HRM法检测肺癌EGFR基因突变

目的:HRM法检测中国不同区域肺癌患者的EGFR基因突变,统计突变类型间比率,为临床EGFR-TKI分子靶向治疗提供依据,并验证HRM法的临床适用性。方法:收集2010年手术切除的肺癌石蜡标本253例,HRM法检测EGFR基因突变情况,并用基因测序法进行验证。结果:在253例肺癌标本中,HRM法检测出EGFR基因突变率为42%,与基因测序法检测出的突变率40%无显著性差异,并检测出2例T790M突变,11例多点突变和2例E18新位点突变。将本实验中收集的东部地区和非东部地区肺癌患者的EGFR基因突变率相比较,无显著性差异。经实验验证,HRM法的灵敏度高于基因测序的灵敏度,且HRM法的特异性为100%。结论:HRM技术具有高灵敏度、高特异性和高准确率等特点,且比基因测序法更简单方便,成本更低,适合在临床开展。明确EGFR突变类型十分必要,可以为临床可否运用EGFR-TKI分子靶向治疗提供重要依据。本实验中收集的肺癌标本EGFR基因突变不存在地域差异。

EGFR gene mutant tested by high resolution melting method in lung cancer

Objective:To research EGFR-TKI molecular target therapy by detecting lung cancer EGFR gene mutant with high resolution melting method in different areas of China,and analyze the ratio of mutations type.Methods: To detect gene mutation of EGFR with HRM method in 253 surgical resection paraffin specimens of lung cancer and verify with gene sequencing method.Results: Mutation rate of EGFR gene was 42% in 253 cases with lung cance specimen using HRM method,while the mutation rate was 40% using sequencing method...