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14 - Neurobiological regulation of hormonal response by progestin and estrogen receptors

Published online by Cambridge University Press:  15 October 2009

Paul E. Micevych
Affiliation:
University of California, Los Angeles
Ronald P. Hammer, Jr
Affiliation:
Tufts University, Massachusetts
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Summary

Introduction

Ovarian hormones have many cellular actions in the central nervous system that result in changes of behaviors and reproductive physiology (Blaustein and Olster 1989). One approach to unraveling the cellular processes by which ovarian hormones act on the brain has been the study of hormonal regulation of female sexual behavior. While the induction of such behavior usually requires stimulation by ovarian hormones, the specific hormonal conditions required for the stimulation and inhibition of sexual behavior vary in accord with the antecedent hormonal conditions in each species. These hormonal conditions include patterns as different as the sequential presence of estradiol and progesterone in rats and guinea pigs (Dempsey et al. 1936; Boling and Blandau 1939), the sequential presence of progesterone and estradiol in sheep (Robinson 1954), the presence of estradiol alone in prairie voles (Dluzen and Carter 1979), and the presence of testosterone metabolized neuronally to estradiol in musk shrews (Rissman 1991). We have studied the hormonal regulation of sexual behavior in rats and guinea pigs by the sequential presence of estradiol and progesterone. In ovariectomized guinea pigs injected with estradiol and progesterone, as during the estrous cycle, the period of sexual receptivity lasts for approximately 8 hours. While the specific cellular endpoints may vary in each of these species, the fundamental cellular processes by which hormones act are likely to be similar in all species.

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Publisher: Cambridge University Press
Print publication year: 1995

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