Abstract

背景与目的研究晚期非小细胞肺癌(non-small cell lung cancer, NSCLC)表皮生长因子受体(epidermal growth factor receptor, EGFR)基因突变情况和该基因突变状态对吉非替尼疗效的影响。方法于2007年1月-2009年12月对160例晚期非鳞癌NSCLC患者进行了EGFR基因检测,EGFR基因外显子19和外显子21突变检测采用突变富集PCR法。其中111例接受了吉非替尼治疗。中位生存期(overall survival, OS)和无疾病进展生存时间(progression free survival, PFS)的比较采用Kaplan-Meier方法计算。结果晚期非鳞癌NSCLC患者EGFR基因突变率为55%,多因素分析显示只有病理类型与是否突变明显相关。EGFR基因突变型患者的OS为29.0个月(95%CI: 24.2-33.8),野生型为21.0个月(95%CI: 14.7-27.3),两者差别无统计学差异。EGFR基因突变患者的PFS为17.0个月(95%CI: 5.6-17.6),而野生型为11.6个月(95%CI: 8.6-25.4),两者有明显性差别(P=0.022)。OS的多因素分析结果显示,OS与ECOG评分、病理类型、EGFR基因突变状态明显相关。PFS多因素分析结果显示,PFS与ECOG评分、既往化疗方案数和EGFR基因突变明显相关。EGFR基因外显子19突变与外显子21突变的OS和PFS无明显差别,客观疗效也无差别。结论晚期非鳞癌NSCLC EGFR基因突变患者的PFS明显优于野生型患者,OS有延长趋势。EGFR基因不同突变类型的PFS和OS均无差别。

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