Association between G-436 A (rs2333227) polymorphism at myeloperoxidase gene promoter andcoronary artery disease risk in Iranian patients

Polymorphonuclear cell-derived myeloperoxidase (MPO) is a known agent in the progression of inflammatory disorders via the production of reactive oxygen species. In this study, we investigated the association between rs2333227 polymorphism (G-436 A) within the MPO gene promoter and coronary artery stenosis. A total of 160 Iranian subjects (patients = 86 and controls = 74) were introduced on the basis of the study criteria. DNA was extracted from white blood cells and the genotype distribution was evaluated by PCR-RFLP technique. The AA, AG and GG genotype frequencies in study population were calculated to be 6.90%, 39.4% and 53.7%, respectively (p > 0.21). There was no significant difference between the genotype distribution and the extent of coronary stenosis in patients with 1VD, 2VD and 3VD (p = 0.71). The A allele frequencies were 25.6% and 27.4% in patients and controls, respectively. In general, our results indicate that the Iranian population genotype and allele distribution do not play a role in the development and severity of coronary artery disease.