Effects of high-dose ketoconazole treatment on adrenal mineralocorticoid biosynthesis in dogs and rats.
ACTA ENDOCRINOLOGICA 1987;
115:423-31. [PMID:
3303788 DOI:
10.1530/acta.0.1150423]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
At high doses, ketoconazole blocks both testicular and adrenal androgen biosyntheses and partially inhibits the glucocorticoid production. To investigate the effects of this imidazole derivative on the mineralocorticoid biosynthesis, 7 male mongrel dogs received a single oral dose of 15 mg/kg of ketoconazole or placebo, in a cross-over way. From 2 to 4 h after treatment, an iv infusion of angiotensin II (10 ng/kg per min) was performed. Ketoconazole treatment significantly blunted the aldosterone and cortisol increment, whereas 18-hydroxycorticosterone, corticosterone, 11-deoxycorticosterone (DOC), progesterone, and 17 alpha-hydroxyprogesterone rose to peak concentrations, respectively 2.5-, 6-, 8-, 2.5- and 1.5-fold higher than those observed after placebo administration. Plasma 11-deoxycortisol and renin activity levels remained similar in both groups. On the other hand, 2 X 2 groups of 10 male adult rats each were fed with a normal or a sodium-depleted diet. Of the two sets of groups, one was treated ip with ketoconazole (20 mg/kg twice a day), the other with vehicle solution. In animals on either diet, ketoconazole lowered 18-hydroxycorticosterone and aldosterone concentrations. Plasma DOC rose up to 25-fold in the salt-deprived animals. Serum Na+, Cl-, corticosterone and plasma renin activity remained unaffected by the treatment. These results show that high-dose ketoconazole treatment partially inhibits the biosynthesis of aldosterone by affecting the cytochrome P-45011 beta.(ABSTRACT TRUNCATED AT 250 WORDS)
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