The Cytochrome P450 2C19 Polymorphism Associated with Major AdverseCardiovascular Events Risk in Kazak Patients Undergoing PercutaneousCoronary Intervention and Receiving Clopidogrel

BACKGROUND: Clopidogrel activity is influenced by cytochrome P450 (CYP450). CYP2C19 polymorphisms vary by ethnicity and region. OBJECTIVE: The aim of the study is to assess the effect of genetic polymorphisms in CYP2C19*2 and *3 and clinical and demographic factors on major adverse cardiovascular events (MACE) in Kazak patients following percutaneous coronary intervention (PCI). METHODS: 397 patients with PCI treated with clopidogrel and aspirin for at least 12 months were enrolled and outcomes within 1 year were recorded. Approximately 2 ml of peripheral venous blood samples were used for genotype detection. Multivariable logistic regression analyses were performed to identify factors associated with MACE. RESULTS: 95 patients (23.9%) suffered MACE during the period. Logistic regression analysis revealed CYP2C19*2 carriers (odds ratio [OR]: 2.431, 95% [confidence interval] CI: 1.136- 5.275, P = 0.027) and poor metabolizers (OR: 2.128, 95% CI: 0.899-4.82, P = 0.043) to be significantly associated with MACE. CONCLUSION: The CYP2C19*2 allele variants and poor metabolizers were found to be associated with MACE in a clopidogrel-treated Kazak population with acute coronary syndrome following PCI.