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Effect of genistein-magnetic-nanoparticles on the growth and apoptosis of gastric cancer cell line SGC-7901
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- Author:
- No author available
- Journal Title:
- WORLD CHINESE JOURNAL OF DIGESTOLOGY
- Issue:
- 9
- DOI:
- 10.3969/j.issn.1009-3079.2008.09.017
- Key Word:
- 染料木黄酮;胃癌细胞;凋亡;纳米微粒;四甲基偶氮唑蓝
Abstract： 目的:探讨Genistein-磁性纳米微粒(Genistein-magnetic-nanoparticles.GEN-M-NPs)对胃癌细胞株SGC-7901生长及凋亡的影响.方法:利用化学共沉淀法制备GEN-M-NPs,透射电镜观察纳米微粒的形态,高效液相法测定包封率.以胃癌细胞株SGC-7901为实验对象,用四甲基偶氮唑蓝(MTT)比色法观察GEN-M-NPs和Genistein对其增殖活性的影响,采用流式细胞术检测细胞凋亡率,琼脂糖凝胶电泳观察DNA片段化改变情况.结果:GEN-M-NPs呈球形,粒径约105 nm,分布均匀.包封率约为10.3%.GEN-M-NPs对SGC-7901细胞生长有明显抑制作用,且呈剂量和时间依赖性(P＜0.05).与单药Genistein作用组相比,GEN-M-NPs具有缓释性(86.04%vs 67.11%.P＜0.05).流式细胞仪检测不同浓度GEN-M-NPs作用72 h后的细胞凋亡率分别是5.62%±2.04%(10 μmol/L)、13.46%±2.02%(20 μmol/L)、26.40%±3.84%(40μmol/L)、37.34%±4.68%(80 μmol/L)、49.43%±8.29%(100 μmol/L).阴性对照组的凋亡率为2.60%±1.34%.DNA凝胶电泳结果显示40 μmol/L组作用24 h可见明显的凋亡细胞形成的梯状条带.结论:GEN-M-NPs在体外能有效地抑制胃癌细胞增殖并诱导细胞凋亡,与Genistein相比,有缓释性.
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