Linked Life Data

12083505

Source:http://linkedlifedata.com/resource/pubmed/id/12083505

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2002-6-26
pubmed:abstractText
Plasma concentrations of secretory (non-pancreatic) phospholipase A2 (sPLA2) may rise 1000-fold during inflammation, and this acute phase response has been related to anticoagulant effects. In the present study this hypothesis was further investigated. Prothrombinase activity was measured for model membranes mimicking the phospholipid composition of the outer membrane of resting and activated blood platelets. Using ellipsometry, membrane degradation by sPLA2 could be measured simultaneously with inhibition of thrombin production. The same technique was used to study clotting, by the sudden appearance of fibrin strands on the membrane. Results were compared with the effects of sPLA2 on the activation of washed platelets and platelets in plasma. In buffer solution, model membranes were degraded by (patho)physiological concentrations of sPLA2. Even when only partially degraded, membranes rapidly lost their prothrombinase activity, indicating preferential degradation of phosphatidylserine. Addition of diluted plasma interfered with membrane degradation, and also with inhibition of prothrombinase activity. In agreement with these observations, sPLA2 inhibited thrombin production and annexin V-binding of activated washed platelets, but had no effects on platelet activation or clotting in plasma. These findings indicate that the elevated plasma sPLA2 concentrations observed in inflammatory disease will not reduce hypercoagulability in such patients.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0340-6245
pubmed:author
pubmed:issnType
Print
pubmed:volume
87
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
978-84
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Anticoagulant and membrane-degrading effects of secretory (non-pancreatic) phospholipase A2 are inhibited in plasma.
pubmed:affiliation
Cardiovascular Research Institute Maastricht, Maastricht University, The Netherlands.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't