Effects of miRNA-25 on proliferation of human esophageal squamous-cell carcinoma cell line TE1
10.3969/j.issn.1000-4718.2015.11.009
- VernacularTitle:miRNA－25对人食管鳞状细胞癌细胞株TE1增殖的影响
- Author:
Wei ZHANG
;
Yonghui ZHOU
;
Yiqiang PANG
- Publication Type:Journal Article
- Keywords:
MicroRNA-25;
Human esophageal squamous-cell carcinoma cell line TE1;
Cell proliferation;
Cyclin E1;
Cyclin-dependent kinase 2
- From:
Chinese Journal of Pathophysiology
2015;(11):1979-1985
- CountryChina
- Language:Chinese
-
Abstract:
AIM:To investigate the effects and mechanisms of microRNA-25 (miRNA-25) on the proliferation of human esophageal squamous-cell carcinoma cell line TE1.METHODS: The abundance of miRNA-25 in different tis-sues was measured by RT-PCR.After silencing or over-expression of miRNA-25 with mimics or inhibitor in TE1 cells, the cell proliferation, cell cycle distribution and the expression of cyclin E1 and cyclin-dependent kinase 2 (CDK2) at mRNA and protein levels were measured by CCK-8 assay, BrdU detection, flow cytometry, RT-PCR and Western blot, respective-ly.RESULTS:miRNA-25 was prominent in esophageal mucosal tissue and highly expressed in TE1 cells (P<0.05).O-ver-expression of miRNA-25 increased TE1 cell proliferation, promoted the cell cycle progression and enhanced the en-trance of the cells into S phase (P<0.05).Inverse results were obtained after down-regulation of miRNA-25 (P<0.05). Furthermore, the expression of cyclin E1 and CDK2 at mRNA and protein levels was significantly increased after over-ex-pression of miRNA-25, but decreased after down-regulation of miRNA-25 (P<0.05).CONCLUSION: miRNA-25 en-hances cell cycle transition by increasing the expression of cyclin E1 and CDK2, thus accelerating TE1 cell proliferation. This study provides a novel mechanism by which miRNA-25 increases the proliferation of human esophageal squamous-cell carcinoma cell line TE1, suggesting that down-regulation of miRNA-25 may be a potential new therapeutic strategy for trea-ting esophageal squamous-cell carcinoma.
