Title : The suppressive effect of the catatoxic steroid, pregnenolone-16alpha-carbonitrile, on liver microsomal cholesterol-7alpha-hydroxlyase.

Pub. Date : 1978 Jun

PMID : 694973






3 Functional Relationships(s)
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1 The effect of the catatoxic steroid, 3beta-hydroxy-20-oxo-5-pregnene-16alpha-carbonitrile [pregnenolone-16alpha-carbonitrile (PCN)] on hepatic microsomal cholesterol-7alpha-hydroxylase, the probable rate-limiting enzyme of bile acide biosynthesis, has been studied. Pregnenolone Carbonitrile cytochrome P450 family 7 subfamily A member 1 Rattus norvegicus
2 Short term administration (3 days) of PCN in the diet of rats resulted in a significant decrease in the liver microsomal cholesterol-7alpha-hydroxylase activity, in contrast to a marked stimulation of microsomal cytochrome P-450 and ethylmorphine demethylase activity. Pregnenolone Carbonitrile cytochrome P450 family 7 subfamily A member 1 Rattus norvegicus
3 PCN significantly depressed the cholesterol-7alpha-hydroxylase activity in the livers of rats with elevated levels of the enzyme produced by cholestyramine feeding. Pregnenolone Carbonitrile cytochrome P450 family 7 subfamily A member 1 Rattus norvegicus