is increasingly appreciated that the sexes differ in their perception of noxious stimuli and in their responsivity to exogenous and endogenous analgesic manipulations. We previously reported the existence of qualitative sex differences in the neurochemical mediation of nonopioid (i.e., naloxone-insensitive) stress-induced analgesia (SIA) produced by forced swims and suggested that female mice possess a sex-specific SIA mechanism. This female-specific system is now known to be estrogen-dependent, to be ontogenetically organized, and to vary with reproductive status; however, its neurochemical identity remains obscure. In an attempt to identify candidate genes underlying SIA in both sexes, we performed a two-phase quantitative trait locus (QTL) mapping experiment using the BXD/Ty recombinant inbred (RI) set derived from DBA/2J (D2) and C57BL/6J (B6) inbred mouse strains and (B6xD2)F2 hybrid mice derived from these same progenitors. All mice were subjected to 3 min forced swims in 15 degrees C water; nociceptive sensitivity on the 54 degrees C hot-plate assay was assessed immediately before and 2 min after cessation of the swim. We report the localization of a QTL statistically associated with SIA magnitude [p = 0.00000012; logarithm of the odds (LOD) = 6.1] in female mice only. This female-specific QTL, which we name Fsia1, is located on chromosome 8 at 52-84 cM from the centromere and accounts for 17-26% of the overall trait variance in this sex. The present data provide further evidence of the existence of a female-specific SIA mechanism and highlight the important role of both genetic background and gender in the inhibition of pain. Mogil JS, Richards SP, O'Toole LA, Helms ML, Mitchell SR, Kest B, Belknap JK. Identification of a sex-specific quantitative trait locus mediating nonopioid stress-induced analgesia in female mice J Neurosci 17(20) 7995-8002 Oct 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9315917&dopt=Abstract 9315917 97461641 01 8-12 wks 56 96 MF 9-26 seconds 19.1 1.2 24.3 1.6 22.6 0.9 19.4 1.6 18.3 1.7 19.8 1.8 28.6 2.1 19.8 2.1 18.1 1.7 24.5 1.7 23.9 2.3 24.6 2.2 18.3 1.6 15.1 1.5 25.9 1.7 16.1 1.5 20.9 1.5 24.6 3.2 15.9 2.1 24.2 2.0 20.4 1.8 18.3 1.3 17.9 1.3 18.9 1.1 13 1.1 13.6 1.2 7/3/2003 MK Sullivan 9315917.01 54 degree C hot plate latencies baseline (before 3 min forced swim in 15 degree C water), Female [seconds] It is increasingly appreciated that the sexes differ in their perception of noxious stimuli and in their responsivity to exogenous and endogenous analgesic manipulations. We previously reported the existence of qualitative sex differences in the neurochemical mediation of nonopioid (i.e., naloxone-insensitive) stress-induced analgesia (SIA) produced by forced swims and suggested that female mice possess a sex-specific SIA mechanism. This female-specific system is now known to be estrogen-dependent, to be ontogenetically organized, and to vary with reproductive status; however, its neurochemical identity remains obscure. In an attempt to identify candidate genes underlying SIA in both sexes, we performed a two-phase quantitative trait locus (QTL) mapping experiment using the BXD/Ty recombinant inbred (RI) set derived from DBA/2J (D2) and C57BL/6J (B6) inbred mouse strains and (B6xD2)F2 hybrid mice derived from these same progenitors. All mice were subjected to 3 min forced swims in 15 degrees C water; nociceptive sensitivity on the 54 degrees C hot-plate assay was assessed immediately before and 2 min after cessation of the swim. We report the localization of a QTL statistically associated with SIA magnitude [p = 0.00000012; logarithm of the odds (LOD) = 6.1] in female mice only. This female-specific QTL, which we name Fsia1, is located on chromosome 8 at 52-84 cM from the centromere and accounts for 17-26% of the overall trait variance in this sex. The present data provide further evidence of the existence of a female-specific SIA mechanism and highlight the important role of both genetic background and gender in the inhibition of pain. Mogil JS, Richards SP, O'Toole LA, Helms ML, Mitchell SR, Kest B, Belknap JK. Identification of a sex-specific quantitative trait locus mediating nonopioid stress-induced analgesia in female mice J Neurosci 17(20) 7995-8002 Oct 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9315917&dopt=Abstract 9315917 97461641 02 8-12 wks 56 96 Female 3-10 seconds 20.5 1.4 22.2 2.4 21.4 0.6 20 2.4 17.1 2.3 19.9 2.9 27.3 2.8 16.3 2.2 14.9 1.7 26 2.8 21.3 2.2 18.7 1.2 16.5 2.7 15.9 0.6 23.6 2.7 15.2 2.3 20.7 2.7 17.3 5.5 13.5 2.1 19.5 2.1 21.3 1.9 17.4 1.7 16.9 1.9 18 1.6 12.6 1.3 12.4 1.3 7/3/2003 MK Sullivan 9315917.02 54 degree C hot plate latencies baseline (before 3 min forced swim in 15 degree C water), Male [seconds] It is increasingly appreciated that the sexes differ in their perception of noxious stimuli and in their responsivity to exogenous and endogenous analgesic manipulations. We previously reported the existence of qualitative sex differences in the neurochemical mediation of nonopioid (i.e., naloxone-insensitive) stress-induced analgesia (SIA) produced by forced swims and suggested that female mice possess a sex-specific SIA mechanism. This female-specific system is now known to be estrogen-dependent, to be ontogenetically organized, and to vary with reproductive status; however, its neurochemical identity remains obscure. In an attempt to identify candidate genes underlying SIA in both sexes, we performed a two-phase quantitative trait locus (QTL) mapping experiment using the BXD/Ty recombinant inbred (RI) set derived from DBA/2J (D2) and C57BL/6J (B6) inbred mouse strains and (B6xD2)F2 hybrid mice derived from these same progenitors. All mice were subjected to 3 min forced swims in 15 degrees C water; nociceptive sensitivity on the 54 degrees C hot-plate assay was assessed immediately before and 2 min after cessation of the swim. We report the localization of a QTL statistically associated with SIA magnitude [p = 0.00000012; logarithm of the odds (LOD) = 6.1] in female mice only. This female-specific QTL, which we name Fsia1, is located on chromosome 8 at 52-84 cM from the centromere and accounts for 17-26% of the overall trait variance in this sex. The present data provide further evidence of the existence of a female-specific SIA mechanism and highlight the important role of both genetic background and gender in the inhibition of pain. Mogil JS, Richards SP, O'Toole LA, Helms ML, Mitchell SR, Kest B, Belknap JK. Identification of a sex-specific quantitative trait locus mediating nonopioid stress-induced analgesia in female mice J Neurosci 17(20) 7995-8002 Oct 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9315917&dopt=Abstract 9315917 97461641 03 8-12 wks 56 96 Male 4-18 seconds 17.5 1.9 26.1 2.0 23.7 1.7 18.9 2.1 19.8 2.5 19.7 2.2 30.5 3.2 26.6 1.9 22.1 2.6 23 2.1 26.6 4.0 29.7 2.8 20.3 1.6 14.1 3.2 27.4 2.1 17 1.9 21 1.4 28.2 3.2 18.2 3.5 27.9 2.8 19.5 3.3 19.2 1.9 18.8 1.8 19.9 1.6 13.3 1.7 14.7 2.0 7/3/2003 MK Sullivan 9315917.03 54 degree C hot plate latencies Post-Swim MF [seconds] It is increasingly appreciated that the sexes differ in their perception of noxious stimuli and in their responsivity to exogenous and endogenous analgesic manipulations. We previously reported the existence of qualitative sex differences in the neurochemical mediation of nonopioid (i.e., naloxone-insensitive) stress-induced analgesia (SIA) produced by forced swims and suggested that female mice possess a sex-specific SIA mechanism. This female-specific system is now known to be estrogen-dependent, to be ontogenetically organized, and to vary with reproductive status; however, its neurochemical identity remains obscure. In an attempt to identify candidate genes underlying SIA in both sexes, we performed a two-phase quantitative trait locus (QTL) mapping experiment using the BXD/Ty recombinant inbred (RI) set derived from DBA/2J (D2) and C57BL/6J (B6) inbred mouse strains and (B6xD2)F2 hybrid mice derived from these same progenitors. All mice were subjected to 3 min forced swims in 15 degrees C water; nociceptive sensitivity on the 54 degrees C hot-plate assay was assessed immediately before and 2 min after cessation of the swim. We report the localization of a QTL statistically associated with SIA magnitude [p = 0.00000012; logarithm of the odds (LOD) = 6.1] in female mice only. This female-specific QTL, which we name Fsia1, is located on chromosome 8 at 52-84 cM from the centromere and accounts for 17-26% of the overall trait variance in this sex. The present data provide further evidence of the existence of a female-specific SIA mechanism and highlight the important role of both genetic background and gender in the inhibition of pain. Mogil JS, Richards SP, O'Toole LA, Helms ML, Mitchell SR, Kest B, Belknap JK. Identification of a sex-specific quantitative trait locus mediating nonopioid stress-induced analgesia in female mice J Neurosci 17(20) 7995-8002 Oct 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9315917&dopt=Abstract 9315917 97461641 04 8-12 wks 56 96 MF 9-26 seconds 46.5 4.3 42.5 3.9 58.2 1.2 32.5 3.8 48.2 4..8 50.6 3.0 52.1 3.5 55.5 3.1 52.5 3.6 55.1 2.1 60 0 35.8 4.6 43.9 3.6 49.6 3.6 51.5 3.0 33.1 3.1 56.4 3.2 44.2 6.5 37 4.0 54.9 2.6 54.5 2.3 50.7 3.3 33.4 4.0 34.2 5.0 24.6 4.2 41.4 3.3 7/3/2003 MK Sullivan 9315917.04 54 degree C hot plate latencies Post-Swim Female [seconds] It is increasingly appreciated that the sexes differ in their perception of noxious stimuli and in their responsivity to exogenous and endogenous analgesic manipulations. We previously reported the existence of qualitative sex differences in the neurochemical mediation of nonopioid (i.e., naloxone-insensitive) stress-induced analgesia (SIA) produced by forced swims and suggested that female mice possess a sex-specific SIA mechanism. This female-specific system is now known to be estrogen-dependent, to be ontogenetically organized, and to vary with reproductive status; however, its neurochemical identity remains obscure. In an attempt to identify candidate genes underlying SIA in both sexes, we performed a two-phase quantitative trait locus (QTL) mapping experiment using the BXD/Ty recombinant inbred (RI) set derived from DBA/2J (D2) and C57BL/6J (B6) inbred mouse strains and (B6xD2)F2 hybrid mice derived from these same progenitors. All mice were subjected to 3 min forced swims in 15 degrees C water; nociceptive sensitivity on the 54 degrees C hot-plate assay was assessed immediately before and 2 min after cessation of the swim. We report the localization of a QTL statistically associated with SIA magnitude [p = 0.00000012; logarithm of the odds (LOD) = 6.1] in female mice only. This female-specific QTL, which we name Fsia1, is located on chromosome 8 at 52-84 cM from the centromere and accounts for 17-26% of the overall trait variance in this sex. The present data provide further evidence of the existence of a female-specific SIA mechanism and highlight the important role of both genetic background and gender in the inhibition of pain. Mogil JS, Richards SP, O'Toole LA, Helms ML, Mitchell SR, Kest B, Belknap JK. Identification of a sex-specific quantitative trait locus mediating nonopioid stress-induced analgesia in female mice J Neurosci 17(20) 7995-8002 Oct 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9315917&dopt=Abstract 9315917 97461641 05 8-12 wks 56 96 Female 3-10 seconds 46.7 5.0 39.1 4.5 58.1 1.9 29.6 3.2 51.6 5.9 51.3 4.4 54.2 3.3 53.2 4.4 54.5 3.8 55.4 3.3 60 0 30 7.5 39.4 5.7 50.2 5.1 47.7 6.2 34.0 4.4 60 0 31.7 14.2 31.5 5.5 57.1 2.9 60 0 47.1 4.4 33.4 5.2 28 6.1 14.7 2.4 44.4 4.6 7/3/2003 MK Sullivan 9315917.05 54 degree C hot plate latencies Post-Swim Male [seconds] It is increasingly appreciated that the sexes differ in their perception of noxious stimuli and in their responsivity to exogenous and endogenous analgesic manipulations. We previously reported the existence of qualitative sex differences in the neurochemical mediation of nonopioid (i.e., naloxone-insensitive) stress-induced analgesia (SIA) produced by forced swims and suggested that female mice possess a sex-specific SIA mechanism. This female-specific system is now known to be estrogen-dependent, to be ontogenetically organized, and to vary with reproductive status; however, its neurochemical identity remains obscure. In an attempt to identify candidate genes underlying SIA in both sexes, we performed a two-phase quantitative trait locus (QTL) mapping experiment using the BXD/Ty recombinant inbred (RI) set derived from DBA/2J (D2) and C57BL/6J (B6) inbred mouse strains and (B6xD2)F2 hybrid mice derived from these same progenitors. All mice were subjected to 3 min forced swims in 15 degrees C water; nociceptive sensitivity on the 54 degrees C hot-plate assay was assessed immediately before and 2 min after cessation of the swim. We report the localization of a QTL statistically associated with SIA magnitude [p = 0.00000012; logarithm of the odds (LOD) = 6.1] in female mice only. This female-specific QTL, which we name Fsia1, is located on chromosome 8 at 52-84 cM from the centromere and accounts for 17-26% of the overall trait variance in this sex. The present data provide further evidence of the existence of a female-specific SIA mechanism and highlight the important role of both genetic background and gender in the inhibition of pain. Mogil JS, Richards SP, O'Toole LA, Helms ML, Mitchell SR, Kest B, Belknap JK. Identification of a sex-specific quantitative trait locus mediating nonopioid stress-induced analgesia in female mice J Neurosci 17(20) 7995-8002 Oct 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9315917&dopt=Abstract 9315917 97461641 06 8-12 wks 56 84 Male 4-18 seconds 46.2 7.7 45.6 6.3 58.3 1.7 35.1 6.6 44.2 8.0 49.9 4.4 49.1 7.2 60.0 0.0 49.8 7.0 54.7 2.7 60.0 0.0 40.9 5.5 48.8 3.8 48.8 5.5 53.9 3.1 32.1 4.5 52.7 6.3 50.5 6.0 42.6 5.5 53.2 4.1 48.9 3.8 54.3 4.8 33.5 6.2 40.1 7.7 32.3 6.2 38.6 4.8 7/3/2003 MK Sullivan 9315917.06 Acoustic startle response to a 110 dB SPL, 10 kHz tone without prepulse stimulus[g] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 06 100 days 100 MF 9-15 g 23.6 14.1 23.5 10.7 30.7 10.3 5.6 17.2 14.2 16.3 18.3 14.4 26.2 6.7 18.9 7.9 7.9 2.1 26.4 14.2 57.3 10.6 24.7 15.1 20.7 18.1 6/6/2002 Ryan McNeive Ryan McNeive 10371755.06 High frequency hearing loss and cochlear pathology; Acoustic startle response to 10 kHz white-noise bursts at 100 dB [g] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 02 100 days 100 MF 9-15 g 14.7 10.2 6.7 5.2 19.4 6.2 2.1 6 11.5 6.4 4.9 11 13.9 2.5 9.4 1.8 3.4 1.3 10.8 3.8 42.2 10 4 11.7 7.6 4.7 12/26/2002 Ryan McNeive Ryan McNeive 10371755.02 High frequency hearing loss and cochlear pathology; Acoustic startle response to 20 kHz white-noise bursts at 100 dB [g] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 04 100 days 100 MF 9-15 g 9.1 6.3 6.4 3.4 13 2.1 2.2 6.4 10.6 5.2 8.5 8.6 14.7 2 4.7 5.5 4.1 1.2 11 3.6 31.6 7.4 3.6 17.4 7.8 2.1 12/26/2002 Ryan McNeive Ryan McNeive 10371755.04 High frequency hearing loss and cochlear pathology; Acoustic startle response to 5 kHz white-noise bursts at 100 dB SPL [g] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 01 100 days 100 MF 9-15 g 0.3 1.1 0.4 0.4 5.3 2.8 0.1 1.5 2.7 0.8 -0.1 1.8 4.9 0.1 6.4 -0.5 0.8 0.8 1.7 -0.4 8.8 -1 0.6 0.1 0.5 1.7 12/26/2002 Ryan McNeive Ryan McNeive 10371755.01 High frequency hearing loss and cochlear pathology; Acoustic startle response to 15 kHz white-noise bursts at 100 dB SPL [g] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 03 100 days 100 MF 9-15 g 21.4 7.3 9.9 5.1 14.8 2 2.4 8.8 10 5.2 10.4 7.6 18.1 4.6 7.8 3.6 5 1 15.4 5.2 39.5 7.4 3.4 24.9 9.9 3.6 12/26/2002 Ryan McNeive Ryan McNeive 10371755.03 High frequency hearing loss and cochlear pathology; Acoustic startle response to 25 kHz white-noise bursts at 100 dB SPL [g] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 05 100 days 100 MF 9-15 g 2.9 1.8 2.4 2 3.4 -0.4 1.4 2.1 4.1 2.2 1 4.6 10.4 0.9 1.4 -0.2 0.6 -0.5 -0.2 1.2 16 0.2 1.4 4.4 2.5 -0.8 12/26/2002 Ryan McNeive Ryan McNeive 10371755.05 High frequency hearing loss and cochlear pathology; Acoustic startle response to white-noise bursts at 110 dB SPL [g] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 07 100 days 100 MF 9-15 g 24.3 7.4 14.5 11.7 23.5 12.1 7.5 15.9 10.9 12.4 13.2 21.1 2.6 17.1 2.1 5.5 3.6 20.2 11.3 47.1 12.1 10.1 21.3 16.4 20.9 6/6/2002 Ryan McNeive Ryan McNeive 10371755.07 Alcohol acceptance total consumption over 24 hr female [g/kg] Although the recombinant inbred strain method was designed for molecular genetic analysis of linkage, it also provides powerful quantitative genetic analyses of heritability and genetic correlations. Measures of alcohol acceptance, alcohol preference, and hypnotic dose sensitivity (HDS) were assessed in 21 strains of mice from the BXD RI series. Sex differences were found to be significant at a phenotypic level. However, heritability estimates for acceptance, preference, and HDS are similar in males and females. Heritability estimates for the three measures are approximately 0.20 for acceptance and preference, and 0.10 for HDS. Analyses of genetic correlations reveal that acceptance and preference share some degree of genetic influence, although they mostly operate under different genetically mediated mechanisms. HDS did not show a significant genetic relationship to either acceptance or preference. Strong correlations were obtained when acceptance, preference, and HDS strain means were correlated across male and female recombinant inbreds, suggesting substantial genetic similarity across sexes. Rodriguez LA, Plomin R, Blizard DA, Jones BC, McClearn GE Alcohol acceptance, preference, and sensitivity in mice. I. Quantitative genetic analysis using BXD recombinant inbred strains. Alcohol Clin Exp Res 18(6) 1416-1422 Dec 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7695038&dopt=Abstract 7695038 95209059 01 71-91 days 71 91 Female 8-20 g/kg 20.21 9.18 15.99 15.76 19.37 17.07 12.32 11.03 18.78 116.25 14.88 18.6 21.47 13.51 21.97 15.52 10.85 12.45 10.88 9.63 15.71 18.19 10.39 7/11/2003 MK Sullivan ACCB alcohol acceptance 7695038.01 Alcohol acceptance total consumption over 24 hr male [g/kg] Although the recombinant inbred strain method was designed for molecular genetic analysis of linkage, it also provides powerful quantitative genetic analyses of heritability and genetic correlations. Measures of alcohol acceptance, alcohol preference, and hypnotic dose sensitivity (HDS) were assessed in 21 strains of mice from the BXD RI series. Sex differences were found to be significant at a phenotypic level. However, heritability estimates for acceptance, preference, and HDS are similar in males and females. Heritability estimates for the three measures are approximately 0.20 for acceptance and preference, and 0.10 for HDS. Analyses of genetic correlations reveal that acceptance and preference share some degree of genetic influence, although they mostly operate under different genetically mediated mechanisms. HDS did not show a significant genetic relationship to either acceptance or preference. Strong correlations were obtained when acceptance, preference, and HDS strain means were correlated across male and female recombinant inbreds, suggesting substantial genetic similarity across sexes. Rodriguez LA, Plomin R, Blizard DA, Jones BC, McClearn GE Alcohol acceptance, preference, and sensitivity in mice. I. Quantitative genetic analysis using BXD recombinant inbred strains. Alcohol Clin Exp Res 18(6) 1416-1422 Dec 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7695038&dopt=Abstract 7695038 95209059 02 71-91 days 71 91 Male 7-21 g/kg 16.84 10.22 16.1 14.96 15.26 13.48 11.46 7.73 16.78 14.43 10.03 10.35 14.77 7.08 16.47 14.66 5.12 11.71 12.06 11.73 15.57 15.58 12 7/11/2003 MK Sullivan ACCB alcohol acceptance 7695038.02 Alcohol acceptance - consumption of 10% ethanol in 24 hours after 24 hours of water deprivation [g/kg] Quantitative trait loci (QTL) mapping of complex phenotypes has emerged as an important feature of the recombinant inbred (RI) strain methodology. In this second study of our series on alcohol-related behaviors in mice, we examine alcohol acceptance, preference, and hypnotic dose sensitivity (HDS) to a standard dose of alcohol measured in BXD RI strains to identify candidate QTL regions responsible for their heritability. We detected highly significant marker associations for acceptance on chromosome 12 (Eif4e), for preference on chromosome 1 (D1Rti2) and chromosome 7 (D7Mit7), and for HDS on chromosome 7 (Mpmv1). These are the strongest QTL associations that we detected, but several other candidate QTL regions are reported. Given the limited number of BXD RI strains available, the large number of markers used herein, and the consequent chance of identifying false marker associations, these RI QTL mapping results must be seen as tentative, but an important first step toward identifying QTL for alcohol-related behaviors. Rodriguez LA,Ê Plomin R,ÊBlizard DA,ÊJones BC,Ê McClearn GE. Alcohol acceptance, preference, and sensitivity in mice. II. Quantitative trait loci mapping analysis using BXD recombinant inbred strains. Alcohol Clin Exp Res 19(2) 367-373 Apr 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7625571&dopt=Abstract 7625571 95351511 01 71-91 days 71 91 MF 17-41 g/kg 18.48 9.71 16.05 15.41 17.43 15.37 11.86 9.38 17.67 15.34 12.45 14.48 18.12 10.3 19.08 15.11 7.98 12.1 11.47 10.68 15.64 16.88 11.24 7/11/2003 MK Sullivan ETLORR4.1(PSU) Acceptance ACCEPT EtOH 0.1 Rodriguez p. 369, Table 1 MRG 120601 from publication 7625571.01 Alcohol acceptance - male raw mean consumption [g/kg body weight] During the past half century, researchers have identified and examined sex differences in alcohol-related phenotypes, focusing more recently on understanding of the mechanisms underlying these differences. In general, the genetic contributions influencing these differences are not consistent with an interpretation of sex linkage and must, therefore, reflect some form of sex limitation in which allelic differences at particular autosomal loci have different consequences in males and females. Significant sex differences in measures of alcohol consumption in mice have been demonstrated in previous work in our laboratory. To investigate these differences further, we explore the limiting case of sex-exclusive effects using data from (BXD) recombinant inbred (RI) strains of mice and from an intercross derived from the same progenitors, C57BL/6J (B) and DBA/2J (D). By the use of two statistical approaches (examination of residual scores as a sex-exclusive phenotypic value for the RI strains and multivariate regression on sex and genotype in the F(2)) we have identified and confirmed female-exclusive markers for alcohol acceptance on chromosomes 9 and 12 and one marker for alcohol preference on chromosome 2. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:647-652, 1999. Copyright 1999 Wiley-Liss, Inc. Fernandez JR, Vogler GP, Tarantino LM, Vignetti S, Plomin R, McClearn GE Sex-exclusive quantitative trait loci influences in alcohol-related phenotypes Am J Med Genet 88(6) 647-652 Dec 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10581484&dopt=Abstract 10581484 02 74-91 days 74 91 Male ~50 g/kg body weight 16.10 14.96 15.26 13.48 11.28 9.47 16.78 14.75 10.03 10.40 14.77 7.08 10.92 16.47 14.66 4.85 13.25 12.06 11.73 15.57 9.38 15.58 11.02 6/5/2003 MK Sullivan Nathan Copeland ACCB alcohol acceptance 10581484.02 Alcohol acceptance - female raw mean consumption [g/kg body weight] During the past half century, researchers have identified and examined sex differences in alcohol-related phenotypes, focusing more recently on understanding of the mechanisms underlying these differences. In general, the genetic contributions influencing these differences are not consistent with an interpretation of sex linkage and must, therefore, reflect some form of sex limitation in which allelic differences at particular autosomal loci have different consequences in males and females. Significant sex differences in measures of alcohol consumption in mice have been demonstrated in previous work in our laboratory. To investigate these differences further, we explore the limiting case of sex-exclusive effects using data from (BXD) recombinant inbred (RI) strains of mice and from an intercross derived from the same progenitors, C57BL/6J (B) and DBA/2J (D). By the use of two statistical approaches (examination of residual scores as a sex-exclusive phenotypic value for the RI strains and multivariate regression on sex and genotype in the F(2)) we have identified and confirmed female-exclusive markers for alcohol acceptance on chromosomes 9 and 12 and one marker for alcohol preference on chromosome 2. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:647-652, 1999. Copyright 1999 Wiley-Liss, Inc. Fernandez JR, Vogler GP, Tarantino LM, Vignetti S, Plomin R, McClearn GE Sex-exclusive quantitative trait loci influences in alcohol-related phenotypes Am J Med Genet 88(6) 647-652 Dec 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10581484&dopt=Abstract 10581484 03 74-91 days 74 91 Female ~50 g/kg body weight 15.99 15.76 18.53 17.07 12.59 12.75 18.78 16.25 14.75 18.84 21.47 1351 15.41 18.35 15.70 10.10 13.48 10.88 9.63 17.43 12.82 18.18 11.05 6/5/2003 MK Sullivan Nathan Copeland ACCB alcohol acceptance 10581484.03 Alcohol acceptance - male residual [g/kg body weight] During the past half century, researchers have identified and examined sex differences in alcohol-related phenotypes, focusing more recently on understanding of the mechanisms underlying these differences. In general, the genetic contributions influencing these differences are not consistent with an interpretation of sex linkage and must, therefore, reflect some form of sex limitation in which allelic differences at particular autosomal loci have different consequences in males and females. Significant sex differences in measures of alcohol consumption in mice have been demonstrated in previous work in our laboratory. To investigate these differences further, we explore the limiting case of sex-exclusive effects using data from (BXD) recombinant inbred (RI) strains of mice and from an intercross derived from the same progenitors, C57BL/6J (B) and DBA/2J (D). By the use of two statistical approaches (examination of residual scores as a sex-exclusive phenotypic value for the RI strains and multivariate regression on sex and genotype in the F(2)) we have identified and confirmed female-exclusive markers for alcohol acceptance on chromosomes 9 and 12 and one marker for alcohol preference on chromosome 2. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:647-652, 1999. Copyright 1999 Wiley-Liss, Inc. Fernandez JR, Vogler GP, Tarantino LM, Vignetti S, Plomin R, McClearn GE Sex-exclusive quantitative trait loci influences in alcohol-related phenotypes Am J Med Genet 88(6) 647-652 Dec 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10581484&dopt=Abstract 10581484 01 74-91 days 74 91 Male ~50 g/kg body weight 2.97 1.98 0.46 -0.36 0.39 -1.53 1.82 1.44 -2.28 -4.46 -1.97 -4.42 -1.83 1.78 1.72 -4.40 1.77 2.29 2.79 1.49 -1.67 1.00 1.15 6/5/2003 MK Sullivan Nathan Copeland ACCB alcohol acceptance 10581484.01 Alcohol acceptance - female residual [g/kg body weight] During the past half century, researchers have identified and examined sex differences in alcohol-related phenotypes, focusing more recently on understanding of the mechanisms underlying these differences. In general, the genetic contributions influencing these differences are not consistent with an interpretation of sex linkage and must, therefore, reflect some form of sex limitation in which allelic differences at particular autosomal loci have different consequences in males and females. Significant sex differences in measures of alcohol consumption in mice have been demonstrated in previous work in our laboratory. To investigate these differences further, we explore the limiting case of sex-exclusive effects using data from (BXD) recombinant inbred (RI) strains of mice and from an intercross derived from the same progenitors, C57BL/6J (B) and DBA/2J (D). By the use of two statistical approaches (examination of residual scores as a sex-exclusive phenotypic value for the RI strains and multivariate regression on sex and genotype in the F(2)) we have identified and confirmed female-exclusive markers for alcohol acceptance on chromosomes 9 and 12 and one marker for alcohol preference on chromosome 2. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:647-652, 1999. Copyright 1999 Wiley-Liss, Inc. Fernandez JR, Vogler GP, Tarantino LM, Vignetti S, Plomin R, McClearn GE Sex-exclusive quantitative trait loci influences in alcohol-related phenotypes Am J Med Genet 88(6) 647-652 Dec 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10581484&dopt=Abstract 10581484 04 74-91 days 74 91 Female ~50 g/kg body weight -1.54 -1.00 1.56 1.29 -1.72 -0.34 0.79 -0.37 1.28 5.12 4.83 2.02 1.35 0.58 -0.87 0.09 -2.14 -3.95 -4.98 0.26 -0.21 1.00 -3.08 6/5/2003 MK Sullivan Nathan Copeland ACCB alcohol acceptance 10581484.04 Alcohol preference - female [g/kg] Although the recombinant inbred strain method was designed for molecular genetic analysis of linkage, it also provides powerful quantitative genetic analyses of heritability and genetic correlations. Measures of alcohol acceptance, alcohol preference, and hypnotic dose sensitivity (HDS) were assessed in 21 strains of mice from the BXD RI series. Sex differences were found to be significant at a phenotypic level. However, heritability estimates for acceptance, preference, and HDS are similar in males and females. Heritability estimates for the three measures are approximately 0.20 for acceptance and preference, and 0.10 for HDS. Analyses of genetic correlations reveal that acceptance and preference share some degree of genetic influence, although they mostly operate under different genetically mediated mechanisms. HDS did not show a significant genetic relationship to either acceptance or preference. Strong correlations were obtained when acceptance, preference, and HDS strain means were correlated across male and female recombinant inbreds, suggesting substantial genetic similarity across sexes. Rodriguez LA, Plomin R, Blizard DA, Jones BC, McClearn GE Alcohol acceptance, preference, and sensitivity in mice. I. Quantitative genetic analysis using BXD recombinant inbred strains Alcohol Clin Exp Res 18(6) 1416-1422 Dec 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7695038&dopt=Abstract 7695038 95209059 03 50-70 days 50 70 Female 8-20 avg g/kg 16.92 2.64 5.56 6.51 4.59 8.03 4.28 3.33 4.98 4.81 2.4 3.2 9.61 4.06 4.7 4.29 3.15 7.95 8.39 6.63 3.91 10.49 2.19 7/11/2003 MK Sullivan 7695038.03 Alcohol preference - male [g/kg] Although the recombinant inbred strain method was designed for molecular genetic analysis of linkage, it also provides powerful quantitative genetic analyses of heritability and genetic correlations. Measures of alcohol acceptance, alcohol preference, and hypnotic dose sensitivity (HDS) were assessed in 21 strains of mice from the BXD RI series. Sex differences were found to be significant at a phenotypic level. However, heritability estimates for acceptance, preference, and HDS are similar in males and females. Heritability estimates for the three measures are approximately 0.20 for acceptance and preference, and 0.10 for HDS. Analyses of genetic correlations reveal that acceptance and preference share some degree of genetic influence, although they mostly operate under different genetically mediated mechanisms. HDS did not show a significant genetic relationship to either acceptance or preference. Strong correlations were obtained when acceptance, preference, and HDS strain means were correlated across male and female recombinant inbreds, suggesting substantial genetic similarity across sexes. Rodriguez LA, Plomin R, Blizard DA, Jones BC, McClearn GE Alcohol acceptance, preference, and sensitivity in mice. I. Quantitative genetic analysis using BXD recombinant inbred strains Alcohol Clin Exp Res 18(6) 1416-1422 Dec 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7695038&dopt=Abstract 7695038 95209059 04 50-70 days 50 70 Male 9-21 avg g/kg 12.84 2.07 3.32 3.65 3.68 4.69 4.98 2.64 5.05 5.2 2.03 2.15 4.08 2.18 4.57 3.73 2.34 7.25 6.37 6.84 5.06 8.04 2.32 7/11/2003 MK Sullivan 7695038.04 alcohol preference - consumption of 10% ethanol vs. water over 15 days [g/kg] Quantitative trait loci (QTL) mapping of complex phenotypes has emerged as an important feature of the recombinant inbred (RI) strain methodology. In this second study of our series on alcohol-related behaviors in mice, we examine alcohol acceptance, preference, and hypnotic dose sensitivity (HDS) to a standard dose of alcohol measured in BXD RI strains to identify candidate QTL regions responsible for their heritability. We detected highly significant marker associations for acceptance on chromosome 12 (Eif4e), for preference on chromosome 1 (D1Rti2) and chromosome 7 (D7Mit7), and for HDS on chromosome 7 (Mpmv1). These are the strongest QTL associations that we detected, but several other candidate QTL regions are reported. Given the limited number of BXD RI strains available, the large number of markers used herein, and the consequent chance of identifying false marker associations, these RI QTL mapping results must be seen as tentative, but an important first step toward identifying QTL for alcohol-related behaviors. Rodriguez LA,Ê Plomin R,ÊBlizard DA,ÊJones BC,Ê McClearn GE. Alcohol acceptance, preference, and sensitivity in mice. II. Quantitative trait loci mapping analysis using BXD recombinant inbred strains. Alcohol Clin Exp Res 19(2) 367-373 Apr 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7625571&dopt=Abstract 7625571 95351511 02 50-70 days 50 70 MF 18-41 g/kg 14.83 2.35 4.44 5.08 4.13 6.36 4.67 2.98 5.02 5 2.22 2.7 6.54 3.07 4.64 4.01 2.72 7.6 7.83 6.73 4.49 9.27 2.25 7/11/2003 MK Sullivan ACCB alcohol acceptance Preference PREFER EtOH 0.1 Rodriguez p. 369, Table 1 MRG 120601 from publication 7625571.02 Alcohol preference - male raw mean consumption [g/kg body weight] During the past half century, researchers have identified and examined sex differences in alcohol-related phenotypes, focusing more recently on understanding of the mechanisms underlying these differences. In general, the genetic contributions influencing these differences are not consistent with an interpretation of sex linkage and must, therefore, reflect some form of sex limitation in which allelic differences at particular autosomal loci have different consequences in males and females. Significant sex differences in measures of alcohol consumption in mice have been demonstrated in previous work in our laboratory. To investigate these differences further, we explore the limiting case of sex-exclusive effects using data from (BXD) recombinant inbred (RI) strains of mice and from an intercross derived from the same progenitors, C57BL/6J (B) and DBA/2J (D). By the use of two statistical approaches (examination of residual scores as a sex-exclusive phenotypic value for the RI strains and multivariate regression on sex and genotype in the F(2)) we have identified and confirmed female-exclusive markers for alcohol acceptance on chromosomes 9 and 12 and one marker for alcohol preference on chromosome 2. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:647-652, 1999. Copyright 1999 Wiley-Liss, Inc. Fernandez JR, Vogler GP, Tarantino LM, Vignetti S, Plomin R, McClearn GE Sex-exclusive quantitative trait loci influences in alcohol-related phenotypes Am J Med Genet 88(6) 647-652 Dec 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10581484&dopt=Abstract 10581484 05 53-67 days 53 67 Male ~50 g/kg body weight 3.31 3.60 3.68 4.66 3.82 2.68 5.75 4.82 1.97 2.27 4.09 2.22 4.43 4.46 3.68 2.22 6.54 5.64 5.53 5.04 3.01 8.01 2.37 6/5/2003 MK Sullivan Nathan Copeland 10581484.05 Alcohol preference - female raw mean consumption [g/kg body weight] During the past half century, researchers have identified and examined sex differences in alcohol-related phenotypes, focusing more recently on understanding of the mechanisms underlying these differences. In general, the genetic contributions influencing these differences are not consistent with an interpretation of sex linkage and must, therefore, reflect some form of sex limitation in which allelic differences at particular autosomal loci have different consequences in males and females. Significant sex differences in measures of alcohol consumption in mice have been demonstrated in previous work in our laboratory. To investigate these differences further, we explore the limiting case of sex-exclusive effects using data from (BXD) recombinant inbred (RI) strains of mice and from an intercross derived from the same progenitors, C57BL/6J (B) and DBA/2J (D). By the use of two statistical approaches (examination of residual scores as a sex-exclusive phenotypic value for the RI strains and multivariate regression on sex and genotype in the F(2)) we have identified and confirmed female-exclusive markers for alcohol acceptance on chromosomes 9 and 12 and one marker for alcohol preference on chromosome 2. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:647-652, 1999. Copyright 1999 Wiley-Liss, Inc. Fernandez JR, Vogler GP, Tarantino LM, Vignetti S, Plomin R, McClearn GE Sex-exclusive quantitative trait loci influences in alcohol-related phenotypes Am J Med Genet 88(6) 647-652 Dec 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10581484&dopt=Abstract 10581484 06 53-67 days 53 67 Female ~50 g/kg body weight 5.36 6.48 4.09 6.73 4.91 2.96 5.02 4.82 2.25 3.49 11.03 4.05 4.98 4.62 4.19 3.18 6.90 8.38 6.59 3.84 4.78 10.44 2.22 6/5/2003 MK Sullivan Nathan Copeland 10581484.06 Alcohol preference - male residual mean [g/kg body weight] During the past half century, researchers have identified and examined sex differences in alcohol-related phenotypes, focusing more recently on understanding of the mechanisms underlying these differences. In general, the genetic contributions influencing these differences are not consistent with an interpretation of sex linkage and must, therefore, reflect some form of sex limitation in which allelic differences at particular autosomal loci have different consequences in males and females. Significant sex differences in measures of alcohol consumption in mice have been demonstrated in previous work in our laboratory. To investigate these differences further, we explore the limiting case of sex-exclusive effects using data from (BXD) recombinant inbred (RI) strains of mice and from an intercross derived from the same progenitors, C57BL/6J (B) and DBA/2J (D). By the use of two statistical approaches (examination of residual scores as a sex-exclusive phenotypic value for the RI strains and multivariate regression on sex and genotype in the F(2)) we have identified and confirmed female-exclusive markers for alcohol acceptance on chromosomes 9 and 12 and one marker for alcohol preference on chromosome 2. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:647-652, 1999. Copyright 1999 Wiley-Liss, Inc. Fernandez JR, Vogler GP, Tarantino LM, Vignetti S, Plomin R, McClearn GE Sex-exclusive quantitative trait loci influences in alcohol-related phenotypes Am J Med Genet 88(6) 647-652 Dec 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10581484&dopt=Abstract 10581484 07 53-67 days 53 67 Male ~50 g/kg body weight -0.81 -1.05 0.16 -0.10 -0.09 -0.31 1.79 0.96 -0.68 -0.97 -1.18 0.49 0.69 0.69 0.11 -0.88 1.70 0.10 0.83 1.64 -0.83 1.50 -0.27 6/5/2003 MK Sullivan Nathan Copeland 10581484.07 Alcohol preference - female residual mean [g/kg body weight] During the past half century, researchers have identified and examined sex differences in alcohol-related phenotypes, focusing more recently on understanding of the mechanisms underlying these differences. In general, the genetic contributions influencing these differences are not consistent with an interpretation of sex linkage and must, therefore, reflect some form of sex limitation in which allelic differences at particular autosomal loci have different consequences in males and females. Significant sex differences in measures of alcohol consumption in mice have been demonstrated in previous work in our laboratory. To investigate these differences further, we explore the limiting case of sex-exclusive effects using data from (BXD) recombinant inbred (RI) strains of mice and from an intercross derived from the same progenitors, C57BL/6J (B) and DBA/2J (D). By the use of two statistical approaches (examination of residual scores as a sex-exclusive phenotypic value for the RI strains and multivariate regression on sex and genotype in the F(2)) we have identified and confirmed female-exclusive markers for alcohol acceptance on chromosomes 9 and 12 and one marker for alcohol preference on chromosome 2. Am. J. Med. Genet. (Neuropsychiatr. Genet.) 88:647-652, 1999. Copyright 1999 Wiley-Liss, Inc. Fernandez JR, Vogler GP, Tarantino LM, Vignetti S, Plomin R, McClearn GE Sex-exclusive quantitative trait loci influences in alcohol-related phenotypes Am J Med Genet 88(6) 647-652 Dec 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10581484&dopt=Abstract 10581484 08 53-67 days 53 67 Female ~50 g/kg body weight 0.88 1.70 -0.77 0.85 -0.10 -0.87 -1.98 -1.22 -0.85 0.09 5.75 0.70 -0.66 -1.05 -0.67 -0.17 -0.92 1.49 -0.18 -2.43 0.61 1.09 -1.29 6/5/2003 MK Sullivan Nathan Copeland 10581484.08 Antinociceptive responsiveness [%] Among inbred mouse strains, DBA/2 mice are unique because of their poor responsiveness to nitrous oxide (N2O) antinociception. As a first step towards identifying candidate genes involved in determining antinociceptive responsiveness to N2O, male mice from the DBA/2 strain, the more responsive C57BL/6 strain, their B6D2F1 offspring, and 22 BXD recombinant inbred (RI) strains derived from DBA/2 and C57BL/6 mice were exposed to N2O and evaluated using the acetic acid abdominal constriction test. When exposed to 70% N2O, C57BL/6, DBA/2 and B6D2F1 mice exhibited antinociceptive responses of 78, 22 and 55%, respectively. The BXD RI strains demonstrated varying degrees of responsiveness to N2O. Cluster analysis revealed one cluster of 16 strains approximating the C57BL/6 progenitor (61.9-100% antinociceptive response to 70% N2O) and another of six strains around the DBA/2 progenitor (9.1-40% antinociceptive response to 70% N2O). The robust strain differences permitted screening the strain means with 1492 marker loci previously mapped in BXD RI strains. Using a QTL analysis specifically tailored to existing mouse RI strains, we found associations at the 0.01 level on seven chromosomes with the most promising marker loci being Il2ra, Hbb, Hmg1rs7 and Gsl5 on chromosomes 2, 7, 16 and 19, respectively (P < 0.002). Quock RM, Mueller JL, Vaughn LK, Belknap JK Nitrous oxide antinociception in BXD recombinant inbred mouse strains and identification of quantitative trait loci. Brain Research 725(1) 23-29 June 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8828582&dopt=Abstract 8828582 96426288 01 6-7wks 42 49 Male 5 % 77 27 87 70 94 37 80 40 85 60 100 80 74 30 31 96 89 100 10 90 70 24 90 70 6/10/2003 MK Sullivan 8828582.01 Audiogenic seizure susceptibility at 21 days [severity of seizure] Recombinant inbred (RI) strains are valuable not only for detecting major gene segregation and linkage but also for identifying associations between behavior and quantitative trait loci (QTL) that account for relatively small amounts of variation in behaviors for which strain distribution patterns are not bimodal. When applied to published data on genetic markers and on behavior for BXD RI strains, the RI QTL association approach suggests the presence of QTLs on chromosomes 6 and 12 for open-field activity and on chromosomes 1, 2, and 17 for high-pressure seizure susceptibility. Because the RI QTL approach does not require that the progenitor inbred strains of a particular RI series differ, researchers could focus on the BXD RI series, for which the greatest number of genetic markers are available. Focusing on BXD would capitalize on the cumulative nature of RI research which permits analyses of QTL sources of genetic correlations across studies. Plomin R, McClearn GE, Gora-Maslak G,Ê Neiderhiser JM. Use of recombinant inbred strains to detect quantitative trait loci associated with behavior. Behav Genet 277(2) 99-116 Mar 1991 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2049054&dopt=Abstract 2049054 91264768 01 21 days 21 Severity of seizure; 0=no response, 1=wild running, 2=clonic seizure, 3=tonic seizure .25 2.75 .25 2.25 2.25 .25 1.75 2.75 1.25 .25 .25 .25 2.75 .25 1.25 2.75 1.25 1.25 .25 1.75 1.25 .25 .25 7/14/2003 MK Sullivan 2049054.01 Response to auditory stimulus US in contextualized fear conditioning paradigm [% freezing] Fear conditioning shows associations formed between contextual or auditory stimuli with an unconditioned stimulus. Inbred mouse strains differ in their ability to demonstrate fear conditioning, suggesting at least a partial genetic influence. The present study identified the possible chromosomal loci regulating fear conditioning in BXD recombinant inbred strains using quantitative trait loci (QTL) analysis. Estimates of heritability for all 3 measures of conditioning were about .28. Correlational analyses between genetic markers and strain means identified multiple putative QTLs. The strongest associations were on Chromosomes 1 and 17 for freezing to the context, Chromosome 12 for freezing to an altered context, and Chromosome 1 for freezing to the auditory stimulus. Overlapping QTLs may indicate some common genes that underlie aspects of this learning task. Owen EH, Christensen SC, Paylor R, Wehner JM Identification of quantitative trait loci involved in contextual and auditory-cued fear conditioning in BXD recombinant inbred strains. Behav Neurosci 111(2) 292-300 Apr 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9106670&dopt=Abstract 9106670 97260550 01 60-134 days 60 134 MF 9-20 % freezing 70 5.62 60 5.46 62 5.38 45 7.15 20 4.38 51 7.62 60 5.23 100 1.23 40 6.62 64 6.38 32 5.00 18 4.54 20 5.23 67 8.62 61 3.90 64 3.77 41 9.15 50 5.92 53 5.77 61 5.31 64 6.54 62 5.38 65 4.62 6/12/2003 MK Sullivan 9106670.01 Body weight [g] PURPOSE: Vision is critically dependent on genetic factors that influence the rate and duration of eye growth. The genetic basis of variation in eye size in mice was explored, and genes that modulate eye weight, lens weight, and retinal area were mapped. METHODS: Eyes of approximately 700 mice were weighed. Data were corrected by regression analysis to eliminate effects of sex, age, and body weight. Interval mapping was used to locate quantitative trait loci (QTLs) using recombinant inbred strains and F2 intercrosses between strains C57BL/6J and DBA/2J. RESULTS: Major QTLs were discovered near the centromere of chromosome 5 (Eye1: genomewide P < 0.005) and on proximal chromosome 17 near the mast cell protease 6 gene (Eye2, P < 0.05). Both QTLs have significant effects on eye size, lens weight, and retinal area. The DBA/2J alleles at Eye1 and Eye2 are partially dominant and increase eye weight by as much as 1.0 mg. Analysis of 183 F2 progeny confirmed and refined the chromosomal assignments of both Eye1 and Eye2. CONCLUSIONS: Eye1 and Eye2 are the first loci known to control normal variation in eye size in any mammal. The hepatic growth factor gene (Hgf), a potent mitogen expressed in the retina, pigment epithelium, and choroid, is a strong candidate for Eye1. The human homolog of Eye2 should map to chromosome 6p, 16q13.3, or 19q13, whereas that of Eye1 should map to 7q. Zhou G, Williams RW Eye1 and Eye2: gene loci that modulate eye size, lens weight, and retinal area in the mouse. Invest Ophthalmol Vis Sci 40(5) 817-825 Apr 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10102277&dopt=Abstract 10102277 99200400 01 106 days 106 MF 8-35 g 21.2 20.3 21.1 22.9 19.9 19.3 19.3 23.4 21 18.8 21.8 22.8 23.6 22 21 18.7 17.9 22.2 21.7 18.5 21.8 17.5 19.6 21.8 19 17.3 22.1 22 6/12/2003 MK Sullivan 10102277.01 Brain methamphetamine levels after 8 mg/kg methamphetamine [micrograms/gm] Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains. J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 09 10-14 wks 70 98 MF 8 micrograms/gm 2 0.39 2.5 0.64 3.8 0.96 1.5 0.31 2.1 0.23 1.9 0.32 2.9 0.60 2.5 0.46 2.7 0.74 2.7 0.43 2.7 0.47 3.8 0.62 2.8 0.71 1.8 0.39 2.1 0.51 2.9 0.88 2.1 0.63 1.8 0.26 2.3 0.40 1.9 0.41 0.8 0.19 2 0.60 2.7 0.79 2 0.80 2.5 0.55 2.8 0.59 2.1 0.71 6/4/2003 MK Sullivan 8987796.09 Brain weight [mg] Common genetic polymorphisms-as opposed to rare mutations-generate almost all heritable differences in the size and structure of the CNS. Surprisingly, these normal variants have not previously been mapped or cloned in any vertebrate species. In a recent paper (), we suggested that much of the variation in retinal ganglion cell number in mice, and the striking bimodality of strain averages, are caused by one or two quantitative trait loci (QTLs). To test this idea, and to map genes linked to this variable and highly heritable quantitative trait, we have counted ganglion cells in 38 recombinant inbred strains (BXD and BXH) derived from parental strains that have high and low cell numbers. A genome-wide search using simple and composite interval-mapping techniques revealed a major QTL on chromosome (Chr) 11 in a 3 cM interval between Hoxb and Krt1 (LOD = 6.8; genome-wide p = 0.001) and possible subsidiary QTLs on Chr 2 and Chr 8. The Chr 11 locus, neuron number control 1 (Nnc1), accounts for one third of the genetic variance among BXH strains and more than half of that among BXD strains, but Nnc1 has no known effects on brain weight, eye weight, or total retinal cell number. Three strong candidate genes have been mapped previously to the same region as Nnc1. These genes-Rara, Thra, and Erbb2- encode receptors for retinoic acid, thyroxine, and neuregulin, respectively. Each receptor is expressed in the retina during development, and their ligands affect the proliferation or survival of retinal cells. Williams RW, Strom RC., Goldowitz D Natural variation in neuron number in mice is linked to a major quantitative trait locus on Chr 11. J Neurosci 18(1) 138-46 Jan 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9412494&dopt=Abstract 9412494 98075112 01 100 days 100 MF 5-11 mg 475 412 465 432 526 388 412 422 437 434 427 442 443 469 427 431 398 443 457 434 391 431 393 407 413 399 426 434 6/18/2003 MK Sullivan 9412494.01 Brain weight [mg] [strains 33 to 42 calculated 6/28/00] PURPOSE: Vision is critically dependent on genetic factors that influence the rate and duration of eye growth. The genetic basis of variation in eye size in mice was explored, and genes that modulate eye weight, lens weight, and retinal area were mapped. METHODS: Eyes of approximately 700 mice were weighed. Data were corrected by regression analysis to eliminate effects of sex, age, and body weight. Interval mapping was used to locate quantitative trait loci (QTLs) using recombinant inbred strains and F2 intercrosses between strains C57BL/6J and DBA/2J. RESULTS: Major QTLs were discovered near the centromere of chromosome 5 (Eye1: genomewide P < 0.005) and on proximal chromosome 17 near the mast cell protease 6 gene (Eye2, P < 0.05). Both QTLs have significant effects on eye size, lens weight, and retinal area. The DBA/2J alleles at Eye1 and Eye2 are partially dominant and increase eye weight by as much as 1.0 mg. Analysis of 183 F2 progeny confirmed and refined the chromosomal assignments of both Eye1 and Eye2. CONCLUSIONS: Eye1 and Eye2 are the first loci known to control normal variation in eye size in any mammal. The hepatic growth factor gene (Hgf), a potent mitogen expressed in the retina, pigment epithelium, and choroid, is a strong candidate for Eye1. The human homolog of Eye2 should map to chromosome 6p, 16q13.3, or 19q13, whereas that of Eye1 should map to 7q. Zhou G, Williams RW Eye1 and Eye2: gene loci that modulate eye size, lens weight, and retinal area in the mouse. Invest Ophthalmol Vis Sci 40(5) 817-825 Apr 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10102277&dopt=Abstract 10102277 99200400 02 106 days 106 MF 8-35 mg 475 412 465 432 526 388 412 422 437 434 427 442 443 469 427 431 398 443 457 434 391 431 393 407 413 399 426 434 427.3 417.3 415.4 406.6 410.6 418.1 401.8 431.7 448.6 6/12/2003 MK Sullivan 10102277.02 Bronchial constrictor response- after exposure to atracurium [APTI (airway pressure time index)] [cmH2O.s] Asthma is a complex heritable inflammatory disorder of the airways associated with clinical signs of atopy and bronchial hyperresponsiveness. Recent studies localized a major gene for asthma to chromosome 5q31-q33 in humans. Thus, this segment of the genome represents a candidate region for genes that determine susceptibility to bronchial hyperresponsiveness and atopy in animal models. Homologs of candidate genes on human chromosome 5q31-q33 are found in four regions in the mouse genome, two on chromosome 18,Êand one each on chromosomes 11Êand 13.ÊWe assessed bronchial responsiveness as a quantitative trait in mice and found it linked to chromosome 13.ÊInterleukin 9Ê(IL-9) is located in the linked region and was analyzed as a gene candidate. The expression of IL-9 was markedly reduced in bronchial hyporesponsive mice, and the level of expression was determined by sequences within the qualitative trait locus (QTL). These data suggest a role for IL-9 in the complex pathogenesis of bronchial hyperresponsiveness as a risk factor for asthma. Nicolaides NC, Holroyd KJ, Ewart SL, Eleff SM, Kiser MB, Dragwa CR, Sullivan CD, Grasso L, Zhang LY, Messler CJ, Zhou T, Kleeberger SR, Buetow KH, Levitt RC. Interleukin 9: a candidate gene for asthma. Proc Natl Acad Sci USA 94(24) 13175-13180 Nov 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9371819&dopt=Abstract 9371819 01 5-6 wks 35 42 MF 2-13 cmH20.s 86 18 404 40 109 15 142 15 65 11 169 8 247 26 273 22 107 10 408 33 281 40 53 13 462 203 521 115 164 13 84 21 317 47 54 24 83 13 984 125 570 120 291 14 102 23 346 48 304 21 142 15 6/11/2003 MK Sullivan Nathan Copeland 9371819.01 Quiescent stem cells in old mice-cobblestone area forming cells (CAFC) day 35 frequency in bone marrow [105 BM cells] To address the fundamental question of whether or not stem cell populations age, we performed quantitative measurements of the cycling status and frequency of hematopoietic stem cells in long-lived C57BL/6 (B6) and short-lived DBA/2 (DBA) mice at different developmental and aging stages. The frequency of cobblestone area-forming cells (CAFC) day-35 in DBA fetal liver was twofold to threefold higher than in B6 mice, and by late gestation, the total stem cell number was nearly as large as that of young DBA adults. Following a further approximately 50% increase in stem cells between 6 weeks and 1 year of age, numbers in old DBA mice dropped precipitously between 12 and 20 months of age. In marked contrast, this stem cell population in B6 mice increased at a constant rate from late gestation to 20 months of age with no signs of abatement. Throughout development an inverse correlation was observed between stem cell numbers and the percentage of cells in S-phase. Because a strong genetic component contributed to the changes in stem cell numbers during aging, we quantified stem cells of 20-month old BXD recombinant inbred (RI) mice, derived from B6 and DBA progenitor strains, thus permitting detailed interstrain genetic analysis. For each BXD strain we calculated the stem cell increase or decrease as mice aged from 2 to 20 months. Net changes in CAFC-day 35 numbers among BXD strains ranged from an approximately 10-fold decrease to an approximately 10-fold increase. A genome-wide search for loci associated with this quantitative trait was performed. Several loci contribute to the trait-putative loci map to chromosomes X, 2, and 14. We conclude that stem cell numbers fluctuate widely during aging and that this has a strong genetic basis. de Haan G, Van Zant G Dynamic changes in mouse hematopoietic stem cell numbers during aging. Blood 93(10) 3294-3301 May 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10233881&dopt=Abstract 10233881 99252083 01 2 months 60 62 Female 105 BM cells 1.5 3 1.5 2 3.5 8 2 3 2 2.5 2.5 2 2 2 2 1 2 3 0.5 3 3.3 3.5 6/9/2003 MK Sullivan 10233881.01 Quiescent stem cells in aged mice-cobblestone area forming cells (CAFC) day 35 frequency in bone marrow [105 BM cells] To address the fundamental question of whether or not stem cell populations age, we performed quantitative measurements of the cycling status and frequency of hematopoietic stem cells in long-lived C57BL/6 (B6) and short-lived DBA/2 (DBA) mice at different developmental and aging stages. The frequency of cobblestone area-forming cells (CAFC) day-35 in DBA fetal liver was twofold to threefold higher than in B6 mice, and by late gestation, the total stem cell number was nearly as large as that of young DBA adults. Following a further approximately 50% increase in stem cells between 6 weeks and 1 year of age, numbers in old DBA mice dropped precipitously between 12 and 20 months of age. In marked contrast, this stem cell population in B6 mice increased at a constant rate from late gestation to 20 months of age with no signs of abatement. Throughout development an inverse correlation was observed between stem cell numbers and the percentage of cells in S-phase. Because a strong genetic component contributed to the changes in stem cell numbers during aging, we quantified stem cells of 20-month old BXD recombinant inbred (RI) mice, derived from B6 and DBA progenitor strains, thus permitting detailed interstrain genetic analysis. For each BXD strain we calculated the stem cell increase or decrease as mice aged from 2 to 20 months. Net changes in CAFC-day 35 numbers among BXD strains ranged from an approximately 10-fold decrease to an approximately 10-fold increase. A genome-wide search for loci associated with this quantitative trait was performed. Several loci contribute to the trait-putative loci map to chromosomes X, 2, and 14. We conclude that stem cell numbers fluctuate widely during aging and that this has a strong genetic basis. de Haan G, Van Zant G Dynamic changes in mouse hematopoietic stem cell numbers during aging. Blood 93(10) 3294-3301 May 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10233881&dopt=Abstract 10233881 99252083 02 20 months 600 620 Female 105 BM cells 4 1 1 12 11.5 2 4.5 7 21 3.3 6 3.3 4 2.5 2.5 6 4 4 0.1 6.5 2 3.5 6/9/2003 MK Sullivan 10233881.02 Chlordiazepoxide 10 mg/kg induced locomotor response distance traveled, 0-5 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 01 8-12 wks 56 84 Male 3-15 cm -696 292 -81 123 -716 282 -40 182 -9 448 -284 391 197 163 919 668 112 156 -509 310 -594 250 216 233 7 239 668 276 335 299 744 295 76 115 787 282 -113 208 739 317 -39 304 -413 337 387 280 742 291 204 328 328 268 299 200 6/6/2003 MK Sullivan 9880575.01 Chlordiazepoxide 10 mg/kg induced locomotor response distance traveled, 5-10 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 02 8-12wks 56 84 Male 3-15 cm -459 253 863 307 -248 283 -487 209 -36 410 -18 446 -1623 286 1166 246 1306 119 -451 365 132 370 -1104 304 1377 407 10 431 -39 228 510 505 -246 299 -448 295 256 545 174 393 -86 294 -497 574 409 278 1909 316 -590 283 527 331 500 370 6/6/2003 MK Sullivan 9880575.02 Chlordiazepoxide 10 mg/kg induced locomotor response distance traveled, 10-15 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 03 8-12wks 56 84 Male 3-15 cm -69 352 875 219 -462 245 -846 231 -137 413 -285 269 -2600 262 518 381 477 773 -642 239 443 414 -1036 171 1013 337 266 372 -403 306 453 487 -520 255 -743 297 104 378 -390 370 -110 345 -555 658 9 170 903 362 -28 281 774 305 419 345 6/6/2003 MK Sullivan 9880575.03 Chlordiazepoxide 10 mg/kg induced locomotor response distance traveled, 15-20 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 04 8-12wks 56 84 Male 3-15 cm 297 156 857 293 -817 248 -705 170 -358 318 -425 269 -2564 356 319 284 -383 707 -888 242 268 390 -835 359 814 387 367 347 -828 309 -40 420 -354 319 -622 335 825 552 -351 206 -132 365 -1058 181 -340 206 1059 399 -312 160 233 371 504 314 6/6/2003 MK Sullivan 9880575.04 Chlordiazepoxide 10 mg/kg induced locomotor response distance traveled, 5-20 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 05 8-12wks 56 84 Male 3-15 cm -231 761 2595 819 -1526 776 -2039 610 -531 1141 -727 985 -6786 903 2002 911 1401 1600 -1981 846 843 1174 -2974 833 3204 1131 643 1149 -1270 843 923 1412 -1119 873 -1812 926 1185 1475 -567 969 -327 1005 -2110 1413 78 653 3870 1077 -930 724 1534 1007 1423 1030 6/6/2003 MK Sullivan 9880575.05 Cerebellum weight [mg] To discover genes influencing cerebellum development, we conducted a complex trait analysis of variation in the size of the adult mouse cerebellum. We analyzed two sets of recombinant inbred BXD strains and an F2 intercross of the common inbred strains, C57BL/6J and DBA/2J. We measured cerebellar size as the weight or volume of fixed or histologically processed tissue. Among BXD recombinant inbred strains, the cerebellum averages 52 mg (12.4% of the brain) and ranges 18 mg in size. In F2 mice, the cerebellum averages 62 mg (12.9% of the brain) and ranges approximately 20 mg in size. Five quantitative trait loci (QTLs) that significantly control variation in cerebellar size were mapped to chromosomes 1 (Cbs1a), 8 (Cbs8a), 14 (Cbs14a), and 19 (Cbs19a, Cbs19b). In combination, these QTLs can shift cerebellar size an appreciable 35% of the observed range. To assess regional genetic control of the cerebellum, we also measured the volume of the cell-rich, internal granule layer (IGL) in a set of BXD strains. The IGL ranges from 34 to 43% of total cerebellar volume. The QTL Cbs8a is significantly linked to variation in IGL volume and is suggestively linked to variation in the number of cerebellar folia. The QTLs we have discovered are among the first loci shown to modulate the size and architecture of the adult mouse cerebellum. Airey DC, Lu L, Williams RW. Genetic control of the mouse cerebellum: identification of quantitative trait loci modulating size and architecture. J Neurosci 21(14) 5099-5109 Jul 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11438585&dopt=Abstract 11438585 01 30-300 days 30 300 MF 4-7 mg 61.4 2.38 49.0 1.25 62.5 2.32 53.1 1.22 59.1 2.07 53.9 1.05 53.1 1.10 45.9 1.09 48.4 1.63 49.4 0.44 47.4 1.15 56.3 1.21 53.6 1.44 50.1 1.42 48.2 1.67 50.6 1.31 53.8 1.51 48.6 1.03 54.9 1.92 49.6 0.81 47.4 2.25 51.5 0.87 50.2 0.56 53.6 1.14 49.7 0.91 56.0 1.19 52.1 0.66 53.7 1.22 49.7 2.03 44.5 0.73 51.1 1.79 54.9 0.87 49.9 1.13 59.4 0.95 12/20/2002 11438585.01 Stem cell cycling - change in day 7 cobblestone area forming cell (CAFC) frequency during aging [%CAFC] To address the fundamental question of whether or not stem cell populations age, we performed quantitative measurements of the cycling status and frequency of hematopoietic stem cells in long-lived C57BL/6 (B6) and short-lived DBA/2 (DBA) mice at different developmental and aging stages. The frequency of cobblestone area-forming cells (CAFC) day-35 in DBA fetal liver was twofold to threefold higher than in B6 mice, and by late gestation, the total stem cell number was nearly as large as that of young DBA adults. Following a further approximately 50% increase in stem cells between 6 weeks and 1 year of age, numbers in old DBA mice dropped precipitously between 12 and 20 months of age. In marked contrast, this stem cell population in B6 mice increased at a constant rate from late gestation to 20 months of age with no signs of abatement. Throughout development an inverse correlation was observed between stem cell numbers and the percentage of cells in S-phase. Because a strong genetic component contributed to the changes in stem cell numbers during aging, we quantified stem cells of 20-month old BXD recombinant inbred (RI) mice, derived from B6 and DBA progenitor strains, thus permitting detailed interstrain genetic analysis. For each BXD strain we calculated the stem cell increase or decrease as mice aged from 2 to 20 months. Net changes in CAFC-day 35 numbers among BXD strains ranged from an approximately 10-fold decrease to an approximately 10-fold increase. A genome-wide search for loci associated with this quantitative trait was performed. Several loci contribute to the trait-putative loci map to chromosomes X, 2, and 14. We conclude that stem cell numbers fluctuate widely during aging and that this has a strong genetic basis. de Haan G, Van Zant G Dynamic changes in mouse hematopoietic stem cell numbers during aging. Blood 93(10) 3294-3301 May 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10233881&dopt=Abstract 10233881 99252083 03 2-20 months 61 610 Female 3-8 % 110 100 125 110 102 98 105 125 75 110 110 102 104 103 120 100 104 105 90 120 85 80 6/9/2003 MK Sullivan 10233881.03 Change in day 21 cobblestone area forming cell (CAFC) frequency during aging [% CAFC] To address the fundamental question of whether or not stem cell populations age, we performed quantitative measurements of the cycling status and frequency of hematopoietic stem cells in long-lived C57BL/6 (B6) and short-lived DBA/2 (DBA) mice at different developmental and aging stages. The frequency of cobblestone area-forming cells (CAFC) day-35 in DBA fetal liver was twofold to threefold higher than in B6 mice, and by late gestation, the total stem cell number was nearly as large as that of young DBA adults. Following a further approximately 50% increase in stem cells between 6 weeks and 1 year of age, numbers in old DBA mice dropped precipitously between 12 and 20 months of age. In marked contrast, this stem cell population in B6 mice increased at a constant rate from late gestation to 20 months of age with no signs of abatement. Throughout development an inverse correlation was observed between stem cell numbers and the percentage of cells in S-phase. Because a strong genetic component contributed to the changes in stem cell numbers during aging, we quantified stem cells of 20-month old BXD recombinant inbred (RI) mice, derived from B6 and DBA progenitor strains, thus permitting detailed interstrain genetic analysis. For each BXD strain we calculated the stem cell increase or decrease as mice aged from 2 to 20 months. Net changes in CAFC-day 35 numbers among BXD strains ranged from an approximately 10-fold decrease to an approximately 10-fold increase. A genome-wide search for loci associated with this quantitative trait was performed. Several loci contribute to the trait-putative loci map to chromosomes X, 2, and 14. We conclude that stem cell numbers fluctuate widely during aging and that this has a strong genetic basis. de Haan G, Van Zant G Dynamic changes in mouse hematopoietic stem cell numbers during aging. Blood 93(10) 3294-3301 May 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10233881&dopt=Abstract 10233881 99252083 04 2-20 months 61 610 Female 3-8 % 180 82 90 200 120 80 125 130 340 108 130 92 130 115 70 110 110 108 60 125 75 108 6/9/2003 MK Sullivan 10233881.04 Quiescent stem cells - change in day 35 CAFC frequency during aging [% CAFC] To address the fundamental question of whether or not stem cell populations age, we performed quantitative measurements of the cycling status and frequency of hematopoietic stem cells in long-lived C57BL/6 (B6) and short-lived DBA/2 (DBA) mice at different developmental and aging stages. The frequency of cobblestone area-forming cells (CAFC) day-35 in DBA fetal liver was twofold to threefold higher than in B6 mice, and by late gestation, the total stem cell number was nearly as large as that of young DBA adults. Following a further approximately 50% increase in stem cells between 6 weeks and 1 year of age, numbers in old DBA mice dropped precipitously between 12 and 20 months of age. In marked contrast, this stem cell population in B6 mice increased at a constant rate from late gestation to 20 months of age with no signs of abatement. Throughout development an inverse correlation was observed between stem cell numbers and the percentage of cells in S-phase. Because a strong genetic component contributed to the changes in stem cell numbers during aging, we quantified stem cells of 20-month old BXD recombinant inbred (RI) mice, derived from B6 and DBA progenitor strains, thus permitting detailed interstrain genetic analysis. For each BXD strain we calculated the stem cell increase or decrease as mice aged from 2 to 20 months. Net changes in CAFC-day 35 numbers among BXD strains ranged from an approximately 10-fold decrease to an approximately 10-fold increase. A genome-wide search for loci associated with this quantitative trait was performed. Several loci contribute to the trait-putative loci map to chromosomes X, 2, and 14. We conclude that stem cell numbers fluctuate widely during aging and that this has a strong genetic basis. de Haan G, Van Zant G Dynamic changes in mouse hematopoietic stem cell numbers during aging. Blood 93(10) 3294-3301 May 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10233881&dopt=Abstract 10233881 99252083 05 2-20 months 61 610 Female 3-8 % 190 75 103 420 190 50 130 130 800 108 130 110 125 110 108 240 125 110 20 135 80 102 6/9/2003 Mk Sullivan 10233881.05 Circadian Period Many genes support the manifestation of the circadian period in mice. In a multiple-gene trait all genes contributing in a minor way to this characteristic are quantitative trait loci (QTL). Screens of both the BXD and the CXB panels of recombinant inbred mice suggested that distal chromosome 1, between 90 and 100 cM, contained a QTL, Cplaq3, for a difference in the circadian period of locomotor activity between the C57BL/6J and the DBA/2J and between the BALB/cBy and the C57BL/6By progenitor strains. The mice studied were a commercially available congenic strain, B6.D2-Mtv7a/Ty, from 50 to 100 days old. This congenic strain contains a small DBA/2J genomic insert that covers the region of the provisional QTL in a 99.9% C57BL/6J background. The congenic mice had a shorter period than C57BL/6J mice, confirming that this region has a QTL for the difference in period between the C57BL/6J and the DBA/2J strains. In addition, these data suggest that this region has a QTL for the mean amount of daily activity and for the pattern of locomotor activity. Mayeda AR, Hofstetter JR A QTL for the genetic variance in free-running period and level of locomotor activity between inbred strains of mice. Behav Genet 29(3) 171-176 May 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10547923&dopt=Abstract 10547923 20015646 01 100 days 100 6/6/2002 10547923.01 Climbing scores after 16 mg/kg i.p. methamphetamine injection [quadrant crossings/min] Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains. J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 10 10-14 wks 70 98 MF 8 quadrant crossings/min 2.3 0.22 0.6 0.28 0.1 0.45 -0.8 0.31 1.5 0.39 -0.8 0.38 0.3 0.32 -0.1 0.21 0.7 0.47 2.6 0.30 -1 0.48 -0.7 0.23 2 0.43 -0.3 0.29 0.4 0.39 0.1 0.17 3.3 0.21 0.7 0.39 0.8 0.51 0.6 0.35 0.6 0.38 1 0.40 -1.4 0.30 2.6 0.14 -0.8 0.48 1.6 0.34 6/4/2003 MK Sullivan 8987796.1 Response to contextual fear [% freezing] Fear conditioning shows associations formed between contextual or auditory stimuli with an unconditioned stimulus. Inbred mouse strains differ in their ability to demonstrate fear conditioning, suggesting at least a partial genetic influence. The present study identified the possible chromosomal loci regulating fear conditioning in BXD recombinant inbred strains using quantitative trait loci (QTL) analysis. Estimates of heritability for all 3 measures of conditioning were about .28. Correlational analyses between genetic markers and strain means identified multiple putative QTLs. The strongest associations were on Chromosomes 1 and 17 for freezing to the context, Chromosome 12 for freezing to an altered context, and Chromosome 1 for freezing to the auditory stimulus. Overlapping QTLs may indicate some common genes that underlie aspects of this learning task. Owen EH, Christensen SC, Paylor R, Wehner JM Identification of quantitative trait loci involved in contextual and auditory-cued fear conditioning in BXD recombinant inbred strains. Behav Neurosci 111(2) 292-300 Apr 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9106670&dopt=Abstract 9106670 97260550 02 60-134 days 60 134 MF 9-20 % freezing 38 0.431 15 0.238 23 5.38 23 5.00 10 1.85 29 10.62 10 2.54 38 5.77 10 2.69 38 5.08 10 2.38 23 5.00 11 3.77 23 5.08 35 3.46 50 4.77 20 3.00 15 3.83 40 3.08 38 3.00 5 1.77 23 2.77 45 5.00 6/12/2003 MK Sullivan 9106670.02 Decrease in body temp after TNF injection [degree C] Administration of recombinant murine tumor necrosis factor (TNF) to mice results in lethal shock, characterized by hypotension, hypothermia, and dramatic induction of cytokines released in the circulation, such as interleukin-6 (IL-6). The sensitivity of mice to the effects of murine TNF varies from strain to strain. DBA/2 mice were found to be considerably more resistant to TNF than C57BL/6 mice. The resistance proved to be dominant since (C57BL/6 x DBA/2)F1 mice were also resistant. Using BXD recombinant inbred mice and a dose of TNF lethal for C57BL/6 but not for DBA/2 mice, we found that the resistance to TNF links to loci coding for corticosteroid-binding globulin (Cbg), alpha1-protease inhibitor (Spi1), contrapsin (Spi2) and the contrapsin-regulating gene Spi2r that form a gene cluster on chromosome 12. Quantitative trait-loci analysis of TNF-induced induction of IL-6 and of hypothermia also points to the importance of this locus (P < 0.0002 and P = 0.017, respectively), more particularly the Cbg and Spi2 loci, in the resistance to TNF. We propose to name the locus "TNF protection locus." The data suggest that endogenous protease inhibitors and/or glucocorticoids play a significant role in the attenuation of TNF-induced lethal shock. This study also demonstrates that loci affecting important biological responses can be identified with very high resolution using recombinant inbred mice. Libert C,ÊWielockx B, Hammond GL,Ê Brouckaert P,ÊFiers W,ÊElliott RW. Identification of a locus on distal mouse chromosome 12 that controls resistance to tumor necrosis factor-induced lethal shock. Genomics 55(3) 284-289 Feb 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10049582&dopt=Abstract 10049582 99168897 01 15 wks 105 Female 2-9 degree C 26.3 2.21 35.1 0.27 30.1 0.59 26.2 1.69 35.4 0.15 35.5 0.18 31.9 0.63 35.6 0.11 31.3 0.94 33.3 0.96 34.5 0.31 23.6 0.58 31.6 0.75 30.4 0.84 30.2 0.25 35.6 0.16 35.4 0.23 31.2 0.56 31.6 0.12 27.2 0.49 26 1.20 34.2 0.78 35.7 0.15 6/9/2003 MK Sullivan 10049582.01 Pentylenetetrazol (PTZ) induced seizure thresholds [mg/kg] Gene mapping of the newly discovered SEZ genes (seizure-related genes) in the mouse was performed by linkage analysis. SEZ6 was on chromosome 11, SEZ12 on chromosome 16, SEZ15 on chromosome 3 and SEZ17 (PTZ17) on chromosome 18. The mouse chromosomal locus related to high susceptibility to pentylenetetrazol (PTZ) was also determined by linkage analysis using the recombinant inbred mouse, BXD (C57BLxDBA). A significant level of PTZ susceptibility was found on chromosome 2. Chromosomal loci of the newly discovered SEZ genes were not coincident with the significant chromosomal loci to PTZ susceptibility. Since epilepsy is assumed to be a disease syndrome which is probably manifested by abnormal expression of multifocal genes, determination of the role of each chromosomal locus in the provocation of seizure activity is important. Wakana S, Sugaya E, Naramoto F, Yokote N, Maruyama C, Jin W, Ohguchi H, Tsuda T, Sugaya A, Kajiwara K. Gene mapping of SEZ group genes and determination of pentylenetetrazol susceptible quantitative trait loci in the mouse chromosome. Brain Res 857(1-2) 286-290 Feb 2000 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10700579&dopt=Abstract 10700579 01 mg/kg 35 7.1 23 2.5 30 4.2 41 4.3 28 2.7 40 7.9 25 2.5 37 2.9 32 4.7 28 3.0 27 3.9 33 2.4 31 1.5 30 0.0 29 6.4 29 3.4 29 3.4 28 2.4 29 3.4 32 5.2 34 2.8 38 4.5 33 3.2 27 3.3 6/6/2002 Nathan Copeland 10700579.01 Imprinting - egg modifier phenotypes [% androgen development] It is now well established that genomic imprinting effects in mammals require a combination of epigenetic modifications imposed during gametogenesis and additional modifications imposed after fertilization. The earliest post-fertilization modifications to be imposed on the genome are those thought to be mediated by factors in the egg cytoplasm. Strain-dependent differences in the actions of these egg modifiers in mice reveal an important potential for genetic variability in the imprinting process, and also provide valuable genetic systems with which to identify some of the factors that participate in imprinting. Previous studies documented a strain-dependent difference in the modification of paternal genome function between the C57BL/6 and DBA/2 mouse strains. This difference is revealed as a difference in developmental potential of androgenetic embryos produced with eggs from females of the two strains by nuclear transplantation. The specificity of the effect for the paternal genome is consistent with an effect on imprinted genes. The egg phenotype is largely independent of the genotype of the fertilizing sperm, and the C57BL/6 phenotype is dominant in reciprocal F1 hybrids. Genetic studies demonstrated that the difference in egg phenotypes between the two strains is most likely controlled by two independently segregating loci. We now report the results of experiments in which the egg phenotypes of the available BxD recombinant inbred mouse strains have been determined. The results of the analysis are consistent with the two locus model, and we have identified candidate chromosomal locations for the two loci. These data demonstrate clearly that differences in how the egg cytoplasm modifies the incoming paternal genome are indeed genetically determined, and vary accordingly. Latham KE, Sapienza C. Localization of genes encoding egg modifiers of paternal genome function to mouse chromosomes one and two. Development 125(5) 929-935 Mar 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9449675&dopt=Abstract 9449675 01 Female % 41 56 23 52 41 50 57 8 46 39 62 71 32 27 10 61 51 46 64 61 44 20 64 49 63 6/6/2002 Nathan Copeland 9449675.01 Ethanol induced locomotor response distance traveled, 0-5 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 06 8-12wks 56 84 Male 4-18 cm 208 321 2284 261 1274 516 323 413 -208 364 1182 324 289 370 308 265 1819 347 925 291 146 375 943 341 1845 410 2042 447 1786 338 1423 389 1228 250 481 269 109 420 683 560 698 403 447 266 486 126 155 600 983 495 414 325 1073 289 6/6/2003 MK Sullivan ETBethanol 9880575.06 Ethanol induced locomotor response distance traveled, 5-10 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 07 8-12wks 56 84 Male 4-18 cm 536 330 1689 353 533 283 -144 293 -504 420 1387 322 -2024 460 459 213 2298 279 392 306 288 224 -119 132 1884 351 2243 436 264 402 2291 437 1904 361 -1116 257 -138 318 -281 444 -378 558 1689 528 566 142 1038 253 902 424 671 216 515 296 6/6/2003 MK Sullivan ETBethanol 9880575.07 Ethanol induced locomotor response distance traveled, 10-15 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 08 8-12wks 56 84 Male 4-18 cm 356 331 1094 233 182 265 -824 280 -1115 348 1344 318 -2458 169 599 249 1244 141 282 199 -354 416 -324 158 1555 427 2235 367 -357 444 1742 498 1693 339 -591 233 -450 260 -319 336 -634 355 800 368 749 203 799 325 758 315 908 301 766 391 6/6/2003 MK Sullivan ETBethanol 9880575.08 Ethanol induced locomotor response distance traveled, 15-20 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 09 8-12wks 56 84 Male 4-18 cm 215 232 739 207 639 336 -936 270 -1376 316 1147 309 -2107 151 578 280 1495 188 -308 296 -857 304 -420 133 1416 422 1799 299 -606 424 1234 241 1406 323 -528 233 -173 248 -380 293 -711 375 319 396 515 269 142 369 1065 211 1225 200 851 238 6/6/2003 MK Sullivan ETBethanol 9880575.09 Ethanol induced locomotor response distance traveled, 5-20 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 10 8-12wks 56 84 Male 4-18 cm 1107 893 3522 793 1354 884 -1905 843 -2995 1083 3879 950 -6588 779 1636 743 5037 608 366 800 -923 944 -864 423 4855 1200 6277 1102 -717 1271 5267 1175 5003 1023 -2235 724 -761 826 -979 1073 -1722 1288 2808 1293 1829 614 1980 947 2725 951 2805 716 2132 924 6/6/2003 MK Sullivan ETBethanol 9880575.1 Eye weight [mg] [strains 33 to 42 calculated 6/28/00] PURPOSE: Vision is critically dependent on genetic factors that influence the rate and duration of eye growth. The genetic basis of variation in eye size in mice was explored, and genes that modulate eye weight, lens weight, and retinal area were mapped. METHODS: Eyes of approximately 700 mice were weighed. Data were corrected by regression analysis to eliminate effects of sex, age, and body weight. Interval mapping was used to locate quantitative trait loci (QTLs) using recombinant inbred strains and F2 intercrosses between strains C57BL/6J and DBA/2J. RESULTS: Major QTLs were discovered near the centromere of chromosome 5 (Eye1: genomewide P < 0.005) and on proximal chromosome 17 near the mast cell protease 6 gene (Eye2, P < 0.05). Both QTLs have significant effects on eye size, lens weight, and retinal area. The DBA/2J alleles at Eye1 and Eye2 are partially dominant and increase eye weight by as much as 1.0 mg. Analysis of 183 F2 progeny confirmed and refined the chromosomal assignments of both Eye1 and Eye2. CONCLUSIONS: Eye1 and Eye2 are the first loci known to control normal variation in eye size in any mammal. The hepatic growth factor gene (Hgf), a potent mitogen expressed in the retina, pigment epithelium, and choroid, is a strong candidate for Eye1. The human homolog of Eye2 should map to chromosome 6p, 16q13.3, or 19q13, whereas that of Eye1 should map to 7q. Zhou G, Williams RW Eye1 and Eye2: gene loci that modulate eye size, lens weight, and retinal area in the mouse. Invest Ophthalmol Vis Sci 40(5) 817-825 Apr 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10102277&dopt=Abstract 10102277 99200400 03 106 days 106 MF 8-35 mg 18.9 0.2 20.2 0.2 20.1 0.4 20.1 0.2 19.6 0.3 19.7 0.3 18.7 0.3 19.4 0.3 20.3 0.3 18.9 0.2 18.2 0.3 18.3 0.2 19.1 0.3 19.3 0.1 17.3 0.4 20.1 0.2 19.4 0.2 15.6 0.4 19.3 0.2 18.4 0.2 16.3 0.3 16.8 0.3 19.2 0.2 17.5 0.2 19.4 0.3 17.8 0.5 20 0.3 20 0.3 F 19.5 6/12/2003 MK Sullivan 10102277.03 Forebrain weight [mg] [raw average from strainDB 6/28/00] Williams RW unpub unpublished 2000 82 100 days 100 MF mg 300.8 295.4 288.4 311.1 323.4 331.2 316.3 275.0 323.9 322.8 288.5 295.2 286.3 260.9 282.7 277.9 257.2 293.4 311.2 12/19/2002 .82 Ethanol induced conditioned place preference - Grid floor preference after 2 g/kg ethanol i.p. paired with grid [s/min] table 3 col 1 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 10 56-125 days 56 125 Male 6-17 s/min 35.6 1.9 36.0 2.5 43.7 2.8 40.9 2.0 32.1 2.3 38.6 2.5 36.2 2.0 36.1 2.5 50.5 2.9 35.7 2.5 33.7 2.8 35.7 2.1 36.1 2.9 40.5 5.0 34.5 1.7 31 1.7 36.3 4.9 45.7 2.9 33.8 1.7 43.5 3.0 31.2 2.9 34.5 1.5 6/23/2003 MK Sullivan 7480533.1 Ethanol induced conditioned