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Chinese Journal of Neurotraumatic Surgery(Electronic Edition) ›› 2023, Vol. 09 ›› Issue (04): 234-240. doi: 10.3877/cma.j.issn.2095-9141.2023.04.007

• Clinical Research • Previous Articles     Next Articles

Correlation between CYP2C19 gene polymorphism and clopidogrel resistance in patients with atherosclerotic thrombotic cerebral infarction in Hai'an area

Hongda Liu, Xiangzhong Shao(), Lin Li, Xiaowei Xu   

  1. Department of Neurology, Hai'an People's Hospital, Hai'an 226600, China
  • Received:2022-11-08 Online:2023-08-15 Published:2023-11-29
  • Contact: Xiangzhong Shao
  • Supported by:
    Social and Livelihood Science and Technology Plan Project of Nantong Science and Technology Bureau(MSZ19052)

Abstract:

Objective

To explore the correlation between CYP2C19 gene polymorphism and clopidogrel resistance in patients with atherosclerotic thrombotic cerebral infarction (ATCI) in Ha'an area.

Methods

Three hundred and fifty patients with ATCI admitted to Neurology Department of Hai'an People's Hospital were selected, and classified into extensive metabolizers (EM, n=157), intermediate metabolizers (IM, n=108) and poor metabolizers (PM, n=85) according to CYP2C19 genotype. All patients received clopidogrel treatment for one week upon admission. CYP2C19 genotyping was detected by fluorescence in situ hybridization. The inhibition of adenosine diphosphate (ADP) induced platelet aggregation and maximum amplitude (MA) of clot formation in patients with different CYP2C19 genotypes were measured by thrombelastogram. Then the related factors affecting clopidogrel resistance in ATCI patients were screened.

Results

Statistical difference was noted in the smoking, diabetes history, glycosylated hemoglobin (HbAlc) and low-density lipoprotein cholesterol (LDL-C) among different CYP2C19 metabolizers (P<0.05). The inhibition rate of ADP-induced platelet aggregation among different metabolizers was the highest in EM phenotype, followed by IM phenotype, and was the lowest in PM phenotype, with statistical difference (P<0.05). The MA of clot formation among different metabolizers was the largest in PM phenotype, followed by IM phenotype, and was the smallest in EM phenotype, with statistical difference (P<0.05). The incidence rate of clopidogrel resistance in PM phenotype was significantly higher than that of IM and EM phenotype, with statistical difference (P<0.05). Univariate analysis revealed that there were statistically significant differences in smoking, diabetes, and CYP2C19 genotypes among patients with different clopidogrel resistance (P<0.05). Multivariate Logistic regression analysis denoted that smoking, diabetes, CYP2C19 PM and IM phenotype were independent risk factors for clopidogrel resistance in ATCI patients (P<0.05).

Conclusion

Clopidogrel resistance is highly prevalent in ATCI patients with CYP2C19 PM and IM phenotype in Hai'an area, and smoking, diabetes mellitus and CYP2C19 PM and IM phenotype are all independent risk factors for the development of clopidogrel resistance in patients.

Key words: Atherosclerotic thrombotic cerebral infarction, CYP2C19 gene polymorphism, Clopidogrel resistance

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