title: Increased testicular 5 alpha-androstane-3 alpha, 17 beta-diol formation induced by treatment with [D-Ser (TBU) 6, des-Gly-NH2(10)] LHRH ethylamide in the rat.
abstract: While the intact male adult rats respond to LH with a predominant increase of testicular and plasma testosterone levels, the response to LH stimulation in animals treated with the LHRH agonist, [D-Ser(TBU) 6, des-Gly-NH2(10)] LHRH ethylamide is characterized by a major production of 5 alpha-androstane-3 alpha, 17 beta-diol. The marked increase of 5 alpha-androstane-3 alpha, 17 beta-diol levels in the presence of a 90% decrease of testosterone concentration strongly suggests that 5 alpha-reductase and 3 alpha-hydroxysteroid oxidoreductase activities are increased during testicular desensitization induced by treatment with the LHRH agonist.
mesh_terms: D015096:3-Hydroxysteroid Dehydrogenases / Q000494:pharmacology*; D013741:3-Oxo-5-alpha-Steroid 4-Dehydrogenase / Q000378:metabolism; D045002:3-alpha-Hydroxysteroid Dehydrogenase (B-Specific); D015113:Androstane-3,17-diol / Q000096:biosynthesis*; D000732:Androstanols / Q000096:biosynthesis*; D000818:Animals; D002064:Buserelin; D013196:Dihydrotestosterone / Q000378:metabolism; D007987:Gonadotropin-Releasing Hormone / Q000031:analogs & derivatives* / Q000494:pharmacology; D007986:Luteinizing Hormone / Q000494:pharmacology; D008297:Male; D051381:Rats; D011956:Receptors, Cell Surface / Q000187:drug effects; D013737:Testis / Q000187:drug effects* / Q000378:metabolism; D013739:Testosterone / Q000378:metabolism
chemical_list: D000732:Androstanols; D011956:Receptors, Cell Surface; D013196:Dihydrotestosterone; D015113:Androstane-3,17-diol; D007987:Gonadotropin-Releasing Hormone; D013739:Testosterone; D007986:Luteinizing Hormone; D015096:3-Hydroxysteroid Dehydrogenases; D045002:3-alpha-Hydroxysteroid Dehydrogenase (B-Specific); D013741:3-Oxo-5-alpha-Steroid 4-Dehydrogenase; D002064:Buserelin