place preference - Hole floor preference after 2 g/kg ethanol i.p. paired with hole floor [s/min] table 3 col 2 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 11 56-125 days 56 125 Male 7-17 s/min 25.6 2.3 24.4 3.5 26.0 2.9 25.8 3.7 26.6 2.5 22.8 2.5 22.5 2.0 24.0 1.9 16.0 3.3 26.1 2.8 22.1 2.0 29.4 2.4 19.4 2.2 26.4 4.0 253 2.0 31.5 1.7 17.4 3.8 16.2 3.1 33.7 1.8 23.0 3.9 25.7 3.2 30.5 1.8 6/23/2003 MK Sullivan 7480533.11 High Affinity Choline Uptake (concentration of 0.5*10^-6M) in frontal cortex [pmole/4min/mg protein] Using the quantitative trait loci (QTL) approach, preliminary identification has been made of a region on mouse chromosome 17 that influences high-affinity choline uptake (HACU) in the mouse brain. The rate of HACU was measured in synaptosomes prepared from the frontal cortex, hippocampus, and striatum of C57BL/6J (B6), DBA/2J (D2), and 25 BXD recombinant inbred (RI) strains of mice, using a final concentration of 0.5 microM [3H]choline. The strain means of HACU in each area were then correlated with the strain distribution pattern of each of 1300 known genetic markers using a point biserial correlation and 0 (B6 allele) and 1 (D2 allele). Correlations of P < 0.00001 were found between striatal HACU and chromosome 17 markers D17Tu50 and Tcp1. Correlations of P < 0.0001 were found between striatal HACU and chromosome 17 markers D17Leh66e, D17Leh119, D17Rp17e, Plg, D17Leh66d, Ckb-rs2, and Trp53-ps. QTL analyses of HACU in the frontal cortex and hippocampus also revealed correlations with these markers at the level of P < 0.05 and P < 0.01. These data suggest that at least one locus located on mouse chromosome 17 near or between 6 and 13 cM from the centromere influences HACU in the striatum and possibly the frontal cortex and hippocampus of the mouse. Tarricone BJ, Hwang WG, Hingtgen JN, Mitchell SR, Belknap JK, Nurnberger JI Identification of a locus on mouse chromosome 17 associated with high-affinity choline uptake using BXD recombinant inbred mice and quantitative trait loci analysis Genomics 27(1) 161-164 May 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7665164&dopt=Abstract 7665164 95394453 01 12-14 wks 84 98 Male 4 pmole/4min/mg protein 17.2 1.8 13.1 1.1 18.5 1.8 17.3 2.2 13.7 1.4 15.4 0.9 25 1.3 22.1 1.5 12.8 1.9 17.8 1.7 25.5 2.6 19 5.5 24.4 2.4 17.3 2.0 18.2 2.1 24.9 3.0 23.4 3.0 16.4 1.2 26.8 4.5 19.3 4.1 23.7 2.2 17.3 2.0 21.2 0.4 20.5 1.9 18.7 1.2 12.5 2.0 25.9 1.7 6/11/2003 MK Sullivan 7665164.01 High Affinity Choline Uptake (concentration of 0.5*10^-6M) in hippocampus [pmole/4min/mg protein] Using the quantitative trait loci (QTL) approach, preliminary identification has been made of a region on mouse chromosome 17 that influences high-affinity choline uptake (HACU) in the mouse brain. The rate of HACU was measured in synaptosomes prepared from the frontal cortex, hippocampus, and striatum of C57BL/6J (B6), DBA/2J (D2), and 25 BXD recombinant inbred (RI) strains of mice, using a final concentration of 0.5 microM [3H]choline. The strain means of HACU in each area were then correlated with the strain distribution pattern of each of 1300 known genetic markers using a point biserial correlation and 0 (B6 allele) and 1 (D2 allele). Correlations of P < 0.00001 were found between striatal HACU and chromosome 17 markers D17Tu50 and Tcp1. Correlations of P < 0.0001 were found between striatal HACU and chromosome 17 markers D17Leh66e, D17Leh119, D17Rp17e, Plg, D17Leh66d, Ckb-rs2, and Trp53-ps. QTL analyses of HACU in the frontal cortex and hippocampus also revealed correlations with these markers at the level of P < 0.05 and P < 0.01. These data suggest that at least one locus located on mouse chromosome 17 near or between 6 and 13 cM from the centromere influences HACU in the striatum and possibly the frontal cortex and hippocampus of the mouse. Tarricone BJ, Hwang WG, Hingtgen JN, Mitchell SR, Belknap JK, Nurnberger JI Identification of a locus on mouse chromosome 17 associated with high-affinity choline uptake using BXD recombinant inbred mice and quantitative trait loci analysis Genomics 27(1) 161-164 May 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7665164&dopt=Abstract 7665164 95394453 02 12-14 wks 84 98 Male 4 pmole/4min/mg protein 17.5 1.5 14.2 1.2 17.6 1.6 18.9 1.7 22.4 1.5 18.9 1.4 20.8 3.4 25.9 2.4 21.2 2.3 19.9 0.9 27.7 4.0 22.2 1.5 23.3 2.4 17.4 1.4 19.1 1.4 28.5 2.7 25.2 3.3 21.6 1.8 26.2 3.2 17.9 2.6 36 3.0 21 2.6 22.4 1.2 30.3 3.4 22.8 1.6 17.7 5.7 23.6 4.8 6/11/2003 MK Sullivan 7665164.02 High Affinity Choline Uptake (concentration of 0.5*10^-6M) in striatum [pmole/4min/mg protein] Using the quantitative trait loci (QTL) approach, preliminary identification has been made of a region on mouse chromosome 17 that influences high-affinity choline uptake (HACU) in the mouse brain. The rate of HACU was measured in synaptosomes prepared from the frontal cortex, hippocampus, and striatum of C57BL/6J (B6), DBA/2J (D2), and 25 BXD recombinant inbred (RI) strains of mice, using a final concentration of 0.5 microM [3H]choline. The strain means of HACU in each area were then correlated with the strain distribution pattern of each of 1300 known genetic markers using a point biserial correlation and 0 (B6 allele) and 1 (D2 allele). Correlations of P < 0.00001 were found between striatal HACU and chromosome 17 markers D17Tu50 and Tcp1. Correlations of P < 0.0001 were found between striatal HACU and chromosome 17 markers D17Leh66e, D17Leh119, D17Rp17e, Plg, D17Leh66d, Ckb-rs2, and Trp53-ps. QTL analyses of HACU in the frontal cortex and hippocampus also revealed correlations with these markers at the level of P < 0.05 and P < 0.01. These data suggest that at least one locus located on mouse chromosome 17 near or between 6 and 13 cM from the centromere influences HACU in the striatum and possibly the frontal cortex and hippocampus of the mouse. Tarricone BJ, Hwang WG, Hingtgen JN, Mitchell SR, Belknap JK, Nurnberger JI Identification of a locus on mouse chromosome 17 associated with high-affinity choline uptake using BXD recombinant inbred mice and quantitative trait loci analysis Genomics 27(1) 161-164 May 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7665164&dopt=Abstract 7665164 95394453 03 12-14 wks 84 98 Male 4 pmole/4min/mg protein 80.1 5.7 64.8 5.9 52.4 4.6 62.8 7.0 43.5 4.0 55.5 8.0 112.1 13.9 94.2 14.4 59.4 6.6 54.7 7.2 92.3 23.3 90.4 13.6 112.8 10.0 62.7 2.2 55.2 4.7 107.1 11.3 89.3 7.8 59.5 4.2 107.9 10.2 51.7 3.4 128.9 4.8 76.2 4.7 78.1 4.1 79.2 7.6 51.6 3.2 52.5 4.1 87.2 9.6 6/11/2003 MK Sullivan 7665164.03 Haloperidol induced catalepsy - ED50 [mg/kg] The strain means for haloperidol-induced catalepsy were determined in the 26 strain BXD recombinant inbred series. The ED50 values ranged from 0.55 mg/kg (strain 30) to 7.9 mg/kg (strain 2). Heritability for the catalepsy response was 0.78 and the number of effective loci was estimated to be four. The strain means were correlated with the strain distribution patterns for 1300 marker loci of known chromosomal location and polymorphic between the C57Bl/6J and DBA/2J strains. Six quantitative trait loci (QTLs) were identified at P < .01. Two of the six QTLs were confirmed in a sample of B6XD2 F2 animals (n = 144), phenotyped for haloperidol response and genotyped for microsatellites closely linked to the QTLs. The confirmed QTL on chromosome 4 is near the b locus. The confirmed QTL on chromosome 9 is closely linked to Drd2, the D2 dopamine receptor gene. One hundred of the F2 individuals were phenotyped for D2 dopamine receptor binding using the ligand [125I] epidepride as the ligand. Consistent with previous results, the nonresponsive F2 individuals showed modestly higher receptor binding in all brain regions examined: the nucleus accumbens core, the nucleus accumbens shell, the lateral caudate putamen, the dorsomedial caudate putamen, the substantia nigra zona compacta and the ventral tegmental area. The DBA/2J allele of the chromosome 9 QTL was associated with higher receptor binding in all brain areas except the ventral tegmental area. Overall, the data illustrate that either near or part of Drd2 is a QTL which has significant effects on both haloperidol response and D2 dopamine receptor binding. However, the data also illustrate that most of the genetic variance in either haloperidol response or D2 dopamine receptor binding is not associated with Drd2. Kanes S, Dains K Mapping the genes for haloperidol-induced catalepsy. J Pharmacol Exp Ther 277(2) 1016-1025 May 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627512&dopt=Abstract 8627512 96210104 01 100 days 100 MF mg/kg 3.8 0.4 1.17 7.9 1.23 3.25 1.48 1.73 2.47 2.94 1.53 2.31 1.17 4.18 4.43 2.39 2.8 0.98 0.61 5.89 0.93 3.62 1.35 2.73 6.67 0.55 0.96 3.81 6/6/2002 8627512.01 High Dose Sensitivity to ethanol sleep time female [min] Although the recombinant inbred strain method was designed for molecular genetic analysis of linkage, it also provides powerful quantitative genetic analyses of heritability and genetic correlations. Measures of alcohol acceptance, alcohol preference, and hypnotic dose sensitivity (HDS) were assessed in 21 strains of mice from the BXD RI series. Sex differences were found to be significant at a phenotypic level. However, heritability estimates for acceptance, preference, and HDS are similar in males and females. Heritability estimates for the three measures are approximately 0.20 for acceptance and preference, and 0.10 for HDS. Analyses of genetic correlations reveal that acceptance and preference share some degree of genetic influence, although they mostly operate under different genetically mediated mechanisms. HDS did not show a significant genetic relationship to either acceptance or preference. Strong correlations were obtained when acceptance, preference, and HDS strain means were correlated across male and female recombinant inbreds, suggesting substantial genetic similarity across sexes. Rodriguez LA, Plomin R, Blizard DA, Jones BC, McClearn GE Alcohol acceptance, preference, and sensitivity in mice. I. Quantitative genetic analysis using BXD recombinant inbred strains Alcohol Clin Exp Res 18(6) 1416-1422 Dec 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7695038&dopt=Abstract 7695038 95209059 05 117-137 days 117 137 Female 7-15 min 103.83 116.46 109.89 121.93 17.96 112.66 125.27 97.84 107.41 159.76 91.98 119.62 104.52 100.89 132.81 110.6 115.38 111.68 116.27 119.97 146.8 141.16 7/11/2003 MK Sullivan 7695038.05 High Dose Sensitivity to ethanol sleep time male [min] Although the recombinant inbred strain method was designed for molecular genetic analysis of linkage, it also provides powerful quantitative genetic analyses of heritability and genetic correlations. Measures of alcohol acceptance, alcohol preference, and hypnotic dose sensitivity (HDS) were assessed in 21 strains of mice from the BXD RI series. Sex differences were found to be significant at a phenotypic level. However, heritability estimates for acceptance, preference, and HDS are similar in males and females. Heritability estimates for the three measures are approximately 0.20 for acceptance and preference, and 0.10 for HDS. Analyses of genetic correlations reveal that acceptance and preference share some degree of genetic influence, although they mostly operate under different genetically mediated mechanisms. HDS did not show a significant genetic relationship to either acceptance or preference. Strong correlations were obtained when acceptance, preference, and HDS strain means were correlated across male and female recombinant inbreds, suggesting substantial genetic similarity across sexes. Rodriguez LA, Plomin R, Blizard DA, Jones BC, McClearn GE Alcohol acceptance, preference, and sensitivity in mice. I. Quantitative genetic analysis using BXD recombinant inbred strains Alcohol Clin Exp Res 18(6) 1416-1422 Dec 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7695038&dopt=Abstract 7695038 95209059 06 117-137 days 117 137 Male 7-17 min 118.43 108.61 116.96 142.79 150.8 136.34 126.14 109.79 109.32 157.56 125 105.96 140.48 103.54 153.76 129.67 145.67 128.02 109.74 128.2 141.96 154.62 7/11/2003 MK Sullivan 7695038.06 High Dose Sensitivity to ethanol - Duration (mins) of loss of righting reflex following 4.1 g/kg EtOH i.p. Quantitative trait loci (QTL) mapping of complex phenotypes has emerged as an important feature of the recombinant inbred (RI) strain methodology. In this second study of our series on alcohol-related behaviors in mice, we examine alcohol acceptance, preference, and hypnotic dose sensitivity (HDS) to a standard dose of alcohol measured in BXD RI strains to identify candidate QTL regions responsible for their heritability. We detected highly significant marker associations for acceptance on chromosome 12 (Eif4e), for preference on chromosome 1 (D1Rti2) and chromosome 7 (D7Mit7), and for HDS on chromosome 7 (Mpmv1). These are the strongest QTL associations that we detected, but several other candidate QTL regions are reported. Given the limited number of BXD RI strains available, the large number of markers used herein, and the consequent chance of identifying false marker associations, these RI QTL mapping results must be seen as tentative, but an important first step toward identifying QTL for alcohol-related behaviors. Rodriguez LA,Ê Plomin R,ÊBlizard DA, Jones BC,Ê McClearn GE. Alcohol acceptance, preference, and sensitivity in mice. II. Quantitative trait loci mapping analysis using BXD recombinant inbred strains Alcohol Clin Exp Res 19(2) 367-373 Apr 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7625571&dopt=Abstract 7625571 95351511 03 117-137days 117 137 MF 15-31 min 112.1 112.41 113.21 132.36 139.98 124.5 125.7 103.5 108.37 158.71 110.55 112.39 118.9 102.21 144.6 120.13 127.85 119.85 113 124.08 144.54 148.24 7/11/2003 MK Sullivan ETCONS10(PSU) HDS HDS High Dose Sensitivity EtOH 4.1 g/kg Rodriguez p. 369, Table 1 MRG 120601 from publication 7625571.03 Hemopoietic stem cell cycling day 7 [% CAFC] Normal somatic cells undergo replicative senescence in vitro but the significance of this process in organismic aging remains controversial. We have shown previously that hemopoietic stem cells of common inbred strains of mice vary widely in cycling activity and that this parameter is inversely correlated with strain-dependent mean life span. To assess whether cell cycling and life span are causally related, we searched for quantitative trait loci (QTLs) that contributed to variation of these traits in BXH and BXD recombinant inbred mice. Two QTLs, mapping to exactly the same intervals on chromosomes 7 and 11, were identified that were associated with variation of both cell cycling and life span. The locus on chromosome 11 mapped to the cytokine cluster, a segment that shows synteny with human chromosome 5q, in which deletions are strongly associated with myelodysplastic syndrome. These data indicate that steady-state cell turn-over, here measured in hemopoietic progenitor cells, may have a significant effect on the mean life span of mammals. de Haan G, Van Zant G Genetic analysis of hemopoietic cell cycling in mice suggests its involvement in organismal life span. FASEB J 13(6) 707-713 Apr 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10094931&dopt=Abstract 10094931 99196952 01 6-8 wks 42 56 Female 10-20 % 8 10.4 20 9.8 36 10.6 12.6 11.1 31 9.7 31 7.8 13 10.8 2 7.6 29 7.6 16 8.3 26 6.3 18 8.9 22 9.0 34 8.6 13 6.1 2 11.5 0.8 11.2 32 9.6 6 6.8 12.6 12.0 7.8 12.8 0.8 7.6 12.8 11.1 24 8.7 19 6.1 0.8 9.4 56 3.3 34 8.9 6/9/2003 MK Sullivan 10094931.01 Hindbrain weight [mg] [raw average from strainDB 6/28/00] Williams RW unpub unpublished 2000 81 100 days 100 MF mg 42.5 46.5 42.0 43.4 39.1 44.1 44.7 43.1 34.3 36.2 42.6 41.8 46.3 39.2 30.8 44.4 41.5 38.6 43.6 50.1 12/19/2002 .81 Hippocampus weight [raw average from strainDB 6/28/00] Notable differences in hippocampal structure are associated with intriguing differences in development and behavioral capabilities. We explored genetic and environmental factors that modulate hippocampal size, structure, and cell number using sets of C57BL/6J (B6) and DBA/2J (D2) mice; their F1 and F2 intercrosses (n = 180); and 35 lines of BXD recombinant inbred (RI) strains. Hippocampal weights of the parental strains differ by 20%. Estimates of granule cell number also differ by approximately 20%. Hippocampal weights of RI strains range from 21 to 31 mg, and those of individual F2 mice range from 23 to 36 mg (bilateral weights). Volume and granule cell number are well correlated (r = 0.7-0.8). Significant variation is associated with differences in age and sex. The hippocampus increases in weight by 0.24 mg per month, and those of males are 0.55 mg heavier (bilateral) than those of females. Heritability of variation is approximately 50%, and half of this genetic variation is generated by two quantitative trait loci that map to chromosome 1 (Hipp1a: genome-wide p < 0.005, between 65 and 100 cM) and to chromosome 5 (Hipp5a, p < 0.05, between 15 and 40 cM). These are among the first gene loci known to produce normal variation in forebrain structure. Hipp1a and Hipp5a individually modulate hippocampal weight by 1.0-2.0 mg, an effect size greater than that generated by age or sex. The Hipp gene loci modulate neuron number in the dentate gyrus, collectively shifting the population up or down by as much as 200,000 cells. Candidate genes for the Hipp loci include Rxrg and Fgfr3. Lu L, Airey DC, Williams RW Complex trait analysis of the hippocampus: mapping and biometric analysis of two novel gene loci with specific effects on hippocampal structure in mice. J Neurosci 21(10) 3503-3514 May 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11331379&dopt=Abstract 11331379 01 100 days 100 MF 27.1 25.3 26.8 26.3 26.2 25.4 25.5 26.4 24.7 26.0 27.9 28.3 26.2 28.3 24.3 26.5 25.3 24.3 23.9 24.5 23.3 23.1 22.1 21.1 23.6 25.3 26.3 23.8 26.1 25.7 24.5 27.3 24.7 30.5 27.4 12/20/2002 11331379.01 Induction of serum IL-6 after TNF injection [ng/ml] Administration of recombinant murine tumor necrosis factor (TNF) to mice results in lethal shock, characterized by hypotension, hypothermia, and dramatic induction of cytokines released in the circulation, such as interleukin-6 (IL-6). The sensitivity of mice to the effects of murine TNF varies from strain to strain. DBA/2 mice were found to be considerably more resistant to TNF than C57BL/6 mice. The resistance proved to be dominant since (C57BL/6 x DBA/2)F1 mice were also resistant. Using BXD recombinant inbred mice and a dose of TNF lethal for C57BL/6 but not for DBA/2 mice, we found that the resistance to TNF links to loci coding for corticosteroid-binding globulin (Cbg), alpha1-protease inhibitor (Spi1), contrapsin (Spi2) and the contrapsin-regulating gene Spi2r that form a gene cluster on chromosome 12. Quantitative trait-loci analysis of TNF-induced induction of IL-6 and of hypothermia also points to the importance of this locus (P < 0.0002 and P = 0.017, respectively), more particularly the Cbg and Spi2 loci, in the resistance to TNF. We propose to name the locus "TNF protection locus." The data suggest that endogenous protease inhibitors and/or glucocorticoids play a significant role in the attenuation of TNF-induced lethal shock. This study also demonstrates that loci affecting important biological responses can be identified with very high resolution using recombinant inbred mice. Libert C,ÊWielockx B, Hammond GL,Ê Brouckaert P,ÊFiers W,ÊElliott RW. Identification of a locus on distal mouse chromosome 12 that controls resistance to tumor necrosis factor-induced lethal shock. Genomics 55(3) 284-289 Feb 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10049582&dopt=Abstract 10049582 99168897 02 15 wks 105 Female 2-9 ng/ml 5 0.49 2.45 0.12 4 0.20 5.3 0.42 2.5 0.34 3 0.17 2.9 0.40 2.5 0.19 5.5 0.21 2.95 0.14 2.55 0.40 4.4 0.23 4.25 0.15 4.8 0.28 5 0.40 1.8 0.03 2.5 0.12 2.8 0.10 3 0.50 4.3 0.33 4.9 0.45 1.7 0.07 2.2 0.10 6/9/2003 MK Sullivan 10049582.02 Prepulse Inhibition of the Acoustic Startle Response to 110 dB SPL white-noise bursts, 5 kHz, 80 dB Prepulse Stimulus [%] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 08 100 days 100 MF 9-15 % 50.8 24.4 31.6 34.8 17.5 36.3 40.7 9.9 35.3 -6.7 14.2 12.3 34.1 16 39.5 -14.6 19 11.6 19 31.5 -9.9 14.9 -10.4 12/27/2002 Ryan McNeive Ryan McNeive 10371755.08 Prepulse Inhibition of the Acoustic Startle Response to 110 dB SPL white-noise bursts, 10 kHz,80 dB Prepulse Stimulus [%] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 09 100 days 100 MF 9-15 % 62.9 42.2 46.6 40.2 15.8 45.9 49.3 38 37.8 12.5 17.4 6.2 43.1 16.7 24.8 -2.7 27.4 20.6 39.1 37.5 -1 19.8 4.2 12/27/2002 Ryan McNeive Ryan McNeive 10371755.09 Prepulse Inhibition of the Acoustic Startle Response to 110 dB SPL white-noise bursts, 15 kHz, 80 dB Prepulse Stimulus [%] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 10 100 days 100 MF 9-15 % 46 45.9 40.8 54.7 25.5 27 37.5 33.3 25.6 -1.9 -10.6 6.6 22.4 15.6 59.4 17.1 41 4.5 29.8 46.2 14.8 18.8 -6.6 12/27/2002 Ryan McNeive Ryan McNeive 10371755.1 Prepulse Inhibition of the Acoustic Startle Response to 110 dB SPL white-noise bursts, 20 kHz, 80 dB Prepulse Stimulus [%] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 11 100 days 100 MF 9-15 % 40.6 9.2 31.6 23 15.3 13.6 21.7 25.7 11.8 -9.7 8.8 -7.3 7.1 9.6 31.9 -6.3 0.2 2.7 13.2 32.2 -2.6 13.1 -3.4 12/27/2002 Ryan McNeive Ryan McNeive 10371755.11 Prepulse Inhibition of the Acoustic Startle Response to a 110-db SPL, 10 kHz tone, 56-db SPL white-noise Prepulse Stimulus [%] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 12 100 days 100 MF 9-15 % 26.8 2.1 44 25.9 13.4 60.1 35.7 13.3 35.4 30.4 27.9 13.7 9.8 59.5 8.4 44.7 36.2 15.1 39.1 4.9 25.1 3.4 35.8 15.2 17.8 12/27/2002 Ryan McNeive Ryan McNeive 10371755.12 Prepulse Inhibition of the Acoustic Startle Response to a 110-db SPL, 10 kHz tone, 68-db SPL white-noise Prepulse Stimulus [%] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 13 100 days 100 MF 9-15 % 32.8 15.5 53 30.5 15.2 65.3 31.5 14.2 21.4 35.2 33.8 18.1 12.9 57.9 28.4 40.6 51 24.2 39.8 13 38 18.3 38.6 28.5 25.8 6/6/2002 Ryan McNeive Ryan McNeive 10371755.13 Prepulse Inhibition of the Acoustic Startle Response to a 110-db SPL, 10 kHz tone, 80-db SPL white-noise Prepulse Stimulus [%] The measurement of the acoustic startle response (ASR) and prepulse inhibition (PPI) of the ASR in many inbred strains of mice, including C57BL/6 and DBA/2, may be complicated by age-related high-frequency hearing loss (HFHL) and the associated cochlear pathology. Willott and Erway (1998) have recently reported on the age-related changes of the acoustic brain response in the BXD recombinant inbred (RI) series. Based on these data, the RI series was divided into three groups: juvenile-, intermediate-, and adult-onset HFHL. Each of these groups was tested using paradigms which varied the frequency or intensity of the auditory startle and prepulse stimuli. The results obtained in adolescent mice (6-8 weeks) demonstrate that ASR performance is independent of HFHL; there was no group-dependent decline in the ASR amplitudes for high-frequency stimuli. The expected effect of HFHL on PPI is to increase the salience of the still-audible tones. In response to a white-noise prepulse stimulus, the PPI in the juvenile-onset group (which shows marked HFHL at 6 weeks) was similar to that in the adult-onset group. However, when the prepulse stimulus was a pure tone, the juvenile group showed a decrease in salience across all frequencies tested (5-20 kHz). The data point out the need for carefully constructing auditory tasks in the BXD RI series, to avoid the confounding effects of HFHL. McCaughran J, Bell J, Hitzemann R On the relationships of high-frequency hearing loss and cochlear pathology to the acoustic startle response (ASR) and prepulse inhibition of the ASR in the BXD recombinant inbred series Behav Genet 29(1) 21-30 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10371755&dopt=Abstract 10371755 99300343 14 100 days 100 MF 9-15 % 42.9 22.6 62.4 29.4 30.1 75.1 33.4 35.9 32.8 46.2 37.5 25.6 21.8 58.5 34.4 7.9 48.7 36.4 50.6 21.7 55.6 14.2 37.5 42.3 42.9 6/6/2002 Ryan McNeive Ryan McNeive 10371755.14 Initial sensitivity to ethanol induced ataxia, onset threshold [mg/kg] Rapid tolerance to rotarod ataxia has previously been demonstrated in mice after sequential ethanol injections. Here we tested DBA/2J and C57BL/6J mice for initial ethanol sensitivity; DBA/2J mice were more sensitive (0.40 +/- 0.17 mg/g brain) than C57BL/6J mice (1.44 +/- 0.12 mg/g). We then monitored the development of tolerance by quantifying blood ethanol concentrations at the recovery from ataxia over five sequential injections; tolerance reached a plateau in about 5 hr. DBA/2J mice became very tolerant (final ethanol threshold 3.47 +/- 0.16 mg/ml, an increase of 3.07 mg/ml, or 8.7-fold above base line); B6 became slightly tolerant (final ethanol threshold 2.62 +/- 12 mg/ml, and increase of 1.18, or 1.8-fold above base line). Therefore, by the end of the treatment regimen, the rank order of sensitivity of the two strains had reversed. We then tested 25 recombinant inbred strains from among strains representing a cross between C57BL/6J and DBA/2J inbred strains, followed by a quantitative trait locus analysis with a database of 1522 markers to identify provisional loci. This procedure identified 19 markers on 11 chromosomes for initial sensitivity, 18 markers on 9 chromosomes for tolerance (delta) and 21 markers on 11 chromosomes for tolerance (fold-increase). Of these, 17 markers were in common, which suggests that initial sensitivity and tolerance share substantial genetic codetermination. Major candidate loci will be confirmed by genotyping B6D2F2 offspring that have been tested for initial sensitivity and tolerance. Gallaher EJ, Jones GE Mapping the genes for haloperidol-induced catalepsy. J Pharmacol Exp Ther 277(2) 604-612 May 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627537&dopt=Abstract 8627537 96210104 01 44-135 days 44 135 Male 4-16 mg/kg 1.44 0.4 1.21 1.09 0.8 1.03 0.77 1.16 0.88 0.94 0.71 0.8 0.41 1.22 1.28 0.98 1.07 0.49 0.9 0.72 1.07 0.8 0.69 1.37 1.03 1.15 0.44 12/19/2002 8627537.01 Intensity of Immune complex deposits detected in kidneys immunized with the 16/6Id [0=no immune complexes; 1=1 - 5 immune complex deposits; 2=5 - 20 immune complaex deposits; 3=20 - 50 immune complex depostits; 4=50 immune complex depostis] The DBA/2 and C57BL/6 mouse strains, as well as the BXD RI lines derived from these strains, were used to map the genes controlling experimentally induced systemic lupus erythematosus (SLE). SLE was induced using two immunologic approaches: (1) immunization with the human monoclonal anti-DNA antibody expressing the 16/6Id, to which the DBA/2 strain is susceptible (responder) and the C57BL/6 strain is resistant (nonresponder); and (2) induction of autoimmune GVHD in B6D2F1 hosts by inoculation of parental DBA/2 (induces SLE) or C57BL/6 (does not induce SLE) T cells. By both approaches the BXD RI lines could be divided into distinct DBA/2-like and C57BL/6-like categories. Concordance of SLE induced by both methods was observed for susceptibility and resistance in 13/15 BXD lines (P < 0.005). The results suggest that at least two non-H-2 genes control susceptibility and resistance to experimentally induced SLE, one mapping to chromosome 7 and the other mapping to chromosome 14. Mozes E, Alling D, Miller MW, Payne SM, Zinger H, Via CS, Shearer GM. Genetic analysis of experimentally induced lupus in mice. Clin Immunol Immunopathol 85(1) 28-34 Oct 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9325066&dopt=Abstract 9325066 01 6-8 wks 42 56 MF 5-10 0=no immune complexes; 1=1 - 5 immune complex deposits; 2=5 - 20 immune complaex deposits; 3=20 - 50 immune complex depostits; 4=50 immune complex depostis 0 3 0 3 2 0 2 3 0 0 4 0 0 0 0 1 0 2 6/6/2003 MK Sullivan Nathan Copeland 9325066.01 Lens weight [mg] PURPOSE: Vision is critically dependent on genetic factors that influence the rate and duration of eye growth. The genetic basis of variation in eye size in mice was explored, and genes that modulate eye weight, lens weight, and retinal area were mapped. METHODS: Eyes of approximately 700 mice were weighed. Data were corrected by regression analysis to eliminate effects of sex, age, and body weight. Interval mapping was used to locate quantitative trait loci (QTLs) using recombinant inbred strains and F2 intercrosses between strains C57BL/6J and DBA/2J. RESULTS: Major QTLs were discovered near the centromere of chromosome 5 (Eye1: genomewide P < 0.005) and on proximal chromosome 17 near the mast cell protease 6 gene (Eye2, P < 0.05). Both QTLs have significant effects on eye size, lens weight, and retinal area. The DBA/2J alleles at Eye1 and Eye2 are partially dominant and increase eye weight by as much as 1.0 mg. Analysis of 183 F2 progeny confirmed and refined the chromosomal assignments of both Eye1 and Eye2. CONCLUSIONS: Eye1 and Eye2 are the first loci known to control normal variation in eye size in any mammal. The hepatic growth factor gene (Hgf), a potent mitogen expressed in the retina, pigment epithelium, and choroid, is a strong candidate for Eye1. The human homolog of Eye2 should map to chromosome 6p, 16q13.3, or 19q13, whereas that of Eye1 should map to 7q. Zhou G, Williams RW Eye1 and Eye2: gene loci that modulate eye size, lens weight, and retinal area in the mouse. Invest Ophthalmol Vis Sci 40(5) 817-825 Apr 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10102277&dopt=Abstract 10102277 99200400 04 106 days 106 MF 8-35 mg 5.9 6.7 6.2 6.1 5.7 5.9 5.8 6 6 5.3 5.3 5.7 5.7 6.1 5.2 6.5 5.5 4.8 6 5.5 5.3 5.3 5.6 5 5.9 5.5 6 6.2 6/12/2003 MK Sullivan 10102277.04 Lethality due to TNF injection [%] Administration of recombinant murine tumor necrosis factor (TNF) to mice results in lethal shock, characterized by hypotension, hypothermia, and dramatic induction of cytokines released in the circulation, such as interleukin-6 (IL-6). The sensitivity of mice to the effects of murine TNF varies from strain to strain. DBA/2 mice were found to be considerably more resistant to TNF than C57BL/6 mice. The resistance proved to be dominant since (C57BL/6 x DBA/2)F1 mice were also resistant. Using BXD recombinant inbred mice and a dose of TNF lethal for C57BL/6 but not for DBA/2 mice, we found that the resistance to TNF links to loci coding for corticosteroid-binding globulin (Cbg), alpha1-protease inhibitor (Spi1), contrapsin (Spi2) and the contrapsin-regulating gene Spi2r that form a gene cluster on chromosome 12. Quantitative trait-loci analysis of TNF-induced induction of IL-6 and of hypothermia also points to the importance of this locus (P < 0.0002 and P = 0.017, respectively), more particularly the Cbg and Spi2 loci, in the resistance to TNF. We propose to name the locus "TNF protection locus." The data suggest that endogenous protease inhibitors and/or glucocorticoids play a significant role in the attenuation of TNF-induced lethal shock. This study also demonstrates that loci affecting important biological responses can be identified with very high resolution using recombinant inbred mice. Libert C,ÊWielockx B, Hammond GL,Ê Brouckaert P,ÊFiers W,ÊElliott RW. Identification of a locus on distal mouse chromosome 12 that controls resistance to tumor necrosis factor-induced lethal shock. Genomics 55(3) 284-289 Feb 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10049582&dopt=Abstract 10049582 99168897 03 15 wks 105 Female 2-9 % 100 0 79 100 66 0 0 12 0 0 89 0 20 56 75 100 100 89 100 10 0 10 20 100 83 10 6/9/2003 MK Sullivan 10049582.03 Locomotor activity, 1 - 5 min habituation after single saline i.p. injection (experimental group) [activity/min] table 1 col 1 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 12 56-125 days 56 125 Male 13-34 activity counts/min 116.2 5.5 65.1 5.8 116.0 5.7 83.7 6.1 54.9 6.0 106.7 7.8 47.4 2.1 76.6 5.6 50.4 4.1 91.5 6.3 60 3.1 97.6 8.6 53 2.4 48.3 1.9 87.1 4.1 52.1 1.9 48.4 3.7 47.3 2.5 85.8 6.6 49.9 7.1 44.5 3.4 146.4 6.8 6/23/2003 MK Sullivan 7480533.12 Locomotor activity, 1 - 5 min after saline (experimental group trial 1) [activity counts per min] table 1 col 2 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 13 56-125 days 56 125 Male 13-34 activity counts/min 87.8 4.8 63.7 3.3 92.4 3.6 73.5 6.0 40.4 1.7 82.3 3.9 48.1 2.6 73.6 4.4 45.7 2.6 66 4.7 46.3 2.7 66.6 4.0 45.9 1.9 45.7 1.4 83.5 4.0 53.6 1.6 47 2.0 38.8 2.7 8.7 3.9 60.1 5.6 51.9 3.8 143.6 4.5 6/23/2003 MK Sullivan Saline: Trial 1 7480533.13 Locomotor activity, 1 - 5 min after saline i.p., trial 4 (experimental group, prior Ethanol exposure) [activity counts per min] table 1 col 3 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 04 56-125 days 56 125 Male 13-34 activity counts/min 39.9 1.9 53.5 4.6 54.6 3.6 36.9 3.9 27.3 1.6 40.4 2.9 29.7 2.6 52.8 3.4 24.1 1.9 33.8 3.5 23.8 2.0 42.7 2.8 37.6 2.0 28.2 1.4 68.8 4.0 47.6 2.4 35.7 2.6 32.4 2.9 49.8 3.1 34 4.4 37.8 4.5 124.7 6.1 6/23/2003 MK Sullivan Saline: Trial 4 7480533.04 Locomotor activity, 1 - 5 min after 2 g/kg ethanol i.p. conditioning trial 1 [activity counts per min] table 1 col 4 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 05 56-125 days 56 125 Male 13-34 2 g/kg IP, activity counts/min 116.7 8.0 138.9 8.8 134.6 9.3 93.7 4.3 76.8 2.6 97.8 4.6 134 7.1 122.6 4.4 98.1 7.2 68.1 5.2 89.4 5.9 124.6 7.5 64.1 3.8 60.7 3.4 128.0 6.3 104.2 6.0 80.0 4.9 67.0 4.6 150.7 9.7 98.6 11.3 75.3 4.5 175 6.7 6/23/2003 MK Sullivan 7480533.05 Locomotor activity, 1 -5 min after 2 g/kg ethanol IP conditioning trial 4 (experimental group prior ethanol exposure) [activity counts per min] table 1 col 5 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 15 56-125 days 56 125 Male 13-34 2 g/kg IP, activity counts/min 57.6 4.1 165.8 7.2 90.4 9.8 67.6 4.9 54.4 4.0 50.4 3.7 123.7 10.5 138.5 7.8 61.0 6.0 45.1 4.9 70.1 7.3 94.5 7.9 49.0 3.5 31.7 2.7 126.0 7.3 114.3 8.7 77.3 4.3 74.3 5.8 115.8 10.1 133.4 12.3 59.3 5.7 170.8 9.1 6/23/2003 MK Sullivan 7480533.15 Locomotor activity, 1 - 5 min after single saline i.p. injection (control group) [activity/min] table 2 col 1 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 07 56-125 days 56 125 Male 6-16 activity/min 132.9 7.5 66.0 7.2 101.1 7.0 77.5 10.8 57 7.1 117.9 9.0 52.1 3.6 85.7 10.7 50.2 6.0 87 7.5 68.1 8.6 80.6 10.7 47.4 4.3 44.8 4.0 93.1 7.5 56.3 4.0 46.1 6.9 46.9 2.7 81.8 10.3 54.3 7.5 49 3.5 141.7 9.7 6/23/2003 MK Sullivan 7480533.07 Locomotor activity, 1 - 5 min after saline i.p., trial 1 (control group) [activity/min] table 2 col 2 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 08 56-125 days 56 125 Male 6-16 activity/min 75.9 5.7 48.0 4.6 74.4 4.8 58.5 6.0 35.2 2.1 81.0 6.4 50.6 2.9 67.5 4.6 37.2 3.8 60.4 6.0 37.1 2.6 52.2 4.2 44.5 3.2 37.8 2.2 75.9 3.9 57.2 2.0 45.0 3.5 35.4 2.1 62.8 4.2 58.3 9.4 41.2 3.5 135.0 6.8 6/23/2003 MK Sullivan Saline: Trial 1 7480533.08 Locomotor activity, 1 - 5 min after saline i.p., trial 4 (control group) [activity/min] table 2 col 3 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 09 56-125 days 56 125 Male 6-16 activity/min 37.8 3.4 39.3 5.0 41.9 3.4 26.4 3.2 22.9 2.2 38.7 4.9 28.6 3.4 41.2 3.6 14.9 2.2 35.9 4.5 15.4 2.0 33.9 3.7 33.6 2.5 25.5 1.8 58.2 4.1 41.6 2.4 30.2 4.2 20.5 3.8 36.8 3.3 22.1 3.4 30.2 4.1 97.5 8.2 6/23/2003 MK Sullivan Saline: Trial 4 7480533.09 Maximal threshold to ethanol induced ataxia [mg/ml] Rapid tolerance to rotarod ataxia has previously been demonstrated in mice after sequential ethanol injections. Here we tested DBA/2J and C57BL/6J mice for initial ethanol sensitivity; DBA/2J mice were more sensitive (0.40 +/- 0.17 mg/g brain) than C57BL/6J mice (1.44 +/- 0.12 mg/g). We then monitored the development of tolerance by quantifying blood ethanol concentrations at the recovery from ataxia over five sequential injections; tolerance reached a plateau in about 5 hr. DBA/2J mice became very tolerant (final ethanol threshold 3.47 +/- 0.16 mg/ml, an increase of 3.07 mg/ml, or 8.7-fold above base line); B6 became slightly tolerant (final ethanol threshold 2.62 +/- 12 mg/ml, and increase of 1.18, or 1.8-fold above base line). Therefore, by the end of the treatment regimen, the rank order of sensitivity of the two strains had reversed. We then tested 25 recombinant inbred strains from among strains representing a cross between C57BL/6J and DBA/2J inbred strains, followed by a quantitative trait locus analysis with a database of 1522 markers to identify provisional loci. This procedure identified 19 markers on 11 chromosomes for initial sensitivity, 18 markers on 9 chromosomes for tolerance (delta) and 21 markers on 11 chromosomes for tolerance (fold-increase). Of these, 17 markers were in common, which suggests that initial sensitivity and tolerance share substantial genetic codetermination. Major candidate loci will be confirmed by genotyping B6D2F2 offspring that have been tested for initial sensitivity and tolerance. Gallaher EJ, Jones GE Mapping the genes for haloperidol-induced catalepsy. J Pharmacol Exp Ther 277(2) 604-612 May 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627537&dopt=Abstract 8627537 96210104 02 44-135 days 44 135 Male 5-12 mg/ml 2.62 3.47 3.75 2.94 2.75 2.21 3.13 3.63 3.24 2.63 3.27 2.65 2.66 2.88 2.86 2.81 2.93 3.28 3.12 3.26 3.17 2.67 3.21 2.91 3.52 2.57 3.49 12/19/2002 8627537.02 Mean life span [longevity in days] Normal somatic cells undergo replicative senescence in vitro but the significance of this process in organismic aging remains controversial. We have shown previously that hemopoietic stem cells of common inbred strains of mice vary widely in cycling activity and that this parameter is inversely correlated with strain-dependent mean life span. To assess whether cell cycling and life span are causally related, we searched for quantitative trait loci (QTLs) that contributed to variation of these traits in BXH and BXD recombinant inbred mice. Two QTLs, mapping to exactly the same intervals on chromosomes 7 and 11, were identified that were associated with variation of both cell cycling and life span. The locus on chromosome 11 mapped to the cytokine cluster, a segment that shows synteny with human chromosome 5q, in which deletions are strongly associated with myelodysplastic syndrome. These data indicate that steady-state cell turn-over, here measured in hemopoietic progenitor cells, may have a significant effect on the mean life span of mammals. de Haan G, Van Zant G Genetic analysis of hemopoietic cell cycling in mice suggests its involvement in organismal life span. FASEB J 13(6) 707-713 Apr 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10094931&dopt=Abstract 10094931 99196952 02 6-8 wks 42 56 Female 10-20 days 675 175 600 400 525 690 660 825 750 740 500 800 650 740 900 740 760 840 715 760 700 740 580 200 6/9/2003 MK Sullivan 10094931.02 Medulla weight [mg] [mean value calculated 6/29/00] Williams RW unpub unpublished 2000 80 100 days 100 MF mg 5.5 8.2 8.6 6.8 5.7 7.3 6.3 6.3 5.9 5.7 6.4 6.4 7.2 7.0 12/19/2002 .8 Mossy fiber MF Mice of the BALB/c strain are widely used in behavioral research in spite of the albino condition, which can obscure brain-behavior relationships. We have developed a pigmented BALB strain, congenic to BALB/c, which could be more appropriate for neurogenetic studies that aim at identifying the effects of neurological mutations on behavior. Comparison of inbred albino and pigmented congenic BALB arising from the same litters provides a valuable tool for detecting the consequences of the albino mutation on behavioral performances. Preliminary results presented here show that the albino condition does not interfere with the development and patterns of connectivity of mossy fibers in the hippocampus. On the other hand, obvious coat color-linked differences appear for locomotor activity and defecation scores in the open field, pigmented mice being unexpectedly less active and more reactive than albino, as if better vision increased their reactions to a novel, anxiogenic environment. Finally, pigmented mice do not show better performances in the radial maze, which confirms that the inability of BALB mice for spatial learning in a highly demanding version of this task cannot be attributed to their inability to process visual information. Lassalle JM,ÊHalley H,ÊRoullet P. Analysis of behavioral and hippocampal variation in congenic albino and pigmented BALB mice. Behav Genet 24(2) 161-169 Mar 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8024533&dopt=Abstract 8024533 94296355 01 100 days 100 MF 201035 170534 235457 183237 176552 204155 241324 183084 167761 168565 182073 208777 181884 166098 166098 195597 183097 195597 167891 169252 159822 169252 159888 195822 183649 172789 206713 159736 6/6/2002 8024533.01 Mossy fiber CA4MF Mice of the BALB/c strain are widely used in behavioral research in spite of the albino condition, which can obscure brain-behavior relationships. We have developed a pigmented BALB strain, congenic to BALB/c, which could be more appropriate for neurogenetic studies that aim at identifying the effects of neurological mutations on behavior. Comparison of inbred albino and pigmented congenic BALB arising from the same litters provides a valuable tool for detecting the consequences of the albino mutation on behavioral performances. Preliminary results presented here show that the albino condition does not interfere with the development and patterns of connectivity of mossy fibers in the hippocampus. On the other hand, obvious coat color-linked differences appear for locomotor activity and defecation scores in the open field, pigmented mice being unexpectedly less active and more reactive than albino, as if better vision increased their reactions to a novel, anxiogenic environment. Finally, pigmented mice do not show better performances in the radial maze, which confirms that the inability of BALB mice for spatial learning in a highly demanding version of this task cannot be attributed to their inability to process visual information. Lassalle JM,ÊHalley H,ÊRoullet P. Analysis of behavioral and hippocampal variation in congenic albino and pigmented BALB mice. Behav Genet 24(2) 161-169 Mar 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8024533&dopt=Abstract 8024533 94296355 02 100 days 100 MF 95604 73495 108113 79558 69461 98145 102257 82676 76052 71343 80200 85196 91529 84975 72329 78205 80195 82715 77941 79350 69893 72158 67393 86697 81027 73771 89044 70752 6/6/2002 8024533.02 Mossy fiber SPMF Mice of the BALB/c strain are widely used in behavioral research in spite of the albino condition, which can obscure brain-behavior relationships. We have developed a pigmented BALB strain, congenic to BALB/c, which could be more appropriate for neurogenetic studies that aim at identifying the effects of neurological mutations on behavior. Comparison of inbred albino and pigmented congenic BALB arising from the same litters provides a valuable tool for detecting the consequences of the albino mutation on behavioral performances. Preliminary results presented here show that the albino condition does not interfere with the development and patterns of connectivity of mossy fibers in the hippocampus. On the other hand, obvious coat color-linked differences appear for locomotor activity and defecation scores in the open field, pigmented mice being unexpectedly less active and more reactive than albino, as if better vision increased their reactions to a novel, anxiogenic environment. Finally, pigmented mice do not show better performances in the radial maze, which confirms that the inability of BALB mice for spatial learning in a highly demanding version of this task cannot be attributed to their inability to process visual information. Lassalle JM,ÊHalley H,ÊRoullet P. Analysis of behavioral and hippocampal variation in congenic albino and pigmented BALB mice. Behav Genet 24(2) 161-169 Mar 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8024533&dopt=Abstract 8024533 94296355 03 100 days 100 MF 78388 93765 101833 83695 82143 92057 105625 84840 76814 75664 84697 98555 118355 77463 72642 93293 77409 92860 90151 79737 77537 75635 74170 85185 83292 83211 98742 74437 6/6/2002 8024533.03 Mossy fiber IIPMF Mice of the BALB/c strain are widely used in behavioral research in spite of the albino condition, which can obscure brain-behavior relationships. We have developed a pigmented BALB strain, congenic to BALB/c, which could be more appropriate for neurogenetic studies that aim at identifying the effects of neurological mutations on behavior. Comparison of inbred albino and pigmented congenic BALB arising from the same litters provides a valuable tool for detecting the consequences of the albino mutation on behavioral performances. Preliminary results presented here show that the albino condition does not interfere with the development and patterns of connectivity of mossy fibers in the hippocampus. On the other hand, obvious coat color-linked differences appear for locomotor activity and defecation scores in the open field, pigmented mice being unexpectedly less active and more reactive than albino, as if better vision increased their reactions to a novel, anxiogenic environment. Finally, pigmented mice do not show better performances in the radial maze, which confirms that the inability of BALB mice for spatial learning in a highly demanding version of this task cannot be attributed to their inability to process visual information. Lassalle JM,ÊHalley H,ÊRoullet P. Analysis of behavioral and hippocampal variation in congenic albino and pigmented BALB mice. Behav Genet 24(2) 161-169 Mar 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8024533&dopt=Abstract 8024533 94296355 04 100 days 100 MF 27042 12275 25512 19984 24948 13953 33443 15568 14895 21558 17176 25025 14859 19446 21127 12645 7688 20021 15005 26597 20462 21460 18326 24939 19329 15807 18926 14546 6/6/2002 8024533.04 Mossy fiber CA4/MF % Mice of the BALB/c strain are widely used in behavioral research in spite of the albino condition, which can obscure brain-behavior relationships. We have developed a pigmented BALB strain, congenic to BALB/c, which could be more appropriate for neurogenetic studies that aim at identifying the effects of neurological mutations on behavior. Comparison of inbred albino and pigmented congenic BALB arising from the same litters provides a valuable tool for detecting the consequences of the albino mutation on behavioral performances. Preliminary results presented here show that the albino condition does not interfere with the development and patterns of connectivity of mossy fibers in the hippocampus. On the other hand, obvious coat color-linked differences appear for locomotor activity and defecation scores in the open field, pigmented mice being unexpectedly less active and more reactive than albino, as if better vision increased their reactions to a novel, anxiogenic environment. Finally, pigmented mice do not show better performances in the radial maze, which confirms that the inability of BALB mice for spatial learning in a highly demanding version of this task cannot be attributed to their inability to process visual information. Lassalle JM,ÊHalley H,ÊRoullet P. Analysis of behavioral and hippocampal variation in congenic albino and pigmented BALB mice. Behav Genet 24(2) 161-169 Mar 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8024533&dopt=Abstract 8024533 94296355 05 100 days 100 MF 47.56 40.88 45.42 43.33 39.48 48.17 42.3 45.26 45.36 42.32 44.08 40.6 40.6 46.77 43.53 42.64 48.55 42.21 42.57 42.66 41.82 42.65 42.2 43.74 44.11 42.72 42.64 44.29 6/6/2002 8024533.05 Mossy fiber SP/MF % Mice of the BALB/c strain are widely used in behavioral research in spite of the albino condition, which can obscure brain-behavior relationships. We have developed a pigmented BALB strain, congenic to BALB/c, which could be more appropriate for neurogenetic studies that aim at identifying the effects of neurological mutations on behavior. Comparison of inbred albino and pigmented congenic BALB arising from the same litters provides a valuable tool for detecting the consequences of the albino mutation on behavioral performances. Preliminary results presented here show that the albino condition does not interfere with the development and patterns of connectivity of mossy fibers in the hippocampus. On the other hand, obvious coat color-linked differences appear for locomotor activity and defecation scores in the open field, pigmented mice being unexpectedly less active and more reactive than albino, as if better vision increased their reactions to a novel, anxiogenic environment. Finally, pigmented mice do not show better performances in the radial maze, which confirms that the inability of BALB mice for spatial learning in a highly demanding version of this task cannot be attributed to their inability to process visual information. Lassalle JM,ÊHalley H,ÊRoullet P. Analysis of behavioral and hippocampal variation in congenic albino and pigmented BALB mice. Behav Genet 24(2) 161-169 Mar 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8024533&dopt=Abstract 8024533 94296355 06 100 days 100 MF 39.03 52.37 43.77 45.94 46.47 45.06 43.77 46.39 45.85 44.97 46.61 47.62 52.8 42.62 43.77 50.57 46.88 47.69 49.27 43.05 46.2 44.73 46.5 43.68 45.41 48.17 48.16 46.67 6/6/2002 8024533.06 Mossy fiber IIP/MF % Mice of the BALB/c strain are widely used in behavioral research in spite of the albino condition, which can obscure brain-behavior relationships. We have developed a pigmented BALB strain, congenic to BALB/c, which could be more appropriate for neurogenetic studies that aim at identifying the effects of neurological mutations on behavior. Comparison of inbred albino and pigmented congenic BALB arising from the same litters provides a valuable tool for detecting the consequences of the albino mutation on behavioral performances. Preliminary results presented here show that the albino condition does not interfere with the development and patterns of connectivity of mossy fibers in the hippocampus. On the other hand, obvious coat color-linked differences appear for locomotor activity and defecation scores in the open field, pigmented mice being unexpectedly less active and more reactive than albino, as if better vision increased their reactions to a novel, anxiogenic environment. Finally, pigmented mice do not show better performances in the radial maze, which confirms that the inability of BALB mice for spatial learning in a highly demanding version of this task cannot be attributed to their inability to process visual information. Lassalle JM,ÊHalley H,ÊRoullet P. Analysis of behavioral and hippocampal variation in congenic albino and pigmented BALB mice. Behav Genet 24(2) 161-169 Mar 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8024533&dopt=Abstract 8024533 94296355 07 100 days 100 MF 13.41 6.76 10.81 10.73 14.05 6.77 13.93 8.34 8.79 12.71 9.31 11.78 6.6 10.61 12.7 6.78 4.57 10.1 8.16 14.29 11.97 12.62 11.31 12.58 10.48 9.11 9 9.04 6/6/2002 8024533.07 Lavageable bronchoalveolar polymorphonuclear leukocytes (PMNs) 6h after acute (3h) exposure to 2ppm ozone, number of PMNs [BAL (x10^3)] We demonstrated previously that inbred strains of mice are differentially susceptible to acute (3 h) and subacute (48 h) exposures to 2 parts per million (ppm) ozone (O3) and 0.30 ppm O3, respectively. Genetic studies with O3-resistant C3H/HeJ and O3-susceptible C57BL/6J strains have indicated that susceptibility to each of these O3 exposures is under Mendelian (single gene) control. In the present study, we hypothesized that the same gene controls susceptibility to the airway inflammatory responses to 2 ppm and 0.30 ppm O3 exposures. To test this hypothesis, airway inflammation was induced in 10 BXH and 16 BXD recombinant inbred (RI) strains of mice by acute as well as subacute O3 exposures. Airway inflammation was assessed by counting the number of polymorphonuclear leukocytes (PMNs) in bronchoalveolar lavage (BAL) returns obtained immediately after 48-h subacute exposure to 0.30 ppm O3, or 6 h after 3 h acute exposure to 2 ppm O3. Each RI strain was classified as susceptible or resistant to each exposure, based on a comparison of mean numbers of PMNs with those of the respective progenitor strains. For each RI set, a phenotypic strain distribution pattern (SDP) was thus derived for each exposure regimen, and the SDPs were then compared for concordance. Among the BXH RI strains, 4 of 10 responded discordantly to the two exposures: 3 were susceptible to acute exposure and resistant to subacute exposure, whereas 1 was conversely susceptible. Among the BXD RI strains, 4 of 16 were discordant: 1 was susceptible to acute exposure, and resistant to subacute exposure, whereas 3 were conversely susceptible.(ABSTRACT TRUNCATED AT 250 WORDS) Kleeberger SR, Levitt RC, Zhang LY. Susceptibility to ozone-induced inflammation. II. Separate loci control responses to acute and subacute exposures Am J Physiol 264(1Pt 1) L21-L26 Jan 1993 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8430813&dopt=Abstract 8430813 01 6-8 wks 42 56 MF 4-38 number of PMNs in BAL (x103) 10 1.4 2 1.3 2 1.3 4 1.8 2 1.4 1 1.3 13 1.9 2 1.4 1 1.4 15 5.1 3 1.6 2 1.6 23 6.5 1 1.5 1 1.3 2 1.2 1 1.3 1 1.6 6/25/2003 MK Sullivan 8430813.01 Lavageable bronchoalveolar polymorphonuclear leukocytes (PMNs) 6h after subacute (48h) exposure to 0.30 ppm ozone, number of PMNs [BAL (x10^3)] We demonstrated previously that inbred strains of mice are differentially susceptible to acute (3 h) and subacute (48 h) exposures to 2 parts per million (ppm) ozone (O3) and 0.30 ppm O3, respectively. Genetic studies with O3-resistant C3H/HeJ and O3-susceptible C57BL/6J strains have indicated that susceptibility to each of these O3 exposures is under Mendelian (single gene) control. In the present study, we hypothesized that the same gene controls susceptibility to the airway inflammatory responses to 2 ppm and 0.30 ppm O3 exposures. To test this hypothesis, airway inflammation was induced in 10 BXH and 16 BXD recombinant inbred (RI) strains of mice by acute as well as subacute O3 exposures. Airway inflammation was assessed by counting the number of polymorphonuclear leukocytes (PMNs) in bronchoalveolar lavage (BAL) returns obtained immediately after 48-h subacute exposure to 0.30 ppm O3, or 6 h after 3 h acute exposure to 2 ppm O3. Each RI strain was classified as susceptible or resistant to each exposure, based on a comparison of mean numbers of PMNs with those of the respective progenitor strains. For each RI set, a phenotypic strain distribution pattern (SDP) was thus derived for each exposure regimen, and the SDPs were then compared for concordance. Among the BXH RI strains, 4 of 10 responded discordantly to the two exposures: 3 were susceptible to acute exposure and resistant to subacute exposure, whereas 1 was conversely susceptible. Among the BXD RI strains, 4 of 16 were discordant: 1 was susceptible to acute exposure, and resistant to subacute exposure, whereas 3 were conversely susceptible.(ABSTRACT TRUNCATED AT 250 WORDS) Kleeberger SR, Levitt RC, Zhang LY. Susceptibility to ozone-induced inflammation. II. Separate loci control responses to acute and subacute exposures Am J Physiol 264(1Pt 1) L21-L26 Jan 1993 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8430813&dopt=Abstract 8430813 02 6-8 wks 42 56 MF 2-16 number of PMNs in BAL (x103) 10 2.1 2 1.3 14 3.5 16 4.5 14 4.9 1 1.3 23 6.9 1 1.3 4 1.3 2 1.3 2 1.5 2 1.3 14 2.0 1 1.4 2 1.4 2 1.4 1 1.3 1 1.3 6/25/2003 MK Sullivan 8430813.02 T cell receptor expression, V-gamma-1 positive, V-gamma-4 positive, % of total gamma-delta intestinal intraepithelial lymphocytes [%] Most of the gd T cells in the intestinal epithelium of normal mice use the Vg1 or the Vg7 gene segments. However, the relative proportions of gd intraepithelial lymphocytes expressing either the Vg1 or the Vg7 chain vary among different strains of mice whereas they are quite constant between different individuals of the same strain, suggesting that genetic factors, rather than environmental factors, are responsible for the observed differences. To analyze the genetic factors influencing the representation of different gd T cell subsets in the intestinal epithelium, we used available anti-T cell antigen receptor (TCR) V region-specific mAbs against Vg1, Vg4, Vg7, and Vd4 to examine the TCR repertoire of intraepithelial gd lymphocytes in a set of (C57BL/6Ê´ÊDBA/2) recombinant inbred strains. Our results show that the representation of different Vg and Vd gene products among gd intestinal intraepithelial lymphocytes is under a complex genetic control with a marked influence by genes closely linked to the TCRg, TCRd, and major histocompatibility complex loci. Pereira P, Lafaille JJ, Gerber D, and Tonegawa S The T cell receptor repertoire of intestinal intraepithelial gammadelta T lymphocytes is influenced by genes linked to the major histocompatibility Proc Natl Acad Sci USA 94(11) 5761-5766 May 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9159147&dopt=Abstract 9159147 01 2-6 months 60 180 MF 2 % 14.75 1.5 3.25 4.75 4.25 6.25 2.25 10.75 8.75 7.5 2.25 2.75 8.75 1.5 2.75 3.75 10.75 3.25 19.25 1.5 2.25 8.75 9.0 4.25 4.25 12/19/2002 Nathan Copeland 9159147.01 T cell receptor expression, V-gamma-7 positive and V-gamma-4] positive % of total gamma-delta intestinal intraepithelial lymphocytes [%] Most of the gd T cells in the intestinal epithelium of normal mice use the Vg1 or the Vg7 gene segments. However, the relative proportions of gd intraepithelial lymphocytes expressing either the Vg1 or the Vg7 chain vary among different strains of mice whereas they are quite constant between different individuals of the same strain, suggesting that genetic factors, rather than environmental factors, are responsible for the observed differences. To analyze the genetic factors influencing the representation of different gd T cell subsets in the intestinal epithelium, we used available anti-T cell antigen receptor (TCR) V region-specific mAbs against Vg1, Vg4, Vg7, and Vd4 to examine the TCR repertoire of intraepithelial gd lymphocytes in a set of (C57BL/6Ê´ÊDBA/2) recombinant inbred strains. Our results show that the representation of different Vg and Vd gene products among gd intestinal intraepithelial lymphocytes is under a complex genetic control with a marked influence by genes closely linked to the TCRg, TCRd, and major histocompatibility complex loci. Pereira P, Lafaille JJ, Gerber D, and Tonegawa S The T cell receptor repertoire of intestinal intraepithelial gammadelta T lymphocytes is influenced by genes linked to the major histocompatibility Proc Natl Acad Sci USA 94(11) 5761-5766 May 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9159147&dopt=Abstract 9159147 02 2-6 months 60 180 MF 2 % 26.5 6.0 13.0 5.0 7.5 9.0 9.0 8.5 13.0 3.5 8.5 9.5 7.5 9.0 12.0 22.5 20.5 19.5 15.0 16.5 30.5 6.0 21.5 7.5 8.5 12/19/2002 Nathan Copeland 9159147.02 T cell receptor expression, V-gamma-7 positive, Vgamma-4 negative, % of total gamma-delta intestinal intraepithelial lymphocytes [%] Most of the gd T cells in the intestinal epithelium of normal mice use the Vg1 or the Vg7 gene segments. However, the relative proportions of gd intraepithelial lymphocytes expressing either the Vg1 or the Vg7 chain vary among different strains of mice whereas they are quite constant between different individuals of the same strain, suggesting that genetic factors, rather than environmental factors, are responsible for the observed differences. To analyze the genetic factors influencing the representation of different gd T cell subsets in the intestinal epithelium, we used available anti-T cell antigen receptor (TCR) V region-specific mAbs against Vg1, Vg4, Vg7, and Vd4 to examine the TCR repertoire of intraepithelial gd lymphocytes in a set of (C57BL/6Ê´ÊDBA/2) recombinant inbred strains. Our results show that the representation of different Vg and Vd gene products among gd intestinal intraepithelial lymphocytes is under a complex genetic control with a marked influence by genes closely linked to the TCRg, TCRd, and major histocompatibility complex loci. Pereira P, Lafaille JJ, Gerber D, and Tonegawa S The T cell receptor repertoire of intestinal intraepithelial gammadelta T lymphocytes is influenced by genes linked to the major histocompatibility Proc Natl Acad Sci USA 94(11) 5761-5766 May 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9159147&dopt=Abstract 9159147 03 2-6 months 60 180 MF 2 % 24.0 49.5 21.0 17.5 57.0 27.5 36.5 27.5 43.0 38.0 52.5 34.0 26.0 58.5 22.0 26.0 41.0 34.0 24.0 29.5 31.5 43.0 27.5 31.5 22.5 12/19/2002 Nathan Copeland 9159147.03 T cell receptor expression, V-gamma-1 positive, V-gamma-4 negative, % of total gamma-delta intestinal intraepithelial lymphocytes [%] Most of the gd T cells in the intestinal epithelium of normal mice use the Vg1 or the Vg7 gene segments. However, the relative proportions of gd intraepithelial lymphocytes expressing either the Vg1 or the Vg7 chain vary among different strains of mice whereas they are quite constant between different individuals of the same strain, suggesting that genetic factors, rather than environmental factors, are responsible for the observed differences. To analyze the genetic factors influencing the representation of different gd T cell subsets in the intestinal epithelium, we used available anti-T cell antigen receptor (TCR) V region-specific mAbs against Vg1, Vg4, Vg7, and Vd4 to examine the TCR repertoire of intraepithelial gd lymphocytes in a set of (C57BL/6Ê´ÊDBA/2) recombinant inbred strains. Our results show that the representation of different Vg and Vd gene products among gd intestinal intraepithelial lymphocytes is under a complex genetic control with a marked influence by genes closely linked to the TCRg, TCRd, and major histocompatibility complex loci. Pereira P, Lafaille JJ, Gerber D, and Tonegawa S The T cell receptor repertoire of intestinal intraepithelial gammadelta T lymphocytes is influenced by genes linked to the major histocompatibility Proc Natl Acad Sci USA 94(11) 5761-5766 May 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9159147&dopt=Abstract 9159147 04 2-6 months 60 180 MF 2 % 36.5 34.5 55.5 67.5 39.0 55.5 49.0 49.0 31.0 41.5 33.5 61.5 51.0 33.5 57.5 41.5 35.5 34.0 35.5 44.0 40.0 32.0 36.5 51.0 54.5 12/19/2002 Nathan Copeland 9159147.04 T cell receptor expression, V-gamma-7 positive, gamma-4 negative cells, % of total gamma-delta intestinal intraepithelial lymphocytes [%] Most of the gd T cells in the intestinal epithelium of normal mice use the Vg1 or the Vg7 gene segments. However, the relative proportions of gd intraepithelial lymphocytes expressing either the Vg1 or the Vg7 chain vary among different strains of mice whereas they are quite constant between different individuals of the same strain, suggesting that genetic factors, rather than environmental factors, are responsible for the observed differences. To analyze the genetic factors influencing the representation of different gd T cell subsets in the intestinal epithelium, we used available anti-T cell antigen receptor (TCR) V region-specific mAbs against Vg1, Vg4, Vg7, and Vd4 to examine the TCR repertoire of intraepithelial gd lymphocytes in a set of (C57BL/6Ê´ÊDBA/2) recombinant inbred strains. Our results show that the representation of different Vg and Vd gene products among gd intestinal intraepithelial lymphocytes is under a complex genetic control with a marked influence by genes closely linked to the TCRg, TCRd, and major histocompatibility complex loci. Pereira P, Lafaille JJ, Gerber D, and Tonegawa S The T cell receptor repertoire of intestinal intraepithelial gammadelta T lymphocytes is influenced by genes linked to the major histocompatibility Proc Natl Acad Sci USA 94(11) 5761-5766 May 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9159147&dopt=Abstract 9159147 05 2-6 months 60 180 MF 2 % 27.0 49.5 21.5 17.5 27.0 36.5 27.0 43.0 38.0 34.5 25.5 23.0 26.0 41.0 34.0 24.0 30.0 30.5 45.5 23.5 31.5 22.5 12/19/2002 Nathan Copeland 9159147.05 Olfactory bulb weight, mg [raw average from strainDB 6/28/00] Olfaction is influenced by a complex mix of environmental and genetic factors that modulate the production, migration, and maturation of cells in the olfactory bulbs. In this study we analyzed effects of sex, age, body weight, and brain weight on olfactory bulb size in sexually mature mice. We then used regression corrected values (residuals) to map quantitative trait loci (QTLs) that selectively modulate bulb weight. This biometric analysis has relied on an F2 intercross between C57BL/6J (B6) and DBA/2J (D2) inbred strains and a large sample of 35 BXD recombinant inbred (RI) strains. Bilateral bulb weight in adult mice ranges from 10 to 30 mg. Half of this remarkable variation can be predicted from differences in brain weight, sex, body weight, and age. A 100-mg difference in brain weight is associated with a 4.4-mg difference in bulb weight. Bulbs gain in weight by 0.2 mg/week--a 1% increase that continues until at least 300 days of age. Males tend to have slightly larger bulbs than females. By combining data from both related crosses (F2 and RI) we identified four QTLs with selective effects on bulb size (genomewide p < .05). Bulb4a is located on chromosome 4 (Chr 4) and Bulb6a is located on Chr 6. Alleles inherited from B6 at both of these loci increase bulb weight by 0.5-1.0 mg. Bulb11a is located on proximal Chr 11 and Bulb17a is located on the proximal part of Chr 17. In contrast to the first two QTLs, B6 alleles at these two loci decrease bulb weight by 0.5-1.0 mg. Collectively, the four loci account for 20% of the phenotypic variance in bulb weight. Williams RW, Airey DC, Kulkarni A, Zhou G, Lu L Genetic dissection of the olfactory bulbs of mice: QTLs on four chromosomes modulate bulb size. Behav Genet 31(1) 61-77 Jan 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11529276&dopt=Abstract 11529276 01 80 days 80 MF 349 males and 321 females mg 20.9 23.1 22.3 21.2 20.2 22.0 17.7 20.3 18.0 18.7 18.8 21.5 21.1 18.7 18.2 18.9 21.0 16.9 17.6 17.9 19.1 19.1 17.8 20.4 21.7 20.3 23.0 24.0 17.5 23.0 22.4 19.5 22.0 20.9 6/12/2003 MK Sullivan 11529276.01 Olfactory Bulb Weight, adjusted [mg] Olfaction is influenced by a complex mix of environmental and genetic factors that modulate the production, migration, and maturation of cells in the olfactory bulbs. In this study we analyzed effects of sex, age, body weight, and brain weight on olfactory bulb size in sexually mature mice. We then used regression corrected values (residuals) to map quantitative trait loci (QTLs) that selectively modulate bulb weight. This biometric analysis has relied on an F2 intercross between C57BL/6J (B6) and DBA/2J (D2) inbred strains and a large sample of 35 BXD recombinant inbred (RI) strains. Bilateral bulb weight in adult mice ranges from 10 to 30 mg. Half of this remarkable variation can be predicted from differences in brain weight, sex, body weight, and age. A 100-mg difference in brain weight is associated with a 4.4-mg difference in bulb weight. Bulbs gain in weight by 0.2 mg/week--a 1% increase that continues until at least 300 days of age. Males tend to have slightly larger bulbs than females. By combining data from both related crosses (F2 and RI) we identified four QTLs with selective effects on bulb size (genomewide p < .05). Bulb4a is located on chromosome 4 (Chr 4) and Bulb6a is located on Chr 6. Alleles inherited from B6 at both of these loci increase bulb weight by 0.5-1.0 mg. Bulb11a is located on proximal Chr 11 and Bulb17a is located on the proximal part of Chr 17. In contrast to the first two QTLs, B6 alleles at these two loci decrease bulb weight by 0.5-1.0 mg. Collectively, the four loci account for 20% of the phenotypic variance in bulb weight. Williams RW, Airey DC, Kulkarni A, Zhou G, Lu L. Genetic dissection of the olfactory bulbs of mice: QTLs on four chromosomes modulate bulb size. Behav Genet 31(1) 61-77 Jan 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11529276&dopt=Abstract 11529276 02 80 days 80 MF 349 males and 321 females mg 21.9 0.4 21.6 0.3 20.7 0.2 21.1 0.7 18.3 0.5 22.0 0.4 19.3 0.2 20.0 0.4 18.7 0.4 20.0 0.5 19.4 0.2 19.9 0.5 18.0 0.5 19.7 0.4 21.0 0.4 18.6 0.6 20.9 0.5 17.3 0.5 19.8 0.7 18.7 0.5 18.6 0.7 18.3 0.5 20.3 0.3 19.7 0.4 20.1 0.6 20.7 0.6 21.4 0.6 20.1 0.3 20.3 0.4 23.2 0.4 23.6 1.0 18.1 0.5 21.2 2.0 22.5 0.7 20.4 0.3 20.3 0.7 19.3 0.1 6/12/2003 MK Sullivan 11529276.02 Olfactory Bulb Weight CV% Olfaction is influenced by a complex mix of environmental and genetic factors that modulate the production, migration, and maturation of cells in the olfactory bulbs. In this study we analyzed effects of sex, age, body weight, and brain weight on olfactory bulb size in sexually mature mice. We then used regression corrected values (residuals) to map quantitative trait loci (QTLs) that selectively modulate bulb weight. This biometric analysis has relied on an F2 intercross between C57BL/6J (B6) and DBA/2J (D2) inbred strains and a large sample of 35 BXD recombinant inbred (RI) strains. Bilateral bulb weight in adult mice ranges from 10 to 30 mg. Half of this remarkable variation can be predicted from differences in brain weight, sex, body weight, and age. A 100-mg difference in brain weight is associated with a 4.4-mg difference in bulb weight. Bulbs gain in weight by 0.2 mg/week--a 1% increase that continues until at least 300 days of age. Males tend to have slightly larger bulbs than females. By combining data from both related crosses (F2 and RI) we identified four QTLs with selective effects on bulb size (genomewide p < .05). Bulb4a is located on chromosome 4 (Chr 4) and Bulb6a is located on Chr 6. Alleles inherited from B6 at both of these loci increase bulb weight by 0.5-1.0 mg. Bulb11a is located on proximal Chr 11 and Bulb17a is located on the proximal part of Chr 17. In contrast to the first two QTLs, B6 alleles at these two loci decrease bulb weight by 0.5-1.0 mg. Collectively, the four loci account for 20% of the phenotypic variance in bulb weight. Williams RW, Airey DC, Kulkarni A, Zhou G, Lu L. Genetic dissection of the olfactory bulbs of mice: QTLs on four chromosomes modulate bulb size. Behav Genet 31(1) 61-77 Jan 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11529276&dopt=Abstract 11529276 03 80 days 80 MF 349 males and 321 females % 4.8 4.4 1.4 3.5 4.2 3.0 3.2 3.5 2.3 2.1 2.9 3.5 2.3 4.7 3.3 4.2 3.4 4.7 3.3 4.2 1.1 3.0 2.5 3.4 2.7 3.6 3.7 4.6 1.8 2.6 1.3 1.3 1.7 3.4 0.4 2.4 2.0 6/12/2003 MK Sullivan 11529276.03 Olfactory Bulb Weight, unadjusted [mg] Olfaction is influenced by a complex mix of environmental and genetic factors that modulate the production, migration, and maturation of cells in the olfactory bulbs. In this study we analyzed effects of sex, age, body weight, and brain weight on olfactory bulb size in sexually mature mice. We then used regression corrected values (residuals) to map quantitative trait loci (QTLs) that selectively modulate bulb weight. This biometric analysis has relied on an F2 intercross between C57BL/6J (B6) and DBA/2J (D2) inbred strains and a large sample of 35 BXD recombinant inbred (RI) strains. Bilateral bulb weight in adult mice ranges from 10 to 30 mg. Half of this remarkable variation can be predicted from differences in brain weight, sex, body weight, and age. A 100-mg difference in brain weight is associated with a 4.4-mg difference in bulb weight. Bulbs gain in weight by 0.2 mg/week--a 1% increase that continues until at least 300 days of age. Males tend to have slightly larger bulbs than females. By combining data from both related crosses (F2 and RI) we identified four QTLs with selective effects on bulb size (genomewide p < .05). Bulb4a is located on chromosome 4 (Chr 4) and Bulb6a is located on Chr 6. Alleles inherited from B6 at both of these loci increase bulb weight by 0.5-1.0 mg. Bulb11a is located on proximal Chr 11 and Bulb17a is located on the proximal part of Chr 17. In contrast to the first two QTLs, B6 alleles at these two loci decrease bulb weight by 0.5-1.0 mg. Collectively, the four loci account for 20% of the phenotypic variance in bulb weight. Williams RW, Airey DC, Kulkarni A, Zhou G, Lu L. Genetic dissection of the olfactory bulbs of mice: QTLs on four chromosomes modulate bulb size. Behav Genet 31(1) 61-77 Jan 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11529276&dopt=Abstract 11529276 04 80 days 80 MF 349 males and 321 females mg 22.7 19.8 21.6 21.2 21.2 20.3 22.6 21.7 18.6 20.4 18.5 20.9 19.0 21.7 22.2 18.6 18.8 17.9 20.8 18.1 17.3 17.4 17.7 19.2 19.1 18.6 21.0 19.8 21.0 23.8 24.4 18.2 19.9 23.1 20.4 21.7 21.4 6/12/2003 MK Sullivan 11529276.04 Brain Weight [mg] Olfaction is influenced by a complex mix of environmental and genetic factors that modulate the production, migration, and maturation of cells in the olfactory bulbs. In this study we analyzed effects of sex, age, body weight, and brain weight on olfactory bulb size in sexually mature mice. We then used regression corrected values (residuals) to map quantitative trait loci (QTLs) that selectively modulate bulb weight. This biometric analysis has relied on an F2 intercross between C57BL/6J (B6) and DBA/2J (D2) inbred strains and a large sample of 35 BXD recombinant inbred (RI) strains. Bilateral bulb weight in adult mice ranges from 10 to 30 mg. Half of this remarkable variation can be predicted from differences in brain weight, sex, body weight, and age. A 100-mg difference in brain weight is associated with a 4.4-mg difference in bulb weight. Bulbs gain in weight by 0.2 mg/week--a 1% increase that continues until at least 300 days of age. Males tend to have slightly larger bulbs than females. By combining data from both related crosses (F2 and RI) we identified four QTLs with selective effects on bulb size (genomewide p < .05). Bulb4a is located on chromosome 4 (Chr 4) and Bulb6a is located on Chr 6. Alleles inherited from B6 at both of these loci increase bulb weight by 0.5-1.0 mg. Bulb11a is located on proximal Chr 11 and Bulb17a is located on the proximal part of Chr 17. In contrast to the first two QTLs, B6 alleles at these two loci decrease bulb weight by 0.5-1.0 mg. Collectively, the four loci account for 20% of the phenotypic variance in bulb weight. Williams RW, Airey DC, Kulkarni A, Zhou G, Lu L. Genetic dissection of the olfactory bulbs of mice: QTLs on four chromosomes modulate bulb size. Behav Genet 31(1) 61-77 Jan 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11529276&dopt=Abstract 11529276 05 80 days 80 MF 349 males and 321 females mg 495 415 456 440 502 391 498 469 420 447 402 439 449 467 445 432 382 442 444 420 394 410 375 413 403 382 415 432 445 439 449 427 428 437 423 464 469 6/12/2003 MK Sullivan 11529276.05 Body Weight [g] Olfaction is influenced by a complex mix of environmental and genetic factors that modulate the production, migration, and maturation of cells in the olfactory bulbs. In this study we analyzed effects of sex, age, body weight, and brain weight on olfactory bulb size in sexually mature mice. We then used regression corrected values (residuals) to map quantitative trait loci (QTLs) that selectively modulate bulb weight. This biometric analysis has relied on an F2 intercross between C57BL/6J (B6) and DBA/2J (D2) inbred strains and a large sample of 35 BXD recombinant inbred (RI) strains. Bilateral bulb weight in adult mice ranges from 10 to 30 mg. Half of this remarkable variation can be predicted from differences in brain weight, sex, body weight, and age. A 100-mg difference in brain weight is associated with a 4.4-mg difference in bulb weight. Bulbs gain in weight by 0.2 mg/week--a 1% increase that continues until at least 300 days of age. Males tend to have slightly larger bulbs than females. By combining data from both related crosses (F2 and RI) we identified four QTLs with selective effects on bulb size (genomewide p < .05). Bulb4a is located on chromosome 4 (Chr 4) and Bulb6a is located on Chr 6. Alleles inherited from B6 at both of these loci increase bulb weight by 0.5-1.0 mg. Bulb11a is located on proximal Chr 11 and Bulb17a is located on the proximal part of Chr 17. In contrast to the first two QTLs, B6 alleles at these two loci decrease bulb weight by 0.5-1.0 mg. Collectively, the four loci account for 20% of the phenotypic variance in bulb weight. Williams RW, Airey DC, Kulkarni A, Zhou G, Lu L. Genetic dissection of the olfactory bulbs of mice: QTLs on four chromosomes modulate bulb size. Behav Genet 31(1) 61-77 Jan 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11529276&dopt=Abstract 11529276 06 80 days 80 MF 349 males and 321 females g 24.7 19.3 18.8 28.9 22.2 19.9 22.9 23.6 18.8 21.2 19.5 21.7 24.3 23.9 21.3 21.2 19.0 21.8 20.3 20.0 20.7 19.2 20.2 23.1 22.3 18.2 20.8 26.0 17.7 21.1 25.8 17.2 22.5 19.4 20.2 20.2 21.0 6/12/2003 MK Sullivan 11529276.06 Open-field activity following saline injection [number of crossings during 3 min] Recombinant inbred (RI) strains are valuable not only for detecting major gene segregation and linkage but also for identifying associations between behavior and quantitative trait loci (QTL) that account for relatively small amounts of variation in behaviors for which strain distribution patterns are not bimodal. When applied to published data on genetic markers and on behavior for BXD RI strains, the RI QTL association approach suggests the presence of QTLs on chromosomes 6 and 12 for open-field activity and on chromosomes 1, 2, and 17 for high-pressure seizure susceptibility. Because the RI QTL approach does not require that the progenitor inbred strains of a particular RI series differ, researchers could focus on the BXD RI series, for which the greatest number of genetic markers are available. Focusing on BXD would capitalize on the cumulative nature of RI research which permits analyses of QTL sources of genetic correlations across studies. Plomin R, McClearn GE,ÊGora-Maslak G,Ê Neiderhiser JM. Use of recombinant inbred strains to detect quantitative trait loci associated with behavior. Behav Genet 277(2) 99-116 Mar 1991 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2049054&dopt=Abstract 2049054 91264768 02 100 days 100 number of crossings during 3 min 160 140 180 180 190 160 120 80 140 120 160 100 160 140 160 180 160 120 140 80 180 100 7/14/2003 MK Sullivan 2049054.02 Plasma corticosterone levels 6 hr post 4 g/kg Ethanol [µg/dl] The genetic control over the corticosterone response to ethanol (EtOH) and its possible relationship to other EtOH-related traits was examined using BXD recombinant inbred (RI) strains derived from an F2 cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. Quantitative trait locus (QTL) analysis of corticosterone levels 1 hr following EtOH suggested the influence of a single major gene on this trait. Two loci were predicted to account for 47% of the genetic variance in plasma corticosterone levels 6 hr following EtOH, whereas 3 loci were predicted to account for 78% of the genetic variance in corticosterone levels 7 hr following EtOH. Markers associated with corticosterone levels 7 hr following EtOH and corrected corticosterone levels 6 hr post-EtOH overlapped with ones found to influence acute and chronic EtOH withdrawal severity, suggesting some degree of common genetic determination between these traits. Overall these results indicate that gene action significantly influences stress responsiveness and suggest possible chromosomal locations of these genes. Roberts AJ, Phillips TJ, Belknap JK, Finn DA, Keith LD. Genetic analysis of the corticosterone response to ethanol in BXD recombinant inbred mice Behav Neurosci 109(6) 1199-1208 Dec 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8748968&dopt=Abstract 8748968 96350725 05 65-115 days 65 115 Male 5-15 µg/dl 7 1.03 10.5 1.43 7.5 2.65 10 1.34 10 1.61 6 1.97 12 2.92 3.5 .94 10.5 1.38 7.5 1.20 8 1.35 7.5 1.49 7.5 .67 5 .83 6 1.25 10.5 2.36 3 1.03 4.5 1.68 7.5 1.22 10 .75 7.5 3.07 4 .83 4 1.60 12/26/2002 8748968.05 Plasma corticosterone levels 6 hr post saline [µg/dl] The genetic control over the corticosterone response to ethanol (EtOH) and its possible relationship to other EtOH-related traits was examined using BXD recombinant inbred (RI) strains derived from an F2 cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. Quantitative trait locus (QTL) analysis of corticosterone levels 1 hr following EtOH suggested the influence of a single major gene on this trait. Two loci were predicted to account for 47% of the genetic variance in plasma corticosterone levels 6 hr following EtOH, whereas 3 loci were predicted to account for 78% of the genetic variance in corticosterone levels 7 hr following EtOH. Markers associated with corticosterone levels 7 hr following EtOH and corrected corticosterone levels 6 hr post-EtOH overlapped with ones found to influence acute and chronic EtOH withdrawal severity, suggesting some degree of common genetic determination between these traits. Overall these results indicate that gene action significantly influences stress responsiveness and suggest possible chromosomal locations of these genes. Roberts AJ, Phillips TJ, Belknap JK, Finn DA, Keith LD. Genetic analysis of the corticosterone response to ethanol in BXD recombinant inbred mice Behav Neurosci 109(6) 1199-1208 Dec 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8748968&dopt=Abstract 8748968 96350725 06 65-115 days 65 115 Male 3-9 µg/dl 1 1.22 7.5 0.86 1 1.58 6 .71 2.5 .71 2 .39 3.5 0.00 3 1.07 2 1.06 5.5 1.05 4.5 0.83 3.5 1.30 6 .977 2 0.80 2.5 1.16 3.5 1.79 2.5 1.00 4 1.00 3 1.04 1.5 1.14 5 0.91 4 1.07 4.5 0.98 12/26/2002 8748968.06 Plasma corticosterone levels 7 hr post 4 g/kg Ethanol [µg/dl] The genetic control over the corticosterone response to ethanol (EtOH) and its possible relationship to other EtOH-related traits was examined using BXD recombinant inbred (RI) strains derived from an F2 cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. Quantitative trait locus (QTL) analysis of corticosterone levels 1 hr following EtOH suggested the influence of a single major gene on this trait. Two loci were predicted to account for 47% of the genetic variance in plasma corticosterone levels 6 hr following EtOH, whereas 3 loci were predicted to account for 78% of the genetic variance in corticosterone levels 7 hr following EtOH. Markers associated with corticosterone levels 7 hr following EtOH and corrected corticosterone levels 6 hr post-EtOH overlapped with ones found to influence acute and chronic EtOH withdrawal severity, suggesting some degree of common genetic determination between these traits. Overall these results indicate that gene action significantly influences stress responsiveness and suggest possible chromosomal locations of these genes. Roberts AJ, Phillips TJ, Belknap JK, Finn DA, Keith LD. Genetic analysis of the corticosterone response to ethanol in BXD recombinant inbred mice Behav Neurosci 109(6) 1199-1208 Dec 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8748968&dopt=Abstract 8748968 96350725 07 65-115 days 65 115 Male 5-15 µg/dl 7 1.37 12 1.90 4 1.45 10 2.07 12 3.68 12.5 2.35 5 1.04 13 2.87 10 2.10 9.5 2.40 6 0.63 6 1.08 9 2.06 7 1.04 5.5 0.77 4 1.42 8 0.87 9.5 2.99 15 3.42 24.5 4.72 8 1.58 15.5 1.69 16 2.00 8.5 3.16 13 2.10 12/26/2002 8748968.07 Handling-induced convulsion scores 7 hr post 4 g/kg Ethanol The genetic control over the corticosterone response to ethanol (EtOH) and its possible relationship to other EtOH-related traits was examined using BXD recombinant inbred (RI) strains derived from an F2 cross of C57BL/6J (B6) and DBA/2J (D2) progenitor strains. Quantitative trait locus (QTL) analysis of corticosterone levels 1 hr following EtOH suggested the influence of a single major gene on this trait. Two loci were predicted to account for 47% of the genetic variance in plasma corticosterone levels 6 hr following EtOH, whereas 3 loci were predicted to account for 78% of the genetic variance in corticosterone levels 7 hr following EtOH. Markers associated with corticosterone levels 7 hr following EtOH and corrected corticosterone levels 6 hr post-EtOH overlapped with ones found to influence acute and chronic EtOH withdrawal severity, suggesting some degree of common genetic determination between these traits. Overall these results indicate that gene action significantly influences stress responsiveness and suggest possible chromosomal locations of these genes. Roberts AJ, Phillips TJ, Belknap JK, Finn DA, Keith LD. Genetic analysis of the corticosterone response to ethanol in BXD recombinant inbred mice Behav Neurosci 109(6) 1199-1208 Dec 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8748968&dopt=Abstract 8748968 96350725 08 65-115 days 65 115 Male 5-15 0.2 0.19 3 0.19 0.8 0.29 2.4 0.75 0.9 0.15 0 0 0.9 0.23 2 0.25 0.7 0.15 0.4 0.20 1.8 0.37 1.4 0.28 0.9 0.08 0.4 0.22 0.3 0.14 0 0 0.9 0.27 0.8 0.15 0 0 1.2 0.18 0.8 0.16 0.1 0.07 2.3 0.21 0 0 1.8 0.41 12/26/2002 8748968.08 Preconditioned stimulus [% freezing] Fear conditioning shows associations formed between contextual or auditory stimuli with an unconditioned stimulus. Inbred mouse strains differ in their ability to demonstrate fear conditioning, suggesting at least a partial genetic influence. The present study identified the possible chromosomal loci regulating fear conditioning in BXD recombinant inbred strains using quantitative trait loci (QTL) analysis. Estimates of heritability for all 3 measures of conditioning were about .28. Correlational analyses between genetic markers and strain means identified multiple putative QTLs. The strongest associations were on Chromosomes 1 and 17 for freezing to the context, Chromosome 12 for freezing to an altered context, and Chromosome 1 for freezing to the auditory stimulus. Overlapping QTLs may indicate some common genes that underlie aspects of this learning task. Owen EH, Christensen SC, Paylor R, Wehner JM Identification of quantitative trait loci involved in contextual and auditory-cued fear conditioning in BXD recombinant inbred strains. Behav Neurosci 111(2) 292-300 Apr 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9106670&dopt=Abstract 9106670 97260550 03 60-134 days 60 134 MF 9-20 % freezing 32 0.423 10 0.200 5 1.69 11 2.31 5 1.38 30 12.00 15 3.23 22 5.00 7 2.00 20 4.46 6 2.00 17 2.58 6 2.08 27 6.62 35 4.62 35 6.77 15 3.46 10 3.34 32 3.62 32 4.31 0 0.00 5 1.69 40 5.31 6/12/2003 MK Sullivan 9106670.03 Floor preference test - average time on grid floor (control group) [s/min] table 2 col 4 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 14 56-125 days 56 125 Male 6-16 s/min 29.6 2.4 33.4 2.7 31.3 3.1 35.2 3.5 26.9 2.6 33.7 3.1 28.6 2.3 32.4 2.0 30.7 2.7 26.5 3.1 24.7 1.8 29.7 1.8 25.6 1.6 27.3 3.6 31.3 1.3 28.8 1.5 23.2 3.4 38.0 3.2 31.5 2.3 31.6 4.0 32.1 3.2 31.5 1.4 6/23/2003 MK Sullivan 7480533.14 Floor preference test, average time on grid textured floor (control group) [s/min] table 2 col 5 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 16 56-125 days 56 125 Male 6-16 s/min 41.5 3.8 40.2 1.8 29.4 2.4 30.1 3.5 29.3 1.6 31.4 2.9 33.4 1.3 43.8 3.2 29.0 1.5 40.0 4.2 30.6 2.2 40.7 2.9 29.5 1.7 24.1 1.6 48.0 2.7 37.9 1.8 26.6 2.3 20.9 2.4 34.8 2.4 38.3 4.5 31.7 2.1 66.8 5.7 6/23/2003 MK Sullivan 7480533.16 Floor preference test - preference for grid textured floor in Conditioned Place Preference Apparatus (experimental group)[activity/min] table 3 col 3 Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 06 56-125 days 56 125 Male 7-17 activity/min 38.5 2.5 42.8 2.4 31.0 1.9 37.8 2.5 27.9 0.9 31.4 1.4 33.5 1.8 47.3 1.9 25.8 1.7 37.1 2.9 26.8 1.9 40.2 2.5 30.1 1.5 21.2 1.4 52.2 2.3 39.9 1.7 26 1.4 22.9 1.3 36.2 2.1 42.3 2.8 32.7 2.2 88.7 4.1 6/23/2003 MK Sullivan 7480533.06 Granulocyte Colony Stimulating Factor induced Progenitor cell mobilization from bone marrow to blood [PB-CFC/µl] Granulocyte colony-stimulating factor (G-CSF) can effectively mobilize hematopoietic stem and progenitor cells from bone marrow into blood, thereby allowing peripheral blood stem cells (PBSCs) to be used for transplantation. The efficiency of PBSC mobilization response to G-CSF is a multigene trait. DBA/2 (high-responder) and C57BL/6 (low-responder) mice were used for a genetic analysis of G-CSF-induced progenitor release. Significant linkages were found on chromosome 2Êby analyzing segregation distortion among the high responders of 500Êbackcross mice and on chromosome 11Êby using the quantitative trait locus analysis of 26Êstrains of BXD recombinant inbred mice. Hasegawa M, Baldwin TM, Metcalf D, Foote SJ Progenitor cell mobilization by granulocyte colony-stimulating factor controlled by loci on chromosomes 2 and 11. Blood 95(5) 1872-1874 Mar 2000 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10688851&dopt=Abstract 10688851 01 7-11 wks 49 77 MF 2-3 PB-CFC/µl 0.6 0.5 0.5 1.0 0.6 6.8 0.7 0.6 0.9 3.6 2.1 4.0 2.0 1.4 3.1 1.2 1.0 6.7 5.2 1.4 2.5 1.6 2.8 1.0 2.2 7/7/2003 MK Sullivan Nathan Copeland 10688851.01 Retinal area [mm2] PURPOSE: Vision is critically dependent on genetic factors that influence the rate and duration of eye growth. The genetic basis of variation in eye size in mice was explored, and genes that modulate eye weight, lens weight, and retinal area were mapped. METHODS: Eyes of approximately 700 mice were weighed. Data were corrected by regression analysis to eliminate effects of sex, age, and body weight. Interval mapping was used to locate quantitative trait loci (QTLs) using recombinant inbred strains and F2 intercrosses between strains C57BL/6J and DBA/2J. RESULTS: Major QTLs were discovered near the centromere of chromosome 5 (Eye1: genomewide P < 0.005) and on proximal chromosome 17 near the mast cell protease 6 gene (Eye2, P < 0.05). Both QTLs have significant effects on eye size, lens weight, and retinal area. The DBA/2J alleles at Eye1 and Eye2 are partially dominant and increase eye weight by as much as 1.0 mg. Analysis of 183 F2 progeny confirmed and refined the chromosomal assignments of both Eye1 and Eye2. CONCLUSIONS: Eye1 and Eye2 are the first loci known to control normal variation in eye size in any mammal. The hepatic growth factor gene (Hgf), a potent mitogen expressed in the retina, pigment epithelium, and choroid, is a strong candidate for Eye1. The human homolog of Eye2 should map to chromosome 6p, 16q13.3, or 19q13, whereas that of Eye1 should map to 7q. Zhou G, Williams RW Eye1 and Eye2: gene loci that modulate eye size, lens weight, and retinal area in the mouse. Invest Ophthalmol Vis Sci 40(5) 817-825 Apr 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10102277&dopt=Abstract 10102277 99200400 05 106 days 106 MF 8-35 mm^2 18.5 20.1 19.8 20.2 19.1 19.8 18.6 19.3 20.2 18.9 19.3 18.7 19.3 19 18.1 19.7 18.8 16.2 19.5 18.2 17 17.6 18.9 17.8 19.3 18.4 19.2 19.3 6/12/2003 MK Sullivan 10102277.05 Retinal ganglion cell number [cells x1000] Common genetic polymorphisms-as opposed to rare mutations-generate almost all heritable differences in the size and structure of the CNS. Surprisingly, these normal variants have not previously been mapped or cloned in any vertebrate species. In a recent paper (), we suggested that much of the variation in retinal ganglion cell number in mice, and the striking bimodality of strain averages, are caused by one or two quantitative trait loci (QTLs). To test this idea, and to map genes linked to this variable and highly heritable quantitative trait, we have counted ganglion cells in 38 recombinant inbred strains (BXD and BXH) derived from parental strains that have high and low cell numbers. A genome-wide search using simple and composite interval-mapping techniques revealed a major QTL on chromosome (Chr) 11 in a 3 cM interval between Hoxb and Krt1 (LOD = 6.8; genome-wide p = 0.001) and possible subsidiary QTLs on Chr 2 and Chr 8. The Chr 11 locus, neuron number control 1 (Nnc1), accounts for one third of the genetic variance among BXH strains and more than half of that among BXD strains, but Nnc1 has no known effects on brain weight, eye weight, or total retinal cell number. Three strong candidate genes have been mapped previously to the same region as Nnc1. These genes-Rara, Thra, and Erbb2- encode receptors for retinoic acid, thyroxine, and neuregulin, respectively. Each receptor is expressed in the retina during development, and their ligands affect the proliferation or survival of retinal cells. Williams RW, Strom RC., Goldowitz D Natural variation in neuron number in mice is linked to a major quantitative trait locus on Chr 11. J Neurosci 18(1) 138-46 Jan 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9412494&dopt=Abstract 9412494 98075112 02 100 days 100 MF 5-11 cells x1000 55.4 0.8 63.4 1.2 60.3 1.1 65.9 1.8 75.5 1.3 62.7 0.9 62.8 2.1 65.6 1.7 61 1.1 56.8 2.1 54.7 1.7 64 1.6 63.8 1.1 64 1.3 55.1 0.9 67.1 1.3 59.9 1.9 60 1.5 64.5 1.1 53 1.0 62.4 1.0 53.8 1.5 50.8 1.1 52.4 1.9 63.6 1.4 66 1.3 66.6 1.2 75.8 2.2 6/18/2003 MK Sullivan 9412494.02 Retinal ganglion cell number (x1000) PURPOSE: Vision is critically dependent on genetic factors that influence the rate and duration of eye growth. The genetic basis of variation in eye size in mice was explored, and genes that modulate eye weight, lens weight, and retinal area were mapped. METHODS: Eyes of approximately 700 mice were weighed. Data were corrected by regression analysis to eliminate effects of sex, age, and body weight. Interval mapping was used to locate quantitative trait loci (QTLs) using recombinant inbred strains and F2 intercrosses between strains C57BL/6J and DBA/2J. RESULTS: Major QTLs were discovered near the centromere of chromosome 5 (Eye1: genomewide P < 0.005) and on proximal chromosome 17 near the mast cell protease 6 gene (Eye2, P < 0.05). Both QTLs have significant effects on eye size, lens weight, and retinal area. The DBA/2J alleles at Eye1 and Eye2 are partially dominant and increase eye weight by as much as 1.0 mg. Analysis of 183 F2 progeny confirmed and refined the chromosomal assignments of both Eye1 and Eye2. CONCLUSIONS: Eye1 and Eye2 are the first loci known to control normal variation in eye size in any mammal. The hepatic growth factor gene (Hgf), a potent mitogen expressed in the retina, pigment epithelium, and choroid, is a strong candidate for Eye1. The human homolog of Eye2 should map to chromosome 6p, 16q13.3, or 19q13, whereas that of Eye1 should map to 7q. Zhou G, Williams RW Eye1 and Eye2: gene loci that modulate eye size, lens weight, and retinal area in the mouse. Invest Ophthalmol Vis Sci 40(5) 817-825 Apr 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10102277&dopt=Abstract 10102277 99200400 06 106 days 106 MF 8-35 x1000 55.4 63.4 60.3 65.9 75.5 62.7 62.8 65.6 61 56.8 54.7 64 63.8 64 55.1 67.1 59.9 60 64.5 53 62.4 53.8 50.8 52.4 63.6 66 66.6 75.8 6/12/2003 MK Sullivan 10102277.06 Saccharin intakes post-saline, pre-exposed to saccharin, group 0 g/kg and trial 1 [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 01 56-125 days 56 125 Male 5-12 ml 3.44 0.15 2.47 0.19 3.14 0.21 3.35 0.25 3.2 0.14 2.87 0.08 2.36 0.12 3.33 0.22 3.26 0.17 2.69 0.23 3.1 0.11 3.85 0.14 3.84 0.22 3.32 0.20 3.79 0.29 3 0.43 2.71 0.21 3.09 0.13 2.75 0.17 2.56 0.20 3.57 0.26 3.55 0.26 12/26/2002 SACSsaccharin 9756038.01 Saccharin intakes post-saline, pre-exposed to saccharin, group 0 g/kg and trials 2-4 [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 02 56-125 days 56 125 Male 5-12 ml 3.15 0.15 2.77 0.15 2.84 0.23 3.74 0.36 3.25 0.21 2.88 0.09 2.41 0.13 3.46 0.21 3.09 0.08 2.54 0.18 2.87 0.11 3.75 0.08 3.93 0.12 3.02 0.13 3.66 0.23 3.08 0.48 2.6 0.16 2.47 0.12 2.63 0.17 2.73 0.15 3.2 0.19 3.7 0.25 12/26/2002 SACSsaccharin 9756038.02 Ethanol induced conditioned taste aversion to saccharin, group 2 g/kg and trial 1 [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 03 56-125 days 56 125 Male 4-20 ml 3.22 0.22 3.01 0.13 3.13 0.19 3.75 0.31 3.4 0.21 2.79 0.10 2.71 0.20 3.03 0.20 3.45 0.21 2.88 0.23 3.63 0.24 3.85 0.26 3.71 0.18 2.72 0.15 3.67 0.20 3.03 0.26 2.69 0.14 3.03 0.15 2.69 0.14 2.81 0.19 3.2 0.19 3.26 0.21 12/26/2002 SACSsaccharin 9756038.03 Ethanol induced conditioned taste aversion to saccharin, group 2 g/kg and trial 2-4 [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 04 56-125 days 56 125 Male 4-20 ml 2.99 0.12 2.83 0.11 2.87 0.19 3.44 0.46 2.24 0.27 2.49 0.11 2.75 0.20 2.69 0.28 2.73 0.13 2.55 0.13 3.34 0.25 3.16 0.19 3.47 0.14 2.82 0.14 3.24 0.24 2.8 0.19 2.32 0.17 2.14 0.12 2.62 0.12 2.55 0.22 3.08 0.11 3.04 0.12 12/26/2002 SACSsaccharin 9756038.04 Ethanol induced conditioned taste aversion to saccharin, group 4 g/kg and trial 1 [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 05 56-125 days 56 125 Male 5-17 ml 3.49 0.13 2.79 0.15 2.87 0.21 3.84 0.39 3.8 0.15 2.94 0.16 2.44 0.17 3.36 0.25 3.26 0.04 2.79 0.18 3.68 0.27 4.41 0.13 3.56 0.21 3.02 0.15 3.47 0.23 3.22 0.29 3.03 0.25 2.99 0.12 2.62 0.12 2.66 0.19 3.39 0.15 3.21 0.13 12/26/2002 SACSsaccharin 9756038.05 Ethanol induced conditioned taste aversion to saccharin, group 4 g/kg and trials 2-4 [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 06 56-125 day s 56 125 Male 5-17 ml 2.64 0.06 1.66 0.12 2.39 0.17 2.8 0.28 1.59 0.16 2.28 0.14 2.28 0.10 2.22 0.36 2.37 0.10 2.18 0.15 2.28 0.23 2.78 0.21 2.39 0.16 2.78 0.14 2.88 0.23 2.37 0.21 1.9 0.20 1.8 0.07 2.26 0.17 2.18 0.19 2.14 0.21 2.00 0.18 12/26/2002 SACSsaccharin 9756038.06 Saccharin intake post EtOH no saccharin pre-exposure group UP and trial 1 [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 07 56-125 days 56 125 Male 4-12 ml 2.93 0.09 3.2 0.17 2.8 0.20 3.3 0.15 3.41 0.14 2.77 0.11 2.74 0.23 3.16 0.18 2.83 0.16 3.2 0.23 3.1 0.23 3.47 0.30 3.79 0.16 3.16 0.20 2.94 0.20 2.61 0.20 2.58 0.18 3.12 0.18 2.74 0.22 2.41 0.17 3.33 0.18 3.49 0.20 12/26/2002 SACSsaccharin 9756038.07 Saccharin intake post EtOH no saccharin pre-exposure group UP and trials 2-4 [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 08 56-125 days 56 125 Male 4-12 ml 2.92 0.07 3.41 0.14 2.62 0.14 2.99 0.51 2.89 0.19 2.81 0.08 2.33 0.17 3.12 0.21 2.78 0.20 2.87 0.20 2.64 0..21 3.08 0.16 3.66 0.18 2.84 0.15 2.7 0.31 2.68 0.22 2.57 0.19 2.39 0.13 2.82 0.17 2.4 0.28 3.31 0.13 2.96 0.21 12/26/2002 SACSsaccharin 9756038.08 Saccharin (0.019 % w/v) vs. tap water preference ratios [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 09 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.81 0.06 0.56 0.17 0.41 0.06 0.43 0.13 0.88 0.06 0.84 0.11 0.58 0.08 0.6 0.10 0.91 0.04 0.59 0.09 0.65 0.13 0.63 0.07 0.77 0.13 0.44 0.09 0.68 0.11 0.54 0.16 0.64 0.08 0.62 0.09 0.73 0.12 0.59 0.13 0.61 0.14 0.58 0.11 12/26/2002 SACSsaccharin 9756038.09 Saccharin (0.038 % w/v) vs. tap water preference ratios [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 10 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.80 0.08 0.37 0.21 0.71 0.03 0.6 0.10 0.95 0.02 0.92 0.02 0.49 0.10 0.81 0.08 0.96 0.01 0.64 0.08 0.46 0.12 0.67 0.07 0.92 0.03 0.56 0.08 0.52 0.11 0.64 0.14 0.8 0.06 0.84 0.05 0.57 0.13 0.5 0.14 0.64 0.12 0.52 0.13 12/26/2002 SACSsaccharin 9756038.1 Saccharin (0.076 % w/v) vs. tap water preference ratios [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 11 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.90 0.05 0.66 0.22 0.72 0.08 0.78 0.06 0.99 0.00 0.95 0.00 0.78 0.09 0.89 0.04 0.99 0.00 0.85 0.04 0.79 0.07 0.81 0.04 0.85 0.13 0.75 0.06 0.85 0.08 0.66 0.09 0.93 0.03 0.9 0.05 0.88 0.06 0.62 0.14 0.9 0.07 0.72 0.12 12/26/2002 SACSsaccharin 9756038.11 Saccharin (0.152 % w/v) vs. tap water preference ratios [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 12 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.97 0.01 0.73 0.14 0.92 0.04 0.89 0.05 0.99 0.00 0.94 0.05 0.78 0.08 0.96 0.01 1 0.00 0.87 0.05 0.87 0.03 0.89 0.03 0.96 0.02 0.79 0.07 0.82 0.09 0.86 0.05 0.98 0.01 0.98 0.00 0.93 0.02 0.87 0.03 0.81 0.14 0.76 0.12 12/26/2002 SACSsaccharin 9756038.12 Saccharin (0.304 % w/v) vs. tap water preference ratios [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 13 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.98 0.00 0.72 0.22 0.95 0.03 0.95 0.01 0.98 0.01 0.99 0.01 0.96 0.02 0.96 0.02 0.99 0.00 0.94 0.02 0.93 0.02 0.9 0.07 0.87 0.11 0.93 0.02 0.93 0.05 0.92 0.03 0.99 0.00 0.99 0.00 0.96 0.02 0.91 0.05 0.93 0.06 0.95 0.01 12/26/2002 SACSsaccharin 9756038.13 Saccharin (0.608% w/v) vs. tap water preference ratios [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 14 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.99 0.00 0.85 0.05 0.98 0.01 0.98 0.01 0.99 0.00 0.98 0.00 0.93 0.05 0.89 0.10 1 0.00 0.94 0.02 0.97 0.01 0.97 0.01 0.98 0.01 0.91 0.02 0.95 0.04 0.94 0.02 0.99 0.00 0.98 0.01 0.99 0.00 0.9 0.04 0.96 0.02 0.84 0.10 12/26/2002 SACSsaccharin 9756038.14 Saccharin (1.216% w/v) vs. tap water preference ratios [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 15 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.98 0.01 1 0.00 0.97 0.01 0.97 0.02 0.99 0.01 0.99 0.00 0.95 0.03 0.8 0.12 0.99 0.00 0.97 0.01 0.95 0.02 0.98 0.01 0.85 0.13 0.95 0.02 0.96 0.03 1 0.00 0.99 0.00 0.98 0.00 0.88 0.07 0.91 0.04 0.97 0.02 0.97 0.02 12/26/2002 SACSsaccharin 9756038.15 Saccharin (2.432% w/v) vs. tap water preference ratios [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 16 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.80 0.08 0.33 0.06 0.87 0.05 0.59 0.09 0.83 0.05 0.97 0.01 0.58 0.10 0.26 0.08 0.93 0.03 0.75 0.08 0.69 0.12 0.38 0.02 0.61 0.12 0.48 0.08 0.54 0.09 0.65 0.16 0.94 0.02 0.9 0.03 0.42 0.09 0.75 0.05 0.73 0.14 0.43 0.13 12/26/2002 SACSsaccharin 9756038.16 Saccharin (4.864% w/v) vs. tap water preference ratios [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 17 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.14 0.00 0.06 0.00 0.1 0.04 0.09 0.03 0.23 0.05 0.4 0.11 0.2 0.04 0.04 0.00 0.38 0.05 0.23 0.09 0.18 0.07 0.11 0.02 0.17 0.05 0.12 0.03 0.08 0.02 0.22 0.08 0.26 0.04 0.44 0.00 0.16 0.00 0.29 0.06 0.24 0.06 0.04 0.01 12/26/2002 SACSsaccharin 9756038.17 Saline induced locomotor response distance traveled, 0-5 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 11 8-12wks 56 84 Male 4-18 cm 5131 284 2170 173 4018 428 1876 235 2893 263 1784 156 3817 249 1647 198 3998 847 2876 146 3481 261 1086 174 1603 225 3117 356 2888 241 2713 237 1929 99 1926 226 2511 305 2317 245 2391 199 2194 233 1449 177 4543 298 2128 184 2099 251 1559 131 6/6/2003 MK Sullivan SALBsaline 9880575.11 Saline induced locomotor response distance traveled, 5 - 10 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 12 8-12wks 56 84 Male 4-18 cm 3595 248 1894 136 2908 266 1767 243 2469 243 1807 158 3533 220 1333 147 2730 662 2356 149 2640 158 892 106 1752 159 3032 222 2900 204 2367 223 2200 91 1859 247 1864 244 1854 214 2316 220 1925 184 1645 140 4018 343 2143 171 2266 186 1789 149 6/6/2003 MK Sullivan SALBsaline 9880575.12 Saline induced locomotor response distance traveled, 10-15 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 13 8-12wks 56 84 Male 4-18 cm 2783 173 1582 138 2391 183 1442 250 2302 157 1753 162 2865 137 1166 166 2391 448 1806 145 2433 179 865 106 1612 146 2775 211 2625 185 1868 217 1852 147 1430 168 1573 217 1418 195 1752 214 1691 188 1476 173 3395 286 1850 226 2013 185 1657 127 6/6/2003 MK Sullivan SALBsaline 9880575.13 Saline induced locomotor response distance traveled, 15 -20 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 14 8-12wks 56 84 Male 4-18 cm 2580 186 1317 109 1964 123 1420 226 2272 196 1656 158 2531 175 1268 209 2084 584 2148 218 2658 205 954 80 1383 171 2642 227 2442 165 1794 187 1781 182 1347 115 1351 154 1340 233 1594 169 1797 254 1519 129 3083 280 1598 204 1775 161 1770 162 6/6/2003 MK Sullivan SALBsaline 9880575.14 Saline induced locomotor response distance traveled, 5-20 min time interval [cm] A two-stage strategy was used to identify and confirm quantitative trait loci (QTLs) associated with the changes in locomotor activity induced by a 1.5 gm/kg ethanol challenge. For stage 1, putative QTLs were identified by analysis of the strain means for 25 strains of the BXD recombinant inbred (RI) series (males only). QTLs were identified on chromosomes 1, 2, 4, and 6. The activity response to chlordiazepoxide generated similar QTLs on chromosomes 2 and 6. None of the QTLs were similar to those generated from analysis of the saline response data. For stage 2, 900 male C57BL/6J (B6) x DBA/2J (D2) F2 intercross animals were phenotyped for ethanol response, and the phenotypic extremes (those animals > and <1 SD from the mean) were identified. These extremes differed by >10,000 cm/15 min in their response to ethanol. The extreme progeny were used for a genome-wide scan both to confirm the putative RI-generated QTLs and to detect new QTLs. The F2 analysis generated no new QTLs with logarithm of the likelihood for linkage (LOD) scores >3. For RI-generated QTLs, only the QTL on chromosome 2 was confirmed (LOD = 5.3). The position of the peak LOD was estimated to be 47 cM with a 20 cM 1 LOD support interval; this QTL accounted for 6% of the phenotypic variance. The 1 LOD support interval overlaps with QTLs previously identified for alcohol preference and acute ethanol withdrawal (;; ). Demarest K,ÊMcCaughran J,ÊMahjubi E,ÊCipp L,ÊHitzemann R. Identification of an acute ethanol response quantitative trait locus on mouse chromosome 2. J Neurosci 19(2) 549-561 Jan 1999 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9880575&dopt=Abstract 9880575 99098941 15 8-12wks 56 84 Male 4-18 cm 8958 607 4793 383 7263 572 4629 718 7043 596 5216 477 8929 531 3767 522 7204 1694 6311 512 7731 541 2710 293 4747 477 8449 660 7966 553 6029 627 5833 419 4636 530 4787 615 4612 641 5663 603 5413 615 4640 443 10496 909 5590 601 6055 531 5215 438 6/6/2003 MK Sullivan SALBsaline 9880575.15 Seizure susceptibility to high atmospheric pressure at 100 atmospheres [measured at atm which seizure occurred] Recombinant inbred (RI) strains are valuable not only for detecting major gene segregation and linkage but also for identifying associations between behavior and quantitative trait loci (QTL) that account for relatively small amounts of variation in behaviors for which strain distribution patterns are not bimodal. When applied to published data on genetic markers and on behavior for BXD RI strains, the RI QTL association approach suggests the presence of QTLs on chromosomes 6 and 12 for open-field activity and on chromosomes 1, 2, and 17 for high-pressure seizure susceptibility. Because the RI QTL approach does not require that the progenitor inbred strains of a particular RI series differ, researchers could focus on the BXD RI series, for which the greatest number of genetic markers are available. Focusing on BXD would capitalize on the cumulative nature of RI research which permits analyses of QTL sources of genetic correlations across studies. Plomin R, McClearn GE,ÊGora-Maslak G,Ê Neiderhiser JM. Use of recombinant inbred strains to detect quantitative trait loci associated with behavior. Behav Genet 277(2) 99-116 Mar 1991 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2049054&dopt=Abstract 2049054 91264768 03 35-80 days 35 80 atm 89 71 89 89 71 83 83 74 77 83 83 71 89 86 83 89 83 74 77 74 83 89 74 7/14/2003 MK Sullivan 2049054.03 Seizure susceptibility to high atmospheric pressure at 1000 atmospheres [measured at atm which seizure occurred] Recombinant inbred (RI) strains are valuable not only for detecting major gene segregation and linkage but also for identifying associations between behavior and quantitative trait loci (QTL) that account for relatively small amounts of variation in behaviors for which strain distribution patterns are not bimodal. When applied to published data on genetic markers and on behavior for BXD RI strains, the RI QTL association approach suggests the presence of QTLs on chromosomes 6 and 12 for open-field activity and on chromosomes 1, 2, and 17 for high-pressure seizure susceptibility. Because the RI QTL approach does not require that the progenitor inbred strains of a particular RI series differ, researchers could focus on the BXD RI series, for which the greatest number of genetic markers are available. Focusing on BXD would capitalize on the cumulative nature of RI research which permits analyses of QTL sources of genetic correlations across studies. Plomin R, McClearn GE,ÊGora-Maslak G,Ê Neiderhiser JM. Use of recombinant inbred strains to detect quantitative trait loci associated with behavior. Behav Genet 277(2) 99-116 Mar 1991 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2049054&dopt=Abstract 2049054 91264768 04 35-80 days 35 80 atm 78 63 66 81 66 78 66 66 66 69 78 66 72 78 78 78 81 66 63 66 72 78 66 7/14/2003 MK Sullivan 2049054.04 Sleep need; Slow wave sleep delta EEG power after 6 hrs sleep deprivation [%] Delta power, a measure of EEG activity in the 1-4 Hz range, in slow-wave sleep (SWS) is in a quantitative and predictive relationship with prior wakefulness. Thus, sleep loss evokes a proportional increase in delta power, and excess sleep a decrease. Therefore, delta power is thought to reflect SWS need and its underlying homeostatically regulated recovery process. The neurophysiological substrate of this process is unknown and forward genetics might help elucidate the nature of what is depleted during wakefulness and recovered during SWS. We applied a mathematical method that quantifies the relationship between the sleep-wake distribution and delta power to sleep data of six inbred mouse strains. The results demonstrated that the rate at which SWS need accumulated varied greatly with genotype. This conclusion was confirmed in a "dose-response" study of sleep loss and changes in delta power; delta power strongly depended on both the duration of prior wakefulness and genotype. We followed the segregation of the rebound of delta power after sleep deprivation in 25 BXD recombinant inbred strains by quantitative trait loci (QTL) analysis. One "significant" QTL was identified on chromosome 13 that accounted for 49% of the genetic variance in this trait. Interestingly, the rate at which SWS need decreases did not vary with genotype in any of the 31 inbred strains studied. These results demonstrate, for the first time, that the increase of SWS need is under a strong genetic control, and they provide a basis for identifying genes underlying SWS homeostasis. Franken P, Chollet D, Tafti M The homeostatic regulation of sleep need is under genetic control. J Neurosci 21:2610-2621 21(8) 2610-2621 Apr 2001 Paul Franken, Didier Chollet, and Mehdi Tafti The Homeostatic Regulation of Sleep Need Is under Genetic Control J. Neurosci. 2001 21: 2610-2621. http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11306614&dopt=Abstract 11306614 01 67-142 days 67 142 Male 5 % 223.133 10.3 179.452 9.4 168.304 30.5 148.551 9.9 223.583 24.6 197.680 23.4 198.379 12.6 155.447 2.6 161.296 11.8 156.793 7.2 166.240 12.3 130.001 7.2 166.624 9.8 179.251 2.5 189.507 16.6 133.289 13.8 147.317 9.4 172.023 33.7 169.368 17.8 165.230 18.5 187.284 22.6 168.229 9.8 144.830 10.0 153.054 9.5 149.713 6.1 138.458 6.9 132.991 12.5 6/5/2003 MK Sullivan Rob Williams 11306614.01 Spiral ganglion cell density hook [cells per 10000 µm2] The effects of three putative genes which contribute to age-related hearing loss (AHL genes) were evaluated using auditory brainstem response (ABR) thresholds and post-mortem cochlear histopathology in 25 recombinant BXD inbred mouse strains, originally derived from C57BL/6J (B6) and DBA/2J (D2) progenitor strains. All BXD strains showed substantial elevation of ABR thresholds and loss of spiral ganglion cells (SGCs) during the first year of life. The findings are consistent with our genetic model in which D2 and B6 inbred strains both possess the Ahl (age-related hearing loss) gene, whereas D2 possesses two additional chromosomal loci with AHL genes (Ahl2 and Ahl3). The between-strain distribution in the severity of SGC loss and ABR threshold elevations suggests that the severity of hearing loss is determined in large part by the number of AH L genes an animal possesses and by additional genetic background effects. The present findings also demonstrate that, because BXD strains vary substantially in the rate and severity of progressive hearing loss (but are genetically closely related), they can provide powerful animal models for developmental studies of AHL. Willott JF, Erway LC Genetics of age-related hearing loss in mice. IV. Cochlear pathology and hearing loss in 25 BXD recombinant inbred mouse strains. Hear Res 119 (1-2) 27-36 May 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9641316&dopt=Abstract 9641316 98303018 01 1 year 365 MF cells per 10000 µm2 17 8 17 4 9 8 4 8 8 7 10 7 3 8 5 6 7 9 6 18 3 12 12 9 12 6 6/12/2003 MK Sullivan 9641316.01 Spiral ganglion cell density mid base [cells per 10000 µm2] The effects of three putative genes which contribute to age-related hearing loss (AHL genes) were evaluated using auditory brainstem response (ABR) thresholds and post-mortem cochlear histopathology in 25 recombinant BXD inbred mouse strains, originally derived from C57BL/6J (B6) and DBA/2J (D2) progenitor strains. All BXD strains showed substantial elevation of ABR thresholds and loss of spiral ganglion cells (SGCs) during the first year of life. The findings are consistent with our genetic model in which D2 and B6 inbred strains both possess the Ahl (age-related hearing loss) gene, whereas D2 possesses two additional chromosomal loci with AHL genes (Ahl2 and Ahl3). The between-strain distribution in the severity of SGC loss and ABR threshold elevations suggests that the severity of hearing loss is determined in large part by the number of AH L genes an animal possesses and by additional genetic background effects. The present findings also demonstrate that, because BXD strains vary substantially in the rate and severity of progressive hearing loss (but are genetically closely related), they can provide powerful animal models for developmental studies of AHL. Willott JF, Erway LC Genetics of age-related hearing loss in mice. IV. Cochlear pathology and hearing loss in 25 BXD recombinant inbred mouse strains. Hear Res 119 (1-2) 27-36 May 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9641316&dopt=Abstract 9641316 98303018 02 1 year 365 MF cells per 10000 µm2 43 11 15 5 17 22 6 12 13 8 25 17 3 21 9 23 13 22 5 23 11 19 17 25 31 19 6/12/2003 MK Sullivan 9641316.02 Spiral ganglion cell density mid-apical [cells per 10000 µm2] The effects of three putative genes which contribute to age-related hearing loss (AHL genes) were evaluated using auditory brainstem response (ABR) thresholds and post-mortem cochlear histopathology in 25 recombinant BXD inbred mouse strains, originally derived from C57BL/6J (B6) and DBA/2J (D2) progenitor strains. All BXD strains showed substantial elevation of ABR thresholds and loss of spiral ganglion cells (SGCs) during the first year of life. The findings are consistent with our genetic model in which D2 and B6 inbred strains both possess the Ahl (age-related hearing loss) gene, whereas D2 possesses two additional chromosomal loci with AHL genes (Ahl2 and Ahl3). The between-strain distribution in the severity of SGC loss and ABR threshold elevations suggests that the severity of hearing loss is determined in large part by the number of AH L genes an animal possesses and by additional genetic background effects. The present findings also demonstrate that, because BXD strains vary substantially in the rate and severity of progressive hearing loss (but are genetically closely related), they can provide powerful animal models for developmental studies of AHL. Willott JF, Erway LC Genetics of age-related hearing loss in mice. IV. Cochlear pathology and hearing loss in 25 BXD recombinant inbred mouse strains. Hear Res 119 (1-2) 27-36 May 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9641316&dopt=Abstract 9641316 98303018 03 1 year 365 MF cells per 10000 µm2 46 25 40 15 16 25 11 33 28 12 26 21 4 22 26 23 21 25 20 27 10 29 23 24 35 32 6/12/2003 MK Sullivan 9641316.03 Spiral ganglion cell density apical [cells per 10000 µm2] The effects of three putative genes which contribute to age-related hearing loss (AHL genes) were evaluated using auditory brainstem response (ABR) thresholds and post-mortem cochlear histopathology in 25 recombinant BXD inbred mouse strains, originally derived from C57BL/6J (B6) and DBA/2J (D2) progenitor strains. All BXD strains showed substantial elevation of ABR thresholds and loss of spiral ganglion cells (SGCs) during the first year of life. The findings are consistent with our genetic model in which D2 and B6 inbred strains both possess the Ahl (age-related hearing loss) gene, whereas D2 possesses two additional chromosomal loci with AHL genes (Ahl2 and Ahl3). The between-strain distribution in the severity of SGC loss and ABR threshold elevations suggests that the severity of hearing loss is determined in large part by the number of AH L genes an animal possesses and by additional genetic background effects. The present findings also demonstrate that, because BXD strains vary substantially in the rate and severity of progressive hearing loss (but are genetically closely related), they can provide powerful animal models for developmental studies of AHL. Willott JF, Erway LC Genetics of age-related hearing loss in mice. IV. Cochlear pathology and hearing loss in 25 BXD recombinant inbred mouse strains. Hear Res 119 (1-2) 27-36 May 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9641316&dopt=Abstract 9641316 98303018 04 1 year 365 MF cells per 10000 µm2 47 24 27 25 20 30 35 26 18 21 20 19 12 16 16 32 18 22 32 30 11 14 10 4 19 33 6/12/2003 MK Sullivan 9641316.04 Spiral ganglion cell density total [cells per 10000 µm2] The effects of three putative genes which contribute to age-related hearing loss (AHL genes) were evaluated using auditory brainstem response (ABR) thresholds and post-mortem cochlear histopathology in 25 recombinant BXD inbred mouse strains, originally derived from C57BL/6J (B6) and DBA/2J (D2) progenitor strains. All BXD strains showed substantial elevation of ABR thresholds and loss of spiral ganglion cells (SGCs) during the first year of life. The findings are consistent with our genetic model in which D2 and B6 inbred strains both possess the Ahl (age-related hearing loss) gene, whereas D2 possesses two additional chromosomal loci with AHL genes (Ahl2 and Ahl3). The between-strain distribution in the severity of SGC loss and ABR threshold elevations suggests that the severity of hearing loss is determined in large part by the number of AH L genes an animal possesses and by additional genetic background effects. The present findings also demonstrate that, because BXD strains vary substantially in the rate and severity of progressive hearing loss (but are genetically closely related), they can provide powerful animal models for developmental studies of AHL. Willott JF, Erway LC Genetics of age-related hearing loss in mice. IV. Cochlear pathology and hearing loss in 25 BXD recombinant inbred mouse strains. Hear Res 119 (1-2) 27-36 May 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9641316&dopt=Abstract 9641316 98303018 05 1 year 365 MF cells per 10000 µm2 168 68 100 49 62 85 56 79 67 48 81 64 22 67 56 84 59 78 53 98 35 74 62 62 97 90 6/12/2003 MK Sullivan 9641316.05 Stem cell frequency, CAFC day 35/100000 cells We evaluated in vivo interactions between extrinsic (growth factor induced) and intrinsic (genetically determined) effectors of mouse primitive hemopoietic stem cell proliferation and numbers. Accordingly, stem cell frequency and cell cycle kinetics were assessed in eight strains of inbred mice using the cobblestone area-forming cell (CAFC) assay. A strong inverse correlation was observed between mouse lifespan and the number of autonomously cycling progenitors (CAFC day 7) in the femur. The population size of primitive stem cells (CAFC day 35) varied widely (up to sevenfold) among strains, unlike total CAFC day 7 numbers (cycling and quiescent), which were similar. Administration of the early acting cytokine flt-3 ligand to these strains resulted in activation of quiescent primitive stem cells exclusively in strains with high endogenous stem cell numbers (DBA and AKR), but was unrelated to strain-specific progenitor cell cycling. To map loci affecting stem cell frequency, we quantified stem cells in BXD recombinant inbred mice (offspring of C57BL/6 and DBA/2). The resulting strain distribution pattern showed high concordance with a marker that mapped to chromosome 18 (19 cM). Linkage with this genomic interval was associated with a likelihood of odds score of 3.3, surpassing the level required for significance. Interestingly, this segment, containing the EGR-1 gene, shows synteny with human chromosome 5q, a region strongly associated with various hematological malignancies. Our findings indicate that a gene mapping to this region is mutated in either C57BL/6 or DBA/2 (and possibly AKR) mice. These studies in apparently healthy mice may facilitate the identification of a gene implicated in human 5q-syndromes. de Haan G, Van Zant G. Intrinsic and extrinsic control of hemopoietic stem cell numbers: mapping of a stem cell gene. J Exp Med 186(4) 529-536 Aug 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9254651&dopt=Abstract 9254651 01 6-8 wks 42 56 Female 3 CAFC day 35/100000 cells 1.2 3.3 1.0 3.4 2.9 1.6 2.1 3.5 8.22 1.6 0.9 2.6 2.1 2.4 2.3 2.1 1.9 2.2 2.2 1.8 1.8 1.2 1.8 2.5 .5 2.5 2.8 2.9 12/30/2002 Nathan Copeland 9254651.01 Striatum cholinergic neurons section 11 [number of neurons] Compared with the neuroleptic nonresponsive (NNR) mouse line, the neuroleptic responsive (NR) line has a significantly higher number of striatal cholinergic neurons (Hitzemann et al., 1993). We now report additional information on this genetic association. At the fifth selected generation, a new selection of the NR and NNR lines differed 5-fold in their ED50 values (1 vs. 5 mg/kg) for haloperidol-induced catalepsy and 20% in the number of striatal cholinergic neurons (higher in the NR line). This association was further examined in 10 standard inbred mouse strains; eight of the strains had been crossed to form the heterogeneous stock from which the new NR and NNR lines were selected. In this panel, we detected no significant association between number of cholinergic neurons and haloperidol response. To examine the similarities and differences in the modes of inheritance for the two phenotypes, we formed a full Mendelian cross from the C57BL/6 (B6) and DBA/2 (D2) mouse strains. The B6 and D2 strains differ 9-fold in their haloperidol ED50 values (3.9 vs. 0.4 mg/kg) and more than 30% in the number of cholinergic neurons (higher in the D2 strain). Haloperidol-induced catalepsy was described by a simple additive genetic model; the narrow sense heritability was 0.60. In contrast, for the number of cholinergic neurons, the B6 genotype was dominant and heterosis was detected in the F1 cross. Despite the differences in heritability, among B6D2 F2 individuals, increasing haloperidol sensitivity was associated with increasing numbers of striatal cholinergic neurons. The BXD recombinant inbred series (25 strains) showed a 16-fold range of variation in the haloperidol ED50 and a greater than 50% variation in the number of striatal cholinergic neurons. However, we detected no significant association between haloperidol response and number of cholinergic neurons. Overall, the data suggest that the genetic association between the phenotypes is modest, complex and detectable only with some genetic strategies. Dains K, Hitzemann B Genetics, neuroleptic response and the organization of cholinergic neurons in the mouse striatum. J Pharmacol Exp Ther 279(3) 1430-1438 Dec 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8968368&dopt=Abstract 8968368 97123119 01 8-10 wks 56 70 Male 9-12 Number of striatal cholinergic neurons 60 5 86 4 72 4 75 4 80 2 69 4 92 7 80 4 73 2 52 5 74 2 66 4 70 4 64 3 68 2 93 7 86 5 71 4 85 4 68 4 99 5 96 6 80 3 62 3 72 1 75 5 95 5 6/22/2003 MK Sullivan 8968368.01 Striatum cholinergic neurons section 14 [number of neurons] Compared with the neuroleptic nonresponsive (NNR) mouse line, the neuroleptic responsive (NR) line has a significantly higher number of striatal cholinergic neurons (Hitzemann et al., 1993). We now report additional information on this genetic association. At the fifth selected generation, a new selection of the NR and NNR lines differed 5-fold in their ED50 values (1 vs. 5 mg/kg) for haloperidol-induced catalepsy and 20% in the number of striatal cholinergic neurons (higher in the NR line). This association was further examined in 10 standard inbred mouse strains; eight of the strains had been crossed to form the heterogeneous stock from which the new NR and NNR lines were selected. In this panel, we detected no significant association between number of cholinergic neurons and haloperidol response. To examine the similarities and differences in the modes of inheritance for the two phenotypes, we formed a full Mendelian cross from the C57BL/6 (B6) and DBA/2 (D2) mouse strains. The B6 and D2 strains differ 9-fold in their haloperidol ED50 values (3.9 vs. 0.4 mg/kg) and more than 30% in the number of cholinergic neurons (higher in the D2 strain). Haloperidol-induced catalepsy was described by a simple additive genetic model; the narrow sense heritability was 0.60. In contrast, for the number of cholinergic neurons, the B6 genotype was dominant and heterosis was detected in the F1 cross. Despite the differences in heritability, among B6D2 F2 individuals, increasing haloperidol sensitivity was associated with increasing numbers of striatal cholinergic neurons. The BXD recombinant inbred series (25 strains) showed a 16-fold range of variation in the haloperidol ED50 and a greater than 50% variation in the number of striatal cholinergic neurons. However, we detected no significant association between haloperidol response and number of cholinergic neurons. Overall, the data suggest that the genetic association between the phenotypes is modest, complex and detectable only with some genetic strategies. Dains K, Hitzemann B Genetics, neuroleptic response and the organization of cholinergic neurons in the mouse striatum. J Pharmacol Exp Ther 279(3) 1430-1438 Dec 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8968368&dopt=Abstract 8968368 97123119 02 8-10 wks 56 70 Male 9-12 Number of striatal cholinergic neurons 91 5 116 3 104 4 103 3 103 4 117 4 122 4 124 3 115 3 89 2 101 4 94 4 93 4 86 7 132 3 129 5 139 3 110 4 111 6 93 3 111 6 139 4 130 5 97 4 97 3 109 4 145 5 6/22/2003 MK Sullivan 8968368.02 Striatum cholinergic neurons section 17 [number of neurons] Compared with the neuroleptic nonresponsive (NNR) mouse line, the neuroleptic responsive (NR) line has a significantly higher number of striatal cholinergic neurons (Hitzemann et al., 1993). We now report additional information on this genetic association. At the fifth selected generation, a new selection of the NR and NNR lines differed 5-fold in their ED50 values (1 vs. 5 mg/kg) for haloperidol-induced catalepsy and 20% in the number of striatal cholinergic neurons (higher in the NR line). This association was further examined in 10 standard inbred mouse strains; eight of the strains had been crossed to form the heterogeneous stock from which the new NR and NNR lines were selected. In this panel, we detected no significant association between number of cholinergic neurons and haloperidol response. To examine the similarities and differences in the modes of inheritance for the two phenotypes, we formed a full Mendelian cross from the C57BL/6 (B6) and DBA/2 (D2) mouse strains. The B6 and D2 strains differ 9-fold in their haloperidol ED50 values (3.9 vs. 0.4 mg/kg) and more than 30% in the number of cholinergic neurons (higher in the D2 strain). Haloperidol-induced catalepsy was described by a simple additive genetic model; the narrow sense heritability was 0.60. In contrast, for the number of cholinergic neurons, the B6 genotype was dominant and heterosis was detected in the F1 cross. Despite the differences in heritability, among B6D2 F2 individuals, increasing haloperidol sensitivity was associated with increasing numbers of striatal cholinergic neurons. The BXD recombinant inbred series (25 strains) showed a 16-fold range of variation in the haloperidol ED50 and a greater than 50% variation in the number of striatal cholinergic neurons. However, we detected no significant association between haloperidol response and number of cholinergic neurons. Overall, the data suggest that the genetic association between the phenotypes is modest, complex and detectable only with some genetic strategies. Dains K, Hitzemann B Genetics, neuroleptic response and the organization of cholinergic neurons in the mouse striatum. J Pharmacol Exp Ther 279(3) 1430-1438 Dec 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8968368&dopt=Abstract 8968368 97123119 03 8-10 wks 56 70 Male 9-12 Number of striatal cholinergic neurons 110 4 135 2 133 4 117 3 124 6 130 4 174 7 142 4 138 4 125 7 127 4 131 7 117 6 127 6 174 6 161 9 159 5 127 1 129 6 130 6 156 7 166 9 140 2 148 5 137 5 139 2 152 5 6/22/2003 MK Sullivan 8968368.03 Striatum cholinergic neurons section 20 [number of neurons] Compared with the neuroleptic nonresponsive (NNR) mouse line, the neuroleptic responsive (NR) line has a significantly higher number of striatal cholinergic neurons (Hitzemann et al., 1993). We now report additional information on this genetic association. At the fifth selected generation, a new selection of the NR and NNR lines differed 5-fold in their ED50 values (1 vs. 5 mg/kg) for haloperidol-induced catalepsy and 20% in the number of striatal cholinergic neurons (higher in the NR line). This association was further examined in 10 standard inbred mouse strains; eight of the strains had been crossed to form the heterogeneous stock from which the new NR and NNR lines were selected. In this panel, we detected no significant association between number of cholinergic neurons and haloperidol response. To examine the similarities and differences in the modes of inheritance for the two phenotypes, we formed a full Mendelian cross from the C57BL/6 (B6) and DBA/2 (D2) mouse strains. The B6 and D2 strains differ 9-fold in their haloperidol ED50 values (3.9 vs. 0.4 mg/kg) and more than 30% in the number of cholinergic neurons (higher in the D2 strain). Haloperidol-induced catalepsy was described by a simple additive genetic model; the narrow sense heritability was 0.60. In contrast, for the number of cholinergic neurons, the B6 genotype was dominant and heterosis was detected in the F1 cross. Despite the differences in heritability, among B6D2 F2 individuals, increasing haloperidol sensitivity was associated with increasing numbers of striatal cholinergic neurons. The BXD recombinant inbred series (25 strains) showed a 16-fold range of variation in the haloperidol ED50 and a greater than 50% variation in the number of striatal cholinergic neurons. However, we detected no significant association between haloperidol response and number of cholinergic neurons. Overall, the data suggest that the genetic association between the phenotypes is modest, complex and detectable only with some genetic strategies. Dains K, Hitzemann B Genetics, neuroleptic response and the organization of cholinergic neurons in the mouse striatum. J Pharmacol Exp Ther 279(3) 1430-1438 Dec 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8968368&dopt=Abstract 8968368 97123119 04 8-10 wks 56 70 Male 9-12 Number of striatal cholinergic neurons 105 3 134 5 109 2 106 3 115 6 125 5 135 5 132 3 125 4 117 6 123 4 136 4 116 3 133 5 134 4 153 7 143 5 122 2 135 6 120 5 138 7 156 5 116 4 142 3 117 3 124 4 137 6 6/22/2003 MK Sullivan 8968368.04 Striatum cholinergic neurons section 22 [number of neurons] Compared with the neuroleptic nonresponsive (NNR) mouse line, the neuroleptic responsive (NR) line has a significantly higher number of striatal cholinergic neurons (Hitzemann et al., 1993). We now report additional information on this genetic association. At the fifth selected generation, a new selection of the NR and NNR lines differed 5-fold in their ED50 values (1 vs. 5 mg/kg) for haloperidol-induced catalepsy and 20% in the number of striatal cholinergic neurons (higher in the NR line). This association was further examined in 10 standard inbred mouse strains; eight of the strains had been crossed to form the heterogeneous stock from which the new NR and NNR lines were selected. In this panel, we detected no significant association between number of cholinergic neurons and haloperidol response. To examine the similarities and differences in the modes of inheritance for the two phenotypes, we formed a full Mendelian cross from the C57BL/6 (B6) and DBA/2 (D2) mouse strains. The B6 and D2 strains differ 9-fold in their haloperidol ED50 values (3.9 vs. 0.4 mg/kg) and more than 30% in the number of cholinergic neurons (higher in the D2 strain). Haloperidol-induced catalepsy was described by a simple additive genetic model; the narrow sense heritability was 0.60. In contrast, for the number of cholinergic neurons, the B6 genotype was dominant and heterosis was detected in the F1 cross. Despite the differences in heritability, among B6D2 F2 individuals, increasing haloperidol sensitivity was associated with increasing numbers of striatal cholinergic neurons. The BXD recombinant inbred series (25 strains) showed a 16-fold range of variation in the haloperidol ED50 and a greater than 50% variation in the number of striatal cholinergic neurons. However, we detected no significant association between haloperidol response and number of cholinergic neurons. Overall, the data suggest that the genetic association between the phenotypes is modest, complex and detectable only with some genetic strategies. Dains K, Hitzemann B Genetics, neuroleptic response and the organization of cholinergic neurons in the mouse striatum. J Pharmacol Exp Ther 279(3) 1430-1438 Dec 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8968368&dopt=Abstract 8968368 97123119 05 8-10 wks 56 70 Male 9-12 Number of striatal cholinergic neurons 70 3 89 4 76 3 67 3 62 3 75 2 97 8 82 3 95 5 72 3 60 2 72 4 65 4 70 5 75 5 71 3 76 6 66 4 82 5 76 1 83 3 85 3 70 2 102 3 74 2 87 2 85 6 6/22/2003 MK Sullivan 8968368.05 Striatum cholinergic neurons section 24 [number of neurons] Compared with the neuroleptic nonresponsive (NNR) mouse line, the neuroleptic responsive (NR) line has a significantly higher number of striatal cholinergic neurons (Hitzemann et al., 1993). We now report additional information on this genetic association. At the fifth selected generation, a new selection of the NR and NNR lines differed 5-fold in their ED50 values (1 vs. 5 mg/kg) for haloperidol-induced catalepsy and 20% in the number of striatal cholinergic neurons (higher in the NR line). This association was further examined in 10 standard inbred mouse strains; eight of the strains had been crossed to form the heterogeneous stock from which the new NR and NNR lines were selected. In this panel, we detected no significant association between number of cholinergic neurons and haloperidol response. To examine the similarities and differences in the modes of inheritance for the two phenotypes, we formed a full Mendelian cross from the C57BL/6 (B6) and DBA/2 (D2) mouse strains. The B6 and D2 strains differ 9-fold in their haloperidol ED50 values (3.9 vs. 0.4 mg/kg) and more than 30% in the number of cholinergic neurons (higher in the D2 strain). Haloperidol-induced catalepsy was described by a simple additive genetic model; the narrow sense heritability was 0.60. In contrast, for the number of cholinergic neurons, the B6 genotype was dominant and heterosis was detected in the F1 cross. Despite the differences in heritability, among B6D2 F2 individuals, increasing haloperidol sensitivity was associated with increasing numbers of striatal cholinergic neurons. The BXD recombinant inbred series (25 strains) showed a 16-fold range of variation in the haloperidol ED50 and a greater than 50% variation in the number of striatal cholinergic neurons. However, we detected no significant association between haloperidol response and number of cholinergic neurons. Overall, the data suggest that the genetic association between the phenotypes is modest, complex and detectable only with some genetic strategies. Dains K, Hitzemann B Genetics, neuroleptic response and the organization of cholinergic neurons in the mouse striatum. J Pharmacol Exp Ther 279(3) 1430-1438 Dec 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8968368&dopt=Abstract 8968368 97123119 06 8-10 wks 56 70 Male 9-12 Number of striatal cholinergic neurons 47 2 67 3 40 2 52 2 51 1 49 1 48 3 44 2 52 2 46 2 47 3 44 1 42 2 48 5 46 3 62 3 46 1 47 3 53 2 44 2 52 3 51 2 44 2 61 2 45 2 58 3 54 3 6/22/2003 MK Sullivan 8968368.06 Hippocampus bilateral weight [mg] Notable differences in hippocampal structure are associated with intriguing differences in development and behavioral capabilities. We explored genetic and environmental factors that modulate hippocampal size, structure, and cell number using sets of C57BL/6J (B6) and DBA/2J (D2) mice; their F1 and F2 intercrosses (n = 180); and 35 lines of BXD recombinant inbred (RI) strains. Hippocampal weights of the parental strains differ by 20%. Estimates of granule cell number also differ by approximately 20%. Hippocampal weights of RI strains range from 21 to 31 mg, and those of individual F2 mice range from 23 to 36 mg (bilateral weights). Volume and granule cell number are well correlated (r = 0.7-0.8). Significant variation is associated with differences in age and sex. The hippocampus increases in weight by 0.24 mg per month, and those of males are 0.55 mg heavier (bilateral) than those of females. Heritability of variation is approximately 50%, and half of this genetic variation is generated by two quantitative trait loci that map to chromosome 1 (Hipp1a: genome-wide p < 0.005, between 65 and 100 cM) and to chromosome 5 (Hipp5a, p < 0.05, between 15 and 40 cM). These are among the first gene loci known to produce normal variation in forebrain structure. Hipp1a and Hipp5a individually modulate hippocampal weight by 1.0-2.0 mg, an effect size greater than that generated by age or sex. The Hipp gene loci modulate neuron number in the dentate gyrus, collectively shifting the population up or down by as much as 200,000 cells. Candidate genes for the Hipp loci include Rxrg and Fgfr3. Lu L, Airey DC, Williams RW Complex trait analysis of the hippocampus: mapping and biometric analysis of two novel gene loci with specific effects on hippocampal structure in mice. J Neurosci 21(10) 3503-3514 May 2001 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11331379&dopt=Abstract 11331379 02 ~ 80 days MF mg 28.4 23.0 27.6 24.9 29.9 26.7 28.7 25.7 25.2 26.7 23.5 26.4 26.2 28.1 26.0 28.0 24.3 25.6 24.5 24.5 21.6 23.7 22.9 24.1 23.3 21.3 23.7 24.1 26.7 24.4 26.4 26.4 23.6 28.3 25.3 30.8 27.5 7/23/2003 MK Sullivan Nathan Copeland 11331379.02 Hippocampus granule cell density per mm3 [x103] Notable differences in hippocampal structure are associated with intriguing differences in development and behavioral capabilities. We explored genetic and environmental factors that modulate hippocampal size, structure, and cell number using sets of C57BL/6J (B6) and DBA/2J (D2) mice; their F1 and F2 intercrosses (n = 180); and 35 lines of BXD recombinant inbred (RI) strains. Hippocampal weights of the parental strains differ by 20%. Estimates of granule cell number also differ by approximately 20%. Hippocampal weights of RI strains range from 21 to 31 mg, and those of individual F2 mice range from 23 to 36 mg (bilateral weights). Volume and granule cell number are well correlated (r = 0.7-0.8). Significant variation is associated with differences in age and sex. The hippocampus increases in weight by 0.24 mg per month, and those of males are 0.55 mg heavier (bilateral) than those of females. Heritability of variation is approximately 50%, and half of this genetic variation is generated by two quantitative trait loci that map to chromosome 1 (Hipp1a: genome-wide p < 0.005, between 65 and 100 cM) and to chromosome 5 (Hipp5a, p < 0.05, between 15 and 40 cM). These are among the first gene loci known to produce normal variation in forebrain structure. Hipp1a and Hipp5a individually modulate hippocampal weight by 1.0-2.0 mg, an effect size greater than that generated by age or sex. The Hipp gene loci modulate neuron number in the dentate gyrus, collectively shifting the population up or down by as much as 200,000 cells. Candidate genes for the Hipp loci include Rxrg and Fgfr3. Lu L, Airey DC, Williams RW Complex trait analysis of the hippocampus: mapping and biometric analysis of two novel gene loci with specific effects on hippocampal structure in mice. J Neurosci 21(10) 3503-3514 May 2001 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11331379&dopt=Abstract 11331379 03 ~ 80 days MF x103 857 871 1040 849 859 974 936 756 985 850 880 907 892 1010 954 921 928 828 1053 782 837 932 900 905 860 970 822 850 897 837 793 793 853 748 7/23/2003 MK Sullivan Nathan Copeland 11331379.03 Brain weight [mg] Notable differences in hippocampal structure are associated with intriguing differences in development and behavioral capabilities. We explored genetic and environmental factors that modulate hippocampal size, structure, and cell number using sets of C57BL/6J (B6) and DBA/2J (D2) mice; their F1 and F2 intercrosses (n = 180); and 35 lines of BXD recombinant inbred (RI) strains. Hippocampal weights of the parental strains differ by 20%. Estimates of granule cell number also differ by approximately 20%. Hippocampal weights of RI strains range from 21 to 31 mg, and those of individual F2 mice range from 23 to 36 mg (bilateral weights). Volume and granule cell number are well correlated (r = 0.7-0.8). Significant variation is associated with differences in age and sex. The hippocampus increases in weight by 0.24 mg per month, and those of males are 0.55 mg heavier (bilateral) than those of females. Heritability of variation is approximately 50%, and half of this genetic variation is generated by two quantitative trait loci that map to chromosome 1 (Hipp1a: genome-wide p < 0.005, between 65 and 100 cM) and to chromosome 5 (Hipp5a, p < 0.05, between 15 and 40 cM). These are among the first gene loci known to produce normal variation in forebrain structure. Hipp1a and Hipp5a individually modulate hippocampal weight by 1.0-2.0 mg, an effect size greater than that generated by age or sex. The Hipp gene loci modulate neuron number in the dentate gyrus, collectively shifting the population up or down by as much as 200,000 cells. Candidate genes for the Hipp loci include Rxrg and Fgfr3. Lu L, Airey DC, Williams RW Complex trait analysis of the hippocampus: mapping and biometric analysis of two novel gene loci with specific effects on hippocampal structure in mice. J Neurosci 21(10) 3503-3514 May 2001 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11331379&dopt=Abstract 11331379 04 ~ 80 days MF mg 496 415 433 417 544 386 477 448 415 453 384 412 447 455 435 436 399 429 441 435 388 412 373 415 403 367 409 444 427 420 413 405 411 418 405 438 443 7/23/2003 MK Sullivan Nathan Copeland 11331379.04 Hippocampus granule cell number [x103] Notable differences in hippocampal structure are associated with intriguing differences in development and behavioral capabilities. We explored genetic and environmental factors that modulate hippocampal size, structure, and cell number using sets of C57BL/6J (B6) and DBA/2J (D2) mice; their F1 and F2 intercrosses (n = 180); and 35 lines of BXD recombinant inbred (RI) strains. Hippocampal weights of the parental strains differ by 20%. Estimates of granule cell number also differ by approximately 20%. Hippocampal weights of RI strains range from 21 to 31 mg, and those of individual F2 mice range from 23 to 36 mg (bilateral weights). Volume and granule cell number are well correlated (r = 0.7-0.8). Significant variation is associated with differences in age and sex. The hippocampus increases in weight by 0.24 mg per month, and those of males are 0.55 mg heavier (bilateral) than those of females. Heritability of variation is approximately 50%, and half of this genetic variation is generated by two quantitative trait loci that map to chromosome 1 (Hipp1a: genome-wide p < 0.005, between 65 and 100 cM) and to chromosome 5 (Hipp5a, p < 0.05, between 15 and 40 cM). These are among the first gene loci known to produce normal variation in forebrain structure. Hipp1a and Hipp5a individually modulate hippocampal weight by 1.0-2.0 mg, an effect size greater than that generated by age or sex. The Hipp gene loci modulate neuron number in the dentate gyrus, collectively shifting the population up or down by as much as 200,000 cells. Candidate genes for the Hipp loci include Rxrg and Fgfr3. Lu L, Airey DC, Williams RW Complex trait analysis of the hippocampus: mapping and biometric analysis of two novel gene loci with specific effects on hippocampal structure in mice. J Neurosci 21(10) 3503-3514 May 2001 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11331379&dopt=Abstract 11331379 05 ~ 80 days MF x103 886 697 1067 639 835 1155 708 793 887 864 1019 766 800 1002 709 960 725 766 966 684 742 645 734 700 809 760 533 772 664 718 776 995 794 7/23/2003 MK Sullivan Nathan Copeland 11331379.05 Testicular weight [g] Testicular weights were studied in the mouse BXD recombinant inbred (RI) strains. These strains were derived from DBA/2J and C57BL/6J progenitors that differ significantly in their testicular weights (0.224 g +/- 0.015 vs. 0.161 g +/- 0.03, P < 0.0001). The heritability of testicular weights was calculated to be 0.53, and the minimum number of responsible effective factors was estimated to be 5.7. The total genome scanning of the BXD RI strains with over 1000 markers revealed a quantitative trait locus (QTL) on mouse Chromosome (Chr) 13 near the D13Mit3 marker (LOD score 6.9). This QTL region was designated Twq1 and associated with over 75% of genetic variability. Zidek V, Musilova A, Pintir J, Simakova M, Pravenec M. Genetic dissection of testicular weight in the mouse with the BXD recombinant inbred strains. Mamm Genome 9(7) 503-505 Jul 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9657844&dopt=Abstract 9657844 98325598 01 11 wks 77 Male 4-9 g 0.16 0.040 0.22 0.030 0.16 0.016 0.22 0.014 0.22 0.050 0.23 0.010 0.17 0.007 0.21 0.034 0.16 0.043 0.13 0.010 0.16 0.007 0.24 0.037 0.24 0.023 0.15 0.008 0.14 0.017 0.20 0.017 0.25 0.016 0.14 0.018 0.24 0.008 0.16 0.007 0.16 0.014 0.21 0.016 0.17 0.009 0.16 0.010 0.16 0.010 0.20 0.012 7/14/2003 MK Sullivan 9657844.01 Tolerance delta to ethanol induced ataxia - maximal threshold minus onset threshold Rapid tolerance to rotarod ataxia has previously been demonstrated in mice after sequential ethanol injections. Here we tested DBA/2J and C57BL/6J mice for initial ethanol sensitivity; DBA/2J mice were more sensitive (0.40 +/- 0.17 mg/g brain) than C57BL/6J mice (1.44 +/- 0.12 mg/g). We then monitored the development of tolerance by quantifying blood ethanol concentrations at the recovery from ataxia over five sequential injections; tolerance reached a plateau in about 5 hr. DBA/2J mice became very tolerant (final ethanol threshold 3.47 +/- 0.16 mg/ml, an increase of 3.07 mg/ml, or 8.7-fold above base line); B6 became slightly tolerant (final ethanol threshold 2.62 +/- 12 mg/ml, and increase of 1.18, or 1.8-fold above base line). Therefore, by the end of the treatment regimen, the rank order of sensitivity of the two strains had reversed. We then tested 25 recombinant inbred strains from among strains representing a cross between C57BL/6J and DBA/2J inbred strains, followed by a quantitative trait locus analysis with a database of 1522 markers to identify provisional loci. This procedure identified 19 markers on 11 chromosomes for initial sensitivity, 18 markers on 9 chromosomes for tolerance (delta) and 21 markers on 11 chromosomes for tolerance (fold-increase). Of these, 17 markers were in common, which suggests that initial sensitivity and tolerance share substantial genetic codetermination. Major candidate loci will be confirmed by genotyping B6D2F2 offspring that have been tested for initial sensitivity and tolerance. Gallaher EJ, Jones GE Mapping the genes for haloperidol-induced catalepsy. J Pharmacol Exp Ther 277(2) 604-612 May 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627537&dopt=Abstract 8627537 96210104 03 44-135 days 44 135 Male 1.18 3.07 2.54 1.85 1.95 1.19 2.36 2.47 2.36 1.69 2.56 1.85 2.25 1.66 1.58 1.83 1.86 2.79 2.22 2.54 2.1 1.87 2.52 1.54 2.49 1.42 3.05 12/19/2002 8627537.03 Tolerance fold-increase to ethanol induced ataxia - maximal threshold divided by onset threshold Rapid tolerance to rotarod ataxia has previously been demonstrated in mice after sequential ethanol injections. Here we tested DBA/2J and C57BL/6J mice for initial ethanol sensitivity; DBA/2J mice were more sensitive (0.40 +/- 0.17 mg/g brain) than C57BL/6J mice (1.44 +/- 0.12 mg/g). We then monitored the development of tolerance by quantifying blood ethanol concentrations at the recovery from ataxia over five sequential injections; tolerance reached a plateau in about 5 hr. DBA/2J mice became very tolerant (final ethanol threshold 3.47 +/- 0.16 mg/ml, an increase of 3.07 mg/ml, or 8.7-fold above base line); B6 became slightly tolerant (final ethanol threshold 2.62 +/- 12 mg/ml, and increase of 1.18, or 1.8-fold above base line). Therefore, by the end of the treatment regimen, the rank order of sensitivity of the two strains had reversed. We then tested 25 recombinant inbred strains from among strains representing a cross between C57BL/6J and DBA/2J inbred strains, followed by a quantitative trait locus analysis with a database of 1522 markers to identify provisional loci. This procedure identified 19 markers on 11 chromosomes for initial sensitivity, 18 markers on 9 chromosomes for tolerance (delta) and 21 markers on 11 chromosomes for tolerance (fold-increase). Of these, 17 markers were in common, which suggests that initial sensitivity and tolerance share substantial genetic codetermination. Major candidate loci will be confirmed by genotyping B6D2F2 offspring that have been tested for initial sensitivity and tolerance. Gallaher EJ, Jones GE Mapping the genes for haloperidol-induced catalepsy. J Pharmacol Exp Ther 277(2) 604-612 May 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8627537&dopt=Abstract 8627537 96210104 04 44-135 days 44 135 Male 1.82 8.68 3.1 2.7 3.44 2.16 4.06 3.13 3.68 2.8 4.61 3.31 6.49 2.36 2.23 2.87 2.74 6.69 3.47 4.53 2.96 3.34 4.65 2.12 3.42 2.23 7.93 12/19/2002 8627537.04 Saccharin Preference vs Water Ratio [%] The sac locus, with a major effect on saccharin preference, was discovered by Fuller (1974) in C57BL/6J (B6), DBA/2J (D2), and derived crosses, and is now supported in the BXD/Ty recombinant inbred (RI) series by a marked bimodal distribution in saccharin preference among 20 strains. The B6 allele led to increased saccharin preference compared to the D2 allele. Since the search for bimodal distributions reflecting major gene loci is an essential part of RI strain analysis, a new statistical method is proposed to test for bimodality, and comparisons are made to previously proposed methods. Another new RI method, quantitative trait loci (QTL) analysis, allows provisional detection and mapping of minor as well as major gene loci. Using this method as a screen, significant associations with saccharin preference were suggested with marker loci on portions of six chromosomes. One of these, the D12nyu1 locus on chromosome 12, was independently supported in a panel of standard (non-RI) inbred strains also tested for saccharin preference. It is unclear whether this reflects the sac locus. Belknap JK, Crabbe JC, Plomin R, McClearn GE, Sampson KE, O'Toole LA, Gora-Maslak G. Single-locus control of saccharin intake in BXD/Ty recombinant inbred (RI) mice: some methodological implications for RI strain analysis Behav Genet 22(1) 81-100 Jan 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1590732&dopt=Abstract 1590732 01 8-12 wks 56 84 Male 4-8 % 96 1 59 10 74 4 82 7 90 5 91 1 57 11 60 12 77 6 57 8 85 8 82 8 86 1 77 10 61 14 61 14 79 8 91 2 64 16 76 9 87 4 83 5 6/25/2003 MK Sullivan 1590732.01 Saccharin Consumption [mg/kg/day] The sac locus, with a major effect on saccharin preference, was discovered by Fuller (1974) in C57BL/6J (B6), DBA/2J (D2), and derived crosses, and is now supported in the BXD/Ty recombinant inbred (RI) series by a marked bimodal distribution in saccharin preference among 20 strains. The B6 allele led to increased saccharin preference compared to the D2 allele. Since the search for bimodal distributions reflecting major gene loci is an essential part of RI strain analysis, a new statistical method is proposed to test for bimodality, and comparisons are made to previously proposed methods. Another new RI method, quantitative trait loci (QTL) analysis, allows provisional detection and mapping of minor as well as major gene loci. Using this method as a screen, significant associations with saccharin preference were suggested with marker loci on portions of six chromosomes. One of these, the D12nyu1 locus on chromosome 12, was independently supported in a panel of standard (non-RI) inbred strains also tested for saccharin preference. It is unclear whether this reflects the sac locus. Belknap JK, Crabbe JC, Plomin R, McClearn GE, Sampson KE, O'Toole LA, Gora-Maslak G. Single-locus control of saccharin intake in BXD/Ty recombinant inbred (RI) mice: some methodological implications for RI strain analysis Behav Genet 22(1) 81-100 Jan 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1590732&dopt=Abstract 1590732 02 8-12 wks 56 84 Male 4-8 mg/kg/day 677 20 294 47 333 19 473 53 1228 186 519 34 267 55 286 68 475 33 253 51 601 63 457 58 458 31 436 53 354 101 264 61 380 41 500 51 477 142 358 80 469 36 450 36 6/25/2003 MK Sullivan 1590732.02 Parity distribution of MMTV virus-specific RNA (Primiparous) [%] The transcriptional activities of the eleven mouse mammary tumor virus (MMTV) proviruses endogenous to two sets of recombinant inbred (RI) mouse strains, BXD and BXH, were characterized. Comparison of the levels of virus-specific RNA quantitated in each strain showed no direct relationship between the presence of a particular endogenous provirus or with increasing numbers of proviruses. Association of specific genetic markers with the level of MMTV-specific RNA was examined by using multiple regression analysis. Several cellular loci as well as proviral loci were identified that were significantly associated with viral expression. Importantly, these cellular loci associated with MMTV expression segregated independently of viral sequences. Traina-Dorge VL, Carr JK, Bailey-Wilson JE, Elston RC, Taylor BA, Cohen JC. Cellular genes in the mouse regulate in trans the expression of endogenous mouse mammary tumor viruses. Genetics 111(3) 597-615 Nov 1985 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2996982&dopt=Abstract 2996982 01 3-9 months 90 270 Female % 0.0265 0.0091 0.0160 0.0001 0.0216 0.0070 0.0062 0.0029 0.0230 0.0100 0.0192 0.0066 0.0138 0.0100 0.0064 0.0021 0.0141 0.0040 0.0120 0.0041 0.0149 0.0013 0 0 0.0134 0.0076 0.0067 0.0018 0.0118 0.0058 0.0198 0.0067 0.0062 0.0019 0.0030 0.0011 0.0160 0.0001 0.0107 0.0051 0.0268 0.0072 0.0077 0.0037 0.0198 0.0067 0.0190 0.0084 0.0267 0.0092 0.0240 0.0092 6/25/2003 MK Sullivan 2996982.01 Parity distribution of MMTV virus-specific RNA (Multiparous) [%] The transcriptional activities of the eleven mouse mammary tumor virus (MMTV) proviruses endogenous to two sets of recombinant inbred (RI) mouse strains, BXD and BXH, were characterized. Comparison of the levels of virus-specific RNA quantitated in each strain showed no direct relationship between the presence of a particular endogenous provirus or with increasing numbers of proviruses. Association of specific genetic markers with the level of MMTV-specific RNA was examined by using multiple regression analysis. Several cellular loci as well as proviral loci were identified that were significantly associated with viral expression. Importantly, these cellular loci associated with MMTV expression segregated independently of viral sequences. Traina-Dorge VL, Carr JK, Bailey-Wilson JE, Elston RC, Taylor BA, Cohen JC. Cellular genes in the mouse regulate in trans the expression of endogenous mouse mammary tumor viruses. Genetics 111(3) 597-615 Nov 1985 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2996982&dopt=Abstract 2996982 02 3-9 months 90 270 Female % 0.024 0.0090 0.032 0 0.0077 0.0029 0.028 0.0068 0.0212 0.0091 0.0161 0 0.0213 0.0083 0.0213 0.0083 0.0240 0.0112 0.0034 0.0021 0.0252 0.0081 0.0161 0 0.0214 0.0067 0.0064 0.0019 0.0160 0 0.0133 0.0040 0.0240 0.0072 0.0184 0.0051 0.0230 0.0076 0.0160 0 0.0160 0 0.0310 0.0190 6/25/2003 MK Sullivan 2996982.02 Morphine analgesia in response to 16 mg/kg morphine [%MPE] A quantitative trait locus (QTL) was detected and mapped to proximal chromosome 10 near the markers Mpmv5 and D10Mit51 with a strong influence on morphine-induced analgesia in the BXD recombinant inbred (RI) strains and in an F2 cross (B6D2F2) between the BXD progenitor strains, C57BL/6 and DBA/2. A LOD score of 3.9 (p < .00002) was seen for analgesia using the hot plate assay. Naloxone Bmax was also associated with this chromosome region in BXD RI mice. The mu opioid receptor gene (Oprm) has recently been mapped to this same chromosome region. The observation that several morphine-related traits and naloxone Bmax appear to be partly determined by this presumed single locus is consistent with the hypothesis that the mu opioid receptor gene, or one of its modulators, is the basis for the QTL. Belknap JK, Mogil JS, Helms ML, Richards SP, O'Toole LA, Bergeson SE, Buck KJ. Localization to chromosome 10 of a locus influencing morphine analgesia in crosses derived from C57BL/6 and DBA/2 strains. Life Sci 57(10) PL117-PL124 Oct 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7643715&dopt=Abstract 7643715 01 100 days 100 Male 8 % MPE 13 2.2 82 11.7 63 5.6 73 8.8 45 7.8 16 5.4 72 6.3 50 10.9 10 2.7 20 2.3 23 8.2 32 6.9 25 9.8 33 8.2 18 1.6 12 2.2 60 9.6 80 7.1 30 9.0 55 8.8 45 5.8 18 0.7 6/11/2003 MK Sullivan 7643715.01 [3H]-naloxone Bmax [pM] A quantitative trait locus (QTL) was detected and mapped to proximal chromosome 10 near the markers Mpmv5 and D10Mit51 with a strong influence on morphine-induced analgesia in the BXD recombinant inbred (RI) strains and in an F2 cross (B6D2F2) between the BXD progenitor strains, C57BL/6 and DBA/2. A LOD score of 3.9 (p < .00002) was seen for analgesia using the hot plate assay. Naloxone Bmax was also associated with this chromosome region in BXD RI mice. The mu opioid receptor gene (Oprm) has recently been mapped to this same chromosome region. The observation that several morphine-related traits and naloxone Bmax appear to be partly determined by this presumed single locus is consistent with the hypothesis that the mu opioid receptor gene, or one of its modulators, is the basis for the QTL. Belknap JK, Mogil JS, Helms ML, Richards SP, O'Toole LA, Bergeson SE, Buck KJ. Localization to chromosome 10 of a locus influencing morphine analgesia in crosses derived from C57BL/6 and DBA/2 strains. Life Sci 57(10) PL117-PL124 Oct 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7643715&dopt=Abstract 7643715 02 100 days 100 Male 6 pM 84 1.9 95 2.6 104 7.1 90 9.2 92 7.1 95 2.6 100 0.7 90 9.7 90 1.8 83 5.0 76 4.0 84 4.7 83 2.8 74 1.7 88 8.2 86 5.3 92 4.0 90 3.7 103 3.5 86 1.8 6/11/2003 MK Sullivan 7643715.02 Ethanol withdrawal handling induced convulsions, 2 - 12 hours after 4 g/kg 20% v/v EtOH, Area Under Curve Alcohol dependence (alcoholism) is accompanied by evidence of tolerance, withdrawal (physiological dependence), or compulsive behavior related to alcohol use. Studies of strain and individual differences using animal models for acute physiological dependence liability are useful means to identify potential genetic determinants of liability in humans. Behavioral and quantitative trait analyses were conducted using animal models for high risk versus resistance to acute physiological dependence. Using a two-step genetic mapping strategy, loci on mouse chromosomes 1,æ4,æand 11æwere mapped that contain genes that influence alcohol withdrawal severity. In the aggregate, these three risk markers accounted for 68% of the genetic variability in alcohol withdrawal. Candidate genes in proximity to the chromosome 11ælocus include genes encoding the 1, 6, and 2 subunits of type-A receptors for the inhibitory neurotransmitter, GABA. In addition, suggestive linkage is indicated for two loci on mouse chromosome 2,æone near Gad1 encoding glutamic acid decarboxylase, and the other near the El2 locus which influences the seizure phenotype in the neurological mutant strain El. The present analyses detect and map some of the loci that increase risk to develop physiological dependence and may facilitate identification of genes related to the development of alcoholism. Syntenic conservation between human and mouse chromosomes suggests that human homologs of genes that increase risk for physiological dependence may localize to 1q21-q32, 2q24-q37/11p13, 9p21-p23/1p32-p22.1, and 5q32-q35. Buck KJ, Metten P, Belknap JK, Crabbe JC. Quantitative Trait Loci Involved in Genetic Predisposition to Acute Alcohol Withdrawal in Mice J Neurosci 17(10) 3946-3955 May 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9133412&dopt=Abstract 9133412 01 8-15 wks 56 105 MF 6.8 15.5 14.5 13 14.2 2.7 7.9 18.7 5 16.4 10.4 4.3 7 4.5 9.3 9.8 2.5 6.4 11.1 6.7 1.5 0 6.4 6/11/2003 MK Sullivan 9133412.01 Baseline handling induced convulsions Alcohol dependence (alcoholism) is accompanied by evidence of tolerance, withdrawal (physiological dependence), or compulsive behavior related to alcohol use. Studies of strain and individual differences using animal models for acute physiological dependence liability are useful means to identify potential genetic determinants of liability in humans. Behavioral and quantitative trait analyses were conducted using animal models for high risk versus resistance to acute physiological dependence. Using a two-step genetic mapping strategy, loci on mouse chromosomes 1,æ4,æand 11æwere mapped that contain genes that influence alcohol withdrawal severity. In the aggregate, these three risk markers accounted for 68% of the genetic variability in alcohol withdrawal. Candidate genes in proximity to the chromosome 11ælocus include genes encoding the 1, 6, and 2 subunits of type-A receptors for the inhibitory neurotransmitter, GABA. In addition, suggestive linkage is indicated for two loci on mouse chromosome 2,æone near Gad1 encoding glutamic acid decarboxylase, and the other near the El2 locus which influences the seizure phenotype in the neurological mutant strain El. The present analyses detect and map some of the loci that increase risk to develop physiological dependence and may facilitate identification of genes related to the development of alcoholism. Syntenic conservation between human and mouse chromosomes suggests that human homologs of genes that increase risk for physiological dependence may localize to 1q21-q32, 2q24-q37/11p13, 9p21-p23/1p32-p22.1, and 5q32-q35. Buck KJ, Metten P, Belknap JK, Crabbe JC. Quantitative Trait Loci Involved in Genetic Predisposition to Acute Alcohol Withdrawal in Mice J Neurosci 17(10) 3946-3955 May 1997 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9133412&dopt=Abstract 9133412 02 8-15 wks 56 105 MF 0.93 0.45 1.87 1.81 1.25 0.44 1.17 1.85 5.2 1.59 1.91 0.13 0.67 5 0.64 0.69 0.19 00.24 1.78 0.89 0.15 0 5 6/11/2003 MK Sullivan 9133412.02 BCG induced anergy (delayed type hypersensitivity)-footpad swelling in response to BCG [mm] We previously reported that BCG-induced anergy in mice (evaluated by delayed hypersensitivity to sheep erythrocytes) is unigenic and influenced by genes linked to the immunoglobulin heavy chain allotype (Igh). Using congenic mice (either H-2k or H-2b), we could not detect H-2-linked control of anergy. The current study re-examines this issue by using both BXD (H-2b or H-2d) and BXH (H-2b or H-2k) recombinant inbred (RI) mice as well as H-2 recombinant mice of different haplotypes. BXD RI (H-2b) mice were more anergic than BXD RI (H-2d) animals. Also, BXD RI (Ighb animals were more anergic than BXD RI (Ighc) mice. By evaluating combinations of H-2 haplotypes and Igh allotypes, we found the most anergic animals to be H-2b, Ighb. BCG-induced anergy then appears to be influenced by genes linked to both the H-2 and Igh complexes. BCG-induced anergy developed in H-2 recombinant mice (C57BL/10 background) that were either H-2b or H-2k, but not in H-2d animals. Experiments in the B10.A mouse suggested that genes within the H-2K through H-2I were influential. A more definitive map is presented of Igh-linked genes influencing anergy, suggesting that these genes are approximately 23 recombination units on the centromeric side of Igh-1 between Igh-Src and Lyb-7. Callis AH, Schrier DJ, David CS, Moore VL. Immunogenetics of BCG-induced anergy in mice. Control by Igh- and H-2-linked genes. Immunology 49(4) 609-615 Aug 1983 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6409803&dopt=Abstract 6409803 01 8-12 wks 56 84 Female except BXD RI 2-14 mm .22 0.08 0.14 0.03 0.79 0.04 0.79 0.21 0.15 0.05 .48 0.14 0.15 0.03 0.86 0.08 0.3 0.12 0.24 0.08 6/9/2003 MK Sullivn 6409803.01 Ethanol induced ataxia - initial sensitivity Blood ethanol concentrations (BECo) at loss of balance on dowel test [mg %] In previous work, we identified genetic correlations between cAMP accumulation in the cerebellum and sensitivity to the incoordinating effects of ethanol. A genetic correlation suggests that common genes underlie the phenotypes investigated. One method for provisionally identifying genes involved in a given phenotypic measure is quantitative trait locus (QTL) analysis. Using a panel of 30 BXD recombinant inbred strains of mice and the progenitors (DBA/2J and C57BL/6J), and the dowel test for ataxia, we measured the blood ethanol concentrations at the time an animal first fell from the dowel and acute functional tolerance (AFT), and investigated cAMP signaling in the cerebellum. Cyclic AMP accumulation was measured in whole-cell preparations of cerebellar minces from individual mice under basal or stimulated conditions. We conducted a genome-wide QTL analysis of the behavioral and biochemical measures with >2000 genetic markers to identify significant associations. Western blot and comparative sequencing analysis were used to compare cAMP response element binding protein (CREB) levels and protein-coding sequence, respectively. QTL analyses correlating strain means with allelic status at genetic markers identified several significant associations (p < 0.01). Analysis of variance revealed an effect of strain on behavioral and biochemical measures. There was a significant genetic correlation between initial sensitivity and basal cAMP accumulation in the cerebellum. We identified 6 provisional QTLs for initial sensitivity on four chromosomes, 6 provisional QTLs for AFT on four chromosomes, and 11 provisional QTLs for cAMP signaling on nine chromosomes. Two loci were found to overlap for measures of initial sensitivity and for cAMP signaling. Given the genetic correlation between initial sensitivity and basal cAMP accumulation, we investigated candidate genes in a QTL on chromosome 1. Comparative sequence analysis was performed, and protein levels were compared between C57 and DBA mice for Creb1. No significant differences were detected in coding sequence or protein levels for CREB. These results suggest that although ethanol sensitivity and cAMP signaling are determined by multiple genes, they may share certain genetic codetermination. Kirstein SL, Davidson KL, Ehringer MA, Sikela JM, Erwin VG, Tabakoff B. Quantitative trait loci affecting initial sensitivity and acute functional tolerance to ethanol-induced ataxia and brain cAMP signaling in BXD recombinant inbred mice J Pharmacol Exp Ther 302(3) 1238-1245 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12183685&dopt=Abstract 12183685 01 55-80 days 55 80 Male 6-18 mg% 195.33 3.1 205.91 6.0 197.28 10.6 128.9 20.6 201.40 7.3 152.49 21.5 169.13 11.1 190.51 10.8 207.85 4.2 209.95 3.0 202.57 6.0 221.38 9.3 153.89 27.8 152.64 12.2 192.77 20.7 201.79 6.6 176.98 10.0 169.36 6.6 231.42 20.9 231.88 10.5 169.98 10.7 168.04 7.4 186.86 11.5 195.65 5.0 190.36 10.7 160.71 20.1 160.26 10.4 185.8 8.9 215.79 10.6 213.37 6.5 194.48 14.35 188.26 4.2 6/11/2003 MK Sullivan 12183685.01 Ethanol induced ataxia - acute functional tolerance (AFT) on dowel test [mg %] In previous work, we identified genetic correlations between cAMP accumulation in the cerebellum and sensitivity to the incoordinating effects of ethanol. A genetic correlation suggests that common genes underlie the phenotypes investigated. One method for provisionally identifying genes involved in a given phenotypic measure is quantitative trait locus (QTL) analysis. Using a panel of 30 BXD recombinant inbred strains of mice and the progenitors (DBA/2J and C57BL/6J), and the dowel test for ataxia, we measured the blood ethanol concentrations at the time an animal first fell from the dowel and acute functional tolerance (AFT), and investigated cAMP signaling in the cerebellum. Cyclic AMP accumulation was measured in whole-cell preparations of cerebellar minces from individual mice under basal or stimulated conditions. We conducted a genome-wide QTL analysis of the behavioral and biochemical measures with >2000 genetic markers to identify significant associations. Western blot and comparative sequencing analysis were used to compare cAMP response element binding protein (CREB) levels and protein-coding sequence, respectively. QTL analyses correlating strain means with allelic status at genetic markers identified several significant associations (p < 0.01). Analysis of variance revealed an effect of strain on behavioral and biochemical measures. There was a significant genetic correlation between initial sensitivity and basal cAMP accumulation in the cerebellum. We identified 6 provisional QTLs for initial sensitivity on four chromosomes, 6 provisional QTLs for AFT on four chromosomes, and 11 provisional QTLs for cAMP signaling on nine chromosomes. Two loci were found to overlap for measures of initial sensitivity and for cAMP signaling. Given the genetic correlation between initial sensitivity and basal cAMP accumulation, we investigated candidate genes in a QTL on chromosome 1. Comparative sequence analysis was performed, and protein levels were compared between C57 and DBA mice for Creb1. No significant differences were detected in coding sequence or protein levels for CREB. These results suggest that although ethanol sensitivity and cAMP signaling are determined by multiple genes, they may share certain genetic codetermination. Kirstein SL, Davidson KL, Ehringer MA, Sikela JM, Erwin VG, Tabakoff B. Quantitative trait loci affecting initial sensitivity and acute functional tolerance to ethanol-induced ataxia and brain cAMP signaling in BXD recombinant inbred mice J Pharmacol Exp Ther 302(3) 1238-1245 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12183685&dopt=Abstract 12183685 02 55-80 days 55 80 Male 6-18 mg% 65.2 4.3. 