Flutamide blocks the self-priming effect of luteinizing hormone-releasing hormone in pubertal male rats.
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.
Department of Physiology and Biophysics, College of Medicine, University of South Florida, Tampa 33612.
S J
SJ
Nazian
D000813:Anilides / Q000494:pharmacology*; D000818:Animals; D005485:Flutamide / Q000494:pharmacology*; D007987:Gonadotropin-Releasing Hormone / Q000494:pharmacology*; D007986:Luteinizing Hormone / Q000378:metabolism; D008297:Male; D009919:Orchiectomy; D009929:Organ Size / Q000187:drug effects; D011467:Prostate / Q000187:drug effects; D051381:Rats; D011919:Rats, Inbred Strains; D011944:Receptors, Androgen / Q000502:physiology; D013739:Testosterone / Q000494:pharmacology
D000813:Anilides; D011944:Receptors, Androgen; D007987:Gonadotropin-Releasing Hormone; D013739:Testosterone; D005485:Flutamide; D007986:Luteinizing Hormone