雄黄纳米微粒对人白血病细胞株HL-60的诱导分化作用

目的：探讨雄黄（As4S4）纳米微粒对于人急性早幼粒白血病细胞HL-60的抑制增殖和诱导分化作用。 方法：采用MTT法观察低浓度雄黄对HL-60细胞增殖的影响,Wright-Giemsa 染色观察细胞形态,硝基四氮唑蓝（NBT）还原反应和流式细胞术抗原检测等鉴定细胞的分化。结果：细胞经雄黄处理后呈现明显的分化形态。经0.25～1.0 μmol·L^-1 雄黄作用24 h 后,NBT阳性率升高。用0.50 μmol·L^-1雄黄处理48 h,细胞表面分化抗原CD11b表达升高,细胞周期阻滞于G1期。 结论：低浓度雄黄对HL-60细胞具有诱导分化作用。

Differentiation of HL-60 cells induced by realgar nano-particles

OBJECTIVE: To investigate the proliferation inhibition and the differentiation effects of realgar (As4S4) nano-particles on human acute myeloid leukemia cell line HL-60. METHOD: Cell viability was determined by MTT and PI-stained cell cycle assays. The realgar induced morphological changes on cells were examined after Wright-Giemsa staining. The cell differentiation was evaluated with NBT and specific cell surface antigen (CD11b and CD14) expression assays. RESULT: HL-60 cells exhibited obvious morphological features of differentiation after the realgar treatment. A 24 h incubation of the cells with 0.25-1.0 micromol x L(-1) realgar caused a great increase in NBT reduction ability. The expressions of CD11b and CD14 were augmented in cells treated with 0.50 micromol x L(-1) realgar for 48 h, and cell cycles were arrested in G1 phase. CONCLUSION: Low dose realgar induces differentiation in human acute myeloid leukemia cell line HL-60.