94.1 6.5 96.8 9.0 71.0 7.3 112.9 6.9 96.5 11.4 81.1 11.2 103.7 7.2 107.0 9.5 119.3 6.9 116.0 8.4 110.6 8.4 58.4 24.4 65.7 10.5 56.2 11.0 91.3 8.7 76.7 13.2 79.1 18.8 109.5 9.0 81.2 12.0 128.3 4.1 79.2 8.4 85.0 6.4 92.3 7.6 49.3 15.9 64.4 10.2 98.3 5.3 63.5 14.0 47.2 4.6 87.0 8.3 96.9 8.6 106.9 5.9 6/11/2003 MK Sullivan 12183685.02 Ethanol induced ataxia - time for loss of balance on dowel test [min] In previous work, we identified genetic correlations between cAMP accumulation in the cerebellum and sensitivity to the incoordinating effects of ethanol. A genetic correlation suggests that common genes underlie the phenotypes investigated. One method for provisionally identifying genes involved in a given phenotypic measure is quantitative trait locus (QTL) analysis. Using a panel of 30 BXD recombinant inbred strains of mice and the progenitors (DBA/2J and C57BL/6J), and the dowel test for ataxia, we measured the blood ethanol concentrations at the time an animal first fell from the dowel and acute functional tolerance (AFT), and investigated cAMP signaling in the cerebellum. Cyclic AMP accumulation was measured in whole-cell preparations of cerebellar minces from individual mice under basal or stimulated conditions. We conducted a genome-wide QTL analysis of the behavioral and biochemical measures with >2000 genetic markers to identify significant associations. Western blot and comparative sequencing analysis were used to compare cAMP response element binding protein (CREB) levels and protein-coding sequence, respectively. QTL analyses correlating strain means with allelic status at genetic markers identified several significant associations (p < 0.01). Analysis of variance revealed an effect of strain on behavioral and biochemical measures. There was a significant genetic correlation between initial sensitivity and basal cAMP accumulation in the cerebellum. We identified 6 provisional QTLs for initial sensitivity on four chromosomes, 6 provisional QTLs for AFT on four chromosomes, and 11 provisional QTLs for cAMP signaling on nine chromosomes. Two loci were found to overlap for measures of initial sensitivity and for cAMP signaling. Given the genetic correlation between initial sensitivity and basal cAMP accumulation, we investigated candidate genes in a QTL on chromosome 1. Comparative sequence analysis was performed, and protein levels were compared between C57 and DBA mice for Creb1. No significant differences were detected in coding sequence or protein levels for CREB. These results suggest that although ethanol sensitivity and cAMP signaling are determined by multiple genes, they may share certain genetic codetermination. Kirstein SL, Davidson KL, Ehringer MA, Sikela JM, Erwin VG, Tabakoff B. Quantitative trait loci affecting initial sensitivity and acute functional tolerance to ethanol-induced ataxia and brain cAMP signaling in BXD recombinant inbred mice J Pharmacol Exp Ther 302(3) 1238-1245 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12183685&dopt=Abstract 12183685 03 55-80 days 55 80 Male 6-18 minutes 2.09 0.17 2.33 2.33 1.75 0.14 1.03 .22 2.30 0.20 1.47 0.22 2.11 0.51 1.55 0.30 1.82 0.19 2.19 0.31 2.20 0.44 1.81 0.36 1.83 0.46 1.20 0.10 1.38 0.18 2.47 0.35 2.32 0.56 1.41 0.18 3.47 0.51 3.22 0.48 1.64 0.32 1.56 0.18 2.25 0.56 1.71 0.19 2.28 0.41 1.44 0.19 1.60 0.29 1.44 0.11 1.57 0.18 1.56 0.10 2.02 0.27 1.63 0.19 6/11/2003 MK Sullivan ejc 12183685.03 Ethanol induced ataxia - time for regain of balance on dowel test (1) [min] In previous work, we identified genetic correlations between cAMP accumulation in the cerebellum and sensitivity to the incoordinating effects of ethanol. A genetic correlation suggests that common genes underlie the phenotypes investigated. One method for provisionally identifying genes involved in a given phenotypic measure is quantitative trait locus (QTL) analysis. Using a panel of 30 BXD recombinant inbred strains of mice and the progenitors (DBA/2J and C57BL/6J), and the dowel test for ataxia, we measured the blood ethanol concentrations at the time an animal first fell from the dowel and acute functional tolerance (AFT), and investigated cAMP signaling in the cerebellum. Cyclic AMP accumulation was measured in whole-cell preparations of cerebellar minces from individual mice under basal or stimulated conditions. We conducted a genome-wide QTL analysis of the behavioral and biochemical measures with >2000 genetic markers to identify significant associations. Western blot and comparative sequencing analysis were used to compare cAMP response element binding protein (CREB) levels and protein-coding sequence, respectively. QTL analyses correlating strain means with allelic status at genetic markers identified several significant associations (p < 0.01). Analysis of variance revealed an effect of strain on behavioral and biochemical measures. There was a significant genetic correlation between initial sensitivity and basal cAMP accumulation in the cerebellum. We identified 6 provisional QTLs for initial sensitivity on four chromosomes, 6 provisional QTLs for AFT on four chromosomes, and 11 provisional QTLs for cAMP signaling on nine chromosomes. Two loci were found to overlap for measures of initial sensitivity and for cAMP signaling. Given the genetic correlation between initial sensitivity and basal cAMP accumulation, we investigated candidate genes in a QTL on chromosome 1. Comparative sequence analysis was performed, and protein levels were compared between C57 and DBA mice for Creb1. No significant differences were detected in coding sequence or protein levels for CREB. These results suggest that although ethanol sensitivity and cAMP signaling are determined by multiple genes, they may share certain genetic codetermination. Kirstein SL, Davidson KL, Ehringer MA, Sikela JM, Erwin VG, Tabakoff B. Quantitative trait loci affecting initial sensitivity and acute functional tolerance to ethanol-induced ataxia and brain cAMP signaling in BXD recombinant inbred mice J Pharmacol Exp Ther 302(3) 1238-1245 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12183685&dopt=Abstract 12183685 04 55-80 days 55 80 Male 6-18 minutes 10.53 1.09 9.61 1.47 16.36 3.99 27.99 5.83 14.12 3.24 10.75 2.47 14.07 2.64 9.70 1.11 11.98 3.99 14.21 1.89 24.58 5.69 17.73 4.18 10.70 2.11 34.74 7.17 32.70 9.83 15.12 2.88 11.38 2.30 32.69 5.43 15.11 2.96 13.39 4.86 14.39 3.32 16.12 3.59 9.24 1.08 7.99 0.97 18.67 3.75 56.55 8.57 24.92 4.69 26.70 2.01 24.18 2.96 20.31 5.42 9.39 1.85 9.36 2.42 6/11/2003 MK Sullivan 12183685.04 Ethanol induced ataxia - time for regain of balance on dowel test (2) [min] In previous work, we identified genetic correlations between cAMP accumulation in the cerebellum and sensitivity to the incoordinating effects of ethanol. A genetic correlation suggests that common genes underlie the phenotypes investigated. One method for provisionally identifying genes involved in a given phenotypic measure is quantitative trait locus (QTL) analysis. Using a panel of 30 BXD recombinant inbred strains of mice and the progenitors (DBA/2J and C57BL/6J), and the dowel test for ataxia, we measured the blood ethanol concentrations at the time an animal first fell from the dowel and acute functional tolerance (AFT), and investigated cAMP signaling in the cerebellum. Cyclic AMP accumulation was measured in whole-cell preparations of cerebellar minces from individual mice under basal or stimulated conditions. We conducted a genome-wide QTL analysis of the behavioral and biochemical measures with >2000 genetic markers to identify significant associations. Western blot and comparative sequencing analysis were used to compare cAMP response element binding protein (CREB) levels and protein-coding sequence, respectively. QTL analyses correlating strain means with allelic status at genetic markers identified several significant associations (p < 0.01). Analysis of variance revealed an effect of strain on behavioral and biochemical measures. There was a significant genetic correlation between initial sensitivity and basal cAMP accumulation in the cerebellum. We identified 6 provisional QTLs for initial sensitivity on four chromosomes, 6 provisional QTLs for AFT on four chromosomes, and 11 provisional QTLs for cAMP signaling on nine chromosomes. Two loci were found to overlap for measures of initial sensitivity and for cAMP signaling. Given the genetic correlation between initial sensitivity and basal cAMP accumulation, we investigated candidate genes in a QTL on chromosome 1. Comparative sequence analysis was performed, and protein levels were compared between C57 and DBA mice for Creb1. No significant differences were detected in coding sequence or protein levels for CREB. These results suggest that although ethanol sensitivity and cAMP signaling are determined by multiple genes, they may share certain genetic codetermination. Kirstein SL, Davidson KL, Ehringer MA, Sikela JM, Erwin VG, Tabakoff B. Quantitative trait loci affecting initial sensitivity and acute functional tolerance to ethanol-induced ataxia and brain cAMP signaling in BXD recombinant inbred mice J Pharmacol Exp Ther 302(3) 1238-1245 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12183685&dopt=Abstract 12183685 05 55-80 days 55 80 Male 6-18 minutes 162.53 7.90 133.15 6.13 139.07 5.46 181.94 7.62 128.10 12.34 141.62 4.76 144.50 4.68 126.94 6.94 131.42 7.19 140.10 4.30 142 14.34 129.97 8.62 164.01 14.09 175.99 12.15 183.48 10.59 132.35 7.22 127.23 9.36 175.02 16.38 149.64 6.02 141.95 6.18 133.14 13.32 144.59 10.33 125.47 5.22 118.80 5.48 173.19 12.50 220.28 8.87 152.77 7.57 189.91 8.61 198.64 5.18 162.91 14.52 137.19 8.09 109.16 2.55 6/11/2003 MK Sullivan 12183685.05 Cerebellar cAMP accumulation - 1 micro-Molar basal In previous work, we identified genetic correlations between cAMP accumulation in the cerebellum and sensitivity to the incoordinating effects of ethanol. A genetic correlation suggests that common genes underlie the phenotypes investigated. One method for provisionally identifying genes involved in a given phenotypic measure is quantitative trait locus (QTL) analysis. Using a panel of 30 BXD recombinant inbred strains of mice and the progenitors (DBA/2J and C57BL/6J), and the dowel test for ataxia, we measured the blood ethanol concentrations at the time an animal first fell from the dowel and acute functional tolerance (AFT), and investigated cAMP signaling in the cerebellum. Cyclic AMP accumulation was measured in whole-cell preparations of cerebellar minces from individual mice under basal or stimulated conditions. We conducted a genome-wide QTL analysis of the behavioral and biochemical measures with >2000 genetic markers to identify significant associations. Western blot and comparative sequencing analysis were used to compare cAMP response element binding protein (CREB) levels and protein-coding sequence, respectively. QTL analyses correlating strain means with allelic status at genetic markers identified several significant associations (p < 0.01). Analysis of variance revealed an effect of strain on behavioral and biochemical measures. There was a significant genetic correlation between initial sensitivity and basal cAMP accumulation in the cerebellum. We identified 6 provisional QTLs for initial sensitivity on four chromosomes, 6 provisional QTLs for AFT on four chromosomes, and 11 provisional QTLs for cAMP signaling on nine chromosomes. Two loci were found to overlap for measures of initial sensitivity and for cAMP signaling. Given the genetic correlation between initial sensitivity and basal cAMP accumulation, we investigated candidate genes in a QTL on chromosome 1. Comparative sequence analysis was performed, and protein levels were compared between C57 and DBA mice for Creb1. No significant differences were detected in coding sequence or protein levels for CREB. These results suggest that although ethanol sensitivity and cAMP signaling are determined by multiple genes, they may share certain genetic codetermination. Kirstein SL, Davidson KL, Ehringer MA, Sikela JM, Erwin VG, Tabakoff B. Quantitative trait loci affecting initial sensitivity and acute functional tolerance to ethanol-induced ataxia and brain cAMP signaling in BXD recombinant inbred mice J Pharmacol Exp Ther 302(3) 1238-1245 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12183685&dopt=Abstract 12183685 06 55-80 days 55 80 Male 6-18 micro-Molar .608 0.076 1.48 0.191 1.23 0.074 1.1 .151 1.15 0.154 1.26 0.179 1.14 0.297 1.04 0.055 1.04 0.094 1.26 0.165 0.688 0.125 .994 0.074 1.87 0.141 1.15 0.147 0.972 0.228 1.38 0.166 .850 0.121 1.31 0.273 0.885 .0125 0.819 0.208 1.34 0.273 1.18 0.174 1.04 0.088 1.37 0.138 0.866 0.100 .866 0.215 1.43 0.152 1.11 0.199 .850 0.137 1.06 0.123 .868 0.114 1.21 0.172 6/11/2003 MK Sullivan 12183685.06 Cerebellar cAMP accumulation - 10 micro-Molar Forskolin In previous work, we identified genetic correlations between cAMP accumulation in the cerebellum and sensitivity to the incoordinating effects of ethanol. A genetic correlation suggests that common genes underlie the phenotypes investigated. One method for provisionally identifying genes involved in a given phenotypic measure is quantitative trait locus (QTL) analysis. Using a panel of 30 BXD recombinant inbred strains of mice and the progenitors (DBA/2J and C57BL/6J), and the dowel test for ataxia, we measured the blood ethanol concentrations at the time an animal first fell from the dowel and acute functional tolerance (AFT), and investigated cAMP signaling in the cerebellum. Cyclic AMP accumulation was measured in whole-cell preparations of cerebellar minces from individual mice under basal or stimulated conditions. We conducted a genome-wide QTL analysis of the behavioral and biochemical measures with >2000 genetic markers to identify significant associations. Western blot and comparative sequencing analysis were used to compare cAMP response element binding protein (CREB) levels and protein-coding sequence, respectively. QTL analyses correlating strain means with allelic status at genetic markers identified several significant associations (p < 0.01). Analysis of variance revealed an effect of strain on behavioral and biochemical measures. There was a significant genetic correlation between initial sensitivity and basal cAMP accumulation in the cerebellum. We identified 6 provisional QTLs for initial sensitivity on four chromosomes, 6 provisional QTLs for AFT on four chromosomes, and 11 provisional QTLs for cAMP signaling on nine chromosomes. Two loci were found to overlap for measures of initial sensitivity and for cAMP signaling. Given the genetic correlation between initial sensitivity and basal cAMP accumulation, we investigated candidate genes in a QTL on chromosome 1. Comparative sequence analysis was performed, and protein levels were compared between C57 and DBA mice for Creb1. No significant differences were detected in coding sequence or protein levels for CREB. These results suggest that although ethanol sensitivity and cAMP signaling are determined by multiple genes, they may share certain genetic codetermination. Kirstein SL, Davidson KL, Ehringer MA, Sikela JM, Erwin VG, Tabakoff B. Quantitative trait loci affecting initial sensitivity and acute functional tolerance to ethanol-induced ataxia and brain cAMP signaling in BXD recombinant inbred mice J Pharmacol Exp Ther 302(3) 1238-1245 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12183685&dopt=Abstract 12183685 07 55-80 days 55 80 Male 6-18 micro-Molar 18.5 1.02 22.8 1.55 18.6 0.43 22.3 2.9 18.9 1.62 18.3 1.26 18.6 1.53 24.5 1.47 21.7 1.04 26.2 2.40 17.4 0.63 29.0 1.28 25.2 1.09 20.9 0.90 18.4 0.52 27.7 2.20 17.1 1.36 18.9 1.15 19.4 1.22 18.7 1.83 20.9 0.74 21.6 1.89 21.7 0.99 20.1 1.81 18.5 1.33 17.0 1.13 18.6 1.62 21.3 2.98 19.2 1.31 22.8 0.93 18.8 1.16 22.5 1.78 6/11/2003 MK Sullivan 12183685.07 Cerebellar cAMP accumulation - 1 micro-Molar isoproterenol In previous work, we identified genetic correlations between cAMP accumulation in the cerebellum and sensitivity to the incoordinating effects of ethanol. A genetic correlation suggests that common genes underlie the phenotypes investigated. One method for provisionally identifying genes involved in a given phenotypic measure is quantitative trait locus (QTL) analysis. Using a panel of 30 BXD recombinant inbred strains of mice and the progenitors (DBA/2J and C57BL/6J), and the dowel test for ataxia, we measured the blood ethanol concentrations at the time an animal first fell from the dowel and acute functional tolerance (AFT), and investigated cAMP signaling in the cerebellum. Cyclic AMP accumulation was measured in whole-cell preparations of cerebellar minces from individual mice under basal or stimulated conditions. We conducted a genome-wide QTL analysis of the behavioral and biochemical measures with >2000 genetic markers to identify significant associations. Western blot and comparative sequencing analysis were used to compare cAMP response element binding protein (CREB) levels and protein-coding sequence, respectively. QTL analyses correlating strain means with allelic status at genetic markers identified several significant associations (p < 0.01). Analysis of variance revealed an effect of strain on behavioral and biochemical measures. There was a significant genetic correlation between initial sensitivity and basal cAMP accumulation in the cerebellum. We identified 6 provisional QTLs for initial sensitivity on four chromosomes, 6 provisional QTLs for AFT on four chromosomes, and 11 provisional QTLs for cAMP signaling on nine chromosomes. Two loci were found to overlap for measures of initial sensitivity and for cAMP signaling. Given the genetic correlation between initial sensitivity and basal cAMP accumulation, we investigated candidate genes in a QTL on chromosome 1. Comparative sequence analysis was performed, and protein levels were compared between C57 and DBA mice for Creb1. No significant differences were detected in coding sequence or protein levels for CREB. These results suggest that although ethanol sensitivity and cAMP signaling are determined by multiple genes, they may share certain genetic codetermination. Kirstein SL, Davidson KL, Ehringer MA, Sikela JM, Erwin VG, Tabakoff B. Quantitative trait loci affecting initial sensitivity and acute functional tolerance to ethanol-induced ataxia and brain cAMP signaling in BXD recombinant inbred mice J Pharmacol Exp Ther 302(3) 1238-1245 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12183685&dopt=Abstract 12183685 08 55-80 days 55 80 Male 6-18 micro-Molar 3.37 0.29 6.00 0.40 4.77 0.21 3.68 0.42 4.23 0.44 4.24 0.69 4.31 0.69 6.37 0.11 5.05 0.25 5.17 0.26 4.29 0.37 5.15 0.35 9.38 0.47 5.19 0.29 4.27 0.38 5.14 0.31 4.83 0.34 5.63 0.29 4.81 0.38 5.88 0.71 5.41 0.32 4.34 0.25 4.62 0.36 5.51 0.55 3.81 0.51 4.10 0.42 4.85 0.40 4.80 0.25 5.15 0.38 5.23 0.23 4.27 0.31 5.24 0.32 6/11/2003 MK Sullivan 12183685.08 Dopamine transporter expression DAT Bmax [pmol/mg] Binding of 3beta-(4-iodophenyl) tropane-2beta-carboxylic acid methyl ester ([125I]RTI-55) to the dopamine transporter (DAT) in neostriatum from C57BL/6J, DBA/2J, and 21 BXD recombinant inbred (RI) mouse strains indicated highly significant strain differences in DAT density (Bmax) but no significant differences in affinity (Kd) for this radioligand. Strain mean Bmax values and the known genomic locations of 1390 marker loci were used to carry out a genome-wide search for quantitative trait loci (QTLs), which are chromosomal sites containing genes that influence DAT expression. This search revealed an unusually large effect QTL on chromosome 19 in the region of the proopiomelanocortin pseudogene Pomc-ps1 (8-11 cM), homologous to regions of human chromosomes 9q21 and 11q12-13. This QTL (logarithm of the odds 4.7, df = 1, p = 3 x 10(-6)) by conservative estimates accounts for just over half of the genetic variation in DAT binding site density. The QTL is not the DAT gene itself (Dat1, chromosome 13), but a powerful modulator of DAT expression in neostriatum. Furthermore, DAT expression levels in 20 of the BXD RI strains and the chromosome 19 QTL were correlated with cocaine and methamphetamine-induced locomotor activation and thermic responses (hypo- or hyperthermia), but were not correlated with behaviors related to sensitization, reward, voluntary consumption, stereotypy, or seizures induced by these two psychostimulant drugs. The results suggest that there is a gene(s) on proximal chromosome 19 that strongly influences DAT expression in neostriatum and may influence psychostimulant-induced activity and thermal responses. Janowsky A, Mah C, Johnson RA, Cunningham CL, Phillips TJ, Crabbe JC, Eshleman AJ, Belknap JK. Mapping genes that regulate density of dopamine transporters and correlated behaviors in recombinant inbred mice. J Pharmacol Exp Ther 298(2) 634-643 Aug 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11454925&dopt=Abstract 11454925 01 50-60 days 50 60 Male 3-11 pmol/mg 2.28 0.2 3.37 0.7 2.15 0.3 1.96 0.2 3.95 1.2 5.26 0.6 3.22 0.5 3.86 0.6 2.52 0.8 1.68 0.4 3.33 1.4 5.29 1.1 2.32 0.2 1.65 0.1 3.22 0.5 4.85 0.6 2.91 0.5 4.20 0.4 2.45 0.3 3.11 0.3 3.38 0.2 2.83 0.2 1.93 0.2 6/10/2003 MK Sullivan 11454925.01 Total hippocampus Volume - uncorrected for sex age body and brain weight We recently mapped two quantitative trait loci that have widespread effects on hippocampal architecture in mouse: Hipp1a and Hipp5a. We also noted remarkable strain differences in the relative sizes of different hippocampal regions. Estimated heritable variation for these differences was 42% in hippocampus proper, 40% in dentate gyrus, 31% in granule cell layer and 18% in pyramidal cell layer. Region size varied at least 50% from largest to smallest measurement. Here we have utilized these differences to identify loci with effects on the dentate gyrus, granule cell layer, hippocampus proper, and pyramidal cell layer. Our sample consists of C57BL/6J and DBA/2J and 32 BXD recombinant inbred strains. Volumetric data were corrected for shrinkage and for differences in brain weight. We identified significant loci on chromosomes (Chr) 6, 13 and 15, and significant interaction locus on proximal Chr 11. A suggestive distal Chr 1 locus overlaps with Hipp1a. HipV13a (Chr 13, 42-78 Mb) has an additive effect of 0.56 mm3 (12.1%) on dentate gyrus volume, while GrV6a (Chr 6, 29-65 Mb) has additive effects of 0.14 mm3 (16.0%) on the volume of the granule cell layer. HipV13a also interacts with DGVi11a, a locus on proximal Chr 11 that operates exclusively through its epistatic effect on HipV13a and has no independent main effect. HipV15a (Chr 15, 0-51 Mb) has an additive effect of 1.76 mm3 (9.0%) on the volume of the hippocampus proper. We used WebQTL, a recently described web-based tool, to examine genetic correlation of gene expresssion with hippocampal volume. We identified a number of genes that map within the QTL intervals and have highly correlated expression patterns. Using WebQTL's extensive database of published BXD phenotypes, we also detected a strong and potentially biologically meaningful correlation between hippocampal volume and acoustic startle response. Peirce JL, Chesler EJ, Williams RW, Lu L Genetic architecture of the mouse hippocampus: Identification of gene loci with selective regional effects Genes Brain Behav 2 238-252 2003 .91 38-359 days 38 359 MF mm3 28.0 0.7 24.3 0.5 28.4 0.8 22.4 0.5 26.7 0.9 28.0 1.2 22.5 0.5 25.7 1.1 25.3 0.7 23.7 0.7 24.6 0.7 27 0.7 22.7 0.6 24.5 0.5 27.4 0.9 21.7 0.7 26.8 0.4 23.6 0.8 23.6 0.5 22.5 1.1 20.4 0.8 21.3 0.6 20.4 0.8 18.9 0.7 23.7 0.7 26.6 0.9 21.6 0.6 20.5 0.7 23.0 0.5 23.6 0.7 24.1 0.5 22.2 0.7 27.4 1.0 25.4 0.6 7/25/2003 MK Sullivan .0091 Hippocampus proper volume - uncorrected for sex age body and brain weight [mm3] We recently mapped two quantitative trait loci that have widespread effects on hippocampal architecture in mouse: Hipp1a and Hipp5a. We also noted remarkable strain differences in the relative sizes of different hippocampal regions. Estimated heritable variation for these differences was 42% in hippocampus proper, 40% in dentate gyrus, 31% in granule cell layer and 18% in pyramidal cell layer. Region size varied at least 50% from largest to smallest measurement. Here we have utilized these differences to identify loci with effects on the dentate gyrus, granule cell layer, hippocampus proper, and pyramidal cell layer. Our sample consists of C57BL/6J and DBA/2J and 32 BXD recombinant inbred strains. Volumetric data were corrected for shrinkage and for differences in brain weight. We identified significant loci on chromosomes (Chr) 6, 13 and 15, and significant interaction locus on proximal Chr 11. A suggestive distal Chr 1 locus overlaps with Hipp1a. HipV13a (Chr 13, 42-78 Mb) has an additive effect of 0.56 mm3 (12.1%) on dentate gyrus volume, while GrV6a (Chr 6, 29-65 Mb) has additive effects of 0.14 mm3 (16.0%) on the volume of the granule cell layer. HipV13a also interacts with DGVi11a, a locus on proximal Chr 11 that operates exclusively through its epistatic effect on HipV13a and has no independent main effect. HipV15a (Chr 15, 0-51 Mb) has an additive effect of 1.76 mm3 (9.0%) on the volume of the hippocampus proper. We used WebQTL, a recently described web-based tool, to examine genetic correlation of gene expresssion with hippocampal volume. We identified a number of genes that map within the QTL intervals and have highly correlated expression patterns. Using WebQTL's extensive database of published BXD phenotypes, we also detected a strong and potentially biologically meaningful correlation between hippocampal volume and acoustic startle response. Peirce JL, Chesler EJ, Williams RW, Lu L Genetic architecture of the mouse hippocampus: Identification of gene loci with selective regional effects Genes Brain Behav 2 238-252 2003 .92 38-359 days 38 359 MF mm3 22.4 0.6 19.7 0.4 23.0 0.6 18.7 0.4 21.4 0.7 22.3 1.0 18.1 0.4 21.3 0.8 20.5 0.6 19.2 0.6 19.7 0.6 21.9 0.5 18.9 0.7 19.6 0.4 22.2 0.6 17.6 0.7 21.3 0.3 19.2 0.7 19.3 0.4 18.2 0.8 16.7 0.7 17.1 0.5 16.3 0.7 15.2 0.5 19.3 0.5 21.6 0.8 17.5 0.5 16.8 0.5 18.5 0.3 19.3 0.5 19.8 0.4 17.9 0.6 22.2 0.8 20.2 0.4 7/25/2003 MK Sullivan .0092 Hippocampus pyramidal cell layer volume - uncorrected for sex age body and brain weight [mm3] We recently mapped two quantitative trait loci that have widespread effects on hippocampal architecture in mouse: Hipp1a and Hipp5a. We also noted remarkable strain differences in the relative sizes of different hippocampal regions. Estimated heritable variation for these differences was 42% in hippocampus proper, 40% in dentate gyrus, 31% in granule cell layer and 18% in pyramidal cell layer. Region size varied at least 50% from largest to smallest measurement. Here we have utilized these differences to identify loci with effects on the dentate gyrus, granule cell layer, hippocampus proper, and pyramidal cell layer. Our sample consists of C57BL/6J and DBA/2J and 32 BXD recombinant inbred strains. Volumetric data were corrected for shrinkage and for differences in brain weight. We identified significant loci on chromosomes (Chr) 6, 13 and 15, and significant interaction locus on proximal Chr 11. A suggestive distal Chr 1 locus overlaps with Hipp1a. HipV13a (Chr 13, 42-78 Mb) has an additive effect of 0.56 mm3 (12.1%) on dentate gyrus volume, while GrV6a (Chr 6, 29-65 Mb) has additive effects of 0.14 mm3 (16.0%) on the volume of the granule cell layer. HipV13a also interacts with DGVi11a, a locus on proximal Chr 11 that operates exclusively through its epistatic effect on HipV13a and has no independent main effect. HipV15a (Chr 15, 0-51 Mb) has an additive effect of 1.76 mm3 (9.0%) on the volume of the hippocampus proper. We used WebQTL, a recently described web-based tool, to examine genetic correlation of gene expresssion with hippocampal volume. We identified a number of genes that map within the QTL intervals and have highly correlated expression patterns. Using WebQTL's extensive database of published BXD phenotypes, we also detected a strong and potentially biologically meaningful correlation between hippocampal volume and acoustic startle response. Peirce JL, Chesler EJ, Williams RW, Lu L Genetic architecture of the mouse hippocampus: Identification of gene loci with selective regional effects Genes Brain BehavGenes Brain Behav 2 238-252 2003 .93 38-359 days 38 359 MF mm3 1.41 0.11 1.18 0.06 1.68 0.09 1.42 0.04 1.60 0.12 1.69 0.10 1.38 0.04 1.60 0.11 1.58 0.09 1.46 0.07 1.61 0.14 1.58 0.09 1.37 0.03 1.55 0.07 1.74 0.15 1.16 0.08 1.49 0.07 1.44 0.11 1.47 0.10 1.43 0.08 1.336 0.11 1.33 0.12 1.15 0.06 1.24 0.07 1.43 0.11 1.48 0.06 1.39 0.08 1.38 0.06 1.38 0.04 1.46 0.06 1.64 0.11 1.23 0.07 1.65 0.14 1.48 0.07 7/25/2003 MK Sullivan .0093 Hippocampus granule cell layer volume - uncorrected for sex age body and brain weight [mm3] We recently mapped two quantitative trait loci that have widespread effects on hippocampal architecture in mouse: Hipp1a and Hipp5a. We also noted remarkable strain differences in the relative sizes of different hippocampal regions. Estimated heritable variation for these differences was 42% in hippocampus proper, 40% in dentate gyrus, 31% in granule cell layer and 18% in pyramidal cell layer. Region size varied at least 50% from largest to smallest measurement. Here we have utilized these differences to identify loci with effects on the dentate gyrus, granule cell layer, hippocampus proper, and pyramidal cell layer. Our sample consists of C57BL/6J and DBA/2J and 32 BXD recombinant inbred strains. Volumetric data were corrected for shrinkage and for differences in brain weight. We identified significant loci on chromosomes (Chr) 6, 13 and 15, and significant interaction locus on proximal Chr 11. A suggestive distal Chr 1 locus overlaps with Hipp1a. HipV13a (Chr 13, 42-78 Mb) has an additive effect of 0.56 mm3 (12.1%) on dentate gyrus volume, while GrV6a (Chr 6, 29-65 Mb) has additive effects of 0.14 mm3 (16.0%) on the volume of the granule cell layer. HipV13a also interacts with DGVi11a, a locus on proximal Chr 11 that operates exclusively through its epistatic effect on HipV13a and has no independent main effect. HipV15a (Chr 15, 0-51 Mb) has an additive effect of 1.76 mm3 (9.0%) on the volume of the hippocampus proper. We used WebQTL, a recently described web-based tool, to examine genetic correlation of gene expresssion with hippocampal volume. We identified a number of genes that map within the QTL intervals and have highly correlated expression patterns. Using WebQTL's extensive database of published BXD phenotypes, we also detected a strong and potentially biologically meaningful correlation between hippocampal volume and acoustic startle response. Peirce JL, Chesler EJ, Williams RW, Lu L Genetic architecture of the mouse hippocampus: Identification of gene loci with selective regional effects Genes Brain Behav 2 238-252 2003 .94 38-359 days 38 359 MF mm3 1.09 0.05 0.75 0.02 1.06 0.03 0.75 0.03 0.99 0.07 1.13 0.05 0.85 0.03 1.00 0.12 0.87 0.04 0.95 0.05 1.10 0.06 0.85 0.05 0.50 0.03 0.87 0.02 0.97 0.04 0.75 0.04 1.01 0.06 0.80 0.04 0.84 0.05 0.94 0.08 0.75 0.08 0.84 0.06 0.69 0.05 0.79 0.06 0.78 0.07 0.91 0.04 0.74 0.03 0.66 0.04 0.85 0.04 0.76 0.05 0.84 0.03 0.96 0.04 1.04 0.09 1.05 0.05 7/25/2003 MK Sullivan .0094 Hippocampus dentate gyrus volume - uncorrected for sex age body and brain weight [mm3] We recently mapped two quantitative trait loci that have widespread effects on hippocampal architecture in mouse: Hipp1a and Hipp5a. We also noted remarkable strain differences in the relative sizes of different hippocampal regions. Estimated heritable variation for these differences was 42% in hippocampus proper, 40% in dentate gyrus, 31% in granule cell layer and 18% in pyramidal cell layer. Region size varied at least 50% from largest to smallest measurement. Here we have utilized these differences to identify loci with effects on the dentate gyrus, granule cell layer, hippocampus proper, and pyramidal cell layer. Our sample consists of C57BL/6J and DBA/2J and 32 BXD recombinant inbred strains. Volumetric data were corrected for shrinkage and for differences in brain weight. We identified significant loci on chromosomes (Chr) 6, 13 and 15, and significant interaction locus on proximal Chr 11. A suggestive distal Chr 1 locus overlaps with Hipp1a. HipV13a (Chr 13, 42-78 Mb) has an additive effect of 0.56 mm3 (12.1%) on dentate gyrus volume, while GrV6a (Chr 6, 29-65 Mb) has additive effects of 0.14 mm3 (16.0%) on the volume of the granule cell layer. HipV13a also interacts with DGVi11a, a locus on proximal Chr 11 that operates exclusively through its epistatic effect on HipV13a and has no independent main effect. HipV15a (Chr 15, 0-51 Mb) has an additive effect of 1.76 mm3 (9.0%) on the volume of the hippocampus proper. We used WebQTL, a recently described web-based tool, to examine genetic correlation of gene expresssion with hippocampal volume. We identified a number of genes that map within the QTL intervals and have highly correlated expression patterns. Using WebQTL's extensive database of published BXD phenotypes, we also detected a strong and potentially biologically meaningful correlation between hippocampal volume and acoustic startle response. Peirce JL, Chesler EJ, Williams RW, Lu L Genetic architecture of the mouse hippocampus: Identification of gene loci with selective regional effects Genes Brain Behav 2 238-252 2003 .95 38-359 days 38 359 MF mm3 5.63 0.14 4.55 0.13 5.44 0.21 3.74 0.12 5.31 0.22 5.71 0.16 4.39 0.06 4.45 0.30 4.72 0.18 4.52 0.11 4.95 0.18 5.17 0.24 3.86 0.21 4.86 0.14 5.25 0.31 4.05 0.07 5.47 0.18 4.35 0.17 4.39 0.11 4.3 0.25 3.7 0.19 4.21 0.11 4.07 0.15 3.74 0.23 4.37 0.16 4.94 0.19 4.13 0.12 3.69 0.14 4.55 0.23 4.30 0.17 4.38 0.09 4.23 0.09 5.19 0.30 5.20 0.22 7/25/2003 MK Sullivan .0095 Body Weight [g] We recently mapped two quantitative trait loci that have widespread effects on hippocampal architecture in mouse: Hipp1a and Hipp5a. We also noted remarkable strain differences in the relative sizes of different hippocampal regions. Estimated heritable variation for these differences was 42% in hippocampus proper, 40% in dentate gyrus, 31% in granule cell layer and 18% in pyramidal cell layer. Region size varied at least 50% from largest to smallest measurement. Here we have utilized these differences to identify loci with effects on the dentate gyrus, granule cell layer, hippocampus proper, and pyramidal cell layer. Our sample consists of C57BL/6J and DBA/2J and 32 BXD recombinant inbred strains. Volumetric data were corrected for shrinkage and for differences in brain weight. We identified significant loci on chromosomes (Chr) 6, 13 and 15, and significant interaction locus on proximal Chr 11. A suggestive distal Chr 1 locus overlaps with Hipp1a. HipV13a (Chr 13, 42-78 Mb) has an additive effect of 0.56 mm3 (12.1%) on dentate gyrus volume, while GrV6a (Chr 6, 29-65 Mb) has additive effects of 0.14 mm3 (16.0%) on the volume of the granule cell layer. HipV13a also interacts with DGVi11a, a locus on proximal Chr 11 that operates exclusively through its epistatic effect on HipV13a and has no independent main effect. HipV15a (Chr 15, 0-51 Mb) has an additive effect of 1.76 mm3 (9.0%) on the volume of the hippocampus proper. We used WebQTL, a recently described web-based tool, to examine genetic correlation of gene expresssion with hippocampal volume. We identified a number of genes that map within the QTL intervals and have highly correlated expression patterns. Using WebQTL's extensive database of published BXD phenotypes, we also detected a strong and potentially biologically meaningful correlation between hippocampal volume and acoustic startle response. Peirce JL, Chesler EJ, Williams RW, Lu L Genetic architecture of the mouse hippocampus: Identification of gene loci with selective regional effects Genes Brain Behav 2 238-252 20032003 .96 38-359 days 38 359 MF g 28.6 2.2 25.9 1.3 20.7 1.2 21.9 1.5 28.3 0.6 24.3 1.5 23.9 1.8 19.1 1.9 23.2 1.4 23.1 1.3 23.2 1.4 28.7 0.7 23.5 1.3 22.0 1.9 21.2 1.4 21.7 1.6 25.5 2.4 18.3 1.4 25.8 1.9 15.7 1.3 23.5 2.3 21.3 1.3 16.9 1.5 18.2 1.5 22.0 3.2 25.3 1.8 20.5 1.1 23.5 0.5 19.9 0.9 19.7 2.2 20.2 1.4 18.5 1.1 18.5 1.3 21.2 0.8 7/25/2003 MK Sullivan .0096 Brain Weight [mg] We recently mapped two quantitative trait loci that have widespread effects on hippocampal architecture in mouse: Hipp1a and Hipp5a. We also noted remarkable strain differences in the relative sizes of different hippocampal regions. Estimated heritable variation for these differences was 42% in hippocampus proper, 40% in dentate gyrus, 31% in granule cell layer and 18% in pyramidal cell layer. Region size varied at least 50% from largest to smallest measurement. Here we have utilized these differences to identify loci with effects on the dentate gyrus, granule cell layer, hippocampus proper, and pyramidal cell layer. Our sample consists of C57BL/6J and DBA/2J and 32 BXD recombinant inbred strains. Volumetric data were corrected for shrinkage and for differences in brain weight. We identified significant loci on chromosomes (Chr) 6, 13 and 15, and significant interaction locus on proximal Chr 11. A suggestive distal Chr 1 locus overlaps with Hipp1a. HipV13a (Chr 13, 42-78 Mb) has an additive effect of 0.56 mm3 (12.1%) on dentate gyrus volume, while GrV6a (Chr 6, 29-65 Mb) has additive effects of 0.14 mm3 (16.0%) on the volume of the granule cell layer. HipV13a also interacts with DGVi11a, a locus on proximal Chr 11 that operates exclusively through its epistatic effect on HipV13a and has no independent main effect. HipV15a (Chr 15, 0-51 Mb) has an additive effect of 1.76 mm3 (9.0%) on the volume of the hippocampus proper. We used WebQTL, a recently described web-based tool, to examine genetic correlation of gene expresssion with hippocampal volume. We identified a number of genes that map within the QTL intervals and have highly correlated expression patterns. Using WebQTL's extensive database of published BXD phenotypes, we also detected a strong and potentially biologically meaningful correlation between hippocampal volume and acoustic startle response. Peirce JL, Chesler EJ, Williams RW, Lu L Genetic architecture of the mouse hippocampus: Identification of gene loci with selective regional effects Genes Brain Behav 2 238-252 2003 .97 38-359 days 38 359 MF mg 477.4 4.8 401.4 5.6 458.0 7.3 426.6 5.9 544.9 9.4 424.8 10.4 434.9 2.7 429.0 9.7 438.4 8.5 417.7 4.0 44.4 8.6 453.1 4.4 435.6 11.6 418.0 5.0 425.4 6.7 392.2 3.2 458.2 6..5 414.1 5.2 408.1 3.9 391.9 9.8 358.0 4.9 395.4 4.7 371.7 9.2 361.2 11.4 402.2 11.4 446.0 6.6 429.2 6.4 413.5 5.7 410.0 5.8 409.3 7.4 415.6 5.9 396.6 7.8 429.7 4.7 454.5 5.4 7/25/2003 MK Sullivan .0097 Relative frequency of audiogenic seizure [%] Mice of some inbred strains, such as 21-day-old DBA/2J mice, have generalized convulsions when exposed to intense auditory stimulation. Analysis of susceptibility to audiogenic seizures in BXD recombinant inbred strains has demonstrated the influence of at least three loci. One locus, Asp-1, is located on chromosome 12 between Ah and D12Nyu1; another locus, Asp-2, is on chromosome 4, tightly linked to b. Here we report evidence that Asp-2 is located within an 8-centimorgan segment distal to b and that Asp-3 is linked to Mtv-1 on chromosome 7. We also present evidence that these three loci account for most of the heritable variation in susceptibility to audiogenic seizures in crosses of DBA/2J and C57BL/6J mice and that susceptibility to audiogenic seizures is influenced by genomic imprinting. Thus, genomic imprinting may complicate linkage and mapping studies and should be considered in analyses of complex modes of inheritance. Neumann PE, Collins RL Genetic dissection of susceptibility to audiogenic seizures in inbred mice. Proc Natl Acad Sci 88(12) 5408-5412 Jun 1991 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2052619&dopt=Abstract 2052619 01 21 days 21 MF % 2 91 0 92 68 0 23 93 21 0 0 8 94 0 0 35 92 40 22 0 29 22 0 0 90 7/1/2003 MK Sullivan MK Sullivan 2052619.01 Ethanol metabolism-2 g/kg [mg/ml/hr] BACKGROUND: Genetic factors are well known to play an important role in determining individual differences in the metabolism of ethanol (EtOH), and several specific polymorphic loci have been identified that significantly contribute to the variability of EtOH metabolism in humans. However, these variant genes are either alcohol or aldehyde dehydrogenases, and the identification of new gene products that contribute to variation in alcohol metabolism would be useful. METHODS: To identify quantitative trait loci (QTLs), we correlated variation in polymorphic markers with blood EtOH concentration and the rate of EtOH metabolism (beta) in C57BL/6J and DBA/2J strains and in 25 of their recombinant inbred strains after 2 and 3 g/kg of EtOH intraperitoneally. RESULTS: A QTL associated with beta values for both doses was definitively mapped to the proximal region of chromosome 17, syntenic with human chromosome 6q25-27. Seven to 12 chromosomal regions were provisionally identified for each phenotype; several were associated with 2 or more phenotypes. Each QTL suggests the location of a gene or genes affecting EtOH pharmacokinetics. Candidate genes suggested by these analyses included several whose gene products are known to be induced by EtOH (e.g., superoxide dismutase, glutathione transferase, and cytochrome P450 2E1), as well as several whose gene products have signaling functions likely to contribute to this induction. CONCLUSIONS: These studies provide evidence for the existence of genes affecting EtOH metabolism in multiple chromosomal regions. Future studies will be required to identify the chromosome 17 gene product. Use of other genetic populations, such as B6D2F2 crosses, will be required to determine which of the provisional loci represent true and which represent false-positive associations. Grisel JE, Metten P, Wenger CD, Merrill CM, Crabbe JC Mapping of quantitative trait loci underlying ethanol metabolism in BXD recombinant inbred mouse strains. Alcohol Clin Exp Res 26(5) 610-616 May 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12045468&dopt=Abstract 12045468 01 7-16 wks 49 112 Male 10-28 mg/ml/hr -0.72 0.02 -0.92 0.01 -0.79 0.02 -0.8 0.02 -0.68 0.10 -0.64 0.02 -0.82 0.07 -0.80 0.02 -0.87 0.04 -0.64 0.01 -0.83 0.01 -0.95 0.04 -0.97 0.01 -0.76 0.04 -0.73 0.04 -0.82 0.04 -0.84 0.04 -0.84 0.01 -0.97 0.04 -0.92 0.02 -0.77 0.01 -0.96 0.01 -0.77 0.02 -1.00 0.02 -0.63 0.04 -0.68 0.04 -0.73 0.05 6/5/2003 MK Sullivan 12045468.01 Ethanol metabolism-3 g/kg [mg/ml/hr] BACKGROUND: Genetic factors are well known to play an important role in determining individual differences in the metabolism of ethanol (EtOH), and several specific polymorphic loci have been identified that significantly contribute to the variability of EtOH metabolism in humans. However, these variant genes are either alcohol or aldehyde dehydrogenases, and the identification of new gene products that contribute to variation in alcohol metabolism would be useful. METHODS: To identify quantitative trait loci (QTLs), we correlated variation in polymorphic markers with blood EtOH concentration and the rate of EtOH metabolism (beta) in C57BL/6J and DBA/2J strains and in 25 of their recombinant inbred strains after 2 and 3 g/kg of EtOH intraperitoneally. RESULTS: A QTL associated with beta values for both doses was definitively mapped to the proximal region of chromosome 17, syntenic with human chromosome 6q25-27. Seven to 12 chromosomal regions were provisionally identified for each phenotype; several were associated with 2 or more phenotypes. Each QTL suggests the location of a gene or genes affecting EtOH pharmacokinetics. Candidate genes suggested by these analyses included several whose gene products are known to be induced by EtOH (e.g., superoxide dismutase, glutathione transferase, and cytochrome P450 2E1), as well as several whose gene products have signaling functions likely to contribute to this induction. CONCLUSIONS: These studies provide evidence for the existence of genes affecting EtOH metabolism in multiple chromosomal regions. Future studies will be required to identify the chromosome 17 gene product. Use of other genetic populations, such as B6D2F2 crosses, will be required to determine which of the provisional loci represent true and which represent false-positive associations. Grisel JE, Metten P, Wenger CD, Merrill CM, Crabbe JC Mapping of quantitative trait loci underlying ethanol metabolism in BXD recombinant inbred mouse strains. Alcohol Clin Exp Res 26(5) 610-616 May 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12045468&dopt=Abstract 12045468 02 7-16 wks 49 112 Male 10-28 mg/ml/hr -0.69 0.02 -0.83 0.00 -0.71 0.02 -0.72 0.05 -0.71 0.02 -0.69 0.01 -0.88 0.02 -0.85 0.04 -0.8 0.03 -0.51 0.02 -0.74 0.04 -0.85 0.01 -0.83 0.02 -0.67 0.04 -0.72 0.02 -0.73 0.04 -0.85 0.02 -0.75 0.04 -0.88 0.04 -0.86 0.02 -0.74 0.04 -0.92 0.03 -0.76 0.02 -0.83 0.01 -0.59 0.02 -0.62 0.01 -0.65 0.02 6/5/2003 MK Sullivan 12045468.02 Blood Ethanol Concentration 60 minutes after 2 g/kg [mg/ml] BACKGROUND: Genetic factors are well known to play an important role in determining individual differences in the metabolism of ethanol (EtOH), and several specific polymorphic loci have been identified that significantly contribute to the variability of EtOH metabolism in humans. However, these variant genes are either alcohol or aldehyde dehydrogenases, and the identification of new gene products that contribute to variation in alcohol metabolism would be useful. METHODS: To identify quantitative trait loci (QTLs), we correlated variation in polymorphic markers with blood EtOH concentration and the rate of EtOH metabolism (beta) in C57BL/6J and DBA/2J strains and in 25 of their recombinant inbred strains after 2 and 3 g/kg of EtOH intraperitoneally. RESULTS: A QTL associated with beta values for both doses was definitively mapped to the proximal region of chromosome 17, syntenic with human chromosome 6q25-27. Seven to 12 chromosomal regions were provisionally identified for each phenotype; several were associated with 2 or more phenotypes. Each QTL suggests the location of a gene or genes affecting EtOH pharmacokinetics. Candidate genes suggested by these analyses included several whose gene products are known to be induced by EtOH (e.g., superoxide dismutase, glutathione transferase, and cytochrome P450 2E1), as well as several whose gene products have signaling functions likely to contribute to this induction. CONCLUSIONS: These studies provide evidence for the existence of genes affecting EtOH metabolism in multiple chromosomal regions. Future studies will be required to identify the chromosome 17 gene product. Use of other genetic populations, such as B6D2F2 crosses, will be required to determine which of the provisional loci represent true and which represent false-positive associations. Grisel JE, Metten P, Wenger CD, Merrill CM, Crabbe JC Mapping of quantitative trait loci underlying ethanol metabolism in BXD recombinant inbred mouse strains. Alcohol Clin Exp Res 26(5) 610-616 May 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12045468&dopt=Abstract 12045468 03 7-16 wks 49 112 Male 10-28 mg/ml 1.930 0.043 2.249 0.083 1.859 0.059 1.861 0.054 1.848 0.040 1.654 0.050 2.113 0.097 2.228 0.086 1.907 0.093 1.447 0.019 2.002 0.072 2.010 0.063 1.927 0.076 2.089 0.085 1.767 0.070 1.749 0.077 1.833 0.046 1.861 0.062 1.969 0.048 2.337 0.065 1.794 0.053 1.996 0.117 1.935 0.049 1.864 0.063 1.627 0.065 1.560 0.050 1.615 0.059 6/5/2003 MK Sullivan 12045468.03 Blood Ethanol Concentration 60 minutes after 3 g/kg [mg/ml] BACKGROUND: Genetic factors are well known to play an important role in determining individual differences in the metabolism of ethanol (EtOH), and several specific polymorphic loci have been identified that significantly contribute to the variability of EtOH metabolism in humans. However, these variant genes are either alcohol or aldehyde dehydrogenases, and the identification of new gene products that contribute to variation in alcohol metabolism would be useful. METHODS: To identify quantitative trait loci (QTLs), we correlated variation in polymorphic markers with blood EtOH concentration and the rate of EtOH metabolism (beta) in C57BL/6J and DBA/2J strains and in 25 of their recombinant inbred strains after 2 and 3 g/kg of EtOH intraperitoneally. RESULTS: A QTL associated with beta values for both doses was definitively mapped to the proximal region of chromosome 17, syntenic with human chromosome 6q25-27. Seven to 12 chromosomal regions were provisionally identified for each phenotype; several were associated with 2 or more phenotypes. Each QTL suggests the location of a gene or genes affecting EtOH pharmacokinetics. Candidate genes suggested by these analyses included several whose gene products are known to be induced by EtOH (e.g., superoxide dismutase, glutathione transferase, and cytochrome P450 2E1), as well as several whose gene products have signaling functions likely to contribute to this induction. CONCLUSIONS: These studies provide evidence for the existence of genes affecting EtOH metabolism in multiple chromosomal regions. Future studies will be required to identify the chromosome 17 gene product. Use of other genetic populations, such as B6D2F2 crosses, will be required to determine which of the provisional loci represent true and which represent false-positive associations. Grisel JE, Metten P, Wenger CD, Merrill CM, Crabbe JC Mapping of quantitative trait loci underlying ethanol metabolism in BXD recombinant inbred mouse strains. Alcohol Clin Exp Res 26(5) 610-616 May 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12045468&dopt=Abstract 12045468 04 7-16 wks 49 112 Male 10-28 mg/ml 3.145 0.094 3.464 0.108 2.434 0.123 2.847 0.110 2.951 0.089 2.895 0.092 3.284 0.057 3.562 0.120 2.894 0.119 2.606 0.058 3.570 0.071 3.076 0.078 2.951 0.042 3.326 0.071 2.903 0.063 3.185 0.134 3.084 0.045 2.702 0.076 2.975 0.068 3.652 0.110 3.826 0.135 3.544 0.123 3.198 0.071 2.956 0.063 2.828 0.084 2.395 0.115 2.325 0.077 6/5/2003 MK Sullivan 12045468.04 Total Hippocampus granule cell number [number of cells] A number of reports have indicated that adult neurogenesis might be involved in hippocampal function. While increases in adult neurogenesis are paralleled by improvements on learning tasks and learning itself can promote the survival of newly generated neurons in the hippocampus, a causal link between learning processes and adult hippocampal neurogenesis is difficult to prove. Here, we addressed the related question of whether the baseline level of adult neurogenesis is predictive of performance on the water maze task as a test of hippocampal function. We used ten strains of recombinant inbred mice, based on C57BL/6, which are good learners and show high baseline levels of neurogenesis, and DBA/2, which are known to be poor learners and which exhibit low levels of adult neurogenesis. Two of these strains, BXD-2 and BXD-8, showed a 26-fold difference in the number of newly generated neurons per hippocampus. Over all strains, including the parental strains, there was a significant correlation between the number of new neurons generated in the dentate gyrus and parameters describing the acquisition of the water maze task (slope of the learning curves). Similar results were seen when the parental strains were not included in the analysis. There was no correlation between adult hippocampal neurogenesis and probe trial performance, performance on the rotarod, overall locomotor activity, and baseline serum corticosterone levels. This result supports the hypothesis that adult neurogenesis is involved in specific aspects of hippocampal function, particularly the acquisition of new information. Kempermann G, Gage FH. Genetic determinants of adult hippocampal neurogenesis correlate with acquisition, but not probe trial performance, in the water maze task. Eur J Neurosci 16(1) 129-136 Jul 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12153537&dopt=Abstract 12153537 01 MF 1-10 number of cells 344252 17444 298849 12466 281933 37464 386307 9386 435866 67540 343767 29226 303769 308851 2741 335002 2965 292057 13429 309037 16105 348995 18523 284144 12553 6/14/2003 MK Sullivan table 2 12153537.01 Age Related T-Cell Decline - Concavalin-A induced Thymic T-Cell proliferative response (average of days 2 and 4) Age-related decline in thymic T-cell development in 22-month-old C57BL/6J X DBA/2J (BXD) recombinant inbred strains of mice was functionally and phenotypically analyzed and genetically mapped. There was a positive correlation of the concanavalin A (Con A)-induced thymocyte proliferative response with the capability of thymocytes to mature to the CD4(+)CD8(+) stage. The accumulation of CD4(-)CD8(-) stage of thymocytes in 22-month-old BXD mice was further identified to be associated with a developmental block between the CD25(-)CD44(+) and the CD25(+)CD44(+) stages. The quantitative trait loci regulating the Con A-induced thymocyte proliferative response were mapped to mouse chromosome 1, 3, and 11, nearest to 32.1 centimorgan (cM), 5.6 cM, and 18.0 cM, respectively. Our results suggest that several genetic loci regulate the intra-thymic T-cell maturation process and play an important role in determining age-related decline in thymic T-cell development. Hsu HC, Mountz JD, Williams RW, Shelton BJ, Yang PA, Matsuki Y, Xu X, Dodd CH, Li L, Geiger H, Zhang HG, Van Zant G Age-related change in thymic T-cell development is associated with genetic loci on mouse chromosomes 1, 3, and 11 Mech Ageing Dev 123(8) 1145-1158 Apr 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12044964&dopt=Abstract 12044964 01 22 months ~671 Female 2-4 9933 3647 5404 1259 2782 218 0 9115 1725 6777 684 911 389 1298 478 175 92 5033 8719 954 11363 1045 47862 5486 24487 8662 135191 7/29/2003 MK Sullivan 12044964.01 Metastasis of Implanted Breast Tumor - Lymph node (note: proportion of 5 mice) [number of mice with tumor metastasis] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 01 12 months 365 Female 5 number of mice with tumor metastasis 0 0 0 0 0 0 0 0 0 5 3 0 4 5 3 0 7/3/2003 MK Sullivan 12209979.01 Metastasis of Implanted Breast Tumor - Pancreas (note: proportion of 5 mice) [number of mice with tumor metastasis] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 02 12 months 365 Female 5 number of mice with tumor metastasis 0 0 0 0 0 0 0 0 0 3 2 0 3 2 3 0 7/3/2003 MK Sullivan 12209979.02 Necrosis of Implanted Breast Tumor (note: proportion of 5 mice) [number of mice with tumor metastasis] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 03 12 months 365 Female 5 number of mice with tumor metastasis 0 1 0 0 0 0 0 0 0 5 5 0 5 5 5 0 7/3/2003 MK Sullivan 12209979.03 Age Related Thymic involution slope (-Beta1x10^4) Hsu H-C, Zhang H-G, Li L, Yi N, Yang P-A, Wu Q, Wu Y, Renda J, Xu X, Yang X-W, Lu L, Van Zant G, Williams RW, Allison DB, Mountz JD. Age-related thymic involution in C57BL/6J x DBA/2J recombinant inbred mice maps to chromosomes 9 and 10. 70 Female 41 3 49 4 37 3 35 9 132 5 30 9 45 9 50 2 59 4 37 9 52 3 62 7 26 3 52 10 65 11 36 17 52 9 34 7 66 4 56 8 39 3 .7 Age Related T-Cell Decline % of CD4 negative CD8 negative DN cells [%] Age-related decline in thymic T-cell development in 22-month-old C57BL/6J X DBA/2J (BXD) recombinant inbred strains of mice was functionally and phenotypically analyzed and genetically mapped. There was a positive correlation of the concanavalin A (Con A)-induced thymocyte proliferative response with the capability of thymocytes to mature to the CD4(+)CD8(+) stage. The accumulation of CD4(-)CD8(-) stage of thymocytes in 22-month-old BXD mice was further identified to be associated with a developmental block between the CD25(-)CD44(+) and the CD25(+)CD44(+) stages. The quantitative trait loci regulating the Con A-induced thymocyte proliferative response were mapped to mouse chromosome 1, 3, and 11, nearest to 32.1 centimorgan (cM), 5.6 cM, and 18.0 cM, respectively. Our results suggest that several genetic loci regulate the intra-thymic T-cell maturation process and play an important role in determining age-related decline in thymic T-cell development. Hsu HC, Mountz JD, Williams RW, Shelton BJ, Yang PA, Matsuki Y, Xu X, Dodd CH, Li L, Geiger H, Zhang HG, Van Zant G Age-related change in thymic T-cell development is associated with genetic loci on mouse chromosomes 1, 3, and 11 Mech Ageing Dev 123(8) 1145-1158 Apr 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12044964&dopt=Abstract 12044964 02 22 months ~671 Female 2-4 % 3.8 0.4 11.4 0.7 3.7 16 44.4 12.5 8.7 1.5 5.8 1.1 11.5 2.4 8.8 0.8 5.9 1.2 33.5 5.4 0.6 5.3 0.7 8 1.5 6.1 2.3 2.2 7/29/2003 MK Sullivan 12044964.02 Age Related T-Cell Decline % of CD4 positive CD8 positive DP cells [%] Age-related decline in thymic T-cell development in 22-month-old C57BL/6J X DBA/2J (BXD) recombinant inbred strains of mice was functionally and phenotypically analyzed and genetically mapped. There was a positive correlation of the concanavalin A (Con A)-induced thymocyte proliferative response with the capability of thymocytes to mature to the CD4(+)CD8(+) stage. The accumulation of CD4(-)CD8(-) stage of thymocytes in 22-month-old BXD mice was further identified to be associated with a developmental block between the CD25(-)CD44(+) and the CD25(+)CD44(+) stages. The quantitative trait loci regulating the Con A-induced thymocyte proliferative response were mapped to mouse chromosome 1, 3, and 11, nearest to 32.1 centimorgan (cM), 5.6 cM, and 18.0 cM, respectively. Our results suggest that several genetic loci regulate the intra-thymic T-cell maturation process and play an important role in determining age-related decline in thymic T-cell development. Hsu HC, Mountz JD, Williams RW, Shelton BJ, Yang PA, Matsuki Y, Xu X, Dodd CH, Li L, Geiger H, Zhang HG, Van Zant G Age-related change in thymic T-cell development is associated with genetic loci on mouse chromosomes 1, 3, and 11 Mech Ageing Dev 123(8) 1145-1158 Apr 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12044964&dopt=Abstract 12044964 03 22 months ~671 Female 2-4 % 84.6 1.3 68.4 4.1 86.9 64.2 43.7 13.4 80.5 6.9 64.7 3.8 70.1 6.7 73 4.6 76.4 15.2 43.6 87.3 2.8 82.1 5.5 77.1 4.5 81.5 4.2 90.1 7/29/2003 MK Sullivan 12044964.03 Age Related T-Cell Decline % of CD25 negative CD44 positive DN cells [%] Age-related decline in thymic T-cell development in 22-month-old C57BL/6J X DBA/2J (BXD) recombinant inbred strains of mice was functionally and phenotypically analyzed and genetically mapped. There was a positive correlation of the concanavalin A (Con A)-induced thymocyte proliferative response with the capability of thymocytes to mature to the CD4(+)CD8(+) stage. The accumulation of CD4(-)CD8(-) stage of thymocytes in 22-month-old BXD mice was further identified to be associated with a developmental block between the CD25(-)CD44(+) and the CD25(+)CD44(+) stages. The quantitative trait loci regulating the Con A-induced thymocyte proliferative response were mapped to mouse chromosome 1, 3, and 11, nearest to 32.1 centimorgan (cM), 5.6 cM, and 18.0 cM, respectively. Our results suggest that several genetic loci regulate the intra-thymic T-cell maturation process and play an important role in determining age-related decline in thymic T-cell development. Hsu HC, Mountz JD, Williams RW, Shelton BJ, Yang PA, Matsuki Y, Xu X, Dodd CH, Li L, Geiger H, Zhang HG, Van Zant G Age-related change in thymic T-cell development is associated with genetic loci on mouse chromosomes 1, 3, and 11 Mech Ageing Dev 123(8) 1145-1158 Apr 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12044964&dopt=Abstract 12044964 04 22 months ~671 Female 2-4 % 41.2 3.2 20 5.6 21.5 45.2 55.5 15.3 40.0 3.6 22 8.5 37.3 10.1 41.8 1.6 17.1 1.2 15 16.8 4.1 32.4 4.9 43.9 3.5 39.4 4.3 20.5 7/29/2003 MK Sullivan 12044964.04 Age Related T-Cell Decline % of CD25 positive CD44 negative DN cells [%] Age-related decline in thymic T-cell development in 22-month-old C57BL/6J X DBA/2J (BXD) recombinant inbred strains of mice was functionally and phenotypically analyzed and genetically mapped. There was a positive correlation of the concanavalin A (Con A)-induced thymocyte proliferative response with the capability of thymocytes to mature to the CD4(+)CD8(+) stage. The accumulation of CD4(-)CD8(-) stage of thymocytes in 22-month-old BXD mice was further identified to be associated with a developmental block between the CD25(-)CD44(+) and the CD25(+)CD44(+) stages. The quantitative trait loci regulating the Con A-induced thymocyte proliferative response were mapped to mouse chromosome 1, 3, and 11, nearest to 32.1 centimorgan (cM), 5.6 cM, and 18.0 cM, respectively. Our results suggest that several genetic loci regulate the intra-thymic T-cell maturation process and play an important role in determining age-related decline in thymic T-cell development. Hsu HC, Mountz JD, Williams RW, Shelton BJ, Yang PA, Matsuki Y, Xu X, Dodd CH, Li L, Geiger H, Zhang HG, Van Zant G Age-related change in thymic T-cell development is associated with genetic loci on mouse chromosomes 1, 3, and 11 Mech Ageing Dev 123(8) 1145-1158 Apr 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12044964&dopt=Abstract 12044964 05 22 months ~671 Female 2-4 % 13.2 1.5 2.1 0.7 32.9 12 2.4 0.8 28.2 1.2 6.3 0.5 20.4 3.2 19.8 4.5 25.8 5.1 1.5 12.9 2.3 18.6 4.9 16.6 5.8 15.3 7.6 22.8 7/29/2003 MK Sullivan 12044964.05 Age Related T-Cell Decline % of CD25 negative CD44 negative DN cells [%] Age-related decline in thymic T-cell development in 22-month-old C57BL/6J X DBA/2J (BXD) recombinant inbred strains of mice was functionally and phenotypically analyzed and genetically mapped. There was a positive correlation of the concanavalin A (Con A)-induced thymocyte proliferative response with the capability of thymocytes to mature to the CD4(+)CD8(+) stage. The accumulation of CD4(-)CD8(-) stage of thymocytes in 22-month-old BXD mice was further identified to be associated with a developmental block between the CD25(-)CD44(+) and the CD25(+)CD44(+) stages. The quantitative trait loci regulating the Con A-induced thymocyte proliferative response were mapped to mouse chromosome 1, 3, and 11, nearest to 32.1 centimorgan (cM), 5.6 cM, and 18.0 cM, respectively. Our results suggest that several genetic loci regulate the intra-thymic T-cell maturation process and play an important role in determining age-related decline in thymic T-cell development. Hsu HC, Mountz JD, Williams RW, Shelton BJ, Yang PA, Matsuki Y, Xu X, Dodd CH, Li L, Geiger H, Zhang HG, Van Zant G Age-related change in thymic T-cell development is associated with genetic loci on mouse chromosomes 1, 3, and 11 Mech Ageing Dev 123(8) 1145-1158 Apr 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12044964&dopt=Abstract 12044964 06 22 months ~671 Female 2-4 % 43.6 2.5 78.2 6.4 44.5 40.5 42.7 12.7 28.9 3.8 71.9 15.3 37.6 8.5 36.8 1.8 66.7 14.2 82.3 71.8 6.1 46 3.4 36.6 6.3 44.2 11.2 56.4 7/29/2003 MK Sullivan 12044964.06 Implanted Breast Tumor Growth - Tumor Type (note: ordered categorical data) [number of mice with tumor metastasis] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 04 12 months 365 Female 5 number of mice with tumor metastasis 4 2 4 4 3 2 3 2 4 1 1 3 1 1 1 2 7/3/2003 MK Sullivan 12209979.04 Thymocyte Count initial (Beta 0) Hsu H-C, Zhang H-G, Li L, Yi N, Yang P-A, Wu Q, Wu Y, Renda J, Xu X, Yang X-W, Lu L, Van Zant G, Williams RW, Allison DB, Mountz JD. Age-related thymic involution in C57BL/6J x DBA/2J recombinant inbred mice maps to chromosomes 9 and 10. 71 Female 23.3 2 10.4 1.6 28.4 3.3 26.5 3.9 32.6 8.3 17.3 4.9 24.6 5.7 15.2 4.2 37.2 4 36.4 4.2 21.5 3.6 26.7 13.4 22 4.2 33.2 4.9 30 11 39.7 4.3 16.4 3.9 35.2 6.5 33.3 6.9 14.1 4.1 25.5 9.6 .71 Projected day 60 Thymocyte count Hsu H-C, Zhang H-G, Li L, Yi N, Yang P-A, Wu Q, Wu Y, Renda J, Xu X, Yang X-W, Lu L, Van Zant G, Williams RW, Allison DB, Mountz JD. Age-related thymic involution in C57BL/6J x DBA/2J recombinant inbred mice maps to chromosomes 9 and 10. 72 Female 23.1 10.8 29.2 24.9 39.1 16.4 25.1 20.4 37.3 37.5 25 27.9 22.2 29.8 32.6 40.8 18.9 40.4 34.9 16.7 24.9 .72 Morris Water Maze - Log Latency 1 The Morris navigation task is widely used to study spatial abilities in rodents; namely, to analyze the effects of mutations in genetically engineered mice. Although quantitative and Mendelian genetic studies have shown that the variation of these abilities is partly under genetic control, little is known about these genetic factors. In order to analyze the genetic architecture of spatial navigation in mice, a wide genome scan was performed to map the QTLs that control various aspects of the performance, using the RI strain methodology. Latencies to locate the submerged platform across learning sessions and performance to the spatial probe test were analyzed in the 26 strains of the B x D RI series. Both cluster analysis of behavioral measurements and QTL mapping confirmed previous data showing that the escape latencies and the spatial bias rely on two distinct components of the task, controlled by different loci. A QTL on chromosome 1 influenced escape latencies during the four training sessions, whereas another QTL, located on chromosome 5, was shown to control spatial performance at the probe trial and also exhibited epistatic interactions with two other QTLs on chromosomes 2 and 13. The function of these QTLs is examined in the broader context of hippocampal-dependent learning processes and in relation to QTLs already found in similar positions in other behavioral traits. Milhaud JM, Halley H, Lassalle JM. Two QTLs located on chromosomes 1 and 5 modulate different aspects of the performance of mice of the B x D Ty RI strain series in the Morris navigation task Behav Genet 32(1) 69-78 Jan 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11958544&dopt=Abstract 11958544 01 1.814 1.432 1.254 1.646 1.463 1.277 1.357 1.674 1.636 1.43 1.854 1.571 1.64 1.578 1.746 1.803 1.352 1.365 1.51 1.346 1.657 1.67 1.795 1.59 1.597 1.371 11958544.01 Morris Water Maze - Log Latency 2 The Morris navigation task is widely used to study spatial abilities in rodents; namely, to analyze the effects of mutations in genetically engineered mice. Although quantitative and Mendelian genetic studies have shown that the variation of these abilities is partly under genetic control, little is known about these genetic factors. In order to analyze the genetic architecture of spatial navigation in mice, a wide genome scan was performed to map the QTLs that control various aspects of the performance, using the RI strain methodology. Latencies to locate the submerged platform across learning sessions and performance to the spatial probe test were analyzed in the 26 strains of the B x D RI series. Both cluster analysis of behavioral measurements and QTL mapping confirmed previous data showing that the escape latencies and the spatial bias rely on two distinct components of the task, controlled by different loci. A QTL on chromosome 1 influenced escape latencies during the four training sessions, whereas another QTL, located on chromosome 5, was shown to control spatial performance at the probe trial and also exhibited epistatic interactions with two other QTLs on chromosomes 2 and 13. The function of these QTLs is examined in the broader context of hippocampal-dependent learning processes and in relation to QTLs already found in similar positions in other behavioral traits. Milhaud JM, Halley H, Lassalle JM. Two QTLs located on chromosomes 1 and 5 modulate different aspects of the performance of mice of the B x D Ty RI strain series in the Morris navigation task Behav Genet 32(1) 69-78 Jan 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11958544&dopt=Abstract 11958544 02 1.483 1.244 1.094 1.405 1.444 1.257 1.176 1.427 1.505 1.395 1.603 1.414 1.463 1.565 1.51 1.551 1.176 1.341 1.204 1.169 1.337 1.392 1.587 1.26 1.513 1.219 11958544.02 Morris Water Maze - Log Latency 3 The Morris navigation task is widely used to study spatial abilities in rodents; namely, to analyze the effects of mutations in genetically engineered mice. Although quantitative and Mendelian genetic studies have shown that the variation of these abilities is partly under genetic control, little is known about these genetic factors. In order to analyze the genetic architecture of spatial navigation in mice, a wide genome scan was performed to map the QTLs that control various aspects of the performance, using the RI strain methodology. Latencies to locate the submerged platform across learning sessions and performance to the spatial probe test were analyzed in the 26 strains of the B x D RI series. Both cluster analysis of behavioral measurements and QTL mapping confirmed previous data showing that the escape latencies and the spatial bias rely on two distinct components of the task, controlled by different loci. A QTL on chromosome 1 influenced escape latencies during the four training sessions, whereas another QTL, located on chromosome 5, was shown to control spatial performance at the probe trial and also exhibited epistatic interactions with two other QTLs on chromosomes 2 and 13. The function of these QTLs is examined in the broader context of hippocampal-dependent learning processes and in relation to QTLs already found in similar positions in other behavioral traits. Milhaud JM, Halley H, Lassalle JM. Two QTLs located on chromosomes 1 and 5 modulate different aspects of the performance of mice of the B x D Ty RI strain series in the Morris navigation task Behav Genet 32(1) 69-78 Jan 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11958544&dopt=Abstract 11958544 03 1.424 1.195 1.051 1.134 1.282 1.002 1.037 1.249 1.33 1.141 1.422 1.344 1.336 1.401 1.298 1.325 1.079 1.314 1.397 1.041 1.137 1.264 1.393 1.202 1.505 1.009 11958544.03 Brain weight [mg] The proliferation and survival of different cell types is thought to be modulated during development to achieve near optimal ratios and functional balance. We have tested the precision of coregulation of numbers of neurons, glial cells, and endothelial cells in the dorsal lateral geniculate nucleus (LGN) of 58 isogenic strains of mice. We also acquired matched counts of retinal ganglion cells. Our aim has been to test the precision of numerical matching among multiple cell types in the primary visual system and to test the neurotrophic hypothesis. All cells were counted using unbiased counting protocols and tissue that is part of the Mouse Brain Library (www.mbl.org). Classification criteria were assessed in a parallel immunohistochemical analysis. The LGN contains an average of 17,000 neurons, 12,000 glial cells, and 10,000 endothelial cells. There is substantial variation around these meansÑgenerally, two-fold differences per cell type. Strain differences in LGN volume correlate moderately well with glial cell number (r = 0.61, p < 0.01), less so with retinal ganglion cell number (r = 0.41, p < 0.01), and surprisingly weakly with the total population of neurons (r = 0.22, p < 0.10). Numbers of neurons and glial cells correlate only modestly (r = 0.40, p < 0.01). The single most surprising and unequivocal finding was the lack of any detectable correlation between populations of LGN neurons and retinal ganglion cellsÑa correlation of merely 0.05 with a set of 57 strains. We conclude that numbers of these two functionally coupled cell populations are modulated over a wide range by independent genetic and developmental mechanisms. Seecharan DJ, Kulkarni AL, Lu L, Rosen GD, Williams RW Genetic Control of Interconnected Neuronal Populations in the Mouse Primary Visual System submitted 73 478 6.0 393 9.0 441 12.4 424 7.4 540 10.4 428 12.7 431 3.6 434 5.5 438 13.2 415 5.6 444 11.2 453 5.2 431 11.8 419 11.2 432 13.0 392 3.9 446 5.7 414 9.7 407 9.0 401 18.0 352 2.2 394 7.0 376 10.5 369 11.7 414 9.5 443 5.8 424 12.8 414 10.0 402 6.0 403 11.8 418 9.8 393 14.9 431 7.9 449 8.0 .73 Lateral Geniculate Nucleus Volume (mm3) The proliferation and survival of different cell types is thought to be modulated during development to achieve near optimal ratios and functional balance. We have tested the precision of coregulation of numbers of neurons, glial cells, and endothelial cells in the dorsal lateral geniculate nucleus (LGN) of 58 isogenic strains of mice. We also acquired matched counts of retinal ganglion cells. Our aim has been to test the precision of numerical matching among multiple cell types in the primary visual system and to test the neurotrophic hypothesis. All cells were counted using unbiased counting protocols and tissue that is part of the Mouse Brain Library (www.mbl.org). Classification criteria were assessed in a parallel immunohistochemical analysis. The LGN contains an average of 17,000 neurons, 12,000 glial cells, and 10,000 endothelial cells. There is substantial variation around these meansÑgenerally, two-fold differences per cell type. Strain differences in LGN volume correlate moderately well with glial cell number (r = 0.61, p < 0.01), less so with retinal ganglion cell number (r = 0.41, p < 0.01), and surprisingly weakly with the total population of neurons (r = 0.22, p < 0.10). Numbers of neurons and glial cells correlate only modestly (r = 0.40, p < 0.01). The single most surprising and unequivocal finding was the lack of any detectable correlation between populations of LGN neurons and retinal ganglion cellsÑa correlation of merely 0.05 with a set of 57 strains. We conclude that numbers of these two functionally coupled cell populations are modulated over a wide range by independent genetic and developmental mechanisms. Seecharan DJ, Kulkarni AL, Lu L, Rosen GD, Williams RW Genetic Control of Interconnected Neuronal Populations in the Mouse Primary Visual System submitted 74 0.30 0.02 0.26 0.01 0.30 0.03 0.25 0.02 0.36 0.02 0.23 0.01 0.29 0.03 0.32 0.02 0.23 0.01 0.26 0.02 0.26 0.01 0.29 0.01 0.26 0.02 0.25 0.03 0.31 0.01 0.25 0.01 0.33 0.04 0.35 0.01 0.25 0.01 0.26 0.02 0.25 0.01 0.23 0.01 0.24 0.02 0.23 0.01 0.28 0.02 0.27 0.01 0.25 0.02 0.28 0.03 0.28 0.01 0.27 0.02 0.27 0.01 0.32 0.02 0.35 0.01 0.31 0.01 .74 Total Lateral Geniculate Nucleus Cell Number x 1000 The proliferation and survival of different cell types is thought to be modulated during development to achieve near optimal ratios and functional balance. We have tested the precision of coregulation of numbers of neurons, glial cells, and endothelial cells in the dorsal lateral geniculate nucleus (LGN) of 58 isogenic strains of mice. We also acquired matched counts of retinal ganglion cells. Our aim has been to test the precision of numerical matching among multiple cell types in the primary visual system and to test the neurotrophic hypothesis. All cells were counted using unbiased counting protocols and tissue that is part of the Mouse Brain Library (www.mbl.org). Classification criteria were assessed in a parallel immunohistochemical analysis. The LGN contains an average of 17,000 neurons, 12,000 glial cells, and 10,000 endothelial cells. There is substantial variation around these meansÑgenerally, two-fold differences per cell type. Strain differences in LGN volume correlate moderately well with glial cell number (r = 0.61, p < 0.01), less so with retinal ganglion cell number (r = 0.41, p < 0.01), and surprisingly weakly with the total population of neurons (r = 0.22, p < 0.10). Numbers of neurons and glial cells correlate only modestly (r = 0.40, p < 0.01). The single most surprising and unequivocal finding was the lack of any detectable correlation between populations of LGN neurons and retinal ganglion cellsÑa correlation of merely 0.05 with a set of 57 strains. We conclude that numbers of these two functionally coupled cell populations are modulated over a wide range by independent genetic and developmental mechanisms. Seecharan DJ, Kulkarni AL, Lu L, Rosen GD, Williams RW Genetic Control of Interconnected Neuronal Populations in the Mouse Primary Visual System submitted 75 46.7 2.0 37.0 1.7 36.9 2.5 34.6 2.0 46.4 2.1 34.8 2.1 41.7 3.5 41.9 3.8 36.3 1.9 39.7 5.2 37.3 1.4 41.4 1.4 48.2 2.3 38.7 4.6 35.7 4.1 41.0 3.1 0.33 0.04 0.35 0.01 38.6 0.9 35.0 3.6 31.5 1.6 36.3 2.9 37.2 2.7 36.5 1.5 43.8 1.5 34.2 1.1 38.4 2.7 40.6 1.7 39.3 2.7 40.0 2.6 36.0 1.1 39.3 2.9 43.0 1.9 39.8 3.0 .75 Total Lateral Geniculate Nucleus Neuron Number x 1000 The proliferation and survival of different cell types is thought to be modulated during development to achieve near optimal ratios and functional balance. We have tested the precision of coregulation of numbers of neurons, glial cells, and endothelial cells in the dorsal lateral geniculate nucleus (LGN) of 58 isogenic strains of mice. We also acquired matched counts of retinal ganglion cells. Our aim has been to test the precision of numerical matching among multiple cell types in the primary visual system and to test the neurotrophic hypothesis. All cells were counted using unbiased counting protocols and tissue that is part of the Mouse Brain Library (www.mbl.org). Classification criteria were assessed in a parallel immunohistochemical analysis. The LGN contains an average of 17,000 neurons, 12,000 glial cells, and 10,000 endothelial cells. There is substantial variation around these meansÑgenerally, two-fold differences per cell type. Strain differences in LGN volume correlate moderately well with glial cell number (r = 0.61, p < 0.01), less so with retinal ganglion cell number (r = 0.41, p < 0.01), and surprisingly weakly with the total population of neurons (r = 0.22, p < 0.10). Numbers of neurons and glial cells correlate only modestly (r = 0.40, p < 0.01). The single most surprising and unequivocal finding was the lack of any detectable correlation between populations of LGN neurons and retinal ganglion cellsÑa correlation of merely 0.05 with a set of 57 strains. We conclude that numbers of these two functionally coupled cell populations are modulated over a wide range by independent genetic and developmental mechanisms. Seecharan DJ, Kulkarni AL, Lu L, Rosen GD, Williams RW Genetic Control of Interconnected Neuronal Populations in the Mouse Primary Visual System submitted 76 .76 Total Lateral Geniculate Nucleus Glial Cell Number The proliferation and survival of different cell types is thought to be modulated during development to achieve near optimal ratios and functional balance. We have tested the precision of coregulation of numbers of neurons, glial cells, and endothelial cells in the dorsal lateral geniculate nucleus (LGN) of 58 isogenic strains of mice. We also acquired matched counts of retinal ganglion cells. Our aim has been to test the precision of numerical matching among multiple cell