原苏木素A对胃癌SGC-7901细胞系放疗增敏作用的研究

目的 本研究将原苏木素A、苏木醇提物、顺铂分别与放疗联合作用于胃癌细胞SGC-7901细胞系,研究原苏木素A是否增加胃癌SGC-7901细胞系放射敏感性,为临床用药开创更新的领域。方法 体外培养人胃癌细胞SGC-7901细胞系,以苏木醇提物、顺铂为对照,MTT法检测原苏木素A对细胞增殖作用的影响,以及其与作用浓度和作用时间的关系;采用克隆形成实验,拟合细胞存活曲线,以单纯放疗组为对比,计算放射增比(SER),分析原苏木素A的增敏效果。结果 原苏木素A对人胃癌细胞SGC-7901有生长抑制作用,但抑制作用相对较弱,其细胞毒性有明显的时间和浓度依赖性。不同作用时间及作用浓度下的细胞形态发生明显的改变。克隆形成实验显示原苏木素A显著增加了SGC-7901细胞的放射敏感性,与单纯放射组对比,差异有统计学意义。结论 原苏木素A对胃癌SGC-7901细胞的抑制有浓度和时间的依赖性,联合放射治疗能够提高放射增敏作用,两者可能具有协同抗肿瘤作用。

Protosappanin A increases the sensitivity of gastric cancer SGC-7901 cells to radiotherapy

Objective In this study,Protosappanin A,Caesalpinia Sappan L extract and Cisplatin were combined with radiotherapy in gastric cancer cell SGC-7901 to investigate whether the Protosappanin A could increase radiosensitivity(SER)in gastric cancer SGC-7901 cells.This will be medication to create new areas of innovation in the future.Methods The cell proliferation of SGC-7901 cells was detected by MTT assay.The relationship between the effect of the Protosappanin A on cell proliferation and the time of action was determined.Caesalpinia Sappan L extract and Cisplatin were as controls.The fitted cell survival curve and clonal formation assays were used to determine the SER to analyze the sensitizative effect of Protosappanin A.Results Protosappanin A could inhibit the growth of SGC-7901 cells,and its inhibitory effect is relatively weak.Its cytotoxicity has a time-and concentration-dependent manner.Cellular morphological changes were observed accompanying with increased concentrations and time treatments of Protosappanin A.Clonal formation experiment showed that the Protosappanin A significantly increased the radiosensitivity of SGC-7901 cells when compared to the radioactive group.They showed a statistically difference.Conclusion The inhibitory effect of the Protosappanin A on SGC-7901 cells in a concentration and time-dependent manner.Protosappanin A combined radiotherapy can improve the radiosensitization of cells,both of which may have synergistic anti-tumor effect.