DESCRIPTION:
DBA/2J males and females (n = 24/sex) were orally dosed with 4 g/kg ethanol (25% w/v in water by gavage) or water intermittently (2 days on/2 days off) on PND 29, 30, 33, 34, 37, 38, 41, and 42. Tissue was collected for gene expression studies at PND 43 (n = 22) and PND 66 (n = 19). Behaviorally naïve tissue from the PFC was collected 24 h (at PND 43) and 3 weeks (at PND 66) after the last ethanol binge (dose). Total RNA was analyzed for gene-level expression differences using Mouse Transcriptome Arrays v1.0. Two complementary analyses were conducted to interrogate differential gene expression at each age. Gene Ontology over-representation analysis identified six categories involved in oligodendrocyte development and myelination as the primary Biological Processes altered by adolescent binge ethanol. For transcript IDs significant for the interaction between sex and adolescent treatment, Gene Ontology analysis only identified two over-represented cellular components: ER chaperone component and smooth ER. When comparing gene expression between adolescent males vs. females, most of the differentially expressed genes either resided on the Y chromosome (Ddx3y, Eif2s3y, Kdm5d, Uty), or are known to escape X-inactivation (Ddx3x, Eif2s3x, Kdm5c, Kdm6a) in mice (Yang et al., 2010). Over-represented Gene Ontology categories (Supplementary Table 2) reflect their processes, such as histone demethylase activity, angiotensin catabolic processes in blood, cell adhesion and regulation of gap junction assembly. Genes in this geneset are all significantly altered as a main effect of treatment, sex, or the interaction between treatment and sex (p < 0.01).
LABEL:
DEG PFC in adolescent D2 mice 24hr post treatment M v F_pvalue
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P-Value
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