文獻名:Metal Oxide Nanoparticles Induce Unique Inflammatory Footprints in the Lung: Important Implications for Nanoparticle Testing
作者:Wan-Seob Cho1, Rodger Duffin1, Craig A. Poland1, Sarah E.M. Howie2, William MacNee1, Mark Bradley3, Ian L. Megson4, and Ken Donaldson1
1 ELEGI (The Edinburgh Lung and the Environment Group Initiative), Centre for Inflammation Research, University of Edinburgh, Edinburgh, United Kingdom;
2 Immunology Group, Centre for Inflammation Research and
3 School of Chemistry, University of Edinburgh, Edinburgh, United Kingdom;
4 Free Radical Research Facility, Department of Diabetes and Cardiovascular Science, Centre for Health Science, University of the Highlands and Islands, Inverness, United Kingdom
摘要:
背景:Metal oxide nanoparticles (NPs) have been widely used in industry, cosmetics, and biomedicine.
目的:We examined hazards of several well-characterized high production volume NPs because of increasing concern about occupational exposure via inhalation.
方法:A panel of well-characterized NPs [cerium oxide (CeO2NP), titanium dioxide (TiO2NP), carbon black (CBNP), silicon dioxide (SiO2NP), nickel oxide (NiONP), zinc oxide (ZnONP), copper oxide (CuONP), and amine-modified polystyrene beads] was instilled into lungs of rats. We evaluated the inflammation potencies of these NPs 24 hr and 4 weeks postinstillation. For NPs that caused significant inflammation at 24 hr, we then investigated the characteristics of the inflammation. All exposures were carried out at equal-surface-area doses.
結果:Only CeO2NP, NiONP, ZnONP, and CuONP were inflammogenic to the lungs of rats at the high doses used. Strikingly, each of these induced a unique inflammatory footprint both acuy (24 hr) and chronically (4 weeks). Acuy, patterns of neutrophil and eosinophil infiltrates differed after CeO2NP, NiONP, ZnONP, and CuONP treatment. Chronic inflammatory responses also differed after 4 weeks, with neutrophilic, neutrophilic/lymphocytic, eosinophilic/fibrotic/granulomatous, and fibrotic/granulomatous inflammation being caused respectively by CeO2NP, NiONP, ZnONP, and CuONP.
結論:Different types of inflammation imply different hazards in terms of pathology, risks, and risk severity. In vitro testing could not have differentiated these complex hazard outcomes, and this has important implications for the global strategy for NP hazard assessment. Our results demonstrate that NPs cannot be viewed as a single hazard entity and that risk assessment should be performed separay and with caution for different NPs.
關鍵詞:eosinophilic inflammation, intratracheal instillation, in vitro assay, in vivo assay, lymphocytic inflammation, metal oxide nanoparticles, neutrophilic inflammation, risk assessment, surface area dose, Wistar rat
免責聲明
- 凡本網注明“來源:化工儀器網”的所有作品,均為浙江興旺寶明通網絡有限公司-化工儀器網合法擁有版權或有權使用的作品,未經本網授權不得轉載、摘編或利用其它方式使用上述作品。已經本網授權使用作品的,應在授權范圍內使用,并注明“來源:化工儀器網”。違反上述聲明者,本網將追究其相關法律責任。
- 本網轉載并注明自其他來源(非化工儀器網)的作品,目的在于傳遞更多信息,并不代表本網贊同其觀點和對其真實性負責,不承擔此類作品侵權行為的直接責任及連帶責任。其他媒體、網站或個人從本網轉載時,必須保留本網注明的作品第一來源,并自負版權等法律責任。
- 如涉及作品內容、版權等問題,請在作品發(fā)表之日起一周內與本網聯(lián)系,否則視為放棄相關權利。