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Abstract
RESULTS. Participants with CAD (n = 723) had 12% higher mean relative levels of nHDLox compared with those with invasively excluded CAD (n = 502, P < 0.001). Patients presenting with symptoms of an ACS had the highest nHDLox values when compared with the elective cohort (median 1.35, IQR 0.97 to 1.85, P < 0.001). In multivariate analysis adjusted for age, sex, body mass index, and hypertension, nHDLox was a strong independent predictor of ACS (P < 0.001) but not of CAD (P > 0.05).CONCLUSION. HDL antioxidant function is reduced in patients with CAD. nHDLox is strongly associated with ACS. TRIAL REGISTRATION. German Clinical Trials Register DRKS00014037. FUNDING. Brandenburg Medical School Theodor Fontane, the BIOX Stiftung, and NIH grants R01AG059501 and R03AG059462. BACKGROUND. High-density lipoprotein (HDL) function rather than its concentration plays an important role in the pathogenesis of coronary artery disease (CAD). The aim of the present study was to determine whether reduced antioxidant function of HDL is associated with the presence of a stable CAD or acute coronary syndrome (ACS).METHODS. HDL function was measured in 2 cohorts: 1225 patients admitted electively for coronary angiography and 196 patients with ACS. A validated cell-free biochemical assay was used to determine reduced HDL antioxidant function, as assessed by increased HDL-lipid peroxide content (HDLox), which was normalized by HDL-C levels and the mean value of a pooled serum control from healthy participants (nHDLox; unitless). Results are expressed as median with interquartile range (IQR).
Authors
Benjamin Sasko, Linda Scharow, Rhea Mueller, Monique Jaensch, Werner Dammermann, Felix S. Seibert, Philipp Hillmeister, Ivo Buschmann, Martin Christ, Oliver Ritter, Nazha Hamdani, Christian Ukena, Timm H. Westhoff, Theodoros Kelesidis, Nikolaos Pagonas
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