文獻名:Lung exposure to nanoparticles modulates an asthmatic response in a mouse model
作者:S. Hussain*,#,e, J.A.J. Vanoirbeek#,e, K. Luyts#, V. De Vooght#, E. Verbeken", L.C.J. Thomassen+, J.A. Martens+, D. Dinsdale1, S. Boland*, F. Marano*, B. Nemery# and P.H.M. Hoet#
*Laboratory of Molecular and Cellular Responses to Xenobiotics, Unit of Functional and Adaptive Biology, University of Paris Diderot, Paris, France.
#Research Unit for Lung Toxicology.
"Morphology and Molecular Pathology Section, and
+Center for Surface Chemistry & Catalysis, KU Leuven, Leuven, Belgium.
1MRC Toxicology Unit, University of Leicester, Leicester, UK.
eThese authors contributed equally to the study.
摘要:The aim of this study was to investigate the modulation of an asthmatic response by titanium dioxide (TiO2) or gold (Au) nanoparticles (NPs) in a murine model of diisocyanateinduced asthma.
On days 1 and 8, BALB/c mice received 0.3% toluene diisocyanate (TDI) or the vehicle acetone–olive oil (AOO) on the dorsum of both ears (20 mL). On day 14, the mice were oropharyngeally dosed with 40 mL of a NP suspension (0.4 mg?mL-1 (,0.8 mg?kg-1) TiO2 or Au). 1 day later (day 15), the mice received an oropharyngeal challenge with 0.01% TDI (20 mL). On day 16, airway hyperreactivity (AHR), bronchoalveolar lavage (BAL) cell and cytokine analysis, lung histology, and total serum immunoglobulin E were assessed.
NP exposure in sensitised mice led to a two- (TiO2) or three-fold (Au) increase in AHR, and a three- (TiO2) or five-fold (Au) increase in BAL total cell counts, mainly comprising neutrophils and macrophages. The NPs taken up by BAL macrophages were identified by energy dispersive X-ray spectroscopy. Histological analysis revealed increased oedema, epithelial damage and inflammation.
In conclusion, these results show that a low, intrapulmonary doses of TiO2 or Au NPs can aggravate pulmonary inflammation and AHR in a mouse model of diisocyanate-induced asthma.
關(guān)鍵詞:Diisocyanate-induced asthma, gold, nanoparticle, titanium dioxide, toluene diisocyanate
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