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3O4纳米颗粒细胞毒性的研究'> Fe3O4纳米颗粒细胞毒性的研究

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3结论

集落实验和RTPCR实验结果显示:在实验所采用的颗粒浓度范围内,Fe3o4纳米颗粒对HeLa细胞基本没有细胞毒性.对于核苷酸修复通路有缺陷的XPF细胞,Fe3O4纳米颗粒可以抑制该细胞的生长和分裂,表现出一定的细胞毒性.Fe3O4纳米颗粒可以使XPF细胞内CHEK1,RPA1,RPA2,RPA3基因转录比较明显地增加.CHEK1基因转录的增加可以使XPF细胞的细胞周期停止,从而抑制其分裂和生长.而RPA1,RPA2,RPA3基因转录增加暗示了Fe3O4纳米颗粒对XPF细胞产生某种损害.但究竟是何种损害需要进一步研究.本文的研究结果表明:fe3o4纳米颗粒在肿瘤诊断、治疗上的应用必须谨慎,对有先天核苷酸剪切修复通路突变的肿瘤患者,就不能使用Fe3O4纳米颗粒,否则会对患者造成额外的损害.

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