Objective:To evaluate the predictive values of gene expressions of ribonucleotide reductase M1(RRM1) and breast cancer susceptibility gene 1(BRCA1) in peripheral blood from Chinese patients with non-small-cell lung ca...Objective:To evaluate the predictive values of gene expressions of ribonucleotide reductase M1(RRM1) and breast cancer susceptibility gene 1(BRCA1) in peripheral blood from Chinese patients with non-small-cell lung cancer(NSCLC) treated with gemcitabine plus platinum.Methods:Forty Chinese patients with advanced NSCLC were recruited and received gemcitabine 1200 mg/m 2 on Days 1 and 8 plus carboplatin AUC 5 on Day 1.RRM1 and BRCA1 expression levels in peripheral blood were detected by quantitative reverse transcription-polymerase chain reaction(RT-PCR) .Kaplan-Meier survival curve and log-rank test were performed to evaluate the correlation between gene expression and overall survival for these subjects.Results:No correlation was observed between gene expression of RRM1 and that of BRCA1(P>0.05) ,but there was a strong correlation between the expression of RRM1 and the response to chemotherapy(P=0.003) .Subjects with low RRM1 expression levels in peripheral blood had longer sur-vival time than those with high RRM1 expression levels(16.95 vs.12.76 months,log-rank 3.989,P=0.046) .However,no significant association between BRCA1 expression levels and survival time was found(16.80 vs.13.77 months,log-rank 0.830,P=0.362) .Conclusions:Patients with low RRM1 expression levels in peripheral blood have a greater response to chemotherapy and longer survival time.Advanced NSCLC patients with low RRM1 expression levels may benefit from gemcitabine plus platinum therapy.RRM1 mRNA expression in peripheral blood could be used to predict the prognosis of NSCLC treated by gemcitabine and platinum.展开更多
文摘目的:探讨血管内皮生长因子受体2(VEGFR2)基因V297I位点对贝伐珠单抗联合化疗治疗晚期非小细胞肺癌(nonsmall cell lung cancer,NSCLC)患者疗效的影响。方法:收集2010年1月到2017年1月在河南中医药大学第三附属医院肿瘤科135例一线接受贝伐珠单抗联合含铂双药化疗的晚期NSCLC患者的临床资料,用PCR-RFLP法检测患者外周血VEGFR2基因型,q PCR法检测患者癌组织中VEGFR2 m RNA的表达。通过Logistic回归模型分析多态性位点的基因型和其他变量的相关性,用Kaplan-Meier法分析基因型和预后的相关性,以Cox风险模型分析患者PFS的危险因素。结果:在VEGFR2的多态性位点中,只发现了V297I位点其有临床意义。V297I位点位于该基因的编码区,在研究人群的基因分布频率为CC型99例(73.33%)、CT型33例(24.44%)、TT型3例(2.23%),最小等位基因频率为0.14,3种基因型分布频率符合哈迪温-伯格平衡(P>0.05)。135例NSCLC患者的ORR为45.93%,中位PFS为8.2个月,中位OS为20.8个月。CT/TT型和CC型患者的ORR分别为41.67%和47.47%(P>0.05),中位PFS分别为6.2和8.6个月(P<0.01),中位OS分别为18.9和21.5个月(P<0.05)。CT/TT基因型患者癌组织中VEGFR2 m RNA水平明显高于CC型患者(P<0.01)。影响NSCLC患者PFS的危险因素有:V297I位点和性别、ECOG评分。结论:在接受贝伐珠单抗联合化疗治疗的晚期NSCLC患者中,VEGFR2基因V297I位点可能通过VEGFR2基因的表达影响贝伐珠单抗一线治疗NSCLC患者的疗效和预后。
基金Project supported by the Science and Technology Planning Project of Zhejiang Province(No.2009C33165)the Medical Science Research Fund Scheme of Zhejiang Province(No.2008A060),China
文摘Objective:To evaluate the predictive values of gene expressions of ribonucleotide reductase M1(RRM1) and breast cancer susceptibility gene 1(BRCA1) in peripheral blood from Chinese patients with non-small-cell lung cancer(NSCLC) treated with gemcitabine plus platinum.Methods:Forty Chinese patients with advanced NSCLC were recruited and received gemcitabine 1200 mg/m 2 on Days 1 and 8 plus carboplatin AUC 5 on Day 1.RRM1 and BRCA1 expression levels in peripheral blood were detected by quantitative reverse transcription-polymerase chain reaction(RT-PCR) .Kaplan-Meier survival curve and log-rank test were performed to evaluate the correlation between gene expression and overall survival for these subjects.Results:No correlation was observed between gene expression of RRM1 and that of BRCA1(P>0.05) ,but there was a strong correlation between the expression of RRM1 and the response to chemotherapy(P=0.003) .Subjects with low RRM1 expression levels in peripheral blood had longer sur-vival time than those with high RRM1 expression levels(16.95 vs.12.76 months,log-rank 3.989,P=0.046) .However,no significant association between BRCA1 expression levels and survival time was found(16.80 vs.13.77 months,log-rank 0.830,P=0.362) .Conclusions:Patients with low RRM1 expression levels in peripheral blood have a greater response to chemotherapy and longer survival time.Advanced NSCLC patients with low RRM1 expression levels may benefit from gemcitabine plus platinum therapy.RRM1 mRNA expression in peripheral blood could be used to predict the prognosis of NSCLC treated by gemcitabine and platinum.
