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MicroRNA-125a-5p modulates human cervical carcinoma proliferation and migration by targeting ABL2

Authors Qin X, Wan Y, Wang S, Xue M

Received 25 July 2015

Accepted for publication 17 August 2015

Published 24 December 2015 Volume 2016:10 Pages 71—79

DOI https://doi.org/10.2147/DDDT.S93104

Checked for plagiarism Yes

Review by Single anonymous peer review

Peer reviewer comments 4

Editor who approved publication: Prof. Dr. Wei Duan


Xian Qin,1 Yajun Wan,1 Saiying Wang,2 Min Xue1

1Department of Obstetrics and Gynecology, 2Department of Anesthesiology, Third Xiangya Hospital, Central South University, Changsha, People’s Republic of China

Background: In this study, we intended to understand the regulatory mechanisms of microRNA-125a-5p (miR-125a-5p) in human cervical carcinoma.
Methods: The gene expressions of miR-125a-5p in seven cervical carcinoma cell lines and 12 human cervical carcinoma samples were evaluated by quantitative real-time reverse transcription polymerase chain reaction. Ca-Ski and HeLa cells were transduced with lentivirus carrying miR-125a-5p mimics, and the effects of lentivirus-induced miR-125a-5p upregulation on cervical carcinoma proliferation and migration were examined by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide and transwell assays, respectively. In additional, HeLa cells were inoculated into null mice to evaluate the effect of miR-125a-5p upregulation on in vivo cervical carcinoma growth. The direct regulation of miR-125a-5p on its target gene, ABL proto-oncogene 2 (ABL2), in cervical carcinoma was evaluated by quantitative real-time reverse transcription polymerase chain reaction, Western blotting and luciferase reporter assays, respectively. ABL2 was then downregulated by small interfering RNA to examine its effect on cervical carcinoma proliferation and migration.
Results: miR-125a-5p was downregulated in both cervical carcinoma cell lines and human cervical carcinomas. In Ca-Ski and HeLa cells, lentivirus-mediated miR-125a-5p upregulation inhibited cancer proliferation and migration in vitro and cervical carcinoma transplantation in vivo. ABL2 was shown to be directly targeted by miR-125a-5p. In cervical carcinoma, ABL2 gene and protein levels were both downregulated by miR-125a-5p. Small interfering RNA-mediated ABL2 downregulation also had tumor-suppressive effects on cervical carcinoma proliferation and migration.
Conclusion: The molecular pathway of miR-125a-5p/ABL2 plays an important role in human cervical carcinoma. Targeting miR-125a-5p/ABL2 pathway may provide a new treatment strategy for patients with cervical carcinoma.

Keywords: cervical carcinoma, miR-125a-5p, ABL2, cancer proliferation, cancer migration

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