雷帕霉素对顺铂作用下人肺腺癌A549及耐药A549/DDP细胞增殖、侵袭、黏附及自噬凋亡的影响

 目的:研究雷帕霉素（Rap）对顺铂（DDP）作用下人肺腺癌A549及耐药A549/DDP 细胞增殖、迁移、黏附及其自噬凋亡的影响。方法: 培养人肺腺癌A549及耐药A549/DDP细胞株，利用MTT方法分别检测Rap和DDP单独与联合作用对A549及耐药A549/DDP细胞增殖抑制率的影响；Transwell方法检测Rap和DDP单独与联合作用对A549及耐药A549/DDP细胞体外侵袭能力的影响；黏附实验检测Rap和DDP单独与联合作用对A549及耐药A549/DDP细胞体外侵袭能力的影响；流式细胞术检测Rap和DDP单独与联合作用对A549及耐药A549/DDP细胞凋亡的影响；Western blotting检测Rap和DDP单独与联合作用对A549及耐药A549/DDP细胞自噬标志蛋白beclin-1和LC3表达的影响。结果: 与Rap或DDP单独作用组相比，Rap和DDP联合作用能够同时显著抑制人肺腺癌A549及耐药A549/DDP细胞增殖、体外侵袭能力及细胞黏附能力，并能够促进细胞凋亡和自噬标志蛋白beclin-1和LC3的表达（均P＜0.05）。结论: Rap能够通过促进细胞自噬而增强DDP的作用，进而抑制人肺腺癌A549及耐药A549/DDP细胞的增殖、侵袭、黏附并促进细胞凋亡作用，具有协同作用。

Effect of rapamycin on proliferation,invasion, adhesion,apoptosis and autophagy of human lung adenocarcinoma A549 and resistant A549/DDP cells treated with cis-diamminedichloroplatinum

AIM: To study the effect of rapamycin (Rap) on the proliferation, invasion, adhesion, apoptosis and autophagy of human adenocarcinoma A549 and resistant A549/DDP cells treated with cis-diamminedichloroplatinum (DDP). METHODS: Human adenocarcinoma A549 and resistant A549/DDP cell lines were cultured. The inhibitory effects of Rap alone or combined with DDP on A549 and resistant A549/DDP cells were detected by MTT assay. The in vitroinvasion abilities of the 2 cell lines treated with Rap alone or combined with DDP were detected by Transwell methods. The in vitroadhesion abilities of the 2 cell lines treated with Rap alone or combined with DDP were detected by adhesion experiments. The apoptosis of A549 and resistant A549/DDP cells induced by Rap alone or combined with DDP was analyzed by flow cytometry. The cell autophagy marker proteins beclin-1 and LC3 in A549 and resistant A549/DDP cells treated with Rap alone or combined with DDP were detected by Western blotting.RESULTS: Compared with Rap or DDP alone group, the combination of Rap and DDP significantly inhibited the proliferation, invasion and adhesion of A549 and resistant A549/DDP cells in vitro, and promoted the cell apoptosis and autophagy marker proteins beclin-1 and LC3 expression (all P＜0.05).CONCLUSION: Rap enhances the effect of DDP through promoting the cell autophagy, thereby inhibiting the proliferation, invasion and adhesion of A549 and resistant A549/DDP cells and inducing the cell apoptosis with a synergistic effect.