Embelin对HL-60细胞增殖、分化和凋亡的影响

目的 研究Embelin对HL-60细胞增殖、分化和凋亡的影响,并对其作用机制进行初步探讨.方法 用不同浓度的Embelin处理HL-60细胞,采用MTT法绘制生长曲线,通过Annexin V/PI 复染及JC-1染色,观察Embelin对HL-60细胞凋亡的影响;通过流式细胞术检测细胞表面分化抗原CD33、CD34、CD11b和CD14表达的变化.在对HL-60细胞研究的基础上,选择9例急性非淋巴细胞白血病(ANLL)患者的骨髓进行相应的研究.结果 Embelin对HL-60细胞具有增殖抑制作用,且作用呈时间和剂量依赖性.24 h的,IC50值为429.98 μmoL/L.33.97 μmol/L的Embelin作用HL-60细胞3 d,流式细胞术检测结果 显示CD11b、CD14阳性细胞率均升高(P值均<0.01);339.67 μmol/L Embelin作用于HL-60细胞后12、24及48 h的特异性凋亡率分别为(9.23 ±0.05)%、(25.86 ±0.30)%和(39.03±0.07)%,10.19、33.97、101.90、339.67及1019.02 μmol/L Embelin作用于HL-60细胞24 h后特异性凋亡率分别为(0.07±0.03)%、(7.43±0.30)%、(14.01±0.01)%、(25.52±0.03)%和(39.15±0.01)%,其诱导凋亡的作用呈时间及剂量依赖性.33.97 μmol/L的Embelin作用于ANLL 患者骨髓细胞3 d,3例M3患者骨髓细胞表面分化抗原出现显著性改变;339.67 μmol/L的Embelin作用患者骨髓细胞24 h,9例均发生凋亡.结论 亚细胞毒浓度的Embelin可诱导HL-60细胞向单核细胞分化;高浓度的Embelin对HL-60细胞具有增殖抑制及促进凋亡的作用.其促进凋亡的机制与线粒体凋亡途径有关.亚细胞毒浓度的Embelin对体外培养的M3患者骨髓细胞具有促进分化的作用;339.67 μmol/L的Embelin对ANLL骨髓细胞具有促进凋亡的作用.

Effect of embelin on proliferation, differentiation and apoptosis of HL-60 cells

Objective To study the effect of embelin on proliferation, differentiation and apoptosis of HL-60 cells and explore its possible mechanism. Methods Different concentration of embelin were used to treat HL-60 cells. Cell growth curve was analysed by MTT assay, cell apoptosis by Annexin V/PI double staining and JC-1 dye. The differentiation of HL-60 cells was evaluated by expression of CD33 , CD34, CD11 b and CD14. Bone marrow cells (BMC) from nine patients with acute nonlymphocytic leukemia( ANML) were also studied. Results Embelin induced differentiation of HL-60 cells with significant increase of CD14 and CD1lb expression at 33. 97μ,mol/L for 3 days( P < 0. 01 ). Embelin induced apoptosis of HL-60 cells in a time- and dose-dependent manner, the apoptosis rates were (9. 23 0. 05 ) % , ( 25. 86 0. 30) % and (39.03 0. 07)% respectively at 339. 67 μmol/L of embelin for 12-, 24- and 48-hours treatment (P < 0.05); the apoptosis rates were (0. 07 0. 03)% , (7. 43 0. 30)% , ( 14. 01 0. 01 )% , (25. 52 0.03)% and (39. 15 0.01)% respectively at 10. 19, 33.97, 101.90, 339.67 and 1019.02 μmol/L of embelin for 24-hours culture(P<0.05). Clusters of differentiation antigen on BMC from three acute promye-locytic leukemia patients showed significant changes at 33.97 μmol/L of embelin treatment for 3 days. Embelin induced apoptosis of BMCs from all the nine ANML patients at 33.97 μmol/L for 24 hour. Conclusion Embelin can inhibit proliferation and induce differentiation and apoptosis of HL-60 cells. The mechanism may be related to mitochondrial apoptosis pathway. Embelin at subtoxic concentration doesn't promote leukemia BMC differentiation, but at 339.67 μmol/L induces apoptosis of these cells.