types in the primary visual system and to test the neurotrophic hypothesis. All cells were counted using unbiased counting protocols and tissue that is part of the Mouse Brain Library (www.mbl.org). Classification criteria were assessed in a parallel immunohistochemical analysis. The LGN contains an average of 17,000 neurons, 12,000 glial cells, and 10,000 endothelial cells. There is substantial variation around these meansÑgenerally, two-fold differences per cell type. Strain differences in LGN volume correlate moderately well with glial cell number (r = 0.61, p < 0.01), less so with retinal ganglion cell number (r = 0.41, p < 0.01), and surprisingly weakly with the total population of neurons (r = 0.22, p < 0.10). Numbers of neurons and glial cells correlate only modestly (r = 0.40, p < 0.01). The single most surprising and unequivocal finding was the lack of any detectable correlation between populations of LGN neurons and retinal ganglion cellsÑa correlation of merely 0.05 with a set of 57 strains. We conclude that numbers of these two functionally coupled cell populations are modulated over a wide range by independent genetic and developmental mechanisms. Seecharan DJ, Kulkarni AL, Lu L, Rosen GD, Williams RW Genetic Control of Interconnected Neuronal Populations in the Mouse Primary Visual System submitted 77 .77 Total Lateral Geniculate Nucleus Endothelial Cell Number x 1000 The proliferation and survival of different cell types is thought to be modulated during development to achieve near optimal ratios and functional balance. We have tested the precision of coregulation of numbers of neurons, glial cells, and endothelial cells in the dorsal lateral geniculate nucleus (LGN) of 58 isogenic strains of mice. We also acquired matched counts of retinal ganglion cells. Our aim has been to test the precision of numerical matching among multiple cell types in the primary visual system and to test the neurotrophic hypothesis. All cells were counted using unbiased counting protocols and tissue that is part of the Mouse Brain Library (www.mbl.org). Classification criteria were assessed in a parallel immunohistochemical analysis. The LGN contains an average of 17,000 neurons, 12,000 glial cells, and 10,000 endothelial cells. There is substantial variation around these meansÑgenerally, two-fold differences per cell type. Strain differences in LGN volume correlate moderately well with glial cell number (r = 0.61, p < 0.01), less so with retinal ganglion cell number (r = 0.41, p < 0.01), and surprisingly weakly with the total population of neurons (r = 0.22, p < 0.10). Numbers of neurons and glial cells correlate only modestly (r = 0.40, p < 0.01). The single most surprising and unequivocal finding was the lack of any detectable correlation between populations of LGN neurons and retinal ganglion cellsÑa correlation of merely 0.05 with a set of 57 strains. We conclude that numbers of these two functionally coupled cell populations are modulated over a wide range by independent genetic and developmental mechanisms. Seecharan DJ, Kulkarni AL, Lu L, Rosen GD, Williams RW Genetic Control of Interconnected Neuronal Populations in the Mouse Primary Visual System submitted 78 .78 Total Retinal Ganglion Cell Number x 1000 The proliferation and survival of different cell types is thought to be modulated during development to achieve near optimal ratios and functional balance. We have tested the precision of coregulation of numbers of neurons, glial cells, and endothelial cells in the dorsal lateral geniculate nucleus (LGN) of 58 isogenic strains of mice. We also acquired matched counts of retinal ganglion cells. Our aim has been to test the precision of numerical matching among multiple cell types in the primary visual system and to test the neurotrophic hypothesis. All cells were counted using unbiased counting protocols and tissue that is part of the Mouse Brain Library (www.mbl.org). Classification criteria were assessed in a parallel immunohistochemical analysis. The LGN contains an average of 17,000 neurons, 12,000 glial cells, and 10,000 endothelial cells. There is substantial variation around these meansÑgenerally, two-fold differences per cell type. Strain differences in LGN volume correlate moderately well with glial cell number (r = 0.61, p < 0.01), less so with retinal ganglion cell number (r = 0.41, p < 0.01), and surprisingly weakly with the total population of neurons (r = 0.22, p < 0.10). Numbers of neurons and glial cells correlate only modestly (r = 0.40, p < 0.01). The single most surprising and unequivocal finding was the lack of any detectable correlation between populations of LGN neurons and retinal ganglion cellsÑa correlation of merely 0.05 with a set of 57 strains. We conclude that numbers of these two functionally coupled cell populations are modulated over a wide range by independent genetic and developmental mechanisms. Seecharan DJ, Kulkarni AL, Lu L, Rosen GD, Williams RW Genetic Control of Interconnected Neuronal Populations in the Mouse Primary Visual System submitted 79 .79 Drd1 expression in Nucleus Accumbens - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 01 1146.09 1218.17 1551.25 1431.13 1660.89 1385.05 724.54 1428.62 1437.34 807 1334.39 1747.8 858.06 1234.18 788.02 1345.13 1258.18 MND1NA 10591541.01 Drd1 expression in Nucleus Accumbens - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 02 1165.17 898.7 1236.23 1319.21 1548.25 1407.51 693.2 1662.47 1112.43 1069.25 1415.07 1527.46 850.74 1108.99 559.63 1133.14 944.71 M1D1NA 10591541.02 Drd1 expression in Nucleus Accumbens - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 03 1127 1537.64 1866.27 1543.04 1773.52 1362.6 755.89 1194.78 1762.26 544.75 1253.71 1968.13 865.37 1359.38 1016.41 1557.12 1571.65 M2D1NA 10591541.03 Drd1 expression in Caudate Putamen - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 04 1042.12 1502.01 1181.74 1238.93 2496.82 1913.99 637.83 2071.32 2041.24 1124.94 2497.22 844.1 1433.32 1718.09 947.62 2229.84 1091.13 M1D1CP 10591541.04 Drd1 expression in Caudate Putamen - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 05 678.67 1267.17 500.06 1001.61 2038.68 1812.29 892.36 1420.57 2169.59 579.79 1941.54 1983.04 1704.15 1780.39 1282.96 2015.38 1582.85 M2D1CP 10591541.05 Drd1 expression in Caudate Putamen - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 06 860.395 1384.59 840.9 1120.27 2267.75 1863.14 765.095 1745.945 2105.415 852.365 2219.38 1413.57 1568.735 1749.24 1115.29 2122.61 1336.99 MND1CP 10591541.06 Drd1 expression in Frontal Cortex - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 07 356 500.52 417.91 652.6 484.91 745.82 368.18 427.94 499.4 327.51 614.29 633.2 390.88 347.02 330.04 501.81 321.84 M1D1FC 10591541.07 Drd1 expression in Frontal Cortex - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 08 222.5 673.62 1786.29 305.52 472.75 588.41 482.63 487.41 751.59 112.91 520.06 548.29 347.19 463.85 228.38 757.84 383.92 M2D1FC 10591541.08 Drd1 expresion in Frontal Cortex - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 09 289.25 587.07 1102.1 479.06 478.83 667.115 425.405 457.675 625.495 220.21 567.175 590.745 369.035 405.435 279.21 629.825 352.88 MND1FC 10591541.09 Drd1 expression in ventral midbrain - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 10 112.98 182.53 143.66 302.51 249.05 403.05 317.52 319.56 330.16 190.04 301.39 354.6 218.67 184.15 229.03 221.24 167.52 M1D1VM 10591541.1 Drd1 expression in ventral midbrain - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 11 227.5 345.06 271.11 180.47 255.11 404.21 325.62 312.17 515.21 250.44 358.99 128.85 144.63 128.43 128.72 267.44 215.57 M2D1VM 10591541.11 Drd1 expression in ventral midbrain - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 12 170.24 263.795 207.385 241.49 252.08 403.63 321.57 315.865 422.685 220.24 330.19 241.725 181.65 156.29 178.875 244.34 191.545 MND1VM 10591541.12 Drd2 expression in Nucleus Accumbens - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 13 115.64 231.23 224.3 87.03 215.2 228.65 111.9 203.2 254.42 136.06 227.81 195.84 141.91 252.69 161.82 82.15 244.89 151.57 M1D2NA 10591541.13 Drd2 expression in Nucleus Accumbens - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 14 308.7 321.67 101.75 200.61 212.38 81.26 222.68 210.88 130.91 171.23 151.59 159.22 186.64 72.13 228.88 175.66 M2D2NA 10591541.14 Drd2 expression in Nucleus Accumbens - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 15 115.64 269.965 272.985 94.39 207.905 220.515 96.58 212.94 232.65 133.485 199.52 173.715 141.91 205.955 174.23 77.14 236.885 163.615 MND2NA 10591541.15 Drd2 expression in Caudate Putamen - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 16 67.47 286.9 256.8 128.17 353.21 343.32 129.5 263.71 268.08 97.49 331.8 58.35 49.42 340.32 390.09 132.43 322.32 136.6 M1D2CP 10591541.16 Drd2 expression in Caudate Putamen - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 17 362.04 68.75 146.81 378.43 270.03 92.48 167 245.4 129.03 320.61 175.18 288.78 298 163.73 400.11 271.82 M2D2CP 10591541.17 Drd2 expression in Caudate Putamen - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 18 67.47 324.47 162.775 137.49 365.82 306.675 110.99 215.355 256.74 113.26 326.205 116.765 49.42 314.55 344.045 148.08 361.215 204.21 MND2CP 10591541.18 Drd2 expression in Frontal Cortex - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 19 50.59 36.56 38.41 59.81 50.9 64.47 44.77 47.49 62.96 28.51 57.87 42.6 25.91 63.01 66.75 44.71 83.44 23.54 M1D2FC 10591541.19 Drd2 expression in Frontal Cortex - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 20 58.3 377.59 57.29 32.58 68.1 28.45 47.08 59.79 10.81 55.94 39.29 49.15 76.42 62.11 72.48 32.93 M2D2FC 10591541.2 Drd2 expression in Frontal Cortex - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 21 50.59 47.43 208 58.55 41.74 66.285 36.61 47.285 61.375 19.66 56.905 40.945 25.91 56.08 71.585 53.41 77.96 28.235 MND2FC 10591541.21 Drd2 expression in ventral midbrain - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 22 49.61 0.95 53.95 24.64 58.46 62.65 48.91 41.17 58.22 32.54 61.37 47.44 42.6 46.8 74.43 39.58 44.64 45.91 M1D2VM 10591541.22 Drd2 expression in ventral midbrain - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 23 60.23 60.42 27.86 49.09 59.08 49.41 35.56 68.84 15.55 54.8 43.12 43.83 62.18 34.95 78.16 52.76 M2D2VM 10591541.23 Drd2 expression in ventral midbrain - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 24 49.61 30.59 57.185 26.25 53.775 60.865 49.16 38.365 63.53 24.045 58.085 45.28 42.6 45.315 68.305 37.265 61.4 49.335 MND2VM 10591541.24 Dopamine transporter expression in Nucleus Accumbens - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 25 496.35 4820 2936.87 2956.52 3350.8 3311 1382.24 3887.1 3787.66 3367.63 4630 2679.06 4503.83 4407.5 5570 1485.2 4348 2008.5 M1DAUTNA 10591541.25 Dopamine transporter expression in Nucleus Accumbens - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 26 4930 3283 4445.33 2548 2776.44 2480.13 2734.35 4749 1286.33 3560 4371 3269 3660.97 5320 278.63 6356.38 2748.93 M2DAUTNA 10591541.26 Dopamine transporter expression in Nucleus Accumbens - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 27 496.35 4875 3109.935 3700.925 2949.4 3043.72 1931.185 3310.725 4268.33 2326.98 4095 3525.03 3886.415 4034.235 5445 881.915 5352.19 2378.715 MNDAUTNA 10591541.27 Dopamine transporter Caudate Putamen - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 28 709.36 90 2787.62 2666.34 4228.58 7985 4698.77 3294.14 4768.66 1495.5 6940 6453.62 6741.93 6109.09 8323.33 1967.76 8400.96 4286 M1DAUTCP 10591541.28 Dopamine transporter expression in Caudate Putamen - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 29 6540 7311 3667.55 6359 5249.45 4108.66 2649.03 7018 937.83 7050 5979 7065.5 5028.35 7356.67 2541.46 7281.01 4465.53 M2DAUTCP 10591541.29 Dopamine transporter expression in Caudate Putamen - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 30 709.36 3315 5049.31 3166.945 5293.79 6617.225 4403.715 2971.585 5893.33 1216.665 6995 6216.31 6903.715 5568.72 7840 2254.61 7840.985 4375.765 MNDAUTCP 10591541.3 Dopamine transporter expression in Frontal Cortex - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 31 659.89 380.72 395.51 629.01 549.63 1093 721.69 730.29 1400.65 226.96 658 1639.37 1084.06 981.23 640.5 121.98 1351.14 793.1 M1DAUTFC 10591541.31 Dopamine transporter expression in Frontal Cortex - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 32 533.09 954.9 403.68 97.31 1232.51 472.13 1348.58 606.1 399.67 264 117 1211.12 659.24 440 400.29 1332.19 343.12 M2DAUTFC 10591541.32 Dopamine transporter expression in Frontal Cortex - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 33 659.89 456.905 675.205 516.345 323.47 1162.755 596.91 1039.435 1003.375 313.315 461 878.185 1147.59 820.235 540.25 261.135 1341.665 568.11 MNDAUTFC 10591541.33 Dopamine transporter expression in ventral midbrain - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 34 47.51 376.11 250.61 422.72 346.32 172.3 198.34 124.21 1024.01 834.55 852 390 1083.4 900.86 304 185.13 824.58 324.7 M1DAUTVM 10591541.34 Dopamine transporter in ventral midbrain - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 35 290.49 411.3 737.98 231.1 674.25 492.02 674.14 625.7 419.03 811 84.49 1745.31 350.21 645.33 113.77 942.05 466.97 M2DAUTVM 10591541.35 Dopamine transporter expression in ventral midbrain - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 36 47.51 333.3 330.955 580.35 288.71 423.275 345.18 399.175 824.855 626.79 831.5 237.245 1414.355 625.535 474.665 149.45 883.315 395.835 MNDAUTVM 10591541.36 Open Field Habituation - Difference Score cM distance traveled 0-5 min minus 26-30 min We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 37 3602 7970 2689 9260 7485 5825 7816 4720 7377 6725 4464 6348 5098 5746 5518 5811 3865 9888 10600 4914 5392 7645 9783 DIFFBETA 10591541.37 Cocaine stereotypy - number of repeated movements 5 mg/kg cocaine ip (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 38 23.9 -12.0909 -0.4545 -3.6364 28.4 25 19.8182 -5.5455 32.1 8.4 5.3333 8.625 16 27.8 20.1 18.2222 28 29.3333 31.3 10.8 35.5 12.1818 16.2727 NS1_5DF 10591541.38 Cocaine stereotypy - number of repeated movements 5 mg/kg cocaine ip (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 39 -6.8 -11.9 12.3 18 15.3636 34.75 22.4545 0.7 8.5 12.5 13.5 37.5 21.8333 18.6 15 34 52.3 30 17.8 -1.5 19.333 NS2_5DF 10591541.39 Cocaine stereotypy - number of repeated movements 5 mg/kg cocaine ip (Difference from saline) - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 40 13.6667 -12 5.619 7.6522 21.5714 30.5714 21.1364 -2.5714 20.3 10.45 9.4167 8.625 26.75 25.5625 19.35 16.45 30.6667 39.7727 30.6842 14.3 35.5 5.6667 17.65 NSS_5DF 10591541.4 Cocaine Open Field Activity - total distance 5 mg/kg cocaine (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 41 2194.6 1093.73 653.27 255.13 2711.7 3715.22 1177.6 759.91 1904.4 2046.7 179.83 1372.88 2233.75 1512.5 1201.3 2041.89 1101.89 2742.33 2597.11 1795 2155 1690.27 1310.91 TD1_5DF 10591541.41 Cocaine Open Field Activity - total distance 5 mg/kg cocaine (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 42 1835.8 2194.5 588.7 1351.08 1839.36 4055.36 2005.82 1197 1000.4 1543.22 1182.33 3846.25 2829.67 2100.9 2051.18 2692.25 3533.5 3915.33 2787.8 1762.7 1210.7 TD2_5DF 10591541.42 Cocaine Open Field Activity - total distance 5 mg/kg cocaine (Difference from saline) - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 43 2075 1617.9 622.52 912.7 2254.76 3902.3 1611.43 968.05 1452.4 1808.21 681.08 1372.88 3040 2006.44 1651.1 2047 1850.29 3101.95 3256.22 2291.4 2155 1724.76 1263.19 TDS_5DF 10591541.43 Cocaine activity - vertical rearing movements 5 mg/kg cocaine ip (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 44 -2 1.4545 1.6 2 -0.3333 -2.375 5 -5.7273 -7.5 -8.4 -1 -14 -7.5 -0.4 -4.4 0.4444 -3.1 -1.1667 0.5 -6.6 11.3333 -5.0909 10.5455 VM1_5DF 10591541.44 Cocaine activity - vertical rearing movements 5 mg/kg cocaine ip (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 45 10 7.4 -14.1 6 11 1.5455 0.8182 -4 -5.7 -1 -2.8333 -14 -8 7.1 -3.2727 -7.2857 -1.4 1.5 -8.6 -7.2 4.5 VM2_5DF 10591541.45 Cocaine activity - vertical rearing movements 5 mg/kg cocaine ip (Difference from saline) - mean males and females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 46 2.2857 4.2857 -6.25 4.087 5.9 -0.1053 2.901 -4.9048 -6.6 -4.7 -1.9167 -14 -10.75 -3.5294 1.35 -1.6 -4.8235 -1.2727 1 -7.6 11.3333 -6.0952 7.6667 VMS_5DF 10591541.46 Cocaine stereotypy - number of movements 15 mg/kg cocaine ip (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 47 19.4545 3.6667 14.7 -0.7273 42.6 61.7 45.6364 7.3636 47.6154 16.9 10.5 19 25.5 70.7 62.9 68.4545 50 41.3 33.6364 2 77.333 86.8182 44 NS1_15DF 10591541.47 Cocaine stereotypy - number of movements 15 mg/kg cocaine ip (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 48 -7.44 26.545 40.917 1000.417 86.1 79.5 -1.909 46.3 38.2 25 60.25 53.4 80.7 35.545 39.333 52.273 74.364 18 39.182 61.6 NS2_15DF 10591541.48 Cocaine stereotypy - number of movements 15 mg/kg cocaine ip (Difference from saline) - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 49 19.4545 -1.8889 20.9048 21 74.1364 73.9 61.7619 2.7273 47.0435 27.55 17.0909 19 42.875 64.9333 71.8 52 44.6667 47.0476 54 8.4 77.333 63 52.381 NSS_15DF 10591541.49 Cocaine Open Field Activity - total distance 15 mg/kg cocaine (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 50 3579.18 6650.91 1774.6 3500.6 5088.82 7017.6 4368.64 5007 6213.31 4561.3 3574.83 5452.83 5496.25 6155.3 4326.5 5827.64 4063.4 11211 4230.36 4538 4457 5598.09 4223.64 TD1_15DF 10591541.5 Cocaine Open Field Activity - total distance 15 mg/kg cocaine (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 51 3512.2 3032.18 7606.27 8513.17 9589.56 6710.8 5271.17 4328 5476 3917.2 6116.5 3859 4828.8 5737.82 6150.22 9452 7746.27 1128.25 4944 4797.7 TD2_15DF 10591541.51 Cocaine Open Field Activity - total distance 15 mg/kg cocaine (Difference from saline) - males and females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 52 3579.18 5156.29 2433.33 5651.19 6875.43 8235.89 5483.95 5144.83 5393.61 5018.65 3730.45 5452.83 5806.38 5389.87 4577.65 5782.73 5051.89 10285.21 5988.32 3174.1 4457 5271.05 4497 TDS_15DF 10591541.52 Cocaine activity - vertical rearing movements 15 mg/kg cocaine ip (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 53 -3.3 -6.5455 -11.3333 -0.3636 -3.5455 -19.125 -7.3636 -4.6364 -11.1538 -4.1 1.5 -2.5714 -6.75 -5 -7 -6.0909 -8.4 -3.7 -0.4 -8.3333 -18.8 -6.3636 -2.1 VM1_15DF 10591541.53 Cocaine activity - vertical rearing movements 15 mg/kg cocaine ip (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 54 -1.4444 -9.2 -7.0909 -7.0833 -11.4 -7.9 -3.0833 -15.875 -4.5 -3.4 -7 -7 -14.1111 -5.5455 -8.6667 -1.2727 -9 -0.5 -9.6364 -8.4444 VM2_15DF 10591541.54 Cocaine activity - vertical rearing movements 15 mg/kg cocaine ip (Difference from saline) - mean males and females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 55 2.2857 -4.25 -10.2105 -3.7273 -5.3913 -14.8333 -7.619 -3.8261 -12.9524 -4.3 -0.7273 -2.5714 -6.875 -5.6667 -10.3684 -5.8182 -8.5263 -2.4286 -4.9048 -5.2 -18.8 -8 -5.1053 VMS_15DF 10591541.55 Cocaine stereotypy - number of movements 30 mg/kg cocaine ip (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 56 15.5566 3.8 20 39.6 54.818 71.667 47.5 36.909 81.75 33.778 3.25 41.333 32.25 37.571 59.818 51.385 69 68.727 68.222 18.833 82.2 50.5 109.091 NS1_30DF 10591541.56 Cocaine stereotypy - number of movements 30 mg/kg cocaine ip (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 57 32.75 14 22.545 24 63.545 93.364 76.083 9.636 70 0.556 21.667 70.25 97.4 101.364 77.222 31.2 73.444 120.091 40.455 63.182 NS2_30DF 10591541.57 Cocaine stereotypy - number of movements 30 mg/kg cocaine ip (Difference from saline) - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 58 20.8462 8.9 21.333 31.8 59.1818 83.6 63.0909 23.2727 76.4091 17.1667 11.1429 41.3333 51.25 80 80.5909 61.9545 51 70.85 96.75 18.83333 82.2 45.2381 86.1364 NSS_30DF 10591541.58 Cocaine Open Field Activity - total distance 30 mg/kg cocaine (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 59 5138.78 7692.3 2523.3 9445.14 8038.09 6483.44 8598.8 4809.09 7829 6242.56 3394.13 6141.17 6317.75 5389.86 5089.25 6155.62 5855.36 11323.91 9137.43 6353.67 6395.2 7609.4 7896.2 TD1_30DF 10591541.59 Cocaine Open Field Activity - total distance 30 mg/kg cocaine (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 60 4406.25 8029.9 2724.55 6993.56 7777.18 9570 6825.09 3844.36 3277.8 8067.14 4819 7586.5 7748.2 6778.27 6744.3 3145.89 9256.78 13633 7764.27 10213.09 TD2_30DF 10591541.6 Cocaine Open Field Activity - total distance 30 mg/kg cocaine (Difference from saline) - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 61 4913.38 7861.1 2628.71 8066.13 7907.64 8181.05 7669.71 4326.73 7123.91 7040.81 4004.79 6141.17 6952.13 6372.5 5897.04 6411.57 4636.1 10393.7 11884.72 6353.67 6395.2 7690.52 9109.81 TDS_30DF 10591541.61 Cocaine activity - vertical rearing movements 30 mg/kg cocaine ip (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 62 -9.25 -7.1111 -22.375 -4.4 1.4 -11.4444 -7.8 -3.4545 -15.1667 -10.6667 -1.875 -6.8333 -10 -4.8571 -15.4545 -1.6923 -11.8182 -3.2727 -3.1 -9.1667 -7.25 -8.1 -8.8182 VM1_30DF 10591541.62 Cocaine activity - vertical rearing movements 30 mg/kg cocaine ip (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 63 -11.75 -10.11111 -10.81818 -12 1.81818 -13.54545 -9.16667 -0.72727 -10.6 -5.125 -2.66667 -8 -10.25 -2 -14 -6.3 -10.3 -12.22222 -11.72727 -12.33333 -27 -5.72727 -14.4 VM2_30DF 10591541.63 Cocaine activity - vertical rearing movements 30 mg/kg cocaine ip (Difference from saline) - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 64 -10.0833 -8.6111 -15.6842 -8 1.619 -12.6 -8.5455 -2.0909 -13.0909 -13.2222 -2.2143 -6.8333 -10.125 -3.6667 -15.0952 -3.6957 -11.5 -7.3 -7.619 -9.1667 -7.25 -6.8571 -11.4762 VMS_30DF 10591541.64 Cocaine stereotypy - number of movements 45 mg/kg cocaine ip (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 65 31.125 40.2727 12.08333 14.3636 83.2727 47.2727 30.9 14.7273 89.0833 16.9 1.5 28.375 45.25 36.5714 39.5455 18.2 51.3 79 55.6 16.8333 76.5 5.4 51.1111 NS1_45DF 10591541.65 Cocaine stereotypy - number of movements 45 mg/kg cocaine ip (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 66 51.6 5.8 0.8182 31.2 50.75 58.5556 53 0.2222 74.7273 38.4 10.8 20.75 43.2 66.2 19.333 41.2 57.8 77.4 15.333 33.1818 46.4167 NS2_45DF 10591541.66 Cocaine stereotypy - number of movements 45 mg/kg cocaine ip (Difference from saline) - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 67 39 23.8571 6.6957 22.381 69.5789 52.35 42.4762 8.2 82.2174 27.65 5.7273 28.375 33 39.3333 52.2381 18.8182 46.25 68.4 66.5 16.3333 76.5 19.9524 48.4286 NSS_45DF 10591541.67 Cocaine Open Field Activity - total distance 45 mg/kg cocaine (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 68 5167.88 8081.18 3118.17 7006.45 7651 9608.18 5561.9 5277.55 7793.67 5834.1 5273.83 4397.75 6007.75 4820.57 4210.73 4037.9 4716.67 9595.73 5946.67 5099.67 5787 6691.9 7125.5 TD1_45DF 10591541.68 Cocaine Open Field Activity - total distance 45 mg/kg cocaine (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 69 6258.8 6524.8 3339.09 7076.55 7885.44 7719.89 7430.18 3791.22 7100.36 7641.1 4305.6 5703 5240 5918.6 5297.77 4288.89 7085.9 9051.2 5508.67 7988.18 5792.83 TD2_45DF 10591541.69 Cocaine Open Field Activity - total distance 45 mg/kg cocaine (Difference from saline) - males and females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 70 5587.46 7340.05 3223.83 7041.5 7756.5 8758.45 6540.52 4608.7 7462.09 6737.6 4833.73 4397.75 5855.38 4995.33 5024 4750 4502.78 8400.57 7580.63 5236 5787 7370.9 6325.9 TDS_45DF 10591541.7 Cocaine activity - vertical rearing movements 45 mg/kg cocaine ip (Difference from saline) - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 71 -4 -10.2727 -12.6 -11.7273 -6.1818 -7.7273 -10.5 -4 -8.1667 -10.25 -4.6667 -13.5 -7.75 0.5714 -5.9 -2.7778 -11.5 -0.6364 -6.4 -3 -19 -8.1818 -9.5 VM1_45DF 10591541.71 Cocaine activity - vertical rearing movements 45 mg/kg cocaine ip (Difference from saline) - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 72 -5.5 -12.3 -27 -12.1667 0.375 -22.625 -7.4545 -12.2222 -19.6364 -11.3333 -4 -7.75 -0.4 -7 -8 -16.2 -10.3 -16.4 -11.3333 -16.9 -12.9167 VM2_45DF 10591541.72 Cocaine activity - vertical rearing movements 45 mg/kg cocaine ip (Difference from saline) - male and female mean We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 73 -4.5455 -11.2381 -19.8 -11.9565 -3.4211 -14 -8.9048 -7.7 -13.6522 -10.8235 -4.3636 -13.5 -7.75 0.1667 -6.45 -5.8636 -13.85 -5.2381 -11.4 -5.7778 -19 -11.8571 -11.55 VMS_45DF 10591541.73 Cocaine Open Field Behavior - Total Distance Area Under Curve, 5 mg/kg cocaine, Saline Covariate We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 74 6344.1 5600.6 3904.9 5340.5 5714.2 7861.3 5091.8 4983.1 4877.1 5963.5 4240.7 6514.6 7005.2 5962.8 4785.9 5435.1 5873 6522.6 6735.3 6477.4 6479.8 5332.6 5263.8 AARTDC5 10591541.74 Cocaine Open Field Behavior - Total Distance Area Under Curve, 15 mg/kg cocaine, Saline Covariate We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 75 8070.2 8952.4 6378.8 9327.2 10735.2 12173.5 9471.2 8978.4 9227.5 8828.8 7701.2 9170.7 9655.7 8873.1 8577 9751.9 8952.6 14268.4 9888.3 6628.1 8682.7 9204.5 8352.3 AARTDC15 10591541.75 Cocaine Open Field Behavior - Total Distance Area Under Curve, 30 mg/kg cocaine, Saline Covariate We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 76 8966.9 11803.8 6140.4 12347.2 11570.5 11909.3 11419.9 8272.3 10733.8 11381.1 7682.1 9567 11022.5 10457 9480.2 10020.9 8494 13953.4 15114.6 10095.9 9632.3 11379.2 13001.7 AARTDC30 10591541.76 Cocaine Open Field Behavior - Total Distance Area Under Curve, 45 mg/kg cocaine, Saline Covariate We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 77 10619.6 11321.9 6331.1 11605.6 11243 12728.1 9879 8835.7 10837.6 11773.3 8156.1 10098.4 10310.8 8823.8 8130.9 7990.5 8542.5 11679.6 11098.3 9591.9 10106.3 10914.4 10489.1 AARTDC45 10591541.77 Cocaine Open Field Behavior - Center Time (Difference from saline) 5 mg/kg cocaine - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 85 -53.5 -64.18182 -75.6 -35.90909 -26.22222 -39.11111 -36.27273 -58.27273 -45.6 -30 -65.66667 -54.75 -91.66667 -30.5 0.2 -33 -12.5 -2.25 -0.14286 -12.8 26.4 -55.54545 -31.09091 CT1_5DF 10591541.85 Cocaine Open Field Behavior - Center Time (Difference from saline) 5 mg/kg cocaine - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 86 -33.4 -56.5 -32.875 -16.41667 -60 -43.58333 -17.63636 -15 -33.9 -34.55556 10.33333 -17.33333 -25 -22.33333 44.375 -53.6 -50.5 -10.3 -1.8 -41.6 -30.5 -60 -44.9 CT2_5DF 10591541.86 Cocaine Open Field Behavior - Center Time (Difference from saline) 15 mg/kg cocaine - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 87 -37.72727 -35.18182 -36.22222 -37.18182 -6 -22.2 -11 -24.54545 -23.76923 -25.8 -53.83333 -17.85714 -18 -20.6 39.8 -1.8 -48.22222 -13.66667 -66.63636 3.33333 19.5 -42.5 -57.09091 CT1_15DF 10591541.87 Cocaine Open Field Behavior - Center Time (Difference from saline) 15 mg/kg cocaine - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 78 -52.33333 -69.2 67.1 -30.08333 -8.66667 -45.33333 -20.4 -37.81818 -12.4 -6 53.75 -42 -29 -42.2 38.9 -43.11111 -49.55556 4.9 -47.18182 12.75 26.33333 -80.2 -12.5 CT2_15DF 10591541.78 Cocaine Open Field Behavior - Center Time (Difference from saline) 30 mg/kg cocaine - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 79 -11.11111 -64.1 1.11111 -7.5 1.09091 -41.44444 1.7 19.09091 6.75 -44.88889 25.71429 -4.16667 -37 -9.42857 11.54545 -26.92308 -47.90909 -1 -71.77778 -17.5 -15.6 -18.5 -45.36364 CT1_30DF 10591541.79 Cocaine Open Field Behavior - Center Time (Difference from saline) 30 mg/kg cocaine - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 80 -58.25 -55.3 21.44444 -23.88889 32.63636 -92.45455 37.41667 -44.09091 -3 -37.88889 2.16667 8 -14.75 25.4 30.18182 -39.7 -73.6 -40.375 -74.5 0 44 -43.9 -63.27273 CT2_30DF 10591541.8 Cocaine Open Field Behavior - Center Time (Difference from saline) 45 mg/kg cocaine - males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 81 -17.28571 -67.81818 63.4 -20 -5 -69.45455 -10.3 -30.63636 -4.08333 -31.7 -9.5 -16.75 -17.5 6.71429 55.18182 -53.5 -12.6 41.6 -32.9 20.33333 -8.5 0.09091 -61.55556 CT1_45DF 10591541.81 Cocaine Open Field Behavior - Center Time (Difference from saline) 45 mg/kg cocaine - females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 82 -33.6 11.3 17.1 1.5 67.88889 -38.33333 36.63636 -26.44444 -10 -55.4 -12 -62.5 92.5 22 62.1 3.33333 -38.22222 -6.5 -47.7 -12 9 -2.2 -49.66667 CT2_45DF 10591541.82 Open Field Habituation - Difference Score cM distance traveled 0-5 min minus 26-30 min - Males We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 83 3703 8768 2398 11354 6675 3863 9278 5540 7742 5381 4402 6348 5393 5415 5138 5527 6118 11639 7952 5848 5392 7660 8248 DIFBETAM 10591541.83 Open Field Habituation - Difference Score cM distance traveled 0-5 min minus 26-30 min - Females We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 84 3303 7068 2961 7784 8209 7369 6527 3869 6799 8371 4770 4781 5942 5984 7237 1189 7814 12083 -3478 7618 11201 DIFBETAF 10591541.84 Cortex Iron Levels Male We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 0.5 22.9 33.2 12.7 19.8 18 24.6 18.7 19.3 19.8 24.3 21.3 19.9 14.9 20.2 15.4 FECXM 10591541.005 Cortex Iron Levels Female We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 0.51 25.8 15.4 27.4 19.9 17.9 15.3 22 21.3 19.8 23.7 21.2 24.8 19.3 20.3 13.9 FECXF 10591541.0051 Caudate Putamen Iron Levels Male We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 0.52 13.9 16.5 15.7 21.9 13.7 16.5 12.1 18.5 22.6 19.8 20.9 26.2 18.7 18.7 17.1 FECPM 10591541.0052 Caudate Putamen Iron Levels Female We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 0.53 15.9 19.2 15.3 21.6 14.8 13.7 23.7 18.7 19.8 21 17 21.9 17.6 18.2 14.1 FECPF 10591541.0053 Nucleus Accumbens Iron Levels Male We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 0.54 20.1 24.8 15.5 26.8 19.8 25.6 19.6 26 25.9 22.8 22.9 22 22 19.9 20.6 FENAM 10591541.0054 Nucleus Accumbens Iron Levels Female We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 0.55 18.8 26.1 19.1 32.4 22.2 14.7 27.1 24.3 23.4 24.6 20.7 30.1 24 22.8 20.1 FENAF 10591541.0055 Midbrain Iron Levels male We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 0.56 15.1 17.2 19.1 29.4 15.6 20.7 17.5 29.3 35.1 36.8 33.6 29.9 15.5 17.9 16.6 FEMBM 10591541.0056 Midbrain Iron Levels Female We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 0.57 14.2 18.3 17.1 38.4 14.4 15.7 16.4 29.3 33.2 35.9 29.6 36 17.5 20.7 17.2 FEMBF 10591541.0057 Liver Iron Levels Male We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 0.58 94.7 105.2 116.6 145.2 121.8 126.9 92.8 99.3 114.4 112.2 103 105 172.3 132.7 205.7 FELIVM 10591541.0058 Liver Iron Levels Female We recently conducted a dose-response study of the effects of cocaine on several activity measures in the panel of BxD/Ty recombinant inbred mice. Animals were tested in an automated activity chamber over 2 days with i.p. saline on day 1 and i.p. cocaine on day 2, at one of four doses, 5, 15, 30 or 45 mg kg(-1). The monitor recorded total distance traveled, nosepokes in a holeboard, repeated movements and time spent by an individual in proximity to the centre of the apparatus. Dose-response curves for locomotor activation, i.e. the difference between cocaine and saline scores, showed that for all strains tested, scores increased 5-30 mg kg(-1). With few exceptions, locomotor activity at 45 mg kg(-1) was not significantly higher than that at 30 mg kg(-1). Repeated movement scores showed patterns similar to locomotor activity and nosepokes tended to be progressively inhibited by increasing doses of cocaine. Recombinant inbred strain mean distributions for all behaviours and at all doses exhibited continuous, rather than discrete variation, thus providing evidence of multiple-gene effects on cocaine-related behaviours. Quantitative trait loci (QTL) analysis pointed to several chromosomal locations associated with variations in cocaine-related behaviours and some are either identical or close to QTL reported by others. In separate groups of animals, densities of dopamine D1, and D2 receptors and dopamine uptake transporters were measured in the medial prefrontal cortex, caudate-putamen, nucleus accumbens and ventral midbrain. In all areas, all measures showed distributions consistent with polygenic influence and were associated with QTL. Of particular interest was our finding of a large segment on chromosome 15, which is related to dopamine receptor densities and cocaine-related behaviours. Jones BC, Tarantino LM, Rodriguez LA, Reed CL, McClearn GE, Plomin R, Erwin VG. Quantitative-trait loci analysis of cocaine-related behaviours and neurochemistry. Pharmacogenetics 9(5) 607-617 Oct 1999 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=10591541&dopt=Abstract 10591541 0.59 142.1 187.4 135 138.7 204.9 201.5 154.9 181.8 116.4 154.4 159 134.2 143 214.7 233.8 FELIVF 10591541.0059 Proliferation of lin-Sca1++ cells responding to early-acting factors: kit ligand (KL), flt3 ligand (flt3L), thrombopoietin (TPO) [cell number] Quantitative trait analysis may shed light on mechanisms regulating hematopoiesis in vivo. Strain-dependent variation existed among C57BL/6 (B6), DBA/2, and BXD recombinant inbred mice in the responsiveness of primitive progenitor cells to the early-acting cytokines kit ligand, flt3 ligand, and thrombopoietin. A significant quantitative trait locus was found on chromosome 2Êthat could not be confirmed in congenic mice, however, probably because of epistasis. Because it has been shown that alleles of unknown X-linked genes confer a selective advantage to hematopoietic stem cells in vivo in humans and in cats, we also analyzed reciprocal male D2B6F1 and B6D2F1 mice, revealing an X-linked locus regulating the responsiveness of progenitor and stem cells to early-acting factors. Among DBA/2, B6, and BXD recombinant inbred mice, correlating genetic variation was found in the absolute number and frequency of LinSca1++kit+ cells, which are highly enriched in hematopoietic progenitor and stem cells, and in the number of LinSca1++kit cells, a population whose biologic significance is unknown, suggesting that both populations are functionally related. Suggestive quantitative trait loci (QTLs) for the number of LinSca1++ cells on chromosomes 2,Ê4,Êand 7Êwere confirmed in successive rounds of mapping. The locus on chromosome 2Êwas confirmed in congenic mice. We thus demonstrated genetic variation in the response to cytokines critical for hematopoiesis in vivo and in the pool size of cells belonging to a phenotype used to isolate essentially pure primitive progenitor and stem cells, and we identified loci that may be relevant to the regulation of hematopoiesis in steady state. Henckaerts E, Geiger H, Langer JC, Rebollo P, Van Zant G, Snoeck HW Genetically determined variation in the number of phenotypically defined progenitor and stem cells and in their response to early-acting cytokines Blood 99(11) 3947-3954 Jun 2002 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12010793&dopt=Abstract 12010793 01 6-8 wks 42 56 Female 3 cell number 240 0 1066 0 4369 2119 124 72 635 0 371 0 946 0 886 0 2599 0 1377 0 2946 0 3365 833 2874 0 1725 324 527 0 3533 0 1066 0 311 0 1293 0 515 0 4766 1508 1964 511 1293 0 443 0 1856 0 2527 983 299 0 419 0 6/5/2003 MK Sullivan MK Sullivan 12010793.01 Concurrence of peripheral blood B220% [%] Relative proportions of peripheral blood (PB) B lymphocytes (B220%) as well as CD4 (CD4%) and CD8 (CD8%) T lymphocytes differ significantly among inbred mouse strains: B220% is high in C57BL/6J (B6) and C57BR/cdJ, intermediate in BALB/cByJ (BALB) and DBA/2J (D2), and low in NOD/LtJ (NOD) and SJL/J (SJL) mice, whereas CD4% and CD8% are high in NOD and SJL mice and low in the other 4 strains. By following segregating genetic markers linked to these traits in (B6 x D2) recombinant inbred (BXD RI) mice, the study defined 2 quantitative trait loci (QTLs) for the B220% phenotype: Pbbcp1 (peripheral blood B cell percentage 1, logarithm of odds [LOD] 4.1, P <.000 01) and Pbbcp2 (LOD 3.7, P <.000 04) on chromosome 1 (Chr 1) at about 63 cM and 48 cM; one suggestive locus for the CD4% phenotype (LOD 2.6, P <.000 57) on Chr 8 at about 73 cM; and one QTL for the CD8% phenotype: Pbctlp1 (peripheral blood cytotoxic T lymphocyte percentage 1, LOD 3.8, P <.000 02) on Chr 19 at about 12 cM. The study further segregated PB lymphocyte proportions in B6SJLF2 mice by using DNA markers adjacent to these mapped QTLs and found that the Pbbcp1 locus (LOD 5.6, P <.000 01) was also important in this mouse population. In both BXD RI and B6SJLF2 mice, QTLs regulating B-cell proportions showed no significant effect on T-cell proportions and vice versa. Thus, PB B- and T-lymphocyte proportions are regulated separately by different genetic elements. Chen J, Harrison DE Quantitative trait loci regulating relative lymphocyte proportions in mouse peripheral blood Blood 99(2) 561-566 Jan 2002 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11781239&dopt=Abstract 11781239 01 3-5 months 90 150 Male 3-4 % 60 64 49 38 58 61 44 61 55 67 53 34 44 60 9 48 58 39 44 69 53 56 52 49 61 46 58 46 42 54 44 43 49 63 50 6/9/2003 MK Sullivn MK Sullivan 11781239.01 Concurrence of peripheral blood CD4% [%] Relative proportions of peripheral blood (PB) B lymphocytes (B220%) as well as CD4 (CD4%) and CD8 (CD8%) T lymphocytes differ significantly among inbred mouse strains: B220% is high in C57BL/6J (B6) and C57BR/cdJ, intermediate in BALB/cByJ (BALB) and DBA/2J (D2), and low in NOD/LtJ (NOD) and SJL/J (SJL) mice, whereas CD4% and CD8% are high in NOD and SJL mice and low in the other 4 strains. By following segregating genetic markers linked to these traits in (B6 x D2) recombinant inbred (BXD RI) mice, the study defined 2 quantitative trait loci (QTLs) for the B220% phenotype: Pbbcp1 (peripheral blood B cell percentage 1, logarithm of odds [LOD] 4.1, P <.000 01) and Pbbcp2 (LOD 3.7, P <.000 04) on chromosome 1 (Chr 1) at about 63 cM and 48 cM; one suggestive locus for the CD4% phenotype (LOD 2.6, P <.000 57) on Chr 8 at about 73 cM; and one QTL for the CD8% phenotype: Pbctlp1 (peripheral blood cytotoxic T lymphocyte percentage 1, LOD 3.8, P <.000 02) on Chr 19 at about 12 cM. The study further segregated PB lymphocyte proportions in B6SJLF2 mice by using DNA markers adjacent to these mapped QTLs and found that the Pbbcp1 locus (LOD 5.6, P <.000 01) was also important in this mouse population. In both BXD RI and B6SJLF2 mice, QTLs regulating B-cell proportions showed no significant effect on T-cell proportions and vice versa. Thus, PB B- and T-lymphocyte proportions are regulated separately by different genetic elements. Chen J, Harrison DE Quantitative trait loci regulating relative lymphocyte proportions in mouse peripheral blood Blood 99(2) 561-566 Jan 2002 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11781239&dopt=Abstract 11781239 02 3-5 months 90 150 Male 3-4 % 20 9 25 18 14 14 18 16 12 6 16 19 11 10 25 13 19 15 20 11 11 10 15 16 7 12 12 20 18 16 21 18 19 11 12 6/9/2003 MK Sullivn MK Sullivan 11781239.02 Concurrence of peripheral blood CD8% [%] Relative proportions of peripheral blood (PB) B lymphocytes (B220%) as well as CD4 (CD4%) and CD8 (CD8%) T lymphocytes differ significantly among inbred mouse strains: B220% is high in C57BL/6J (B6) and C57BR/cdJ, intermediate in BALB/cByJ (BALB) and DBA/2J (D2), and low in NOD/LtJ (NOD) and SJL/J (SJL) mice, whereas CD4% and CD8% are high in NOD and SJL mice and low in the other 4 strains. By following segregating genetic markers linked to these traits in (B6 x D2) recombinant inbred (BXD RI) mice, the study defined 2 quantitative trait loci (QTLs) for the B220% phenotype: Pbbcp1 (peripheral blood B cell percentage 1, logarithm of odds [LOD] 4.1, P <.000 01) and Pbbcp2 (LOD 3.7, P <.000 04) on chromosome 1 (Chr 1) at about 63 cM and 48 cM; one suggestive locus for the CD4% phenotype (LOD 2.6, P <.000 57) on Chr 8 at about 73 cM; and one QTL for the CD8% phenotype: Pbctlp1 (peripheral blood cytotoxic T lymphocyte percentage 1, LOD 3.8, P <.000 02) on Chr 19 at about 12 cM. The study further segregated PB lymphocyte proportions in B6SJLF2 mice by using DNA markers adjacent to these mapped QTLs and found that the Pbbcp1 locus (LOD 5.6, P <.000 01) was also important in this mouse population. In both BXD RI and B6SJLF2 mice, QTLs regulating B-cell proportions showed no significant effect on T-cell proportions and vice versa. Thus, PB B- and T-lymphocyte proportions are regulated separately by different genetic elements. Chen J, Harrison DE Quantitative trait loci regulating relative lymphocyte proportions in mouse peripheral blood Blood 99(2) 561-566 Jan 2002 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11781239&dopt=Abstract 11781239 03 3-5 months 90 150 Male 3-4 % 7.7 6.1 11.5 9.0 6.4 11.7 7.1 7.1 5.6 2.5 7.5 14.6 7.1 6.4 25.4 6.9 10.0 9.0 8.0 4.5 13.5 6.9 11.7 11.7 6.7 5.4 8.4 7.3 15.7 9.6 14.9 15.7 9.0 7.3 7.6 6/9/2003 MK Sullivn MK Sullivan 11781239.03 Caudate putamen Drd2/3 receptor density binding of [125I] epidepride [fmol/mg] BACKGROUND It has not been established to what extent the natural variation in dopamine systems contribute to the variation in ethanol response. The current study addresses this issue by measuring D dopamine (DA) receptor binding, the expression of, the number of midbrain DA neurons in the BXD recombinant inbred (RI) series and then compares these strain means with those previously reported for a variety of ethanol and other drug-related phenotypes.(2)METHODS Data were collected for 21 to 23 of the BXD RI strains and the parental strains. D DA receptor autoradiography was performed using I-epidepride as the ligand [ Kanes S, Dains K, Cipp L, Gatley J, Hitzemann B, Rasmussen E, Sanderson S, Silverman S, Hitzemann R (1996) Mapping the genes for haloperidol-induced catalepsy. J Pharmacol Exp Ther 277:1016-1025]. expression was measured using the Affymetrix oligoarray system. Immunocytochemical techniques were used to determine the number of midbrain DA neurons [Hitzemann B, Dains K, Hitzemann R (1994) Further studies on the relationship between dopamine cell density and haloperidol response. J Pharmacol Exp Ther 271:969-976].(2)RESULTS AND CONCLUSIONS The range of difference in receptor binding for the RI strains was approximately 2-fold in all regions examined, the core, the shell of the nucleus accumbens (NAc) and the dorsomedial caudate-putamen (CPu); heritability in all regions was moderate-( 2 approximately 0.35). expression in forebrain samples from the RI and parental strains ranged 1.5- to 2-fold and was moderate-0.47. Variation in the number of tyrosine hydroxylase (TH) positive neurons was moderate, 41% and 26% and was low-0.19 and 0.15 for the ventral tegmental area (VTA) and substantia nigra compacta (SNc), respectively. Significant correlations were found between D DA receptor binding and the low dose (1.33 g/kg) ethanol stimulant response. ( < 0.002) and between expression and conditioned place preference (CPP) ( < 0.0005). No significant correlations were detected between ethanol preference and either receptor binding or expression; however, a significant correlation was found between preference and expression. is approximately 0.2 Mb from. Overall, the data suggest ethanol preference and CPP are associated with the expression of or closely linked genetic loci.(2) Hitzemann R, Hitzemann B, Rivera S, Gatley J, Thanos P, Siming Shou LL, Williams RW Dopamine D2 receptor binding, Drd2 Expression and the number of dopamine neurons in the BXD recombinant inbred series: genetic relationships to alcohol and other drug associated phenotypes Alcohol Clin Exp Res 27(1) 1-11 Jan 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12543998&dopt=Abstract 12543998 01 Male 10-15 fmol/mg 311 17.7 304 20.9 278 62.9 295 44.6 253 29.4 250 50.3 263 29.4 261 18.6 240 34.3 213 30.0 267 20.6 268 27.4 235 23.7 175 37.7 235 58.9 263 32.3 238 54.0 167 35.4 269 27.1 264 52.9 218 32.6 295 59.4 281 70.9 199 22.6 12543998.01 Nucleus accumbens core Drd2/3 receptor density binding of [125I] epidepride [fmol/mg] BACKGROUND It has not been established to what extent the natural variation in dopamine systems contribute to the variation in ethanol response. The current study addresses this issue by measuring D dopamine (DA) receptor binding, the expression of, the number of midbrain DA neurons in the BXD recombinant inbred (RI) series and then compares these strain means with those previously reported for a variety of ethanol and other drug-related phenotypes.(2)METHODS Data were collected for 21 to 23 of the BXD RI strains and the parental strains. D DA receptor autoradiography was performed using I-epidepride as the ligand [ Kanes S, Dains K, Cipp L, Gatley J, Hitzemann B, Rasmussen E, Sanderson S, Silverman S, Hitzemann R (1996) Mapping the genes for haloperidol-induced catalepsy. J Pharmacol Exp Ther 277:1016-1025]. expression was measured using the Affymetrix oligoarray system. Immunocytochemical techniques were used to determine the number of midbrain DA neurons [Hitzemann B, Dains K, Hitzemann R (1994) Further studies on the relationship between dopamine cell density and haloperidol response. J Pharmacol Exp Ther 271:969-976].(2)RESULTS AND CONCLUSIONS The range of difference in receptor binding for the RI strains was approximately 2-fold in all regions examined, the core, the shell of the nucleus accumbens (NAc) and the dorsomedial caudate-putamen (CPu); heritability in all regions was moderate-( 2 approximately 0.35). expression in forebrain samples from the RI and parental strains ranged 1.5- to 2-fold and was moderate-0.47. Variation in the number of tyrosine hydroxylase (TH) positive neurons was moderate, 41% and 26% and was low-0.19 and 0.15 for the ventral tegmental area (VTA) and substantia nigra compacta (SNc), respectively. Significant correlations were found between D DA receptor binding and the low dose (1.33 g/kg) ethanol stimulant response. ( < 0.002) and between expression and conditioned place preference (CPP) ( < 0.0005). No significant correlations were detected between ethanol preference and either receptor binding or expression; however, a significant correlation was found between preference and expression. is approximately 0.2 Mb from. Overall, the data suggest ethanol preference and CPP are associated with the expression of or closely linked genetic loci.(2) Hitzemann R, Hitzemann B, Rivera S, Gatley J, Thanos P, Siming Shou LL, Williams RW Dopamine D2 receptor binding, Drd2 Expression and the number of dopamine neurons in the BXD recombinant inbred series: genetic relationships to alcohol and other drug associated phenotypes Alcohol Clin Exp Res 27(1) 1-11 Jan 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12543998&dopt=Abstract 12543998 02 Male 10-15 fmol/mg 238 7.2 228 10.5 253 102.3 214 32.6 184 25.1 196 38.1 213 31.2 228 21.2 222 26.0 174 29.8 212 19.1 202 23.5 210 23.3 143 37.0 208 47.1 237 27.7 190 44.2 127 32.1 197 21.2 198 45.6 168 25.1 193 37.4 194 44.7 163 28.4 12543998.02 Nucleus accumbens shell Drd 2/3 receptor density binding of [125I] epidepride [fmol/mg] BACKGROUND It has not been established to what extent the natural variation in dopamine systems contribute to the variation in ethanol response. The current study addresses this issue by measuring D dopamine (DA) receptor binding, the expression of, the number of midbrain DA neurons in the BXD recombinant inbred (RI) series and then compares these strain means with those previously reported for a variety of ethanol and other drug-related phenotypes.(2)METHODS Data were collected for 21 to 23 of the BXD RI strains and the parental strains. D DA receptor autoradiography was performed using I-epidepride as the ligand [ Kanes S, Dains K, Cipp L, Gatley J, Hitzemann B, Rasmussen E, Sanderson S, Silverman S, Hitzemann R (1996) Mapping the genes for haloperidol-induced catalepsy. J Pharmacol Exp Ther 277:1016-1025]. expression was measured using the Affymetrix oligoarray system. Immunocytochemical techniques were used to determine the number of midbrain DA neurons [Hitzemann B, Dains K, Hitzemann R (1994) Further studies on the relationship between dopamine cell density and haloperidol response. J Pharmacol Exp Ther 271:969-976].(2)RESULTS AND CONCLUSIONS The range of difference in receptor binding for the RI strains was approximately 2-fold in all regions examined, the core, the shell of the nucleus accumbens (NAc) and the dorsomedial caudate-putamen (CPu); heritability in all regions was moderate-( 2 approximately 0.35). expression in forebrain samples from the RI and parental strains ranged 1.5- to 2-fold and was moderate-0.47. Variation in the number of tyrosine hydroxylase (TH) positive neurons was moderate, 41% and 26% and was low-0.19 and 0.15 for the ventral tegmental area (VTA) and substantia nigra compacta (SNc), respectively. Significant correlations were found between D DA receptor binding and the low dose (1.33 g/kg) ethanol stimulant response. ( < 0.002) and between expression and conditioned place preference (CPP) ( < 0.0005). No significant correlations were detected between ethanol preference and either receptor binding or expression; however, a significant correlation was found between preference and expression. is approximately 0.2 Mb from. Overall, the data suggest ethanol preference and CPP are associated with the expression of or closely linked genetic loci.(2) Hitzemann R, Hitzemann B, Rivera S, Gatley J, Thanos P, Siming Shou LL, Williams RW Dopamine D2 receptor binding, Drd2 Expression and the number of dopamine neurons in the BXD recombinant inbred series: genetic relationships to alcohol and other drug associated phenotypes Alcohol Clin Exp Res 27(1) 1-11 Jan 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12543998&dopt=Abstract 12543998 03 Male 10-15 fmol/mg 268 8.5 242 17.9 264 89.1 223 36.8 181 32.3 195 40.3 206 31.5 213 28.8 216 27.5 171 34.1 203 26.7 196 23.5 212 30.7 144 38.9 210 48.0 239 30.9 179 44.0 128 22.9 189 25.6 181 48.8 173 25.3 186 43.2 187 46.7 161 17.8 12543998.03 Brain methamphetamine levels after 4 mg/kg methamphetamine [micrograms/gm] Individual differences in most behavioral and pharmacological responses to abused drugs are dependent on both genetic and environmental factors. The genetic influences on the complex phenotypes related to drug abuse have been difficult to study using classical genetic analyses. Quantitative trait locus (QTL) mapping is a method that has been used successfully to examine genetic contributions to some of these traits by correlating allelic variation in polymorphic genetic markers of known chromosomal location with variation in drug-response phenotypes. We evaluated several behavioral responses to multiple doses of methamphetamine (METH) in C57BL/6J (B6), DBA/2J (D2), and 25 of their recombinant inbred (BXD RI) strains. Stereotyped chewing, horizontal home cage activity, and changes in body temperature after 0, 4, 8, or 16 mg/kg METH, as well as stereotyped climbing behavior after 16 mg/kg METH, were examined. Associations (p < 0.01) between METH sensitivity and allelic status at multiple microsatellite genetic markers were subsequently determined for each response. QTLs were provisionally identified for each phenotype, some unique to a particular behavior and others that appeared to influence multiple phenotypes. Candidate genes suggested by these analyses included several that mapped near genes relevant for the neurotransmitters acetylcholine and glutamate. The locations of QTLs provisionally identified by this analysis were compared with QTLs hypothesized in other studies to influence methamphetamine- and cocaine-related phenotypes. In several instances, QTLs appeared to overlap, which is consistent with idea that common neural substrates underlie some responses to psychostimulants. Grisel JE, Belknap JK, O'Toole LA, Helms ML, Wenger CD, Crabbe JC. Quantitative trait loci affecting methamphetamine responses in BXD recombinant inbred mouse strains. J Neurosci 17(2) 745-754 Jan 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8987796&dopt=Abstract 8987796 98007483 11 10-14 wks 70 98 MF 8 micrograms/gm 0.5 0.12 0.8 0.17 1.1 0.26 0.5 0.12 0.7 0.10 0.7 0.14 0.9 0.22 0.5 0.13 0.5 0.17 0.8 0.29 0.8 0.11 1.1 0.28 0.9 0.17 0.5 0.15 0.2 0.07 0.8 0.25 0.6 0.10 0.6 0.21 0.7 0.20 0.5 0.14 0.5 0.10 0.8 0.30 0.5 0.13 0.4 0.11 0.4 0.10 1.4 0.33 0.8 0.26 6/4/2003 MK Sullivan 8987796.11 54 degree C hot plate latencies baseline and post swim in maximum possible effect [%MPE=(postswim-baseline)/(cut-off-baseline)*100)]- MF [seconds] It is increasingly appreciated that the sexes differ in their perception of noxious stimuli and in their responsivity to exogenous and endogenous analgesic manipulations. We previously reported the existence of qualitative sex differences in the neurochemical mediation of nonopioid (i.e., naloxone-insensitive) stress-induced analgesia (SIA) produced by forced swims and suggested that female mice possess a sex-specific SIA mechanism. This female-specific system is now known to be estrogen-dependent, to be ontogenetically organized, and to vary with reproductive status; however, its neurochemical identity remains obscure. In an attempt to identify candidate genes underlying SIA in both sexes, we performed a two-phase quantitative trait locus (QTL) mapping experiment using the BXD/Ty recombinant inbred (RI) set derived from DBA/2J (D2) and C57BL/6J (B6) inbred mouse strains and (B6xD2)F2 hybrid mice derived from these same progenitors. All mice were subjected to 3 min forced swims in 15 degrees C water; nociceptive sensitivity on the 54 degrees C hot-plate assay was assessed immediately before and 2 min after cessation of the swim. We report the localization of a QTL statistically associated with SIA magnitude [p = 0.00000012; logarithm of the odds (LOD) = 6.1] in female mice only. This female-specific QTL, which we name Fsia1, is located on chromosome 8 at 52-84 cM from the centromere and accounts for 17-26% of the overall trait variance in this sex. The present data provide further evidence of the existence of a female-specific SIA mechanism and highlight the important role of both genetic background and gender in the inhibition of pain. Mogil JS, Richards SP, O'Toole LA, Helms ML, Mitchell SR, Kest B, Belknap JK. Identification of a sex-specific quantitative trait locus mediating nonopioid stress-induced analgesia in female mice J Neurosci 17(20) 7995-8002 Oct 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9315917&dopt=Abstract 9315917 97461641 07 8-12 wks 56 96 MF 9-26 % MPE 68.7 9.50 52.2 10.20 95.0 3.23 34.3 8.42 74.3 10.70 78.6 6.54 79.5 8.81 90.4 6.52 83.6 7.33 82.9 6.98 100.0 0.63 41.6 10.00 64.3 8.19 77.0 7.46 77.2 7.88 40.1 6.80 6.28 14.91 50.3 8.75 86.5 7.08 87.2 5.29 79.2 7.35 39.8 8.83 41.9 10.80 25.5 8.25 59.5 7.00 7/3/2003 MK Sullivan 9315917.07 54 degree C hot plate latencies baseline and post swim in maximum possible effect [%MPE=(postswim-baseline)/(cut-off-baseline)*100)]- Female [seconds] It is increasingly appreciated that the sexes differ in their perception of noxious stimuli and in their responsivity to exogenous and endogenous analgesic manipulations. We previously reported the existence of qualitative sex differences in the neurochemical mediation of nonopioid (i.e., naloxone-insensitive) stress-induced analgesia (SIA) produced by forced swims and suggested that female mice possess a sex-specific SIA mechanism. This female-specific system is now known to be estrogen-dependent, to be ontogenetically organized, and to vary with reproductive status; however, its neurochemical identity remains obscure. In an attempt to identify candidate genes underlying SIA in both sexes, we performed a two-phase quantitative trait locus (QTL) mapping experiment using the BXD/Ty recombinant inbred (RI) set derived from DBA/2J (D2) and C57BL/6J (B6) inbred mouse strains and (B6xD2)F2 hybrid mice derived from these same progenitors. All mice were subjected to 3 min forced swims in 15 degrees C water; nociceptive sensitivity on the 54 degrees C hot-plate assay was assessed immediately before and 2 min after cessation of the swim. We report the localization of a QTL statistically associated with SIA magnitude [p = 0.00000012; logarithm of the odds (LOD) = 6.1] in female mice only. This female-specific QTL, which we name Fsia1, is located on chromosome 8 at 52-84 cM from the centromere and accounts for 17-26% of the overall trait variance in this sex. The present data provide further evidence of the existence of a female-specific SIA mechanism and highlight the important role of both genetic background and gender in the inhibition of pain. Mogil JS, Richards SP, O'Toole LA, Helms ML, Mitchell SR, Kest B, Belknap JK. Identification of a sex-specific quantitative trait locus mediating nonopioid stress-induced analgesia in female mice J Neurosci 17(20) 7995-8002 Oct 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9315917&dopt=Abstract 9315917 97461641 08 8-12 wks 56 96 Female 3-10 % MPE 67.8 9.50 47.2 10.20 95.3 3.23 26.2 8.42 81.5 10.70 80.0 6.54 83.8 8.81 86.2 6.52 88.2 7.33 82.3 6.98 99.7 0.63 33.8 10.00 55.2 8.19 77.7 7.46 68.7 7.88 43.9 6.80 40.3 14.91 41.2 8.75 94.0 7.08 99.7 5.29 71.4 7.35 38.5 8.83 28.3 10.80 5.6 8.25 65.9 7.00 7/3/2003 MK Sullivan 9315917.08 54 degree C hot plate latencies baseline and post swim in maximum possible effect [%MPE=(postswim-baseline)/(cut-off-baseline)*100)]- Male [seconds] It is increasingly appreciated that the sexes differ in their perception of noxious stimuli and in their responsivity to exogenous and endogenous analgesic manipulations. We previously reported the existence of qualitative sex differences in the neurochemical mediation of nonopioid (i.e., naloxone-insensitive) stress-induced analgesia (SIA) produced by forced swims and suggested that female mice possess a sex-specific SIA mechanism. This female-specific system is now known to be estrogen-dependent, to be ontogenetically organized, and to vary with reproductive status; however, its neurochemical identity remains obscure. In an attempt to identify candidate genes underlying SIA in both sexes, we performed a two-phase quantitative trait locus (QTL) mapping experiment using the BXD/Ty recombinant inbred (RI) set derived from DBA/2J (D2) and C57BL/6J (B6) inbred mouse strains and (B6xD2)F2 hybrid mice derived from these same progenitors. All mice were subjected to 3 min forced swims in 15 degrees C water; nociceptive sensitivity on the 54 degrees C hot-plate assay was assessed immediately before and 2 min after cessation of the swim. We report the localization of a QTL statistically associated with SIA magnitude [p = 0.00000012; logarithm of the odds (LOD) = 6.1] in female mice only. This female-specific QTL, which we name Fsia1, is located on chromosome 8 at 52-84 cM from the centromere and accounts for 17-26% of the overall trait variance in this sex. The present data provide further evidence of the existence of a female-specific SIA mechanism and highlight the important role of both genetic background and gender in the inhibition of pain. Mogil JS, Richards SP, O'Toole LA, Helms ML, Mitchell SR, Kest B, Belknap JK. Identification of a sex-specific quantitative trait locus mediating nonopioid stress-induced analgesia in female mice J Neurosci 17(20) 7995-8002 Oct 1997 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9315917&dopt=Abstract 9315917 97461641 09 8-12 wks 56 96 Male 4-18 % MPE 71.0 9.50 58.3 10.20 96.5 3.23 43.2 8.42 66.9 10.70 77.6 6.54 76.4 8.81 60.1 6.52 79.3 7.33 84.6 6.98 102.0 0.63 50.0 10.00 74.6 8.19 78.7 7.46 84.3 7.88 37.7 6.80 75.5 14.91 60.4 8.75 81.8 7.08 76.5 5.29 88.4 7.35 41.5 8.83 57.8 10.80 45.0 8.25 54.5 7.00 7/3/2003 MK Sullivan 9315917.09 TRBV4+ T cell levels among CD8+ T cells in spleen [%] The murine gamma-herpesvirus, MHV-68, shares important biological and genetic features with the human gamma-herpesvirus, Epstein-Barr virus. Following intranasal infection, mice develop an infectious mononucleosis-like syndrome accompanied by increased numbers of activated CD8+ T cells in the blood. A consistent feature of the CD8+ T-cell activation is a marked increase in the frequency of cells expressing a TRBV4+ T-cell receptor. Previous studies suggested that the magnitude of TRBV4 expansion varied significantly among mouse strains, and was influenced by both MHC and non-MHC genes. Detailed analysis of strains with high (C57BL/6) or low (DBA/2) TRBV4 CD8+ T-cell expansion showed that differences in the degree of expansion were not a consequence of variation in genetic susceptibility to the viral infection. Rather, the magnitude of the TRBV4 CD8+ T-cell expansion correlated with differences in expression of the unidentified stimulatory ligand on activated, latently infected B cells. In the present study, analysis of TRBV4 expansion in C57BL/6, DBA/2, B6D2 F1 mice, BXD recombinant inbred strains, and the progeny of C57BL/6xDBA/2 F1 hybrids backcrossed to C57BL/6 demonstrated strong cumulative dominance of the low DBA/2 trait and moderately high heritability (h2 approximately 0.5). Two quantitative trait loci (QTLs) strongly associated with variance in TRBV4 expansion were identified using simple and composite mapping procedures. The first QTL is located on Chromosome (Chr) 17, near or proximal to H2. The second QTL is located on Chr 6 in a region spanning the Tcrb and Cd8a loci. Hardy CL, Lu L, Nguyen P, Woodland DL, Williams RW, Blackman MA Identification of quantitative trait loci controlling activation of TRBV4 CD8+ cells during murine gamma-herpesvirus-induced infectious mononucleosis Immunogenetics 53(5) 395-400 Jul 2001 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11486276&dopt=Abstract 11486276 01 8-12 wks 56 84 Female % 36.6 10.72 11.5 3.56 24.5 4.48 37.1 4.84 28.3 11.81 18.4 7.09 13.2 0 30.8 15.30 20.6 3.50 11.7 1.48 12.9 2.76 27.4 9.16 36.6 0 7.6 4.88 11.6 0.60 28.0 11.90 37.8 1.84 17.5 2.06 20.2 2.52 27.0 2.80 18.4 7.79 17.0 0.64 14.1 2.09 40.0 7.91 10.0 0.97 24.3 10.64 34.9 1.17 6/18/2003 MK Sullivan MK Sullivan 11486276.01 TRBV4+ T cell levels among CD*+ T cells in peripheral blood [%] The murine gamma-herpesvirus, MHV-68, shares important biological and genetic features with the human gamma-herpesvirus, Epstein-Barr virus. Following intranasal infection, mice develop an infectious mononucleosis-like syndrome accompanied by increased numbers of activated CD8+ T cells in the blood. A consistent feature of the CD8+ T-cell activation is a marked increase in the frequency of cells expressing a TRBV4+ T-cell receptor. Previous studies suggested that the magnitude of TRBV4 expansion varied significantly among mouse strains, and was influenced by both MHC and non-MHC genes. Detailed analysis of strains with high (C57BL/6) or low (DBA/2) TRBV4 CD8+ T-cell expansion showed that differences in the degree of expansion were not a consequence of variation in genetic susceptibility to the viral infection. Rather, the magnitude of the TRBV4 CD8+ T-cell expansion correlated with differences in expression of the unidentified stimulatory ligand on activated, latently infected B cells. In the present study, analysis of TRBV4 expansion in C57BL/6, DBA/2, B6D2 F1 mice, BXD recombinant inbred strains, and the progeny of C57BL/6xDBA/2 F1 hybrids backcrossed to C57BL/6 demonstrated strong cumulative dominance of the low DBA/2 trait and moderately high heritability (h2 approximately 0.5). Two quantitative trait loci (QTLs) strongly associated with variance in TRBV4 expansion were identified using simple and composite mapping procedures. The first QTL is located on Chromosome (Chr) 17, near or proximal to H2. The second QTL is located on Chr 6 in a region spanning the Tcrb and Cd8a loci. Hardy CL, Lu L, Nguyen P, Woodland DL, Williams RW, Blackman MA Identification of quantitative trait loci controlling activation of TRBV4 CD8+ cells during murine gamma-herpesvirus-induced infectious mononucleosis Immunogenetics 53(5) 395-400 Jul 2001 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11486276&dopt=Abstract 11486276 02 8-12 wks 56 84 Female % 44.5 11.96 11.4 1.84 29.3 5.58 27.8 15.83 32.4 10.72 27.9 10.81 18.4 3.18 24.7 12.61 18.9 3.78 15.5 1.80 10.9 3.54 15.6 5.84 33.4 0 34.3 5.10 11.2 3.26 32.5 10.90 17.6 4.80 21.5 1.48 23.0 3.47 32.0 4.16 21.6 10.96 19.6 1.44 8.5 2.16 30.2 5.58 12.2 1.47 26.3 13.0 39.4 0.71 6/18/2003 MK Sullivan MK Sullivan 11486276.02 Absolute number of lin-Sca1++ cells [cell number] Quantitative trait analysis may shed light on mechanisms regulating hematopoiesis in vivo. Strain-dependent variation existed among C57BL/6 (B6), DBA/2, and BXD recombinant inbred mice in the responsiveness of primitive progenitor cells to the early-acting cytokines kit ligand, flt3 ligand, and thrombopoietin. A significant quantitative trait locus was found on chromosome 2Êthat could not be confirmed in congenic mice, however, probably because of epistasis. Because it has been shown that alleles of unknown X-linked genes confer a selective advantage to hematopoietic stem cells in vivo in humans and in cats, we also analyzed reciprocal male D2B6F1 and B6D2F1 mice, revealing an X-linked locus regulating the responsiveness of progenitor and stem cells to early-acting factors. Among DBA/2, B6, and BXD recombinant inbred mice, correlating genetic variation was found in the absolute number and frequency of LinSca1++kit+ cells, which are highly enriched in hematopoietic progenitor and stem cells, and in the number of LinSca1++kit cells, a population whose biologic significance is unknown, suggesting that both populations are functionally related. Suggestive quantitative trait loci (QTLs) for the number of LinSca1++ cells on chromosomes 2,Ê4,Êand 7Êwere confirmed in successive rounds of mapping. The locus on chromosome 2Êwas confirmed in congenic mice. We thus demonstrated genetic variation in the response to cytokines critical for hematopoiesis in vivo and in the pool size of cells belonging to a phenotype used to isolate essentially pure primitive progenitor and stem cells, and we identified loci that may be relevant to the regulation of hematopoiesis in steady state. Henckaerts E, Geiger H, Langer JC, Rebollo P, Van Zant G, Snoeck HW Genetically determined variation in the number of phenotypically defined progenitor and stem cells and in their response to early-acting cytokines Blood 99(11) 3947-3954 Jun 2002 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12010793&dopt=Abstract 12010793 02 6-8 wks 42 56 Female 3 cell number 3898 491 1469 316 5048 819 721 86 2798 261 2602 0 1348 0 3216 315 3864 0 5114 0 4468 807 3782 0 6832 0 1909 0 1508 0 3693 330 1489 0 983 0 852 0 2761 0 6472 447 1223 0 2000 0 4045 545 3180 0 2278 516 1563 0 2600 341 7/1/2003 MK Sullivan MK Sullivan 12010793.02 Relative fraction of lin-Sca1++ cells [%] Quantitative trait analysis may shed light on mechanisms regulating hematopoiesis in vivo. Strain-dependent variation existed among C57BL/6 (B6), DBA/2, and BXD recombinant inbred mice in the responsiveness of primitive progenitor cells to the early-acting cytokines kit ligand, flt3 ligand, and thrombopoietin. A significant quantitative trait locus was found on chromosome 2Êthat could not be confirmed in congenic mice, however, probably because of epistasis. Because it has been shown that alleles of unknown X-linked genes confer a selective advantage to hematopoietic stem cells in vivo in humans and in cats, we also analyzed reciprocal male D2B6F1 and B6D2F1 mice, revealing an X-linked locus regulating the responsiveness of progenitor and stem cells to early-acting factors. Among DBA/2, B6, and BXD recombinant inbred mice, correlating genetic variation was found in the absolute number and frequency of LinSca1++kit+ cells, which are highly enriched in hematopoietic progenitor and stem cells, and in the number of LinSca1++kit cells, a population whose biologic significance is unknown, suggesting that both populations are functionally related. Suggestive quantitative trait loci (QTLs) for the number of LinSca1++ cells on chromosomes 2,Ê4,Êand 7Êwere confirmed in successive rounds of mapping. The locus on chromosome 2Êwas confirmed in congenic mice. We thus demonstrated genetic variation in the response to cytokines critical for hematopoiesis in vivo and in the pool size of cells belonging to a phenotype used to isolate essentially pure primitive progenitor and stem cells, and we identified loci that may be relevant to the regulation of hematopoiesis in steady state. Henckaerts E, Geiger H, Langer JC, Rebollo P, Van Zant G, Snoeck HW Genetically determined variation in the number of phenotypically defined progenitor and stem cells and in their response to early-acting cytokines Blood 99(11) 3947-3954 Jun 2002 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12010793&dopt=Abstract 12010793 03 6-8 wks 42 56 Female 3 % 0.376 0 0.149 0.028 0.747 0 0.128 0 0.438 0.057 0.277 0 0.201 0 0.352 0.070 0.579 0 0.460 0.120 0.316 0 0.495 0 0.600 0.126 0.201 0 0.189 0 0.606 0.035 0.297 0.039 0.165 0 0.201 0 0.270 0.072 0.652 0 0.180 0 0.379 0 0.738 0.146 0.579 0 0.264 0.077 0.229 0.040 0.338 0.066 7/1/2003 MK Sullivan MK Sullivan 12010793.03 C-kit+ cells among lin-Sca1++ cells [%] Quantitative trait analysis may shed light on mechanisms regulating hematopoiesis in vivo. Strain-dependent variation existed among C57BL/6 (B6), DBA/2, and BXD recombinant inbred mice in the responsiveness of primitive progenitor cells to the early-acting cytokines kit ligand, flt3 ligand, and thrombopoietin. A significant quantitative trait locus was found on chromosome 2Êthat could not be confirmed in congenic mice, however, probably because of epistasis. Because it has been shown that alleles of unknown X-linked genes confer a selective advantage to hematopoietic stem cells in vivo in humans and in cats, we also analyzed reciprocal male D2B6F1 and B6D2F1 mice, revealing an X-linked locus regulating the responsiveness of progenitor and stem cells to early-acting factors. Among DBA/2, B6, and BXD recombinant inbred mice, correlating genetic variation was found in the absolute number and frequency of LinSca1++kit+ cells, which are highly enriched in hematopoietic progenitor and stem cells, and in the number of LinSca1++kit cells, a population whose biologic significance is unknown, suggesting that both populations are functionally related. Suggestive quantitative trait loci (QTLs) for the number of LinSca1++ cells on chromosomes 2,Ê4,Êand 7Êwere confirmed in successive rounds of mapping. The locus on chromosome 2Êwas confirmed in congenic mice. We thus demonstrated genetic variation in the response to cytokines critical for hematopoiesis in vivo and in the pool size of cells belonging to a phenotype used to isolate essentially pure primitive progenitor and stem cells, and we identified loci that may be relevant to the regulation of hematopoiesis in steady state. Henckaerts E, Geiger H, Langer JC, Rebollo P, Van Zant G, Snoeck HW Genetically determined variation in the number of phenotypically defined progenitor and stem cells and in their response to early-acting cytokines Blood 99(11) 3947-3954 Jun 2002 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12010793&dopt=Abstract 12010793 04 8-10 wks 56 70 Female 3 % 22.1 0.91 25.0 10.52 0.6 0 19.9 0 20.8 0 17.0 4.02 16.0 0 24.2 0 11.5 0 29.0 0.91 20.4 5.98 29.6 5.42 30.5 5.76 37.6 4.55 27.3 0 19.7 3.18 1.74 0 10.6 3.33 7/1/2003 MK Sullivan MK Sullivan 12010793.04 Adjusted cerebellum weight [mg] To discover genes influencing cerebellum development, we conducted a complex trait analysis of variation in the size of the adult mouse cerebellum. We analyzed two sets of recombinant inbred BXD strains and an F2 intercross of the common inbred strains, C57BL/6J and DBA/2J. We measured cerebellar size as the weight or volume of fixed or histologically processed tissue. Among BXD recombinant inbred strains, the cerebellum averages 52 mg (12.4% of the brain) and ranges 18 mg in size. In F2 mice, the cerebellum averages 62 mg (12.9% of the brain) and ranges approximately 20 mg in size. Five quantitative trait loci (QTLs) that significantly control variation in cerebellar size were mapped to chromosomes 1 (Cbs1a), 8 (Cbs8a), 14 (Cbs14a), and 19 (Cbs19a, Cbs19b). In combination, these QTLs can shift cerebellar size an appreciable 35% of the observed range. To assess regional genetic control of the cerebellum, we also measured the volume of the cell-rich, internal granule layer (IGL) in a set of BXD strains. The IGL ranges from 34 to 43% of total cerebellar volume. The QTL Cbs8a is significantly linked to variation in IGL volume and is suggestively linked to variation in the number of cerebellar folia. The QTLs we have discovered are among the first loci shown to modulate the size and architecture of the adult mouse cerebellum. Airey DC, Lu L, Williams RW. Genetic control of the mouse cerebellum: identification of quantitative trait loci modulating size and architecture. J Neurosci 21(14) 5099-5109 Jul 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11438585&dopt=Abstract 11438585 02 30-300 days 30 300 MF 4-7 mg 54.1 0.95 50.1 0.71 53.3 1.01 55.1 0.71 57.3 0.32 51.2 0.99 53.6 0.79 46.8 0.83 50.6 0.65 49.3 0.44 45.7 0.38 52.5 0.68 52.0 0.68 51.1 0.62 52.4 0.75 49.0 0.77 51.6 0.64 50.7 0.34 55.5 1.18 52.6 0.33 53.1 0.61 53.5 0.58 53.2 0.30 58.7 0.79 50.8 0.58 53.3 0.98 51.9 0.57 54.1 0.68 52.3 0.75 46.1 0.30 51.8 0.78 57.0 0.46 48.6 0.43 56.6 0.25 6/19/2003 MK Sullivan MK Sullivan 11438585.02 Brain weight [mg] To discover genes influencing cerebellum development, we conducted a complex trait analysis of variation in the size of the adult mouse cerebellum. We analyzed two sets of recombinant inbred BXD strains and an F2 intercross of the common inbred strains, C57BL/6J and DBA/2J. We measured cerebellar size as the weight or volume of fixed or histologically processed tissue. Among BXD recombinant inbred strains, the cerebellum averages 52 mg (12.4% of the brain) and ranges 18 mg in size. In F2 mice, the cerebellum averages 62 mg (12.9% of the brain) and ranges approximately 20 mg in size. Five quantitative trait loci (QTLs) that significantly control variation in cerebellar size were mapped to chromosomes 1 (Cbs1a), 8 (Cbs8a), 14 (Cbs14a), and 19 (Cbs19a, Cbs19b). In combination, these QTLs can shift cerebellar size an appreciable 35% of the observed range. To assess regional genetic control of the cerebellum, we also measured the volume of the cell-rich, internal granule layer (IGL) in a set of BXD strains. The IGL ranges from 34 to 43% of total cerebellar volume. The QTL Cbs8a is significantly linked to variation in IGL volume and is suggestively linked to variation in the number of cerebellar folia. The QTLs we have discovered are among the first loci shown to modulate the size and architecture of the adult mouse cerebellum. Airey DC, Lu L, Williams RW. Genetic control of the mouse cerebellum: identification of quantitative trait loci modulating size and architecture. J Neurosci 21(14) 5099-5109 Jul 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11438585&dopt=Abstract 11438585 03 30-300 days 30 300 MF 4-7 mg 483 20.3 403 8.6 501 13.0 403 5.0 438 22.9 448 9.6 408 5.8 405 16.9 392 12.9 414 6.6 437 14.2 450 6.8 429 11.9 409 15.9 374 13.3 437 8.7 435 12.3 394 8.1 408 9.6 385 4.9 359 16.2 394 4.3 385 4.5 365 6.2 403 8.5 439 6.0 445 3.0 439 5.2 417 14.4 427 6.3 436 9.6 423 5.3 455 8.2 469 7.0 6/19/2003 MK Sullivan MK Sullivan 11438585.03 Cerebellum volume [mm3] To discover genes influencing cerebellum development, we conducted a complex trait analysis of variation in the size of the adult mouse cerebellum. We analyzed two sets of recombinant inbred BXD strains and an F2 intercross of the common inbred strains, C57BL/6J and DBA/2J. We measured cerebellar size as the weight or volume of fixed or histologically processed tissue. Among BXD recombinant inbred strains, the cerebellum averages 52 mg (12.4% of the brain) and ranges 18 mg in size. In F2 mice, the cerebellum averages 62 mg (12.9% of the brain) and ranges approximately 20 mg in size. Five quantitative trait loci (QTLs) that significantly control variation in cerebellar size were mapped to chromosomes 1 (Cbs1a), 8 (Cbs8a), 14 (Cbs14a), and 19 (Cbs19a, Cbs19b). In combination, these QTLs can shift cerebellar size an appreciable 35% of the observed range. To assess regional genetic control of the cerebellum, we also measured the volume of the cell-rich, internal granule layer (IGL) in a set of BXD strains. The IGL ranges from 34 to 43% of total cerebellar volume. The QTL Cbs8a is significantly linked to variation in IGL volume and is suggestively linked to variation in the number of cerebellar folia. The QTLs we have discovered are among the first loci shown to modulate the size and architecture of the adult mouse cerebellum. Airey DC, Lu L, Williams RW. Genetic control of the mouse cerebellum: identification of quantitative trait loci modulating size and architecture. J Neurosci 21(14) 5099-5109 Jul 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11438585&dopt=Abstract 11438585 04 30-300 days 30 300 MF 4-8 mm3 49.8 2.32 45.5 1.23 62.9 3.55 55.1 1.64 47.3 1.10 50.6 1.21 43.8 1.75 47.9 1.18 47.1 1.71 44.5 0.87 47.5 2.23 46.4 1.16 43.2 0.96 50.4 1.47 43.1 1.21 50.7 3.52 45.1 1.05 43.5 2.00 47.7 1.90 40.9 2.35 47.9 2.11 46.0 1.81 55.1 3.66 48.2 3.13 50.4 2.85 46.9 1.96 40.9 1.29 45.5 2.46 50.6 1.64 44.9 3.90 53.4 1.37 6/19/2003 MK Sullivan MK Sullivan 11438585.04 Adjusted cerebellum volume [mm3] To discover genes influencing cerebellum development, we conducted a complex trait analysis of variation in the size of the adult mouse cerebellum. We analyzed two sets of recombinant inbred BXD strains and an F2 intercross of the common inbred strains, C57BL/6J and DBA/2J. We measured cerebellar size as the weight or volume of fixed or histologically processed tissue. Among BXD recombinant inbred strains, the cerebellum averages 52 mg (12.4% of the brain) and ranges 18 mg in size. In F2 mice, the cerebellum averages 62 mg (12.9% of the brain) and ranges approximately 20 mg in size. Five quantitative trait loci (QTLs) that significantly control variation in cerebellar size were mapped to chromosomes 1 (Cbs1a), 8 (Cbs8a), 14 (Cbs14a), and 19 (Cbs19a, Cbs19b). In combination, these QTLs can shift cerebellar size an appreciable 35% of the observed range. To assess regional genetic control of the cerebellum, we also measured the volume of the cell-rich, internal granule layer (IGL) in a set of BXD strains. The IGL ranges from 34 to 43% of total cerebellar volume. The QTL Cbs8a is significantly linked to variation in IGL volume and is suggestively linked to variation in the number of cerebellar folia. The QTLs we have discovered are among the first loci shown to modulate the size and architecture of the adult mouse cerebellum. Airey DC, Lu L, Williams RW. Genetic control of the mouse cerebellum: identification of quantitative trait loci modulating size and architecture. J Neurosci 21(14) 5099-5109 Jul 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11438585&dopt=Abstract 11438585 05 30-300 days 30 300 MF 4-8 mm3 46.0 1.89 44.9 1.42 52.5 3.41 54.3 1.87 45.8 1.02 49.0 1.01 42.6 1.30 48.3 1.09 45.0 1.64 41.6 0.80 47.8 2.06 45.8 0.64 45.8 0.83 48.0 1.03 43.9 1.61 52.2 3.52 46.6 0.75 49.3 1.44 49.3 1.93 46.0 1.31 52.6 1.47 46.8 2.04 51.5 3.28 47.7 3.61 51.0 2.10 48.2 1.19 42.5 0.87 45.8 2.00 52.6 0.41 44.2 3.87 51.1 1.01 6/19/2003 MK Sullivan MK Sullivan 11438585.05 IGL volume [mm3] To discover genes influencing cerebellum development, we conducted a complex trait analysis of variation in the size of the adult mouse cerebellum. We analyzed two sets of recombinant inbred BXD strains and an F2 intercross of the common inbred strains, C57BL/6J and DBA/2J. We measured cerebellar size as the weight or volume of fixed or histologically processed tissue. Among BXD recombinant inbred strains, the cerebellum averages 52 mg (12.4% of the brain) and ranges 18 mg in size. In F2 mice, the cerebellum averages 62 mg (12.9% of the brain) and ranges approximately 20 mg in size. Five quantitative trait loci (QTLs) that significantly control variation in cerebellar size were mapped to chromosomes 1 (Cbs1a), 8 (Cbs8a), 14 (Cbs14a), and 19 (Cbs19a, Cbs19b). In combination, these QTLs can shift cerebellar size an appreciable 35% of the observed range. To assess regional genetic control of the cerebellum, we also measured the volume of the cell-rich, internal granule layer (IGL) in a set of BXD strains. The IGL ranges from 34 to 43% of total cerebellar volume. The QTL Cbs8a is significantly linked to variation in IGL volume and is suggestively linked to variation in the number of cerebellar folia. The QTLs we have discovered are among the first loci shown to modulate the size and architecture of the adult mouse cerebellum. Airey DC, Lu L, Williams RW. Genetic control of the mouse cerebellum: identification of quantitative trait loci modulating size and architecture. J Neurosci 21(14) 5099-5109 Jul 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11438585&dopt=Abstract 11438585 06 30-300 days 30 300 MF 4-8 mm3 20.3 1.81 15.0 0.93 23.0 0.20 22.7 1.00 18.8 0.55 19.5 0.82 16.4 1.04 18.6 1.78 15.8 0.69 15.2 0.53 18.6 1.27 18.5 1.19 14.5 0.57 21.6 1.56 16.4 0.77 21.1 1.73 17.3 1.13 16.9 1.15 18.9 0.98 14.9 1.10 17.8 1.01 16.5 1.37 21.2 0.65 19.5 1.24 18.7 1.57 17.6 1.17 14.6 0.56 16.8 1.01 18.9 1.42 18.1 0.86 21.7 0.94 6/19/2003 MK Sullivan MK Sullivan 11438585.06 Adjusted IGL volume [mm3] To discover genes influencing cerebellum development, we conducted a complex trait analysis of variation in the size of the adult mouse cerebellum. We analyzed two sets of recombinant inbred BXD strains and an F2 intercross of the common inbred strains, C57BL/6J and DBA/2J. We measured cerebellar size as the weight or volume of fixed or histologically processed tissue. Among BXD recombinant inbred strains, the cerebellum averages 52 mg (12.4% of the brain) and ranges 18 mg in size. In F2 mice, the cerebellum averages 62 mg (12.9% of the brain) and ranges approximately 20 mg in size. Five quantitative trait loci (QTLs) that significantly control variation in cerebellar size were mapped to chromosomes 1 (Cbs1a), 8 (Cbs8a), 14 (Cbs14a), and 19 (Cbs19a, Cbs19b). In combination, these QTLs can shift cerebellar size an appreciable 35% of the observed range. To assess regional genetic control of the cerebellum, we also measured the volume of the cell-rich, internal granule layer (IGL) in a set of BXD strains. The IGL ranges from 34 to 43% of total cerebellar volume. The QTL Cbs8a is significantly linked to variation in IGL volume and is suggestively linked to variation in the number of cerebellar folia. The QTLs we have discovered are among the first loci shown to modulate the size and architecture of the adult mouse cerebellum. Airey DC, Lu L, Williams RW. Genetic control of the mouse cerebellum: identification of quantitative trait loci modulating size and architecture. J Neurosci 21(14) 5099-5109 Jul 2001 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11438585&dopt=Abstract 11438585 07 30-300 days 30 300 MF 4-8 mm3 