Abstract
The activity of fatty acyl CoA synthetase and fatty acyl CoA:cholesterol acyl-transferase was determined in microsomal fractions from normal and atherosclerotic rabbit aortic tissue. No change in fatty acyl CoA synthetase activity was observed as a result of cholesterol feeding in contrast to the several-fold increase in the activity of fatty acyl CoA:cholesterol acyltransferase seen in atherosclerotic tissue. Inhibition of both enzymes was observed when clofibrate, or the tetrahydronapthyl analog of this drug were added in vitro. The inhibitory effects were most pronounced on the fatty acyl CoA:cholesterol acyltransferase.
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