六种基因多态性对中国汉族人群华法林稳定剂量的影响

Impact of six genetic polymorphisms on Warfarin maintenance dose variation in Chinese Han population

目的评价VKORC1、CYP2C9、GGCX、PROC、EPHX1及CYP4F2基因多态性对中国汉族人群华法林稳定剂量的影响。方法随机选取488例服用华法林抗凝且国际标准化比值均稳定达标的中国汉族患者，抗凝指证包括人工瓣膜置换术后、房颤及肺血栓栓塞症，对所有入选患者进行上述6种基因多态性检测，并记录患者平均每日华法林稳定剂量、人口学信息及合并用药情况等；分析VKORC1、CYP2C9、GGCX、PROC、EPHX1及CYP4F2基因多态性、人口学信息及合并用药对华法林稳定剂量的影响。结果VKORC1和CYP2C9基因多态性共解释了50％以上的中国汉族患者华法林稳定剂量的个体差异，其影响程度大于人口学特征、合并用药等因素；CYP4F2基因多态性仅能解释1％中国汉族患者的华法林稳定剂量的个体差异；GGCX、PROC及EPHX1基因多态性不影响中国汉族患者的华法林稳定剂量。结论VKORC1和CYP2C9基因多态性是影响中国汉族人群华法林稳定剂量的主要遗传因素。

Objective To evaluate the effect of VKORC1, CYP2C9, GGCX, PROC, EPHX1 and CYP4F2 gene polymorphisms on Warfarin maintenance dose variation in Chinese Han Population. Methods Four hundred eighty-eight patients with prosthetic heart valves, atrial fibrillation or pulmonary thromboembolism and achieved stable Warfarin dose were enrolled. TaqMan probe or direct sequencing were used to genotype VKORC1, CYP2Cg, GGCX, EPHX1 and CYP4F2 gene polymorphisms. Demographic characteristics, stable therapeutic dose of Warfarin and concomitant medications were collected for all patients. The effect of VKORC1, CYP2Cg, GGCX, PROC, EPHX1 and CYP4F2 gene polymorphisms, demographic characteristics and concomitant medications on Warfarin daily maintenance dose were analyzed with statistical method. Results VKORC1 and CYP2C9 gene polymorphisms could explain more than 50 Warfarin maintenance dose variation in recruited patients, while CYP4F2 gene polymorphisms could only explain 1%. GGCX, PROC and EPHX1 gene polymorphisms had no impact no Warfarin maintenance dose. VKORC1 and CYP2C9 gene polymorphisms have a greater impact on Warfarin maintenance dose compared with demographic characteristics and concomitant medications. Conclusion VKORC1 and CYP2C9 gene polymorphisms have a significant impact on Warfarin maintenance dose in Chinese Han population.