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The influence of platelet activating factor on the effects of platelet agonists and antiplatelet agents in vitro.

Abstract：

:We assessed the effect of the intercellular mediator of inflammation, platelet activating factor (PAF), on platelet function. The interaction between PAF and the platelet agonists ADP, thrombin and convulxin was analyzed in vitro in whole blood with the use of flow cytometry and was further characterized with the use of receptor antagonists to PAF (ABT-491), P2Y1 (MRS-2179), and P2Y12 (cangrelor) as well as a monoclonal anti-PSGL-1 antibody (anti-CD162). Low concentrations of PAF (0.1 nM) synergistically augmented platelet activation induced by other agonists (P < 0.01). Augmentation by PAF was receptor mediated and did not require platelet-leukocyte interaction. With >99% inhibition of P2Y receptor-mediated platelet activation, greater than additive activation was still observed with the combination of ADP plus PAF. Accordingly, PAF synergistically augments platelet activation in response to ADP and thrombin, and the extent of inhibition exerted by P2Y receptor antagonists is decreased in the presence of PAF.

journal_name

J Thromb Thrombolysis

journal_title

Journal of thrombosis and thrombolysis

authors

Keating FK,Schneider DJ

doi

10.1007/s11239-008-0239-5

subject

Has Abstract

pub_date

2009-07-01 00:00:00

pages

38-45

issue

1

eissn

0929-5305

issn

1573-742X

journal_volume

28

pub_type

杂志文章

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