磷酸氯喹诱导U937细胞凋亡机制的研究

目的 将磷酸氯喹作用于白血病细胞株U937，观察其对白血病细胞凋亡的影响；并研究磷酸氯喹是否通过逆转凋亡相关基因PNAS-2蛋白在白血病细胞中异常的亚细胞定位，从而促进细胞凋亡的机制。方法 将不同剂量的磷酸氯喹加入体外培养至对数生长期的白血病细胞株U937培养液中。MTT法检测细胞增殖；流式细胞仪和激光共聚焦显微镜检测细胞凋亡，同时观察磷酸氯喹对U937细胞中PNAS-2蛋白亚细胞定位的影响。结果 50 μg /mL磷酸氯喹可显著促进U937细胞发生凋亡，并使白血病细胞中PNAS-2蛋白的异常亚细胞定位发生改变。结论 磷酸氯喹对白血病细胞株U937有促进凋亡的作用，其凋亡机制可能是使PNAS-2蛋白在白血病细胞中异常的亚细胞定位恢复正常，对于临床治疗白血病的具有潜在的应用价值。

Research on mechanism of chloroquine phosphate-induced U937 cell apoptosis

Objective To observe the effects of chloroquine phosphate on apoptosis of leukemic cell line U937, and investigate whether chloroquine phosphate induces leukemic cell apoptosis by normalizing protein PNAS-2's abnormal subcellular location. Methods Chloroquine phosphate of different concentrations were added into culture fluid of leukemic cell line U937 at logarithmic phase. MTr was used to measure cell proliferation, flow cytometry and laser confocal microscopy were applied to detect cell apoptosis, and immunofluorescence technology was employed to observe the effects of chloroquine phosphate on the changes of subcellular location of protein PNAS-2. Results Apoptosis of leukemic cell line U937 was significantly induced by 50 μg/mL chloroquine phosphate, and subcellular location of protein PNAS-2 was changed. Conclusion Chlorequine phosphate can induce apoptosis of leukemic cell line U937, and the mechanism may be related to the normalization of PNAS-2's abnormal subcellular location in U937 cell line. Chloroquine phosphate has the potential to be used in leukemic therapy.