抑制PI_3 K/Akt信号通路对Ephrin-A1介导的肝癌细胞运动和侵袭能力的影响

目的 探讨PI_3K/Akt信号传导通路在Ephrin-A1介导的肝癌细胞侵袭、转移过程中的作用.方法 Western blot法检测Ephrin-A1/Fc融合蛋白作用人肝癌细胞系Huh-7细胞前后丝裂原激活的蛋白激酶(MAPK)和磷脂酰肌醇3激酶(PI_3K)信号分子的表达,利用LY294002特异性的阻断PI_3K/Akt信号通路后,检测细胞运动能力、细胞侵袭能力的变化.结果 Ephrin-A1/Fc融合蛋白作用后p-Akt磷酸化蛋白的表达与对照组比较明显上升(t=4.564,P＜0.05),PI_3K/Akt信号通路可能为Ephrin-A1/EphA1作用的下游信号传导通路;LY294002明显抑制Ephrin-A1/Fc融合蛋白对Huh7细胞中PI_3K/Akt信号通路的激活,p-Akt磷酸化蛋白的含量与对照组比较明显减少(P＜0.05);Ephrin-A1介导肝癌细胞的运动能力及侵袭能力明显受到抑制(P＜0.05). 结论 PI_3K/Akt信号通路在Ephrin-A1介导的肝癌细胞侵袭、转移过程中起重要的作用.

PI_3 K/Akt signal effects Ephrin-A1 mediated malignancy of HCC cells

Objective To investigate the role of PI_3 K/Akt signal pathway in Ephrin-Al gene mediated invasion,metastasis of Huh-7 cells.Methods Western blot was used to test the protein expression of phosphatidylinositol 3-kinase(PI_3 K)and mitogen-activated protein kinase(MAPK)after Huh-7 cells were treated with Ephrin-A1/Fc fusion protein.According to the protein expression,LY294002 was used to block PI_3 K/Akt pathway specifically,then p-Akt protein expression,mobility and invasive ability of Huh-7 cells were examined.Results In Huh-7 cells actived by Ephrin-Al/Fc fusion protein,p-Akt expression was higher than that in control group(t=4.564,P＜0.05),but there was no difference of p-p38MAPK expression between Ephrin-Al/Fc fusion protein group and IgG/Fc fusion protein group(P＞0.05).PI_3 K/Akt pathway was specifically blocked by LY294002,the p-Akt protein expression decreased in Huh-7 cells,and the mobility and invasive ability mediated by Ephrin-Al in Huh-7 cells decreased(P＜0.05).Conclusions PI_3 K/Akt pathway effects an important role in mobility and invasive ability of Huh-7 cells mediated by Ephrin-A1.