A mutation in the human canalicular multispecific organic anion transporter gene causes the Dubin-Johnson syndrome

Coen C. Paulusma, Marcel Kool, Piter J. Bosma, George L. Scheffer, Frank Ter Borg, Rik J. Scheper, Guido N.J. Tytgat, Piet Borst, Frank Baas, Ronald P.J. Oude Elferink

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516 Citations (Scopus)

Abstract

The human Dubin-Johnson syndrome (DJS) is a rare autosomal recessive liver disorder characterized by chronic conjugated hyperbilirubinemia. Patients have impaired hepatobiliary transport of non-bile salt organic anions. A highly similar phenotype has been described for a mutant Wistar rat strain, the transport-deficient (TR) rat, which is defective in the canalicular multispecific organic anion transporter (cmoat). This protein mediates adenosine triphosphate-dependent transport of a broad range of endogenous and xenobiotic compounds across the (apical) canalicular membrane of the hepatocyte. The complementary DNA (cDNA) encoding rat cmoat has recently been cloned, and the mutation underlying the defect in TR rats has been identified. In the present study, we have isolated the human homologue of rat cmoat, human cMOAT, and analyzed the corresponding cDNA from fibroblasts of a DJS patient for mutations. Our results show that a mutation in this gene is the cause of DJS.

Original languageEnglish
Pages (from-to)1539-1542
Number of pages4
JournalHepatology
Volume25
Issue number6
DOIs
Publication statusPublished - 1997
Externally publishedYes

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