Abstract
Cell-free circulating DNA (cf-DNA) has recently arisen as a promising biomarker in acute cardiovascular pathologies and as a mortality predictor in myocardial infarction. We wanted to investigate whether the baseline cf-DNA concentration could serve as an indicator of increased cardiovascular risk and early atherosclerosis. The study population consisted of 1337 participants (aged 46–77 years) in the Health 2000 Survey. cf-DNA was quantified directly in plasma using the fluorescence-based Quant-iT™ high-sensitivity DNA assay kit. Increased cf-DNA levels paralleled a cluster of cardiometabolic risk factors, such as high blood pressure, unfavorable lipid metabolism profile and systemic inflammation in both sexes. In addition, higher cf-DNA levels indicated decreased arterial elasticity and glucose intolerance in women not using hormonal replacement therapy (HRT). The cf-DNA level was also observed to be an independent determinant for Young's elastic modulus but not for carotid artery compliance or beta stiffness index in the women not using HRT. Hence, we conclude that cf-DNA could serve as an auxiliary biomarker in cardiometabolic risk assessment and as an indicator of arterial stiffness in women not using HRT.
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