title: Effect of androstanediol sulfates on luteinizing hormone release in ovariectomized rats.
abstract: Androstanediols are the major products of the immature rat ovary and are present in peripheral circulation mainly as sulfate conjugates. In this paper we identified 5 alpha-androstane-3 beta, 17 beta-diol-3-monosulfate (3 beta-A-MS) as one of the forms found in blood and subsequently synthesized and administered it to ovariectomized rats at a dose of 100 microgram/100 g BW . day from 21-45 days of age. This dose effectively inhibits postcastrational LH elevation. Other androstanediols examined, like 5 alpha-A-3 alpha, 17 beta-diol-disulfate, 5 alpha-A-3 beta, 17 beta-diol-disulfate, and the free 5 alpha-A-3 beta, 17 beta-diol do not exert such an effect on LH release. The MCR of 3 beta-A-MS was 441 +/- 64 ml/h, independent of the infusion rate between 0.15-15.0 microgram/h, and its production rate was calculated to be 37 microgram/day at the age of 30 days. The quantitative relations of the steroid level in serum to its capacity to inhibit LH release was studied using Silastic capsules. A steady concentration of 1.1 ng 3 beta-A-MS/ml serum inhibits postcastrational LH release in the immature female rat. Since a similar or higher concentration of the steroid is present in the intact rat, it is assumed that 3 beta-A-MS controls pituitary LH release in the intact immature female rat. (Endocrinology 108: 500, 1981)
mesh_terms: D015113:Androstane-3,17-diol / Q000031:analogs & derivatives / Q000378:metabolism / Q000494:pharmacology*; D000732:Androstanols / Q000494:pharmacology*; D000818:Animals; D002369:Castration; D003864:Depression, Chemical; D004305:Dose-Response Relationship, Drug; D005246:Feedback; D005260:Female; D007986:Luteinizing Hormone / Q000378:metabolism*; D051381:Rats; D012741:Sexual Maturation
chemical_list: D000732:Androstanols; D015113:Androstane-3,17-diol; D007986:Luteinizing Hormone