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Journal of Clinical Endocrinology & Metabolism, Vol 58, 819-825, Copyright © 1984 by Endocrine Society

ARTICLES

Androgen metabolism by human fetal epiphyseal cartilage and its chondrocytes in primary culture

L Audi, A Carrascosa and A Ballabriga

Androgen metabolism by human epiphyseal cartilage and chondrocytes in primary culture was studied during fetal life. Testosterone (T) and androstendione (delta 4) were incubated with epiphyseal cartilage and with chondrocytes in Dulbecco's medium for 4, 12, and 24 h. Androstanedione, delta 4, dihydrotestosterone (DHT), and androstanediol were separated by bidimensional thin layer chromatography and delta 4, DHT, and T recrystallized in five different solvent systems. The results showed that delta 4 was transformed into androstanedione, DHT, and T whereas T was metabolized into delta 4 and 5 alpha-reduced androgens. In both systems (epiphyseal cartilage and chondrocytes) delta 4 was the principal metabolite produced from T. There were no major differences in the metabolic patterns of delta 4 and T between epiphyseal cartilage and chondrocytes according to sex nor gestational age (11-32 weeks). In conclusion, 5 alpha-reductase activity was found in chondrocytes from human fetuses of both sexes, but T was mainly transformed into delta 4.


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D. Vanderschueren, L. Vandenput, S. Boonen, M. K. Lindberg, R. Bouillon, and C. Ohlsson
Androgens and Bone
Endocr. Rev., June 1, 2004; 25(3): 389 - 425.
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