Abstract:
:Osteosarcoma is the most common type of malignant bone tumor in children and adolescents. Numerous patients are unable to be cured due to the development of resistance of the osteosarcoma cells to chemotherapeutic drugs. Therefore, reversion of drug resistance is urgently required for the treatment of osteosarcoma. Arsenic trioxide (As2O3) is an active ingredient in Traditional Chinese Medicine, but the therapeutic potential of As2O3 in osteosarcoma remains largely unexplored. The current study investigated the effects of As2O3 on MG63 osteosarcoma cells using a cell proliferation assay, flow cytometric analysis of the cell cycle and cell apoptosis, reverse transcription polymerase chain reaction to detect stathmin mRNA expression levels and western blot analysis to detect the stathmin protein expression levels. As2O3 and doxorubicin (ADM) combination treatment markedly inhibited cell proliferation in ADM-resistant MG63 (MG63/dox) osteosarcoma cells, clearly induced G2/M phase cell cycle arrest and increased the number of apoptotic MG63/dox cells. Furthermore, stathmin expression was found to be downregulated in MG63/dox cells and was sensitive to ADM treatment. Additional investigation revealed that the downregulation of stathmin expression in MG63/dox cells by stathmin small interfering RNA significantly enhanced the reversion of ADM resistance in MG63/dox by As2O3. The data indicated that As2O3 reversed ADM resistance in MG63/dox cells through downregulation of stathmin and may be a potential drug for the treatment of ADM-resistant osteosarcoma.
journal_name
Mol Med Repjournal_title
Molecular medicine reportsauthors
Feng T,Qiao G,Feng L,Qi W,Huang Y,Yao Y,Shen Zdoi
10.3892/mmr.2014.2618subject
Has Abstractpub_date
2014-12-01 00:00:00pages
2985-92issue
6eissn
1791-2997issn
1791-3004journal_volume
10pub_type
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