Abstract
Objective To study the effect and mechanism of arsenic trioxide on the motility, metastasis and invasion of osteosarcoma in vitro. Methods Wound healing assay, migration assay, invasion assay and Western-blot were performed to study the effect of arsenic trioxide on metastasis of osteosarcoma. Results Through screening MNNG cell was selected to perform the following research. After treatment of As_2O_3, the ability of MNNC cell flattening and spreading along the edges of the wound was inhibited, and the number of MNNG cells with migration and invasion in As_2O_3 - treated group was significantly less than in control group. Arsenic trioxide treatment also resulted in down-regulation of MMP-9. Conclusion This study is the first to report the effectiveness of arsenic trioxide as an inhibitor of osteosarcoma migration and invasion and the mechanism may be down-regulation of MMP-9. Key words: Osteosarcoma; Arsenicals; Migration; Neoplasm invasivenes; Matrix metalloproteinase 9
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