Abstract

背景与目的非小细胞肺癌(non-small cell lung cancer, NSCLC)是肺癌的主要类型,相关位点突变检测研究已经成为肺癌分子靶向治疗的热门方向,研究NSCLC肿瘤组织中动物微管相关蛋白4与间变性淋巴瘤激酶融合基因(echinodem microtubule associated protein like 4-Anaplastic lymphoma kinase, EML4-ALK)与表皮生长因子受体(epidermal growth factor receptor, EGFR)的基因突变状态,比较免疫组织化学(immunohistochemistry, IHC)与蝎形探针扩增阻滞突变系统(Scorpions amplification refractory mutation system, Scorpions ARMS)荧光定量PCR与荧光原位杂交(fluorescence in situ hybridization, FISH)检测EML4-ALK融合基因与EGFR基因突变的敏感性。方法应用IHC、ARMS荧光定量PCR及FISH技术检测85例NSCLC石蜡包埋肿瘤组织以及癌旁正常肺组织中EML4-ALK融合基因状态,并应用ARMS方法检测EGFR基因第18、19、20和21外显子突变状态。结果115例NSCLC中IHC显示32例有ALK(D5F3)表达,表达率为27.8%;ARMS检测27例存在EML4-ALK融合基因突变,突变检出率为23.5%;53例检出EGFR突变,突变率为46%。而FISH检测23例存在EML4-ALK融合基因突变,检出率为20%,稍低于ARMS检测结果,提示ARMS的敏感度更高。结论联合运用IHC/ARMS荧光定量PCR/FISH技术能够对EML4-ALK融合基因状态做出快速、准确评价。

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