Effect of CYP2C19 polymorphism on platelet P2Y12 receptor signaling pathway in Chinese patients with stable coronary artery disease after the treatment of clopidogrel
10.3969/j.issn.1672-8467.2017.04.003
- VernacularTitle:CYP2C19基因多态性影响稳定型冠心病患者氯吡格雷治疗后血小板P2Y12受体信号通路的分子机制
- Author:
Huajie XU
;
Xin ZHAO
;
Hongyi WU
;
Bing FAN
- Keywords:
stable coronary artery disease;
CYP2C19;
clopidogrel;
P2Y12;
VASP;
Akt;
platelet reactivity
- From:
Fudan University Journal of Medical Sciences
2017;44(4):410-416
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the molecular mechanism of the effect of CYP2C19 polymorphism on the efficacy of clopidogrel in patients with stable coronary artery disease (SCAD).Methods A total of 208 patients with coronary artery disease undergoing percutaneous coronary intervention (PCI) were included.The CYP2C19 variant alleles were detected by gene sequencing.Platelet reactivity was assessed by thrombelastograph at 24 h after 300 mg clopidogrel loading.P2Y12-Gi signaling was measured by flow cytometric analysis of vasodilator-stimulated phosphorylation-platelet reactivity index (VASP-PRI) and Akt phosphorylation (P-Akt) index.Results Among 208 patients,40.9％ were classified as CYP2C19 * 1/* 1 (non-carriers) with no loss-of-function (LOF),44.7％ as CYP2C19 * 1/* 2 or CYP2C19 * 1/* 3 (one LOF carriers) and 14.4％ as CYP2C19 * 2/*2 or CYP2C19 * 2/* 3 (two LOF carriers).Both postclopidogrel platelet aggregation and VASP-PRI increased by the presence of one LOF allele,and were even more pronounced with the presence of two LOF alleles.In contrast,P-Akt index only increased in two LOF carriers.VASP-PRI was positively associated with postclopidogrel platelet aggregation (r =0.661,P＜0.001),but not with P-Akt index.Conclusions The two CYP2C19 LOF carriage was associated with more active state of P2Y12-Gi signaling in postclopidogrel platelet in Chinese patients with SCAD.
