• J Formos Med Assoc · Oct 2017

    Downregulation of miR-1 enhances tumorigenicity and invasiveness in oral squamous cell carcinomas.

    • Chih-Yu Peng, Yi-Wen Liao, Ming-Yi Lu, Chuan-Hang Yu, Cheng-Chia Yu, and Ming-Yung Chou.
    • School of Dentistry, Chung Shan Medical University, Taichung, Taiwan; Department of Dentistry, Chung Shan Medical University Hospital, Taichung, Taiwan.
    • J Formos Med Assoc. 2017 Oct 1; 116 (10): 782-789.

    Background/PurposeCumulative evidence suggest that microRNAs (miRNAs) function as biosignatures of oral squamous cell carcinomas (OSCC). However, the functional roles of miR-1 as well as its downstream targets in the regulation of tumorigenicity in OSCC remain unclear.MethodsmiRNAs RT-PCR analysis was performed to identify miR-1 as a putative candidate on mediating invasiveness of OSCC cells. Consequently, we elucidated the tumorigenicity of OSCC cells with miR-1 downregulation or overexpression, respectively. Finally, miR-1 on OSCC tumor tissues was examined.ResultsmiR-1 levels were significantly downregulated in the malignant OSCC cells. Overexpression of miR-1 significantly reduced migration/invasiveness of OSCC cells. In addition, overexpression of miR-1 decreased cancer stem cells properties. Conversely, downregulation of miR-1 promotes migration and invasiveness in OSCC cells. We have shown that miR-1 is able to target Slug, suppressing their expression. Clinically, lower miR-1 expression was found in patients with advanced nodal metastasis OSCC.ConclusionmiR-1 as novel biosignatures in OSCC lymph node metastatic patients, supporting the development of novel strategies for OSCC treatment.Copyright © 2017. Published by Elsevier B.V.

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