Linked Life Data

2172242

Source:http://linkedlifedata.com/resource/pubmed/id/2172242

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
31
pubmed:dateCreated
1990-12-10
pubmed:abstractText
Because of the central role of fibrinogen binding in platelet aggregation and recent evidence implicating S-nitrosothiol compounds in the platelet inhibitory effects of endogenous and exogenous organic nitrate compounds, we examined the effect of the S-nitrosothiol S-nitroso-N-acetylcysteine (SNOAC) on fibrinogen binding to gel-filtered human platelets. We found that SNOAC markedly inhibited the binding of fibrinogen to normal human platelets in a dose-dependent fashion and that this inhibitory effect was the result of both an increase in the apparent Kd of the platelet receptor for the fibrinogen molecule (from 6.8 x 10(-7) to 1.8 x 10(-6) M, a 2.7-fold increase) and a decrease in the total number of fibrinogen molecules bound to the platelet (from 76,200 to 38,250, a 50% decrease). In addition, we noted a rapid, dose-dependent rise in platelet cyclic GMP levels following exposure of platelets to SNOAC which was significantly inversely correlated with fibrinogen binding and was accompanied by inhibition of intracellular calcium flux in response to a variety of platelet agonists. Similar dose-dependent inhibition of fibrinogen binding was found in the presence of cyclic GMP analogues and was significantly enhanced by inhibition of platelet cyclic GMP phosphodiesterase. These results describe the inhibition of platelet fibrinogen binding by an S-nitrosothiol compound, help define the biochemical mechanism by which S-nitrosothiols inhibit platelet aggregation, and lend support to the view that cyclic GMP is an important inhibitory intracellular mediator in human platelets.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0021-9258
pubmed:author
pubmed:issnType
Print
pubmed:day
5
pubmed:volume
265
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
19028-34
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Inhibition of fibrinogen binding to human platelets by S-nitroso-N-acetylcysteine.
pubmed:affiliation
Cardiovascular Division, Brigham and Women's Hospital, Boston, Massachusetts 02115.
pubmed:publicationType
Journal Article, In Vitro, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't