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miR‐144 downregulation increases bladder cancer cell proliferation by targeting EZH 2 and regulating W nt signaling
Author(s) -
Guo Yuwen,
Ying Liang,
Tian Ye,
Yang Peiqian,
Zhu Yichen,
Wang Zhipeng,
Qiu Feng,
Lin Jun
Publication year - 2013
Publication title -
the febs journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.981
H-Index - 204
eISSN - 1742-4658
pISSN - 1742-464X
DOI - 10.1111/febs.12417
Subject(s) - wnt signaling pathway , cell growth , downregulation and upregulation , carcinogenesis , microrna , cancer research , biology , microbiology and biotechnology , cancer cell , cancer , cell , signal transduction , gene , genetics
micro RNA s (mi RNA s) have been proposed to be key regulators of diverse biological processes such as transcriptional regulation, cell growth and tumorigenesis. Wnt signaling plays an important role in the regulation of tumorigenesis and cancer progression. However, little is known about whether miR‐144 regulates bladder cancer cell proliferation by controlling Wnt signaling. In this study, we found that the miR‐144 expression level is significantly decreased in bladder cancer cell lines as well as in clinical cancer tissues. miR‐144 inhibitor blocks the expression of endogenous miR‐144 and promotes cancer cell proliferation, whereas miR‐144 overexpression is sufficient to inhibit cell proliferation. We further demonstrated that enhancer of zeste homolog 2 ( EZH2 ) is a target gene of miR‐144. miR‐144 downregulation relieves miR‐144‐mediated repression of EZH2, which results in activation of Wnt/β‐catenin signaling and subsequent cell proliferation. These data suggest miR‐144 is an essential mediator of bladder cancer cell proliferation, thus offering a new target for the development of therapeutic agents against bladder cancer.