Abstract
Treatment of rats with methylandrostenediol (MAD), an anabolic androgen, caused a profound reduction (65%) in the level of cytochrome P-450 11 β in rat adrenocortical mitochondria as measured by immunoblots using a specific antibody. The decreases in mitochondrial cytochrome P-450 scc (15%) and adrenodoxin (20%) were much less than that observed for cytochrome P-450 11 β . A 35% decrease in adrenal microsomal cytochrome P-450 21 and NADPH-cytochrome P-450 reductase levels was brought about by the treatment with MAD. The data establish that the preferential decrease in adrenal steroid 11β-hydroxylase activity associated with androgen treatment results from a decrease in cytochrome P-450 11 β . This is consistent with the role of 11-deoxycorticosterone in the pathogenesis of androgen-induced hypertension in rats.
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