Activation of the mesolimbic dopamine reward pathway by acute ethanol produces reinforcement and changes in gene expression that appear to be crucial to the molecular basis for adaptive behaviors and addiction. The inbred mouse strains DBA/2J and C57BL/6J exhibit contrasting acute behavioral responses to ethanol. We used oligonucleotide microarrays and bioinformatics methods to characterize patterns of gene expression in three brain regions of the mesolimbic reward pathway of these strains. Expression profiling included examination of both differences in gene expression 4 h after saline injection or acute ethanol (2 g/kg). Using a rigorous stepwise method for microarray analysis, we identified 788 genes differentially expressed in control DBA/2J versus C57BL/6J mice and 307 ethanol-regulated genes in the nucleus accumbens, prefrontal cortex, and ventral tegmental area. There were strikingly divergent patterns of ethanol-responsive gene expression in the two strains. Ethanol-responsive genes also showed clustering at discrete chromosomal regions, suggesting local chromatin effects in regulation. Ethanol-regulated genes were generally related to neuroplasticity, but regulation of discrete functional groups and pathways was brain region specific: glucocorticoid signaling, neurogenesis, and myelination in the prefrontal cortex; neuropeptide signaling and developmental genes, including factor Bdnf, in the nucleus accumbens; and retinoic acid signaling in the ventral tegmental area. Bioinformatics analysis identified several potential candidate genes for quantitative trait loci linked to ethanol behaviors, further supporting a role for expression profiling in identifying genes for complex traits. Brain region-specific changes in signaling and neuronal plasticity may be critical components in development of lasting ethanol behavioral phenotypes such as dependence, sensitization, and craving.
A list of the 307 genes found to be upregulated or downregulated by ethanol in PFC, VTA or NA of B6 or D2 mice. ID number represents cluster membership from Figure 4.
Authors:
Kerns RT, Ravindranathan A, Hassan S, Cage MP, York T, Sikela JM, Williams RW, Miles MF
Hippocampus Gene Expression Correlates for VONFREYTHRESHOLDMEAN measured in BXD RI Females obtained using GeneNetwork Hippocampus Consortium M430v2 (Jun06) RMA. The VONFREYTHRESHOLDMEAN measures Mechanical Sensitivity-Von Frey Threshold under the domain Pain. The correlates were thresholded at a p-value of less than 0.001.
Authors:
Philip VM, Duvvuru S, Gomero B, Ansah TA, Blaha CD, Cook MN, Hamre KM, Lariviere WR, Matthews DB, Mittleman G, Goldowitz D, Chesler EJ
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 by Phillips TJ , et al
Whole Brain Gene Expression Correlates for ACTI15_SAL measured in BXD RI Females obtained using INIA Brain mRNA M430 (Jun06) RMA. The ACTI15_SAL measures Distance traveled (cm) during the third five minute bin after saline under the domain Ethanol. The correlates were thresholded at a p-value of less than 0.001.
Authors:
Philip VM, Duvvuru S, Gomero B, Ansah TA, Blaha CD, Cook MN, Hamre KM, Lariviere WR, Matthews DB, Mittleman G, Goldowitz D, Chesler EJ
Whole Brain Gene Expression Correlates for NEPCOUNT30 measured in BXD RI Males obtained using INIA Brain mRNA M430 (Jun06) RMA. The NEPCOUNT30 measures Novel environment locomotion (activity beam breaks) 15-30 min in the periphery under the domain Morphine. The correlates were thresholded at a p-value of less than 0.001.
Whole Brain Gene Expression Correlates for NEPDIST30 measured in BXD RI Males obtained using INIA Brain mRNA M430 (Jun06) RMA. The NEPDIST30 measures Novel environment distance (cm) travelled min 15-30 under the domain Morphine. The correlates were thresholded at a p-value of less than 0.001.
Whole Brain Gene Expression Correlates for OF_DIST_10_15 measured in BXD RI Females obtained using INIA Brain mRNA M430 (Jun06) RMA. The OF_DIST_10_15 measures Open Field - Total distance traveled 10-15 minutes under the domain Basal Behavior. The correlates were thresholded at a p-value of less than 0.001.
Authors:
Philip VM, Duvvuru S, Gomero B, Ansah TA, Blaha CD, Cook MN, Hamre KM, Lariviere WR, Matthews DB, Mittleman G, Goldowitz D, Chesler EJ
Whole Brain Gene Expression Correlates for OF_DIST_10_15 measured in BXD RI Females obtained using INIA Brain mRNA M430 (Jun06) RMA. The OF_DIST_10_15 measures Open Field - Total distance traveled 10-15 minutes under the domain Basal Behavior. The correlates were thresholded at a p-value of less than 0.001.
