X-linked cholestasis in mouse due to mutations of the P4-ATPase ATP11C

Owen M. Siggs, Bernd Schnabl, Bill Webb, Bruce Beutler

Research output: Contribution to journalArticle

41 Scopus citations

Abstract

Transporters at the hepatic canalicular membrane are essential for the formation of bile and the prevention of cholestatic liver disease. One such example is ATP8B1, a P4-type ATPase disrupted in three inherited forms of intrahepatic cholestasis. Mutation of the X-linked mouse gene Atp11c, which encodes a paralogous P4-type ATPase, precludes B-cell development in the adult bone marrow, but also causes hyperbilirubinemia. Here we explore this hyperbilirubinemia in two independent Atp11c mutant mouse lines, and find that it originates from an effect on nonhematopoietic cells. Liver function tests and histology revealed only minor pathology, although cholic acid was elevated in the serum of mutant mice, and became toxic to mutant mice when given as a dietary supplement. The majority of homozygous mutant females also died of dystocia in a maternal genotype-specific manner. ATP11C therefore represents a multifunctional transporter, essential for adult B-cell development, the prevention of intrahepatic cholestasis, and parturition, and is a new candidate for genetically undiagnosed cases of cholestasis and dystocia in humans.

Original languageEnglish (US)
Pages (from-to)7890-7895
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume108
Issue number19
DOIs
StatePublished - May 10 2011

Keywords

  • Bile acid
  • Enterohepatic circulation
  • Gallbladder
  • Jaundice
  • Uterus

ASJC Scopus subject areas

  • General

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