Phenotypic and gene expression features associated with variation in chronic ethanol consumption in heterogeneous stock collaborative cross mice

Robert Hitzemann, Tamara J. Phillips, Denesa R. Lockwood, Priscila Darakjian, Robert P. Searles

Research output: Contribution to journalArticle

Abstract

Of the more than 100 studies that have examined relationships between excessive ethanol consumption and the brain transcriptome, few rodent studies have examined chronic consumption. Heterogeneous stock collaborative cross mice freely consumed ethanol vs. water for 3 months. Transcriptional differences were examined for the central nucleus of the amygdala, a brain region known to impact ethanol preference. Early preference was modestly predictive of final preference and there was significant escalation of preference in females only. Genes significantly correlated with female preference were enriched in annotations for the primary cilium and extracellular matrix. A single module in the gene co-expression network was enriched in genes with an astrocyte annotation. The key hub node was the master regulator, orthodenticle homeobox 2 (Otx2). These data support an important role for the extracellular matrix, primary cilium and astrocytes in ethanol preference and consumption differences among individual female mice of a genetically diverse population.

Original languageEnglish (US)
Pages (from-to)4516-4524
Number of pages9
JournalGenomics
Volume112
Issue number6
DOIs
StatePublished - Nov 2020

Keywords

  • Addiction
  • Alcohol
  • Drinking
  • Ethanol preference
  • RNA-Seq
  • Sex differences

ASJC Scopus subject areas

  • Genetics

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