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  • Title: Prostaglandins and sex steroids from corpora lutea of pregnant mares. In vitro studies.
    Author: Gobbetti A, Zerani M, Vannucci F, Marini R.
    Journal: Prostaglandins; 1994 Oct; 48(4):262-72. PubMed ID: 7878194.
    Abstract:
    To delineate endocrine mechanisms regulating equine luteal function and the possible functional differences between one month and three month corpora lutea of pregnancy (CL), the in vitro basal releases of prostaglandin F (PGF), prostaglandin E2 (PGE2), progesterone, and 17 beta-estradiol by one and three month CL of pregnant mares were evaluated. In addition, the in vitro effects of PGF2 alpha PGE2, progesterone and 17 beta-estradiol on synthesis of prostaglandins (PGs) and sex steroids were studied. PGF, PGE2, and 17 beta-estradiol secretion was higher in one month than in three month CL, while progesterone was secreted similarly by both types of CL. PGE2 treatment decreased 17 beta-estradiol in one month CL; progesterone increased PGE2 in one and three month CL; 17 beta-estradiol increased PGE2 in one month CL. This study suggests that, in one month CL, PGE2 production could be regulated by progesterone and 17 beta-estradiol, while, in three month CL, this prostaglandin seems to be under the control of progesterone alone.
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