The effect of a series of β-adrenoceptor antagonists on cholesterol biosynthesis was studied in vitro in normal human skin fibroblasts. Some, but not all, of the drugs studied stimulated the incorporation of [2-14C]-acetate into cell sterols in a dose-dependent manner. This effect was unrelated to β-blocking potency, selectivity for β1 or β2 adrenoceptors and partial agonistic activity of the drugs, thus ruling out a β-receptor mediated mechanism. A positive, statistically significant correlation was found, however, between the drug lipophilicity and the stimulation of sterol biosynthesis. Propranolol, the most effective agent in increasing [2-14C]-acetate incorporation into cellular sterols, also enhanced the conversion of 3-hydroxy-3-methylglutaryl CoA (HMGCoA) into mevalonic acid, suggesting an interference of lipophilic β-adrenoceptor antagonists with HMHCoA-reductase, the feed-back regulated rate limiting step of cholesterol biosynthesis.
|Titolo:||LIPOPHILIC BETA-ADRENOCEPTOR ANTAGONISTS STIMULATE CHOLESTEROL-BIOSYNTHESIS IN HUMAN-SKIN FIBROBLASTS|
CORSINI, ALBERTO (Primo)
|Settore Scientifico Disciplinare:||Settore BIO/10 - Biochimica|
Settore BIO/14 - Farmacologia
|Data di pubblicazione:||1987|
|Digital Object Identifier (DOI):||10.1016/0006-2952(87)90486-2|
|Appare nelle tipologie:||01 - Articolo su periodico|