[摘要] 目的：探讨AMP依赖的蛋白激酶α（AMP-activated protein kinase α，AMPKα）过表达对膀胱癌T24 细胞增殖、迁移、侵袭和EMT的作用及其机制。方法：建立AMPKα 过表达的膀胱癌T24 细胞株，依据转染质粒的不同分为T24 空白组、pc-DNA空载组和pc-AMPKα 组。用Wb检测T24 细胞AMPKα、EMT相关蛋白及EMT通路相关分子的表达水平，用Hoechst 染色法检测转染后T24 细胞的凋亡，CCK-8 法检测T24 细胞的增殖，细胞划痕愈合实验检测T24 细胞的迁移，Transwell 实验检测细胞的侵袭。结果：成功构建AMPKα 过表达的膀胱癌T24 细胞株。与T24 空白组和pc-DNA空载组比较，pc-AMPKα 组T24 细胞上皮钙黏蛋白水平显著升高（P<0.01）、波形蛋白和神经钙黏蛋白表达水平显著降低（均P<0.01），EMT通路相关信号分子P38、STAT3 活性受到显著抑制（均P<0.01），细胞发生明显凋亡、增殖能力显著减弱（均P<0.01）；T24 细胞迁移和侵袭能力显著降低（均P<0.01）。结论：AMPKα 过表达可使EMT通路相关分子活性受到抑制，使得膀胱癌T24 细胞发生明显凋亡、增殖受限并使其侵袭和迁移能力降低及伴随EMT的逆转。

[Abstract] Objective: To investigate the effect and mechanism of AMP-activated protein kinase α (AMPKα) over-expression on proliferation,migration, invasion and epithelial mesenchymal transition (EMT) of bladder cancer T24 cells. Methods: A bladder cancer T24 cells over-expressing AMPKα was established and divided into T24 group, pc-DNA group and pc-AMPKα group according to different plasmid transfection. Western blotting was used to verify the over-expression of AMPKα and detect the expressions of EMT-related proteins and EMT pathway-related molecules. Hoechst staining was used to detect apoptosis of transfected T24 cells. CCK8 assay was used to detect cell proliferation. Cell scratch test was used to detect cell migration. Transwell assay was used to detect cell invasion.Results: The bladder cancer cell line T24 over-expressing AMPKα was successfully constructed. Compared with the T24 group and the pc-DNA group, the level of E-cadherin in the pc-AMPKα group was significantly increased (P<0.01) while the levels of Vimentin and N-cadherin were significantly decreased (all P<0.01), and the activities of P38 and STAT3 which related to EMT pathway were significantly inhibited (all P<0.01); cell proliferation, migration and invasion were significantly decreased while cell apoptosis was obviously enhanced (all P<0.01). Conclusion: Over-expression of AMPKα can inhibit the activity of EMT pathway-related molecules, which leads to obvious apoptosis, limited proliferation, reduced invasion and migration of bladder cancer T24 cells, and accompanied by the reversal of EMT.

河南省医学科技攻关基金资助项目(No.201702119)