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Virilization of the urogenital sinus of the tammar wallaby is not unique to 5alpha-androstane-3alpha,17beta-diol.

The androgen 5alpha-androstane-3alpha,17beta-diol (5alpha-adiol) is synthesized in testes and secreted into plasma of male tammar wallaby pouch young and appears to virilize the urogenital sinus. To provide insight into its mechanism of action, a dose response study showed that administration of 1 microg 5alpha-adiol monoenanthate per g body wt. per week for 3 weeks to 24-day-old female pouch young induced prostate bud formation equivalent to that of males of the same age. Administration of this same dose of the enanthates of testosterone, dihydrotestosterone, and 5alpha-adiol to female pouch young caused equivalent virilization of the urogenital sinus. The fact that 5alpha-adiol does not exert a unique effect, together with our earlier findings in this species that 5alpha-adiol and testosterone are converted to dihydrotestosterone in the urogenital sinus and that virilization of the urogenital sinus is prevented by the androgen receptor antagonist flutamide, suggest that 5alpha-adiol is a circulating precursor for dihydrotestosterone formation in this tissue.[1]

References

  1. Virilization of the urogenital sinus of the tammar wallaby is not unique to 5alpha-androstane-3alpha,17beta-diol. Leihy, M.W., Shaw, G., Wilson, J.D., Renfree, M.B. Mol. Cell. Endocrinol. (2001) [Pubmed]
 
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