Mice overexpressing hepatic Abcb11 rapidly develop cholesterol gallstones

Anne Henkel, Zhixin Wei, David E. Cohen, Richard M. Green*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Scopus citations

Abstract

Cholelithiasis is a polygenic disease, although the genes responsible for gallstone formation have not yet been clearly identified. QTL analysis has identified the Lith 1 loci on mouse Chromosome 1, and the hepatic bile salt transporter Abcb11 maps to the Lith 1 locus. We have used recently developed TTR-Abcb11 transgenic mice that overexpress Abcb11 to determine the effects of Abcb11 overexpression on cholesterol gallstone formation. TTR-Abcb11 and FVB/NJ strain control mice were fed a lithogenic or chow diet and cholesterol crystal and gallstone formation were measured. Biliary lipids in gallbladder bile and gene expression of canalicular lipid transporters were also analyzed. TTR-Abcb11 mice fed a lithogenic diet had an increased rate of cholesterol crystal and gallstone formation. This was associated with an increase in both the hydrophobic bile salt and cholesterol content of gallbladder bile. Expression of Abcb4, Abcg5, and Abcg8 did not change before gallstone formation. These data indicate that hepatic overexpression of Abcb11 increases the rate of cholesterol gallstone formation. This is likely because of increases in bile salt hydrophobicity but not because of alterations of other biliary lipid transporters. These findings strongly support Abcb11 as a Lith 1 gene.

Original languageEnglish (US)
Pages (from-to)903-908
Number of pages6
JournalMammalian Genome
Volume16
Issue number12
DOIs
StatePublished - Dec 2005

ASJC Scopus subject areas

  • Genetics

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