Linked Life Data

3082617

Source:http://linkedlifedata.com/resource/pubmed/id/3082617

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1986-5-1
pubmed:abstractText
This review has examined, in primates, the action of sex steroids on the neural timing mechanism that governs the intermittent release of GnRH by the hypothalamus, the so-called GnRH pulse generator. Determinants of hypothalamic GnRH pulse generator frequency have generally been examined indirectly by monitoring moment to moment fluctuations in circulating LH concentrations. Studies using this approach have led to the hypothesis that negative feedback control of LH secretion by the testes is mediated by the action of T, or of one of its metabolites, to retard the frequency of the GnRH pulse generator. P also appears capable of decelerating GnRH pulse frequency during the luteal phase of the menstrual cycle, but the physiological significance of this phenomenon remains to be clarified. To date, a cognate action of E2 on the GnRH pulse generator has not been described. Because of limitations in contemporary technology, the factors underlying amplitude modulation of the GnRH pulse generator are less well understood. In addition to the ability of certain sex steroids to decelerate the frequency of pulsatile GnRH discharge, E2 and P appear capable of facilitating the secretion of this hypothalamic releasing factor. However, the increase in GnRH pulse frequency and/or GnRH pulse amplitude that must underlie these stimulatory actions remains to be fully defined. An inhibitory action of high levels of circulating cortisol on the hypothalamic GnRH pulse generator has also been noted.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0163-769X
pubmed:author
pubmed:issnType
Print
pubmed:volume
7
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
75-88
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1986
pubmed:articleTitle
Gonadal regulation of hypothalamic gonadotropin-releasing hormone release in primates.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Review