丹皮酚诱导K_(562)细胞凋亡的研究

目的　探讨丹皮酚 (Paeonol,Pae)对K562 细胞增殖和凋亡的影响。方法　采用MTT法检测丹皮酚对体外培养的K562 细胞的增殖抑制作用 ,通过HE染色和流式细胞仪定性和定量分析Pae的诱导凋亡作用。结果　Pae在 7 81～2 5 0mg·L-1浓度范围内对K562 细胞的增殖均有抑制作用 ,呈现明显的剂量依赖效应关系。HE染色光镜下可见典型的肿瘤细胞凋亡改变。Pae在 7 81、15 6 3、31 2 5、6 2 5及12 5mg·L-1浓度下作用 2 4h均可诱导K562 细胞凋亡 ,其凋亡率分别为 10 0 1%、 12 4 6 %、 17 10 %、 2 9 18%和34 16 % ,有明显的剂量效应关系 ,Pae 6 2 5、2 5、10 0mg·L-13种浓度分别作用于K562 细胞 6、12及 2 4h。发现以上各种浓度在 6h即可诱导细胞凋亡 ,作用时间越长 ,凋亡率越高 ,有明显的时间效应关系。结论　Pae能抑制K562 细胞增殖和诱导凋亡

Study on effects of paeonol in inhibiting growth of K562 and inducing its apoptosis

AIM To investigate the effect of paeonol on proliferation and apoptosis of K 562. METHODS The inhibitory effect of paeonol on K 562 cells proliferation was assayed by MTT dye reduction. HE staining were used to observe the morphology of apoptotic cells, and Flow cytometric analysis were also used to analyze the K 562 apoptosis. RESULTS Pae at the concentration of 7.81～250 mg·L -1 significantly inhibited proliferation of K 562 cells in dose-dependent manner. Typical apoptotic changes were observed in K 562 cells under the light microscope. By FCM methods, the apoptotic rates of K 562 cells were increased from 10.01% to 34.16% after treatment of Pae at concentrations from 7.81 to 125 mg·L -1 for 24 h, which showed obvious concentration-effect relationship. The apoptotic rates of K 562 cells were also increased when Pae (6.25, 25 and 100 mg·L -1) was treated for 6, 12 and 24 h, which showed obvious time-effect relationship. CONCLUSION Paeonol may inhibit K 562 cell proliferation and induce its apoptosis.