Whole Brain Gene Expression Correlates for OF_DIST_5_10 measured in BXD RI Females obtained using INIA Brain mRNA M430 (Jun06) RMA. The OF_DIST_5_10 measures Open Field - Total distance traveled 5-10 minutes under the domain Basal Behavior. The correlates were thresholded at a p-value of less than 0.001.
Authors:
Philip VM, Duvvuru S, Gomero B, Ansah TA, Blaha CD, Cook MN, Hamre KM, Lariviere WR, Matthews DB, Mittleman G, Goldowitz D, Chesler EJ
Whole Brain Gene Expression Correlates for OF_DIST_5_10 measured in BXD RI Females obtained using INIA Brain mRNA M430 (Jun06) RMA. The OF_DIST_5_10 measures Open Field - Total distance traveled 5-10 minutes under the domain Basal Behavior. The correlates were thresholded at a p-value of less than 0.001.
Whole Brain Gene Expression Correlates for PNOVEL_ACOUNT_1 measured in BXD RI Males obtained using INIA Brain mRNA M430 (Jun06) RMA. The PNOVEL_ACOUNT_1 measures Novel Open Field - TOTAL locomotion (activity beam breaks) in the periphery under the domain Cocaine. The correlates were thresholded at a p-value of less than 0.001.
Authors:
Philip VM, Duvvuru S, Gomero B, Ansah TA, Blaha CD, Cook MN, Hamre KM, Lariviere WR, Matthews DB, Mittleman G, Goldowitz D, Chesler EJ
Striatum Gene Expression Correlates for ROTATRAIN_TIME measured in BXD RI Females & Males obtained using GeneNetwork Striatum M430V2 (Apr05) RMA. The ROTATRAIN_TIME measures Mean time on rotarod during training. under the domain Ethanol. The correlates were thresholded at a p-value of less than 0.001.
Authors:
Philip VM, Duvvuru S, Gomero B, Ansah TA, Blaha CD, Cook MN, Hamre KM, Lariviere WR, Matthews DB, Mittleman G, Goldowitz D, Chesler EJ
Cerebellum Gene Expression Correlates for HAND_4HOURS measured in BXD RI Females & Males obtained using SJUT Cerebellum mRNA M430 (Mar05) RMA. The HAND_4HOURS measures Handling induced convulsions 4 hrs after ethanol under the domain Ethanol HIC. The correlates were thresholded at a p-value of less than 0.001.
Authors:
Philip VM, Duvvuru S, Gomero B, Ansah TA, Blaha CD, Cook MN, Hamre KM, Lariviere WR, Matthews DB, Mittleman G, Goldowitz D, Chesler EJ
Whole Brain Gene Expression Correlates for NOVEL_ACOUNT_1 measured in BXD RI Males obtained using INIA Brain mRNA M430 (Jun06) RMA. The NOVEL_ACOUNT_1 measures Open Field InovelTOTAL locomotion (activity beam breaks) in the center under the domain Morphine. The correlates were thresholded at a p-value of less than 0.001.
Cerebellum Gene Expression Correlates for VOCA_THRESHOLD measured in BXD RI Females obtained using SJUT Cerebellum mRNA M430 (Mar05) RMA. The VOCA_THRESHOLD measures Vocalization Threshold - shock intensity (mA) under the domain Stress Vocalization. The correlates were thresholded at a p-value of less than 0.001.
Authors:
Philip VM, Duvvuru S, Gomero B, Ansah TA, Blaha CD, Cook MN, Hamre KM, Lariviere WR, Matthews DB, Mittleman G, Goldowitz D, Chesler EJ
QTL for nicotine sensitivity on Chr7 at D7Mit66 (116.91 Mbp , Build 37)
Description:
nicotine sensitivity spans 91.91 - 141.91 Mbp (NCBI Build 37) on Chr7. This interval was obtained by using an interval width of 25 Mbp around the peak marker (Build 37, MGI, http://informatics.jax.org).
QTL for alcohol preference locus on Chr7 at D7Mit105 (126.73 Mbp , Build 37)
Description:
alcohol preference locus spans 101.73 - 151.73 Mbp (NCBI Build 37) on Chr7. This interval was obtained by using an interval width of 25 Mbp around the peak marker (Build 37, MGI, http://informatics.jax.org).
alcohol preference locus 14, female specific at D7Mit105 with a LOD score of 1.84 (p < 0.004) spans and preference correlation of 0.591 101.73 - 151.73 Mbp (NCBI Build 37) on Chr7. This interval was obtained by using an interval width of 25 Mbp around the peak marker (Build 37, MGI, http://informatics.jax.org).
QTL for METH responses for home cage activity on Chr7 at D7Mit12 (129.57 Mbp , Build 37)
Description:
METH responses for home cage activity spans 104.57 - 154.57 Mbp (NCBI Build 37) on Chr7. This interval was obtained by using an interval width of 25 Mbp around the peak marker (Build 37, MGI, http://informatics.jax.org).
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