18.7 1.60 14.8 0.91 18.7 0.50 22.4 1.16 18.1 0.55 18.9 0.78 16.0 0.86 18.8 1.64 14.9 0.91 14.0 0.54 18.8 1.11 18.3 1.30 15.9 0.53 20.6 1.50 16.8 0.76 21.8 1.71 17.9 1.01 19.3 1.11 19.5 0.88 17.0 0.82 19.8 0.84 16.9 1.49 19.7 0.64 19.3 1.50 18.9 1.27 18.2 0.92 15.3 0.61 16.9 0.78 19.8 0.94 17.8 0.97 20.8 0.82 6/19/2003 MK Sullivan MK Sullivan 11438585.07 Retinal ganglion cell number residual [cells x1000] Common genetic polymorphisms-as opposed to rare mutations-generate almost all heritable differences in the size and structure of the CNS. Surprisingly, these normal variants have not previously been mapped or cloned in any vertebrate species. In a recent paper (), we suggested that much of the variation in retinal ganglion cell number in mice, and the striking bimodality of strain averages, are caused by one or two quantitative trait loci (QTLs). To test this idea, and to map genes linked to this variable and highly heritable quantitative trait, we have counted ganglion cells in 38 recombinant inbred strains (BXD and BXH) derived from parental strains that have high and low cell numbers. A genome-wide search using simple and composite interval-mapping techniques revealed a major QTL on chromosome (Chr) 11 in a 3 cM interval between Hoxb and Krt1 (LOD = 6.8; genome-wide p = 0.001) and possible subsidiary QTLs on Chr 2 and Chr 8. The Chr 11 locus, neuron number control 1 (Nnc1), accounts for one third of the genetic variance among BXH strains and more than half of that among BXD strains, but Nnc1 has no known effects on brain weight, eye weight, or total retinal cell number. Three strong candidate genes have been mapped previously to the same region as Nnc1. These genes-Rara, Thra, and Erbb2- encode receptors for retinoic acid, thyroxine, and neuregulin, respectively. Each receptor is expressed in the retina during development, and their ligands affect the proliferation or survival of retinal cells. Williams RW, Strom RC., Goldowitz D Natural variation in neuron number in mice is linked to a major quantitative trait locus on Chr 11. J Neurosci 18(1) 138-46 Jan 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9412494&dopt=Abstract 9412494 98075112 03 100 days 100 MF 5-11 cells x1000 -4.67 3.88 5.09 4.60 2.56 4.47 -1.47 -5.40 -6.88 1.08 0.79 -1.33 -6.48 5.16 0.91 -3.00 0.25 -9.20 4.03 -8.14 -7.75 -7.40 3.27 6.92 5.11 13.60 6/18/2003 MK Sullivan MK Sullivan 9412494.03 Tumor growth 2 weeks post-implantation [mm3] Understanding of the genetic basis of normal and abnormal development of the immune response is an enormous undertaking. The immune response, at the most minimal level, involves interactions of antigen presenting cells (APCs), T and B cells. Each of these cells produce cell surface and soluble factors (cytokines) that affect both autocrine and paracrine functions. A second level of complexity needs to consider the development of the macrophage/monocyte lineage as well as the production of the common lymphoid precursor which undergoes distinct maturation steps in the thymus and periphery to form mature T cells as well as in BM (BM) and lymphoid organs to form mature B cells. A third level of complexity involves the immune response to infectious agents including viruses and also the response to tumour antigens. In addition, there are imbalances that predispose to decreased responses (immunodeficiencies) or increased responses (autoimmunity). A fourth level of complexity involves attempts to understand the differences in the immune response that occurs at a very young age, in adults, and at a very old age. This review will focus on the use of C57BL/6 J X DBA/2 J (BXD) recombinant inbred (RI) strains of mice to map genetic loci associated with the production of lymphoid precursors in the BM, development of T cells in the thymus, and T-cell responses to stimulation in the peripheral lymphoid organs in adult and in aged mice. Strategies to improve the power and precision in which complex traits such as the age-related immune response can be mapped is limited with the current set of 35 strains of BXD mice. Strategies to increase these strains by generating recombinant intercross (RIX) strains of mice are being developed to enable this large set of lines to detect quantitative trait loci (QTLs) with a much higher consistency and statistical power. More importantly, the resolution with which these QTLs can be mapped would be greatly improved and, in many cases, adequate to carry out direct identification of candidate genes. It is likely that, given the complexity of the immune system development, the number of cells involved in an immune response, and especially the changes in the immune system with ageing, mapping hundreds of genes will be required to fully understand age-related changes in the immune response. This review outlines ongoing and future strategies that will enable the mapping and identification of these genes. Mountz JD, Van Zant GE, Zhang H-G, Grizzle WE, Ahmed R, Williams RW, Hsu H-C Genetic dissection of age-related changes of immune function in mice Scand J Immunol 54(1-2) 10-20 Jul-Aug 2001 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11439143&dopt=Abstract 11439143 01 14 months ~426 MF mm3 15.2 32.3 17.6 100.1 52.4 29.9 41.1 145.8 33.0 6/23/2003 MK Sullivan MK Sullivan 11439143.01 Tumor growth 3 weeks post-implantation [mm3] Understanding of the genetic basis of normal and abnormal development of the immune response is an enormous undertaking. The immune response, at the most minimal level, involves interactions of antigen presenting cells (APCs), T and B cells. Each of these cells produce cell surface and soluble factors (cytokines) that affect both autocrine and paracrine functions. A second level of complexity needs to consider the development of the macrophage/monocyte lineage as well as the production of the common lymphoid precursor which undergoes distinct maturation steps in the thymus and periphery to form mature T cells as well as in BM (BM) and lymphoid organs to form mature B cells. A third level of complexity involves the immune response to infectious agents including viruses and also the response to tumour antigens. In addition, there are imbalances that predispose to decreased responses (immunodeficiencies) or increased responses (autoimmunity). A fourth level of complexity involves attempts to understand the differences in the immune response that occurs at a very young age, in adults, and at a very old age. This review will focus on the use of C57BL/6 J X DBA/2 J (BXD) recombinant inbred (RI) strains of mice to map genetic loci associated with the production of lymphoid precursors in the BM, development of T cells in the thymus, and T-cell responses to stimulation in the peripheral lymphoid organs in adult and in aged mice. Strategies to improve the power and precision in which complex traits such as the age-related immune response can be mapped is limited with the current set of 35 strains of BXD mice. Strategies to increase these strains by generating recombinant intercross (RIX) strains of mice are being developed to enable this large set of lines to detect quantitative trait loci (QTLs) with a much higher consistency and statistical power. More importantly, the resolution with which these QTLs can be mapped would be greatly improved and, in many cases, adequate to carry out direct identification of candidate genes. It is likely that, given the complexity of the immune system development, the number of cells involved in an immune response, and especially the changes in the immune system with ageing, mapping hundreds of genes will be required to fully understand age-related changes in the immune response. This review outlines ongoing and future strategies that will enable the mapping and identification of these genes. Mountz JD, Van Zant GE, Zhang H-G, Grizzle WE, Ahmed R, Williams RW, Hsu H-C Genetic dissection of age-related changes of immune function in mice Scand J Immunol 54(1-2) 10-20 Jul-Aug 2001 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11439143&dopt=Abstract 11439143 02 14 months ~426 MF mm3 11.6 11.7 2.7 62.7 37.7 18.2 30.6 175.5 0 6/23/2003 MK Sullivan MK Sullivan 11439143.02 Tumor Growth 7 weeks post-implantation [mm3] Understanding of the genetic basis of normal and abnormal development of the immune response is an enormous undertaking. The immune response, at the most minimal level, involves interactions of antigen presenting cells (APCs), T and B cells. Each of these cells produce cell surface and soluble factors (cytokines) that affect both autocrine and paracrine functions. A second level of complexity needs to consider the development of the macrophage/monocyte lineage as well as the production of the common lymphoid precursor which undergoes distinct maturation steps in the thymus and periphery to form mature T cells as well as in BM (BM) and lymphoid organs to form mature B cells. A third level of complexity involves the immune response to infectious agents including viruses and also the response to tumour antigens. In addition, there are imbalances that predispose to decreased responses (immunodeficiencies) or increased responses (autoimmunity). A fourth level of complexity involves attempts to understand the differences in the immune response that occurs at a very young age, in adults, and at a very old age. This review will focus on the use of C57BL/6 J X DBA/2 J (BXD) recombinant inbred (RI) strains of mice to map genetic loci associated with the production of lymphoid precursors in the BM, development of T cells in the thymus, and T-cell responses to stimulation in the peripheral lymphoid organs in adult and in aged mice. Strategies to improve the power and precision in which complex traits such as the age-related immune response can be mapped is limited with the current set of 35 strains of BXD mice. Strategies to increase these strains by generating recombinant intercross (RIX) strains of mice are being developed to enable this large set of lines to detect quantitative trait loci (QTLs) with a much higher consistency and statistical power. More importantly, the resolution with which these QTLs can be mapped would be greatly improved and, in many cases, adequate to carry out direct identification of candidate genes. It is likely that, given the complexity of the immune system development, the number of cells involved in an immune response, and especially the changes in the immune system with ageing, mapping hundreds of genes will be required to fully understand age-related changes in the immune response. This review outlines ongoing and future strategies that will enable the mapping and identification of these genes. Mountz JD, Van Zant GE, Zhang H-G, Grizzle WE, Ahmed R, Williams RW, Hsu H-C Genetic dissection of age-related changes of immune function in mice Scand J Immunol 54(1-2) 10-20 Jul-Aug 2001 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11439143&dopt=Abstract 11439143 03 14 months ~426 MF mm3 92.3 0 3.3 62.1 26.9 0 26.9 856.7 0 6/23/2003 MK Sullivan MK Sullivan 11439143.03 Average distance traveled in thirty minutes, baseline [cm] To elucidate genes associated with cocaine's locomotor stimulant effects, we used recombinant inbred-quantitative trait loci (RI-QTL) analyses to identify chromosomal loci associated with locomotor activity before (baseline) and after cocaine treatment. RI-QTL analyses seek to identify associations between a quantitative measure of a phenotype and one or more previously mapped marker loci across a panel of RI strains. In the present study, 11 BXD RI strains were used to identify several putative QTLs for each phenotype. Both baseline locomotor activity and cocaine's locomotor stimulant effects are polygenic, with both unique and overlapping genetic influences. The largest associations for baseline activity were observed on chromosomes 5 and 9 and the largest associations for cocaine's psychomotor stimulant effects on chromosomes 3 and 17. Miner LL, Marley RJ Chromosomal mapping of the psychomotor stimulant effects of cocaine in BXD recombinant inbred mice Psychopharmacolgy 122(3) 209-214 Dec 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8748389&dopt=Abstract 8748389 01 60-120 days 60 120 Male 6-15 cm 7281.6 504.9 8898.1 703.9 11964.4 1695.8 8103.6 1257.3 14430.4 1456.3 6556.6 1066.3 4687.7 491.9 8899.7 1537.2 8686.1 841.4 5096.9 550.2 10100.3 614.9 6022.7 749.2 6449.8 712.0 6/24/2003 MK Sullivan MK Sullivan 8748389.01 Average distance traveled in thirty minutes, cocaine-stimulated [cm] To elucidate genes associated with cocaine's locomotor stimulant effects, we used recombinant inbred-quantitative trait loci (RI-QTL) analyses to identify chromosomal loci associated with locomotor activity before (baseline) and after cocaine treatment. RI-QTL analyses seek to identify associations between a quantitative measure of a phenotype and one or more previously mapped marker loci across a panel of RI strains. In the present study, 11 BXD RI strains were used to identify several putative QTLs for each phenotype. Both baseline locomotor activity and cocaine's locomotor stimulant effects are polygenic, with both unique and overlapping genetic influences. The largest associations for baseline activity were observed on chromosomes 5 and 9 and the largest associations for cocaine's psychomotor stimulant effects on chromosomes 3 and 17. Miner LL, Marley RJ Chromosomal mapping of the psychomotor stimulant effects of cocaine in BXD recombinant inbred mice Psychopharmacolgy 122(3) 209-214 Dec 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8748389&dopt=Abstract 8748389 02 60-120 days 60 120 Male 6-15 cm 7767.0 841.4 10920.7 1894.8 13071.2 1265.4 7896.4 1652.1 14561.5 1409.4 10946.6 2362.5 8200.6 1614.9 14453.1 2935.3 12119.7 2294.5 3038.8 823.6 10679.6 1508.1 4284.8 2411.0 5728.2 796.1 6/24/2003 MK Sullivan MK Sullivan 8748389.02 Stereotypical behavior frequency post daily cocaine injection (32 mg/kg), day 8 The present study investigated the effects of acute and repeated administration of cocaine (1.0-56.0 mg/kg) on locomotor activity in the genetically distinct DBA/2J and C57BL/6J inbred strains of mice. In addition, quantitative trait loci analysis of the effects of acute and repeated cocaine in 16 BXD recombinant inbred strains was used to provisionally detect and map minor gene loci which associate with cocaine responsiveness. Whereas locomotor activity was elevated maximally in both strains by 32 mg/kg of cocaine, DBA/2J mice were stimulated to a much greater extent than C57BL/6J mice. The stimulant effects of cocaine were diminished to control levels in DBA/2J mice after repeated daily injections, whereas cocaine-induced locomotion remained consistent in C57BL/6J mice throughout the 7-day testing period. Emergence of stereotyped behavior with repeated daily injections of 32 mg/kg of cocaine was observed in DBA/2J but not C57BL/6J mice. No differences in brain cocaine levels were found between the DBA/2J and C57BL/6J strains after acute or repeated injections. Quantitative trait loci analysis indicated significant associations of differences in cocaine responsiveness with marker loci on several chromosomes in the BXD recombinant inbred series. Those marker loci associated with the acute cocaine response were in most cases different from those markers associated with long-term responses. The current results demonstrate that genotype-dependent variation exists in behavioral responsiveness to cocaine in mice and suggest that the acute and long-term responses to cocaine may be under the control of separate sets of genes. Tolliver BK, Belknap JK, Woods WE, Carney JM Genetic analysis of sensitization and tolerance to cocaine J Pharmacol Exp Ther 270(3) 1230-1238 Sep 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7932176&dopt=Abstract 7932176 03 Male 3-9 0.75 0.62 17.21 3.37 3.67 3.18 1.33 1.33 0.33 0.33 0.67 0.33 1.33 1.33 4.00 4.00 0.00 0.00 4.68 2.40 3.33 2.03 1.00 0.00 0.00 0.00 5.00 1.73 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 6/26/2003 MK Sullivan 7932176.03 Average hypothermic response at 30 and 60 min post 2 g/kg ethanol injection [degrees C] A recent method allows the identification of the rough genetic map location in mice of genes that exert modest effects on continuously distributed (i.e., quantitative) variables. Sensitivity and tolerance tolerance to the hypothermic effect of ethanol were studied with the purpose of identifying such quantitative trait loci (QTL). Mice from two progenitor inbred strains, C57BL/6J and DBA/2J, and 19 of their recombinant inbred (RI) BXD strains, were given ethanol daily for 3 days. By administering several doses of ethanol and recording multiple postdrug temperatures on the first and third injection day, the authors were able to compute several indices of initial sensitivity and tolerance magnitude in the RI strain battery. The strains differed at most times and doses in their acute reductions in body temperature with respect to their predrug base lines, which indicated genetic control of sensitivity to ethanol-induced hypothermia. The areas under the curve (which describes the initial hypothermic response over time), a measure that reflects both the maximal hypothermia achieved and the duration of total hypothermic response, also differed. The strains also differed in the magnitude of the tolerance developed to ethanol-induced hypothermia. Genetic determinants of sensitivity (and tolerance) to different doses of ethanol were primarily independent, although genetic sensitivity and tolerance to the intermediate (2- and 3-g/kg) doses were significantly correlated. A comparison of the pattern of strain means for their sensitivity and tolerance to ethanol-induced hypothermia with a data base that consisted of the genotype of each BXD RI strain for almost 800 mapped polymorphic genetic markers revealed associations with several potential QTL for sensitivity and several others for tolerance, which appeared on all mouse chromosomes. Some QTL were significantly associated with both sensitivity and tolerance, which indicated that a nearby gene influences both. QTL analyses also identified several chromosomal regions in which specific candidate genes of potential relevance are mapped. Crabbe JC, Belknap JK, Mitchell SR, Crawshaw LI Quantitative trait loci mapping of genes that influence the sensitivity and tolerance to ethanol-induced hypothermia in BXD recombinant inbred mice J Pharmacol Exp Ther 269(1) 184-192 Apr 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8169823&dopt=Abstract 8169823 01 50-123 days 50 123 Female 4-14 degrees C 2.00 0.15 1.63 0.37 1.15 0.23 1.34 0.28 2.37 0.25 2.26 0.32 1.23 0.14 2.64 0.32 1.27 0.30 1.30 0.26 1.62 0.26 0.88 0.20 0.85 0.18 1.44 0.18 1.39 0.24 1.63 0.17 1.33 0.22 1.86 0.18 0.88 0.29 1.10 0.24 1.91 0.26 6/23/2003 MK Sullivan MK Sullivan 8169823.01 Average hypothermic response at 30 and 60 min post 3 g/kg ethanol injection [degrees C] A recent method allows the identification of the rough genetic map location in mice of genes that exert modest effects on continuously distributed (i.e., quantitative) variables. Sensitivity and tolerance tolerance to the hypothermic effect of ethanol were studied with the purpose of identifying such quantitative trait loci (QTL). Mice from two progenitor inbred strains, C57BL/6J and DBA/2J, and 19 of their recombinant inbred (RI) BXD strains, were given ethanol daily for 3 days. By administering several doses of ethanol and recording multiple postdrug temperatures on the first and third injection day, the authors were able to compute several indices of initial sensitivity and tolerance magnitude in the RI strain battery. The strains differed at most times and doses in their acute reductions in body temperature with respect to their predrug base lines, which indicated genetic control of sensitivity to ethanol-induced hypothermia. The areas under the curve (which describes the initial hypothermic response over time), a measure that reflects both the maximal hypothermia achieved and the duration of total hypothermic response, also differed. The strains also differed in the magnitude of the tolerance developed to ethanol-induced hypothermia. Genetic determinants of sensitivity (and tolerance) to different doses of ethanol were primarily independent, although genetic sensitivity and tolerance to the intermediate (2- and 3-g/kg) doses were significantly correlated. A comparison of the pattern of strain means for their sensitivity and tolerance to ethanol-induced hypothermia with a data base that consisted of the genotype of each BXD RI strain for almost 800 mapped polymorphic genetic markers revealed associations with several potential QTL for sensitivity and several others for tolerance, which appeared on all mouse chromosomes. Some QTL were significantly associated with both sensitivity and tolerance, which indicated that a nearby gene influences both. QTL analyses also identified several chromosomal regions in which specific candidate genes of potential relevance are mapped. Crabbe JC, Belknap JK, Mitchell SR, Crawshaw LI Quantitative trait loci mapping of genes that influence the sensitivity and tolerance to ethanol-induced hypothermia in BXD recombinant inbred mice J Pharmacol Exp Ther 269(1) 184-192 Apr 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8169823&dopt=Abstract 8169823 02 50-123 days 50 123 Female 4-14 degrees C 3.10 0.10 1.60 0.27 2.08 0.17 2.47 0.21 3.17 0.16 2.90 0.29 1.80 0.19 3.33 0.47 2.92 0.29 2.58 0.22 1.73 0.32 2.53 0.24 1.91 0.22 2.23 0.18 1.79 0.36 3.17 0.30 1.86 0.31 2.39 0.16 3.15 0.71 2.19 0.28 2.45 0.25 6/23/2003 MK Sullivan MK Sullivan 8169823.02 Average hypothermic response at 30 and 60 min post 4g/kg ethanol injection [degrees C] A recent method allows the identification of the rough genetic map location in mice of genes that exert modest effects on continuously distributed (i.e., quantitative) variables. Sensitivity and tolerance tolerance to the hypothermic effect of ethanol were studied with the purpose of identifying such quantitative trait loci (QTL). Mice from two progenitor inbred strains, C57BL/6J and DBA/2J, and 19 of their recombinant inbred (RI) BXD strains, were given ethanol daily for 3 days. By administering several doses of ethanol and recording multiple postdrug temperatures on the first and third injection day, the authors were able to compute several indices of initial sensitivity and tolerance magnitude in the RI strain battery. The strains differed at most times and doses in their acute reductions in body temperature with respect to their predrug base lines, which indicated genetic control of sensitivity to ethanol-induced hypothermia. The areas under the curve (which describes the initial hypothermic response over time), a measure that reflects both the maximal hypothermia achieved and the duration of total hypothermic response, also differed. The strains also differed in the magnitude of the tolerance developed to ethanol-induced hypothermia. Genetic determinants of sensitivity (and tolerance) to different doses of ethanol were primarily independent, although genetic sensitivity and tolerance to the intermediate (2- and 3-g/kg) doses were significantly correlated. A comparison of the pattern of strain means for their sensitivity and tolerance to ethanol-induced hypothermia with a data base that consisted of the genotype of each BXD RI strain for almost 800 mapped polymorphic genetic markers revealed associations with several potential QTL for sensitivity and several others for tolerance, which appeared on all mouse chromosomes. Some QTL were significantly associated with both sensitivity and tolerance, which indicated that a nearby gene influences both. QTL analyses also identified several chromosomal regions in which specific candidate genes of potential relevance are mapped. Crabbe JC, Belknap JK, Mitchell SR, Crawshaw LI Quantitative trait loci mapping of genes that influence the sensitivity and tolerance to ethanol-induced hypothermia in BXD recombinant inbred mice J Pharmacol Exp Ther 269(1) 184-192 Apr 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8169823&dopt=Abstract 8169823 03 50-123 days 50 123 Female 4-14 degrees C 3.40 0.14 2.93 0.48 2.33 0.14 2.53 0.24 3.65 0.20 3.48 0.21 2.11 0.18 3.47 0.54 2.98 0.34 3.73 0.54 3.90 0.40 3.23 0.35 1.83 0.19 2.71 0.43 2.74 0.23 2.77 0.25 2.40 0.52 2.07 0.23 4.29 0.30 2.31 0.18 2.92 0.13 6/23/2003 MK Sullivan MK Sullivan 8169823.03 Tolerance to ethanol-induced hypothermia post 2 g/kg ethanol injection [degrees C] A recent method allows the identification of the rough genetic map location in mice of genes that exert modest effects on continuously distributed (i.e., quantitative) variables. Sensitivity and tolerance tolerance to the hypothermic effect of ethanol were studied with the purpose of identifying such quantitative trait loci (QTL). Mice from two progenitor inbred strains, C57BL/6J and DBA/2J, and 19 of their recombinant inbred (RI) BXD strains, were given ethanol daily for 3 days. By administering several doses of ethanol and recording multiple postdrug temperatures on the first and third injection day, the authors were able to compute several indices of initial sensitivity and tolerance magnitude in the RI strain battery. The strains differed at most times and doses in their acute reductions in body temperature with respect to their predrug base lines, which indicated genetic control of sensitivity to ethanol-induced hypothermia. The areas under the curve (which describes the initial hypothermic response over time), a measure that reflects both the maximal hypothermia achieved and the duration of total hypothermic response, also differed. The strains also differed in the magnitude of the tolerance developed to ethanol-induced hypothermia. Genetic determinants of sensitivity (and tolerance) to different doses of ethanol were primarily independent, although genetic sensitivity and tolerance to the intermediate (2- and 3-g/kg) doses were significantly correlated. A comparison of the pattern of strain means for their sensitivity and tolerance to ethanol-induced hypothermia with a data base that consisted of the genotype of each BXD RI strain for almost 800 mapped polymorphic genetic markers revealed associations with several potential QTL for sensitivity and several others for tolerance, which appeared on all mouse chromosomes. Some QTL were significantly associated with both sensitivity and tolerance, which indicated that a nearby gene influences both. QTL analyses also identified several chromosomal regions in which specific candidate genes of potential relevance are mapped. Crabbe JC, Belknap JK, Mitchell SR, Crawshaw LI Quantitative trait loci mapping of genes that influence the sensitivity and tolerance to ethanol-induced hypothermia in BXD recombinant inbred mice J Pharmacol Exp Ther 269(1) 184-192 Apr 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8169823&dopt=Abstract 8169823 04 50-123 days 50 123 Female 4-14 degrees C 0.50 0.15 0.56 0.37 0.01 0.23 0.23 0.25 0.04 0.21 0.69 0.22 0.10 0.12 0.41 0.33 0.22 0.18 0.25 0.14 0.60 0.25 0.02 0.25 -0.05 0.19 -0.19 0.12 0.07 0.18 -0.50 0.21 -0.16 0.18 0.30 0.19 -0.11 0.38 -0.42 0.15 0.75 0.24 6/23/2003 MK Sullivan MK Sullivan 8169823.04 Tolerance to ethanol-induced hypothermia post 3 g/kg ethanol injection [degrees C] A recent method allows the identification of the rough genetic map location in mice of genes that exert modest effects on continuously distributed (i.e., quantitative) variables. Sensitivity and tolerance tolerance to the hypothermic effect of ethanol were studied with the purpose of identifying such quantitative trait loci (QTL). Mice from two progenitor inbred strains, C57BL/6J and DBA/2J, and 19 of their recombinant inbred (RI) BXD strains, were given ethanol daily for 3 days. By administering several doses of ethanol and recording multiple postdrug temperatures on the first and third injection day, the authors were able to compute several indices of initial sensitivity and tolerance magnitude in the RI strain battery. The strains differed at most times and doses in their acute reductions in body temperature with respect to their predrug base lines, which indicated genetic control of sensitivity to ethanol-induced hypothermia. The areas under the curve (which describes the initial hypothermic response over time), a measure that reflects both the maximal hypothermia achieved and the duration of total hypothermic response, also differed. The strains also differed in the magnitude of the tolerance developed to ethanol-induced hypothermia. Genetic determinants of sensitivity (and tolerance) to different doses of ethanol were primarily independent, although genetic sensitivity and tolerance to the intermediate (2- and 3-g/kg) doses were significantly correlated. A comparison of the pattern of strain means for their sensitivity and tolerance to ethanol-induced hypothermia with a data base that consisted of the genotype of each BXD RI strain for almost 800 mapped polymorphic genetic markers revealed associations with several potential QTL for sensitivity and several others for tolerance, which appeared on all mouse chromosomes. Some QTL were significantly associated with both sensitivity and tolerance, which indicated that a nearby gene influences both. QTL analyses also identified several chromosomal regions in which specific candidate genes of potential relevance are mapped. Crabbe JC, Belknap JK, Mitchell SR, Crawshaw LI Quantitative trait loci mapping of genes that influence the sensitivity and tolerance to ethanol-induced hypothermia in BXD recombinant inbred mice J Pharmacol Exp Ther 269(1) 184-192 Apr 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8169823&dopt=Abstract 8169823 05 50-123 days 50 123 Female 4-14 degrees C 0.91 0.17 -0.06 0.21 0.32 0.16 0.57 0.26 -0.02 0.18 0.44 0.24 0.18 0.26 0.69 0.34 0.70 0.28 0.16 0.23 -0.10 0.29 0.99 0.31 0.34 0.24 0.37 0.20 -0.73 0.31 0.18 0.25 -1.12 0.35 0.51 0.17 0.49 0.40 0.51 0.21 0.18 0.28 6/23/2003 MK Sullivan MK Sullivan 8169823.05 Tolerance to ethanol-induced hypothermia post 4 g/kg ethanol injection [degrees C] A recent method allows the identification of the rough genetic map location in mice of genes that exert modest effects on continuously distributed (i.e., quantitative) variables. Sensitivity and tolerance tolerance to the hypothermic effect of ethanol were studied with the purpose of identifying such quantitative trait loci (QTL). Mice from two progenitor inbred strains, C57BL/6J and DBA/2J, and 19 of their recombinant inbred (RI) BXD strains, were given ethanol daily for 3 days. By administering several doses of ethanol and recording multiple postdrug temperatures on the first and third injection day, the authors were able to compute several indices of initial sensitivity and tolerance magnitude in the RI strain battery. The strains differed at most times and doses in their acute reductions in body temperature with respect to their predrug base lines, which indicated genetic control of sensitivity to ethanol-induced hypothermia. The areas under the curve (which describes the initial hypothermic response over time), a measure that reflects both the maximal hypothermia achieved and the duration of total hypothermic response, also differed. The strains also differed in the magnitude of the tolerance developed to ethanol-induced hypothermia. Genetic determinants of sensitivity (and tolerance) to different doses of ethanol were primarily independent, although genetic sensitivity and tolerance to the intermediate (2- and 3-g/kg) doses were significantly correlated. A comparison of the pattern of strain means for their sensitivity and tolerance to ethanol-induced hypothermia with a data base that consisted of the genotype of each BXD RI strain for almost 800 mapped polymorphic genetic markers revealed associations with several potential QTL for sensitivity and several others for tolerance, which appeared on all mouse chromosomes. Some QTL were significantly associated with both sensitivity and tolerance, which indicated that a nearby gene influences both. QTL analyses also identified several chromosomal regions in which specific candidate genes of potential relevance are mapped. Crabbe JC, Belknap JK, Mitchell SR, Crawshaw LI Quantitative trait loci mapping of genes that influence the sensitivity and tolerance to ethanol-induced hypothermia in BXD recombinant inbred mice J Pharmacol Exp Ther 269(1) 184-192 Apr 1994 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8169823&dopt=Abstract 8169823 06 50-123 days 50 123 Female 4-14 degrees C 0.78 0.19 0.92 0.42 -0.10 0.20 0.35 0.32 0.68 0.30 0.86 0.24 -0.14 0.47 0.03 0.48 0.36 0.26 0.67 0.40 1.28 0.32 1.14 0.19 -0.11 0.16 0.47 0.34 0.50 0.14 0.34 0.28 -0.44 0.51 0.60 0.26 -0.72 0.37 0.57 0.35 0.38 0.20 6/23/2003 MK Sullivan MK Sullivan 8169823.06 Susceptibility to theiler's murine encephalomyelitis virus (TMEV) [% affected] Theiler's virus-induced demyelinating disease results from a chronic infection in the white matter of the central nervous system and provides an excellent model for human multiple sclerosis. Like multiple sclerosis, there are genetic risk factors in disease development, including genes associated with the major histocompatibility complex and with those encoding the beta chain of the T-cell receptor. Comparisons of the susceptible DBA/2 and resistant C57BL/6 strains have indicated an important role for the H-2D locus and for a non-H-2 gene (not involving the beta chain of the T-cell receptor) in differential susceptibility. In the present report, analysis of recombinant-inbred strains (BXD) between the DBA/2 and C57BL/6 strains indicated that this non-H-2 locus is located at the centromeric end of chromosome 3 near (4 +/- 4 centimorgans) the carbonic anhydrase-2 (Car-2) enzyme locus. Melvold RW, Jokinen DM, Miller SD, Del Canto MC, Lipton HL Identification of a locus on mouse chromosome 3 involved in differential susceptibility to theiler's murine encephalomyelitis virus-induced demyelinating disease J Virol 64(2) 686-690 Feb 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2296080&dopt=Abstract 2296080 01 4-6 wks 28 42 MF % affected 56 11 73 11 63 84 100 0 0 0 53 10 0 10 0 93 10 88 0 0 67 89 20 6/24/2003 MK Sullivan MK Sullivan 2296080.01 Susceptibility to TMEV-induced demyelinating disease correlating with TMEV_specific DTH responsiveness [change in ear swelling (x10-4 in.)] Theiler's virus-induced demyelinating disease results from a chronic infection in the white matter of the central nervous system and provides an excellent model for human multiple sclerosis. Like multiple sclerosis, there are genetic risk factors in disease development, including genes associated with the major histocompatibility complex and with those encoding the beta chain of the T-cell receptor. Comparisons of the susceptible DBA/2 and resistant C57BL/6 strains have indicated an important role for the H-2D locus and for a non-H-2 gene (not involving the beta chain of the T-cell receptor) in differential susceptibility. In the present report, analysis of recombinant-inbred strains (BXD) between the DBA/2 and C57BL/6 strains indicated that this non-H-2 locus is located at the centromeric end of chromosome 3 near (4 +/- 4 centimorgans) the carbonic anhydrase-2 (Car-2) enzyme locus. Melvold RW, Jokinen DM, Miller SD, Del Canto MC, Lipton HL Identification of a locus on mouse chromosome 3 involved in differential susceptibility to theiler's murine encephalomyelitis virus-induced demyelinating disease J Virol 64(2) 686-690 Feb 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2296080&dopt=Abstract 2296080 02 118-162 days 118 162 MF inches 4.2 16.9 12.4 4.3 16.1 10.0 19.2 4.9 7.7 22.1 0.2 0.9 32.8 3.5 2.4 6.5 17.4 6/24/2003 MK Sullivan MK Sullivan 2296080.02 Presence of VB3 lymph node T cells [%] V beta 3+ T cells are eliminated in Mls-2a mice carrying some, but not all, H-2 types. Analysis of AKXD and BXD recombinant inbred strains showed that Mls-2a (formerly Mlsc) was not the product of a single gene and suggested that at least two non-H-2 genes control V beta 3 levels. Studies of the progeny of a B10.BR x (C3H/HeJ x B10.BR)F1 backcross confirmed the existence of two V beta 3+ T cell deleting genes: one unlinked and one linked to Ly-7, which we propose be called Mls-2 and Mls-3, respectively. Mls-2a induces partial deletion of V beta 3+ T cells with a bias toward deleting CD4+ cells. It stimulates V beta 3+ hybrids and may be linked to Mtv-13 on chromosome 4. A third non-H-2 gene is implicated in enhancing the presentation of Mls-2a. Mls-3a causes elimination of all V beta 3+ T cells in H-2k and H-2d mice but poorly stimulates V beta 3+ hybrids. Pullen AM, Marrack P, Kappler JW Evidence that Mls-2anitgens which delete VB3+ T cells are controlled by multiple genes J Immunol 142(9) 3033-3037 May 1989 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2496158&dopt=Abstract 2496158 01 MF % 3.3 0.1 0.1 0.0 1.5 0.0 2.7 0.2 1.9 0.1 4.9 0.3 1.0 0.3 1.8 1.8 0.1 0.0 0.6 0.1 4.0 4.3 2.7 0.1 1.3 0.3 0.3 0.2 1.3 0.3 1.4 0.3 1.4 0.4 1.4 0.5 1.0 0.4 0.1 0.1 0.2 0.1 0.1 0.2 1.6 0.0 0.7 1.3 0.2 0.0 6/24/2003 MK Sullivan MK Sullivan 2496158.01 Proliferation of JTL-G12 (Tcell clone) without 50 µg/ml GAT (Glu60, Ala30, Tyr10) [cpm] We have isolated a BALB/c (H-2d, Mlsb) T cell clone (JTL-G12) specific for the synthetic polypeptide antigen poly(Glu60Ala30Tyr10) (GAT) in the context of self I-A determinants and for Mlsa,d antigens in the absence of GAT. JTL-G12 proliferation in response to GAT was mapped to the Kd, I-Ad subregions by using inbred H-2 congenic and recombinant strains. In addition, monoclonal antibody directed against I-Ad but not Kd or I-As determinants blocked JTL-G12 proliferation in response to GAT presented by syngeneic splenocytes, indicating I-A restriction. The Mls cross-reactivity of this clone was verified by using a panel of inbred strains bearing the Mlsa,b,c,d alleles and by using BXD recombinant inbred strains bearing the Mlsa allele or the Mlsb allele. All of the Mlsa BXD strains of the H-2d or H-2b haplotypes stimulated JTL-G12 in the absence of GAT, whereas all of the Mlsb BXD strains were nonstimulatory. This response pattern is in complete accordance with recognition of the Mlsa determinant encoded by Mls or closely linked loci on chromosome 1. JTL-G12 proliferation in response to GAT/I-Ad and Mlsa,d determinants could be blocked with a monoclonal antibody (GK1.5) directed against L3T4, a structure involved in class II major histocompatibility complex antigen recognition. These results suggest that antigen/class II responsiveness, Mls reactivity, and expression of L3T4 can be properties of a single T cell population. Jenkins MK, Melvold RW, Miller SD Isolation and characterization of an I-A-restricted T cell clone with dual specificity for poly (Glu60 Ala30 Tyr10) and MlsA,D1 J Immunol 133(2) 616-622 Aug 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6203970&dopt=Abstract 6203970 01 6-10 wks 42 70 MF cpm 410 10040 190 980 14010 120 10360 6050 7460 140 180 270 290 170 240 180 220 2260 140 6200 6750 8240 9110 6330 9920 290 6400 7/15/2003 MK Sullivan MK Sullivan 6203970.01 Proliferation of JTL-G12 (Tcell clone) with 50 µg/ml GAT (Glu60, Ala30, Tyr10) [cpm] We have isolated a BALB/c (H-2d, Mlsb) T cell clone (JTL-G12) specific for the synthetic polypeptide antigen poly(Glu60Ala30Tyr10) (GAT) in the context of self I-A determinants and for Mlsa,d antigens in the absence of GAT. JTL-G12 proliferation in response to GAT was mapped to the Kd, I-Ad subregions by using inbred H-2 congenic and recombinant strains. In addition, monoclonal antibody directed against I-Ad but not Kd or I-As determinants blocked JTL-G12 proliferation in response to GAT presented by syngeneic splenocytes, indicating I-A restriction. The Mls cross-reactivity of this clone was verified by using a panel of inbred strains bearing the Mlsa,b,c,d alleles and by using BXD recombinant inbred strains bearing the Mlsa allele or the Mlsb allele. All of the Mlsa BXD strains of the H-2d or H-2b haplotypes stimulated JTL-G12 in the absence of GAT, whereas all of the Mlsb BXD strains were nonstimulatory. This response pattern is in complete accordance with recognition of the Mlsa determinant encoded by Mls or closely linked loci on chromosome 1. JTL-G12 proliferation in response to GAT/I-Ad and Mlsa,d determinants could be blocked with a monoclonal antibody (GK1.5) directed against L3T4, a structure involved in class II major histocompatibility complex antigen recognition. These results suggest that antigen/class II responsiveness, Mls reactivity, and expression of L3T4 can be properties of a single T cell population. Jenkins MK, Melvold RW, Miller SD Isolation and characterization of an I-A-restricted T cell clone with dual specificity for poly (Glu60 Ala30 Tyr10) and MlsA,D1 J Immunol 133(2) 616-622 Aug 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6203970&dopt=Abstract 6203970 02 6-10 wks 42 70 MF cpm 270 11340 9420 2380 15850 12450 10080 10210 10480 14080 250 330 370 14690 17530 170 6330 6120 280 9820 11460 11810 13760 5480 14000 8150 7970 7/15/2003 MK Sullivan MK Sullivan 6203970.02 Proliferation of JTL-G12.8 (Tcell clone) without 50 µg/ml GAT (Glu60, Ala30, Tyr10) [cpm] We have isolated a BALB/c (H-2d, Mlsb) T cell clone (JTL-G12) specific for the synthetic polypeptide antigen poly(Glu60Ala30Tyr10) (GAT) in the context of self I-A determinants and for Mlsa,d antigens in the absence of GAT. JTL-G12 proliferation in response to GAT was mapped to the Kd, I-Ad subregions by using inbred H-2 congenic and recombinant strains. In addition, monoclonal antibody directed against I-Ad but not Kd or I-As determinants blocked JTL-G12 proliferation in response to GAT presented by syngeneic splenocytes, indicating I-A restriction. The Mls cross-reactivity of this clone was verified by using a panel of inbred strains bearing the Mlsa,b,c,d alleles and by using BXD recombinant inbred strains bearing the Mlsa allele or the Mlsb allele. All of the Mlsa BXD strains of the H-2d or H-2b haplotypes stimulated JTL-G12 in the absence of GAT, whereas all of the Mlsb BXD strains were nonstimulatory. This response pattern is in complete accordance with recognition of the Mlsa determinant encoded by Mls or closely linked loci on chromosome 1. JTL-G12 proliferation in response to GAT/I-Ad and Mlsa,d determinants could be blocked with a monoclonal antibody (GK1.5) directed against L3T4, a structure involved in class II major histocompatibility complex antigen recognition. These results suggest that antigen/class II responsiveness, Mls reactivity, and expression of L3T4 can be properties of a single T cell population. Jenkins MK, Melvold RW, Miller SD Isolation and characterization of an I-A-restricted T cell clone with dual specificity for poly (Glu60 Ala30 Tyr10) and MlsA,D1 J Immunol 133(2) 616-622 Aug 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6203970&dopt=Abstract 6203970 03 6-10 wks 42 70 MF cpm 160 4940 170 980 7470 160 7080 7000 5220 140 230 350 320 340 570 120 190 3290 140 4100 4240 5770 5310 2920 5590 590 4920 7/15/2003 MK Sullivan MK Sullivan 6203970.03 Proliferation of JTL-G12.8 (Tcell clone) with 50 µg/ml GAT (Glu60, Ala30, Tyr10) [cpm] We have isolated a BALB/c (H-2d, Mlsb) T cell clone (JTL-G12) specific for the synthetic polypeptide antigen poly(Glu60Ala30Tyr10) (GAT) in the context of self I-A determinants and for Mlsa,d antigens in the absence of GAT. JTL-G12 proliferation in response to GAT was mapped to the Kd, I-Ad subregions by using inbred H-2 congenic and recombinant strains. In addition, monoclonal antibody directed against I-Ad but not Kd or I-As determinants blocked JTL-G12 proliferation in response to GAT presented by syngeneic splenocytes, indicating I-A restriction. The Mls cross-reactivity of this clone was verified by using a panel of inbred strains bearing the Mlsa,b,c,d alleles and by using BXD recombinant inbred strains bearing the Mlsa allele or the Mlsb allele. All of the Mlsa BXD strains of the H-2d or H-2b haplotypes stimulated JTL-G12 in the absence of GAT, whereas all of the Mlsb BXD strains were nonstimulatory. This response pattern is in complete accordance with recognition of the Mlsa determinant encoded by Mls or closely linked loci on chromosome 1. JTL-G12 proliferation in response to GAT/I-Ad and Mlsa,d determinants could be blocked with a monoclonal antibody (GK1.5) directed against L3T4, a structure involved in class II major histocompatibility complex antigen recognition. These results suggest that antigen/class II responsiveness, Mls reactivity, and expression of L3T4 can be properties of a single T cell population. Jenkins MK, Melvold RW, Miller SD Isolation and characterization of an I-A-restricted T cell clone with dual specificity for poly (Glu60 Ala30 Tyr10) and MlsA,D1 J Immunol 133(2) 616-622 Aug 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6203970&dopt=Abstract 6203970 04 6-10 wks 42 70 MF cpm 210 7310 6580 1020 9040 9870 7000 9170 7120 8000 300 280 430 9150 9690 210 2600 4640 180 6240 7680 9580 7290 2560 8260 6410 5760 7/15/2003 MK Sullivan MK Sullivan 6203970.04 Morris water maze site preference [number of crosses over the trained site minus the mean of crosses over alternative sites] Activation of protein kinase C (PKC) via neurotransmitter coupling processes has been associated with long-term potentiation (LTP) or classical conditioning, but whether natural variation in PKC activity affects learning performance remains to be determined. Inbred strains of mice differ in their ability to exhibit spatial reference memory as measured by the Morris water task. C57BL/6Ibg (C57) mice perform the task better than DBA/2Ibg (DBA) mice, which show relatively little spatial preference. Hippocampal PKC activity extracted from the particulate fraction was lower in DBA mice than in C57 mice. To examine the potential relationship of PKC activity with spatial learning performance, 11 C57BL/6J x DBA/2J recombinant inbred strains (BXD RIs) were trained in the place learning version of the Morris water task. Cortical and hippocampal PKC activities were measured. Variation in spatial learning performance and PKC activity from cortex and hippocampus was observed. A positive significant correlation was observed between measures of spatial learning accuracy and hippocampal PKC in these strains. No correlation was observed between spatial learning accuracy and cortical PKC activity. These data suggest that animals with lower hippocampal PKC activity may have problems performing spatial reference memory tasks with the same degree of accuracy as those with higher hippocampal PKC activity. Wehner JM, Sleight S, Upchurch M Hippocampal protein kinase C activity is reduced in poor spatial learners Brain Res 523(2) 181-187 Jul 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2400904&dopt=Abstract 2400904 01 60-120 days 60 120 Male 3-13 number of crosses over the trained site minus the mean of crosses over alternative sites 1.12 0.460 5.85 0.868 1.89 0.823 2.06 1.054 2.74 1.764 2.21 0.659 2.00 1.081 3.00 1.047 3.82 1.424 2.34 1.031 3.29 0.924 6/24/2003 MK Sullivan MK Sullivan 2400904.01 Morris water maze search-time preference, amount of time spent in the trained quadrant of the pool minus mean time in the alternative quadrants [seconds] Activation of protein kinase C (PKC) via neurotransmitter coupling processes has been associated with long-term potentiation (LTP) or classical conditioning, but whether natural variation in PKC activity affects learning performance remains to be determined. Inbred strains of mice differ in their ability to exhibit spatial reference memory as measured by the Morris water task. C57BL/6Ibg (C57) mice perform the task better than DBA/2Ibg (DBA) mice, which show relatively little spatial preference. Hippocampal PKC activity extracted from the particulate fraction was lower in DBA mice than in C57 mice. To examine the potential relationship of PKC activity with spatial learning performance, 11 C57BL/6J x DBA/2J recombinant inbred strains (BXD RIs) were trained in the place learning version of the Morris water task. Cortical and hippocampal PKC activities were measured. Variation in spatial learning performance and PKC activity from cortex and hippocampus was observed. A positive significant correlation was observed between measures of spatial learning accuracy and hippocampal PKC in these strains. No correlation was observed between spatial learning accuracy and cortical PKC activity. These data suggest that animals with lower hippocampal PKC activity may have problems performing spatial reference memory tasks with the same degree of accuracy as those with higher hippocampal PKC activity. Wehner JM, Sleight S, Upchurch M Hippocampal protein kinase C activity is reduced in poor spatial learners Brain Res 523(2) 181-187 Jul 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2400904&dopt=Abstract 2400904 02 60-120 days 60 120 Male 3-13 seconds 8.43 2.495 19.45 1.192 6.11 2.211 11.61 4.632 10.47 8.667 7.59 4.859 12.37 3.316 10.84 3.665 13.35 5.235 6.23 4.205 11.92 4.111 6/24/2003 MK Sullivan MK Sullivan 2400904.02 Protein kinase C (PKC) activity for total hippocampus [pmol/min/mg protein] Activation of protein kinase C (PKC) via neurotransmitter coupling processes has been associated with long-term potentiation (LTP) or classical conditioning, but whether natural variation in PKC activity affects learning performance remains to be determined. Inbred strains of mice differ in their ability to exhibit spatial reference memory as measured by the Morris water task. C57BL/6Ibg (C57) mice perform the task better than DBA/2Ibg (DBA) mice, which show relatively little spatial preference. Hippocampal PKC activity extracted from the particulate fraction was lower in DBA mice than in C57 mice. To examine the potential relationship of PKC activity with spatial learning performance, 11 C57BL/6J x DBA/2J recombinant inbred strains (BXD RIs) were trained in the place learning version of the Morris water task. Cortical and hippocampal PKC activities were measured. Variation in spatial learning performance and PKC activity from cortex and hippocampus was observed. A positive significant correlation was observed between measures of spatial learning accuracy and hippocampal PKC in these strains. No correlation was observed between spatial learning accuracy and cortical PKC activity. These data suggest that animals with lower hippocampal PKC activity may have problems performing spatial reference memory tasks with the same degree of accuracy as those with higher hippocampal PKC activity. Wehner JM, Sleight S, Upchurch M Hippocampal protein kinase C activity is reduced in poor spatial learners Brain Res 523(2) 181-187 Jul 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2400904&dopt=Abstract 2400904 03 60-120 days 60 120 Male 3-9 pmol/min/mg protein 416 230.3 1347 145.3 568 132.0 398 64.2 901 112.5 856 91.9 844 110.1 1122 252.4 931 144.0 843 43.5 902 92.4 6/24/2003 MK Sullivan MK Sullivan 2400904.03 Protein kinase C (PKC) activity for particulate hippocampus [pmol/min/mg protein] Activation of protein kinase C (PKC) via neurotransmitter coupling processes has been associated with long-term potentiation (LTP) or classical conditioning, but whether natural variation in PKC activity affects learning performance remains to be determined. Inbred strains of mice differ in their ability to exhibit spatial reference memory as measured by the Morris water task. C57BL/6Ibg (C57) mice perform the task better than DBA/2Ibg (DBA) mice, which show relatively little spatial preference. Hippocampal PKC activity extracted from the particulate fraction was lower in DBA mice than in C57 mice. To examine the potential relationship of PKC activity with spatial learning performance, 11 C57BL/6J x DBA/2J recombinant inbred strains (BXD RIs) were trained in the place learning version of the Morris water task. Cortical and hippocampal PKC activities were measured. Variation in spatial learning performance and PKC activity from cortex and hippocampus was observed. A positive significant correlation was observed between measures of spatial learning accuracy and hippocampal PKC in these strains. No correlation was observed between spatial learning accuracy and cortical PKC activity. These data suggest that animals with lower hippocampal PKC activity may have problems performing spatial reference memory tasks with the same degree of accuracy as those with higher hippocampal PKC activity. Wehner JM, Sleight S, Upchurch M Hippocampal protein kinase C activity is reduced in poor spatial learners Brain Res 523(2) 181-187 Jul 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2400904&dopt=Abstract 2400904 04 60-120 days 60 120 Male 3-9 pmol/min/mg protein 95 77.7 349 56.7 195 52.3 140 92.6 353 72.4 142 6.31 296 23.4 213 45.1 375 49.9 209 38.8 437 56.2 6/24/2003 MK Sullivan MK Sullivan 2400904.04 Protein kinase C (PKC) activity for cytosolic hippocampus [pmol/min/mg protein] Activation of protein kinase C (PKC) via neurotransmitter coupling processes has been associated with long-term potentiation (LTP) or classical conditioning, but whether natural variation in PKC activity affects learning performance remains to be determined. Inbred strains of mice differ in their ability to exhibit spatial reference memory as measured by the Morris water task. C57BL/6Ibg (C57) mice perform the task better than DBA/2Ibg (DBA) mice, which show relatively little spatial preference. Hippocampal PKC activity extracted from the particulate fraction was lower in DBA mice than in C57 mice. To examine the potential relationship of PKC activity with spatial learning performance, 11 C57BL/6J x DBA/2J recombinant inbred strains (BXD RIs) were trained in the place learning version of the Morris water task. Cortical and hippocampal PKC activities were measured. Variation in spatial learning performance and PKC activity from cortex and hippocampus was observed. A positive significant correlation was observed between measures of spatial learning accuracy and hippocampal PKC in these strains. No correlation was observed between spatial learning accuracy and cortical PKC activity. These data suggest that animals with lower hippocampal PKC activity may have problems performing spatial reference memory tasks with the same degree of accuracy as those with higher hippocampal PKC activity. Wehner JM, Sleight S, Upchurch M Hippocampal protein kinase C activity is reduced in poor spatial learners Brain Res 523(2) 181-187 Jul 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2400904&dopt=Abstract 2400904 05 60-120 days 60 120 Male 3-9 pmol/min/mg protein 438 158.5 992 115.1 374 93.6 257 47.5 544 41.3 715 81.3 57.4 121.0 906 254.0 449 80.4 636 86.4 457 35.3 6/24/2003 MK Sullivan MK Sullivan 2400904.05 Protein kinase C (PKC) activity for total cortex [pmol/min/mg protein] Activation of protein kinase C (PKC) via neurotransmitter coupling processes has been associated with long-term potentiation (LTP) or classical conditioning, but whether natural variation in PKC activity affects learning performance remains to be determined. Inbred strains of mice differ in their ability to exhibit spatial reference memory as measured by the Morris water task. C57BL/6Ibg (C57) mice perform the task better than DBA/2Ibg (DBA) mice, which show relatively little spatial preference. Hippocampal PKC activity extracted from the particulate fraction was lower in DBA mice than in C57 mice. To examine the potential relationship of PKC activity with spatial learning performance, 11 C57BL/6J x DBA/2J recombinant inbred strains (BXD RIs) were trained in the place learning version of the Morris water task. Cortical and hippocampal PKC activities were measured. Variation in spatial learning performance and PKC activity from cortex and hippocampus was observed. A positive significant correlation was observed between measures of spatial learning accuracy and hippocampal PKC in these strains. No correlation was observed between spatial learning accuracy and cortical PKC activity. These data suggest that animals with lower hippocampal PKC activity may have problems performing spatial reference memory tasks with the same degree of accuracy as those with higher hippocampal PKC activity. Wehner JM, Sleight S, Upchurch M Hippocampal protein kinase C activity is reduced in poor spatial learners Brain Res 523(2) 181-187 Jul 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2400904&dopt=Abstract 2400904 06 60-120 days 60 120 Male 3-9 pmol/min/mg protein 391 53.9 619 70.3 279 72.6 494 69.5 419 34.0 1018 155.4 273 108.1 503 60.6 356 41.4 495 156.5 540 124.2 6/24/2003 MK Sullivan MK Sullivan 2400904.06 Protein kinase C (PKC) activity for particulate cortex [pmol/min/mg protein] Activation of protein kinase C (PKC) via neurotransmitter coupling processes has been associated with long-term potentiation (LTP) or classical conditioning, but whether natural variation in PKC activity affects learning performance remains to be determined. Inbred strains of mice differ in their ability to exhibit spatial reference memory as measured by the Morris water task. C57BL/6Ibg (C57) mice perform the task better than DBA/2Ibg (DBA) mice, which show relatively little spatial preference. Hippocampal PKC activity extracted from the particulate fraction was lower in DBA mice than in C57 mice. To examine the potential relationship of PKC activity with spatial learning performance, 11 C57BL/6J x DBA/2J recombinant inbred strains (BXD RIs) were trained in the place learning version of the Morris water task. Cortical and hippocampal PKC activities were measured. Variation in spatial learning performance and PKC activity from cortex and hippocampus was observed. A positive significant correlation was observed between measures of spatial learning accuracy and hippocampal PKC in these strains. No correlation was observed between spatial learning accuracy and cortical PKC activity. These data suggest that animals with lower hippocampal PKC activity may have problems performing spatial reference memory tasks with the same degree of accuracy as those with higher hippocampal PKC activity. Wehner JM, Sleight S, Upchurch M Hippocampal protein kinase C activity is reduced in poor spatial learners Brain Res 523(2) 181-187 Jul 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2400904&dopt=Abstract 2400904 07 60-120 days 60 120 Male 3-9 pmol/min/mg protein 184 27.6 177 43.2 113 44.6 295 129.2 142 54.6 560 167.2 154 147.2 137 56.5 67 105.7 259 109.9 194 87.0 6/24/2003 MK Sullivan MK Sullivan 2400904.07 Protein kinase C (PKC) activity for cytosolic cortex [pmol/min/mg protein] Activation of protein kinase C (PKC) via neurotransmitter coupling processes has been associated with long-term potentiation (LTP) or classical conditioning, but whether natural variation in PKC activity affects learning performance remains to be determined. Inbred strains of mice differ in their ability to exhibit spatial reference memory as measured by the Morris water task. C57BL/6Ibg (C57) mice perform the task better than DBA/2Ibg (DBA) mice, which show relatively little spatial preference. Hippocampal PKC activity extracted from the particulate fraction was lower in DBA mice than in C57 mice. To examine the potential relationship of PKC activity with spatial learning performance, 11 C57BL/6J x DBA/2J recombinant inbred strains (BXD RIs) were trained in the place learning version of the Morris water task. Cortical and hippocampal PKC activities were measured. Variation in spatial learning performance and PKC activity from cortex and hippocampus was observed. A positive significant correlation was observed between measures of spatial learning accuracy and hippocampal PKC in these strains. No correlation was observed between spatial learning accuracy and cortical PKC activity. These data suggest that animals with lower hippocampal PKC activity may have problems performing spatial reference memory tasks with the same degree of accuracy as those with higher hippocampal PKC activity. Wehner JM, Sleight S, Upchurch M Hippocampal protein kinase C activity is reduced in poor spatial learners Brain Res 523(2) 181-187 Jul 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2400904&dopt=Abstract 2400904 08 60-120 days 60 120 Male 3-9 pmol/min/mg protein 302 62.9 512 105.0 169 78.2 261 40.6 276 26.9 461 113.4 229 78.3 361 71.3 285 37.7 345 72.3 451 132.8 6/24/2003 MK Sullivan MK Sullivan 2400904.08 Anergy measured by footpad thickness resulting from BCG injection [mm] The genetics of BCG-induced anergy was studied in mice by evaluating delayed hypersensitivity to sheep erythrocytes. Data obtained using congenic mice and by linkage analysis suggested that genes linked to the H-2 complex do not influence the development of anergy. However, studies in allotype-congenic partners (BALB/c; BALB.Igb) indicated that anergy was influenced by genes linked to the immunoglobulin heavy chain complex (Igh). Breeding studies indicated that the gene influencing anergy is recessive. These studies were extended by using BXD recombinant inbred mice, and verified that anergy is controlled by genes linked to the Igh complex. Because several markers and a tentative map has been constructed for the Igh complex on chromosome 12 in BXD mice, we suggest that the gene that controls BCG-induced anergy is located on the centrometric side of Igh-C approximately 18 to 28 recombination units. Schrier DJ, Sternick JL, Allen EM, Moore VL Immunogenetics of BCG-induced anergy in mice: control by genes linked to the Igh complex J Immunol 128(3) 1466-1469 Mar 1982 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6799576&dopt=Abstract 6799576 01 8-12 wks 56 84 MF 2-14 mm 0.68 0.11 0.22 0.08 0.25 0.06 0.67 0.14 0.14 0.03 0.63 0.11 0.64 0.02 0.79 0.04 0.15 0.05 0.48 0.14 0.92 0.06 0.92 0.07 0.15 0.03 0.86 0.08 1.0 0.17 0.31 0.03 0.30 0.12 0.60 0.07 0.74 0.11 0.80 0.13 0.99 0.08 0.46 0.08 0.64 0.07 6/26/2003 MK Sullivan MK Sullivan 6799576.01 Cerebellum fissure frequency (mean) Variation in the cerebellar folial pattern of mice is influenced by genetic elements [Inouye, M. and Oda, S., J. Comp. Neurol., 190 (1980) 357-362]. In crosses of C57BL/6J and DBA/2J inbred mice, the presence or absence of a specific fissure, the intraculminate fissure, is largely determined by a single genetic locus (Cfp-1), which is located on distal Chromosome 4 [Neumann et al., Brain Res., 524 (1990) 85-89]. In the present study, the mid-sagittal cerebellar folial pattern has been examined in crosses of C57BL/6J and DBA/2J mice and in BXD recombinant inbred strains. At least three loci, including Cfp-1, are involved in variation in vermian pattern formation. Genetic variation in thyroid hormone function may be involved in the inheritance of folial pattern. A locus (Cfp-2) that appears to be partially responsible for this negative genetic correlation in mice may be linked to Afp on Chromosome 5. This hypothesis was suggested by the negative correlation between neonatal serum T4 level and the number of folia in rats given neonatal injections of thyroxine or propylthiouracil [Lauder, J.M. et al., Brain Res., 76 (1974) 33-40]. Neumann PE, Garretson JD, Skabardonis GP, Mueller GG Genetic analysis of cerebellar folial pattern in crosses of C57BL/6J and DBA?2J inbred mice Brain Res 619(1-2) 81-88 Aug 1993 8374795 01 3-30 Fissure number 9.95 0.62 6.19 0.51 8.41 0.62 10.27 0.8 9.1 0.64 9.89 0.33 8.83 0.41 7.33 0.58 9.5 0.91 9.1 0.32 9.13 1.07 8.57 0.76 10.25 0.46 8.4 0.89 9.2 1.3 8.83 0.99 9.0 0.82 10.13 0.35 9.4 0.77 8.06 0.64 8.96 0.96 10.07 0.73 9.0 0.92 9.0 0.0 7.25 0.96 8.85 0.49 6/24/2003 Mk Sullivan Mk Sullivan 8374795.01 Ectromelia virus-induced mortality males [mortality number] Four genetic loci were tested for linkage with loci that control genetic resistance to lethal ectromelia virus infection in mice. Three of the loci were selected because of concordance with genotypes assigned to recombinant inbred (RI) strains of mice derived from resistant C57BL/6 and susceptible DBA/2 (BXD) mice on the basis of their responses to challenge infection. Thirty-six of 167 male (C57BL/6 x DBA/2)F1 x DBA/2 backcross (BC) mice died (22%), of which 27 (75%) were homozygous for DBA/2 alleles at Hc and H-2D. Twenty-eight percent of sham-castrated and 6% of sham-ovariectomized BC mice were susceptible to lethal mousepox, whereas 50% of gonadectomized mice were susceptible. There was no linkage evident between Hc or H-2D and loci that controlled resistance to lethal ectromelia virus infection in 44 castrated BC mice. Mortality among female mice of BXD RI strains with susceptible or intermediate male phenotypes was strongly correlated (r = 0.834) with male mortality. Gonadectomized C57BL/6 mice were as resistant as intact mice to lethal ectromelia virus infection. These results indicate that two gonad-dependent genes on chromosomes 2 and 17 and one gonad-independent gene control resistance to mousepox virus infection, that males and females share gonad-dependent genes, and that the gonad-independent gene is fully protective. Brownstein DG, Bhatt PN, Gras L, Jacoby RO Chromosomal locations and gonadal dependence of genes that mediate resistance to ectromelia (mousepox) virus-induced mortality J Virol 65(4) 1946-1951 Apr 1991 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2002550&dopt=Abstract 2002550 01 8 wks 56 Male 6-8 mortality number 3 8 7 4 3 6 2 8 5 4 8 6/25/2003 MK Sullivan MK Sullivan 2002550.01 Ectromelia virus-induced mortality females [mortality number] Four genetic loci were tested for linkage with loci that control genetic resistance to lethal ectromelia virus infection in mice. Three of the loci were selected because of concordance with genotypes assigned to recombinant inbred (RI) strains of mice derived from resistant C57BL/6 and susceptible DBA/2 (BXD) mice on the basis of their responses to challenge infection. Thirty-six of 167 male (C57BL/6 x DBA/2)F1 x DBA/2 backcross (BC) mice died (22%), of which 27 (75%) were homozygous for DBA/2 alleles at Hc and H-2D. Twenty-eight percent of sham-castrated and 6% of sham-ovariectomized BC mice were susceptible to lethal mousepox, whereas 50% of gonadectomized mice were susceptible. There was no linkage evident between Hc or H-2D and loci that controlled resistance to lethal ectromelia virus infection in 44 castrated BC mice. Mortality among female mice of BXD RI strains with susceptible or intermediate male phenotypes was strongly correlated (r = 0.834) with male mortality. Gonadectomized C57BL/6 mice were as resistant as intact mice to lethal ectromelia virus infection. These results indicate that two gonad-dependent genes on chromosomes 2 and 17 and one gonad-independent gene control resistance to mousepox virus infection, that males and females share gonad-dependent genes, and that the gonad-independent gene is fully protective. Brownstein DG, Bhatt PN, Gras L, Jacoby RO Chromosomal locations and gonadal dependence of genes that mediate resistance to ectromelia (mousepox) virus-induced mortality J Virol 65(4) 1946-1951 Apr 1991 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2002550&dopt=Abstract 2002550 02 8 wks 56 Female 7-8 mortality number 1 8 4 0 1 4 0 4 8 1 7 6/25/2003 MK Sullivan MK Sullivan 2002550.02 Life span (mean) [days] In this longevity analysis of 360 BXD recombinant inbred female mice (20 different strains), 2 strains had very significantly shorter survival and 1 strain had very significantly longer survival than the other 17 strains; 4 other strains had less significant lengthening of survival compared to the other 13 strains in a proportional hazards model of survival. Mean survival on the shortest lived strain was 479 days; on the longest lived strain the mean survival was almost double (904 days). Ranges of survival within strain were very large (averaging 642 days), and strain accounted for only 29% of the variation in survival, showing that there are important environmental and/or special developmental effects on longevity even in this colony housed in a single room. Each strain had been typed for markers of 141 regions on 15 chromosomes; 101 of these markers had distinguishable distributions on the 20 strains. The two shortest lived strains had the same alleles for 63% of the markers. The single region most significantly correlated with survival (marked by P450, Coh, Xmmv-35 on chromosome 7) divided the mice into two groups with survival medians which differed by 153 days (755 days for mice with a B genotype; 602 days for mice with a D genotype). Evaluated individually, 44% of the genetic markers (including some markers on 11 of 15 chromosomes with any markers typed) were found to be significantly correlated with survival (P less than 0.05) although one would only expect 5% of the markers to be significant by chance. While studies of many markers should adjust for the multiple comparisons problem, one interpretation of these crude P values is that any experiment with only one of these "significant" markers typed would be likely to conclude that the marker was a significant predictor of survival. Two types of multiple regression models were used to examine the correlation with survival of groups of genes. When a proportional hazards model for survival was done in terms of genotype regions, a six genetic region model best correlated with survival: that marked by P450, Coh, Xmmv-35 on chromosome 7 (B allele lives longer), Ly-24 on chromosome 2 (B allele lives longer), beta 2M and H-3 on chromosome 2 (D allele lives longer) Lamb-2 on chromosome 1 (D allele lives longer), Ltw-4 on chromosome 1 (B allele lives longer), and the Igh area of chromosome 12 (Igh-Sa4, Igh-Sa2, Igh-Bgl, Igh-Nbp, Igh-Npid, Igh-Gte, Odc-8, and Ox-1; D allele lives longer). A linear model that regressed mean survival (per strain) on genetic markers found a similar six region model to be best, but replaced Coh by D12Nyu1 on chromosome 12. It should be noted that in both types of regression, there were many other models almost as good as the best one. The total number of chromosomal regions marked by the genotype of the longer lived B parent (out of a possible 141) was not, in general, correlated with survival, although the two shortest lived strains had the most B genes. It appears that BXD recombinant inbred strains can vary widely in survival both within and between strains, that no single genetic marker which has yet been identified can account for much of this variance, (although groups of six or more markers may do so), and that it is not always those strains which inherit the most genes from the long-lived parent B that live longest. The large number of genetic markers found to be significantly correlated with survival raises questions of the reliability of conclusions based on survival studies of only one or two genetic regions. Gelman R, Watson A, Bronson R, Yunis E Murine chromosomal regions correlated with longevity Genetics 118(4) 693-704 Apr 1988 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3163317&dopt=Abstract 3163317 01 Female 10-21 days 594 479 528 687 617 816 750 738 493 798 642 742 904 743 763 835 711 765 703 737 6/26/2003 MK Sullivan MK Sullivan 3163317.01 Cytosolic Ah receptor levels in liver, fmol/mg cytosolic protein Aryl hydrocarbon (benzo[a]pyrene) hydroxylase inducibility by benzo[a]anthracene was studied in 29 somatic cell hybrid clones, developed by fusing mouse spleen or peritoneal cells from four different inbred strains with hypoxanthine phosphoribosyltransferase-deficient Chinese hamster E36 cells. Karyotype analysis plus 25 markers assigned to 16 autosomes and the X chromosome were examined. In 28 of the 29 clones, the presence or absence of inducibility is associated with the presence or absence, respectively, of mouse chromosome 17. Liver microsomal aryl hydrocarbon hydroxylase induction by 3-methylcholanthrene or benzo[a]anthracene was assessed in appropriate backcrosses with the Mus musculus molossinus, M. m. castaneus, MOR/Cv, PL/J, SM/J and DBA/2J inbred strains and in 13 NX8 recombinant inbred lines. Twenty-seven biochemical genetic markers representing all but four autosomes were tested for possible linkage with the hydroxylase inducibility, and no linkage was found. The hepatic Ah receptor was quantitated in 26 BXD recombinant inbred lines; the Ah phenotype did not match exactly any of the more than 70 genes with established strain distribution patterns representing 12 autosomes and at least five unlinked markers. It is concluded that a major gene controlling aryl hydrocarbon hydroxylase inducibility by benzo[a]anthracene is located on chromosome 17. Because there is no significant linkage with any of three biochemical markers in the upper third of the chromosome, we conclude that the inducibility gene is located in the distal 40% of mouse chromosome 17. Whether this trait represents the Ah locus, i.e., the gene encoding the cytosolic Ah receptor, will require further study. Levgraverend C, Karenlampi SO, Bigelow SW, Lalley PA, Kozak CA, Womack JE, Nebert DW Aryl hydrocarbon hydroxylase induction by benzo[a]anthracene: regulatory gene localized to the distal portion of mouse chromosome 17 Genetics 107(3) 447-461 Jul 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6547399&dopt=Abstract 6547399 01 5 wks 35 MF 5 fmol/mg cytosolic protein 38 0.5 57 0.5 9.0 50 46 1 39 1 43 66 1 12 65 1 2 0.5 1 1 0.5 60 1 2 42 41 0.5 0.5 6/25/2003 MK Sullivan MK Sullivan 6547399.01 XenCSA levels on thymus cells [mean flourescence value =sum of products of each channel number times the number of cells in that channel divided by the number of cells counted] Rabbit antisera raised against rabbit corneal (SIRC) cells infected with xenotropic murine leukemia virus (MuLV)1 contain antibodies specific for antigens related to the major glycoproteins (gp70) of the xenotropic MuLV envelope (1). These antigens appear to be normal constituents of the cell surface of lymphocytes of all inbred mice and have been termed XenCSA-xenotropic MuLV envelope-related cell-surface antigens (1). The amount of XenCSA expressed on lymphocytes from various inbred strains differs greatly. Some strains, such as NZB, NZW, and DBA/2, express high levels of Xen CSA on both thymocytes and spleen cells whereas others, such as C57BL/6, NFS, and MA, express comparatively low levels of the antigen on both types of cells (1). To determine if quantitative expression of XenCSA is under genetic control, we have evaluated XenCSA levels in 24 recombinant inbred (RI) strains derived from crosses between DBA/2 and C57Bl/6 (2-7) as well as backcrosses of F1s to both parental strains. The results indicate that in this cross, Fv-1 or a closely linked gene on chromosome 4 has a major influence on XenCSA levels. Morse,III HC, Chused TM, Hartley JW, Mathieson BJ, Sharrow SO, Taylor BA Expression of xenotropic murine leukemia viruses as cell-surface gp70 in genetic crosses between strains DBA/2 and C57BL/6 J Exp Med 149(5) 1183-1196 May 1979 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=221612&dopt=Abstract 221612 01 6-16 wks 42 112 MF 2-10 Mean flourescence value=sum of products of each channel number times the number of cells in that channel divided by the number of cells counted 80 160 111 67 96 118 95 74 62 114 216 328 109 227 131 80 71 101 63 70 62 133 126 160 65 146 6/26/2003 MK Sullivan MK Sullivan 221612.01 XenCSA levels on spleen cells [mean flourescence value =sum of products of each channel number times the number of cells in that channel divided by the number of cells counted] Rabbit antisera raised against rabbit corneal (SIRC) cells infected with xenotropic murine leukemia virus (MuLV)1 contain antibodies specific for antigens related to the major glycoproteins (gp70) of the xenotropic MuLV envelope (1). These antigens appear to be normal constituents of the cell surface of lymphocytes of all inbred mice and have been termed XenCSA-xenotropic MuLV envelope-related cell-surface antigens (1). The amount of XenCSA expressed on lymphocytes from various inbred strains differs greatly. Some strains, such as NZB, NZW, and DBA/2, express high levels of Xen CSA on both thymocytes and spleen cells whereas others, such as C57BL/6, NFS, and MA, express comparatively low levels of the antigen on both types of cells (1). To determine if quantitative expression of XenCSA is under genetic control, we have evaluated XenCSA levels in 24 recombinant inbred (RI) strains derived from crosses between DBA/2 and C57Bl/6 (2-7) as well as backcrosses of F1s to both parental strains. The results indicate that in this cross, Fv-1 or a closely linked gene on chromosome 4 has a major influence on XenCSA levels. Morse,III HC, Chused TM, Hartley JW, Mathieson BJ, Sharrow SO, Taylor BA Expression of xenotropic murine leukemia viruses as cell-surface gp70 in genetic crosses between strains DBA/2 and C57BL/6 J Exp Med 149(5) 1183-1196 May 1979 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=221612&dopt=Abstract 221612 02 6-16 wks 42 112 MF 2-10 Mean flourescence value=sum of products of each channel number times the number of cells in that channel divided by the number of cells counted 120 464 261 104 156 189 180 151 126 291 430 493 250 345 340 107 143 215 110 194 120 308 208 405 110 451 6/26/2003 MK Sullivan MK Sullivan 221612.02 Endogenous serum amyloid P-comonent (SAP) levels [µg/ml] Recombinant inbred strains were used to demonstrate the existence of a major locus on chromosome 1, designated Sap, which controls the endogenous concentration of the mouse acute phase reactant, serum amyloid P-component (SAP). Levels of SAP were associated with alleles at the Ly-9 locus in two sets of RI strains: BXD (C57BL/6J X DBA/2) and BXH (C57BL/6J X C3H/HeJ). Low endogenous levels of SAP were present in the C57BL/6J progenitor strain and in most of the RI strains which inherited the Ly-9b allele. High levels of SAP were present in the DBA/2J and C3H/HeJ progenitors and in most of the RI strains which inherited the Ly-9a allele. In the BXD strains 91% of the genetic variation of SAP levels was accounted for by segregation at the Ly-9 locus while an additional 9% was attributed to genetic factors unlinked to Ly-9. In the BXH strains the percentage of genetic variation accounted for by Ly-9 segregation was reduced to 46%, while 54% was accounted for by other genetic factors. Because of background genetic variation it was not possible to detect any crossovers between Sap and Ly-9. However, in the BXD strains the linkage between Sap and Ly-9 appears to be quite close. The B6.C-H-25c congenic strain, which carries a segment of BALB/c chromosome 1 including the minor histocompatibility locus H-25 on a C57BL/6By background, had the same endogenous SAP level as the BALB/c donor strain. Mortensen RF, Le PT, Taylor BA Mouse serum amyloid p-component (SAP) levels controlled by a locus on chromosome 1 Immunogenetics 22(4) 367-375 1985 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=4054960&dopt=Abstract 4054960 01 4-8 wks 28 42 MF 8-10 µg/ml 38.8 3.1 230.8 17.3 31.5 7.0 137.1 7.6 195.2 20.3 39.8 3.8 204.7 11.7 176.0 14.9 106.6 2.8 19.0 3.2 47.2 7.3 76.2 24.7 30.9 5.2 36.3 5.8 43.6 5.7 37.1 4.5 63.5 12.9 249.0 32.3 65.7 13.2 188.1 17.4 144.3 14.6 135.9 8.9 137.7 12.0 41.3 5.6 244.3 34.9 26.6 7.1 233.5 15.1 6/26/2003 MK Sullivan MK Sullivan 4054960.01 Audiogeneic seizure - relative frequency of seizures [%] The difference in susceptibility to audiogenic seizures (AGS) between C57BL/6J and DBA/2J inbred strains of mice is due to multiple genetic factors. AGS susceptibility was tested in 21-day-old mice from classical crosses, BXD recombinant inbred (RI) strains, a congenic DBA/2N.B6N-Ahb inbred strain and crosses between the BXD RI strains and DBA/2J. Analysis of these data reveals that the variation in AGS susceptibility between these two strains results from allelic differences at three or more loci. Most of the variation is due to allelic differences at two loci. The first, Asp-1 (formerly Ias), is a major gene located on chromosome 12, between Ah and D12 Nyul. The second, Asp-2 (formerly asp), is a minor gene located on chromosome 4, tightly linked to b. The negative correlation of brain stem Ca2(+)-ATPase activity and AGS susceptibility in the BXD RI strains suggests that the strain difference in Ca2(+)-ATPase activity is inherited as a polygenic trait and that Asp-1 and Asp-2 are linked to, or identical to, factors that influence Ca2(+)-ATPase activity. Neumann PE, Seyfried TN. Mapping of two genes that influence susceptibility to audiogenic seizures in crosses of C57BL/6J and DBA/2J mice Behav Genet 20(2) 307-323 Mar 1990 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2141254&dopt=Abstract 2141254 02 20-22 days 20 22 MF 10-63 % of seizures 2 91 0 92 68 0 23 93 21 0 0 8 94 0 0 35 92 40 22 0 29 22 0 0 94 6/26/2003 MK Sullivan MK Sullivan 2141254.02 Red cell osmotic fragility [% lysis of red cells at 0.425% NaCl] Among normal mouse strains, natural genetic variation offers the potential to investigate the structure and function of cell membranes. One such polymorphism between C57BL/6J and DBA/2J is a difference in erythrocyte sensitivity to osmotic lysis. The genetic basis for erythrocyte osmotic fragility differences between mouse strains C57BL/6 and DBA/2 was examined through analyses of their serial backcross progeny, recombinant inbred (ri) strains (BXD), and congenic C57BL/6 strains with allelic differences at Hbb or Fv-2. The data indicate that the fragility difference between C57BL/6 and DBA/2 is the result of allelic differences at a minimum of two segregating loci. One of these might be linked to, but is not identical with the gene encoding the beta chain of hemoglobin (Hbb). Allelic differences at Fv-2, a gene known to control the proportion of erythroid precursors in the S phase, and at Hba, the structural locus of hemoglobin alpha chain also appear to exert no major influence on red cell osmotic fragility. Furthermore, the fact that red cells from one of the RI strans (BXD-31) are strikingly more resistant than those from the resistant parental strain DBA/2 leads to the conclusion that the degree of resistance/susceptibility for either strain is determined by the combined contributions of gene effects not all of which act in the same direction. We also found that red cells from strans C57BL/6 and DBA/2 differ in their uptake of 51Cr. This result suggests the possibility that red cell osmotic fragility differences may be due in part to differences in ion metabolism or membrane transport. Norman NK, Dewey MJ Genetic control of red cell osmotic fragility J Hered 76(1) 31-35 Jan-Feb 1985 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3980972&dopt=Abstract 3980972 01 12-14 84 98 Female 2-5 % 59.8 6.85 16.1 1.92 51.8 2.11 43.7 13.07 30.8 4.91 40.0 3.74 35.9 5.72 23.9 7.94 42.9 5.85 17.9 5.67 34.1 8.64 16.0 5.71 50.8 7.21 32.9 5.07 48.0 5.00 27.0 2.76 40.0 5.79 22.1 5.67 30.7 2.93 33.1 4.00 57.6 7.00 37.0 4.80 36.0 3.69 30.0 7.86 8.00 7.89 32.1 5.00 6/27/2003 MK Sullivan MK Sullivan 3980972.01 Total ATPase activity [µmol Pi/h/mg protein] Total, Mg2+, and Na+, K+ ATPase activities were studied in fresh brain homogenates of the audiogenic seizure (AGS)-resistant C57BL/6J (B6) and AGS-susceptible DBA/2J (D2) inbred strains and in 13 B6 X D2 (BXD) recombinant inbred (RI) strains. These activities were also studied in the D2.B6-Iasb congenic mice, that are similar genetically to D2 mice, except for the Iasb gene which inhibits the spread