Gab2在人骨肉瘤细胞U2-OS中的表达及意义

目的:探讨Grb2协同结合蛋白2(Gab2)在人骨肉瘤细胞系中的表达及其与人骨肉瘤细胞侵袭转移的关系。方法:应用小RNA干扰技术,将合成的小RNA干扰质粒转染给人骨肉瘤U2-OS细胞,采用Western blotting和RT-PCR法检测转染后Gab2的蛋白和mRNA表达水平;体外细胞趋化运动实验和侵袭实验检测细胞的迁移和侵袭能力。结果:Gab2在人骨肉瘤U2-OS细胞系中高表达,且转染Gab2 siRNA后的细胞(Si Gab2/U2-OS)中Gab2蛋白及mRNA的表达水平低于转染scramble siRNA细胞(Scr/U2-OS)和U2-OS;趋化运动实验发现在10μg/L表皮生长因子(EGF)的诱导下Si Gab2/U2-OS细胞的迁移能力较U2-OS和Scr/U2-OS细胞明显下降,差异有统计学意义(P0.01);Si Gab2/U2-OS细胞侵袭并穿透Matrigel膜基质的细胞数量均比Scr/U2-OS细胞和U2-OS细胞少,Si Gab2/U2-OS细胞的体外侵袭能力显著降低(P0.01)。结论:利用siRNA干扰技术降低Gab2的表达对人骨肉瘤U2-OS细胞的迁移和侵袭能力有明显的抑制作用。

Expression of Gab2 in human osteosarcoma U2-OS cells

AIM: To investigate the expression of Grb2-associated binding protein 2 (Gab2) in human osteosarcoma cells and its relationship with the invasion and metastases of human osteosarcoma cells. METHODS: The technique of small RNA interference was used to transfect human osteosarcoma U2-OS cell lines. Western blotting and RT-PCR were used to detect the protein and mRNA expression of Gab2 in transfected U2-OS cells. After transfection, through chemotaxis and invasion assays in vitro, the cell migration and invasion abilities were detected. RESULTS: After transfection, the expression of Gab2 at mRNA and protein levels in Gab2 siRNA transfected cells (SiGab2/U2-OS) was lower than that in scrambled siRNA transfected cells (Scr/U2-OS) and U2-OS cells. After stimulation with epidermal growth factor (EGF) at concentration of 10 μg/L, the migration SiGab2/U2-OS cells was significantly less than Scr/U2-OS cells and U2-OS cells (P<0.01). The number of invasion cells of SiGab2/U2-OS group was significantly lower than the other 2 control groups (P<0.01). CONCLUSION: Inhibition of Gab2 expression obviously attenuates the migration and invasion abilities of human osteosarcoma U2-OS cell line.