title: Effects of gonadectomy and steroid treatment on renal prostaglandin 9-ketoreductase activity in the rat.
abstract: The effect of gonadectomy and treatment with sex-steroids on renal prostaglandin 9-ketoreductase activity in 10-11 week old male and female rats was determined. Rats were gonadectomized or subjected to sham operation at 3 weeks of age. During week 7, rats were injected s.c. twice over a 6-day interval with vehicle (peanut oil, 0.5 ml X kg-1) or with depot forms of testosterone (5 mg X kg-1), estradiol (0.02 mg X kg-1), progesterone (5 mg X kg-1), or estradiol and progesterone combined. Renal prostaglandin 9-ketoreductase activity was about 50% higher in female rats than in males. Gonadectomy decreased 9-ketoreductase activity in females, but not in males, and eliminated the gender difference in enzyme activity. Treatment with estradiol elevated 9-ketoreductase activity in males and females, while treatment with testosterone or progesterone was without effect. Progesterone did, however, antagonize the elevation in 9-ketoreductase activity produced by estradiol.
mesh_terms: D000818:Animals; D004958:Estradiol / Q000494:pharmacology; D005260:Female; D012739:Gonadal Steroid Hormones / Q000494:pharmacology*; D006911:Hydroxyprostaglandin Dehydrogenases / Q000378:metabolism*; D007668:Kidney / Q000187:drug effects / Q000201:enzymology*; D008297:Male; D009919:Orchiectomy; D010052:Ovariectomy; D011374:Progesterone / Q000494:pharmacology; D051381:Rats; D011919:Rats, Inbred Strains; D012727:Sex Characteristics; D013739:Testosterone / Q000494:pharmacology
chemical_list: D012739:Gonadal Steroid Hormones; D013739:Testosterone; D011374:Progesterone; D004958:Estradiol; D006911:Hydroxyprostaglandin Dehydrogenases; C035858:prostaglandin-E2 9-reductase