硼替佐米或联合三氧化二砷诱导HL-60细胞凋亡实验研究

目的 探讨硼替佐米单独或联合三氧化二砷对HL-60细胞凋亡的影响.方法 不同浓度硼替佐米、三氧化二砷处理细胞12～48 h,采用MTT比色法检测细胞增殖活性;DNA凝胶电泳、细胞形态学观察、流式细胞仪检测细胞凋亡.结果 10～50 nmol/L硼替佐米可有效抑制HL-60细胞增殖,并诱导其发生凋亡.其中10nmol/L剂量处理12 h,即有细胞凋亡发生,延长作用时间或增加药物剂量,细胞凋亡率明显增加.选择15 μmol/L三氧化二砷与10nmol/L硼替佐米联合应用,可见HL-60细胞凋亡率比两种药物单独使用时显著增加.结论 硼替佐米对HL-60细胞存在时间和剂量依赖性的细胞凋亡效应,与三氧化二砷联合具有明显的协同作用.

HL-60 cell apoptosis induced by bortezomib alone or in combination with arsenic trioxide in vitro

OBJECTIVE: To investigate the effect of bortezomib alone and in combination with arsenic trioxide on apoptosis of HL-60 cells. METHODS: HL-60 cells were treated with bortezomib alone or in combination with arsenic trioxide for 12 to 48 h and the cell proliferation was analyzed with MTT assay, and cell apoptosis detected by DNA gel electrophoresis, fluorescence microscopy and flow cytometry. RESULTS: At the concentrations of 10 to 50 nmol/L, bortezomib effectively inhibited HL-60 cell proliferation, and induced cell apoptosis. A 12-hour bortezomib treatment at 10 nmol/L was sufficient to induce cell apoptosis, and prolonged treatment or increased concentration significantly increased HL-60 cell apoptotic rate. Combined treatment of the cells with bortezomib (10 nmol/L) and arsenic trioxide (15 micromol/L) resulted in an even higher cell apoptosis rate than that induced by the respective agent alone. CONCLUSION: Bortezomib can induce HL-60 cell apoptosis in a time- and dose-dependent manner, and a synergistic effect can be observed of bortezomib and arsenic trioxide in apoptosis induction.