PMID: 3746161Aug 1, 1986Paper

Influence of oestrogen and noradrenergic afferent neurones on the response of LH and oxytocin to immobilization stress

The Journal of Endocrinology
T HiguchiH Negoro

Abstract

The influence of oestrogen on LH and oxytocin responses to immobilization stress, and the involvement of noradrenergic afferent neurones in these responses, was examined in ovariectomized rats with or without pretreatment with oestrogen or after noradrenergic transmitter blockade. Immobilization of the rats on a board in a supine position for 1 h brought about a rapid decrease in LH levels and an increase in oxytocin levels in the blood of ovariectomized rats. Oestradiol benzoate (20 micrograms) injected s.c. the day before immobilization, decreased basal LH levels but had no effect on basal oxytocin levels. Immobilization stress applied to oestrogen-treated rats induced a small but significant increase in LH concentrations and a rise in oxytocin concentrations similar to that in rats without oestrogen pretreatment. A dopamine-beta-hydroxylase inhibitor or phenoxybenzamine (alpha-adrenoceptor blocker) injected into ovariectomized rats reduced basal LH levels and increased basal oxytocin levels in the blood. Immobilization stress induced an increase in LH levels in rats treated with dopamine-beta-hydroxylase inhibitor, but had no effect in rats treated with phenoxybenzamine. Stress induced a larger increase in blood oxytocin lev...Continue Reading

Citations

Sep 30, 2005·Animal Reproduction Science·K HollensteinR Thun
May 14, 2010·Animal Reproduction Science·Jagat B Phogat, Nahid Parvizi
Dec 29, 1995·Annals of the New York Academy of Sciences·D JezovaM Vigas
Oct 24, 1998·International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience·O Martí, A Armario
Mar 1, 1997·Pharmacological Research : the Official Journal of the Italian Pharmacological Society·M M Abd el MohsenN A Ismail

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