雄黄纳米微粒对于白血病细胞的诱导凋亡及坏死作用

目的 :考察雄黄纳米微粒对于HL 6 0和K5 6 2细胞的增殖抑制作用与诱导凋亡及坏死作用 ,并初步探寻表现药理活性的化学物种。方法 :采用“溶剂接力”法制备雄黄纳米微粒悬浮液 ,应用MTT法检测雄黄纳米微粒对HL-6 0和K5 6 2细胞的增殖抑制作用 ,通过AnnexinV-PI双染流式细胞术和细胞形态学观察检测细胞凋亡和坏死 ,并以H₃AsO₃(As₂O₃在该溶液中的主要存在形式 )作为阳性对照。结果 :雄黄纳米微粒的平均粒径为 15 9.0nm。MTT实验结果显示 ,该制剂对于这 2种细胞系均有明显的增殖抑制作用。双染实验表明 ,雄黄纳米微粒可诱导这 2种细胞凋亡和坏死 ,此结果得到形态学观察的进一步证实。结论 :雄黄纳米微粒对于HL-6 0和K5 6 2这 2种细胞系均具有诱导凋亡和坏死的双重作用 ,既含有As-O又含有As-S键的硫代亚砷酸盐可能是表现药理活性的主要化学物种之一。

Realgar nano-particles induce apoptosis and necrosis in leukemia cell lines K562 and HL-60

Objective: To examine the growth-inhibitory, apoptosis- and necrosis-inducing effects of realgar nano-particles (RNP) in human chronic myelogenous leukemia cell line K562 and acute myeloid leukemia cell line HL-60, and to find out the chemical species with efficacy. Method: A "solvent-relay" strategy was used for the preparation of RNP suspension. Cell viability was determined by MTT assay. Cell apoptosis and necrosis were characterized with Annexin V-PI double staining in association with flow cytometry and with morphological examination with Hoechst 33258 staining. Parallel experiments with arsenous acid (H₃AsO₃), the dominant form of arsenic trioxide in the solution, were conducted for comparison. Result: The mean diameter of RNP was 159.0 nm. RNP showed growth-inhibitory effect on both cell lines. The double staining test indicated that RNP induced both apoptosis and necrosis, and this was further confirmed by morphological examination. Conclusion: RNP induced both apoptosis and necrosis in leukemia cell lines K562 and HL-60. Thioarsenite species with both As-O and As-S bonds may be the active intermediates in the RNP.