CYP2C19 Polymorphisms and Antiplatelet Effects of Clopidogrel in Acute Ischemic Stroke in China
2013
Background and Purpose—Little research regarding genotypes and clopidogrel response related to acute ischemic stroke has been published. This study was conducted to investigate whether the polymorphisms of receptors or enzymes involved in the metabolic process of clopidogrel affect clopidogrel response and prognosis related to acute stroke. Methods—A total of 259 patients with acute ischemic stroke were enrolled in this study; all received follow-up evaluations 3 and 6 months after clopidogrel treatment. CYP2C19, CYP3A4, and P2Y12 were screened. The adenosine diphosphate-induced platelet aggregation test, the National Institutes of Health Stroke Scale (NIHSS), and the modified Rankin Scale (mRS) were used, and blood vascular events were evaluated. Results—The difference before and after clopidogrel treatment on adenosine diphosphate-induced platelet aggregation was significantly smaller in patients carrying 1 or 2 CYP2C19 loss-of-function alleles (*2, *3) compared with patients carrying none. Patients wit...
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