酪氨酸激酶抑制剂BGJ398对人肝癌Huh-7细胞增殖、凋亡及迁移的影响及其作用机制

Effect of tyrosine kinase inhibitor BGJ398 on proliferation,apoptosis and migration of human hepatocellular cancer Huh-7 cells and its mechanism

目的 评价酪氨酸激酶抑制剂BGJ398对人肝癌Huh-7细胞增殖、凋亡和迁移的影响,并探讨其作用机制。方法 MTT法检测10种酪氨酸激酶抑制剂对Huh-7细胞存活的影响,并分别采用单靶点动力学公式和双相动力学公式分析Huh-7细胞对BGJ398的敏感性。将10、30和90 nmol/L BGJ398分别加入Huh-7细胞,同时设对照组(不加药物),37℃培养24 h,流式细胞术检测BGJ398对Huh-7细胞凋亡和周期的影响;划痕试验检测BGJ398对Huh-7细胞迁移能力的影响;Western blot法检测BGJ398对Huh-7细胞多条通路相关蛋白表达水平的影响。结果 10种酪氨酸激酶抑制剂均可抑制Huh-7细胞增殖,其中Huh-7细胞对BGJ398最敏感,IC50为(0.020±0.013)μmol/L;Huh-7细胞对BGJ398的反应由两相组成,其中F1相占92.8%(Kd1为36 nmol/L),F2相占7.2%(Kd2>1 000μmol/L)。与对照组比较,30和90 nmol/L BGJ398组Huh-7细胞凋亡率及处于G1期的细胞百分比均显著上升(t=-6.407~-4.459,P均<0.05),10、30和90 nmol/L BGJ398组处于S期的细胞百分比明显减少(t分别为2.982、7.859和12.425,P均<0.05);划痕24及48 h后,30、90 nmol/L BGJ398组划痕面积均明显减小(t=5.376~18.197,P均<0.05);30、90 nmol/L BGJ398组磷酸化成纤维细胞生长因子受体(fibroblast growth factor receptor,FGFR)及磷酸化胞外信号调节激酶1/2(Erk1/2)蛋白的表达水平均明显下降(t=4.015~6.729,P均<0.01)。结论 BGJ398能够抑制人肝癌Huh-7细胞增殖和迁移,诱导细胞凋亡和细胞周期阻滞,可能是通过抑制FGFR磷酸化及MAPK信号通路实现的,BGJ398有望成为治疗肝癌的潜在药物。

Objective To evaluate the effect of tyrosine kinase inhibitor BGJ398 on the proliferation,apoptosis and migration of human hepatocellular cancer Huh-7 cells and explore the mechanism.Methods The effects of 10 tyrosine kinase inhibitors on the survival of Huh-7 cells were detected by MTT assay,and the sensitivity of Huh-7 cells to BGJ398 was analyzed by single-target kinetic equation and biphasic kinetic equation respectively.Huh-7 cells were added with 10,30 and 90 nmol/L BGJ398 respectively,and the control group(without drugs)was set.The effects of BGJ398 on the apoptosis and cell cycle of Huh-7 cells were detected by flow cytometry after culturing at 37℃for 24 h,the effect on the migration ability was detected by wound healing assay and the effect on the expression of multiple pathway-related proteins was detected by Western blot.Results All of 10 tyrosine kinase inhibitors inhibited the proliferation of Huh-7 cells,among which Huh-7 cells were most sensitive to BGJ398 and the IC_(50)was(0.020±0.013)μmol/L;The response of Huh-7 cells to BGJ398 was composed of two phases with F_1 accounted for 92.8%(K_(d1)was 36 nmol/L)and F_2 accounted for 7.2%(K_(d2)>1000μmol/L).Compared with the control group,the apoptosis rate and the percentage of Huh-7 cells in G1 phase increased significantly in 30 and 90 nmol/L BGJ398 groups(t=-6.407~-4.459,each P<0.05),while the percentage of Huh-7 cells in S phase decreased significantly in 10,30 and 90 nmol/L BGJ398 groups(t=2.982,7.859 and 12.425,respectively,each P<0.05);After 24 and 48 h of scratching,the scratch area of 30 and 90 nmol/L BGJ398groups decreased significantly(t=5.376~18.197,each P<0.05);The expression levels of phosphorylated fibroblast growth factor receptor(FGFR)and phosphorylated extracellular signal-regulated kinase 1/2(Erk1/2)protein decreased significantly in 30 and 90 nmol/L BGJ398 groups(t=4.015~6.729,each P<0.01).Conclusion BGJ398 can inhibit the proliferation and migration of human hepatocellular cancer Huh-7 cells,induce apoptosis and cell cycle arrest,which might be achieved by inhibiting FGFR phosphorylation and MAPK signaling pathway.BGJ398 is expected to be a potential agent for the treatment of hepatocellular cancer.