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To investigate the differences in the correlation between multidrug resistance protein 1 ( MDR1) ( ABCB1) gene polymorphism and clopidogrel resistance in patients of the Hui and Han nationalities with percutaneous coronary intervention (PCI). A total of 377 subjects (154 people of Hui nationality, 223 people of Han nationality) with PCI were enrolled in the study. Each patient's platelet aggregation rate was induced by adenosine diphosphate and measured using light turbidimetry. Based on the results, the patients were divided into two groups: a clopidogrel resistance (CR) group and a non-clopidogrel resistance (NCR) group. Restrictive fragment-length polymorphism polymerase chain reaction technology was then used to determine the genotype and alleles at two loci (C3435 T[rs1045642] and C1236 T[rs1128503]), calculate the frequencies of the genotype and alleles at these two loci, and conduct correlation analysis. The incidence rate of clopidogrel resistance was 23.4%, and the frequencies of the TT genotype and T allele at C3435 T for patients of both nationalities were significantly higher in the CR group than in the NCR group (P &lt; 0.05). There were no significant differences between the two groups in genotype or allele frequency at C1236 T. There was a significant difference in the distribution of C1236 T polymorphism between the two nationalities (P &lt; 0.05), but there was no significant difference between the two nationalities in C3435 T polymorphism. Patients with a T allele at MDR1 C3435 T are more likely to show clopidogrel resistance, and no significant differences were identified in C3435 T gene polymorphism between the two nationalities.

The Correlation Between MDR1 Gene Polymorphism and Clopidogrel Resistance in People of the Hui and Han Nationalities