全基因组寡核苷酸表达谱筛选哈萨克族食管癌相关靶基因

目的 筛选哈萨克族食管癌与正常食管黏膜的差异表达基因.方法 新鲜标本取自哈萨克族食管鳞癌患者.采用RNA保护技术保护组织标本,分离癌组织、正常食管黏膜组织标本,提取RNA,线性扩增获得足量cRNA,利用基因芯片分别检测癌组织和正常食管黏膜组织基因表达谱,并利用生物信息学方法对检测结果进行分析.结果 癌组织和正常食管黏膜组织比较差异10倍以上共有170个基因,其中表达上调(信号比的对数值>3)有39个,表达下调(信号比的对数值<-3)有131个.表达异常的基因与细胞周期调节、细胞凋亡、细胞骨架、细胞外基质、细胞内信号传递、蛋白质的翻译合成及免疫功能等相关.结论 利用全基因组寡核苷酸芯片可准确、高效地筛选出哈萨克族食管癌相关的候选靶基因170个,这些基因与哈萨克族食管癌的发生、发展有关.

Screening of target genes in esophageal squamous cell cancer in Kazakh by oligonucleotide microarray

Objective To screen the differentially expressed genes in esophageal squamous cell cancer (ESCC) and normal tissue of esophageal mucosa in Kazakh. Methods RNA was extracted from the ESCC sections in Kazakh patients, and was amplified to obtain cRNA. The gene expression profiles in ESCC and normal tissue of esophageal mucosa were detected by HG-U133 Plus 2.0 gene chip. The results were analyzed by bioinfor-matics. Results One hundred and seventy differentially expressed genes in ESCC and normal tissue of esophageal mucosa were found, with a difference of more than 10 times in expression levels. Of the 170 genes, 39 were up-regulated (signal log ratio > 3 ) and 131 down-regulated (signal log ratio < - 3). These factors such as cell cycle regulation, apoptosis, cytoskeleton; extracellular matrix, intracellular signal transduction, protein translation and synthesis, and immunological functions were correlated with the genes with abnormal expression. Conclusion The use of oligonucleotide microarray accurately and efficiently screen the 170 target genes in ESCC in Kazakh. It is suggested that these genes may be related to the carcinogenesis and development of ESCC in Kazakh.