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  • Title: Inhibition of estrogen-induced increases in uterine guanosine 3',5'-cyclic monophosphate levels by inhibitors of protein and RNA synthesis.
    Author: Nicol SE, Goldberg ND.
    Journal: Biochemistry; 1976 Dec 14; 15(25):5490-6. PubMed ID: 187218.
    Abstract:
    Uterine guanosine 3',5'-cyclic monophosphate (cyclic GMP) levels are elevated significantly from 2 to 12 h after a single injection of estradiol-17 beta or diethylstilbestrol to mature, ovariectomized, or immature rats. The accumulation of cyclic GMP is greater in endometrial- than myometrial-enriched uterine tissue. The estrogen-induced increase in cyclic GMP can be prevented by administration of the protein synthesis inhibitors, cycloheximide and puromycin, or by relatively large doses of the RNA synthesis inhibitor, actinomycin D, but not by the muscarinic antagonist, atropine. The requirement for a protein with a relatively rapid rate of turnover is suggested by the demonstration that cycloheximide, when administered after estrogen, can within a 3-h period restore the estrogen-elevated levels of cyclic GMP to those of the non-estrogen-treated tissue.
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