雄黄对NB4及HL-60细胞的促凋亡作用

目的：研究复方青黛片的主要成分雄黄治疗急性早幼粒细胞白血病（ＡＰＬ）的机制。方法：应用细胞形态、ＤＮＡ电泳及流式细胞仪测定等多项方法，在体外研究雄黄诱导ＮＢ４细胞和ＨＬ６０细胞凋亡的作用。结果：雄黄具有诱导ＮＢ４细胞和ＨＬ６０细胞凋亡作用，雄黄浓度在２５．０～２００．０ｍｇ／Ｌ之间这种诱导作用无明显差异。浓度为１２．５ｍｇ／Ｌ，培养７２小时，ＮＢ４细胞表现典型的凋亡特征而ＨＬ６０细胞则无。二硫化二砷（Ａｓ２Ｓ２）与雄黄在相同条件下实验结果一致。结论：雄黄诱导ＮＢ４和ＨＬ６０细胞凋亡是其主要成分Ａｓ２Ｓ２的作用，而非其所含少量其它重金属元素的作用。在一定范围，其作用随时间和浓度增加而增强。雄黄是复方青黛片治疗ＡＰＬ取得高缓解率的中药成分。

Studies on red orpiment induction of NB 4 and HL-60 cell apoptosis

OBJECTIVE: To study the possible mechanism of red orpiment, which is main component of composite indigo naturalis tablets, in the treatment of acute promyelocytic leukemia(APL). METHODS: The effect of red orpiment on induction of APL cell line NB4 and HL-60 apoptosis were studied by cell morphology, DNA gel electrophoresis and flow cytometry assay. RESULTS: Red orpiment induced NB4 and HL-60 cell apoptosis. When treated with different concentration of red orpiment(25-200 micrograms/ml) for 16 hours, both NB4 and HL-60 cells showed typical apoptosis features. If decreased the concentration of red orpiment to 12.5 micrograms/ml, the NB4 cell still showed apoptosis features while the HL-60 cell did not when cultured for 72 hours. Arsenic disulfide(As2S2) had the same effect as red orpiment did under the same experiment condition. CONCLUSION: It is the main component, As2S2 of the red orpiment that can induces NB4 and HL-60 cell apoptosis. and the red orpiment is responsible for the high CR rate of APL induced by the composite indigo naturalis tablets.