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BioMed Research International
Volume 2015 (2015), Article ID 365273, 10 pages
http://dx.doi.org/10.1155/2015/365273
Research Article

miR-125b Suppresses Proliferation and Invasion by Targeting MCL1 in Gastric Cancer

1Cancer Research Institute, Key Laboratory of Cancer Cellular and Molecular Pathology of Hunan Provincial University, University of South China, Hengyang 421001, China
2Department of Pathology, Shaoyang Medical College, Shaoyang 422000, China
3Graduate Department, University of South China, Hengyang 421001, China

Received 24 January 2015; Revised 8 May 2015; Accepted 18 May 2015

Academic Editor: Franco M. Buonaguro

Copyright © 2015 Shihua Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Understanding the molecular mechanisms underlying gastric cancer progression contributes to the development of novel targeted therapies. In this study, we found that the expression levels of miR-125b were strongly downregulated in gastric cancer and associated with clinical stage and the presence of lymph node metastases. Additionally, miR-125b could independently predict OS and DFS in gastric cancer. We further found that upregulation of miR-125b inhibited the proliferation and metastasis of gastric cancer cells in vitro and in vivo. miR-125b elicits these responses by directly targeting MCL1 (myeloid cell leukemia 1), which results in a marked reduction in MCL1 expression. Transfection of miR-125b sensitizes gastric cancer cells to 5-FU-induced apoptosis. By understanding the function and molecular mechanisms of miR-125b in gastric cancer, we may learn that miR-125b has the therapeutic potential to suppress gastric cancer progression and increase drug sensitivity to gastric cancer.