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首页> 外文期刊>Journal of applied toxicology >Comparative study of cytotoxicity, oxidative stress and genotoxicity induced by four typical nanomaterials: the role of particle size, shape and composition.
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Comparative study of cytotoxicity, oxidative stress and genotoxicity induced by four typical nanomaterials: the role of particle size, shape and composition.

机译:四种典型纳米材料诱导的细胞毒性,氧化应激和遗传毒性的比较研究:粒径,形状和组成的作用。

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Although the biological effects of some nanomaterials have already been assessed, information on toxicity and possible mechanisms of various particle types are insufficient. Moreover, the role of particle properties in the toxic reaction remains to be fully understood. In this paper, we aimed to explore the interrelationship between particle size, shape, chemical composition and toxicological effects of four typical nanomaterials with comparable properties: carbon black (CB), single wall carbon nanotube, silicon dioxide (SiO(2)) and zinc dioxide (ZnO) nanoparticles. We investigated the cytotoxicity, genotoxicity and oxidative effects of particles on primary mouse embryo fibroblast cells. As observed in the methyl thiazolyl tetrazolium (MTT) and water-soluble tetrazolium (WST) assays, ZnO induced much greater cytotoxicity than non-metal nanoparticles. This was significantly in accordance with intracellular oxidative stress levels measured by glutathione depletion, malondialdehyde production, superoxide dismutase inhibition as well as reactive oxygen species generation. The results indicated that oxidative stress may be a key route in inducing the cytotoxicity of nanoparticles. Compared with ZnO nanoparticles, carbon nanotubes were moderately cytotoxic but induced more DNA damage determined by the comet assay. CB and SiO(2) seemed to be less effective. The comparative analysis demonstrated that particle composition probably played a primary role in the cytotoxic effects of different nanoparticles. However, the potential genotoxicity might be mostly attributed to particle shape. Copyright (c) 2008 John Wiley & Sons, Ltd.
机译:尽管已经评估了某些纳米材料的生物效应,但有关毒性和各种颗粒类型可能机理的信息尚不足。而且,颗粒性质在毒性反应中的作用还有待充分理解。在本文中,我们旨在探讨四种具有可比性能的典型纳米材料的粒径,形状,化学组成和毒理学效应之间的相互关系:炭黑(CB),单壁碳纳米管,二氧化硅(SiO(2))和锌二氧化碳(ZnO)纳米颗粒。我们调查了颗粒对原代小鼠胚胎成纤维细胞的细胞毒性,遗传毒性和氧化作用。正如在甲基噻唑基四唑鎓(MTT)和水溶性四唑鎓(WST)分析中所观察到的,与非金属纳米颗粒相比,ZnO诱导的细胞毒性要大得多。这与谷胱甘肽耗竭,丙二醛产生,超氧化物歧化酶抑制以及活性氧的产生所测量的细胞内氧化应激水平显着一致。结果表明,氧化应激可能是诱导纳米颗粒细胞毒性的关键途径。与ZnO纳米颗粒相比,碳纳米管具有中等的细胞毒性,但通过彗星试验确定了更多的DNA损伤。 CB和SiO(2)似乎不太有效。对比分析表明,颗粒组成可能在不同纳米颗粒的细胞毒性作用中起主要作用。但是,潜在的遗传毒性可能主要归因于颗粒形状。版权所有(c)2008 John Wiley&Sons,Ltd.

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