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Prolactin Control of Receptor for Estradiol in Corpora Lutea of Pregnant Rats

  • G. Gibori
  • J. S. Richards
  • P. L. Keyes
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 112)

Abstract

Both prolactin and a prolactin-like hormone from the placenta, rat placental lactogen, appear to be required for the luteotropic effect of estrogen in corpora lutea of pregnant rats (1–3). However, the specific synergistic role of these two hormones with estrogen has not been defined. Because receptors for both estradiol and prolactin have been identified and characterized in corpora lutea of pregnant rats, the luteotropic effects of these two hormones are presumed to be direct (4,5). The following studies were designed to determine if the synergistic role of prolactin in maintaining luteal cell progesterone production might involve, at least in part, maintenance of luteal cell receptors for estradiol. To examine the roles of pituitary and placental hormones during early pregnancy two approaches were taken. In the first, pituitary prolactin surges (6) were selectively inhibited by the administration of 2-bromo-α-ergocryptine (ECO; CB-154; 7–10). In the second, both the pituitary and placenta were surgically removed.

Keywords

Corpus Luteum Luteal Cell Serum Progesterone Estradiol Receptor Cytosolic Receptor 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1979

Authors and Affiliations

  • G. Gibori
    • 1
    • 2
  • J. S. Richards
    • 1
    • 2
  • P. L. Keyes
    • 1
    • 2
  1. 1.Dept. Physiol.Univ. IllinoisChicagoUSA
  2. 2.Repro. Endo. Prog.Univ. Mich.Ann ArborUSA

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