摘要
目的探讨中国人非小细胞肺癌表皮生长因子受体(EGFR)第18、19、21外显子基因突变状态。方法32例病理证实的非小细胞肺癌组织标本,通过模板DNA提取、定量和Touchdown PCR扩增EGFR exon 18、19、21序列,进行正、负链基因测序分析,并与10例非小细胞肺癌患者血液标本对照。结果32例非小细胞肺癌组织发现7例共9种突变,即已报道的5例19外显子缺失和未见报道的21exon T>G(L833V)及A>T(H835L)杂合性突变,另有2例内含子多态改变。中国人非小细胞肺癌突变率为28．1％(9／32),肺腺癌突变率为31．6％(6／19)。结论中国人非小细胞肺癌的EGFR突变率与已报道的亚洲人女性肺腺癌的突变率相似,但存在中国人自身新的突变位点(L833V和H835L)及内含子改变,该突变率与国内易瑞沙治疗非小细胞肺癌有效率基本吻合。
Objective To study the mutation patterns of epithelial growth factor receptor （EGFR） exon 18,19 and 21 in Chinese non-small-cell lung cancers （NSCLC）. Methods Somatic mutation in samples of 32 cases without Iressa-treatment were compared with that in 10 volunteers blood control. The mutations were identified for the forward and reverse sequence chains for the tyrosine kinase domain of the EGFR gene, followed by DNA template abstraction and Touchdown PCR. Results Nine types of mutation were found in sequences of 7 cases among the 32 non-small cell lung carcinoma tissues, namely, five reported mutation within exon 19, and two new heterozygous mutations, L833V and H835L within exon 21, and two intron polymorphism. These results showed a mutation rate of 9/32 （ 28. 1% ） in Chinese with NSCLC, and of 31.6% in lung adenocarcinomas. Conclusion EGFR mutation rate in Chinese with NSCLC is consistent with those of Asian women reported in the literature but new mutation points in Chinese were presented as L833V and H835L. The mutation rate is in concordance with release rate of NSCLC obtained by Gefitinib treatment in Chinese.
出处
《中华肿瘤杂志》
CAS
CSCD
北大核心
2006年第8期599-602,共4页
Chinese Journal of Oncology
