Steroids p. 419 - 430 (1982)
Update date:2022-08-11
Topics:
Moon
Duleba
In eight separate experiments, theca and granulosa were isolated from human follicles (5-25 mm in diameter) , and their capacities to metabolize radiolabelled testosterone in 24 hour cultures were assessed. Theca metabolized testosterone primarily to androstenedione, however significant aromatization to estradiol-17β and to estrone was also observed. Granulosa metabolized testosterone primarily to estradiol-17β and estrone, while smaller quantities were converted to androstenedione. In seven of these experiments, the intermediate of aromatization, 19-hydroxytestosterone, was identified. In six of these experiments, theca, when compared to granulosa, produced more androstenedione but less estradiol-17β and estrone. 5α-Reduced androgens were non-detectable or produced in small quantities. In a single experiment, metabolism of androstenedione was compared to metabolism of testosterone by both theca and granulosa. Theca metabolized androstenedione to testosterone in smaller quantities than testosterone to androstenedione. Granulosa metabolized androstenedione to testosterone in higher quantities than testosterone to androstenedione. Both theca and granulosa aromatized androstenedione more readily than testosterone.
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