Abstract
Castration of pubertal or young adult male rats eliminates the self-priming effect of luteinizing hormone-releasing hormone on luteinizing hormone secretion. Testosterone, dihydrotestosterone, or estradiol will maintain this effect in castrated animals. In order to explore the mechanism by which both dihydrotestosterone and estradiol are capable of maintaining the effect, intact rats as well as castrated animals implanted with testosterone capsules were treated with the antiandrogen Flutamide. In both intact animals and castrated rats bearing testosterone-filled Silastic capsules, Flutamide blocked the self-priming effect. These data suggest that the androgen receptor is of primary importance in the maintenance of the self-priming effect.
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