辛伐他汀选择性抑制慢性髓性白血病细胞增殖并诱导凋亡

目的:探讨胆固醇合成限速酶3-羟3-甲基戊二酰辅酶A (3-hydroxy-3-methylglutaryl coenzyme A , HMG-CoA)还原酶抑制剂辛伐他汀对慢性髓性白血病（chronic myelogenous leukemia , CML）细胞增殖和凋亡的影响。方法:正常骨髓和CML骨髓单个核细胞用10 mg*L－1辛伐他汀处理24 h后，接种于甲基纤维素培养体系中，分析粒单细胞集落刺激因子(colong forming unit-granulocyte macrophage, CFU-GM)集落形成能力。同时，用流式细胞仪测定辛伐他汀处理72 h后正常骨髓和CML骨髓单个核细胞中亚二倍体细胞以及DNA末端标记阳性细胞作为细胞凋亡的指标。结果:辛伐他汀可选择性抑制CML细胞增殖并诱导CML细胞凋亡，而对正常骨髓细胞无明显作用。结论:CML骨髓细胞较正常骨髓细胞对辛伐他汀敏感，表明该制剂作为CML化疗或体外净化进行自体骨髓移植具有潜在的应用价值。

Simvastatin selectively inhibits proliferation and induces apoptosis of chronic myelogenous leukemia cells

Objective: To explore the effect of simvastatin, an inhibitor of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase (the rate-limiting enzyme of cholesterol synthesis) on the proliferation and apoptosis of chronic myelogenous leukemia (CML) cells. Methods: Both normal and CML bone marrow progenitor cells were assayed in semisolid methylcellulose culture after incubation for 24 hours in suspension culture with 10 mg*L－1 simvastatin. Also, sub-G1 cells and DNA end-labeling positive cells as apoptotic cells were identified by flow cytometry after being exposed to simvastatin for 72 hours. Results: Simvastatin selectively inhibited proliferation and induced apoptosis of CML cells, but had no much influence on normal bone marrow cells. Conclusion: CML cells are more sensitive to a short-term exposure to simvastatin than normal bone marrow cells. It will be a promisingly effective chemotherapeutic agent or in vitro purging agent in autologous stem cell transplantation for the treatment of CML.