低氧诱导对人肝癌SMMC7721细胞生物学行为的影响

目的研究低氧对体外培养的人肝癌细胞株SMMC7721增殖、细胞周期、凋亡和黏附、迁移能力的影响,探讨其中可能存在的分子机制.方法通过氯化钴诱导人肝癌SMMC7721细胞低氧,MTT法、流式细胞术、细胞黏附试验、transwell小室迁移实验观察低氧对肝癌细胞增殖、凋亡和细胞周期以及细胞黏附和迁移能力的影响;采用RT-PCR和免疫细胞化学方法检测低氧对细胞缺氧诱导因子-1α（HIF-1α）、血管内皮生长因子（VEGF）、基质金属蛋白酶2（MMP2）mRNA和蛋白表达的影响.结果 MTT法显示氯化钴诱导的低氧对肝癌细胞生长起抑制作用;低氧24 h,流式细胞术显示细胞凋亡、坏死增加,细胞周期G0/G1期、S期细胞比例减少,G2/M期比例增加;黏附试验显示低氧后细胞黏附力增强（P〈0.01）,transwell小室实验显示,低氧后细胞迁移能力较常氧时明显增加（P〈0.05）;RT-PCR和细胞免疫化学检测显示低氧条件下HIF-1α、VEGF、MMP2的mRNA和蛋白表达均较常氧时增加（P〈0.05）.结论氯化钴诱导低氧可抑制SMMC7721细胞增殖,使细胞周期阻滞于G2/M期,细胞凋亡、坏死增加,同时细胞黏附、迁移能力增强;低氧时HIF-1αmRNA和蛋白表达增加,并通过调节及其下游靶基因VEGF、MMP2的表达参与了这一生物学行为的转变.

Influence of Hypoxia on Hepatoma Carcinoma Cell Line SMMC7721 in Vitro

Objective To investigate the effect of hypoxia on human hepatoma carcinoma cell line SMMC7721 cultured in vitro.and to explore the possible molecular mechanism.Methods The chemical method using COCl2 to induce hypoxia environment of SMMC7721 cell was performed.The effect of hypoxia on cell growth,cycle and apoptosis,and adhesion and migration ability were detected by MTT assay,flow cytometry,cell adhesion test,and transwell chamber methods,respectively.RT-PCR and immunocytochemistry methods were used to det...