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  • Title: MiR-196a promoted cell migration, invasion and the epithelial-mesenchymal transition by targeting HOXA5 in osteosarcoma.
    Author: Wang X, Zhang L, Zhang X, Xing C, Liu R, Zhang F.
    Journal: Cancer Biomark; 2020; 29(2):291-298. PubMed ID: 32675397.
    Abstract:
    INTRODUCTION: Osteosarcoma (OS), aggressive neoplasms of the bone, is the most common primary bone cancer in children. MiR-196a usually low expressed in several tumors and its functions in osteosarcoma still unclear. MATERIALS AND METHODS: Quantitative real-time polymerase chain reaction (qRT-PCR) was employed to assess the expression of miR-196a and the HOXA5. Cell metastasis and epithelial-mesenchymal transition (EMT) abilities were assessed using Transwell and western blot. The dual luciferase reporter assay was carried out to verify whether miR-196a directly targeted the 3'-untranslated region (UTR) of HOXA5 mRNA. RESULTS: MiR-196a was overexpressed and HOXA5 was low expressed in osteosarcoma versus the non-tumor tissues and normal cell lines. Upregulation of miR-196a or downregulation of HOXA5 was associated with worse outcome of osteosarcoma patients. MiR-196a enhanced cell migration, invasion and EMT by regulating the expression of HOXA5 through directly targeting the 3'-UTR of its mRNA in osteosarcoma. HOXA5 partially reversed roles of miR-196a on metastasis and EMT in osteosarcoma. CONCLUSIONS: MiR-196a promoted cell metastasis and EMT by targeting the 3'-UTR of HOXA5 mRNA in osteosarcoma. The newly identified miR-196a/HOXA5 axis provides novel insight into the pathogenesis of osteosarcoma.
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