棉酚通过Akt/β-catenin通路抑制胃癌细胞迁移

Inhibitory effect of gossypol on migration of gastric carcinoma cell lines through Akt/β-catenin passway

目的探讨棉酚(gossypol)对胃癌细胞迁移能力的影响,并探讨相关机制。方法胃癌细胞经不同浓度棉酚处理后,MTT法检测细胞增殖能力,Transwell小室实验检测细胞迁移能力,Western blot法检测丝/苏氨酸激酶/β-链蛋白(Akt/β-catenin)信号通路活性及相关蛋白细胞周期蛋白D1(cyclin D1)、基质金属蛋白酶-2(MMP-2)、E-钙黏蛋白(Ecadherin)和波形蛋白(vimentin)的蛋白表达水平。结果MTT实验显示,棉酚对胃癌细胞具有增殖抑制作用,且随浓度增加而增大;Transwell小室实验显示棉酚对胃癌细胞迁移能力具有抑制作用;棉酚对胃癌细胞迁移能力的抑制率高于增殖抑制率;与对照组相比,棉酚可明显下调胃癌细胞的pAkt、β-catenin、cyclin D1、MMP-2和vimentin蛋白表达水平,明显上调E-cadherin蛋白表达水平。结论棉酚通过下调Akt/β-catenin通路活性抑制胃癌细胞迁移。

Aim To investigate the inhibitory effects of gossypol on migration in gastric carcinoma cell lines and its mechanisms. Methods Gastric carcinoma cells were treated with gossypol at different concentra-tions. The effects of gossypol on cells proliferation were measured using the MTT assay. The migration of gas-tric carcinoma cells was detected by transwell assay. The activation of Akt/β-catenin pathway and the ex-pressions of pathway related proteins （ p-Akt,β-cate-nin, cyclin D1, MMP-2, E-cadherin and vimentin ） were detected by Western blot. Results Gossypol treatment could significantly inhibit the proliferation of gastric carcinoma cells in a dose-dependent manner. Transwell assay showed that the migration ability of gastric carcinoma cells was significantly decreased. The inhibitory effect of gossypol on cells migration was more significant than the effect of gossypol on cells prolifera-tion. Compared with the control group, treatment with gossypol significantly suppressed the expressions of p-Akt,β-catenin, cyclin D1, MMP-2 and vimentin pro-tein, whereas the expression of E-cadherin was signifi-cantly up-regulated in gastric carcinoma cells in a dose-dependent manner. Conclusion These results demonstrate that gossypol represses cell migration of gastric carcinoma cells through the down-regulation of the activity of Akt/β-catenin pathway.