Effects of four novel genetic polymorphisms on clopidogrel efficacy in Chinese acute coronary syndromes patients.

Dual antiplatelet therapy is the gold standard for the clinical treatment of coronary artery disease, especially for acute coronary syndromes patients. However, a substantial number of patients do not respond to clopidogrel despite a standardized dosage regimen, and this is directly associated with poor prognosis. Genetic polymorphisms may be one of the most important factors that contribute to this phenomenon. In this study, we aimed to detect new single nucleotide polymorphisms that can influence the efficacy of clopidogrel in 851 acute coronary syndromes (ACS) patients. Four outcomes (cerebrovascular event, Acute Myocardium Infarction, unstable angina and death) were used as endpoints among three cohorts (northern, central and southern China) of acute coronary syndromes patients. Three SNPs (rs2244923, rs2773341 and rs34428341) were significantly associated with at least one outcome in all subjects. One SNP rs16863352, may play a role in predicting unstable angina in acute coronary syndrome patients ≥75years of age.