The CD14++CD16+ monocyte subset and monocyte-platelet interactions in patients with ST-elevation myocardial infarction.

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Aims: Monocytes contribute to both myocardial damage and repair by virtue of subset heterogeneity. The dynamics and functional characteristics of the three human monocyte subsets including the unique CD14++CD16+ subset and their contributions to monocyte platelet aggregates (MPAs) following ST-elevation myocardial infarction (STEMI) are unknown. We aimed to examine dynamic changes and relation to left ventricular ejection fraction (LVEF) of the three human monocyte subsets and their aggregates with platelets following STEMI. Methods: Three monocyte subsets, CD14++CD16-CCR2+ ('classical', Mon1), CD14++CD16+CCR2+ ('intermediate', Mon2) and CD14+CD16++CCR2- ('non-classical', Mon3), and their contribution to MPAs were analyzed by flow cytometry in 50 patients with STEMI, 40 patients with stable coronary artery disease (CAD) and 40 healthy volunteers. Study parameters were measured within 24 hours of primary percutaneous coronary intervention (PCI) (day1) and days 3, 7 and 30. Monocyte activation was assessed by measuring the nuclear factor κB (NFκB) pathway. LVEF was assessed 6-weeks after STEMI. Correlations between monocyte subsets/MPAs and plasma cytokines and troponin were assessed. Results: We observed marked differences in subset dynamics, with prominent increase in Mon2 (p


Original languageEnglish
JournalJournal of Thrombosis and Haemostasis
Publication statusPublished - 25 Dec 2011