Proliferation Characteristics of CD133+ Cell Population in Colorectal Cancer  

作　　者：于冬冬 张永红 邹游 覃吉超 李小兰 肖徽 陶德定 胡俊波 龚建平 

机构地区：[1]Department of General Surgery,Tongji Hospital,Tongji Medical College,Huazhong University of Science and Technology

出　　处：《Journal of Huazhong University of Science and Technology(Medical Sciences)》2010年第6期751-756,共6页华中科技大学学报（医学英德文版）

基　　金：supported by grants from973 program from Ministry of Science and Technology of China(No.2004CB518705,No.2009CB521802);the National Natural Sciences Foundation of China(Nos.30872472,30800569)

摘　　要：In this study,CD133+ subpopulations were isolated from 41 primary colorectal cancer tissues,the proliferation and cell cycle distribution of the cells were examined without in vitro expansion,and then compared to those of cell lines.The detection of CD133 in colorectal cancer tissues,isolation of CD133+ and CD133-epithelial subpopulations,Ki-67/DNA multiparameter assay and cell volume analysis were flow cytometrically conducted.The results showed that Ki-67 expression was correlated with CD133 level in primary cancer tissues,while cell cycle G 2 /M phase distribution or clinicopathological characteristics was not.In addition,the CD133+ cells showed larger cell volume and higher Ki-67 expression as compared with CD133-cells.But there was no statistically significant difference in G 2 /M phase distribution between the two subpopulations.Our results demonstrated that the CD133+ subpopulation in colorectal cancer tissue contained more actively cycling and proliferating cells,which was not correlated to clinicopathological factors but might contribute to tumor progression and poor clinical outcome.In this study,CD133+ subpopulations were isolated from 41 primary colorectal cancer tissues,the proliferation and cell cycle distribution of the cells were examined without in vitro expansion,and then compared to those of cell lines.The detection of CD133 in colorectal cancer tissues,isolation of CD133+ and CD133-epithelial subpopulations,Ki-67/DNA multiparameter assay and cell volume analysis were flow cytometrically conducted.The results showed that Ki-67 expression was correlated with CD133 level in primary cancer tissues,while cell cycle G 2 /M phase distribution or clinicopathological characteristics was not.In addition,the CD133+ cells showed larger cell volume and higher Ki-67 expression as compared with CD133-cells.But there was no statistically significant difference in G 2 /M phase distribution between the two subpopulations.Our results demonstrated that the CD133+ subpopulation in colorectal cancer tissue contained more actively cycling and proliferating cells,which was not correlated to clinicopathological factors but might contribute to tumor progression and poor clinical outcome.

关 键 词：CD133 cancer stem cell KI-67 cell cycle tumor heterogeneity colorectal cancer 

分 类 号：R735.3[医药卫生—肿瘤]