地西他滨对多发性骨髓瘤U266细胞株生物学行为的影响

Effects of Decitabine on Biological Behavior of U266 Cells

本研究以多发性骨髓瘤U266细胞株为实验对象,探讨地西他滨对其生物学功能的影响,为MM的临床治疗提供新思路及实验依据,也为MM的发病机制提供进一步的佐证。应用MTT实验、平板克隆形成试验、FCM分析细胞周期、transw ell迁移及m atrigel侵袭试验分别检测地西他滨对U266细胞增殖、迁移及侵袭能力的影响。结果表明,地西他滨随着浓度增加对U266细胞增殖抑制作用增强,呈剂量和时间依赖性;FCM检测结果表明地西他滨处理后,G0-G1期U266细胞明显增加,S期和G2-M期细胞降低(p<0.05),表明地西他滨可抑制U266细胞DNA合成,将细胞周期阻滞在G0-G1期;低浓度(0.8mm o l/L)地西他滨处理后,U266细胞迁移能力及侵袭力明显降低(p<0.05)。结论:地西他滨对U266细胞的增殖、迁移、侵袭能力均有抑制作用,本研究为地西他滨应用于MM临床治疗提供了一定的实验依据。

This study was aimed to explore the effects of decitabine on the biological behaviour of U266 cells in vitro so as to provide a new thinking and experiment basis, as well as new evidences for the pathogenesis of multiple myeloma. MTT and colony formation assays were used to evaluate the impact of decitabine on the ability of proliferation of U266 cells; flow cytometry was used to analyze the cell distribution in cell cycle; transwell chamber and matrigel assays were used to observe the ability of migration and invasion. The results indicated that decitabine could significantly suppress the proliferation of U266 cells in time- and dose-dependent manners. The flow cytometric analysis demonstrated that the cells in G0- G1 phase significantly increased while the ceils in S and G2/M phase decreased. The migration and matrigel invasing tests showed that the number of cells moving into under chamber of transwell decreased after U266 cells treated with decitabine. It is concluded that decitabine may act as an effective drug for MM by inhibiting the oroliferation, migration and invasion ability, and the specific mechansim needs to be deeply explored.