肾癌抑制性消减文库构建及差异表达基因鉴定

目的：应用抑制性消减杂交技术筛选人肾癌差异表达基因。方法：以786-0和HK-2为消减杂交对象构建人肾癌抑制性消减文库,挑选阳性克隆进行测序及Genbank BLAST分析。结果：文库包含362个有插入片段的阳性克隆,随机分析50个克隆,其中2个为新基因,另48个源于36个已知基因,这些差异表达基因与肿瘤细胞的转录、翻译、增殖、凋亡、代谢、信号转导、血管新生、膜受体表达异常等有关。结论：该文库质量可靠,筛选出包括低峰度和新基因在内的肾癌差异表达基因,为进一步研究肾癌发生、发展机制奠定了基础。

Construction and screening of suppression subtractive hybridization library of renal cell carcinoma

OBJECTIVE: To construct and screen the suppression subtractive hybridization (SSH) library of human renal cell carcinoma (RCC). METHODS: Poly A(+) RNA was isolated from RCC lines 786-O (tester) and renal cell (RC) lines HK-2 (driver), respectively. SSH procedure was performed according to the protocol of the PCR-Select cDNA Subtraction Kit (Clontech), and PCR products were cloned into pT-Adv vector and transformed E. coli TOP10F'. All positive clones picked out were digested and some of which were sequenced. RESULTS: The SSH library contained 362 clones with SSH cDNA fragments distributed mainly from 0.3 to 0.9 kb. Among 50 clones sequenced randomly, 2 represented unknown genes and the other 48 derived from 36 known genes. CONCLUSION: The quality of the SSH library of human RCC is reliable and its construction is the basis for further screening differentially expressed genes of RCC.