Linked Life Data

7972691

Source:http://linkedlifedata.com/resource/pubmed/id/7972691

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
1994-12-27
pubmed:abstractText
Initial findings from our laboratory have indicated that muscarinic enhancement of K(+)-evoked release of dopamine from perifused striatal slices is reduced after exposure to 56Fe-particle irradiation. This finding suggested that there is a radiation-induced deficit in muscarinic receptor sensitivity. Subsequent findings have indicated that at least part of the loss in sensitivity may occur as a result of alterations in the initial steps of the signal transduction process and involve muscarinic receptor-G protein coupling/uncoupling. The present study was carried out to localize this deficit further by determining carbachol-stimulated low-Km guanosine triphosphatase (GTPase) activity in striatal and hippocampal tissue obtained from rats exposed to 0, 0.1 or 1.0 Gy of 56Fe-particle irradiation. In addition, to examine the specificity of the effect of 56Fe-particle irradiation, alpha 1-adrenergic-stimulated low-Km GTPase activity was also examined in these tissues. The results showed that there was a high degree of specificity in the effects of 56Fe particles. Decrements were observed in muscarinic-stimulated low-Km GTPase in striatum but not in hippocampus, and 56Fe-particle irradiation did not affect alpha 1-adrenergic low-Km GTPase activity in either brain tissue.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0033-7587
pubmed:author
pubmed:issnType
Print
pubmed:volume
140
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
382-6
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1994
pubmed:articleTitle
Iron-56 irradiation diminishes muscarinic but not alpha 1-adrenergic-stimulated low-Km GTPase in rat brain.
pubmed:affiliation
Gerontology Research Center, National Institute on Aging, National Institutes of Health, Baltimore, Maryland 21224.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S.