Neurotoxic consequences of chronic alcohol withdrawal

Expression profiling reveals importance of gender over withdrawal severity

Joel G. Hashimoto, Kristine Wiren

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

While women are more vulnerable than men to many of the medical consequences of alcohol abuse, the role of sex in the response to ethanol is controversial. Neuroadaptive responses that result in the hyperexcitability associated with withdrawal from chronic ethanol likely reflect gene expression changes. We have examined both genders for the effects of withdrawal on brain gene expression using mice with divergent withdrawal severity that have been selectively bred from a genetically heterogeneous population. A total of 295 genes were identified as ethanol regulated from each gender of each selected line by microarray analyses. Hierarchical cluster analysis of the arrays revealed that the transcriptional response correlated with sex rather than with the selected withdrawal phenotype. Consistent with this, gene ontology category over-representation analysis identified cell death and DNA/RNA binding as targeted classes of genes in females, while in males, protein degradation, and calcium ion binding pathways were more altered by alcohol. Examination of ethanol-regulated genes and these distinct signaling pathways suggested enhanced neurotoxicity in females. Histopathological analysis of brain damage following ethanol withdrawal confirmed elevated cell death in female but not male mice. The sexually dimorphic response was observed irrespective of withdrawal phenotype. Combined, these results indicate a fundamentally distinct neuroadaptive response in females compared to males during chronic ethanol withdrawal and are consistent with observations that female alcoholics may be more vulnerable than males to ethanol-induced brain damage associated with alcohol abuse.

Original languageEnglish (US)
Pages (from-to)1084-1096
Number of pages13
JournalNeuropsychopharmacology
Volume33
Issue number5
DOIs
StatePublished - Apr 2008

Fingerprint

Ethanol
Alcohols
Alcoholism
Brain
Cell Death
Genes
Phenotype
Gene Expression
Gene Ontology
Alcoholics
Microarray Analysis
Proteolysis
Cluster Analysis
RNA
Ions
Calcium
DNA
Population

Keywords

  • Alcoholism
  • Animal model
  • Microarray
  • Neurotoxicity

ASJC Scopus subject areas

  • Pharmacology

Cite this

Neurotoxic consequences of chronic alcohol withdrawal : Expression profiling reveals importance of gender over withdrawal severity. / Hashimoto, Joel G.; Wiren, Kristine.

In: Neuropsychopharmacology, Vol. 33, No. 5, 04.2008, p. 1084-1096.

Research output: Contribution to journalArticle

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