Abstract：
BACKGROUND & AIMS:Alterations of hepatic cholesterol metabolism in patients with cholesterol gallstones are still controversial. This study investigated whether hepatic cholesterol metabolism is altered in Japanese patients with cholesterol gallstones. METHODS:In this systematic study of 24 middle-aged nonobese and nondiabetic Japanese patients who had cholesterol gallstones and were undergoing elective cholecystectomy, an analysis of three regulatory enzymes in the cholesterol metabolism, as well as cytosolic total and free cholesterol levels and sterol carrier protein 2/nonspecific lipid transfer protein (SCP2/nsLTP) levels, was conducted using liver biopsy samples obtained during surgery. RESULTS:The activities of 3-hydroxy-3-methyl-glutaryl-coenzyme A (HMG-CoA) reductase, cholesterol 7 alpha-hydroxylase, and acyl-CoA/cholesterol acyltransferase were not significantly different between patients and controls. Nevertheless, patients with gallstones showed tendencies for elevated HMG-CoA reductase activity and protein content and decreased cholesterol 7 alpha-hydroxylase activities. As anticipated, serum levels of 7 alpha-hydroxycholesterol and squalene paralleled these findings. The patients with gallstones also had significantly increased cytosolic total and free cholesterol levels (P < 0.001), which correlated strongly with increased cytosolic levels of SCP2/nsLTP (r = 0.80, P < 0.001 and r = 0.81, P < 0.001, respectively). CONCLUSIONS:The results suggest that intracellular cholesterol transport is enhanced in patients with cholesterol gallstones.
journal_name
Gastroenterologyjournal_title
Gastroenterologyauthors
Ito T,Kawata S,Imai Y,Kakimoto H,Trzaskos JM,Matsuzawa Ydoi
10.1053/gast.1996.v110.pm8613070subject
Has Abstractpub_date
1996-05-01 00:00:00pages
1619-27issue
5eissn
0016-5085issn
1528-0012pii
S0016508596002363journal_volume
110pub_type
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