Linked Life Data

3839085

Source:http://linkedlifedata.com/resource/pubmed/id/3839085

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1985-7-12
pubmed:abstractText
Thromboxane B2 and 6-keto-PGF1 alpha (6KPGF1 alpha), the major stable metabolites of thromboxane and prostacyclin, are present in the CNS, where they appear to be mainly produced within and/or acting upon the vascular district. Their concentrations are of few pg/mg protein in rat brain cortex of animals sacrificed by microwave (MW) radiation, procedure which inactivates tissue enzymes and allows the determination of endogenous "basal" levels of eicosanoids. Levels of 6KPGF1 alpha and especially those of TxB2 increase several fold over the basal values in brain cortex of animals sacrificed by decapitation followed by a few minute interval before analysis (post-decapitation ischemia, PDI). Pretreatment of animals with the vasoactive drug papaverine, resulted in elevation of brain basal levels of 6KPGF1 alpha and with the carbochromene derivative AD6 in reduction of basal levels of TxB2, whereas the calcium antagonist nifedipine and dipyridamole did not modify basal levels of the two eicosanoids. Treatments with papaverine and AD6 reduced the accumulation of TxB2 and enhanced that of 6KPGF1 alpha occurring after PDI, to different extents, both resulting, however, in reduction of the TxB2/6KPGF1 alpha ratio. Nifedipine instead, decreased the release of both eicosanoids and resulted in elevation of the TxB2/6KPGF1 alpha ratio, whereas dipyridamole had no effect. In conclusion, the evaluation of the overall effects of drug treatments on the TxB2/6KPGF1 alpha ratio in cerebral tissue, provided useful informations on the pharmacological modulation of vascular eicosanoids in this district.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
0090-6980
pubmed:author
pubmed:issnType
Print
pubmed:volume
29
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
579-87
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Differential effects of various vasoactive drugs on basal and stimulated levels of TXB2 and 6-keto-PGF1 alpha in rat brain.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't