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MicroRNA-135b Acts As a Tumor Promoter by Targeting the Hypoxia-inducible Factor Pathway in Genetically Defined Mouse Model of Head and Neck Squamous Cell Carcinoma

Overview
Journal Cancer Lett
Specialty Oncology
Date 2013 Jan 24
PMID 23340180
Citations 48
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Abstract

Here in, we investigated the mechanism underlying overexpression of miR-135b in the human head and neck squamous cell carcinoma (HNSCC) cell lines and in the HNSCC mouse model. Exogenous expression of miR-135b in these cell lines increased cell proliferation, migration, and colony formation. Gene silencing analysis revealed that miR-135b affects a regulator that inhibits hypoxia-inducible factor (HIF). Increased miR-135b expression was positively correlated with HIF-1α expression and microvessel density in the HNSCC model. Thus, our data demonstrate that miR-135b acts as a tumor promoter by promoting cancer cell proliferation, colony formation, survival, and angiogenesis through activation of HIF-1α in HNSCC.

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