Abstract：
:We describe a 47-year-old patient who developed cholelithiasis in adolescence, followed by recurrent intrahepatic cholestasis of pregnancy, and finally biliary cirrhosis in adulthood. In our patient, the consecutive presentation of the 3 mentioned disorders raised the suspicion of a defect of MDR3, the canalicular protein involved in the transport of phospatidylcholine to bile. Mutational analysis in our patient showed a heterozygous missense mutation of the MDR3 gene that has not been described previously, which occurs in exon 14 at codon 535, and results in the substitution of glycine for aspartic acid. Further analysis of 7 members of the family showed the same mutation in her daughter who, on follow-up, developed cholestasis of pregnancy and persisting high serum levels of gamma-glutamyl transpeptidase and alkaline phosphatase after delivery. Although biliary cirrhosis associated with MDR3 deficiency typically appears before the age of 25 years, in our case, the relatively mild MDR3 dysfunction allowed for a slower progression of the disease with established, well-advanced cirrhosis in the fifth decade of life. The present case, which accumulates the 3 clinical disorders assocaited with MDR3 deficiency, shows that this condition should be suspected not only in children or young people with high gamma-glutamyl transpeptidase cholestasis but also in middle-aged or older patients with chronic idiopathic cholestasis, especially when there is a previous history of cholestasis of pregnancy or juvenile cholelithiasis.
journal_name
Gastroenterologyjournal_title
Gastroenterologyauthors
Lucena JF,Herrero JI,Quiroga J,Sangro B,Garcia-Foncillas J,Zabalegui N,Sola J,Herraiz M,Medina JF,Prieto Jdoi
10.1053/gast.2003.50144keywords:
subject
Has Abstractpub_date
2003-04-01 00:00:00pages
1037-42issue
4eissn
0016-5085issn
1528-0012pii
S0016508503000581journal_volume
124pub_type
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