PMID: 3747517Jul 1, 1986Paper

Endogenous progesterone and lordosis behavior in male rats given estrogen alone

Journal of Steroid Biochemistry
C SchaefferC Aron

Abstract

Male rats castrated as adults were given successive doses of estradiol benzoate (EB) combined or not, with dexamethasone (DEXA) at the end of estrogen treatment. Two experiments were done to determine if progesterone (P) of adrenocortical origin was involved in the display of lordosis behavior under these experimental circumstances. There was a significant rise in blood P concentration in animals given 0.5 and 1.0 microgram EB when compared with oil-control injected animals, an effect which was completely suppressed by DEXA treatment. An increase in the proportion of estrogen treated animals displaying lordosis responses to male mounts was found with increasing doses of EB and paralleled the effects of EB on P adrenocortical secretion. However, the number of feminized animals given 1 microgram EB + DEXA was reduced to the level corresponding to the effects of 0.5 microgram EB on lordosis behavior. These data show that the secretion of P by the adrenals is involved in the expression of lordosis behavior in castrated male rats primed with repeated doses of estrogen.

References

Jul 1, 1977·The Journal of Endocrinology·T F Ogle, J I Kitay
Oct 1, 1977·Psychoneuroendocrinology·M Al Satli, C Aron
Feb 1, 1977·Hormones and Behavior·N E van de Poll, H van Dis
Mar 1, 1972·Acta Endocrinologica·Y Emment, W P Collins
Aug 1, 1968·The Journal of Endocrinology·H H FederR W Goy
May 1, 1969·The Journal of Endocrinology·J M Davidson, S Levine
Jun 1, 1969·Endocrinology·J M Davidson
Apr 1, 1983·Physiology & Behavior·P CorbierJ Rhoda
Mar 1, 1964·The Journal of Clinical Endocrinology and Metabolism·J I KITAY

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Citations

Oct 11, 2012·ISRN Obstetrics and Gynecology·Emmanouil KalampokasDimitrios Botsis

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