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Mir-208 promotes cell proliferation by repressing SOX6 expression in human esophageal squamous cell carcinoma

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journal contribution
posted on 10.07.2015, 10:50 by Shiqiu Xiong, H. Li, D. Zheng, B. Zhang, L. Liu, J. Ou, W. Chen, Y. Gu, J. Yang
Background: Esophageal squamous cell carcinoma (ESCC) is the major histological type of esophageal cancer in developing countries. The prognosis and survival rate of ESCC are very poor. Recently, microRNAs (miRNAs) have emerged as important regulators of cancer cell biological processes. To better understanding the molecular mechanisms by which they regulate the behavior of cancer cells is needed. Methods: The expression of miR-208 was examined in ESCC cell lines and tumor tissues by real-time PCR. Proliferation capability of ESCC cells upon regulation of miR-208 expression was detected by MTT assay, colony formation assay, anchorage-independent growth ability assay and flow cytometry analysis. The target of miR-208 was determined by western blotting analysis, luciferase reporter assay and real-time PCR. Results: miR-208 was upregulated in ESCC cell lines and tissues. Overexpression of miR-208 in ESCC cells increased cell proliferation, tumorigenicity and cell cycle progression, whereas inhibition of miR-208 reduced cells proliferation, tumorigenicity and cell cycle progression. Additionally, SOX6 was identified as a direct target of miR-208. Ectopic expression of miR-208 led to downregulation of SOX6 protein, which resulted in the downregulation of p21, upregulation of cyclin D1 and phosphorylation of Rb. Conclusions: These results suggest that miR-208 represents a potential onco-miR and participates in ESCC carcinogenesis by suppressing SOX6 expression.

History

Citation

Journal of Translational Medicine, 2014, 12 : 196

Author affiliation

/Organisation/COLLEGE OF MEDICINE, BIOLOGICAL SCIENCES AND PSYCHOLOGY/School of Biological Sciences/Department of Biochemistry

Version

VoR (Version of Record)

Published in

Journal of Translational Medicine

Publisher

BioMed Central

issn

1479-5876

Acceptance date

01/07/2014

Copyright date

2014

Available date

10/07/2015

Publisher version

http://www.translational-medicine.com/content/12/1/196

Language

en

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