Linked Life Data

6466995

Source:http://linkedlifedata.com/resource/pubmed/id/6466995

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1984-10-19
pubmed:abstractText
GABA-transaminase (GABA-T) activity of fresh frozen coronal sections through rat striatum was evaluated 4-6 weeks after intrastriatal application of kainic or ibotenic acid. 16 micrograms sections were processed for GABA-T histochemistry and were evaluated quantitatively by computerized densitometry using image analysis. Alternate sections (200 micrograms) were assayed for GABA-T activity in vitro. Gross examination of sections stained for GABA-T revealed obvious lack of staining in the vicinity of lesions produced by either kainate (0.5-1.0 micrograms) or ibotenate (10-20 micrograms); the extent of each lesion was clearly delineated by the stain. Quantitative analysis of stained sections revealed that the lesioned tissue contained 80-90% less GABA-T activity than control tissue. This loss of GABA-T was in agreement with values obtained in adjacent sections assayed in vitro. Similar studies in substantia nigra clearly and quantitatively demonstrated damage induced by ibotenate or kainate in this nucleus as well as in tissue in the overlying reticular formation. Moreover, two compartments of GABA-T were discriminated in substantia nigra: one associated with neural perikarya, which was sensitive to kainic and ibotenic acids (80% of total GABA-T), and a second associated with afferent terminals arising from forebrain projections (20%). Thus, after destruction of neurons with kainic or ibotenic acid, GABA-T activity is largely eliminated. Under these conditions, it appears that glia contribute relatively little to the GABA-T activity measured either histochemically or by direct chemical assay in homogenates.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0006-8993
pubmed:author
pubmed:issnType
Print
pubmed:day
30
pubmed:volume
307
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
255-62
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Quantitative histochemical measurement of GABA-transaminase: method for evaluation of intracerebral lesions produced by excitotoxic agents.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.