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Identifying a size-specific hazard of silica nanoparticles after intravenous administration and its relationship to the other hazards that have negative correlations with the particle size in mice

机译:在静脉内给药后鉴定硅纳米粒子的尺寸特异性危害及其与与小鼠粒度具有负相关性的其他危害的关系

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摘要

Many of the beneficial and toxic biological effects of nanoparticles have been shown to have a negative correlation with particle size. However, few studies have demonstrated biological effects that only occur at specific nanoparticle sizes. Further elucidation of the size-specific biological effects of nanoparticles may reveal not only unknown toxicities, but also novel benefits of nanoparticles. We used surface-unmodified silica particles with a wide range of diameters and narrow size intervals between the diameters (10. 30. 50. 70. 100. 300. and 1000 nm) to investigate the relationship between particle size and acute toxicity after intravenous administration in mice. Negative correlations between particle size and thrombocytopenia, liver damage, and lethal toxicity were observed. However, a specific size-effect was observed for the severity of hypothermia, where silica nanoparticles with a diameter of 50 nm induced the most severe hypothermia. Further investigation revealed that this hypothermia was mediated not by histamine, but by platelet-activating factor, and it was independent of the thrombocytopenia and the liver damage. In addition, macrophages/ Kupffer cells and platelets, but not neutrophils, play a critical role in the hypothermia. The present results reveal that silica nanoparticles have particle size-specific toxicity in mice, suggesting that other types of nanoparticles may also have biological effects that only manifest at specific particle sizes. Further study of the size-specific effects of nanoparticles is essential for safer and more effective nanomedicines.
机译:已显示纳米颗粒的许多有益和有毒的生物学效果与颗粒尺寸具有负相关性。然而,很少有研究表明只有在特定的纳米粒子尺寸下发生的生物学效应。进一步阐明纳米颗粒的尺寸特异性生物学效果可以揭示不仅是未知的毒性,而且纳米颗粒的新益处。我们使用具有宽范围直径的表面未经改性的二氧化硅颗粒,直径(10.30.70.100.300.和1000nm)之间的窄尺寸间隔,以研究静脉内施用后粒度和急性毒性之间的关系在老鼠中。观察粒度和血小板减少症之间的负相关性,肝损伤和致命毒性。然而,观察到特异性尺寸效应对于体温过低的严重程度,其中直径为50nm的二氧化硅纳米粒子诱导最严重的体温过低。进一步调查显示,这种体温过低不是由组胺介导的,而是通过血小板活化因子,并且它与血小板减少症和肝脏损伤无关。此外,巨噬细胞/ kupffer细胞和血小板,但不是中性粒细胞,在体温过低中发挥着关键作用。本结果表明,二氧化硅纳米粒子在小鼠中具有粒度尺寸特异性毒性,表明其他类型的纳米颗粒也可以具有仅在特定粒度尺寸下显现的生物效应。进一步研究纳米颗粒的尺寸特异性效果对于更安全和更有效的纳米胺至关重要。

著录项

  • 来源
    《Nanotechnology》 |2017年第13期|共11页
  • 作者单位

    Osaka Univ Grad Sch Pharmaceut Sci Lab Toxicol &

    Safety Sci 1-6 Yamadaoka Suita Osaka 5650871 Japan;

    Osaka Univ Grad Sch Pharmaceut Sci Lab Toxicol &

    Safety Sci 1-6 Yamadaoka Suita Osaka 5650871 Japan;

    Osaka Univ Grad Sch Pharmaceut Sci Lab Toxicol &

    Safety Sci 1-6 Yamadaoka Suita Osaka 5650871 Japan;

    Osaka Univ Grad Sch Pharmaceut Sci Lab Toxicol &

    Safety Sci 1-6 Yamadaoka Suita Osaka 5650871 Japan;

    Natl Inst Biomed Innovat Hlth &

    Nutr Lab Biopharmaceut Res 7-6-8 Saitoasagi Osaka 5670085 Japan;

    Osaka Univ Grad Sch Pharmaceut Sci Lab Toxicol &

    Safety Sci 1-6 Yamadaoka Suita Osaka 5650871 Japan;

    Osaka Univ Grad Sch Pharmaceut Sci Lab Toxicol &

    Safety Sci 1-6 Yamadaoka Suita Osaka 5650871 Japan;

    Osaka Univ Grad Sch Pharmaceut Sci Lab Toxicol &

    Safety Sci 1-6 Yamadaoka Suita Osaka 5650871 Japan;

    Osaka Univ Grad Sch Pharmaceut Sci Lab Toxicol &

    Safety Sci 1-6 Yamadaoka Suita Osaka 5650871 Japan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 特种结构材料;
  • 关键词

    silica nanoparticles; size; platelet-activating factor; coagulopathy;

    机译:二氧化硅纳米粒子;尺寸;血小板激活因子;凝结病;

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