原苏木素A对胃癌SGC-7901细胞系放疗增敏作用的研究

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

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。

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.