摘要
目的探讨铂类化疗药物相关基因多态性对接受含奥沙利铂方案辅助化疗胃癌患者的疗效预测价值。方法经病理确诊的晚期胃癌患者126例,接受改良FOLFOX4方案化疗至少6周期。采用TaqMan探针实时荧光定量聚合酶链反应(PCR)法和直接测序法对患者外周血切除修复交叉互补基因1(ERCCl)第118位密码子,x线修复交叉互补基因1(XRCCl)第399位密码子,着色性千皮病基因D(XPD)第751位密码子和谷胱日肽s-转位酶1(GSTPl)第105位密码子进行多态性分析;分析各基因型与胃癌患者生存时问的相关性。结果126例胃癌患者基因型分析显示野生纯合子、杂合子和突变纯合子频率在ERCCl-118中为64.29%,28.57%和7.14%;在XRCCl.399中为56.35%,38.89%和4.76%;在XPD-751中为84.92%,15.08%和0,以及在GSTPl.105中为68.25%,30.60%和3.97%。单因素分析显示ERCCl-118,XRCCl-399和GSTPl-105单核苷酸多态性对患者无复发生存时问和总生存时间均有预测价值。多因素Cox风险模型分析提示ERCCl-118基因型对尢复发生存时间(P〈0.001,HR=2.362;95%CI:1.458~3.827)和总生存时问(P=0.001;HR=2.388;95%CI:1.448~3.937)均具有预测价值,而XRCCl-399基因型仅对无复发生存时间有预测价值,XRCCl-399A/A和A/G基因型患者疾病复发风险显著降低(P=0.031;HR=0.569;95%CI:0.341~0.949)。结论外周血ERCCI-118C/C基因型(野生型)和XRCCI-399A/G或A/A基因型(突变型)胃癌患者接受含奥沙利钔方案辅助化疗生存可能获益。
Objective To explore the predictive values of platinum-related genes in gastric cancer patients on oxaliplatin-based adjuvant chemotherapy. Methods A total of 126 gastric cancer patients received at least 6 cycles of modified FOLFOX4 adjuvant chemotherapy. Single nuclear polymorphisms (SNPs) in ERCC1 Aspll8Asp, XRCC1 Arg399Gln, XPD Lys751Gln and GSTP1 Ilel05Val were assessed with 5' nuelease allelic discrimination assay (TaqMan) by real-time polymerase chain reaction and direct sequencing. The genotypes were tested for an association with survivals in gastric cancer patients on an oxaliplatin-based adjuvant chemotherapy regimen. Results The genotypic analysis of all patients indicated the frequencies for the homozygous wild-type allele, heterozygous and homozygous polymorphic variant: 64.29%, 28.57% and 7.14% for ERCCI-ll8; 56.35%, 38.89% and 4.76% for XRCC1-399; 84.92% , 15.08% and 0 for XPD-751 ; and 68.25% , 30. 60% and 3.97% for GSTPI-105. Univariate analysis indicated that the ERCC1-118, the XRCC1-399 and the GSTPI-105 SNPs showed the predictive values for RFS ( relapse-free survival) ( P 〈 0. 001 , P = 0. 001 and P 〈 0. 001 respectively) and OS ( overall survival) ( P 〈 0. 001, P = 0. 001 and P = 0. 019 respectively). A muhivariable analysis of Cox proportional hazard regression model suggested that ERCCI-118 had a significant predictive value for RFS (P 〈 0. 001 , HR=2.362; 95%CI:1.458-3.827) and OS (P=0.001; HR=2.388; 95%CI: 1.448 -3.937) and XRCC1-399 had only a significant predictive value for RFS. And XRCC1-399 (A/A + A/G) genotype couldsignificantly decrease the recurrence risk of patients ( P 〈 0. 001, HR = 0. 569 ; 95% CI: O. 341 - 0. 949). Conclusion Gastric cancer patients with ERCCI-118 C/C genotype and XRCC1-399A/G or A/A genotype may benefit from an oxaliplatin-based adjuvant chemotherapy.
出处
《中华医学杂志》
CAS
CSCD
北大核心
2011年第4期256-259,共4页
National Medical Journal of China
基金
江苏省常州市科技计划基金(CS20092025)
关键词
胃肿瘤
化学疗法
辅助
多态性
单核苷酸
预后
Stomach ecoplasms
Chemotherapy, adjuvant
Polymorphism, single nucleotide
Prognosis