ERCC1和XRCC1基因多态性与接受奥沙利铂化疗晚期大肠癌患者生存期的关系

目的:探讨DNA损伤修复基因ERCC1 Asn118Asn和XRCC1 Arg399Gln多态性与接受奥沙利铂一线化疗的中国晚期大肠癌患者生存期的关系.方法:99例晚期大肠癌患者化疗前抽取静脉血并提取DNA,以real-time PCR法对ERCC1、XRCC1基因进行SNP分型.患者接受奥沙利铂为主的化疗方案化疗,比较不同基因型与患者生存期的关系.结果:ERCC1 Asn118Asn基因位点在所研究的中国大肠癌患者中的突变频率为:C/C 50.51%、C/T 41.41%、T/T8.08%;XRCC1 Arg399Gln基因突变频率为:G/G 52.53%、G/A 38.38%、A/A 9.09%.99例晚期大肠癌患者中位TTP为7个月.ERCC1C/C基因型患者中位TTP 10个月,C/T T/T型患者中位TTP 5个月,二者有显著统计学差异(P<0.01);XRCC1G/G基因型中位TTP 10个月,G/A A/A基因型中位TTP 5个月,二者比较差异有显著性(P<0.01).两个基因联合多态性分析发现,同时携带ERCC1 C/C和XRCC1 G/G基因型、ERCC1 C/C和XRCC1 G/A A/A基因型、ERCC1 C/T T/T和XRCC1 G/G基因型、以及ERCC1 C/T T/T和XRCC1 G/A A/A基因型的患者中位TTP分别为11个月、6个月、5个月和5个月,4组比较差异有显著性(P<0.01).结论:ERCC1 Asn118Asn、XRCC1 Arg399Gln基因多态性与中国晚期大肠癌患者接受奥沙利铂一线化疗后的生存期有关.

Genetic Polymorphisms of ERCC1 and XRCC1 are Correlated with the TTP of Advanced Colorectal Cancer Patients Treated with Oxaliplatin-based Chemotherapy

Objective: To evaluate the effect of the polymorphisms of excision repair cross complementation group 1 (ERCC1) and X-ray repair cross complementing 1(XRCC1) on the overall survival of advanced colorectal cancer patients who received oxaliplatin-based chemotherapy. Methods: DNA was extracted from peripheral venous blood of 99 advanced colorectal cancer patients before chemotherapy. Real-time PCR was used to type the SNP of ERCC1 and XRCC1. The patients were routinely treated with oxaliplatin-based chemother...