Role of the bile salt export pump, BSEP, in acquired forms of cholestasis.
Generation of bile is a key function of the liver. Its impairment leads to accumulation of cytotoxic bile salts in hepatocytes and, consequently, to liver disease. The bile salt export pump, BSEP, is critically involved in the secretion of bile salts into bile. Its function can be disturbed or abolished by inherited mutations. This will lead to progressive intrahepatic cholestais and severe liver disease. In addition to mutations, BSEP can be inhibited by acquired factors, such as xenobiotics or drugs, aberrant bile salt metabolites, or pregnancy. This inhibition will lead to acquired cholestasis. Some drugs are now known to be competitive inhibitors of Bsep. In addition, a polymorphism in the gene coding for BSEP has been identified as a potential susceptibility factor for acquired cholestasis.
Stieger
Bruno
B
Department of Medicine, University Hospital Zurich, Switzerland. bstieger@kpt.unizh.ch <bstieger@kpt.unizh.ch>
D000074020:ATP Binding Cassette Transporter, Subfamily B, Member 11; D018528:ATP-Binding Cassette Transporters / Q000037:antagonists & inhibitors / Q000235:genetics* / Q000378:metabolism* / Q000502:physiology; D000818:Animals; D001647:Bile Acids and Salts / Q000378:metabolism*; D002779:Cholestasis / Q000139:chemically induced / Q000235:genetics* / Q000378:metabolism*; D006801:Humans; D008107:Liver Diseases / Q000235:genetics / Q000378:metabolism; D009154:Mutation
C093491:ABCB11 protein, human; D000074020:ATP Binding Cassette Transporter, Subfamily B, Member 11; D018528:ATP-Binding Cassette Transporters; D001647:Bile Acids and Salts