Preliminary study of the differences of related gene expression in cancer stem cells of human breast cancer cell lines MCF-7 and MDA-MB-231
10.3760/cma.j.issn.1006-9801.2015.06.010
- VernacularTitle:人乳腺癌细胞系MCF-7、MDA-MB-231中肿瘤干细胞亚群相关基因表达差异的初步研究
- Author:
Zhengxiang HAN
;
Jie ZHANG
;
Jie XU
;
Xiuping DU
- Publication Type:Journal Article
- Keywords:
Tumor stem cells;
Breast neoplasms;
Cell line;
Mammosphere
- From:
Cancer Research and Clinic
2015;27(6):402-405
- CountryChina
- Language:Chinese
-
Abstract:
Objective To enrich breast cancer stem cells of breast cancer cell lines MCF-7 and MDA-MB-231 through culturing mammospheres,and to detect the expression differences of gene of breast cancer stem cells makers.Methods The MCF-7 and MDA-MB-231 cell lines were cultured by serum and serum-free medium.The proportion of CD44+/CD24-and CD133+ cancer stem cells was measured in cells derived from mammosphere cells or monolayer culture cells by flow cytometry,and the expression of CD44,CD24,CD133,ALDH3A1,ABCG2 and CXCR4 mRNA were detected by RT-PCR.Results Flow cytometry analysis indicated that the CD44+/CD24-low proportion of the MCF-7 mammosphere cells was higher than its adherent culture cells (P ＜ 0.05),and CD133+ proportion had no difference between them (P ＞ 0.05).However,the CD44+/CD24-/low proportion of the MDA-MB-231 mammosphere cells was lower than its adherent culture cells (P ＜ 0.05),while CD133+ proportion was significantly higher than its adherent cultured cells (P ＜ 0.05).RT-PCR analysis suggested that the expression of CD44 and ABCG2 increased obviously in MCF-7 microspheres (P＜ 0.05),and the expression of CD24,CD133,ALDH3A1 and CXCR4 had no significant difference between the mammosphere cells and adherent culture cells (P ＞ 0.05).The CD24,CD133,ABCG2,ALDH3A1 and CXCR4 increased obviously in MDA-MB-231 microspheres.On the contrary,the CD44 decreased (P ＜ 0.05).The expression of CD44 and CD24,CD133 and ALDH3A1 had significant differences in the microspheres of MCF-7 and MDA-MB-231 cells (P ＜ 0.05).Conclusion The related cancer stem cells gene expression is different in the microspheres of human breast cancer cell line,which indicates that the different subtypes of breast cancer may be derived from different origins.
