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The nature of the inhibition of cholesterol esterase by delta 1-tetrahydrocannabinol
Authors:T S Shoupe  S A Hunter  S H Burstein  C D Hubbard
Abstract:An improved assay for cholesterol esterase based on the use of fatty acid radiolabelled cholesterol esters has been developed. The method was used to demonstrate the effects of delta 1-tetrahydrocannabinol on a crude Leydig cell esterase preparation and on crystalline pancreatic esterase. Both enzymes were inhibited and the Km values determined (6.6 mumol/1 for the Leydig cell esterase and 6.25 mumol/1 for the pancreatic enzyme). While the former exhibited a mixed type of inhibition, the latter clearly was competitive.
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