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Journal of ZheJiang University(Medical Science)  2012, Vol. 41 Issue (5): 540-546    DOI:
    
Expression of RRM1 and ERCC1 genes in tumor tissues and peripheral blood lymphocytes of advanced non-small cell lung cancer
ZHANG Guo-bing,CHEN Jian,WANG Lin-run,LI Jun,LI Min-wei,XU Nong,SHEN-TU Jian-zhong
The First Affiliated Hospital,Zhejiang University School of Medicine,Hangzhou 310003,China
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Abstract  Objective: To investigate the expression of RRM1 and ERCC1 genes in tumor tissues and peripheral blood lymphocytes of advanced non-small cell lung cancer (NSCLC).
Methods: Tissue and peripheral blood samples were collected from 49 advanced NSCLC patients treated with gemcitabine plus carboplatin.The expressions of RRM1 and ERCC1 mRNA in tumor tissue and peripheral lymphocytes were detected by real-time fluorescent quantitative PCR.The relationship of gene expression with clinical characteristics,chemotherapy response and prognosis was analyzed.
Results: The RRM1 expression in tumor tissues was positively correlated with that in peripheral blood lymphocytes,while no significant correlation was observed between ERCC1 expression in tumor tissues and that in peripheral blood (rs=0.332 and 0.258;P=0.020 and 0.073,respectively).The expression of RRM1 and ERCC1 in tumor tissues peripheral lymphocytes was synchronous(rs=0.634 and 0.351;P<0.001 and 0.013,respectively).There was no significant correlation of gene expression with gender,age,smoking status,performance status,clinical stages and histological types of patients (P>0.05).Significant difference was found in response rate to chemotherapy(P<0.05,P<0.01,P<0.05),median survival time(P<0.05,P<0.01,P<0.05) and 1-year survival rate (P<0.01,<0.05,P<0.05) between patients with low RRM1 and ERCC1 expression levels in tumor tissues or low RRM1 expression levels in peripheral blood and those with high RRM1 and ERCC1 expression levels.The patients with low ERCC1 expression levels in tumor tissues gained higher 2-year survival rate(P<0.05).There was no correlation of the expression of ERCC1 in peripheral blood with the response to chemotherapy and prognosis(P>0.05).
Conclusion: The expression of RRMI and ERCC1 genes in tumor tissues and RRM1 in peripheral blood lymphocytes is closely correlated with the response to chemotherapy and prognosis of patients with advanced NSCLC treated with gemcitabine plus carboplatin.


Key wordsCarcinoma     
Published: 25 September 2012
Cite this article:

. Expression of RRM1 and ERCC1 genes in tumor tissues and peripheral blood lymphocytes of advanced non-small cell lung cancer. Journal of ZheJiang University(Medical Science), 2012, 41(5): 540-546.

URL:

http://www.zjujournals.com/med/     OR     http://www.zjujournals.com/med/Y2012/V41/I5/540


晚期非小细胞肺癌肿瘤组织和外周血淋巴细胞中RRM1和ERCC1基因表达的研究

目的:探讨晚期非小细胞肺癌(NSCLC)肿瘤组织和外周血淋巴细胞中RRM1、ERCC1基因表达水平及其临床意义。
方法:应用实时荧光定量PCR技术检测49例晚期NSCLC肿瘤组织和外周血淋巴细胞中RRM1、ERCC1 mRNA表达水平,对照分析其与患者临床特征、吉西他滨/卡铂方案的化疗反应以及预后的关系。
结果:肿瘤组织和外周血淋巴细胞中RRM1表达水平呈正相关(rs=0.332,P<0.05),而ERCC1无相关(rs=0.258,P>0.05);肿瘤组织或外周血淋巴细胞中RRM1和ERCC1表达几乎同步(rs=0.634、0.351,P<0.05),但基因表达与患者的性别、年龄、吸烟状态、体力状况PS评分,以及肿瘤临床分期和组织学类型均无显著相关性(P均>0.05)。肿瘤组织中RRM1、ERCC1或外周血RRM1低表达者化疗有效率、中位生存期及1年生存率均高于高表达者,两者比较差异均有统计学意义(P<0.05),特别是肿瘤组织ERCC1低表达者有较高的2年生存率(P<0.05);而外周血ERCC1表达水平与化疗疗效以及预后均无相关性(P均>0.05)。
结论:肿瘤组织中RRM1、 ERCC1和外周血淋巴细胞中RRM1基因表达水平可能与晚期NSCLC患者吉西他滨/卡铂化疗的疗效以及预后密切相关。

关键词: 癌,  非小细胞肺/病理学,  肺肿瘤/病理学,  聚合酶链反应,  核苷酸还原酶类/生物合成,  DNA结合蛋白质类/生物合成,  脱氧胞苷/治疗应用,  脱氧胞苷/类似物和衍生物,  卡铂/治疗应用,  基因表达 
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