MTA1基因表达与人骨肉瘤细胞浸润和转移的关系(英文)

Relationship between the Expression of MTA1 Gene and Invasion and Metastasis of Human Osteosarcoma Cells

目的比较MTA1基因在人骨肉瘤细胞高低转移株的表达水平,探讨MTA1表达与骨肉瘤细胞浸润和转移潜能的相关性。方法采用半定量逆转录聚合酶链反应(RT-PCR)检测MG-63骨肉瘤细胞高低转移株MTA1的表达情况,用Boyden小室体外浸袭实验检测两株MG-63细胞的体外侵袭力;用脂质体介导的MTA1基因转染MG-63低转移株细胞,通过RT-PCR检测MTA1表达; Boyden小室体外侵袭实验检测转染前后细胞侵袭力的变化。结果 RT-PCR结果显示MTA1在MG-63低转移细胞株中表达水平低(1．32),在高转移细胞株中表达水平高(6．27,P<0．05); Boyden小室体外侵袭实验显示MG-63高转移株细胞体外侵袭力强,其穿膜细胞相对百分率为(46．3±2．4)％,低转移株细胞体外侵袭力较弱,其穿膜细胞相对百分率为(12．6±1．1)％,两者差异有显著性意义(P<0．05);转染MTA1基因后,低转移细胞株转移潜能较未转染细胞明显增高。结论 MTA1与人骨肉瘤细胞转移潜能有密切关系;MTA1对肿瘤转移的作用机制以及作为干预肿瘤转移靶基因的可能性值得进一步探讨。

Objective： To compare the expression level of metastasis associated-1 （MTA1） in the higher and lower metastasis sublines of human osteosarcoma cells （MG63）, and to investigate the relationship between the expression level of MTA1-EGFP and in vitro invasion and metastasis of human osteosarcoma cells. Methods： The expression level of MTA1 in two sublines of MG63 cells was detected by semi-quantitative RT-PCR, and cell invasion assay and cell proliferation assay were used to evaluate the invasive capacity in vitro in two sublines. The lower metastasis line of MG-63 cells were transfected with MTA1-EGFP full-length cDNA expression plasmid by lipofectamine. The changes of the MTA1-EGFP expression and in vitro invasion potential were measured after transfection. Results： M8 subline expressed significantly higher level of MTA1 than that of M6 subline by RT-PCR. The invasive potentials of low metastasis MG63 cell line were increased after MTA1 gene transfection. Conclusion： There may be a relationship between MTA1 and invasive potentials of human osteosarcoma cells, and MTA1 may play a role in the molecular mechanism of tumor metastases and be a potential target for gene therapy of osteosarcoma. Further studies of MTA1 in human ostersarcoma cell metastasis are needed.