摘要
目的观察三氧化二砷(ATO)与维生素K2(VK2)联合应用对HL-60细胞增殖的影响,并探讨其可能的作用机制。方法①用不同剂量ATO(0.0、0.5、1.0、2.0、4.0μmol/L)、VK2(0.0、2.5、5.0、10.0、20.0μmol/L)或联合用药(O.5μmol/LATO+2.5I,Lmol/LVK2、1.0μmol/LATO+5.0μmol/LVK2、2.0μmol/LATO+10.0μmol/LVK2、4.0μmol/LATO+20.0μmol/LVK2)作用HL-60细胞24、48、72h,通过CCK-8方法检测细胞的增殖活性,并计算ATO、VK:对HL-60细胞的半数抑制浓度(IC50)。②根据Ic。,选择联合用药浓度,分别计算联合用药在不同抑制率(fa)时的联合指数(CI)。根据:CI〉1表示两药拮抗作用,CI:1表示两药相加作用,CI〈1表示两药协同作用,判断联合用药对HL一60细胞增殖作用的影响。③将HL-60细胞分为对照组(未加药)、1.0μmol/LATO组、5.0μmol/LVK2组、联合用药组(1.0μmol/LATO+5.0μmol/LVK2),培养48h后,应用AnnexinV/PI法检测细胞凋亡水平。结果@ATO、VK:单独用药可抑制HL-60细胞的生长,并呈时间和剂量依赖性,24、48、72h的IC50分别为(22.86±2.44)、(6.66±0.34)、(4.14±0.41)和(18.40±1.12)、(13.48±0.73)、(8.95±0.40)μmol/L;②ATO、VK2联合用药时、CI〈1,二者呈协同抑制效应;③与对照组[(4.38±0.56)%]比较,1.0μmol/LATO组[(5.76±1.63)%]和5.0μmol/LVK2组[(6.38±1.42)%]HL一60细胞凋亡率未见明显改变(P均〉0.05),而联合用药组[(44.18±8.42)%]HL一60细胞的凋亡率明显增高(P〈0.01),且联合用药组明显高于两个单独用药组(P均〈0.01)。结论ATO、VK2联合应用可增加对HL-60细胞的增殖抑制作用,二者联用表现为协同效应,诱导凋亡可能参与了这种协同作用。
Objective To investigate the therapeutic effects of arsenic trioxide(ATO) plus vitamin K2(VK2) on proliferation of HL-60 Cells from acute promyelocytic leukemia cell line and explore the possible mechanism. Methods ①HL-60 cells were exposed to ATO(O.0, 0.5, 1.0, 2.0, 4.0 μmol/L), VK2(0.0, 2.5, 5.0, 10.0, 20.0 μmol/L), or both of different concentrations (0.5 μmol/L ATO ± 2.5 μmol/L VK2, 1.0 μmol/L ATO ± 5.0 Ixmol/L VK2, 2.0 μmol/L ATO ± 10.0 μmol/E VK2, 4.0 μmol/L ATO ± 20.0 μmol/L VK2) for 24, 48 or 72 h, respectively. The method of CCK-8 was used to assess the proliferation of HL-60 cells and the half inhibitory concentration(ICs0) of ATO or VK2 was calculated, respectively. ②Combination index (CI) was used to evaluate the combinative effect of the two treatments : CI 〈 1, = 1 or 〉 1 indicated synergistic, additive, or antagonistic effect, respectively. ③After HL-60 cells were treated with 1.0 μmol/L ATO or 5.0 μmol/L VK2 individually or simultaneously for 48 h, Annnexin V/PI staining was performed to identify the apoptosis rate of each group. Untreated cells were used as control group. Results ①ATO or VK2 alone inhibited the proliferation of HL-60 cells in a concentrationand time dependent manner. The IC5o of ATO or VK2 at time Of 24, 48, 72 h were (22.86 ± 2.44), (6.66 ± 0.34), (4.14 ± 0.41) and (18.40 ± 1.12), (13.48 ± 0.73), (8.95 ± 0.40) μmol/L, respectively;②The combination of ATO and VK2 illustrated a synergistic effect with CI 〈 1. ③No statistical difference was found among control group [ (4.38 ± 0.56)%], 1.0 μmolfL ATO group [(5.76 ± 1.63)%] and 5.0 IxmolfL VK2 group [(6.38 ± 1.42)%] in the apoptosis rate (all P 〉 0.05 ). However, the apoptosis rate of combined group did rise to (44.18 ± 8.42)%, with a significant improvement to that of VK2 or ATO group alone (all P 〈 0.01 ). Conclusions The combination of VK2 and ATO exhibits an enhanced synergistieal inhibitive effect on proliferation of HL-60 cells, and apoptosis may be involved in this synergy in part.
出处
《中华地方病学杂志》
CAS
CSCD
北大核心
2013年第3期258-262,共5页
Chinese Journal of Endemiology
基金
黑龙江省青年基金(QC2012C030)
黑龙江省卫生厅课题(2012-607)