Wang PY, Sun YX, Zhang S, Pang M, Zhang HH, Gao SY, Zhang C, Lv CJ, Xie SY. Let-7c inhibits A549 cell proliferation through oncogenic TRIB2 related factors.
FEBS Lett 2013;
587:2675-81. [PMID:
23850892 DOI:
10.1016/j.febslet.2013.07.004]
[Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 07/01/2013] [Accepted: 07/01/2013] [Indexed: 01/15/2023]
Abstract
MicroRNAs have tumor suppressive or oncogenic roles in carcinogenesis. This study aimed to investigate the mechanism of let-7c in suppressing lung cancer cell proliferation. First, let-7c was revealed to be able to inhibit lung adenocarcinoma cell proliferation significantly. TRIB2 was further demonstrated to be a novel target and negatively regulated by let-7c. As downstream signals of TRIB2, the activities of C/EBP-α and phosphorylated p38MAPK were increased obviously in let-7c-treated cells compared with controls. Our results demonstrate that, through regulating the expression of TRIB2 and its downstream factors, let-7c can effectively inhibit A549 cell proliferation in vitro and in vivo.
Collapse