of AGS activity. The total and Mg2+ ATPase activities of the brainstem were significantly lower in the D2 than in the B6 mice at 21 days of age. No differences were found between these strains for Na+,K+ ATPase activity. The total, Mg2+, and Na+,K+ ATPase activities in the B6 brainstem did not change noticeably from 21 to 80 days of age. In the D2 brainstem, however, the Mg2+ activity increased with age, and the Na+,K+ ATPase activity decreased from 30 to 80 days of age. No genetic associations could be found between AGS susceptibility and total or Mg2+ ATPase activities in the D2.B6-Iasb mice or among the 13 BXD RI strains. Hence, differences in genetic background, rather than differences in AGS susceptibility, can account for the lower ATPase activities in 21-day-old D2 mice. Further, the Mg2+ and Na+,K+ ATPase activities appear to be regulated by more than one gene. This study emphasizes the utility of RI and congenic strains for testing the biochemical basis of AGS susceptibility in mice. Palayoor ST, Seyfried TN Genetic study of cationic ATPase activities and audiogenic seizure susceptibility in recombinant inbred and cogenic strains of mice J Neurochem 42(2) 529-533 Feb 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6141222&dopt=Abstract 6141222 01 20-22 days 20 22 MF 4-30 µmol Pi/h/mg protein 7.94 0.12 6.71 0.24 7.29 0.19 6.52 0.32 7.07 0.21 7.10 0.18 7.69 0.18 7.45 0.57 6.42 0.25 6.32 0.09 6.81 0.26 9.03 0.24 7.31 0.28 8.61 0.68 6.76 0.23 6/27/2003 MK Sullivan MK Sullivan 6141222.01 Mg2+ ATPase activity [µmol Pi/h/mg protein] Total, Mg2+, and Na+, K+ ATPase activities were studied in fresh brain homogenates of the audiogenic seizure (AGS)-resistant C57BL/6J (B6) and AGS-susceptible DBA/2J (D2) inbred strains and in 13 B6 X D2 (BXD) recombinant inbred (RI) strains. These activities were also studied in the D2.B6-Iasb congenic mice, that are similar genetically to D2 mice, except for the Iasb gene which inhibits the spread of AGS activity. The total and Mg2+ ATPase activities of the brainstem were significantly lower in the D2 than in the B6 mice at 21 days of age. No differences were found between these strains for Na+,K+ ATPase activity. The total, Mg2+, and Na+,K+ ATPase activities in the B6 brainstem did not change noticeably from 21 to 80 days of age. In the D2 brainstem, however, the Mg2+ activity increased with age, and the Na+,K+ ATPase activity decreased from 30 to 80 days of age. No genetic associations could be found between AGS susceptibility and total or Mg2+ ATPase activities in the D2.B6-Iasb mice or among the 13 BXD RI strains. Hence, differences in genetic background, rather than differences in AGS susceptibility, can account for the lower ATPase activities in 21-day-old D2 mice. Further, the Mg2+ and Na+,K+ ATPase activities appear to be regulated by more than one gene. This study emphasizes the utility of RI and congenic strains for testing the biochemical basis of AGS susceptibility in mice. Palayoor ST, Seyfried TN Genetic study of cationic ATPase activities and audiogenic seizure susceptibility in recombinant inbred and cogenic strains of mice J Neurochem 42(2) 529-533 Feb 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6141222&dopt=Abstract 6141222 02 20-22 days 20 22 MF 4-30 µmol Pi/h/mg protein 4.66 0.10 3.34 0.12 3.78 0.15 3.72 0.12 4.01 0.27 3.90 0.16 3.58 0.24 4.31 0.17 3.64 0.28 3.66 0.24 3.71 0.32 5.02 0.16 4.16 0.34 4.60 0.31 4.45 0.25 6/27/2003 MK Sullivan MK Sullivan 6141222.02 Na+, K+ ATPase activity [µmol Pi/h/mg protein] Total, Mg2+, and Na+, K+ ATPase activities were studied in fresh brain homogenates of the audiogenic seizure (AGS)-resistant C57BL/6J (B6) and AGS-susceptible DBA/2J (D2) inbred strains and in 13 B6 X D2 (BXD) recombinant inbred (RI) strains. These activities were also studied in the D2.B6-Iasb congenic mice, that are similar genetically to D2 mice, except for the Iasb gene which inhibits the spread of AGS activity. The total and Mg2+ ATPase activities of the brainstem were significantly lower in the D2 than in the B6 mice at 21 days of age. No differences were found between these strains for Na+,K+ ATPase activity. The total, Mg2+, and Na+,K+ ATPase activities in the B6 brainstem did not change noticeably from 21 to 80 days of age. In the D2 brainstem, however, the Mg2+ activity increased with age, and the Na+,K+ ATPase activity decreased from 30 to 80 days of age. No genetic associations could be found between AGS susceptibility and total or Mg2+ ATPase activities in the D2.B6-Iasb mice or among the 13 BXD RI strains. Hence, differences in genetic background, rather than differences in AGS susceptibility, can account for the lower ATPase activities in 21-day-old D2 mice. Further, the Mg2+ and Na+,K+ ATPase activities appear to be regulated by more than one gene. This study emphasizes the utility of RI and congenic strains for testing the biochemical basis of AGS susceptibility in mice. Palayoor ST, Seyfried TN Genetic study of cationic ATPase activities and audiogenic seizure susceptibility in recombinant inbred and cogenic strains of mice J Neurochem 42(2) 529-533 Feb 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6141222&dopt=Abstract 6141222 03 20-22 days 20 22 MF 4-30 µmol Pi/h/mg protein 3.28 0.11 3.37 0.14 3.51 0.20 2.92 0.39 3.06 0.31 3.20 0.19 4.11 0.36 3.14 0.42 2.79 0.38 2.66 0.26 3.10 0.22 4.01 0.23 3.15 0.13 4.01 0.43 2.31 0.13 6/27/2003 MK Sullivan MK Sullivan 6141222.03 Mean audiogenic seizure severity [severity of seizure] Total, Mg2+, and Na+, K+ ATPase activities were studied in fresh brain homogenates of the audiogenic seizure (AGS)-resistant C57BL/6J (B6) and AGS-susceptible DBA/2J (D2) inbred strains and in 13 B6 X D2 (BXD) recombinant inbred (RI) strains. These activities were also studied in the D2.B6-Iasb congenic mice, that are similar genetically to D2 mice, except for the Iasb gene which inhibits the spread of AGS activity. The total and Mg2+ ATPase activities of the brainstem were significantly lower in the D2 than in the B6 mice at 21 days of age. No differences were found between these strains for Na+,K+ ATPase activity. The total, Mg2+, and Na+,K+ ATPase activities in the B6 brainstem did not change noticeably from 21 to 80 days of age. In the D2 brainstem, however, the Mg2+ activity increased with age, and the Na+,K+ ATPase activity decreased from 30 to 80 days of age. No genetic associations could be found between AGS susceptibility and total or Mg2+ ATPase activities in the D2.B6-Iasb mice or among the 13 BXD RI strains. Hence, differences in genetic background, rather than differences in AGS susceptibility, can account for the lower ATPase activities in 21-day-old D2 mice. Further, the Mg2+ and Na+,K+ ATPase activities appear to be regulated by more than one gene. This study emphasizes the utility of RI and congenic strains for testing the biochemical basis of AGS susceptibility in mice. Palayoor ST, Seyfried TN Genetic study of cationic ATPase activities and audiogenic seizure susceptibility in recombinant inbred and cogenic strains of mice J Neurochem 42(2) 529-533 Feb 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6141222&dopt=Abstract 6141222 04 20-22 days 20 22 MF 4-30 Severity of seizure; 0=no response, 1=wild running, 2=clonic or tonic seizure 0.07 1.89 0.20 1.92 1.64 0.14 1.85 1.04 0.30 0.09 1.78 0.21 1.16 1.00 0.09 6/27/2003 MK Sullivan MK Sullivan 6141222.04 Clonic-tonic audiogenic seizure susceptibility [%] Total, Mg2+, and Na+, K+ ATPase activities were studied in fresh brain homogenates of the audiogenic seizure (AGS)-resistant C57BL/6J (B6) and AGS-susceptible DBA/2J (D2) inbred strains and in 13 B6 X D2 (BXD) recombinant inbred (RI) strains. These activities were also studied in the D2.B6-Iasb congenic mice, that are similar genetically to D2 mice, except for the Iasb gene which inhibits the spread of AGS activity. The total and Mg2+ ATPase activities of the brainstem were significantly lower in the D2 than in the B6 mice at 21 days of age. No differences were found between these strains for Na+,K+ ATPase activity. The total, Mg2+, and Na+,K+ ATPase activities in the B6 brainstem did not change noticeably from 21 to 80 days of age. In the D2 brainstem, however, the Mg2+ activity increased with age, and the Na+,K+ ATPase activity decreased from 30 to 80 days of age. No genetic associations could be found between AGS susceptibility and total or Mg2+ ATPase activities in the D2.B6-Iasb mice or among the 13 BXD RI strains. Hence, differences in genetic background, rather than differences in AGS susceptibility, can account for the lower ATPase activities in 21-day-old D2 mice. Further, the Mg2+ and Na+,K+ ATPase activities appear to be regulated by more than one gene. This study emphasizes the utility of RI and congenic strains for testing the biochemical basis of AGS susceptibility in mice. Palayoor ST, Seyfried TN Genetic study of cationic ATPase activities and audiogenic seizure susceptibility in recombinant inbred and cogenic strains of mice J Neurochem 42(2) 529-533 Feb 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6141222&dopt=Abstract 6141222 05 20-22 days 20 22 MF 4-30 % 1.8 91.4 0.0 92.0 68.0 0.0 93.0 21.0 0.0 0.0 82.2 0.0 40.0 22.0 0.0 6/27/2003 MK Sullivan MK Sullivan 6141222.05 Thymus to body size distribution [gmX103] Differences exist among inbred mouse strains in the size of the thymus relative to overall body size. These differences are controlled by several genes acting in different phases of thymus development. After 50 days of age, there is an approximately 2-fold difference in thymus size between C57BL/6J and AKR/J, and other strains (A/J, DBA/2J, BALB/cJ, CBA/J, C3H/HeJ, 129/J, C57BL/ 10J , MA/ MyJ ). The C57BL/6J and AKR/J mice have the larger thymus, and this characteristic is dominant in F1 animals derived from C57BL/6J and A/J strains. Studies on recombinant inbred strains derived from C57BL/6J and DBA/2J ( BXD strains), and C57BL/6J and A/J ( AXB and BXA strains) indicate that this difference is controlled by alleles at one locus, which we have designated Tsz -1 (thymus size 1). In the immediate postnatal period (0-23 days), while the relative size of the thymus is increasing, the thymus size of C57BL/6J mice is large relative to that of A/J mice, but the A/J character is dominant during this period, and this difference appears to be controlled by two genes. Peleg L, Nesbitt MN Genetic control of thymus size in inbred mice J Hered 75(2) 126-130 Mar-Apr 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6715864&dopt=Abstract 6715864 01 55-100 55 100 Male gm X103 1.80 0.491 0.82 0.423 1.10 0.402 1.72 0.388 0.91 0.205 1.70 0.200 1.14 0.139 1.11 0.293 1.72 0.533 0.95 0.242 1.10 0.494 0.90 0.202 2.17 0.587 1.05 0.243 1.20 0.335 1.12 0.335 1.25 0.238 1.16 0.588 1.82 0.429 1.22 0.487 7/7/2003 MK Sullivan MK Sullivan 6715864.01 Proliferation of A9.4 (subclone) without 50 µg/ml KLH experiment 1 [cpm] A T cell clone isolated from antigen-primed CB6/F1 mice was shown to proliferate to keyhole limpet hemocyanin (KLH) in the presence of irradiated syngeneic F1 spleen cells, as well as spleen cells from either parental strain (BALB/c and C57BL/6). The genetic restriction involved in this antigen-specific proliferation was mapped using BXD (C57BL/6 X DBA/2) recombinant inbred strains of mice to the Mls gene on chromosome one. To exclude the role of Ia antigens as the restricting determinants, monoclonal anti-Ia antibodies were used to block the in vitro proliferative response of this clone. Although anti-Iab and anti-Iad blocked the proliferation of this clone to KLH in the presence of irradiated spleen cells from either parent, this effect was shown to be dependent on Ia molecules passively absorbed by the T cell clone from the irradiated filler cells. Since the T clone expressed Thy-1.2 and Lyt-1+ differentiation markers, its helper activity was compared with other KLH carrier-specific clones in an in vitro antibody synthesis assay. The Mls-KLH-restricted T cell clone, in contrast to other carrier-specific, major histocompatibility complex (MHC)-restricted T cell clones, was unable to cooperate with trinitrophenyl (TNP)-primed B cells in the presence of TNP-KLH to generate an anti-TNP response. These experiments suggest that non-MHC determinants, such as autologous Mls gene products, may play a role in genetically restricted antigen recognition by T lymphocytes. Waters SJ, Waksal SD, Norton GP, Bona CA Antigen recognition by a t cell clone outside the context of the major histocompatibility complex J Exp Med 159(1) 305-312 Jan 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6198425&dopt=Abstract 6198425 01 6-8 wks 42 56 MF cpm 1107 77 925 71 2021 148 158 23 2267 340 108 16 1757 128 127 49 158 12 6/30/2003 MK Sullivan MK Sullivan 6198425.01 Proliferation of A9.4 (subclone) with 50 µg/ml KLH experiment 1, 5X105 stimulator cells [cpm] A T cell clone isolated from antigen-primed CB6/F1 mice was shown to proliferate to keyhole limpet hemocyanin (KLH) in the presence of irradiated syngeneic F1 spleen cells, as well as spleen cells from either parental strain (BALB/c and C57BL/6). The genetic restriction involved in this antigen-specific proliferation was mapped using BXD (C57BL/6 X DBA/2) recombinant inbred strains of mice to the Mls gene on chromosome one. To exclude the role of Ia antigens as the restricting determinants, monoclonal anti-Ia antibodies were used to block the in vitro proliferative response of this clone. Although anti-Iab and anti-Iad blocked the proliferation of this clone to KLH in the presence of irradiated spleen cells from either parent, this effect was shown to be dependent on Ia molecules passively absorbed by the T cell clone from the irradiated filler cells. Since the T clone expressed Thy-1.2 and Lyt-1+ differentiation markers, its helper activity was compared with other KLH carrier-specific clones in an in vitro antibody synthesis assay. The Mls-KLH-restricted T cell clone, in contrast to other carrier-specific, major histocompatibility complex (MHC)-restricted T cell clones, was unable to cooperate with trinitrophenyl (TNP)-primed B cells in the presence of TNP-KLH to generate an anti-TNP response. These experiments suggest that non-MHC determinants, such as autologous Mls gene products, may play a role in genetically restricted antigen recognition by T lymphocytes. Waters SJ, Waksal SD, Norton GP, Bona CA Antigen recognition by a t cell clone outside the context of the major histocompatibility complex J Exp Med 159(1) 305-312 Jan 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6198425&dopt=Abstract 6198425 02 6-8 wks 42 56 MF cpm 3457 137 3736 341 4568 302 209 140 5070 137 148 50 3990 97 381 106 86 45 6/30/2003 MK Sullivan MK Sullivan 6198425.02 Proliferation of A9.4 (subclone) without 50 µg/ml KLH experiment 2 [cpm] A T cell clone isolated from antigen-primed CB6/F1 mice was shown to proliferate to keyhole limpet hemocyanin (KLH) in the presence of irradiated syngeneic F1 spleen cells, as well as spleen cells from either parental strain (BALB/c and C57BL/6). The genetic restriction involved in this antigen-specific proliferation was mapped using BXD (C57BL/6 X DBA/2) recombinant inbred strains of mice to the Mls gene on chromosome one. To exclude the role of Ia antigens as the restricting determinants, monoclonal anti-Ia antibodies were used to block the in vitro proliferative response of this clone. Although anti-Iab and anti-Iad blocked the proliferation of this clone to KLH in the presence of irradiated spleen cells from either parent, this effect was shown to be dependent on Ia molecules passively absorbed by the T cell clone from the irradiated filler cells. Since the T clone expressed Thy-1.2 and Lyt-1+ differentiation markers, its helper activity was compared with other KLH carrier-specific clones in an in vitro antibody synthesis assay. The Mls-KLH-restricted T cell clone, in contrast to other carrier-specific, major histocompatibility complex (MHC)-restricted T cell clones, was unable to cooperate with trinitrophenyl (TNP)-primed B cells in the presence of TNP-KLH to generate an anti-TNP response. These experiments suggest that non-MHC determinants, such as autologous Mls gene products, may play a role in genetically restricted antigen recognition by T lymphocytes. Waters SJ, Waksal SD, Norton GP, Bona CA Antigen recognition by a t cell clone outside the context of the major histocompatibility complex J Exp Med 159(1) 305-312 Jan 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6198425&dopt=Abstract 6198425 03 6-8 wks 42 56 MF cpm 3765 805 4902 197 511 116 4413 328 593 419 2941 786 158 67 248 121 6/30/2003 MK Sullivan MK Sullivan 6198425.03 Proliferation of A9.4 (subclone) with 50 µg/ml KLH experiment 2, 1X106 stimulator cells [cpm] A T cell clone isolated from antigen-primed CB6/F1 mice was shown to proliferate to keyhole limpet hemocyanin (KLH) in the presence of irradiated syngeneic F1 spleen cells, as well as spleen cells from either parental strain (BALB/c and C57BL/6). The genetic restriction involved in this antigen-specific proliferation was mapped using BXD (C57BL/6 X DBA/2) recombinant inbred strains of mice to the Mls gene on chromosome one. To exclude the role of Ia antigens as the restricting determinants, monoclonal anti-Ia antibodies were used to block the in vitro proliferative response of this clone. Although anti-Iab and anti-Iad blocked the proliferation of this clone to KLH in the presence of irradiated spleen cells from either parent, this effect was shown to be dependent on Ia molecules passively absorbed by the T cell clone from the irradiated filler cells. Since the T clone expressed Thy-1.2 and Lyt-1+ differentiation markers, its helper activity was compared with other KLH carrier-specific clones in an in vitro antibody synthesis assay. The Mls-KLH-restricted T cell clone, in contrast to other carrier-specific, major histocompatibility complex (MHC)-restricted T cell clones, was unable to cooperate with trinitrophenyl (TNP)-primed B cells in the presence of TNP-KLH to generate an anti-TNP response. These experiments suggest that non-MHC determinants, such as autologous Mls gene products, may play a role in genetically restricted antigen recognition by T lymphocytes. Waters SJ, Waksal SD, Norton GP, Bona CA Antigen recognition by a t cell clone outside the context of the major histocompatibility complex J Exp Med 159(1) 305-312 Jan 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6198425&dopt=Abstract 6198425 04 6-8 wks 42 56 MF cpm 10955 777 11742 1564 781 1263 7541 786 378 126 10521 1445 150 72 421 55 6/30/2003 MK Sullivan MK Sullivan 6198425.04 Total serum thyroxine (T4) content [µg/100ml] We previously proposed that the audiogenic seizure (AGS) susceptibility of 21 +/- 1-day-old DBA/2 (D2) mice may result from an early postnatal elevation in serum thyroxine (T4) concentration. In the present study we used seven C57 X DBA (BXD) recombinant inbred strains and the D2.B6-Iasb congenic strain to study the association between serum T4 content and susceptibility to AGS. The D2.B6-Iasb congenic mice are genetically similar to the D2 mice except for the Iasb gene, which inhibits AGS susceptibility. The total and estimated free serum T4 concentrations in these strains at 14 +/- 1 days of age were compared with the previously determined AGS susceptibilities of these strains at 21 +/- 1 days of age. We found no significant correlations between serum T4 concentration and AGS susceptibility in these strains. It is unlikely, therefore, that inherited differences in neonatal serum T4 content are directly responsible for differences in susceptibility to AGS in 21 +/- 1-day-old mice. The mechanisms by which the experimental manipulation of serum T4 content influences AGS susceptibility are discussed. Seyfried TN, Glaser GH, Yu RK Genetic analysis of serum thyroxine content and audiogenic seizures in recombinant inbred and congenic strains of mice Exp Neurol 83(2) 423-428 Feb 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6363115&dopt=Abstract 6363115 01 13-15 days 13 15 MF 2-5 µg/100ml 6.7 0.5 10.3 1.1 10.2 6.0 6.2 8.6 8.7 7.3 9.9 6/30/2003 MK Sullivan MK Sullivan 6363115.01 Estimated free serum thyroxine (T4) content [µg/100ml] We previously proposed that the audiogenic seizure (AGS) susceptibility of 21 +/- 1-day-old DBA/2 (D2) mice may result from an early postnatal elevation in serum thyroxine (T4) concentration. In the present study we used seven C57 X DBA (BXD) recombinant inbred strains and the D2.B6-Iasb congenic strain to study the association between serum T4 content and susceptibility to AGS. The D2.B6-Iasb congenic mice are genetically similar to the D2 mice except for the Iasb gene, which inhibits AGS susceptibility. The total and estimated free serum T4 concentrations in these strains at 14 +/- 1 days of age were compared with the previously determined AGS susceptibilities of these strains at 21 +/- 1 days of age. We found no significant correlations between serum T4 concentration and AGS susceptibility in these strains. It is unlikely, therefore, that inherited differences in neonatal serum T4 content are directly responsible for differences in susceptibility to AGS in 21 +/- 1-day-old mice. The mechanisms by which the experimental manipulation of serum T4 content influences AGS susceptibility are discussed. Seyfried TN, Glaser GH, Yu RK Genetic analysis of serum thyroxine content and audiogenic seizures in recombinant inbred and congenic strains of mice Exp Neurol 83(2) 423-428 Feb 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6363115&dopt=Abstract 6363115 02 13-15 days 13 15 MF 2-5 µg/100ml 2.2 0.2 3.2 0.2 2.4 2.1 1.6 3.0 2.5 2.6 3.4 6/30/2003 MK Sullivan MK Sullivan 6363115.02 Mean seizure severity [severity of seizure] We previously proposed that the audiogenic seizure (AGS) susceptibility of 21 +/- 1-day-old DBA/2 (D2) mice may result from an early postnatal elevation in serum thyroxine (T4) concentration. In the present study we used seven C57 X DBA (BXD) recombinant inbred strains and the D2.B6-Iasb congenic strain to study the association between serum T4 content and susceptibility to AGS. The D2.B6-Iasb congenic mice are genetically similar to the D2 mice except for the Iasb gene, which inhibits AGS susceptibility. The total and estimated free serum T4 concentrations in these strains at 14 +/- 1 days of age were compared with the previously determined AGS susceptibilities of these strains at 21 +/- 1 days of age. We found no significant correlations between serum T4 concentration and AGS susceptibility in these strains. It is unlikely, therefore, that inherited differences in neonatal serum T4 content are directly responsible for differences in susceptibility to AGS in 21 +/- 1-day-old mice. The mechanisms by which the experimental manipulation of serum T4 content influences AGS susceptibility are discussed. Seyfried TN, Glaser GH, Yu RK Genetic analysis of serum thyroxine content and audiogenic seizures in recombinant inbred and congenic strains of mice Exp Neurol 83(2) 423-428 Feb 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6363115&dopt=Abstract 6363115 03 20-22 days 20 22 MF 2-5 Severity of seizure; 0=no response, 1=wild running, 2=clonic or tonic seizure 0.07 1.89 1.92 0.14 1.85 0.30 0.21 0.73 0.09 6/30/2003 MK Sullivan MK Sullivan 6363115.03 Percent clonic tonic seizure [%] We previously proposed that the audiogenic seizure (AGS) susceptibility of 21 +/- 1-day-old DBA/2 (D2) mice may result from an early postnatal elevation in serum thyroxine (T4) concentration. In the present study we used seven C57 X DBA (BXD) recombinant inbred strains and the D2.B6-Iasb congenic strain to study the association between serum T4 content and susceptibility to AGS. The D2.B6-Iasb congenic mice are genetically similar to the D2 mice except for the Iasb gene, which inhibits AGS susceptibility. The total and estimated free serum T4 concentrations in these strains at 14 +/- 1 days of age were compared with the previously determined AGS susceptibilities of these strains at 21 +/- 1 days of age. We found no significant correlations between serum T4 concentration and AGS susceptibility in these strains. It is unlikely, therefore, that inherited differences in neonatal serum T4 content are directly responsible for differences in susceptibility to AGS in 21 +/- 1-day-old mice. The mechanisms by which the experimental manipulation of serum T4 content influences AGS susceptibility are discussed. Seyfried TN, Glaser GH, Yu RK Genetic analysis of serum thyroxine content and audiogenic seizures in recombinant inbred and congenic strains of mice Exp Neurol 83(2) 423-428 Feb 1984 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6363115&dopt=Abstract 6363115 04 20-22 days 20 22 MF 2-5 % 1.8 91.4 92.0 0.0 93.0 0.0 0.0 35.0 0.0 6/30/2003 MK Sullivan MK Sullivan 6363115.04 D-amphetamine-induced core temperature change [degrees C] Two inbred strains of mice, DBA/2 and C57BL/6, differ in their responses to d-amphetamine-induced alteration of core temperature. At low doses of amphetamine (e.g., 2 mg/kg IP), both strains become markedly hypothermic within 10-20 minutes. High doses (e.g., 20 mg/kg IP) induce significant hyperthermia (+1.8 degrees C) in DBA/2 mice but have only a slight hyperthermic effect (+0.2-0.3 degrees C) effect on C57BL/6 mice. The phenotype of the F1 hybrid strain derived by crossing C57BL/6 by DBA/2 is indistinguishable from its C57BL/6 parent at a dose of 20 mg/kg IP, i.e., reduced responsiveness to amphetamine-induced hyperthermia is dominant. Analysis of the thermoregulatory responses of recombinant inbred derivatives (lines BXD-9, 11, 15, 19, 20, 21, 23, 27, 28, 30) suggest that the relative responses to amphetamine-induced hyperthermia is inherited in a simple Mendelian fashion. These results differ from other pairs of inbred mouse strains which have been compared. These findings identify yet another neuropharmacological difference between mouse strains C57BL/6 and DBA/2 and are reviewed in terms of neuroregulatory mechanisms effecting thermoregulation. Seale TW, Carney JM, Johnson P, Rennert OM Inheritance of amphetamine-induced thermoregulatory responses in in bred mice Pharmacol Biochem Behav 23(3) 373-377 Sep 1985 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=4048232&dopt=Abstract 4048232 01 8 wks 56 Male 6 degrees C 0.42 0.391 1.66 0.418 1.26 0.497 1.55 0.520 0.42 0.202 1.77 0.304 0.41 0.209 0.21 0.213 1.56 0.515 1.78 0.312 1.46 0.536 1.36 0.621 6/30/2003 MK Sullivan MK Sullivan 4048232.01 Anti-F antigen (liver protein) titer, experiment 1 [log10 of the reciprocal of the dilution of serum required to bind 50% of the labeled antigen] The immune response to the liver protein F antigen which, in the mouse, occurs in two allelic forms, is under sharp immunogenetic control in that only mice that possess the Ak molecule can respond to allo-F antigen. This response has been studied in a number of F1 hybrids between inbred strains and with recombinant inbred lines all of which express Ak, and which thus enable immune suppression effects to be detected. In the AKXL and AKXD sets the hybrids with CBA are responders if H-2k/H-2k, and usually nonresponders if H-2k/H-2b or H-2k/H-2d. Although this may be due to gene dosage effects, this cannot be the explanation for the low responsiveness of the H-2k/H-2b relative to the H-2k/H-2d mice found in CBA x BXD hybrids. For this, and other reasons, it seems likely that low responsiveness in any mouse possessing a responder Ak allele is due to suppression, and that this is mediated by the immune suppression effects of the non-H-2k haplotype. These H-2-mediated effects can be modified, both positively and negatively, by background genes. Thus, of the ten H-2k/H-2d members of the CBA x AKXD cross, seven are low responders and three are high responders. No other typed marker has the same strain distribution pattern at present. Major unresolved questions, therefore, concern the location and mechanism of action of the background genes and the mechanism of action of the H-2 immune suppression genes. Oliveira DB, Nardi NB Immune suppression genes contol the anti-F antigen response in F1 hybrids and recombinant inbred sets of mice Immunogenetics 26(6) 359-365 1987 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3117681&dopt=Abstract 3117681 01 MF 4-12 log10 of the reciprocal of the dilution of serum required to bind 50% of the labeled antigen 0.83 0.500 2.40 0.224 1.27 0.232 3.25 0.257 3.49 0.239 2.96 0.424 3.40 0.373 3.39 0.297 3.21 0.320 7/3/2003 MK Sullivan MK Sullivan 3117681.01 Anti-F antigen (liver protein) titer, experiment 2 The immune response to the liver protein F antigen which, in the mouse, occurs in two allelic forms, is under sharp immunogenetic control in that only mice that possess the Ak molecule can respond to allo-F antigen. This response has been studied in a number of F1 hybrids between inbred strains and with recombinant inbred lines all of which express Ak, and which thus enable immune suppression effects to be detected. In the AKXL and AKXD sets the hybrids with CBA are responders if H-2k/H-2k, and usually nonresponders if H-2k/H-2b or H-2k/H-2d. Although this may be due to gene dosage effects, this cannot be the explanation for the low responsiveness of the H-2k/H-2b relative to the H-2k/H-2d mice found in CBA x BXD hybrids. For this, and other reasons, it seems likely that low responsiveness in any mouse possessing a responder Ak allele is due to suppression, and that this is mediated by the immune suppression effects of the non-H-2k haplotype. These H-2-mediated effects can be modified, both positively and negatively, by background genes. Thus, of the ten H-2k/H-2d members of the CBA x AKXD cross, seven are low responders and three are high responders. No other typed marker has the same strain distribution pattern at present. Major unresolved questions, therefore, concern the location and mechanism of action of the background genes and the mechanism of action of the H-2 immune suppression genes. Oliveira DB, Nardi NB Immune suppression genes contol the anti-F antigen response in F1 hybrids and recombinant inbred sets of mice Immunogenetics 26(6) 359-365 1987 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3117681&dopt=Abstract 3117681 02 MF 6-12 log10 of the reciprocal of the dilution of serum required to bind 50% of the labeled antigen 1.07 0.331 1.03 0.563 2.36 0.312 1.76 0.518 1.65 0.511 1.81 0.493 1.92 0.503 0.76 0.500 2.41 0.225 2.11 0.402 2.31 0.321 2.39 0.321 7/3/2003 MK Sullivan MK Sullivan 3117681.02 Growth of syngeneic breast cancer tumors day 5 [mm3] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 05 12 months 365 Female 5 mm3 20.6 33.3 18.9 14.7 40.2 27.5 38.7 33.7 22.7 52.6 32.0 37.4 58.7 47.1 57.2 25.8 7/1/2003 MK Sullivan MK Sullivan 12209979.05 Growth of syngeneic breast cancer tumors day 10 [mm3] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 06 12 months 365 Female 5 mm3 42.5 35.0 34.1 41.3 54.3 45.3 73.1 44.7 40.7 119.6 84.2 53.2 106.0 87.3 131.1 50.4 7/1/2003 MK Sullivan MK Sullivan 12209979.06 Growth of syngeneic breast cancer tumors day 15 [mm3] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 07 12 months 365 Female 5 mm3 89.3 70.8 72.2 81.4 73.4 67.0 96.3 76.2 83.0 157.5 164.7 78.1 187.9 185.0 201.3 75.2 7/1/2003 MK Sullivan MK Sullivan 12209979.07 Growth of syngeneic breast cancer tumors day 20 [mm3] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 08 12 months 365 Female 5 mm3 41.4 106.3 52.8 43.2 139.3 112.5 149.7 119.6 52.2 279.2 263.1 170.0 198.3 266.7 279.2 127.0 7/1/2003 MK Sullivan MK Sullivan 12209979.08 Growth of syngeneic breast cancer tumors day 25 [mm3] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 09 12 months 365 Female 5 mm3 17.2 187.0 35.1 37.3 177.9 162.6 189.3 179.2 15.8 283.3 279.0 214.7 326.0 355.0 328.1 182.5 7/1/2003 MK Sullivan MK Sullivan 12209979.09 Growth of syngeneic breast cancer tumors day 30 [mm3] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 10 12 months 365 Female 5 mm3 212.9 14.4 19.2 224.9 188.3 252.3 173.0 358.4 369.6 231.3 388.5 504.3 460.5 222.0 7/1/2003 MK Sullivan MK Sullivan 12209979.1 Growth of syngeneic breast cancer tumors day 35 [mm3] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 11 12 months 365 Female 5 mm3 254.2 185.1 275.8 301.7 279.2 502.6 468.3 190.8 500.5 662.1 724.6 262.5 7/1/2003 MK Sullivan MK Sullivan 12209979.11 Growth of syngeneic breast cancer tumors day 40 [mm3] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 12 12 months 365 Female 5 mm3 315.6 70.2 335.5 135.3 303.6 112.6 329.1 7/1/2003 MK Sullivan MK Sullivan 12209979.12 Growth of syngeneic breast cancer tumors day 45 [mm3] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 13 12 months 365 Female 5 mm3 530.0 31.9 457.0 42.8 417.2 49.6 448.6 7/1/2003 MK Sullivan MK Sullivan 12209979.13 Growth of syngeneic breast cancer tumors day 50 [mm3] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 14 12 months 365 Female 5 mm3 672.5 1.3 537.1 14.3 504.3 20.9 623.0 7/1/2003 MK Sullivan MK Sullivan 12209979.14 Saccharin intakes post-saline, pre-exposed to saccharin, group 0 g/kg, residual mean [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 18 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake -0.12 0.10 0.16 0.09 -0.22 0.14 0.54 0.30 0.14 0.20 -0.00 0.08 -0.13 0.09 0.26 0.18 -0.06 0.11 -0.22 0.15 -0.16 0.12 0.20 0.12 0.40 0.14 -0.16 0.08 -0.16 0.24 0.11 0.26 -0.18 0.16 -0.56 0.13 -0.17 0.16 0.06 0.12 -0.15 0.19 0.36 0.12 7/2/2003 MK Sullivan MK Sullivan 9756038.18 Ethanol induced conditioned taste aversion to saccharin, group 2 g/kg, residual mean [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 19 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.13 0.09 0.05 0.10 0.04 0.16 0.33 0.32 -0.71 0.20 -0.18 0.12 0.12 0.13 -0.09 0.24 -0.24 0.07 -0.16 0.14 0.29 0.24 0.00 0.15 0.38 0.12 0.18 0.14 0.17 0.18 0.01 0.18 -0.30 0.16 -0.64 0.13 -0.00 0.12 -0.13 0.19 0.22 0.13 0.15 0.15 7/2/2003 MK Sullivan MK Sullivan 9756038.19 Ethanol induced conditioned taste aversion to saccharin, group 4 g/kg, residual mean [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 20 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.24 0.04 -0.48 0.11 0.22 0.18 0.28 0.16 -0.91 0.17 0.09 0.16 0.26 0.05 -0.13 0.31 0.06 0.10 0.03 0.12 -0.18 0.18 0.06 0.19 -0.03 0.19 0.55 0.11 0.49 0.18 0.08 0.20 -0.33 0.17 -0.41 0.09 0.17 0.16 0.08 0.20 -0.22 0.19 -0.30 0.18 7/2/2003 MK Sullivan MK Sullivan 9756038.2 Saccharin intake post EtOH no saccharin pre-exposure, group UP, residual mean [ml] Genetic differences in sensitivity to ethanol's aversive effects may play an important role in the development of alcohol-seeking behavior and alcoholism. The present study examined the development of ethanol-induced conditioned taste aversion in 20 BXD/Ty recombinant inbred strains of mice and their progenitor inbred strains, C57BL/6J (B6) and DBA/2J (D2). Adult male mice were given 1-hr access to a saccharin-flavored solution every 48 hr for 12 days. After all but the first and last saccharin access periods, they received ethanol injections (0, 2, or 4 g/kg, i.p.). Separate groups of unpaired control mice received 4 g/kg of ethanol 1 hr after water access. Saline control mice were also used for examining preference across a wide range of saccharin concentrations (0.019 to 4.864% w/v). As expected, saccharin consumption during taste conditioning declined over conditioning trials in a dose-dependent manner, indicating development of ethanol-induced conditioned taste aversion. Correlational analyses using strain means from recently published papers indicated no significant genetic correlation between taste conditioning and two phenotypes thought to reflect ethanol reinforcement or reward (ethanol drinking, conditioned place preference). However, there were significant genetic correlations between taste conditioning at the high dose and sensitivity to ethanol-induced hypothermia, rotarod ataxia, and acute withdrawal. Quantitative trait locus (QTL) analyses of strain means indicated that taste aversion was associated (p < 0.01) with genetic markers on nine chromosomes (1, 2, 3, 4, 6, 7, 9, 11, and 17). These QTLs were located near several candidate genes, including genes encoding several different acetylcholine receptor subunits, the delta opioid receptor, and two serotonin receptors (1B and 1D). QTLs for saccharin preference were located on several of the same chromosomes (2, 3, 4, 6, and 11). Two of these saccharin QTLs overlap candidate genes influencing sensitivity to sweet or bitter taste stimuli. In general, these findings support the conclusion that multiple genes influence ethanol-induced conditioned taste aversion. Some of these genes appear to influence taste sensitivity, whereas others appear to mediate sensitivity to aversive pharmacological effects of ethanol. Risinger FO, Cunningham CL Ethanol-induced conditioned taste aversion in BXD recombinant inbred mice Alcohol Clin Exp Res 22(6) 1234-1244 Sept 1998 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9756038&dopt=Abstract 9756038 98427469 21 56-125 days 56 125 Male 2-14 ml saccharin intake/total fluid intake 0.10 0.08 0.46 0.14 -0.14 0.14 -0.01 0.46 -0.16 0.19 0.06 0.08 -0.39 0.16 0.19 0.24 0.01 0.20 -0.08 0.13 -0.26 0.19 -0.00 0.17 0.43 0.19 -0.09 0.11 -0.12 0.30 0.01 0.21 -0.08 0.17 -0.52 0.09 0.09 0.15 -0.17 0.23 0.30 0.12 -0.13 0.17 7/2/2003 MK Sullivan MK Sullivan 9756038.21 Tyrosine hydroxylase neurons in ventral tegmental area [average cell number/section] BACKGROUND It has not been established to what extent the natural variation in dopamine systems contribute to the variation in ethanol response. The current study addresses this issue by measuring D dopamine (DA) receptor binding, the expression of, the number of midbrain DA neurons in the BXD recombinant inbred (RI) series and then compares these strain means with those previously reported for a variety of ethanol and other drug-related phenotypes.(2)METHODS Data were collected for 21 to 23 of the BXD RI strains and the parental strains. D DA receptor autoradiography was performed using I-epidepride as the ligand [ Kanes S, Dains K, Cipp L, Gatley J, Hitzemann B, Rasmussen E, Sanderson S, Silverman S, Hitzemann R (1996) Mapping the genes for haloperidol-induced catalepsy. J Pharmacol Exp Ther 277:1016-1025]. expression was measured using the Affymetrix oligoarray system. Immunocytochemical techniques were used to determine the number of midbrain DA neurons [Hitzemann B, Dains K, Hitzemann R (1994) Further studies on the relationship between dopamine cell density and haloperidol response. J Pharmacol Exp Ther 271:969-976].(2)RESULTS AND CONCLUSIONS The range of difference in receptor binding for the RI strains was approximately 2-fold in all regions examined, the core, the shell of the nucleus accumbens (NAc) and the dorsomedial caudate-putamen (CPu); heritability in all regions was moderate-( 2 approximately 0.35). expression in forebrain samples from the RI and parental strains ranged 1.5- to 2-fold and was moderate-0.47. Variation in the number of tyrosine hydroxylase (TH) positive neurons was moderate, 41% and 26% and was low-0.19 and 0.15 for the ventral tegmental area (VTA) and substantia nigra compacta (SNc), respectively. Significant correlations were found between D DA receptor binding and the low dose (1.33 g/kg) ethanol stimulant response. ( < 0.002) and between expression and conditioned place preference (CPP) ( < 0.0005). No significant correlations were detected between ethanol preference and either receptor binding or expression; however, a significant correlation was found between preference and expression. is approximately 0.2 Mb from. Overall, the data suggest ethanol preference and CPP are associated with the expression of or closely linked genetic loci.(2) Hitzemann R, Hitzemann B, Rivera S, Gatley J, Thanos P, Siming Shou LL, Williams RW Dopamine D2 receptor binding, Drd2 Expression and the number of dopamine neurons in the BXD recombinant inbred series: genetic relationships to alcohol and other drug associated phenotypes Alcohol Clin Exp Res 27(1) 1-11 Jan 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12543998&dopt=Abstract 12543998 04 Male 10-15 average cell number/section 94 2.4 110 2.4 78 1.5 93 1.8 93 3.4 94 1.9 95 2.0 81 1.9 91 1.5 89 1.6 98 1.5 92 1.8 92 2.2 102 1.9 105 3.6 101 1.7 89 2.3 86 1.4 91 2.0 93 3.7 100 2.3 99 1.6 74 3.2 85 1.6 86 1.8 78 0.6 82 1.8 78 1.6 7/2/2003 MK Sullivan MK Sullivan 12543998.04 Tyrosine hydroxylase neurons in substantia nigra compacta [average cell number/section] BACKGROUND It has not been established to what extent the natural variation in dopamine systems contribute to the variation in ethanol response. The current study addresses this issue by measuring D dopamine (DA) receptor binding, the expression of, the number of midbrain DA neurons in the BXD recombinant inbred (RI) series and then compares these strain means with those previously reported for a variety of ethanol and other drug-related phenotypes.(2)METHODS Data were collected for 21 to 23 of the BXD RI strains and the parental strains. D DA receptor autoradiography was performed using I-epidepride as the ligand [ Kanes S, Dains K, Cipp L, Gatley J, Hitzemann B, Rasmussen E, Sanderson S, Silverman S, Hitzemann R (1996) Mapping the genes for haloperidol-induced catalepsy. J Pharmacol Exp Ther 277:1016-1025]. expression was measured using the Affymetrix oligoarray system. Immunocytochemical techniques were used to determine the number of midbrain DA neurons [Hitzemann B, Dains K, Hitzemann R (1994) Further studies on the relationship between dopamine cell density and haloperidol response. J Pharmacol Exp Ther 271:969-976].(2)RESULTS AND CONCLUSIONS The range of difference in receptor binding for the RI strains was approximately 2-fold in all regions examined, the core, the shell of the nucleus accumbens (NAc) and the dorsomedial caudate-putamen (CPu); heritability in all regions was moderate-( 2 approximately 0.35). expression in forebrain samples from the RI and parental strains ranged 1.5- to 2-fold and was moderate-0.47. Variation in the number of tyrosine hydroxylase (TH) positive neurons was moderate, 41% and 26% and was low-0.19 and 0.15 for the ventral tegmental area (VTA) and substantia nigra compacta (SNc), respectively. Significant correlations were found between D DA receptor binding and the low dose (1.33 g/kg) ethanol stimulant response. ( < 0.002) and between expression and conditioned place preference (CPP) ( < 0.0005). No significant correlations were detected between ethanol preference and either receptor binding or expression; however, a significant correlation was found between preference and expression. is approximately 0.2 Mb from. Overall, the data suggest ethanol preference and CPP are associated with the expression of or closely linked genetic loci.(2) Hitzemann R, Hitzemann B, Rivera S, Gatley J, Thanos P, Siming Shou LL, Williams RW Dopamine D2 receptor binding, Drd2 Expression and the number of dopamine neurons in the BXD recombinant inbred series: genetic relationships to alcohol and other drug associated phenotypes Alcohol Clin Exp Res 27(1) 1-11 Jan 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12543998&dopt=Abstract 12543998 05 Male 10-15 average cell number/section 142 2.0 173 2.4 125 2.5 132 2.3 117 5.3 135 1.8 124 3.0 129 1.8 136 1.5 127 1.5 140 1.7 148 2.1 141 1.7 142 1.7 147 3.3 142 1.9 135 2.0 136 2.2 142 2.0 136 2.2 136 2.1 130 2.2 129 2.8 132 2.1 127 1.5 118 1.92 129 2.0 118 2.5 7/2/2003 MK Sullivan MK Sullivan 12543998.05 BEC after ethanol injection, 1.5 g/kg (raises BEC to ~1.5 mg EtOH/ml blood and then stabilize with daily pyrazole injections), mg/ml Male mice from C57BL/6J (B6), DBA/2J (D2) and their 25 recombinant inbred (RI) strains were exposed to ethanol (EtOH) vapor (3.0-9.0 mg EtOH/liter of air) for 72 hr. Mice were selected such that each strain averaged 1.34 to 1.59 mg of EtOH/ml of blood on withdrawal. Control groups and EtOH-exposed groups were tested hourly for handling-induced convulsions (HIC) for 10 hr and at hr 24 and 25. Strain withdrawal severity was indexed as the area under the 25-hr HIC curve for the EtOH group minus that strain's equivalent value for the control group. Genome-wide quantitative trait locus (QTL) analyses correlating strain means with allelic status at > 1500 markers identified 10 chromosomal regions at P < .01. These provisionally identified QTLs were on chromosomes 1 (2 QTLs), 3, 9 (2 QTLs), 10, 12, 13, 15 and 18. Multiple regression analysis using the four most influential QTLs revealed that these loci controlled 86% of the genetic variance. A QTL mapped to distal chromosome 1 (P < .001) is in the same region as one previously definitively mapped for acute alcohol withdrawal, as well as one mapped for acute pentobarbital withdrawal. Several of the QTLs map near potential candidate genes. These provisional linkages will now be confirmed or rejected using additional genetically segregating populations. Crabbe JC Provisional mapping of quantitative trait loci for chronic ethanol withdrawal severity in BXD recombinant inbred mice J Pharmacol Exp Ther 286(1) 263-271 Jul 1998 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9655868&dopt=Abstract 9655868 04 Male 3-52 mg/ml 1.51 0.09 1.50 0.06 1.51 0.18 1.53 0.11 1.48 0.21 1.47 0.14 1.49 0.14 1.52 0.15 1.50 0.12 1.51 0.07 1.54 0.13 1.50 0.11 1.53 0.16 1.49 0.10 1.49 0.13 1.49 0.10 1.50 0.09 1.48 0.09 1.34 0.60 1.49 0.09 1.59 0.34 1.51 0.12 1.50 0.19 1.49 0.08 1.54 0.12 1.51 0.09 1.51 0.09 7/2/2003 MK Sullivan MK Sullivan 9655868.04 Mean audiogenic seizure severity [severity of seizure] Mice of some inbred strains, such as 21-day-old DBA/2J mice, have generalized convulsions when exposed to intense auditory stimulation. Analysis of susceptibility to audiogenic seizures in BXD recombinant inbred strains has demonstrated the influence of at least three loci. One locus, Asp-1, is located on chromosome 12 between Ah and D12Nyu1; another locus, Asp-2, is on chromosome 4, tightly linked to b. Here we report evidence that Asp-2 is located within an 8-centimorgan segment distal to b and that Asp-3 is linked to Mtv-1 on chromosome 7. We also present evidence that these three loci account for most of the heritable variation in susceptibility to audiogenic seizures in crosses of DBA/2J and C57BL/6J mice and that susceptibility to audiogenic seizures is influenced by genomic imprinting. Thus, genomic imprinting may complicate linkage and mapping studies and should be considered in analyses of complex modes of inheritance. Neumann PE, Collins RL Genetic dissection of susceptibility to audiogenic seizures in inbred mice. Proc Natl Acad Sci 88(12) 5408-5412 Jun 1991 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2052619&dopt=Abstract 2052619 02 21 days 21 MF Severity of seizure; 0=no response, 1=wild running, 2=clonic or tonic seizure 0.07 1.88 0.20 1.92 1.64 0.14 0.57 1.85 1.04 0.30 0.10 0.33 1.94 0.21 0.07 0.73 1.92 1.16 1.09 0.36 1.29 1.00 0.09 0.00 1.90 7/1/2003 MK Sullivan MK Sullivan 2052619.02 Tolerance or sensitization to ethanol effects on locomotor activity - Difference between experimental group (two prior exposures to 2g/kg ip EtOH) and saline control group, 4th conditioning day [activity counts/min] Genetic differences in ethanol's ability to induce conditioned place preference were studied in 20 BXD Recombinant Inbred (RI) mouse strains and in the C57BL/6J and DBA/2J progenitor strains. Male mice from each strain were exposed to a Pavlovian conditioning procedure in which a distinctive floor stimulus (CS+) was paired four times with ethanol (2 g/kg). A different floor stimulus (CS-) was paired with saline. Control mice were injected only with saline. Floor preference testing without ethanol revealed significant genetic differences in conditioned place preference, with some strains spending nearly 80% time on the ethanol-paired floor while others spent only 50% (i.e., no preference). Control mice showed genetic differences in unconditioned preference for the floor cues, but unconditioned preference was not genetically correlated with conditioned preference. There were also substantial genetic differences in ethanol-stimulated activity, but contrary to psychomotor stimulant theory, ethanol-induced activity on conditioning trials was not positively correlated with strength of conditioned place preference. However, there was a significant negative genetic correlation (r = -0.42) between test session activity and preference. Quantitative trait loci (QTL) analyses showed strong associations (P < 0.01) between conditioned place preference and marker loci on chromosomes 4, 8, 9, 18 and 19. Weaker associations (0.01 < P < 0.05) were identified on several other chromosomes. Analysis also yielded several significant QTL for unconditioned preference, ethanol-stimulated activity, and sensitization. Overall, these data support the conclusion that genotype influences ethanol-induced conditioned place preference, presumably via genetic differences in sensitivity to ethanol's rewarding effects. Moreover, several chromosomal regions containing candidate genes of potential relevance to ethanol-induced conditioned place preference have been identified. Cunningham CL Localization of genes influencing ethanol-induced conditioned place preference and locomotor activity in BXD recombinant inbred mice Psychopharmacology 120(1) 28-41 July 1995 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7480533&dopt=Abstract 7480533 96078685 17 56-125 days 56 125 Male 13-34 activity counts/min 17.954 3.97 112.444 7.61 36.212 8.40 30.788 4.90 27.695 3.25 10.331 2.50 94.338 10.07 85.444 6.48 37.384 6.78 11.907 3.66 46.397 6.39 52.106 6.28 11.656 3.10 3.311 2.87 57.404 6.93 67.040 7.54 41.583 3.86 41.868 5.29 66.298 9.60 99.001 12.7 21.788 5.10 46.616 7.63 7/3/2003 MK Sullivan MK Sullivan 7480533.17 Leukocyte infiltration in metastatic breast tumor, day 5 [measured on scale of 0=no leukocyte infiltration and no destruction of implanted tumor cell to 4=most severe] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 15 12 months 365 Female 5 Measured on scale of 0=no leukocyte infiltration and no destruction of implanted tumor cell to 4=most severe 2.07 0.156 0.91 0.113 2.52 0.498 2.64 0.406 0.49 0.505 0.25 0.251 1.51 0.502 1.92 0.108 0.99 0.079 6/30/2003 MK Sullivan MK Sullivan 12209979.15 Leukocyte infiltration in metastatic breast tumor, day 12 [measured on scale of 0=no leukocyte infiltration and no destruction of implanted tumor cell to 4=most severe] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 16 12 months 365 Female 5 Measured on scale of 0=no leukocyte infiltration and no destruction of implanted tumor cell to 4=most severe 3.63 0.101 0.81 0.207 3.34 0.294 3.28 0.054 2.73 0.297 1.00 0.498 1.97 0.149 0.78 0.242 3.32 0.397 0.30 0.108 1.82 0.197 0.62 0.092 1.07 0.152 6/30/2003 MK Sullivan MK Sullivan 12209979.16 Leukocyte infiltration in metastatic breast tumor, day 30 [measured on scale of 0=no leukocyte infiltration and no destruction of implanted tumor cell to 4=most severe] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 17 12 months 365 Female 5 Measured on scale of 0=no leukocyte infiltration and no destruction of implanted tumor cell to 4=most severe 2.12 0.117 2.37 0.162 2.71 0.197 3.55 0.100 3.34 0.210 2.84 0.194 3.39 0.340 0.50 0.491 6/30/2003 MK Sullivan MK Sullivan 12209979.17 T cell infiltration at tumor site in breast cancer cells, day 5 [measured on scale of 0=no T-cell infiltration and no destruction of implanted tumor cell to 4=most severe] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 18 12 months 365 Female 5 Measured on scale of 0=no T cell infiltration and no destruction of implanted tumor cell to 4=most severe 0.86 0.062 2.02 0.210 1.93 0.288 1.66 0.155 6/30/2003 MK Sullivan MK Sullivan 12209979.18 T cell infiltration at tumor site in breast cancer cells, day 1 [measured on scale of 0=no T-cell infiltration and no destruction of implanted tumor cell to 4=most severe] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 19 12 months 365 Female 5 Measured on scale of 0=no T cell infiltration and no destruction of implanted tumor cell to 4=most severe 3.64 0.116 1.13 0.098 3.33 0.295 3.28 0.051 1.72 0.295 1.52 0.000 1.46 0.348 1.27 0.239 3.85 0.102 1.82 0.207 0.47 0.068 1.07 0.157 6/30/2003 MK Sullivan MK Sullivan 12209979.19 T cell infiltration at tumor site in breast cancer cells, day 30 [measured on scale of 0=no T-cell infiltration and no destruction of implanted tumor cell to 4=most severe] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 20 12 months 365 Female 5 Measured on scale of 0=no T cell infiltration and no destruction of implanted tumor cell to 4=most severe 1.62 0.594 2.37 0.166 2.73 0.192 3.52 0.106 0.18 0.046 3.69 0.160 0.29 0.114 2.34 0.307 3.38 0.364 0.24 0.000 6/30/2003 Mk Sullivan MK Sullivan 12209979.2 Apoptosis of breast tumor cells, day 12 [measured on scale of 0=no apoptosis infiltration and no destruction of implanted tumor cell to 4=most severe] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 21 12 months 365 Female 5 Measured on scale of 0=no apoptosis infiltration and no destruction of implanted tumor cell to 4=most severe 3.50 0.302 0.30 0.108 3.31 0.289 3.26 0.050 0.10 0.166 0.82 0.102 0.83 0.042 0.61 0.203 3.37 0.347 1.09 0.219 0.70 0.206 6/30/2003 MK Sullivan MK Sullivan 12209979.21 Apoptosis of breast tumor cells, day 30 [measured on scale of 0=no apoptosis infiltration and no destruction of implanted tumor cell to 4=most severe] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 22 12 months 365 Female 5 Measured on scale of 0=no apoptosis infiltration and no destruction of implanted tumor cell to 4=most severe 1.11 0.102 2.35 0.148 2.21 0.277 2.85 0.105 0.46 0.037 2.40 0.081 1.81 0.206 3.09 0.00 0.30 0.308 6/30/2003 MK Sullivan MK Sullivan 12209979.22 Mixed lymphocyte reaction (MLR) with BALB/c spleen cells [cpm stimulated/cpm unstimulated] To develop a better animal model for studying the effects of the host environment in neoplasia, we injected various genetically well-characterized H-2(d) RI strains of BXD mice with syngeneic breast cancer cells (TS/A) and monitored the growth of tumors over time. There was a marked difference in the growth of the implanted breast cancer cells among the 14 BXD RI strains, with 4 patterns of tumor development being observed: in type I, the implanted tumor cells grew rapidly in the first 2 weeks, necrosis of the tumors was observed and metastases to the intestinal lymph nodes and pancreas was observed, causing death; in type II, the implanted tumor cells grew slowly and attained a size after day 50 that required killing the animal, with tumor necrosis being rare and metastases absent; in type III, the implanted tumor cells grew initially but underwent a slow decline after 4 weeks; and in type IV, the implanted tumor cells failed to develop. Apoptosis of the implanted tumor cells was responsible for the regression of tumor nodules. The T-cell immune response minimized tumor development in types III and IV since T-cell depletion of the BXD RI mice resulted in aggressively growing tumors in these strains. Grizzle WE, Mountz JD, Yang PA, Xu X, Sun S, Van Zant GE, Williams RW, Hsu HC, Zhang HG. BXD recombinant inbred mice represent a novel T cell-mediated immune response tumor model. Int J Cancer 101(3) 270-279 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12209979&dopt=Abstract 12209979 23 12 months 365 Female 5 cpm stimulated/cpm unstimulated 1.59 0.395 1.79 0.329 55.00 11.272 1.33 0.316 1.40 0.285 1.67 3.73 43.62 8.048 2.44 0.474 2.25 0.307 7.72 1.368 6/30/2003 MK Sullivan MK Sullivan 12209979.23 Brain to Body ratio Adult C57BL/6J (B6) male mice had 37% heavier brains than did DBA/2J (D2) mice, while their body weights did not differ. The BXD recombinant inbred (RI) series of 20 strains, derived from a cross between B6 and D2 inbred strains, was used as the initial screen to determine significant associations between male brain weight and brain:body weight ratio, with allelic variation at 360 known marker gene loci. For brain weight, this yielded five candidate chromosome regions, each reflecting a possible quantitative trait locus (QTL) site affecting brain weight. The second step was to test as many of these five as possible using standard (non-RI) inbred strain data for brain weight previously reported in the literature. For this purpose, only strains possessing the same alleles as the B6 or D2 strains were used. Sufficient data to test two of the five candidate QTL were available. Of these, one was strongly supported as a site affecting brain weight--the D7rp2 region of chromosome 7. For the brain to body weight ratio, four chromosome regions emerged as significantly associated in the BXD series, but none were amenable to testing due to a lack of allelic information for the standard inbred strains. However, two of these regions showed highly significant associations (p less than 0.001, single test) that merit consideration as QTL sites for future testing. These two are the Hba region on chromosome 11 and the D17Tu7 region on chromosome 17. The genetic correlation between brain and body weight was low (r = 0.28), indicating that these two traits are largely genetically independent in the BXD RI series. Belknap JK, Phillips TJ, O'Toole LA. Quantitative trait loci associated with brain weight in the BXD/Ty recombinant inbred mouse strains Brain Res Bul 29(3-4) 337-344 Sept-Oct 1992 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1393606&dopt=Abstract 1393606 03 11-13 wks 77 91 Male 7-8 0.0183 0.0014 0.0134 0.0016 0.0163 0.0011 0.0138 0.0012 0.0183 0.0011 0.145 0.0007 0.0160 0.0006 0.0154 0.0010 0.0164 0.0006 0.0138 0.0011 0.0145 0.0006 0.0155 0.0008 0.0163 0.0009 0.0149 0.0009 0.0145 0.0016 0.0172 0.0004 0.0179 0.0017 0.0153 0.0010 0.0161 0.0016 0.0152 0.0012 0.0148 0.0011 0.0153 0.0015 7/7/2003 MK Sullivan MK Sullivan 1393606.03 B-mannosidase activity in liver of Female [mg p-nitrophenl liberated/g tissue wet weight/hr at 37 degrees C] A gene (Bmn) with a major effect on beta-mannosidase activity in kidney and liver of the house mouse was revealed by assay with the synthetic substrate p-nitrophenyl-beta-D-mannoside. Activity is low in DBA/2J and CSB mice and high in C57BL/6J mice. By the use of the BXD series of recombinant inbred strains and by crosses between C57BL and CSB, it was possible to map the gene to the distal part of chromosome 3 by demonstration of linkage to a gene for cadmium resistance, cdm, as well as to the Adh-3 locus. Lundin LG A gene (Bmn) controlling B-mannosidase activity in the mouse is located in the distal part of chromosome 3 Biochem Genet 25(7-8) 603-610 Aug 1987 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3447593&dopt=Abstract 3447593 01 Female mg p-nitrophenl liberated/g tissue wet weight/hr at 37 degrees C 2.187 1.734 1.676 1.536 2.741 1.633 1.051 1.813 1.439 1.466 1.956 2.548 2.717 1.524 1.460 1.608 1.829 1.658 1.732 2.529 1.636 2.567 2.275 1.304 7/8/2003 MK Sullivan MK Sullivan 3447593.01 Seizure threshold pressure at compression rate of 100 atm hr-1 (100iPc) [atm] Most mammals tested, when exposed to increasing pressure in helium/oxygen atmospheres, exhibit progressive motor disturbances culminating in two, usually successive, well-differentiated convulsive seizures. The seizures are highly reproducible components of the constellation of events that collectively constitute the High Pressure Neurologic Syndrome (HPNS). In the present study, we present evidence that the mean difference in seizure threshold pressures of the first seizure to occur (HPNS Type I) between inbred mouse strains DBA/2J and C57BL/6J is predominantly determined (greater than 60%) by the expression of a major locus-possibly linked to the H-2 locus on chromosome 17- and a minor locus, probably unlinked. This outcome is derived from applications of the maximum likelihood modeling procedure of ELSTON and STEWART (1973) and STEWART and ELSTON (1973) to eleven models of genetic determinacy and tests (including breeding tests) of "preferred" models so derived using BXD recombinant inbred strains that show the following: The major locus exhibits conditional dominance characteristics depending upon compression rate and minor locus genotype. At a constant mean compression rate of 100 atm hr-1, the major locus manifests strong, though incomplete, dominance apparently independent of minor locus genotype. Its expression is, however, highly sensitive to compression rate, losing its dominance altogether at a linear rate of 1,000 atm hr-1. The major locus interacts with the weakly dominant and relatively compression-rate-insensitive minor locus to retain dominance at fast compression only when the dominant alleles of both loci are present. A principal finding of this study is that employing two compression rates permits fuller genetic characterization of murine high-pressure seizure susceptibility differences than could be achieved by use of a single compression rate. McCall RD, Frierson D Jr. Evidence that two loci predominantly determine the difference in susceptibility to the high pressure neurologic syndrome type 1 seizure in mice Genetics 99(2) 285-307 Oct 1981 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7341354&dopt=Abstract 7341354 01 35-80 days 35 80 MF atm 89.1 69.9 89.7 89.0 71.5 81.8 82.9 74.5 77.0 83.0 81.7 72.0 88.9 85.8 84.9 89.0 82.0 72.9 76.7 74.5 84.3 89.9 73.1 7/8/2003 MK Sullivan MK Sullivan 7341354.01 Seizure threshold pressure at compression rate of 1000 atm hr-1 (1000iPc) [atm] Most mammals tested, when exposed to increasing pressure in helium/oxygen atmospheres, exhibit progressive motor disturbances culminating in two, usually successive, well-differentiated convulsive seizures. The seizures are highly reproducible components of the constellation of events that collectively constitute the High Pressure Neurologic Syndrome (HPNS). In the present study, we present evidence that the mean difference in seizure threshold pressures of the first seizure to occur (HPNS Type I) between inbred mouse strains DBA/2J and C57BL/6J is predominantly determined (greater than 60%) by the expression of a major locus-possibly linked to the H-2 locus on chromosome 17- and a minor locus, probably unlinked. This outcome is derived from applications of the maximum likelihood modeling procedure of ELSTON and STEWART (1973) and STEWART and ELSTON (1973) to eleven models of genetic determinacy and tests (including breeding tests) of "preferred" models so derived using BXD recombinant inbred strains that show the following: The major locus exhibits conditional dominance characteristics depending upon compression rate and minor locus genotype. At a constant mean compression rate of 100 atm hr-1, the major locus manifests strong, though incomplete, dominance apparently independent of minor locus genotype. Its expression is, however, highly sensitive to compression rate, losing its dominance altogether at a linear rate of 1,000 atm hr-1. The major locus interacts with the weakly dominant and relatively compression-rate-insensitive minor locus to retain dominance at fast compression only when the dominant alleles of both loci are present. A principal finding of this study is that employing two compression rates permits fuller genetic characterization of murine high-pressure seizure susceptibility differences than could be achieved by use of a single compression rate. McCall RD, Frierson D Jr. Evidence that two loci predominantly determine the difference in susceptibility to the high pressure neurologic syndrome type 1 seizure in mice Genetics 99(2) 285-307 Oct 1981 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7341354&dopt=Abstract 7341354 02 35-80 days 35 80 MF atm 79.8 62.6 65.9 80.6 67.6 77.4 66.7 66.1 67.3 68.8 79.9 67.6 71.4 80.0 77.9 77.2 80.5 65.3 63.4 67.4 71.1 78.7 64.3 7/8/2003 MK Sullivan MK Sullivan 7341354.02 Mean water consumption, water offered vs. 10 % ethanol [ml] The genomic map locations of specific genes controlling behaviors can be identified by studying a panel of recombinant inbred (RI) mouse strains. The progenitor C57BL/6J (B6) and DBA/2J (D2) strains, and 19 of the BXD RI strains derived from an F2 cross of these progenitors, were tested for 3% and 10% ethanol (EtOH) intake. The test sequence began with two-bottle free choice between tap water and unsweetened ethanol, and ended with free choice between water and saccharin-sweetened ethanol. Saccharin preference was also measured. Correlational analyses indicated that 59% of the genetic variance in 10% ethanol and sweetened 10% ethanol consumption was held in common, 24% of the genetic variance in saccharin and sweetened 10% ethanol consumption was held in common, and only 7% of the genetic variance in saccharin and unsweetened 10% ethanol consumption was held in common. These percentages for 3% ethanol solutions were 21%, 36%, and 14%. In addition, the severity of handling-induced convulsions during ethanol withdrawal was found to be significantly associated with the amount of ethanol consumed from the sweetened ethanol drinking tubes, suggesting that genetic differences in avidity for ethanol could lead to the development of physical dependence. Quantitative trait loci (QTL) analyses revealed that several genetic markers were associated with ethanol consumption levels, including markers for the D2 dopamine receptor. QTL analyses of saccharin and sweetened ethanol consumption identified the sac locus, thought to determine the ability to detect saccharin. In general, our results suggest that saccharin and ethanol consumption are determined by the actions of multiple genes (QTL), some in common, and suggest specific map locations of several such QTL on the mouse genome. Phillips TJ, Crabbe JC, Metten P, Belknap JK. Localization of genes affecting alcohol drinking in mice. Alcohol Clin Exp Res 18(4) 931-941 Aug 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7978106&dopt=Abstract 7978106 08 51-125 days 51 125 Female 10-18 ml 4.82 0.514 2.25 0.400 4.65 0.708 3.54 0.603 3.75 0.402 4.23 0.517 3.06 0.308 4.64 0.410 6.82 0.301 3.55 0.610 4.13 0.615 4.95 0.310 4.65 0.508 4.45 0.402 4.54 0.505 2.35 0.302 3.63 0.419 3.05 0.604 5.55 0.514 2.36 0.500 5.25 0.606 7/11/2003 MK Sullivan MK Sullivan 7978106.08 Mean water consumption, water offered vs. 0.2 % saccharin [ml] The genomic map locations of specific genes controlling behaviors can be identified by studying a panel of recombinant inbred (RI) mouse strains. The progenitor C57BL/6J (B6) and DBA/2J (D2) strains, and 19 of the BXD RI strains derived from an F2 cross of these progenitors, were tested for 3% and 10% ethanol (EtOH) intake. The test sequence began with two-bottle free choice between tap water and unsweetened ethanol, and ended with free choice between water and saccharin-sweetened ethanol. Saccharin preference was also measured. Correlational analyses indicated that 59% of the genetic variance in 10% ethanol and sweetened 10% ethanol consumption was held in common, 24% of the genetic variance in saccharin and sweetened 10% ethanol consumption was held in common, and only 7% of the genetic variance in saccharin and unsweetened 10% ethanol consumption was held in common. These percentages for 3% ethanol solutions were 21%, 36%, and 14%. In addition, the severity of handling-induced convulsions during ethanol withdrawal was found to be significantly associated with the amount of ethanol consumed from the sweetened ethanol drinking tubes, suggesting that genetic differences in avidity for ethanol could lead to the development of physical dependence. Quantitative trait loci (QTL) analyses revealed that several genetic markers were associated with ethanol consumption levels, including markers for the D2 dopamine receptor. QTL analyses of saccharin and sweetened ethanol consumption identified the sac locus, thought to determine the ability to detect saccharin. In general, our results suggest that saccharin and ethanol consumption are determined by the actions of multiple genes (QTL), some in common, and suggest specific map locations of several such QTL on the mouse genome. Phillips TJ, Crabbe JC, Metten P, Belknap JK. Localization of genes affecting alcohol drinking in mice. Alcohol Clin Exp Res 18(4) 931-941 Aug 1994 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7978106&dopt=Abstract 7978106 09 51-125 days 51 125 Female 10-18 ml 1.40 0.696 0.38 0.221 4.75 0.919 1.86 0.514 0.11 0.00 0.73 0.416 1.10 0.526 0.49 0.190 1.79 0.806 0.79 0.520 1.51 0.517 0.70 0.318 1.08 0.542 0.39 0.227 2.60 0.787 0.09 0.000 0.20 0.114 0.60 0.215 0.49 0.314 1.41 0.507 0.70 0.424 7/11/2003 MK Sullivan MK Sullivan 7978106.09 Total fluid intake during forced alcohol exposure period [mls/day] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 01 8 wks 56 MF 3-9 mls/day 5.23 0.226 4.96 0.257 6.39 0.327 4.65 0.226 6.07 0.142 4.38 0.161 5.39 0.368 5.09 0.510 6.62 0.296 7/11/2003 MK Sullivan MK Sullivan 8651451.01 Total fluid intake during free choice alcohol period [mls/day] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 02 8 wks 56 MF 3-9 mls/day 6.06 0.248 6.64 0.182 2.50 0.146 5.26 0.224 7.04 0.273 6.02 0.272 6.35 0.242 5.89 0.330 7.19 0.14 7/11/2003 MK Sullivan MK Sullivan 8651451.02 Mean alcohol preference during free choice period for males [mls 10 % ethanol/mls total fluid] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 03 8 wks 56 Male 18-20 mls 10 % ethanol/mls total fluid 0.83 0.027 0.16 0.019 0.27 0.042 0.83 0.026 0.24 0.068 0.43 0.106 0.79 0.073 0.24 0.071 0.16 0.012 7/11/2003 MK Sullivan MK Sullivan 8651451.03 Mean alcohol preference during free choice period for females [mls 10 % ethanol/mls total fluid] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 04 8 wks 56 Female 18-20 mls 10 % ethanol/mls total fluid 0.81 0.030 0.14 0.011 0.48 0.063 0.71 0.046 0.46 0.083 0.29 0.105 0.63 0.064 0.45 0.099 0.19 0.028 7/11/2003 MK Sullivan MK Sullivan 8651451.04 Mean alcohol consumption during free choice period for males [gms ethanol/kg body weight/day] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 05 8 wks 56 Male 18-20 gms ethanol/kg body weight/day 14.8 0.54 3.8 0.59 5.2 0.82 12.9 0.75 4.4 1.27 9.5 2.52 13.3 1.50 4.5 1.16 7.0 0.69 7/11/2003 MK Sullivan MK Sullivan 8651451.05 Mean alcohol consumption during free choice period for females [gms ethanol/kg body weight/day] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 06 8 wks 56 Female 18-20 gms ethanol/kg body weight/day 20.5 1.44 3.7 0.48 12.2 1.76 17.5 1.68 9.1 2.00 7.2 2.18 17.1 1.84 9.2 1.94 4.7 0.60 7/11/2003 MK Sullivan MK Sullivan 8651451.06 Mean body weight [g] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 07 8 wks 56 MF 18-20 g 23.5 0.79 22.9 0.46 22.6 0.79 21.4 0.68 23.9 0.60 20.5 0.65 23.5 0.79 23.3 1.05 22.7 0.94 7/11/2003 MK Sullivan MK Sullivan 8651451.07 Alcohol preference ratio [mls 10 % ethanol/mls total fluid] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 08 8 wks 56 MF 18-20 mls 10 % ethanol/mls total fluid 0.82 0.02 0.15 0.01 0.35 0.04 0.76 0.03 0.38 0.05 0.37 0.07 23.5 0.79 0.37 0.07 0.18 0.02 7/11/2003 MK Sullivan MK Sullivan 8651451.08 Alcohol consumption ratio [gms ethanol/kg body weight] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 09 8 wks 56 MF 18-20 gms ethanol/kg body weight 17.4 0.85 3.7 0.36 8.0 1.23 15.1 0.96 8.7 1.15 8.5 1.73 15.2 1.24 7.4 1.45 5.1 0.63 7/11/2003 MK Sullivan MK Sullivan 8651451.09 Catalase activity in liver [µMol] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 10 8 wks 56 MF 15-18 µMol 68.4 3.9 115.9 5.9 71.1 4.6 76.2 4.3 0.0 0.0 130.9 5.2 106.8 7.3 121.6 7.3 136.0 6.0 7/11/2003 MK Sullivan MK Sullivan 8651451.1 Catalase activity in brain [nMol] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 11 8 wks 56 MF 15-18 nMol 517.0 31 750.1 68 785.8 25 627.3 31 0.0 0.0 660.0 34 636.7 43 615.1 33 795.8 37 7/11/2003 MK Sullivan MK Sullivan 8651451.11 ALDH activity in liver [nMol NADH produced/minute/milligram of protein] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 12 8 wks 56 MF 15-18 nMol NADH produced/minute/milligram of protein 23.6 1.7 21.6 1.5 14.1 1.0 15.3 0.9 15.0 1.2 12.4 1.3 15.7 1.1 21.3 3.3 13.6 1.1 7/11/2003 MK Sullivan MK Sullivan 8651451.12 ALDH activity in brain [nMol NADH produced/minute/milligram of protein] Studies were initiated to characterize behaviorally and biochemically C57BL/6J and DBA/2J inbred mice, as well as BXD Recombinant Inbred (RI) strains derived from them. The C57BL/6J, DBA/2J, and 7 BXD RI strains were tested for voluntary alcohol consumption (VAC) by receiving 4 days of forced exposure to a 10% (w/v) solution of alcohol, followed by 3 weeks of free choice between water and 10% alcohol. Measures of VAC included the absolute intake of alcohol (g/kg), as well as alcohol preference. A wide range of VAC was displayed by the various BXD RI strains with a continuous (rather than bimodal) distribution, indicating that there is likely to be additive effects of several genes involved in regulating alcohol-related behaviors. Kinetic characteristics of aldehyde dehydrogenase and catalase in liver and brain of the C57BL/6J, DBA/2J, and BXD strains of mice were determined to test the hypothesis that the genetic regulation of the levels of alcohol-metabolizing enzymes mediate differences in VAC. Aldehyde dehydrogenase activity was determined spectrophotometrically by observing the change in absorption at 340 nm. Catalase activity was determined by measuring oxygen production with a Yellow Springs Biological Oxygen monitor and oxygen electrode. There was a strong negative relationship between VAC and brain catalase activity in the BXD RI and parental strains. These data suggest that RI strains are likely to be useful genetic models in the examination of quantitative trait loci controlling VAC and other responses to alcohol. Gill K, Liu Y, Deitrich RA Voluntary alcohol consumption in BXD recombinant inbred mice: relationship to alcohol metabolism Alcohol Clin Exp Res 20(1) 185-190 Feb 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8651451&dopt=Abstract 8651451 13 8 wks 56 MF 15-18 nMol NADH produced/minute/milligram of protein 1.89 0.14 2.02 0.14 0.57 0.05 1.47 0.19 0.59 0.11 0.95 0.15 1.43 0.16 3.10 0.30 1.34 0.17 7/11/2003 MK Sullivan MK Sullivan 8651451.13 Proliferation of BrdU-labelled cells in subgranular zone, day 1 after last BrdU injection [number of cells] A number of reports have indicated that adult neurogenesis might be involved in hippocampal function. While increases in adult neurogenesis are paralleled by improvements on learning tasks and learning itself can promote the survival of newly generated neurons in the hippocampus, a causal link between learning processes and adult hippocampal neurogenesis is difficult to prove. Here, we addressed the related question of whether the baseline level of adult neurogenesis is predictive of performance on the water maze task as a test of hippocampal function. We used ten strains of recombinant inbred mice, based on C57BL/6, which are good learners and show high baseline levels of neurogenesis, and DBA/2, which are known to be poor learners and which exhibit low levels of adult neurogenesis. Two of these strains, BXD-2 and BXD-8, showed a 26-fold difference in the number of newly generated neurons per hippocampus. Over all strains, including the parental strains, there was a significant correlation between the number of new neurons generated in the dentate gyrus and parameters describing the acquisition of the water maze task (slope of the learning curves). Similar results were seen when the parental strains were not included in the analysis. There was no correlation between adult hippocampal neurogenesis and probe trial performance, performance on the rotarod, overall locomotor activity, and baseline serum corticosterone levels. This result supports the hypothesis that adult neurogenesis is involved in specific aspects of hippocampal function, particularly the acquisition of new information. Kempermann G, Gage FH Genetic determinants of adult hippocampal neurogenesis correlate with acquisition, but not probe trial performance, in the water maze task. Eur J Neurosci 16(1) 129-136 Jul 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12153537&dopt=Abstract 12153537 02 MF 3-10 number of cells 5416 413.8 2014 377.3 2961 270.2 5389 521.6 7001 0.0 4047 243.9 2968 278.0 6131 1067.1 3515 227.5 2254 324.7 4227 1152.2 6/14/2003 MK Sullivan 12153537.02 Survival of BrdU-labelled cells in subgranular zone, 4 weeks after last BrdU injection [number of cells] A number of reports have indicated that adult neurogenesis might be involved in hippocampal function. While increases in adult neurogenesis are paralleled by improvements on learning tasks and learning itself can promote the survival of newly generated neurons in the hippocampus, a causal link between learning processes and adult hippocampal neurogenesis is difficult to prove. Here, we addressed the related question of whether the baseline level of adult neurogenesis is predictive of performance on the water maze task as a test of hippocampal function. We used ten strains of recombinant inbred mice, based on C57BL/6, which are good learners and show high baseline levels of neurogenesis, and DBA/2, which are known to be poor learners and which exhibit low levels of adult neurogenesis. Two of these strains, BXD-2 and BXD-8, showed a 26-fold difference in the number of newly generated neurons per hippocampus. Over all strains, including the parental strains, there was a significant correlation between the number of new neurons generated in the dentate gyrus and parameters describing the acquisition of the water maze task (slope of the learning curves). Similar results were seen when the parental strains were not included in the analysis. There was no correlation between adult hippocampal neurogenesis and probe trial performance, performance on the rotarod, overall locomotor activity, and baseline serum corticosterone levels. This result supports the hypothesis that adult neurogenesis is involved in specific aspects of hippocampal function, particularly the acquisition of new information. Kempermann G, Gage FH Genetic determinants of adult hippocampal neurogenesis correlate with acquisition, but not probe trial performance, in the water maze task. Eur J Neurosci 16(1) 129-136 Jul 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12153537&dopt=Abstract 12153537 03 MF 1-10 number of cells 2184 241.6 864 35.3 403 31.4 1157 213.4 2709 474.1 3745 391.4 1052 19.6 1085 15.7 1072 110.6 1283 156.1 1215 363.9 679 80.1 883 47.8 6/14/2003 MK Sullivan 12153537.03 Number of neurons, 4 weeks after last BrdU injection [%] A number of reports have indicated that adult neurogenesis might be involved in hippocampal function. While increases in adult neurogenesis are paralleled by improvements on learning tasks and learning itself can promote the survival of newly generated neurons in the hippocampus, a causal link between learning processes and adult hippocampal neurogenesis is difficult to prove. Here, we addressed the related question of whether the baseline level of adult neurogenesis is predictive of performance on the water maze task as a test of hippocampal function. We used ten strains of recombinant inbred mice, based on C57BL/6, which are good learners and show high baseline levels of neurogenesis, and DBA/2, which are known to be poor learners and which exhibit low levels of adult neurogenesis. Two of these strains, BXD-2 and BXD-8, showed a 26-fold difference in the number of newly generated neurons per hippocampus. Over all strains, including the parental strains, there was a significant correlation between the number of new neurons generated in the dentate gyrus and parameters describing the acquisition of the water maze task (slope of the learning curves). Similar results were seen when the parental strains were not included in the analysis. There was no correlation between adult hippocampal neurogenesis and probe trial performance, performance on the rotarod, overall locomotor activity, and baseline serum corticosterone levels. This result supports the hypothesis that adult neurogenesis is involved in specific aspects of hippocampal function, particularly the acquisition of new information. Kempermann G, Gage FH Genetic determinants of adult hippocampal neurogenesis correlate with acquisition, but not probe trial performance, in the water maze task. Eur J Neurosci 16(1) 129-136 Jul 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12153537&dopt=Abstract 12153537 04 MF 1-10 % 78.3 51.8 27.9 63.7 67.6 78.6 44.4 57.7 68.7 79.2 68.8 50.5 56.9 6/14/2003 MK Sullivan 12153537.04 Number of astrocytes, 4 weeks after last BrdU injection [%] A number of reports have indicated that adult neurogenesis might be involved in hippocampal function. While increases in adult neurogenesis are paralleled by improvements on learning tasks and learning itself can promote the survival of newly generated neurons in the hippocampus, a causal link between learning processes and adult hippocampal neurogenesis is difficult to prove. Here, we addressed the related question of whether the baseline level of adult neurogenesis is predictive of performance on the water maze task as a test of hippocampal function. We used ten strains of recombinant inbred mice, based on C57BL/6, which are good learners and show high baseline levels of neurogenesis, and DBA/2, which are known to be poor learners and which exhibit low levels of adult neurogenesis. Two of these strains, BXD-2 and BXD-8, showed a 26-fold difference in the number of newly generated neurons per hippocampus. Over all strains, including the parental strains, there was a significant correlation between the number of new neurons generated in the dentate gyrus and parameters describing the acquisition of the water maze task (slope of the learning curves). Similar results were seen when the parental strains were not included in the analysis. There was no correlation between adult hippocampal neurogenesis and probe trial performance, performance on the rotarod, overall locomotor activity, and baseline serum corticosterone levels. This result supports the hypothesis that adult neurogenesis is involved in specific aspects of hippocampal function, particularly the acquisition of new information. Kempermann G, Gage FH Genetic determinants of adult hippocampal neurogenesis correlate with acquisition, but not probe trial performance, in the water maze task. Eur J Neurosci 16(1) 129-136 Jul 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12153537&dopt=Abstract 12153537 05 MF 1-10 % 85.3 80.4 64.9 81.8 81.1 87.7 69.3 80.0 91.8 93.8 85.6 77.1 89.5 6/14/2003 MK Sullivan 12153537.05 New neurons, 4 weeks after last BrdU, number of BrdU cells X ratio of NeuN / BrdU labelled cells A number of reports have indicated that adult neurogenesis might be involved in hippocampal function. While increases in adult neurogenesis are paralleled by improvements on learning tasks and learning itself can promote the survival of newly generated neurons in the hippocampus, a causal link between learning processes and adult hippocampal neurogenesis is difficult to prove. Here, we addressed the related question of whether the baseline level of adult neurogenesis is predictive of performance on the water maze task as a test of hippocampal function. We used ten strains of recombinant inbred mice, based