Microarray analysis of hepatic gene expression in gallstone-susceptible and gallstone-resistant mice

Patricia A. Dyck, Farzana Hoda, Elizabeth S. Osmer, Richard M. Green*

*Corresponding author for this work

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Cholesterol gallstone disease affects 40 million Americans, and evidence indicates that there is a genetic component to human gallstone disease. In a mouse model of gallstone formation, where mice are fed a lithogenic diet, QTL analysis has been employed to identify the Lith 1 locus on Chromosome (Chr) 2. In order to identify genes in which the difference in expression is independent of factors other than strain-specific genotype, we employed micro-array analysis of hepatic gene expression in gall-stone-susceptible (C57L/J) and gallstone-resistant (AKR/J) mice. We observed 57 genes with consistent differential expression between C57L/J and AKR/J mice, including many cytochrome, antioxidant, and lipid peroxidation genes. Analysis of differentially expressed genes identified numerous genes involved in fatty acid metabolism. Northern analysis of selected lipid metabolic genes further confirmed the strain-specific differential expression. Literature searches of common regulatory elements within antioxidant systems identified the nuclear transcription factor Nrf2, which maps to the Lith 1 loci. Hepatic Nrf2 gene and protein expression is also increased in strain AKR/J, compared with C57L/J mice, identifying Nrf2 as a putative Lith 1 gallstone gene. These data indicate that microarray analysis may complement QTL analysis to identify systems of regulation and genotypic differences responsible for polygenic diseases.

Original languageEnglish (US)
Pages (from-to)601-610
Number of pages10
JournalMammalian Genome
Volume14
Issue number9
DOIs
StatePublished - Sep 1 2003

ASJC Scopus subject areas

  • Genetics

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