Open AccessEffects of F-1394, an Acyl-CoA:Cholesterol Acyltransferase (ACAT) Inhibitor, on ACAT Activity in HepG2 Cells and on Hepatic Secretion of Lipids in Triton WR-1339-Induced Hyperlipidemic Rats: Possible Role of Hepatic ACAT in Very Low Density Lipoprotein Secretion
Author(s) -
Katsumi Aragane,
Jun Kusunoki,
Tetsuya Kitamine,
Tetsuaki Yamaura,
Haruo Ohnishi
Publication year - 1998
Publication title -
japanese journal of pharmacology/japanese journal of pharmacology
Language(s) - English
Resource type - Journals
eISSN - 1347-3506
pISSN - 0021-5198
DOI - 10.1254/jjp.76.309
Subject(s) - sterol o acyltransferase , secretion , chemistry , endocrinology , cholesterol , medicine , biology , biochemistry , lipoprotein
We examined the inhibitory potency of F-1394 ((1S,2S)-2-[3-(2,2-dimethylpropyl)-3-nonylureido]cyclohexane -1-yl 3-[(4R)-N-(2,2,5,5-tetramethyl-1,3-dioxane-4-carbonyl)amino]propionate), an acyl-CoA:cholesterol acyltransferase (ACAT) inhibitor, on ACAT activity and its hypolipidemic effect. F-1394 inhibited whole-cell ACAT activity in HepG2 cells with an IC50 value of 42 nM. The potency of F-1394 was greater than that of the five other ACAT inhibitors tested (YM-17E, CI-976, 57-118, CL-277,082 and DL-melinamide). In rats made hyperlipidemic by Triton WR-1339, F-1394 caused a reduction in the hepatic secretion rate of cholesterol. These data suggest that inhibition of hepatic ACAT activity helps to reduce very low density lipoprotein secretion from the liver into the circulation.