담낭상피세포에 있어서 역콜레스테롤 수송

Bile is the major route of cholesterol excretion from the body. It is concentrated in the gallbladder, and often results in supersaturation of cholesterol. The high levels of cholesterol in gallbladder bile has clinical implications with respect to cholesterol gallstone formation and cholesterolosis...

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Bibliographic Details
Published inThe Korean journal of gastroenterology Vol. 43; no. 3; pp. 145 - 152
Main Authors 이진, Lee Jin, 최호순, Choe Ho Sun
Format Journal Article
LanguageKorean
Published 대한소화기학회 15.03.2004
Subjects
ABCA1
Cholesterol
Gallbladder epithelial cell
LXR
RXR
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Summary:Bile is the major route of cholesterol excretion from the body. It is concentrated in the gallbladder, and often results in supersaturation of cholesterol. The high levels of cholesterol in gallbladder bile has clinical implications with respect to cholesterol gallstone formation and cholesterolosis of the gallbladder wall. Gallbladder epithelial cells (GBEC) are exposed to high cholesterol concentrations on their apical surfaces. Therefore, GBEC are uniquely positioned to play an important role in modulating biliary cholesterol concentrations. Recently, it has been documented that the key-transporter for polarized cholesterol and phospholipid efflux in GBEC is ATP-binding cassette transporter A1 (ABCA1) and Liver X receptor (LXR) and retinoid X receptor (RXR) in the nucleus of GBEC have a role that regulates ABCA1 expression. In addition, GBEC synthesize apolipoprotein A-I and E as cholesterol acceptors. These results indicate that GBEC has a perfect system for reverse cholesterol transport. We introduce the roles and mechanisms of ABCA1, scavenger receptor class B-I, LXR and RXR related to reverse cholesterol transport in GBEC with a review of our study experience and related literature. (Korean J Gastroenterol 2004;43:145-152)
Bibliography:Korean Society of Gastroenterology
ISSN:1598-9992