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Korean J Hepatol > Volume 12(1); 2006 > Article
The Korean Journal of Hepatology 2006;12(1): 5-15.
Role of PXR and CAR in Cholestasis
Jeong Ill Suh
Department of Internal Medicine, College of Medicine, Dongguk University, Gyeongju, Korea
Cholestatic liver diseases are characterized by impairments of bile flows and accumulations of biliary constituents such as bile acids and bilirubin. The changes of phase I and II metabolism and the hepatobiliary transport system minimize cholestatic liver injury. These adaptive responses are transcriptionally regulated by several nuclear receptors. Recent studies have revealed that the pregnane X receptor (PXR) and the constitutive androstane receptor (CAR) are key nuclear receptors for regulating many of the adaptive responses noted in cholestasis. PXR and CAR coordinately regulate not only bile acid metabolism and transport, but also bilirubin clearance. PXR and CAR ligands may be useful in the future for the treatment of cholestatic liver disease. (Korean J Hepatol 2006;12:5-15)
KeyWords: Cholestasis, PXR, CAR
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