Abstract

The metabolism in vitro of 4 androgens, namely testosterone, androstenedione, 5α-dihydrotestosterone and 3α-androstanediol has been studied in male and female rat anterior pituitary cells in primary culture. When testosterone was used as precursor, androstenedione, 5a-dihydrotestosterone and 3α-androstanediol were the main metabolites whereas androstenedione was mainly converted into testosterone, 5α-androstanedione, 5α-dihydrotestosterone and androsterone. Studies on the metabolism of 5α-dihydrotestosterone and 3α-androstanediol showed that these compounds were easily interconverted and were also significantly metabolized to 5α-androstanedione and androsterone. No aromatized compounds could be detected suggesting that androgen action in the pituitary cell occurs directly via the androgen receptor rather than through prior conversion into estrogens.

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