on C57BL/6, which are good learners and show high baseline levels of neurogenesis, and DBA/2, which are known to be poor learners and which exhibit low levels of adult neurogenesis. Two of these strains, BXD-2 and BXD-8, showed a 26-fold difference in the number of newly generated neurons per hippocampus. Over all strains, including the parental strains, there was a significant correlation between the number of new neurons generated in the dentate gyrus and parameters describing the acquisition of the water maze task (slope of the learning curves). Similar results were seen when the parental strains were not included in the analysis. There was no correlation between adult hippocampal neurogenesis and probe trial performance, performance on the rotarod, overall locomotor activity, and baseline serum corticosterone levels. This result supports the hypothesis that adult neurogenesis is involved in specific aspects of hippocampal function, particularly the acquisition of new information. Kempermann G, Gage FH Genetic determinants of adult hippocampal neurogenesis correlate with acquisition, but not probe trial performance, in the water maze task. Eur J Neurosci 16(1) 129-136 Jul 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12153537&dopt=Abstract 12153537 06 MF 1-10 number of BrdU cells X ratio of NeuN/BrdU labelled cells 1695 232.6 433 61.7 110 17.2 732 142.8 1816 393.3 2891 201.4 462 0.0 621 45.2 731 115.9 1007 153.8 872 355.6 365 81.4 493 27.2 6/14/2003 MK Sullivan 12153537.06 Ethanol induced ataxia - initial sensitivity Blood ethanol concentrations (BECo) at loss of balance on dowel test [mg %] In previous work, we identified genetic correlations between cAMP accumulation in the cerebellum and sensitivity to the incoordinating effects of ethanol. A genetic correlation suggests that common genes underlie the phenotypes investigated. One method for provisionally identifying genes involved in a given phenotypic measure is quantitative trait locus (QTL) analysis. Using a panel of 30 BXD recombinant inbred strains of mice and the progenitors (DBA/2J and C57BL/6J), and the dowel test for ataxia, we measured the blood ethanol concentrations at the time an animal first fell from the dowel and acute functional tolerance (AFT), and investigated cAMP signaling in the cerebellum. Cyclic AMP accumulation was measured in whole-cell preparations of cerebellar minces from individual mice under basal or stimulated conditions. We conducted a genome-wide QTL analysis of the behavioral and biochemical measures with >2000 genetic markers to identify significant associations. Western blot and comparative sequencing analysis were used to compare cAMP response element binding protein (CREB) levels and protein-coding sequence, respectively. QTL analyses correlating strain means with allelic status at genetic markers identified several significant associations (p < 0.01). Analysis of variance revealed an effect of strain on behavioral and biochemical measures. There was a significant genetic correlation between initial sensitivity and basal cAMP accumulation in the cerebellum. We identified 6 provisional QTLs for initial sensitivity on four chromosomes, 6 provisional QTLs for AFT on four chromosomes, and 11 provisional QTLs for cAMP signaling on nine chromosomes. Two loci were found to overlap for measures of initial sensitivity and for cAMP signaling. Given the genetic correlation between initial sensitivity and basal cAMP accumulation, we investigated candidate genes in a QTL on chromosome 1. Comparative sequence analysis was performed, and protein levels were compared between C57 and DBA mice for Creb1. No significant differences were detected in coding sequence or protein levels for CREB. These results suggest that although ethanol sensitivity and cAMP signaling are determined by multiple genes, they may share certain genetic codetermination. Kirstein SL, Davidson KL, Ehringer MA, Sikela JM, Erwin VG, Tabakoff B. Quantitative trait loci affecting initial sensitivity and acute functional tolerance to ethanol-induced ataxia and brain cAMP signaling in BXD recombinant inbred mice J Pharmacol Exp Ther 302(3) 1238-1245 Sep 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12183685&dopt=Abstract 12183685 09 55-80 days 55 80 Male 6-18 mg% 195.33 3.1 205.91 6.0 197.28 10.6 128.9 20.6 201.40 7.3 152.49 21.5 169.13 11.1 190.51 10.8 207.85 4.2 209.95 3.0 202.57 6.0 221.38 9.3 153.89 27.8 152.64 12.2 192.77 20.7 201.79 6.6 176.98 10.0 169.36 6.6 231.42 20.9 231.88 10.5 169.98 10.7 168.04 7.4 186.86 11.5 195.65 5.0 190.36 10.7 160.71 20.1 160.26 10.4 185.8 8.9 215.79 10.6 213.37 6.5 194.48 14.35 188.26 4.2 6/11/2003 MK Sullivan 12183685.09 New astrocytes, 4 weeks after last BrdU, number of BrdU cells X ratio of S100 beta / BrdU labelled cells A number of reports have indicated that adult neurogenesis might be involved in hippocampal function. While increases in adult neurogenesis are paralleled by improvements on learning tasks and learning itself can promote the survival of newly generated neurons in the hippocampus, a causal link between learning processes and adult hippocampal neurogenesis is difficult to prove. Here, we addressed the related question of whether the baseline level of adult neurogenesis is predictive of performance on the water maze task as a test of hippocampal function. We used ten strains of recombinant inbred mice, based on C57BL/6, which are good learners and show high baseline levels of neurogenesis, and DBA/2, which are known to be poor learners and which exhibit low levels of adult neurogenesis. Two of these strains, BXD-2 and BXD-8, showed a 26-fold difference in the number of newly generated neurons per hippocampus. Over all strains, including the parental strains, there was a significant correlation between the number of new neurons generated in the dentate gyrus and parameters describing the acquisition of the water maze task (slope of the learning curves). Similar results were seen when the parental strains were not included in the analysis. There was no correlation between adult hippocampal neurogenesis and probe trial performance, performance on the rotarod, overall locomotor activity, and baseline serum corticosterone levels. This result supports the hypothesis that adult neurogenesis is involved in specific aspects of hippocampal function, particularly the acquisition of new information. Kempermann G, Gage FH Genetic determinants of adult hippocampal neurogenesis correlate with acquisition, but not probe trial performance, in the water maze task. Eur J Neurosci 16(1) 129-136 Jul 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12153537&dopt=Abstract 12153537 07 MF 1-101-10 number of BrdU cells X ratio of S100beta/BrdU labelled cells 136 32.2 245 30.9 142 15.9 243 168.1 404 170.2 326 177.2 255 0.0 235 48.1 245 26.2 179 52.1 165 50.3 183 22.6 290 60.3 6/14/2003 MK Sullivan 12153537.07 Probe trial water maze time spent in target quadrant, day 5, % A number of reports have indicated that adult neurogenesis might be involved in hippocampal function. While increases in adult neurogenesis are paralleled by improvements on learning tasks and learning itself can promote the survival of newly generated neurons in the hippocampus, a causal link between learning processes and adult hippocampal neurogenesis is difficult to prove. Here, we addressed the related question of whether the baseline level of adult neurogenesis is predictive of performance on the water maze task as a test of hippocampal function. We used ten strains of recombinant inbred mice, based on C57BL/6, which are good learners and show high baseline levels of neurogenesis, and DBA/2, which are known to be poor learners and which exhibit low levels of adult neurogenesis. Two of these strains, BXD-2 and BXD-8, showed a 26-fold difference in the number of newly generated neurons per hippocampus. Over all strains, including the parental strains, there was a significant correlation between the number of new neurons generated in the dentate gyrus and parameters describing the acquisition of the water maze task (slope of the learning curves). Similar results were seen when the parental strains were not included in the analysis. There was no correlation between adult hippocampal neurogenesis and probe trial performance, performance on the rotarod, overall locomotor activity, and baseline serum corticosterone levels. This result supports the hypothesis that adult neurogenesis is involved in specific aspects of hippocampal function, particularly the acquisition of new information. Kempermann G, Gage FH Genetic determinants of adult hippocampal neurogenesis correlate with acquisition, but not probe trial performance, in the water maze task. Eur J Neurosci 16(1) 129-136 Jul 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12153537&dopt=Abstract 12153537 08 MF 1-10 % 31.7 4.58 23.1 1.69 34.2 2.76 37.7 8.25 28.6 6.85 34.4 0.00 28.1 8.79 31.4 3.71 35.1 5.30 30.5 4.20 24.9 4.30 32.2 6.35 6/14/2003 MK Sullivan 12153537.08 Probe trial water maze time spent in swim path, day 5, % A number of reports have indicated that adult neurogenesis might be involved in hippocampal function. While increases in adult neurogenesis are paralleled by improvements on learning tasks and learning itself can promote the survival of newly generated neurons in the hippocampus, a causal link between learning processes and adult hippocampal neurogenesis is difficult to prove. Here, we addressed the related question of whether the baseline level of adult neurogenesis is predictive of performance on the water maze task as a test of hippocampal function. We used ten strains of recombinant inbred mice, based on C57BL/6, which are good learners and show high baseline levels of neurogenesis, and DBA/2, which are known to be poor learners and which exhibit low levels of adult neurogenesis. Two of these strains, BXD-2 and BXD-8, showed a 26-fold difference in the number of newly generated neurons per hippocampus. Over all strains, including the parental strains, there was a significant correlation between the number of new neurons generated in the dentate gyrus and parameters describing the acquisition of the water maze task (slope of the learning curves). Similar results were seen when the parental strains were not included in the analysis. There was no correlation between adult hippocampal neurogenesis and probe trial performance, performance on the rotarod, overall locomotor activity, and baseline serum corticosterone levels. This result supports the hypothesis that adult neurogenesis is involved in specific aspects of hippocampal function, particularly the acquisition of new information. Kempermann G, Gage FH Genetic determinants of adult hippocampal neurogenesis correlate with acquisition, but not probe trial performance, in the water maze task. Eur J Neurosci 16(1) 129-136 Jul 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12153537&dopt=Abstract 12153537 09 MF 1-10 % 33.6 5.87 20.7 1.37 33.9 28.6 38.5 7.56 30.6 31.9 35.7 0.00 28.4 4.21 37.9 11.32 33.6 5.63 28.0 3.38 24.8 4.58 31.7 7.52 6/14/2003 MK Sullivan 12153537.09 Latency water maze, day 6, seconds A number of reports have indicated that adult neurogenesis might be involved in hippocampal function. While increases in adult neurogenesis are paralleled by improvements on learning tasks and learning itself can promote the survival of newly generated neurons in the hippocampus, a causal link between learning processes and adult hippocampal neurogenesis is difficult to prove. Here, we addressed the related question of whether the baseline level of adult neurogenesis is predictive of performance on the water maze task as a test of hippocampal function. We used ten strains of recombinant inbred mice, based on C57BL/6, which are good learners and show high baseline levels of neurogenesis, and DBA/2, which are known to be poor learners and which exhibit low levels of adult neurogenesis. Two of these strains, BXD-2 and BXD-8, showed a 26-fold difference in the number of newly generated neurons per hippocampus. Over all strains, including the parental strains, there was a significant correlation between the number of new neurons generated in the dentate gyrus and parameters describing the acquisition of the water maze task (slope of the learning curves). Similar results were seen when the parental strains were not included in the analysis. There was no correlation between adult hippocampal neurogenesis and probe trial performance, performance on the rotarod, overall locomotor activity, and baseline serum corticosterone levels. This result supports the hypothesis that adult neurogenesis is involved in specific aspects of hippocampal function, particularly the acquisition of new information. Kempermann G, Gage FH Genetic determinants of adult hippocampal neurogenesis correlate with acquisition, but not probe trial performance, in the water maze task. Eur J Neurosci 16(1) 129-136 Jul 2002 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12153537&dopt=Abstract 12153537 10 MF 1-10 seconds 3.29 0.554 6.98 1.407 2.52 0.164 5.85 0.818 2.55 0.593 6.70 1.573 7.50 1.375 6.04 0.807 1.87 0.277 3.87 0.927 14.50 2.073 6.19 1.495 6/14/2003 MK Sullivan 12153537.1 Mean raffinose undecaacetate (RUA) (0.4mM) consumed [%] Thirty strains of mice were tested for their ability to taste a 0.4 mM solution of raffinose undecaacetate (RUA). There were large strain differences. Some strains showed little or no ability to taste the RUA. Two strains, SWR and Schneider, could taste RUA because they posses the Soaa allele which enables them to taste a variety of aceylated monosaccharides. Three other strains, BALB/c, DBA/2 and C3H, could taste RUA because they posses the RUAa allele which enables them to taste some larger structure which is a feature of the molecule as a whole. The gene Rua is tightly linked to the gene for quinine tasting. Qui, but the distribution of their alleles among the strains shows that they are different genes. It is suggested that there is in the mouse a cluster of tightly-linked genes, each one determining a taste receptor for a different bitter substance or chemical group. The relevance of these findings to the physiology of tasting is discussed. Lush IE The genetics of tasting in mice. IV. The acetates of raffinose, galactose, and beta-lactose Genet Res 47(2) 117-123 Apr 1986 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3754827&dopt=Abstract 3754827 01 MF 2-48 % 42 4.5 40 4.2 7 2.2 44 11.4 43 3.8 43 2.0 5 0.3 49 3.8 48 2.6 49 2.9 16 6.3 44 5.5 37 2.9 6 0.7 7/14/2003 MK Sullivan 3754827.01 Mean beta-lactose acetate (0.3 mM) consumed [%] Thirty strains of mice were tested for their ability to taste a 0.4 mm solution of raffinose undecaacetate (RUA). There were large strain differences. Some strains showed little or no ability to taste the RUA. Two strains, SWR and Schneider, could taste RUA because they posses the Soaa allele which enables them to taste a variety of aceylated monosaccharides. Three other strains, BALB/c, DBA/2 and C3H, could taste RUA because they posses the RUAa allele which enables them to taste some larger structure which is a feature of the molecule as a whole. The gene Rua is tightly linked to the gene for quinine tasting. Qui, but the distribution of their alleles among the strains shows that they are different genes. It is suggested that there is in the mouse a cluster of tightly-linked genes, each one determining a taste receptor for a different bitter substance or chemical group. The relevance of these findings to the physiology of tasting is discussed. Lush IE The genetics of tasting in mice. IV. The acetates of raffinose, galactose, and beta-lactose Genet Res 47(2) 117-123 Apr 1986 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3754827&dopt=Abstract 3754827 02 MF 1-14 % 6 2.4 18 8.5 30 6.4 7 1.6 11 5.5 3 0.8 34 10.2 16 8.2 19 5.1 17 4.7 36 4.3 6 1.0 15 4.0 34 4.6 7/14/2003 MK Sullivan 3754827.02 Mean saccharin (3.2 mM) consumed [%] Twenty-six strains of mice were tested for their reaction to four different sweet substances; saccharin, acesulfame, dulcin and sucrose. There was considerable strain variation in the degree to which they found the sweet substances preferable to water. The variation in preference for any one sweet substance is very highly correlated with the variation in preference for the other sweet substances. This is interpreted to mean that there is only one sweetness receptor, although an alternative explanation in terms of variation in psychological motivation is not discounted. The difference between C57BL/6Ty and DBA/2Ty is largely due to a single gene, Sac. Lush IE The genetics of tasting in mice. VI. Saccharin, acesulfame, dulcin and sucrose Genet Res 53(2) 95-99 Apr 1989 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2744455&dopt=Abstract 2744455 01 MF % 62 3.4 66 8.1 95 2.2 88 1.5 57 2.0 92 1.1 65 2.6 80 4.3 68 2.2 64 3.5 86 4.0 64 3.0 84 6.1 81 5.6 62 4.6 55 4.9 93 1.5 55 84 2.3 55 2.3 7/14/2003 MK Sullivan 2744455.01 Mean acesulfame (3.2 mM) consumed [%] Twenty-six strains of mice were tested for their reaction to four different sweet substances; saccharin, acesulfame, dulcin and sucrose. There was considerable strain variation in the degree to which they found the sweet substances preferable to water. The variation in preference for any one sweet substance is very highly correlated with the variation in preference for the other sweet substances. This is interpreted to mean that there is only one sweetness receptor, although an alternative explanation in terms of variation in psychological motivation is not discounted. The difference between C57BL/6Ty and DBA/2Ty is largely due to a single gene, Sac. Lush IE The genetics of tasting in mice. VI. Saccharin, acesulfame, dulcin and sucrose Genet Res 53(2) 95-99 Apr 1989 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=2744455&dopt=Abstract 2744455 02 MF % 53 1.7 57 4.1 93 2.7 82 2.2 58 2.0 89 3.8 57 4.9 81 2.6 57 1.7 60 1.3 77 2.8 56 2.6 79 1.0 77 2.7 54 3.8 51 3.2 85 1.9 53 88 2.0 52 2.6 7/14/2003 MK Sullivan 2744455.02 Mean glycine (10 mM) consumed [%] Glycine tastes both bitter and sweet to mice but there are differences between strains in their ability to detect each taste. With respect to the bitter taste, fifteen strains were classified as tasters and twelve strains as non-tasters. The difference is due to a single gene, Glb (glycine bitterness). Cyclohexamide tastes bitter to all mice at a concentration of 8 µM, but strain differences in sensitivity to the taste of cycloheximide can be detected at lower concentrations. The BXD RI strains can be classified into two groups with respect to sensitivity to cycloheximide. This is probably due to the segregation of two alleles of a single gene, Cyx. A comparison of the distribution in RI strins of alleles of four bitterness-tasting genes shows that the loci are all closely linked and are probably in the order Cyx-Qui-Rua-Glb. Lush IE, Holland G The genetics of tasting in mice. V. Glycine and cycloheximide Genet Res 52(3) 207-212 Dec 1988 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3243425&dopt=Abstract 3243425 01 MF 3-28 % 6 0.7 32 6.0 8 4.4 34 5.0 13 2.1 7 2.3 31 3.0 4 1.4 33 4.0 45 5.6 7 2.1 42 2.4 4 1.6 9 3.0 35 7.4 36 2.6 4 0.3 35 5.6 39 5.8 6 2.2 7/14/2003 MK Sullivan 3243425.01 B-mannosidase activity in kidney of Female [mg p-nitrophenl liberated/g tissue wet weight/hr at 37 degrees C] A gene (Bmn) with a major effect on beta-mannosidase activity in kidney and liver of the house mouse was revealed by assay with the synthetic substrate p-nitrophenyl-beta-D-mannoside. Activity is low in DBA/2J and CSB mice and high in C57BL/6J mice. By the use of the BXD series of recombinant inbred strains and by crosses between C57BL and CSB, it was possible to map the gene to the distal part of chromosome 3 by demonstration of linkage to a gene for cadmium resistance, cdm, as well as to the Adh-3 locus. Lundin LG A gene (Bmn) controlling B-mannosidase activity in the mouse is located in the distal part of chromosome 3 Biochem Genet 25(7-8) 603-610 Aug 1987 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3447593&dopt=Abstract 3447593 02 Female mg p-nitrophenl liberated/g tissue wet weight/hr at 37 degrees C 2.710 1.505 3.341 2.011 3.473 3.290 0.030 3.558 1.680 2.027 2.643 3.093 1.420 2.097 0.299 2.062 3.789 2.808 1.679 4.234 2.001 3.614 3.252 1.479 7/14/2003 MK Sullivan MK Sullivan 3447593.02 Growth of Salmonella typhimurium bacteria strain LT2-Z from livers and spleens 6 days post inoculation with 102 CFU [log10 number of CFU] The studies described in this paper provide evidence that the pathogenesis of Salmonella typhimurium in mice is dependent on interactions between particular genotypes of the infected mice and the infecting Salmonella strain. This conclusion was based on data obtained by infecting a panel of BXD recombinant inbred mice with each of three S. typhimurium strains. One of the S. typhimurium strains was a transconjugant (WB500) produced in an interrupted mating between the two other strains, one (SR-11) of high and the other (LT2-Z) of low virulence for BALB/c mice. We found that strain WB500 appeared to have inherited from SR-11 a gene (or genes) which was required to exploit the Itys/s genotype in mice. However, WB500 apparently lacked other SR-11 virulence gene(s), whose effect on the in vivo growth of SR-11 was independent of the Ity genotype of the mouse. Benjamin WH Jr, Turnbough CL Jr, Posey BS, Briles DE Salmonella typhmurium virulence genes necessary to exploit the Itys/s genotype of the mouse Infect Immun 51(3) 872-878 Mar 1986 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3512437&dopt=Abstract 3512437 01 8-12 wks 56 84 MF 4 or more log10 number of CFU 4.92 0.218 5.55 0.235 4.14 0.166 5.29 0.274 6.79 0.560 4.12 0.071 4.69 0.154 4.95 0.149 4.89 0.174 4.57 0.174 5.42 0.262 5.17 0.287 3.04 0.154 5.61 0.118 3.78 0.215 5.52 0.332 4.82 0.104 3.06 0.235 4.69 0.107 3.78 0.283 7/15/2003 MK Sullivan MK Sullivan 3512437.01 Growth of Salmonella typhimurium bacteria strain WB500 from livers and spleens 6 days post inoculation with 102 CFU [log10 number of CFU] The studies described in this paper provide evidence that the pathogenesis of Salmonella typhimurium in mice is dependent on interactions between particular genotypes of the infected mice and the infecting Salmonella strain. This conclusion was based on data obtained by infecting a panel of BXD recombinant inbred mice with each of three S. typhimurium strains. One of the S. typhimurium strains was a transconjugant (WB500) produced in an interrupted mating between the two other strains, one (SR-11) of high and the other (LT2-Z) of low virulence for BALB/c mice. We found that strain WB500 appeared to have inherited from SR-11 a gene (or genes) which was required to exploit the Itys/s genotype in mice. However, WB500 apparently lacked other SR-11 virulence gene(s), whose effect on the in vivo growth of SR-11 was independent of the Ity genotype of the mouse. Benjamin WH Jr, Turnbough CL Jr, Posey BS, Briles DE Salmonella typhmurium virulence genes necessary to exploit the Itys/s genotype of the mouse Infect Immun 51(3) 872-878 Mar 1986 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3512437&dopt=Abstract 3512437 02 8-12 wks 56 84 MF 4 or more log10 number of CFU 6.67 0.230 5.04 0.305 4.29 0.559 7.74 0.222 7.64 0.305 3.96 0.182 4.69 0.096 6.75 0.363 7.84 0.164 6.61 0.433 5.27 0.181 8.16 0.000 3.69 0.000 7.78 0.198 4.08 0.205 6.46 0.778 4.86 0.083 3.86 0.098 5.16 0.076 3.91 0.069 7/15/2003 MK Sullivan MK Sullivan 3512437.02 Growth of Salmonella typhimurium bacteria strain SR-11 from livers and spleens 6 days post inoculation with 102 CFU [log10 number of CFU] The studies described in this paper provide evidence that the pathogenesis of Salmonella typhimurium in mice is dependent on interactions between particular genotypes of the infected mice and the infecting Salmonella strain. This conclusion was based on data obtained by infecting a panel of BXD recombinant inbred mice with each of three S. typhimurium strains. One of the S. typhimurium strains was a transconjugant (WB500) produced in an interrupted mating between the two other strains, one (SR-11) of high and the other (LT2-Z) of low virulence for BALB/c mice. We found that strain WB500 appeared to have inherited from SR-11 a gene (or genes) which was required to exploit the Itys/s genotype in mice. However, WB500 apparently lacked other SR-11 virulence gene(s), whose effect on the in vivo growth of SR-11 was independent of the Ity genotype of the mouse. Benjamin WH Jr, Turnbough CL Jr, Posey BS, Briles DE Salmonella typhmurium virulence genes necessary to exploit the Itys/s genotype of the mouse Infect Immun 51(3) 872-878 Mar 1986 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=3512437&dopt=Abstract 3512437 03 8-12 wks 56 84 MF 5 or more log10 number of CFU 8.01 0.091 6.23 0.104 5.28 0.062 7.35 0.077 7.81 0.115 5.58 0.068 4.86 0.196 7.92 0.184 7.46 0.083 7.54 0.215 5.38 0.084 7.27 0.277 8.04 5.27 0.073 8.05 0.071 6.31 0.083 5.62 0.195 5.57 0.082 5.42 0.099 7/15/2003 MK Sullivan MK Sullivan 3512437.03 Virus titer in spleen 4 days after infection with 5X104 PFU of MCMV [log10 mean titer] The resistance of mice to lethal infection by murine CMV (MCMV) is under complex host genetic control with contributions from both H-2 and non-H-2 genes. We have previously shown that an autosomal, non-MHC encoded gene, Cmv-1, controls MCMV replication in the spleen. We have investigated the mechanism by which the Cmv-1 resistance gene confers protection against MCMV infection. Using H-2 compatible irradiation bone marrow chimeras, the enhanced resistance to MCMV infection that is associated with the Cmv-1l allele in the C57BL background was shown to be mediated by an irradiation-sensitive bone marrow-derived cell population, or a factor produced by these cells. The lack of correlation between serum IFN titers and the strain distribution pattern of Cmv-1 in CXB recombinant inbred mouse strains suggests that IFN does not mediate resistance conferred by this gene. Similarly, the lack of effect of in vivo depletion of mature CD4+ and CD8+ T cells on virus replication in C57BL/6J mice indicates that T cells are unlikely to be involved. In contrast, in vivo depletion of NK cells by injection of the anti-NK1.1 mAb PK136 abrogated restricted splenic virus replication in C57BL/6J----BALB.B chimeric mice and in the Cmv-1l CXB strains. These data indicate that the effect of the Cmv-1 gene is mediated by NK cells. The significant augmentation in NK cell activity after MCMV infection of the susceptible Cmv-1h strains (BALB/cBy), CXBG/By, CXBH/By, CXBI/By, and CXBK/By) indicates the existence in these mice of NK cells that are functionally and phenotypically distinct from those in Cmv-1l strains. NK cells present in the Cmv-1h strains are unable to restrict efficiently splenic MCMV replication in vivo, possibly due to a lack of specificity for virus-infected target cells. Finally, flow cytometric analysis of NK1-1 expression in CXB and BXD RI mice together with MCMV replication studies in the BXD RI strains indicate that Cmv-1 is closely linked to NK1.1 and other loci that reside on a distal segment of murine chromosome 6 in a region that has recently been defined as the natural killer complex. Scalzo AA, Fitzgerald NA, Wallace CR, Gibbons AE, Smart YC, Burton RC, Shellam GR The effect of the Cmv-1 resistance gene, which is linked to the natural killer cell gene complex, is mediated by natural killer cells. J Immunol 149(2) 581-589 July 1992 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1378069&dopt=Abstract 1378069 01 8-12 wks 56 84 Females 4 Log10 mean titer 2.10 0.081 4.60 0.071 4.25 0.034 4.64 0.040 1.30 0.040 5.20 0.050 4.72 0.083 4.91 0.057 1.66 0.122 5.42 0.110 5.20 0.086 1.30 0.042 1.31 0.047 5.48 0.052 1.31 0.040 1.66 0.149 1.30 0.043 1.29 0.035 4.65 0.043 2.23 0.154 1.30 0.044 5.26 0.073 1.49 0.066 1.74 0.127 4.62 0.149 7/15/2003 Mk Sullivan MK Sullivan 1378069.01 Antigenic activity of irradiated BXD spleen cells for Thy-1+CD3+CD4+CD8- T-cell clone (11.1B/c) [Thymidine uptake cpm] The relative contribution of individual non-H-2 Ag and of T cell subsets that initiate graft-vs-host reaction (GVHR) as well as the mechanism responsible for histopathologic lesions are still a matter of debate. To address these questions and to favor the selection of T cells primed in vivo against non-H-2 Ag important in GVHR we derived T cell clones from spleens of (DBA/2 x B10.D2)F1 (H-2d) mice developing this reaction after the graft of B10.D2 (H-2d) cells incompatible for numerous non-H-2 Ag plus Mlsa. The pattern of reactivity of eight selected clones against cells from different strains of mice including (BXD)RI strains indicated that one CD4+ clone is specific for Mlsa and seven additional clones (six CD4+ and one CD8+) are specific for four different non-H-2 Ag (Ag.I-IV) and proliferate in an H-2-restricted manner. The same series of experiments suggested that Ag.I and II are poorly polymorphic and allowed to propose the localisation of the genes controlling Ag.I (chromosome 1) and Ag.III (chromosome 4). All the clones show a triple (alpha, beta, gamma) mRNA transcript for TCR but at their surface they express the alpha/beta-heterodimer. The clone specific for Mlsa expresses V beta 6 and that specific for Ag.IV expresses V beta 8.1. Rapid mortality accompanied by clinical and histologic signs of severe GVHR was observed after administration of CD4+ clones (together with host-syngeneic bone marrow) derived early after grafting and specific for Ag.I and II but not after administration of: 1) CD8+ cytolytic clone derived early after grafting and specific for Ag.IV; 2) CD4+ clones derived late after grafting and specific for Ag.III; and 3) CD4+ clone specific for Mlsa. A clear correlation was established between the capacity of CD4+ clones to induce GVHR mortality, to mediate host-specific DTH and to release a high level of TNF. In conclusion: 1) the reaction against a single non-H-2 Ag is sufficient to provoke lethal GVHR; 2) the capacity to provoke GVHR mortality depends on antigenic specificity and functional properties of the responding clones; 3) the inflammatory process mediated by CD4+ clones may play a major role whereas the specific CD8+ T cell-mediated cytolytic activity is not necessarily lethal. Miconnet I, Huchet R, Bonardelle D, Motta R, Canon C, Garay-Rojas E, Kress M, Reynes M, Halle-Pannenko O, Bruley-Rosset M. Graft-versus-host mortality induced by noncytolytic CD4+ T cell clones specific for non-H-2 antigens J Immunol 145(7) 2123-2131 Oct 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1697877&dopt=Abstract 1697877 01 MF cpm 412 17161 795 38026 281 337 292 765 22049 29821 29808 15452 1697877.01 Antigenic activity of irradiated BXD spleen cells for Thy-1+CD3+CD4+CD8- T-cell clone D9 [Thymidine uptake cpm] The relative contribution of individual non-H-2 Ag and of T cell subsets that initiate graft-vs-host reaction (GVHR) as well as the mechanism responsible for histopathologic lesions are still a matter of debate. To address these questions and to favor the selection of T cells primed in vivo against non-H-2 Ag important in GVHR we derived T cell clones from spleens of (DBA/2 x B10.D2)F1 (H-2d) mice developing this reaction after the graft of B10.D2 (H-2d) cells incompatible for numerous non-H-2 Ag plus Mlsa. The pattern of reactivity of eight selected clones against cells from different strains of mice including (BXD)RI strains indicated that one CD4+ clone is specific for Mlsa and seven additional clones (six CD4+ and one CD8+) are specific for four different non-H-2 Ag (Ag.I-IV) and proliferate in an H-2-restricted manner. The same series of experiments suggested that Ag.I and II are poorly polymorphic and allowed to propose the localisation of the genes controlling Ag.I (chromosome 1) and Ag.III (chromosome 4). All the clones show a triple (alpha, beta, gamma) mRNA transcript for TCR but at their surface they express the alpha/beta-heterodimer. The clone specific for Mlsa expresses V beta 6 and that specific for Ag.IV expresses V beta 8.1. Rapid mortality accompanied by clinical and histologic signs of severe GVHR was observed after administration of CD4+ clones (together with host-syngeneic bone marrow) derived early after grafting and specific for Ag.I and II but not after administration of: 1) CD8+ cytolytic clone derived early after grafting and specific for Ag.IV; 2) CD4+ clones derived late after grafting and specific for Ag.III; and 3) CD4+ clone specific for Mlsa. A clear correlation was established between the capacity of CD4+ clones to induce GVHR mortality, to mediate host-specific DTH and to release a high level of TNF. In conclusion: 1) the reaction against a single non-H-2 Ag is sufficient to provoke lethal GVHR; 2) the capacity to provoke GVHR mortality depends on antigenic specificity and functional properties of the responding clones; 3) the inflammatory process mediated by CD4+ clones may play a major role whereas the specific CD8+ T cell-mediated cytolytic activity is not necessarily lethal. Miconnet I, Huchet R, Bonardelle D, Motta R, Canon C, Garay-Rojas E, Kress M, Reynes M, Halle-Pannenko O, Bruley-Rosset M. Graft-versus-host mortality induced by noncytolytic CD4+ T cell clones specific for non-H-2 antigens J Immunol 145(7) 2123-2131 Oct 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1697877&dopt=Abstract 1697877 02 MF cpm 260 11245 205 4758 194 220 156 432 11748 4883 15283 8478 1697877.02 Antigenic activity of irradiated BXD spleen cells for Thy-1+CD3+CD4+CD8- T-cell clone E4.3 [Thymidine uptake cpm] The relative contribution of individual non-H-2 Ag and of T cell subsets that initiate graft-vs-host reaction (GVHR) as well as the mechanism responsible for histopathologic lesions are still a matter of debate. To address these questions and to favor the selection of T cells primed in vivo against non-H-2 Ag important in GVHR we derived T cell clones from spleens of (DBA/2 x B10.D2)F1 (H-2d) mice developing this reaction after the graft of B10.D2 (H-2d) cells incompatible for numerous non-H-2 Ag plus Mlsa. The pattern of reactivity of eight selected clones against cells from different strains of mice including (BXD)RI strains indicated that one CD4+ clone is specific for Mlsa and seven additional clones (six CD4+ and one CD8+) are specific for four different non-H-2 Ag (Ag.I-IV) and proliferate in an H-2-restricted manner. The same series of experiments suggested that Ag.I and II are poorly polymorphic and allowed to propose the localisation of the genes controlling Ag.I (chromosome 1) and Ag.III (chromosome 4). All the clones show a triple (alpha, beta, gamma) mRNA transcript for TCR but at their surface they express the alpha/beta-heterodimer. The clone specific for Mlsa expresses V beta 6 and that specific for Ag.IV expresses V beta 8.1. Rapid mortality accompanied by clinical and histologic signs of severe GVHR was observed after administration of CD4+ clones (together with host-syngeneic bone marrow) derived early after grafting and specific for Ag.I and II but not after administration of: 1) CD8+ cytolytic clone derived early after grafting and specific for Ag.IV; 2) CD4+ clones derived late after grafting and specific for Ag.III; and 3) CD4+ clone specific for Mlsa. A clear correlation was established between the capacity of CD4+ clones to induce GVHR mortality, to mediate host-specific DTH and to release a high level of TNF. In conclusion: 1) the reaction against a single non-H-2 Ag is sufficient to provoke lethal GVHR; 2) the capacity to provoke GVHR mortality depends on antigenic specificity and functional properties of the responding clones; 3) the inflammatory process mediated by CD4+ clones may play a major role whereas the specific CD8+ T cell-mediated cytolytic activity is not necessarily lethal. Miconnet I, Huchet R, Bonardelle D, Motta R, Canon C, Garay-Rojas E, Kress M, Reynes M, Halle-Pannenko O, Bruley-Rosset M. Graft-versus-host mortality induced by noncytolytic CD4+ T cell clones specific for non-H-2 antigens J Immunol 145(7) 2123-2131 Oct 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1697877&dopt=Abstract 1697877 03 MF cpm 318 7345 336 12950 328 251 139 299 6293 4343 4662 5170 1697877.03 Antigenic activity of irradiated BXD spleen cells for Thy-1+CD3+CD4+CD8- T-cell clone 11.4 B/c [Thymidine uptake cpm] The relative contribution of individual non-H-2 Ag and of T cell subsets that initiate graft-vs-host reaction (GVHR) as well as the mechanism responsible for histopathologic lesions are still a matter of debate. To address these questions and to favor the selection of T cells primed in vivo against non-H-2 Ag important in GVHR we derived T cell clones from spleens of (DBA/2 x B10.D2)F1 (H-2d) mice developing this reaction after the graft of B10.D2 (H-2d) cells incompatible for numerous non-H-2 Ag plus Mlsa. The pattern of reactivity of eight selected clones against cells from different strains of mice including (BXD)RI strains indicated that one CD4+ clone is specific for Mlsa and seven additional clones (six CD4+ and one CD8+) are specific for four different non-H-2 Ag (Ag.I-IV) and proliferate in an H-2-restricted manner. The same series of experiments suggested that Ag.I and II are poorly polymorphic and allowed to propose the localisation of the genes controlling Ag.I (chromosome 1) and Ag.III (chromosome 4). All the clones show a triple (alpha, beta, gamma) mRNA transcript for TCR but at their surface they express the alpha/beta-heterodimer. The clone specific for Mlsa expresses V beta 6 and that specific for Ag.IV expresses V beta 8.1. Rapid mortality accompanied by clinical and histologic signs of severe GVHR was observed after administration of CD4+ clones (together with host-syngeneic bone marrow) derived early after grafting and specific for Ag.I and II but not after administration of: 1) CD8+ cytolytic clone derived early after grafting and specific for Ag.IV; 2) CD4+ clones derived late after grafting and specific for Ag.III; and 3) CD4+ clone specific for Mlsa. A clear correlation was established between the capacity of CD4+ clones to induce GVHR mortality, to mediate host-specific DTH and to release a high level of TNF. In conclusion: 1) the reaction against a single non-H-2 Ag is sufficient to provoke lethal GVHR; 2) the capacity to provoke GVHR mortality depends on antigenic specificity and functional properties of the responding clones; 3) the inflammatory process mediated by CD4+ clones may play a major role whereas the specific CD8+ T cell-mediated cytolytic activity is not necessarily lethal. Miconnet I, Huchet R, Bonardelle D, Motta R, Canon C, Garay-Rojas E, Kress M, Reynes M, Halle-Pannenko O, Bruley-Rosset M. Graft-versus-host mortality induced by noncytolytic CD4+ T cell clones specific for non-H-2 antigens J Immunol 145(7) 2123-2131 Oct 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1697877&dopt=Abstract 1697877 04 MF cpm 221 145 161 173 25194 17405 457 304 6760 8570 8299 1697877.04 Antigenic activity of irradiated BXD spleen cells for Thy-1+CD3+CD4+CD8- T-cell clone TGVH 9 [Thymidine uptake cpm] The relative contribution of individual non-H-2 Ag and of T cell subsets that initiate graft-vs-host reaction (GVHR) as well as the mechanism responsible for histopathologic lesions are still a matter of debate. To address these questions and to favor the selection of T cells primed in vivo against non-H-2 Ag important in GVHR we derived T cell clones from spleens of (DBA/2 x B10.D2)F1 (H-2d) mice developing this reaction after the graft of B10.D2 (H-2d) cells incompatible for numerous non-H-2 Ag plus Mlsa. The pattern of reactivity of eight selected clones against cells from different strains of mice including (BXD)RI strains indicated that one CD4+ clone is specific for Mlsa and seven additional clones (six CD4+ and one CD8+) are specific for four different non-H-2 Ag (Ag.I-IV) and proliferate in an H-2-restricted manner. The same series of experiments suggested that Ag.I and II are poorly polymorphic and allowed to propose the localisation of the genes controlling Ag.I (chromosome 1) and Ag.III (chromosome 4). All the clones show a triple (alpha, beta, gamma) mRNA transcript for TCR but at their surface they express the alpha/beta-heterodimer. The clone specific for Mlsa expresses V beta 6 and that specific for Ag.IV expresses V beta 8.1. Rapid mortality accompanied by clinical and histologic signs of severe GVHR was observed after administration of CD4+ clones (together with host-syngeneic bone marrow) derived early after grafting and specific for Ag.I and II but not after administration of: 1) CD8+ cytolytic clone derived early after grafting and specific for Ag.IV; 2) CD4+ clones derived late after grafting and specific for Ag.III; and 3) CD4+ clone specific for Mlsa. A clear correlation was established between the capacity of CD4+ clones to induce GVHR mortality, to mediate host-specific DTH and to release a high level of TNF. In conclusion: 1) the reaction against a single non-H-2 Ag is sufficient to provoke lethal GVHR; 2) the capacity to provoke GVHR mortality depends on antigenic specificity and functional properties of the responding clones; 3) the inflammatory process mediated by CD4+ clones may play a major role whereas the specific CD8+ T cell-mediated cytolytic activity is not necessarily lethal. Miconnet I, Huchet R, Bonardelle D, Motta R, Canon C, Garay-Rojas E, Kress M, Reynes M, Halle-Pannenko O, Bruley-Rosset M. Graft-versus-host mortality induced by noncytolytic CD4+ T cell clones specific for non-H-2 antigens J Immunol 145(7) 2123-2131 Oct 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1697877&dopt=Abstract 1697877 05 MF cpm 13801 463 235 407 387 359 424 38485 12698 134 158 47300 1697877.05 Antigenic activity of irradiated BXD spleen cells for Thy-1+CD3+CD4+CD8- T-cell clone TGVH32 [Thymidine uptake cpm] The relative contribution of individual non-H-2 Ag and of T cell subsets that initiate graft-vs-host reaction (GVHR) as well as the mechanism responsible for histopathologic lesions are still a matter of debate. To address these questions and to favor the selection of T cells primed in vivo against non-H-2 Ag important in GVHR we derived T cell clones from spleens of (DBA/2 x B10.D2)F1 (H-2d) mice developing this reaction after the graft of B10.D2 (H-2d) cells incompatible for numerous non-H-2 Ag plus Mlsa. The pattern of reactivity of eight selected clones against cells from different strains of mice including (BXD)RI strains indicated that one CD4+ clone is specific for Mlsa and seven additional clones (six CD4+ and one CD8+) are specific for four different non-H-2 Ag (Ag.I-IV) and proliferate in an H-2-restricted manner. The same series of experiments suggested that Ag.I and II are poorly polymorphic and allowed to propose the localisation of the genes controlling Ag.I (chromosome 1) and Ag.III (chromosome 4). All the clones show a triple (alpha, beta, gamma) mRNA transcript for TCR but at their surface they express the alpha/beta-heterodimer. The clone specific for Mlsa expresses V beta 6 and that specific for Ag.IV expresses V beta 8.1. Rapid mortality accompanied by clinical and histologic signs of severe GVHR was observed after administration of CD4+ clones (together with host-syngeneic bone marrow) derived early after grafting and specific for Ag.I and II but not after administration of: 1) CD8+ cytolytic clone derived early after grafting and specific for Ag.IV; 2) CD4+ clones derived late after grafting and specific for Ag.III; and 3) CD4+ clone specific for Mlsa. A clear correlation was established between the capacity of CD4+ clones to induce GVHR mortality, to mediate host-specific DTH and to release a high level of TNF. In conclusion: 1) the reaction against a single non-H-2 Ag is sufficient to provoke lethal GVHR; 2) the capacity to provoke GVHR mortality depends on antigenic specificity and functional properties of the responding clones; 3) the inflammatory process mediated by CD4+ clones may play a major role whereas the specific CD8+ T cell-mediated cytolytic activity is not necessarily lethal. Miconnet I, Huchet R, Bonardelle D, Motta R, Canon C, Garay-Rojas E, Kress M, Reynes M, Halle-Pannenko O, Bruley-Rosset M. Graft-versus-host mortality induced by noncytolytic CD4+ T cell clones specific for non-H-2 antigens J Immunol 145(7) 2123-2131 Oct 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1697877&dopt=Abstract 1697877 06 MF cpm 21536 656 575 201 249 335 465 32232 20878 425 169 18342 1697877.06 Antigenic activity of irradiated BXD spleen cells for Thy-1+CD3+CD4-CD8+ H-2(d) specific T-cell clone F10 ECK [Thymidine uptake cpm] The relative contribution of individual non-H-2 Ag and of T cell subsets that initiate graft-vs-host reaction (GVHR) as well as the mechanism responsible for histopathologic lesions are still a matter of debate. To address these questions and to favor the selection of T cells primed in vivo against non-H-2 Ag important in GVHR we derived T cell clones from spleens of (DBA/2 x B10.D2)F1 (H-2d) mice developing this reaction after the graft of B10.D2 (H-2d) cells incompatible for numerous non-H-2 Ag plus Mlsa. The pattern of reactivity of eight selected clones against cells from different strains of mice including (BXD)RI strains indicated that one CD4+ clone is specific for Mlsa and seven additional clones (six CD4+ and one CD8+) are specific for four different non-H-2 Ag (Ag.I-IV) and proliferate in an H-2-restricted manner. The same series of experiments suggested that Ag.I and II are poorly polymorphic and allowed to propose the localisation of the genes controlling Ag.I (chromosome 1) and Ag.III (chromosome 4). All the clones show a triple (alpha, beta, gamma) mRNA transcript for TCR but at their surface they express the alpha/beta-heterodimer. The clone specific for Mlsa expresses V beta 6 and that specific for Ag.IV expresses V beta 8.1. Rapid mortality accompanied by clinical and histologic signs of severe GVHR was observed after administration of CD4+ clones (together with host-syngeneic bone marrow) derived early after grafting and specific for Ag.I and II but not after administration of: 1) CD8+ cytolytic clone derived early after grafting and specific for Ag.IV; 2) CD4+ clones derived late after grafting and specific for Ag.III; and 3) CD4+ clone specific for Mlsa. A clear correlation was established between the capacity of CD4+ clones to induce GVHR mortality, to mediate host-specific DTH and to release a high level of TNF. In conclusion: 1) the reaction against a single non-H-2 Ag is sufficient to provoke lethal GVHR; 2) the capacity to provoke GVHR mortality depends on antigenic specificity and functional properties of the responding clones; 3) the inflammatory process mediated by CD4+ clones may play a major role whereas the specific CD8+ T cell-mediated cytolytic activity is not necessarily lethal. Miconnet I, Huchet R, Bonardelle D, Motta R, Canon C, Garay-Rojas E, Kress M, Reynes M, Halle-Pannenko O, Bruley-Rosset M. Graft-versus-host mortality induced by noncytolytic CD4+ T cell clones specific for non-H-2 antigens J Immunol 145(7) 2123-2131 Oct 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1697877&dopt=Abstract 1697877 07 MF cpm 5234 3138 340 3766 5407 289 2580 5023 4804 2413 2244 4130 1697877.07 Antigenic activity of irradiated BXD spleen cells for Thy-1+CD3+CD4+CD8- Mls(a) specific T-cell clone F5J10 [Thymidine uptake cpm] The relative contribution of individual non-H-2 Ag and of T cell subsets that initiate graft-vs-host reaction (GVHR) as well as the mechanism responsible for histopathologic lesions are still a matter of debate. To address these questions and to favor the selection of T cells primed in vivo against non-H-2 Ag important in GVHR we derived T cell clones from spleens of (DBA/2 x B10.D2)F1 (H-2d) mice developing this reaction after the graft of B10.D2 (H-2d) cells incompatible for numerous non-H-2 Ag plus Mlsa. The pattern of reactivity of eight selected clones against cells from different strains of mice including (BXD)RI strains indicated that one CD4+ clone is specific for Mlsa and seven additional clones (six CD4+ and one CD8+) are specific for four different non-H-2 Ag (Ag.I-IV) and proliferate in an H-2-restricted manner. The same series of experiments suggested that Ag.I and II are poorly polymorphic and allowed to propose the localisation of the genes controlling Ag.I (chromosome 1) and Ag.III (chromosome 4). All the clones show a triple (alpha, beta, gamma) mRNA transcript for TCR but at their surface they express the alpha/beta-heterodimer. The clone specific for Mlsa expresses V beta 6 and that specific for Ag.IV expresses V beta 8.1. Rapid mortality accompanied by clinical and histologic signs of severe GVHR was observed after administration of CD4+ clones (together with host-syngeneic bone marrow) derived early after grafting and specific for Ag.I and II but not after administration of: 1) CD8+ cytolytic clone derived early after grafting and specific for Ag.IV; 2) CD4+ clones derived late after grafting and specific for Ag.III; and 3) CD4+ clone specific for Mlsa. A clear correlation was established between the capacity of CD4+ clones to induce GVHR mortality, to mediate host-specific DTH and to release a high level of TNF. In conclusion: 1) the reaction against a single non-H-2 Ag is sufficient to provoke lethal GVHR; 2) the capacity to provoke GVHR mortality depends on antigenic specificity and functional properties of the responding clones; 3) the inflammatory process mediated by CD4+ clones may play a major role whereas the specific CD8+ T cell-mediated cytolytic activity is not necessarily lethal. Miconnet I, Huchet R, Bonardelle D, Motta R, Canon C, Garay-Rojas E, Kress M, Reynes M, Halle-Pannenko O, Bruley-Rosset M. Graft-versus-host mortality induced by noncytolytic CD4+ T cell clones specific for non-H-2 antigens J Immunol 145(7) 2123-2131 Oct 1990 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=1697877&dopt=Abstract 1697877 08 MF cpm 266 259 12535 7934 109 261 6819 14339 9057 18358 18635 1697877.08 Blood glucose levels preinjection with 4g/kg of ethanol in females [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 02 Female 0-14 mg/dl 103.8 6.0 88.3 3.1 88.0 6.4 99.0 4.6 100.3 6.0 102.0 6.1 80.0 3.1 100.0 7.5 95.3 1.7 85.8 8.4 77.9 2.6 86.1 2.7 85.3 3.2 104.2 4.9 100.6 2.3 100.1 2.1 87.2 3.5 89.4 3.4 7/23/2003 MK Sullivan 12766619.02 Blood glucose levels preinjection with 4g/kg of ethanol in males [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 03 Male 0-10 mg/dl 122.7 6.7 98.3 4.7 87.8 1.9 112.1 3.5 108.5 7.4 113.2 3.7 109.5 3.2 86.0 3.8 106.2 4.0 111.6 5.4 81.3 6.3 89.7 2.7 84.3 4.1 89.6 3.4 121.5 3.3 95.0 8.5 105.2 4.6 112.7 10.1 87.8 4.4 7/23/2003 MK Sullivan 12766619.03 Blood glucose levels postinjection (120 min) with 4g/kg of ethanol in females [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 04 Female 0-14 mg/dl 163.0 28.9 117.8 3.0 127.7 6.1 137.0 14.1 138.6 9.9 105.2 7.8 125.9 5.6 113.0 16.1 120.3 4.7 76.2 5.6 109.3 6.0 106.7 3.2 111.3 10.7 127.7 6.2 113.0 3.2 132.0 9.8 95.2 8.4 110.1 5.9 7/23/2003 MK Sullivan 12766619.04 Blood glucose levels postinjection (120 min) with 4g/kg of ethanol in males [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 05 Male 0-10 mg/dl 234.2 23.9 152.5 7.5 166.6 22.8 155.0 8.0 187.0 7.7 184.7 3.1 138.2 9.9 118.4 7.3 130.2 17.5 138.3 6.9 119.0 20.1 137.0 6.6 111.1 8.7 151.4 9.8 231.9 12.3 149.0 15.0 188.6 13.9 182.2 6.3 140.0 8.4 7/23/2003 MK Sullivan 12766619.05 Blood glucose levels preinjection with saline in females [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 06 Female 0-14 mg/dl 105.4 6.5 90.0 3.5 93.4 3.7 94.2 4.8 102.7 3.4 100.0 0.0 87.1 2.7 87.7 7.8 70.3 10.7 81.6 10.3 77.8 3.5 83.5 2.4 82.2 4.0 98.4 2.9 95.8 4.3 102.1 5.5 86.5 3.7 7/23/2003 MK Sullivan 12766619.06 Blood glucose levels preinjection with saline in males [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 07 Male 0-10 mg/dl 117.8 3.8 104.0 4.6 95.6 4.5 113.2 4.3 120.0 24.0 107.5 1.4 102.2 4.3 87.5 5.2 114.0 3.3 109.6 6.9 77.7 4.5 92.6 3.5 86.0 4.6 90.2 5.1 125.6 9.1 101.7 6.9 105.5 4.2 86.1 6.0 7/23/2003 MK Sullivan 12766619.07 Blood glucose levels postinjection (120 min) with saline in females [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 08 Female 0-14 mg/dl 119.6 7.9 99.3 5.9 102.4 5.1 103.9 6.5 114.7 4.1 109.3 4.7 101.8 4.6 109.3 5.9 106.3 14.7 71.6 4.3 82.1 5.6 92.6 3.5 99.2 7.3 112.6 10.2 114.6 3.5 104.0 4.4 93.9 4.4 7/23/2003 MK Sullivan 12766619.08 Blood glucose levels postinjection (120 min) with saline in males [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 09 Male 0-10 mg/dl 140.8 11.0 117.2 3.1 121.6 4.9 130.4 3.7 145.0 10.0 120.7 4.0 130.0 10.4 103.4 7.2 118.0 5.1 104.3 1.4 86.1 8.3 90.3 5.2 90.0 5.7 108.5 6.2 154.0 8.6 143.0 15.1 111.2 4.0 101.6 10.2 7/23/2003 MK Sullivan 12766619.09 Body temperature preinjection with 4 g/kg of ethanol in females [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 10 Female 0-15 degrees C 37.4 0.3 37.7 0.3 37.7 0.3 37.4 0.3 37.4 0.3 37.5 0.7 37.8 0.2 37.4 0.1 37.4 0.6 37.1 0.4 36.9 0.3 37.3 0.2 37.2 0.4 37.8 0.3 37.9 0.2 37.7 0.3 37.2 0.4 37.3 0.3 37.1 0.3 7/23/2003 MK Sullivan 12766619.1 Body temperature preinjection with 4 g/kg of ethanol in males [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 11 Male 0-10 degrees C 37.3 0.5 37.4 0.3 37.4 0.4 36.9 0.3 36.9 0.5 37.6 0.5 37.7 0.4 37.1 0.5 37.0 0.4 37.0 0.4 36.0 0.7 36.9 0.3 36.7 0.3 37.0 0.5 37.5 0.3 36.9 0.7 37.8 0.5 37.5 0.5 37.0 0.5 7/23/2003 MK Sullivan 12766619.11 Body temperature postinjection (120 min) with 4 g/kg of ethanol in females [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 12 Female 0-15 degrees C 34.4 0.3 33.8 0.3 34.1 0.3 34.1 0.4 35.1 0.3 36.1 0.4 33.1 0.2 35.4 0.5 34.1 0.5 34.1 0.4 35.2 0.3 34.7 0.1 34.2 0.3 34.9 0.2 35.6 0.3 34.9 0.1 35.4 0.3 34.9 0.4 33.0 0.5 7/23/2003 MK Sullivan 12766619.12 Body temperature postinjection (120 min) with 4 g/kg of ethanol in males [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 01 Male 0-10 degrees C 34.7 0.2 33.5 0.3 33.8 0.3 33.9 0.3 34.8 0.5 34.8 0.2 35.4 0.2 33.6 0.5 34.2 0.4 33.2 0.7 34.2 0.4 34.8 0.3 34.4 0.2 34.1 0.5 34.4 0.2 34.0 0.4 35.1 0.1 34.5 0.5 34.0 0.4 7/23/2003 MK Sullivan 12766619.01 Body temperature preinjection with saline in females [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 13 Female 0-15 degrees C 37.4 0.5 37.7 0.1 37.7 0.4 37.1 0.4 37.3 0.3 37.9 0.4 37.9 0.2 37.5 0.5 37.4 0.9 37.0 0.3 36.9 0.3 37.3 0.2 37.1 0.5 37.4 0.3 37.8 0.2 37.5 0.4 37.0 0.4 37.5 0.3 37.5 0.3 7/23/2003 MK Sullivan 12766619.13 Body temperature preinjection with saline in males [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 14 Male 0-10 degrees C 37.1 0.6 37.0 0.5 37.7 0.4 37.0 0.3 37.2 0.4 37.3 0.7 37.6 1.0 37.1 0.4 37.7 0.3 37.3 0.6 36.5 0.4 37.0 0.3 36.6 0.3 36.9 0.5 37.6 0.4 36.8 0.6 37.8 0.4 37.7 0.7 37.1 0.5 7/23/2003 MK Sullivan 12766619.14 Body temperature postinjection (120 min) with saline in females [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 15 Female 0-15 degrees C 37.2 0.4 37.6 0.1 37.5 0.3 36.9 0.3 37.3 0.2 38.5 0.2 37.8 0.2 37.8 0.1 37.8 0.3 37.5 0.2 37.0 0.2 37.4 0.1 37.0 0.2 37.9 0.1 37.8 0.2 37.4 0.2 36.4 0.5 37.4 0.2 37.6 0.2 7/23/2003 MK Sullivan 12766619.15 Body temperature postinjection (120 min) with saline in males [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 16 Male 0-10 degrees C 37.4 0.3 37.5 0.2 37.2 0.4 37.2 0.1 37.2 0.4 36.5 0.8 37.6 0.6 37.6 0.3 37.7 0.1 37.6 0.7 37.1 0.4 37.2 0.1 37.3 0.3 37.2 0.2 37.3 0.2 37.4 0.4 37.2 0.3 38.1 0.4 37.5 0.3 7/23/2003 MK Sullivan 12766619.16 Blood glucose difference [postinjection minus preinjection (4g/kg ethanol test)] female [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 17 Female 0-14 mg/dl 60.3 24.2 30.0 1.3 40.4 6.3 38.6 10.8 40.0 7.4 4.1 9.0 47.0 5.1 13.2 8.3 25.7 5.8 -10.3 11.4 32.0 6.4 21.1 8.8 26.3 9.8 24.1 4.5 12.3 4.2 32.2 10.0 8.2 5.9 20.9 4.29 7/23/2003 MK Sullivan 12766619.17 Blood glucose difference [postinjection minus preinjection (4g/kg ethanol test)] male [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 18 Male 0-10 mg/dl 112.8 22.9 54.8 6.1 79.1 21.9 43.6 7.6 79.5 7.6 72.3 4.6 29.2 10.2 33.3 8.1 24.2 14.6 27.1 10.1 36.4 14.7 50.2 5.2 27.1 8.5 62.8 10.8 111.7 10.3 5.5 13.7 84.3 11.6 70.0 13.0 52.7 6.9 7/23/2003 MK Sullivan 12766619.18 Blood glucose difference [postinjection minus preinjection (saline test)] female [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 19 Female 0-14 mg/dl 14.7 7.1 10.2 7.1 9.0 5.4 10.2 7.9 12.1 5.5 9.6 4.4 15.2 5.1 22.2 13.0 36.8 7.3 -10.6 9.4 4.76 6.6 9.2 3.9 17.5 10.0 14.6 8.0 18.9 5.9 2.2 5.6 7.4 6.2 7/23/2003 MK Sullivan 12766619.19 Blood glucose difference [postinjection minus preinjection (saline test)] male [mg/dl] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 20 Male 0-10 mg/dl 23.0 11.6 13.1 4.5 26.2 7.2 17.9 3.7 25.2 13.8 13.4 4.3 28.6 9.5 16.1 9.7 4.1 2.5 -5.4 5.9 8.7 5.8 -2.4 4.9 3.4 6.0 18.2 2.6 28.7 7.2 41.6 7.9 5.6 4.1 15.5 7.5 7/23/2003 MK Sullivan 12766619.2 Body temperature difference [postinjection minus preinjection (4 g/kg ethanol test)] female [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 21 Female 0-15 degrees C -2.9 0.5 -3.8 0.4 -3.6 0.5 -3.2 0.5 -2.3 0.4 -1.4 0.6 -4.6 0.3 -2.0 0.5 -3.3 0.7 -2.9 0.4 -1.7 0.3 -2.6 0.2 -3.0 0.4 -2.9 0.3 -2.4 0.3 -2.8 0.4 -1.8 0.5 -2.3 0.5 -4.1 0.8 7/23/2003 MK Sullivan 12766619.21 Body temperature difference [postinjection minus preinjection (4 g/kg ethanol test)] male [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 22 Male 0-10 degrees C -2.3 0.6 -3.9 0.5 -3.6 0.6 -3.0 0.6 -2.0 0.8 -2.8 0.7 -2.2 0.6 -3.5 0.4 -2.8 0.7 -3.9 0.6 -1.9 1.0 -2.1 0.5 -2.3 0.3 -2.9 0.8 -3.1 0.3 -2.9 0.6 -2.7 0.5 -3.0 0.9 -3.0 0.7 7/23/2003 MK Sullivan 12766619.22 Body temperature difference [postinjection minus preinjection (saline test)] female [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 23 Female 0-15 degrees C -0.2 0.4 -0.1 0.1 -0.1 0.3 -0.2 0.4 -0.1 0.1 0.6 0.2 -0.1 0.1 0.4 0.5 0.4 0.6 0.5 0.2 0.1 0.2 0.0 0.2 0.1 0.4 0.5 0.2 0.1 0.1 0.1 0.3 -0.6 0.6 -0.1 0.2 0.1 0.2 7/23/2003 MK Sullivan 12766619.23 Body temperature difference [postinjection minus preinjection (saline test)] male [degrees C] BACKGROUND:Genetic sensitivity to ethanol-induced hyperglycemia was hypothesized to be related to sensitivity to ethanol-induced hypothermia and conditioned taste aversion. These hypotheses were explored by characterizing blood glucose changes after ethanol exposure in BXD recombinant inbred mice.METHODS:Adult male and female BXD recombinant inbred mice were acutely exposed to 4 g/kg of ethanol or saline with the order of exposure counterbalanced, and separated by a 1-week interval. Tail blood samples and rectal temperatures were determined immediately before ethanol/saline exposure and 2 hr after exposure.RESULTS:Substantial strain differences in ethanol-induced hyperglycemia and hypothermia were noted. In addition, sex also determined sensitivity to ethanol-induced hyperglycemia and interacted with strain. Correlational analyses using strain means indicated that ethanol-induced hyperglycemia was genetically independent from ethanol-induced hypothermia or conditioned taste aversion. Quantitative trait locus (QTL) analyses indicated provisional QTL for ethanol-induced hyperglycemia on chromosomes 1, 3, 4, 6, 7, 9, 12, 14, and 18, which, in part, were sex specific.CONCLUSIONS:These findings indicate important sex differences in the glycemic response to ethanol. In addition, multiple genes likely control this response, independent from genes that are important for the thermic or aversive effects of ethanol. Risinger FO Genetic analyses of ethanol-induced hyperglycemia Alcohol Clin Exp Res 27(5) 756-764 May 2003 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=12766619&dopt=Abstract 12766619 24 Male 0-10 degrees C 0.3 0.4 0.5 0.3 -0.5 0.4 0.3 0.2 -0.1 0.2 -0.7 1.0 0.1 1.1 0.5 0.2 0.1 0.2 0.2 0.4 0.6 0.2 0.2 0.2 0.6 0.4 0.3 0.3 -0.3 0.2 0.7 0.4 -0.6 0.3 0.4 0.3 0.4 0.6 7/23/2003 MK Sullivan 12766619.24 Thymic T-cell response to anti-CD3-induced proliferation Thymic and peripheral T-cells from NOD mice display a proliferative unresponsiveness on stimulation through the T-cell receptor/CD3 complex. Interleukin 4 reverses NOD T-cell unresponsiveness in vitro and prevents the onset of diabetes in vivo, suggesting a causal relationship between the T-cell unresponsiveness and diabetes susceptibility in NOD mice. Both quantitative trait loci analysis of BXD recombinant inbred mice and linkage analysis of NOD outcross populations reveal that the control of NOD thymic T-cell proliferative unresponsiveness genetically maps to a central region on mouse chromosome 11, which includes the beta-chemokine gene family. This finding raises the possibility that a beta-chemokine(s) may regulate T-cell unresponsiveness as well as diabetes susceptibility in NOD mice. Gill BM, Jaramillo A, Ma L, Laupland KB, Delovitch TL Genetic linkage of thymic T-cell proliferative unresponsiveness to mouse chromosome 11 in NOD mice: A possible role for chemokine genes Diabetes 44(6) 614-619 Jun 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7789623&dopt=Abstract 7789623 8-12 wks 56 84 Female 3-10 17.99 2.841 29.53 3.707 2.84 0.000 34.51 6.017 43.11 10.593 4.20 1.222 27.22 6.541 2.66 0.000 33.20 6.967 7.65 1.441 2.37 0.000 4.86 0.000 17.19 5.185 3.07 0.000 1.83 0.000 3.29 0.000 5.07 1.037 40.15 8.259 22.96 7.859 17.36 1.852 27.61 7.076 5.54 3.712 5.04 1.356 31.48 6.991 47.96 9.041 8.45 1.833 7/23/2003 MK Sullivan 7789623 Total distance traveled 1 hour after 7.5 mg/kg PCP injection minus total distance traveled in response to 0.9% saline injection 1 hour prior to 7.5 mg/kg PCP injection [cm] Phencyclidine (PCP) and amphetamine (AMP) can induce psychotic syndromes in humans, whereas administration of these drugs to mice results in behavioral activation that is influenced by genetic factors. Quantitative trait loci (QTL) underlying genetic differences in response to PCP and AMP in mice were provisionally identified by correlating allelic variation at known marker loci in the BXD series of recombinant inbred (RI) mice and its progenitors (C57BL/6J and DBA/2J inbred strains) with the locomotor response of each strain to PCP and AMP. Total distance traveled for individual mice from each of the 26 BXD RI and two progenitor strains was measured after injections of normal saline and 7.5 mg/kg i.p. injection of PCP. This procedure was repeated after 1 week, using 5.0 mg/kg of AMP, instead of PCP. Markers significantly (p < .01) correlated with response to PCP map to murine chromosomes 1, 14, and 15. Response to amphetamine was correlated with markers mapping to chromosomes 4, 5, 6, 8, 14, and 18. Identification of the QTL underlying PCP-induced and AMP-induced behavior in mice may provide clues into the complicated genetics of psychosis in humans. Alexander RC, Wright R, Freed W Quantitative trait loci contributing to phencyclidine-induced and amphetamine-induced locomotor behavior in inbred mice. Neuropsychopharmacology 15(5) 484-490 Nov 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8914121&dopt=Abstract 8914121 01 8-12 wks 56 84 Female 7-17 cm 5525 631.7 5062 1135.4 4897 1048.2 4616 1123.2 612 329.3 4695 675.6 982 767.1 441 395.7 10276 1773.2 10420 1487.8 8905 980.5 2267 884.1 2620 486.6 3237 687.8 2999 824.4 6160 1495.1 12184 2443.9 688 419.5 4218 761.0 8182 1141.5 1165 323.2 6391 1658.5 1159 458.5 245 98.8 2633 876.8 2805 761.0 5463 1791.5 3298 1423.8 8/1/2003 MK Sullivan 8914121.01 Total distance traveled 1 hour after 7.5 mg/kg PCP injection [cm] Phencyclidine (PCP) and amphetamine (AMP) can induce psychotic syndromes in humans, whereas administration of these drugs to mice results in behavioral activation that is influenced by genetic factors. Quantitative trait loci (QTL) underlying genetic differences in response to PCP and AMP in mice were provisionally identified by correlating allelic variation at known marker loci in the BXD series of recombinant inbred (RI) mice and its progenitors (C57BL/6J and DBA/2J inbred strains) with the locomotor response of each strain to PCP and AMP. Total distance traveled for individual mice from each of the 26 BXD RI and two progenitor strains was measured after injections of normal saline and 7.5 mg/kg i.p. injection of PCP. This procedure was repeated after 1 week, using 5.0 mg/kg of AMP, instead of PCP. Markers significantly (p < .01) correlated with response to PCP map to murine chromosomes 1, 14, and 15. Response to amphetamine was correlated with markers mapping to chromosomes 4, 5, 6, 8, 14, and 18. Identification of the QTL underlying PCP-induced and AMP-induced behavior in mice may provide clues into the complicated genetics of psychosis in humans. Alexander RC, Wright R, Freed W Quantitative trait loci contributing to phencyclidine-induced and amphetamine-induced locomotor behavior in inbred mice. Neuropsychopharmacology 15(5) 484-490 Nov 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8914121&dopt=Abstract 8914121 02 8-12 wks 56 84 Female 7-17 cm 6180 5274 6307 5459 1487 5691 3709 1499 10922 12818 2999 2743 3011 4322 3763 6456 11556 1873 4541 7795 1426 7287 2635 684 4337 3938 6035 4701 8/1/2003 MK Sullivan 8914121.02 Distance traveled in response to 0.9% saline injection 1 hour prior to injection of 7.5 mg/kg PCP [cm] Phencyclidine (PCP) and amphetamine (AMP) can induce psychotic syndromes in humans, whereas administration of these drugs to mice results in behavioral activation that is influenced by genetic factors. Quantitative trait loci (QTL) underlying genetic differences in response to PCP and AMP in mice were provisionally identified by correlating allelic variation at known marker loci in the BXD series of recombinant inbred (RI) mice and its progenitors (C57BL/6J and DBA/2J inbred strains) with the locomotor response of each strain to PCP and AMP. Total distance traveled for individual mice from each of the 26 BXD RI and two progenitor strains was measured after injections of normal saline and 7.5 mg/kg i.p. injection of PCP. This procedure was repeated after 1 week, using 5.0 mg/kg of AMP, instead of PCP. Markers significantly (p < .01) correlated with response to PCP map to murine chromosomes 1, 14, and 15. Response to amphetamine was correlated with markers mapping to chromosomes 4, 5, 6, 8, 14, and 18. Identification of the QTL underlying PCP-induced and AMP-induced behavior in mice may provide clues into the complicated genetics of psychosis in humans. Alexander RC, Wright R, Freed W Quantitative trait loci contributing to phencyclidine-induced and amphetamine-induced locomotor behavior in inbred mice. Neuropsychopharmacology 15(5) 484-490 Nov 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8914121&dopt=Abstract 8914121 03 8-12 wks 56 84 Female 7-17 cm 605 273 2029 957 361 1062 1980 1184 718 2416 245 560 532 1123 751 209 659 1294 609 1615 284 988 443 442 1847 1037 663 1598 8/1/2003 MK Sullivan 8914121.03 Total distance traveled 1 hour after 5 mg/kg amphetamine injection minus total distance traveled in response to 0.9% saline injection 1 hour prior to 5 mg/kg amphetamine injection [cm] Phencyclidine (PCP) and amphetamine (AMP) can induce psychotic syndromes in humans, whereas administration of these drugs to mice results in behavioral activation that is influenced by genetic factors. Quantitative trait loci (QTL) underlying genetic differences in response to PCP and AMP in mice were provisionally identified by correlating allelic variation at known marker loci in the BXD series of recombinant inbred (RI) mice and its progenitors (C57BL/6J and DBA/2J inbred strains) with the locomotor response of each strain to PCP and AMP. Total distance traveled for individual mice from each of the 26 BXD RI and two progenitor strains was measured after injections of normal saline and 7.5 mg/kg i.p. injection of PCP. This procedure was repeated after 1 week, using 5.0 mg/kg of AMP, instead of PCP. Markers significantly (p < .01) correlated with response to PCP map to murine chromosomes 1, 14, and 15. Response to amphetamine was correlated with markers mapping to chromosomes 4, 5, 6, 8, 14, and 18. Identification of the QTL underlying PCP-induced and AMP-induced behavior in mice may provide clues into the complicated genetics of psychosis in humans. Alexander RC, Wright R, Freed W Quantitative trait loci contributing to phencyclidine-induced and amphetamine-induced locomotor behavior in inbred mice. Neuropsychopharmacology 15(5) 484-490 Nov 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8914121&dopt=Abstract 8914121 04 8-12 wks 56 84 Female 7-17 cm 4844 1030.7 7801 1036.0 13196 1959.4 4389 631.4 6627 983.1 8699 1848.3 2973 911.1 8065 714.3 2881 766.3 2461 910.3 5670 1097.3 4267 1072.8 9238 2406.1 414 337.2 4438 1319.5 8887 2070.5 4821 780.1 9263 658.2 6573 749.4 5800 1051.3 10645 1578.5 8489 1993.1 15450 2591.6 4772 606.9 4507 1135.6 4413 744.8 5166 908.8 6022 1511.1 8/1/2003 MK Sullivan 8914121.04 Total distance traveled 1 hour after 5 mg/kg amphetamine injection [cm] Phencyclidine (PCP) and amphetamine (AMP) can induce psychotic syndromes in humans, whereas administration of these drugs to mice results in behavioral activation that is influenced by genetic factors. Quantitative trait loci (QTL) underlying genetic differences in response to PCP and AMP in mice were provisionally identified by correlating allelic variation at known marker loci in the BXD series of recombinant inbred (RI) mice and its progenitors (C57BL/6J and DBA/2J inbred strains) with the locomotor response of each strain to PCP and AMP. Total distance traveled for individual mice from each of the 26 BXD RI and two progenitor strains was measured after injections of normal saline and 7.5 mg/kg i.p. injection of PCP. This procedure was repeated after 1 week, using 5.0 mg/kg of AMP, instead of PCP. Markers significantly (p < .01) correlated with response to PCP map to murine chromosomes 1, 14, and 15. Response to amphetamine was correlated with markers mapping to chromosomes 4, 5, 6, 8, 14, and 18. Identification of the QTL underlying PCP-induced and AMP-induced behavior in mice may provide clues into the complicated genetics of psychosis in humans. Alexander RC, Wright R, Freed W Quantitative trait loci contributing to phencyclidine-induced and amphetamine-induced locomotor behavior in inbred mice. Neuropsychopharmacology 15(5) 484-490 Nov 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8914121&dopt=Abstract 8914121 05 8-12 wks 56 84 Female 7-17 cm 6251 7137 14117 4990 6820 10392 4061 9382 3238 3389 6222 5243 9746 1756 5539 9105 5021 10467 6910 6730 10844 10070 15944 5005 5479 5925 5533 6867 8/1/2003 MK Sullivan 8914121.05 Distance traveled in response to 0.9% saline injection 1 hour prior to injection of 5 mg/kg amphetamine [cm] Phencyclidine (PCP) and amphetamine (AMP) can induce psychotic syndromes in humans, whereas administration of these drugs to mice results in behavioral activation that is influenced by genetic factors. Quantitative trait loci (QTL) underlying genetic differences in response to PCP and AMP in mice were provisionally identified by correlating allelic variation at known marker loci in the BXD series of recombinant inbred (RI) mice and its progenitors (C57BL/6J and DBA/2J inbred strains) with the locomotor response of each strain to PCP and AMP. Total distance traveled for individual mice from each of the 26 BXD RI and two progenitor strains was measured after injections of normal saline and 7.5 mg/kg i.p. injection of PCP. This procedure was repeated after 1 week, using 5.0 mg/kg of AMP, instead of PCP. Markers significantly (p < .01) correlated with response to PCP map to murine chromosomes 1, 14, and 15. Response to amphetamine was correlated with markers mapping to chromosomes 4, 5, 6, 8, 14, and 18. Identification of the QTL underlying PCP-induced and AMP-induced behavior in mice may provide clues into the complicated genetics of psychosis in humans. Alexander RC, Wright R, Freed W Quantitative trait loci contributing to phencyclidine-induced and amphetamine-induced locomotor behavior in inbred mice. Neuropsychopharmacology 15(5) 484-490 Nov 1996 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=8914121&dopt=Abstract 8914121 06 8-12 wks 56 84 Female 7-17 cm 841 431 996 911 423 1795 798 1465 413 1090 582 592 645 1565 1195 201 314 1370 642 688 202 1789 586.2 277 1074 1143 460 1003 8/1/2003 MK Sullivan 8914121.06 Mean tumor multiplicity in liver after infection with 0.01 ml/g body wt N,N-diethylnitrosamine [number of tumors] Male DBA/2J mice are approximately 20-fold more susceptible than male C57BL/6J mice to hepatocarcinogenesis induced by perinatal treatment with N,N-diethylnitrosamine (DEN). In order to elucidate the genetic control of hepatocarcinogenesis in DBA/2J mice, male BXD recombinant inbred, D2B6F1 x B6 backcross, and D2B6F2 intercross mice were treated at 12 days of age with DEN and liver tumors were enumerated at 32 weeks. Interestingly, the distribution of mean tumor multiplicities among BXD recombinant inbred strains indicated that hepatocarcinogen-sensitive DBA/2 mice carry multiple genes with opposing effects on the susceptibility to liver tumor induction. By analyzing D2B6F1 x B6 backcross and D2B6F2 intercross mice for their liver tumor multiplicity phenotypes and for their genotypes at simple sequence repeat marker loci, we mapped two resistance genes carried by DBA/2J mice, designated Hcr1 and -2, to chromosomes 4 and 10, respectively. Hcr1 and Hcr2 resolved the genetic variance in the backcross population well, indicating that these resistance loci are the major determinants of the variance in the backcross population. Although our collection of 100 simple sequence repeat markers allowed linkage analysis for approximately 95% of the genome, we failed to map any sensitivity alleles for DBA/2J mice. Thus, it is likely that the susceptibility of DBA/2J mice is the consequence of the combined effects of multiple sensitivity loci. Lee GH, Bennett LM, Carabeo RA, Drinkwater NR Identification of hepatocarcinogen-resistance genes in DBA/2 mice Genetics 139(1) 387-395 Jan 1995 http://www.ncbi.nlm.nih.gov:80/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=7705639&dopt=Abstract 7705639 95220677 01 32 wks 224 Male 11-40 number of tumors 1.6 0.5 31 4 2.7 0.9 14 2 22 2 1.3 0.4 18 3 63 3 1.7 0.4 8.2 3.6 0.06 0.04 22 2 16 2 43 3 14 2 5.8 1.2 15 2 12 2 14 3 5.6 1.0 2.3 0.6 3.5 1.0 8.6 1.3 8.1 1.5 8/4/2003 MK Sullivan 7705639.01 Locomotor activity after 0.25 mg/kg of paraoxon from 1-5 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 03 7 wks 49 Male 3-10 activity counts/min 78.8 7.1 55.0 4.6 94.1 8.1 82.2 18.0 43.4 4.7 84.3 16.1 45.2 6.1 36.0 2.2 48.7 5.1 49.5 1.9 90.5 10.3 55.7 4.4 46.7 6.7 77.0 16.9 73.3 14.7 46.0 4.7 44.2 1.7 60.6 6.3 57.8 6.6 38.8 4.4 105.5 9.8 55.1 4.9 58.8 3.3 52.4 4.6 7/13/2003 MK Sullivan MK Sullivan 11106859.03 Locomotor activity after 10 ml/kg of oil from 1-5 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 04 7 wks 49 Male 3-10 activity counts/min 76.2 6.5 66.7 4.9 100.3 11.8 64.4 7.2 43.6 7.1 97.3 12.2 48.5 2.8 42.6 4.0 65.1 6.6 58.7 6.7 98.0 10.6 60.3 3.5 61.2 4.3 79.7 11.4 71.4 7.3 66.4 4.9 48.5 2.6 61.2 4.1 57.4 8.6 41.0 3.4 117.5 13.6 58.8 6.7 63.5 14.1 61.7 7.2 7/13/2003 MK Sullivan MK Sullivan 11106859.04 Locomotor activity after 0.25 mg/kg of paraoxon from 6-10 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 05 7 wks 49 Male 3-10 activity counts/min 26.2 7.1 13.2 2.5 29.3 4.0 41.8 10.5 15.9 1.3 43.1 5.1 26.4 4.4 19.8 4.0 20.6 5.3 8.1 1.3 33.8 3.4 17.6 4.8 12.6 2.6 34.5 11.3 25.8 7.2 16.2 3.9 6.1 2.1 25.2 3.3 27.4 6.0 11.3 2.7 42.9 6.1 29.5 5.9 14.2 1.5 9.2 1.6 7/13/2003 MK Sullivan MK Sullivan 11106859.05 Locomotor activity after 10 ml/kg of oil from 6-10 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 06 7 wks 49 Male 3-10 activity counts/min 45.3 5.4 50.6 4.3 64.1 12.6 35.3 10.2 24.0 6.1 60.7 7.8 35.5 7.7 25.9 3.1 39.9 2.0 33.6 5.6 42.7 3.7 29.3 5.0 36.5 4.3 42.0 7.0 51.0 4.5 44.2 2.1 27.1 3.3 47.3 3.6 34.2 5.1 26.5 5.0 61.4 12.5 30.1 5.6 38.8 4.6 40.1 7.2 7/13/2003 MK Sullivan MK Sullivan 11106859.06 Locomotor activity after 0.25 mg/kg of paraoxon from 11-15 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 07 7 wks 49 Male 3-10 activity counts/min 22.4 5.1 6.3 1.9 16.8 3.5 33.4 10.9 10.3 1.4 28.6 8.7 23.9 3.1 6.7 1.8 18.5 4.3 4.9 0.9 24.6 3.8 9.6 4.0 6.5 1.5 18.3 6.8 12.5 4.6 13.7 3.0 3.3 1.1 19.5 5.3 22.6 6.9 7.0 1.9 21.8 2.6 19.1 3.8 6.9 0.9 5.1 1.0 7/13/2003 MK Sullivan MK Sullivan 11106859.07 Locomotor activity after 10 ml/kg of oil from 11-15 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 08 7 wks 49 Male 3-10 activity counts/min 41.2 5.4 41.1 3.5 50.4 13.3 20.0 8.5 26.1 4.6 46.5 6.6 37.6 3.8 28.0 3.5 37.8 5.3 30.2 3.4 36.2 3.7 26.1 2.4 27.8 4.9 35.0 6.1 37.1 6.5 37.0 2.7 21.3 5.2 40.8 3.7 32.4 3.9 22.6 3.3 41.3 7.9 26.5 8.4 31.0 7.1 42.5 5.9 7/13/2003 MK Sullivan MK Sullivan 11106859.08 Locomotor activity after 0.25 mg/kg of paraoxon from 16-20 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 09 7 wks 49 Male 3-10 activity counts/min 17.6 3.8 3.8 1.1 10.7 2.4 29.7 11.0 4.9 0.7 25.7 11.7 18.6 3.3 10.6 5.8 15.6 6.0 2.5 1.4 21.1 6.0 7.6 4.3 6.8 2.9 20.9 9.6 8.4 2.4 10.9 2.3 0.8 0.5 17.2 7.2 16.5 6.9 6.4 2.3 15.0 3.9 21.1 4.5 3.7 1.3 2.0 0.6 7/13/2003 MK Sullivan MK Sullivan 11106859.09 Locomotor activity after 10 ml/kg of oil from 16-20 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 10 7 wks 49 Male 3-10 activity counts/min 42.7 3.9 42.8 5.8 53.2 10.4 22.4 7.9 19.4 6.0 36.4 8.1 31.7 4.0 29.6 4.0 33.6 4.3 29.3 3.5 37.6 2.8 26.7 2.1 18.9 2.8 29.3 6.7 33.8 5.6 36.4 3.8 17.5 6.3 32.5 3.8 29.4 3.5 20.9 5.5 42.5 9.7 23.3 6.5 30.9 4.7 36.2 4.7 7/13/2003 MK Sullivan MK Sullivan 11106859.1 Locomotor activity after 0.25 mg/kg of paraoxon from 21-25 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 11 7 wks 49 Male 3-10 activity counts/min 12.9 5.3 3.8 1.2 4.2 1.3 37.6 10.0 6.2 4.4 25.3 9.3 15.2 5.8 8.1 2.7 13.1 6.2 2.5 1.3 15.2 4.1 4.3 2.0 10.1 5.1 13.0 5.8 9.8 3.7 8.7 2.7 1.7 1.0 12.2 6.5 16.3 5.6 4.4 1.9 16.3 2.9 13.3 4.1 2.9 0.8 1.9 0.7 7/13/2003 MK Sullivan MK Sullivan 11106859.11 Locomotor activity after 10 ml/kg of oil from 21-25 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 12 7 wks 49 Male 3-10 activity counts/min 36.7 5.6 41.4 4.4 37.6 11.1 26.2 8.8 19.0 7.6 37.5 6.8 31.2 2.7 31.8 6.5 30.4 7.2 20.8 7.2 38.7 8.6 19.1 4.1 27.6 4.9 24.0 5.8 32.6 4.6 33.8 2.6 26.0 8.2 35.1 5.7 24.8 4.2 15.7 3.1 38.7 8.2 25.4 4.8 31.0 5.1 35.5 7.7 7/13/2003 MK Sullivan MK Sullivan 11106859.12 Locomotor activity after 0.25 mg/kg of paraoxon from 26-30 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 13 7 wks 49 Male 3-10 activity counts/min 16.2 6.0 3.2 1.4 2.6 1.4 30.6 8.1 5.3 3.5 27.0 8.6 16.4 3.4 8.4 2.6 5.6 1.7 0.7 0.6 17.2 5.2 5.0 2.2 7.7 3.2 24.0 10.3 6.6 2.0 6.9 2.9 3.5 2.0 13.1 6.8 19.1 5.0 6.9 2.6 17.9 3.2 12.1 3.7 3.6 2.3 2.3 0.6 7/13/2003 MK Sullivan MK Sullivan 11106859.13 Locomotor activity after 10 ml/kg of oil from 26-30 min [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 14 7 wks 49 Male 3-10 activity counts/min 38.3 4.6 34.8 4.9 38.2 8.8 30.6 12.0 29.8 10.0 36.6 4.2 32.1 2.8 27.6 3.6 29.1 3.1 17.0 7.4 41.2 4.9 25.6 5.6 17.7 3.7 23.6 4.0 40.4 5.5 27.2 5.9 11.0 2.8 28.4 5.1 21.2 3.8 17.4 4.5 33.8 7.7 23.5 8.5 25.8 5.0 33.2 6.6 7/13/2003 MK Sullivan MK Sullivan 11106859.14 Locomotor activity after 0.25 mg/kg of paraoxon in first 15 min of 30 min activity test [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 15 7 wks 49 Male 3-10 activity counts/min 43.1 4.92 25.3 2.05 48.1 4.01 52.8 11.91 23.6 1.20 53.0 5.85 32.6 4.13 21.8 1.94 29.3 4.96 21.7 0.85 50.8 4.80 28.6 4.04 22.4 2.65 43.7 10.20 37.6 7.96 25.1 2.97 18.2 1.07 35.7 2.89 36.8 5.85 19.5 2.13 57.9 5.85 34.7 3.94 27.3 0.74 22.6 2.01 7/13/2003 MK Sullivan MK Sullivan 11106859.15 Locomotor activity after 10 ml/kg of oil in first 15 min of 30 min activity test [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 16 7 wks 49 Male 3-10 activity counts/min 54.1 3.95 53.8 2.99 26.3 11.82 40.4 5.94 31.4 4.97 68.7 6.84 41.6 3.54 32.2 2.93 49.9 2.00 41.8 4.92 60.0 5.80 39.6 1.69 42.5 2.85 52.7 3.67 53.9 5.91 49.8 2.94 32.2 1.90 50.6 2.79 41.5 5.16 30.4 3.67 73.7 10.73 38.6 6.93 44.3 7.01 48.8 4.93 7/13/2003 MK Sullivan MK Sullivan 11106859.16 Locomotor activity after 0.25 mg/kg of paraoxon in last 15 min of 30 min activity test [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 17 7 wks 49 Male 3-10 activity counts/min 16.3 3.90 4.3 0.87 6.3 0.85 33.5 8.94 5.7 1.13 26.0 10.15 17.6 4.04 9.5 4.04 11.4 4.18 2.5 0.33 18.9 4.92 6.3 2.00 8.5 4.04 19.5 7.59 8.4 1.92 9.4 2.24 2.5 1.08 14.5 6.92 17.3 5.26 6.2 1.92 16.4 3.02 15.5 4.24 3.7 1.12 2.26 0.68 7/13/2003 MK Sullivan MK Sullivan 11106859.17 Locomotor activity after after 10 ml/kg of oil in last 15 min of 30 min activity test [activity counts/min] Genetic mechanisms responsible for organophosphate (OP)-induced behavioral changes remain obscure. In the present study, provisional quantitative trait loci (QTL) associated with acute sensitivity or insensitivity to hypolocomotion produced by the OP paraoxon were identified. Naive adult male and female mice of the BXD/Ty series (22 different BXD strains plus C57BL/6J and DBA/2J progenitor strains) received 0 or 0.25 mg/kg paraoxon (IP), immediately before placement in an activity chamber for a 30-min test. As expected, based on dose-response and time course studies with Swiss-Webster, C57BL/6, and DBA/2 mice, paraoxon treatment reduced locomotor activity in most, but not all BXD strains. Heritability (proportion of phenotypic variability attributed to genetic differences) was 0. 58 for the paraoxon treatment effect. Difference scores (strain mean for vehicle activity minus strain mean for paraoxon activity), and percent change in activity of paraoxon-treated mice compared to vehicle-treated mice were calculated for each BXD strain. QTL analyses using activity difference scores and percentage change in activity were conducted using a database with over 1300 unique genetic markers. Several provisional QTL found on different chromosomes were associated with the activity phenotype. Of these, several markers attained p<0.01 or greater. These were as follows: Chr 1: Ly9, p<0.006; Chr 6: D6Ncvs44, p<0.0005; Chr 9: D9Mit15, p<0. 003; Chr 11: D11Ncvs76, p<0.002; Chr 15: Tstap198, p<0.008. In addition, several markers on chromosome 3 approached p<0.01. Identified genes found near these regions include two plasma carboxylesterase alleles on chromosomes 6 and 9, a glutamate receptor subtype on chromosome 11 and a glycine receptor subunit on chromosome 11, raising the possibility that these genes could be the basis for these provisional QTLs. Risinger FO, Quick E, Belknap JK Quantitative trait loci for acute behavioral sensitivity to paraoxon Neurotoxicol Teratol 22(5) 667-674 Sep-Oct 2000 http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=11106859&dopt=Abstract 11106859 18 7 wks 49 Male 3-10 activity counts/min 40.0 4.21 40.8 5.08 43.6 10.1 26.0 8.23 23.7 7.79 37.4 6.27 32.4 3.17 30.4 4.23 31.0 4.55 22.3 5.91 39.5 5.11 24.7 2.64 21.4 2.15 26.4 5.25 26.1 5.58 32.9 2.70 18.2 4.13 32.7 4.33 25.3 3.31 18.3 4.17 38.4 8.37 24.6 5.87 29.7 4.22 35.7 5.12 7/13/2003 MK Sullivan MK Sullivan 11106859.18