Effect of single oral dose of aspirin on human platelet functions and plasma plasminogen activator inhibitor-1.

Abstract:

:Previous reports documented the inhibitory efficacy of different doses of aspirin on arachidonic acid (AA)-induced platelet aggregation, however, the sensitivity of platelets toward other agonists as well as the effects of aspirin on platelet and plasma plasminogen activator inhibitor-1 (PAI-1) release and levels were not investigated. Hence, the present study was undertaken to investigate the effect and duration of action of a single oral dose (650 mg) of aspirin on human platelet functions (n = 34, normal healthy male and female volunteers) including aggregation, fibrinogen binding and PAI-1 release, and on the plasma level of PAI-1. Aspirin demonstrated a rapid onset of action (at 2 h after ingestion) in specifically inhibiting ex vivo AA-mediated functions including (a) fibrinogen binding to gel-purified platelets, (b) platelet aggregation, and (c) platelet PAI-1 release. A peak reduction of plasma PAI-1 level at 2 h was demonstrated as well. The effect of aspirin on the ex vivo AA-mediated effects (a-c) was shown to last for up to 4 days. However, aspirin treatment resulted in a rebound effect in platelet function (a-c) to other platelet agonists such as adenosine diphosphate or the combination of agonists including adenosine diphosphate, epinephrine, and AA. In conclusion, a single oral dose of aspirin has long-acting effects on AA-induced platelet activation and reduces plasma levels of PAI-1 as well.(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Cardiology

journal_title

Cardiology

authors

Mousa SA,Forsythe MS,Bozarth JM,Reilly TM

doi

10.1159/000175993

subject

Has Abstract

pub_date

1993-01-01 00:00:00

pages

367-73

issue

5-6

eissn

0008-6312

issn

1421-9751

journal_volume

83

pub_type

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