Bcl-2基因反义核酸增强三氧化二砷对NB4细胞凋亡效应

目的:研究和探索bcl-2基因反义核酸(bcl-2ASODN)是否能提高三氧化二砷(As₂O₃)对NB4白血病细胞的凋亡效应。方法:采用微量细胞培养的方法,观察反义核酸、砷剂单独以及反义核酸、砷剂联合培养NB4细胞的生物效应和凋亡形态变化;用免疫组化的方法,结合流式细胞技术,测定NB4细胞的DNA和Bcl-2蛋白的变化。结果:As₂O₃(0.25μmol/L)+bcl-2ASODN(10.0μmol/L)联合诱导NB4细胞凋亡作用显著强于单用As₂O₃(0.25μmol/L)或bcl-2ASODN(10.0μmol/L)(P＜0.01)。流式细胞仪检测显示,联合用药Bcl-2蛋白表达亦明显少于反义核酸、砷剂单独给药组(P＜0.01)。结论:bcl-2基因反义核酸能明显提高和显著增强As₂O₃对NB4白血病细胞的致凋亡效应。

The antisense phosphorothioate oligodeoxynucleotides of bcl-2 oncogene enhances the apoptotic effect of As_2O_3 on NB4 leukemic cells

AIM: To study and explore whether the antisense phosphorothioate oligodeoxynucleotides (ASODN) of bcl-2 oncogene would increase the apoptotic effect of As₂O₃ on NB4 leukemic cells. METHODS: The biological and morphological changes in NB4 cells from microculture with As₂O₃, bcl-2 ASODN or both were observed. The changes in DNA content and Bcl-2 protein of NB4 cells from microculture with As₂O₃, bcl-2 ASODN or both were determined by tissue chemistry and flowcytometry. RESULTS: There was much more apoptotic effect of As₂O₃ on NB4 cells while it combined with bcl- 2 ASODN (ASODN 10.0 μmol/L+ As₂O₃ 0.25 μmol/L) than alone(ASODN 10.0 μmol/L or As₂O₃ 0.25μmol/L),and so did inhibitory effect of Bcl-2 protein expression by flow cytometry. CONCLUSION:The bcl-2 ASODN can enhance the apoptotic effect of As₂O₃ on NB4 leukemic cells.