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MicroRNA‐1 (miR‐1) inhibits chordoma cell migration and invasion by targeting slug
Author(s) -
Osaka Eiji,
Yang Xiaoqian,
Shen Jacson K.,
Yang Pei,
Feng Yong,
Mankin Henry J.,
Hornicek Francis J.,
Duan Zhenfeng
Publication year - 2014
Publication title -
journal of orthopaedic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1002/jor.22632
Subject(s) - slug , chordoma , microrna , cancer research , biology , cell growth , transfection , western blot , cell culture , pathology , medicine , gene , genetics
Recent studies have revealed that expression of miRNA‐1 (miR‐1) is frequently down‐regulated in several cancer types including chordoma. Identifying and validating novel targets of miR‐1 is useful for understanding the roles of miR‐1 in chordoma. We aimed to further investigate the functions of miR‐1 in chordoma. Specifically, we assessed whether restoration of miR‐1 affects cell migration and invasion in chordoma, and focused on the miR‐1 potential target Slug gene. Migratory and invasive activities were assessed by wound healing and Matrigel invasion assays, respectively. Cell proliferation was determined by MTT assay. Slug expression was evaluated by Western blot, immunofluorescence, and immunohistochemistry. Restoration of miR‐1 expression suppressed the migratory and invasive activities of chordoma cells. Transfection of miR‐1 inhibited cell proliferation both time‐ and dose‐dependently in chordoma. MiR‐1 transfected cells showed inhibited Slug expression. Slug was over‐expressed in chordoma cell lines and advanced chordoma tissues. In conclusion, we have shown that miR‐1 directly targets the Slug gene in chordoma. Restoration of miR‐1 suppressed not only proliferation, but also migratory and invasive activities, and reduced the Slug expression in chordoma cells. These results collectively indicate that miR‐1/Slug pathway is a potential therapeutic target because of its crucial roles in chordoma cell growth and migration. © 2014 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 32:1075–1082, 2014.