Journal
CELL PROLIFERATION
Volume 47, Issue 5, Pages 427-434Publisher
WILEY
DOI: 10.1111/cpr.12129
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ObjectivesOsteosarcoma (OS) is one of the most common primary malignant bone tumours of childhood and adolescence, and is characterized by high propensity for metastasis (specially to the lung), which is the main cause of death. However, molecular mechanisms underlying metastasis of OS are still poorly understood. Materials and methodsMetadherin (MTDH) was identified to be significantly upregulated in OS tissues that had metastasized compared to OS without metastasis, using a two-dimensional approach of electrophoresis, coupled with mass spectrometry. To understand the function of MTDH in OS, OS cell lines U2OS and SOSP-M were transfected with retroviral shRNA vector against MTDH. ResultsIt was found that metastatic propensity as well as cell proliferation were significantly reduced in both U2OS and SOSP-M. Migration and invasion of U2OS and SOSP-M cells were significantly lower after knock-down of MTDH. In addition, epithelial-mesenchymal transition (EMT) was reduced after knock-down of MTDH. Clinicopathologically, overexpression of MTDH was significantly associated with metastasis and poor survival of patients with OS. ConclusionTaken together, our results demonstrate that MTDH mediated metastasis of OS through regulating EMT. This could be an ideal therapeutic target against metastasis of OS.
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