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Volume 2014 (2014), Article ID 821686, 6 pages
Research Article

Association of the Total Cholesterol Content of Erythrocyte Membranes with the Severity of Disease in Stable Coronary Artery Disease

1Department of Clinical Biochemistry, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Hezar-Jerib Street, Isfahan 8174673461, Iran
2Isfahan Cardiovascular Research Centre, Cardiovascular Research Institute, Isfahan University of Medical Sciences, Isfahan 8187698191, Iran

Received 27 June 2014; Revised 20 September 2014; Accepted 28 September 2014; Published 20 October 2014

Academic Editor: Gordon Ferns

Copyright © 2014 Gholamreza Namazi et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Increasing evidence suggests that erythrocytes may participate in atherogenesis. We sought to investigate whether the total cholesterol content of erythrocyte membranes (CEM) is significantly different in patients with stable coronary artery disease (CAD) compared to patients with nonsignificant coronary stenosis and determine the correlation between CEM and the severity of coronary stenosis. Methods. The population included 144 patients, undergoing clinically indicated coronary angiography. The severity of coronary stenosis was scored after coronary angiography and patients were divided into two groups; the -stenosis group (CAD patients, ) had a significant stenosis indicated by coronary angiography and the second group, -stenosis (), had nonsignificant coronary stenosis. Lipid parameters were determined by routine laboratory methods. CEM was measured using an enzymatic assay, and protein content was assessed by the modified Lowry method. Results. The mean of CEM levels was higher () in stable CAD patients (137.2 µg/mg of membrane protein) compared with -stenosis patients (110.0 µg/mg of membrane protein). The coronary artery scores were correlated positively with CEM levels (, ). Conclusion. CEM levels are positively associated with the severity of CAD, meaning that CEM might contribute to the development of CAD.