Affiliations: [a] Department of Clinical Laboratory, Jinan City People’s Hospital, Jinan People’s Hospital Affiliated to Shandong First Medical University, Jinan, Shangdong, China | [b] Department of Clinical Laboratory, Yantaishan Hospital, Yantai, Shangdong, China | [c] Department of Infectious Diseases, The People’s Hospital of Zhangqiu Area, Jinan, Shangdong, China | [d] Department of Nursing, The People’s Hospital of Zhangqiu Area, Jinan, Shangdong, China | [e] Department of Clinical Laboratory, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, China
Correspondence:
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Corresponding author: Fang Zhang, Department of Clinical Laboratory, Jinan Central Hospital, Cheeloo College of Medicine, Shandong University, 105 Jiefang Road, Lixia District, Jinan, Shandong 250013, China. Tel.: +86 531 55739999; E-mail: wutuibacang0026@163.com.
Note: [1] Xiaoli Wang and Lili Zhang contributed equally to this work.
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.
