三氧化二砷/锰锌铁氧体复合纳米粒体外治疗食管癌
Chinese Journal of Tissue Engineering Research(2013)
Abstract
背景:与传统的热疗方法相比,As2O3/Mn0.5Zn0.5Fe2O4复合纳米粒可以同时发挥As2O3的细胞毒性作用和磁感应加热的联合定向治疗作用,效果优于单一治疗。目的:制备As2O3/Mn0.5Zn0.5Fe2O4复合纳米粒,观察其对食管癌Eca109细胞增殖的抑制作用。方法:采用浸渍法制备As2O3/Mn0.5Zn0.5Fe2O4复合纳米粒,含砷量0.012%,以透射电镜、能谱仪、原子分光光度仪对其进行表征。向两块培养板的食管癌Eca109细胞中分别加入DMEM培养液(阴性对照)、Mn0.5Zn0.5Fe2O4纳米材料、含As2O3终浓度5μmol/L的As2O3/Mn0.5Zn0.5Fe2O4复合纳米粒、游离As2O3(终浓度5μmol/L),其中一块培养板进行磁流体热疗,另一块培养板正常培养。结果与结论:As2O3/Mn0.5Zn0.5Fe2O4复合纳米粒近似球形,As2O3成功浸渍在Mn0.5Zn0.5Fe2O4纳米材料表面,砷含量在0.012%-0.066%之间。当As2O3浓度为5μmol/L时,As2O3/Mn0.5Zn0.5Fe2O4复合纳米粒组细胞增殖率明显低于阴性对照组和Mn0.5Zn0.5Fe2O4纳米材料组(P<0.05);而在磁流体热疗中,As2O3/Mn0.5Zn0.5Fe2O4复合纳米粒组细胞增殖率明显低于游离As2O3组或Mn0.5Zn0.5Fe2O4组(P<0.05);在凋亡率检测中,As2O3/Mn0.5Zn0.5Fe2O4复合纳米粒联合磁流体热疗组细胞凋亡率明显高于Mn0.5Zn0.5Fe2O4纳米材料联合磁流体热疗组或游离As2O3组(P<0.05)。表明As2O3/Mn0.5Zn0.5Fe2O4复合纳米粒联合磁流体热疗可显著抑制食管癌细胞增殖。
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Key words
the National Natural Science Foundation of China,biomaterials,proliferation,As2O3/Mn0.5Zn0.5Fe2O4 complex,apoptosis,combined therapy,biomaterial photographs-containing paper,nanobiomaterials,esophageal cancer,Mn0.5Zn0.5Fe2O4,magnetic fluid hyperthermia
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