原发性肺癌染色体比较基因组杂交研究

Comparative genomic hybridization of primary lung cancer

目的分析原发性肺癌不同病理分类(鳞癌、腺癌和其他类型原发性肺癌)的遗传物质不平衡特征,为寻找肺癌发生发展相关基因、揭示肺癌发病机制提供线索。方法应用比较基因组杂交技术分析55例原发性肺癌患者肿瘤细胞染色体,按病理分类分为鳞状细胞癌组24例(鳞癌组),腺癌13例(腺癌组),其他组18例(腺鳞癌5例、细支气管肺泡癌8例、小细胞癌4例及非典型类癌1例),正常外周血淋巴细胞染色体DNA标本由20名健康男性志愿者提供。结果原发性肺癌鳞癌组常见染色体扩增区是2Q、5P、11Q、22Q,常见缺失区是1P、4Q、5Q、6Q、8P、9P、10Q、11P、13Q、18Q、21Q。腺癌组常见扩增区是5P、8Q、11Q,常见缺失区是10P、19。其他组中,腺鳞癌、肺泡细胞癌、小细胞癌等各有不同。结论原发性肺癌不同病理分型存在广泛的遗传物质不平衡现象,染色体基因扩增和缺失可能是不同类型肺癌发生发展的基础。

Objective To analyze the unbalanced state of hereditary material of squamous carcinoma, adenocarcinoma and other lung cancers. Methods Fifty-five patients suffered from lung cancer were included in this study, including 24 of squamous carcinoma, 13 of adenocarcinoma, 5 of adenosquanous carcinoma, 8 of bronchioalveolar carcinoma, 4 of small cell lung cancer and 1 of atypical carcinoma. The technology of comparative genomic hybridization （CGH） was used. The normal DNA was obtained from 20 healthy male volunteers. Results The common extension region of squamous carcinoma was 2q, 5p, 11q and 22q, and the common deletion region was lp, 4q, 5q, 6q, 8p, 9p, 10q, 11p, 13q, 18q and 21q. The common extension region of adenocarcinoma was 5p, 8q and 11q, and the common deletion region was 10p and 19. Conclusion The hereditary material of squamous carcinoma, adenoeareinoma and other lung cancers was unbalanced. The extension and deletion of ehromatosome were the base of the occurrence of different lung cancer.