摘要
应用基因芯片技术初步筛选人大肠癌细胞辐射敏感相关基因。培养2种不同辐射敏感性的人大肠癌细胞LOVO和SW480,收集细胞至少达到107数量级,提取细胞总RNA,采用人全基因组表达谱芯片获得该两株细胞的基因表达谱,分析比较两者之间基因表达的差异。1、LOVO细胞组检出基因16882个,SW480细胞组检出基因17114个。2、在2倍以上差异表达基因中筛选出上调基因908个,下调基因1312个。上调基因中包括Fas基因、NFkB基因等,下调基因中包括Caspas6基因、RAD21基因等,已有研究证明与辐射敏感相关。3、LOVO细胞中高表达的基因主要有CEACAM5、THBS1、SERPINE2、ARL7、HPGD,提示与辐射敏感相关;SW480细胞中高表达的基因主要有SCD、NQ01、LYZ、KRT20、ATP1B1,提示与辐射抵抗有关。1、大肠癌辐射敏感性的预测可以从基因水平来体现。2、表达谱基因芯片技术能快速、灵敏地预测大肠癌辐射敏感性,筛选大肠癌辐射敏感性相关基因。
The screening of radiosensitive genes of human colorectal cancer was made by gene chip. Two human colorectal cancer cell lines LOVO and SW480 were cultivated and the total RNA was extracted from at least 1×10^7cells. Then the gene expression profiling was performed by HG- U133 Plus 2.0 Arrayand the differenceof gene expression has been analyzed. The results shows thatthere are 16882 genes expressed in LOVO cell and 17114 genes expressed in SW480 cell through gene expression profiling.It has been found that the genes with 2-fold expressed differentially include 908 genes up-regulated and 1312 genes down-regulated. The same genes, such as Fas and NFkB which is up-regulated, Caspas6,and RAD21 which is down-regulated, have been proved to be related to radiosensitivity. The genes with high expression level including CEACAM5, THBS1, SERPINE2, ARL7, HPGD in LOVO cell may also be related to the radiosensitivity. And the genes with high expression level including SCD, NQ01, LYZ, KRT20, ATP1B1 in SW480 cell may be related to the radioresistance of human colorectal cancer. It could be concluded thatthe radiosensitivity of colorectal cancer can be reflected from gene and protein expression level. And gene expression profiling is a fast and sensitive tool to predict the radiosensitivity and screen radiosensitive genes of colorectal cancer.
出处
《辐射研究与辐射工艺学报》
CAS
CSCD
北大核心
2007年第4期252-256,共5页
Journal of Radiation Research and Radiation Processing
基金
国家卫生部科研基金(WKJ2006-2-027)资助
关键词
大肠癌细胞
辐射敏感性
基因芯片
Colorectal cancer cell, Radiosensitivity, Gene chip
