Linked Life Data

3931713

Source:http://linkedlifedata.com/resource/pubmed/id/3931713

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1985-12-10
pubmed:abstractText
The dependence of the acute increases in plasma gonadotropins following castration on luteinizing hormone-releasing hormone (LHRH) was assessed with the use of a potent LHRH antagonist [ALHRH; (Nac-L-Ala1,p-Cl-D-Phe2,D-Trp3,6) LHRH]. Blood samples were collected from male and female rats at the time of castration and 2, 4, 8, 12, 24 and 48 h following and plasma gonadotropin levels were determined. Immediately following castration (diestrus I for females) animals received one of the following treatments: females-vehicle, 100 micrograms ALHRH, 50 micrograms estrogen benzoate (EB), or 100 micrograms ALHRH + 50 micrograms EB; males-vehicle, 100 micrograms ALHRH, 500 micrograms testosterone propionate (TP), or 100 micrograms ALHRH + 500 micrograms TP. ALHRH blocked the selective increase in plasma follicle-stimulating hormone (FSH) observed in female rats as well as the parallel increases in both gonadotropins seen in male rats following castration. Administration of EB or ALHRH + EB to females significantly suppressed both gonadotropins compared with control levels. However, EB alone did not completely block the rise in plasma FSH in females. In males, all three treatments significantly suppressed the increases in both gonadotropins when compared with control levels. These data demonstrate that hypothalamic LHRH plays an essential role in the acute elevations of plasma gonadotropins following castration in rats. In addition, these data suggest that the selective rise of FSH in females is dependent on LHRH stimulation of pituitary gonadotropes.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0006-3363
pubmed:author
pubmed:issnType
Print
pubmed:volume
33
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
715-21
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Postcastration rise in plasma gonadotropins is blocked by a luteinizing hormone-releasing hormone antagonist.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.