Abstract
Platelets are involved in the occlusion of coronary arteries after rupture of an atherosclerotic plaque. Furthermore, activated platelets release large quantities of growth factors, chemokines and interleukins that regulate inflammatory reactions. Therefore, we hypothesized that high basal platelet reactivity may contribute to an increased risk of myocardial infarction (MI) in premenopausal women. We assessed the relation between high platelet reactivity and MI in a population-based case-control study among premenopausal women (aged < 50 years). We used multivariable logistic regression to quantify the effect of high platelet reactivity, adjusted for potential confounders. Platelet reactivity was estimated by plasma levels of neutrophil activating peptide 2 (NAP-2), CXC chemokine ligand (CXCL)4, soluble glycoprotein 1b (sGPIb) and soluble P-selectin. High platelet reactivity (i.e. levels >or= 90th percentile control subjects) was associated with a 2- to 3-fold increased incidence of MI: the adjusted odds ratios (ORs) were 3.0 [95% confidence interval (CI) 1.4-6.4] for NAP-2, 2.2 (0.9-5.1) for CXCL4, 1.9 (0.7-4.6) for sP-selectin and 2.5 (1.1-5.7) for sGPIb. The incidence of MI dose-dependently increased when more markers were e...Continue Reading
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