Elevated Levels of Circulating DNA and Chromatin Are Independently Associated With Severe Coronary Atherosclerosis and a Prothrombotic State

Published on Aug 1, 2013in Arteriosclerosis, Thrombosis, and Vascular Biology6.618
· DOI :10.1161/ATVBAHA.113.301627
Julian I. Borissoff11
Estimated H-index: 11
Ivo A. Joosen11
Estimated H-index: 11
+ 10 AuthorsBas L.J.H. Kietselaer14
Estimated H-index: 14
Objective—Aberrant neutrophil activation occurs during the advanced stages of atherosclerosis. Once primed, neutrophils can undergo apoptosis or release neutrophil extracellular traps. This extracellular DNA exerts potent proinflammatory, prothrombotic, and cytotoxic properties. The goal of this study was to examine the relationships among extracellular DNA formation, coronary atherosclerosis, and the presence of a prothrombotic state. Approach and Results—In a prospective, observational, cross-sectional cohort of 282 individuals with suspected coronary artery disease, we examined the severity, extent, and phenotype of coronary atherosclerosis using coronary computed tomographic angiography. Double-stranded DNA, nucleosomes, citrullinated histone H4, and myeloperoxidase–DNA complexes, considered in vivo markers of cell death and NETosis, respectively, were established. We further measured various plasma markers of coagulation activation and inflammation. Plasma double-stranded DNA, nucleosomes, and myeloperoxidase–DNA complexes were positively associated with thrombin generation and significantly elevated in patients with severe coronary atherosclerosis or extremely calcified coronary arteries. Multinomial regression analysis, adjusted for confounding factors, identified high plasma nucleosome levels as an independent risk factor of severe coronary stenosis (odds ratio, 2.14; 95% confidence interval, 1.26–3.63; P=0.005). Markers of neutrophil extracellular traps, such as myeloperoxidase–DNA complexes, predicted the number of atherosclerotic coronary vessels and the occurrence of major adverse cardiac events. Conclusions—Our report provides evidence demonstrating that markers of cell death and neutrophil extracellular trap formation are independently associated with coronary artery disease, prothrombotic state, and occurrence of adverse cardiac events. These biomarkers could potentially aid in the prediction of cardiovascular risk in patients with chest discomfort. (Arterioscler Thromb Vasc Biol. 2013;33:2032-2040.)
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