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Neuropeptides ; 31(5): 517-21, 1997 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-9413031

RESUMEN

beta-endorphin was administered intracerebroventricularly into the lateral and third ventricles of ovariectomized, oestrogen- and progesterone-primed rats, and its effect on lordosis and ear-wiggling was assessed. A dose of 2 micrograms beta-endorphin facilitated lordosis when infused into the lateral ventricle, but inhibited lordosis when infused into the third ventricle. The effects were the same whether measured at 30, 60 or 90 min following infusion. beta-endorphin had no significant effect on ear-wiggling frequency when administered in either ventricle. The differential effects of beta-endorphin depending on site of administration may reflect the activation of distinct opioid receptor subtypes within the brain.


Asunto(s)
Conducta Sexual Animal/efectos de los fármacos , betaendorfina/farmacología , Análisis de Varianza , Animales , Femenino , Inyecciones Intraventriculares , Postura , Ratas , Ratas Sprague-Dawley
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