Linked Life Data

2106092

Source:http://linkedlifedata.com/resource/pubmed/id/2106092

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1990-3-22
pubmed:abstractText
Rats were treated with monosodium glutamate (MSG), 4 mg/g on alternate days for the first 10 days of life, to induce lesions of the arcuate nucleus and destroy the majority of growth hormone-releasing hormone (GHRH) neurones. At 10 weeks of age, control (n = 42) and MSG-treated (n = 36) male rats were used to test the effect of glucocorticoids on growth hormone (GH) secretion. Each treatment group was divided into six study groups to determine the effect of betamethasone (BM), administered either 3 or 20 h prior to sacrifice, alone and in combination with hypoglycaemia (insulin 0.1 U/100 g). BM treatment of male rats was without effect on plasma GH levels in control animals. In contrast, glucocorticoid administered either 3 h before sacrifice or the previous evening significantly reduced circulating GH (p less than 0.001) in MSG-treated animals. The difference in plasma GH response to BM pretreatment in control rats and those with lesions of the arcuate nucleus indicates a hypothalamic action of glucocorticoids, presumably on somatostatin and GHRH neurones. In control animals the effects appear to be counterbalancing, but following destruction of GHRH neurones an uncompensated inhibitory influence was observed. Male MSG-treated rats had lower body weight (-25%) and reduced hypothalamic GHRH (-89%) and pituitary GH content (-69%) compared to male controls. Female rats which had undergone the same neonatal MSG treatment (n = 40) when sacrificed 1 week after their male counterparts showed similar reductions in body weight (-15%), hypothalamic GHRH (-74%), and pituitary GH (-67%).(ABSTRACT TRUNCATED AT 250 WORDS)
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0028-3835
pubmed:author
pubmed:issnType
Print
pubmed:volume
51
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
85-92
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Depletion of hypothalamic growth hormone-releasing hormone by neonatal monosodium glutamate treatment reveals an inhibitory effect of betamethasone on growth hormone secretion in adult rats.
pubmed:affiliation
Department of Medicine, University Hospital, Geneva, Switzerland.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't