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SILAC-based quantitative proteomics identifies size-dependent molecular mechanisms involved in silver nanoparticles-induced toxicity

机译:基于氧化硅酸的定量蛋白质组学识别涉及银纳米粒子诱导的毒性的尺寸依赖性分子机制

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摘要

Silver nanoparticles are currently one of the most widely used metallic nanoparticles. Due to their antibacterial properties, they are applied in textiles, house-holds items, and medical devices, among many other products. Understanding the potential toxicity associated with silver nanoparticles and the differential effect that nanoparticles of different size might induce is crucial, due to the increasing human and environmental exposure to this type of nanoparticles. In this work, we explored the different biomolecular mechanisms underlying the toxicity of silver nanoparticles in a size-dependent manner. Quantitative proteomic analysis of hepatic cells exposed to 10 and 60nm silver nanoparticles demonstrated the alteration of a different set of proteins depending on the particle size. We demonstrated that while 10nm silver nanoparticles induce nucleolar stress and ribosome biogenesis halt, both types of nanoparticles induce DNA damage and oxidative stress but through different pathways. In addition, both types of nanoparticles also affected cell proliferation, disrupted the cell cycle and ultimately, induced apoptosis. The alteration of different cellular mechanisms in a size-dependent manner, have relevant implications not only from a toxicity point of view, but also for the potential applications of silver nanoparticles.
机译:银纳米粒子目前是最广泛使用的金属纳米颗粒之一。由于它们的抗菌性能,它们以纺织品,房屋固定物品和医疗器械应用于许多其他产品。了解与银纳米颗粒相关的潜在毒性和差异效果,即不同尺寸的纳米颗粒可能诱导的差异效果是至关重要的,这是由于这种类型的纳米颗粒的较高和环境暴露。在这项工作中,我们探讨了诸如尺寸依赖性方式的银纳米粒子毒性的不同生物分子机制。暴露于10和60nm银纳米粒子暴露于10和60nm银纳米粒子的定量蛋白质组学分析证明了根据粒度改变不同的蛋白质。我们证明,虽然10NM银纳米颗粒诱导核仁应力和核糖体生物发生停止,但两种类型的纳米颗粒诱导DNA损伤和氧化应激,而是通过不同的途径。此外,两种类型的纳米颗粒也会影响细胞增殖,破坏细胞周期,最终诱导细胞凋亡。以尺寸依赖性方式改变不同细胞机制,不仅具有相关的影响,不仅具有来自毒性的观点,而且具有相关的影响,而且还具有用于银纳米颗粒的潜在应用。

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