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- W2055498921 abstract "BACKGROUND The purpose of this study was to determine the effects of a nonsteroidal C17–20 lyase inhibitor, 2-(1H-imidazol-4-ylmethyl)-9H-carbazole (YM116), on serum concentrations of androgens and ventral prostatic weight in rats. METHODS Serum concentrations of testosterone and of dehydroepiandrosterone sulfate and prostatic weights were measured in rats treated with YM116. RESULTS YM116 inhibited testicular C17–20 lyase competitively (Ki, 0.38 nM), and decreased the serum testosterone concentration in gonadotropin-releasing hormone-treated rats (ED50, 0.7 mg/kg), indicating that YM116 was about 21–24 times more potent than other C17–20 lyase inhibitors such as ketoconazole and liarozole, and was twice as potent as CB7630. YM116 also reduced dehydroepiandrosterone sulfate levels in ACTH-treated castrated rats (ED50, 11 mg/kg). YM116 (40 mg/kg, p.o., for 2 weeks) was almost comparable to bilateral orchiectomy with respect to the time course and magnitude of the reduction in prostatic weight. Each of these two treatments decreased the prostatic weight 3 days following the treatment. Contrarily, leuprolide transiently increased the prostatic weight and then decreased it. YM116 (100 mg/kg) had no effect on the serum cortisol level in guinea pigs, and slightly decreased the serum aldosterone level in rats. CONCLUSIONS YM116 is a selective C17–20 lyase inhibitor which decreases rat prostatic weight by reducing androgen production in the testes and adrenal glands. Prostate 37:10–18, 1998. © 1998 Wiley-Liss, Inc." @default.
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- W2055498921 date "1998-09-15" @default.
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- W2055498921 title "Novel nonsteroidal inhibitor of cytochrome P45017α (17α-hydroxylase/C17–20 lyase), YM116, decreased prostatic weights by reducing serum concentrations of testosterone and adrenal androgens in rats" @default.
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- W2055498921 doi "https://doi.org/10.1002/(sici)1097-0045(19980915)37:1<10::aid-pros3>3.0.co;2-c" @default.
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