Effect on the administration of LHRH on LH and prolactin plasma levels in adult female rats ovariectomized and maintained in constant light

E. Aguilar
C. Fernández-Galaz
A. Tejero
M.D. Vaticón
54

Abstract

The influence of prolonged periods of constant lighting on the plasma levels of LH and prolactin in adult female rats has been studied. No differences in either hormones are observed between intact animals under constant light of under a 12 hr (controls) darkness schedule. After ovariectomy LH values increase on both experimental conditions, with higher levels in the control group (p less than 0.01). After ovariectomy, a similar pattern is observed in animals under constant light, or under a 12 hr light darkness schedule, in the decrease of prolactin levels and in the increase of plasma LH levels after LHRH administration (100-1,000 ng). The stress induced by experimental manipulation, ether anesthesia and saline injection elevates plasma prolactin in both groups. LHRH administration blocks this response.

Keywords:
Light, Animals, Castration, Chemical, Darkness, Female, Gonadotropin-Releasing Hormone/pharmacology, Luteinizing Hormone/metabolism, Pituitary Gland/physiology, Prolactin/metabolism, Rats, Stimulation

Authors

E. Aguilar
C. Fernández-Galaz
A. Tejero
M.D. Vaticón


Metrics

Search GoogleScholar



Downloads

Download data is not yet available.

Section

Articles

Most read articles by the same author(s)

1 2 > >>