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High levels of circulating endothelial microparticles in patients with acute coronary syndromes.

Abstract：

BACKGROUND:Endothelial injury plays a critical role in coronary artery disease (CAD), but the assessment of this injury has been problematical. Recently, it has been shown in vitro that endothelial cells (ECs) release endothelial microparticles (EMPs) on activation or apoptosis and that an assay of EMPs can provide useful information on EC status in patients with thrombotic disorders. This study is aimed at assessing possible correlations between EMPs, which are markers of endothelial injury, and clinical subgroups of patients with CAD. METHODS:A prospective, case-controlled study was conducted on 84 patients with CAD and 42 control subjects to investigate EMP profiles. Included were 64 patients with acute coronary syndromes ([ACS], 38 with myocardial infarction [MI] and 26 with unstable angina [UA]) and 20 patients with stable angina (SA). EMPs in platelet-poor plasma were measured flow cytometrically with combinations of fluorescent antibodies (anti-CD31, -51, -42), allowing distinction of EMPs from platelet microparticles (PMPs). Clinical subgroups of patients were correlated with EMP and PMP levels in blood. RESULTS:Two species of EMPs (CD31+ and CD51+) were evaluated. Both were significantly higher in patients with CAD than in control subjects. CD31+ EMP was higher in ACS than SA. Among patients with first MI, CD31+ EMP was higher in patients with MI than in patients with UA and was significantly higher than in patients with recurring MI. CD51+ EMP did not discriminate ACS from SA. A simultaneous assay of PMP showed correlation between EMPs and PMPs. However, PMPs did not discriminate patients with SA from control subjects. CONCLUSIONS:EMP assay appears promising for assessing EC injury in CAD.

journal_name

Am Heart J

journal_title

American heart journal

authors

Bernal-Mizrachi L,Jy W,Jimenez JJ,Pastor J,Mauro LM,Horstman LL,de Marchena E,Ahn YS

doi

10.1016/S0002-8703(03)00103-0

subject

Has Abstract

pub_date

2003-06-01 00:00:00

pages

962-70

issue

6

eissn

0002-8703

issn

1097-6744

pii

S0002870303001030

journal_volume

145

pub_type

杂志文章

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