Role of chemical composition and redox modification of poorly soluble nanomaterials on their ability to enhance allergic airway sensitisation in mice.

Autor: Dekkers S; National Institute for Public Health and the Environment (RIVM), P.O.Box 1, 3720 BA, Bilthoven, The Netherlands. susan.dekkers@rivm.nl., Wagner JG; Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI, USA., Vandebriel RJ; National Institute for Public Health and the Environment (RIVM), P.O.Box 1, 3720 BA, Bilthoven, The Netherlands., Eldridge EA; Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI, USA., Tang SVY; Promethean Particles Ltd, Nottingham, UK., Miller MR; Centre for Cardiovascular Science, University of Edinburgh, Edinburgh, UK., Römer I; School of Geography, Earth and Environmental Sciences, University of Birmingham, Birmingham, UK., de Jong WH; National Institute for Public Health and the Environment (RIVM), P.O.Box 1, 3720 BA, Bilthoven, The Netherlands., Harkema JR; Department of Pathobiology and Diagnostic Investigation, Michigan State University, East Lansing, MI, USA., Cassee FR; National Institute for Public Health and the Environment (RIVM), P.O.Box 1, 3720 BA, Bilthoven, The Netherlands.; Institute for Risk Assessment Sciences, Utrecht University, Utrecht, the Netherlands.
Jazyk: angličtina
Zdroj: Particle and fibre toxicology [Part Fibre Toxicol] 2019 Oct 28; Vol. 16 (1), pp. 39. Date of Electronic Publication: 2019 Oct 28.
DOI: 10.1186/s12989-019-0320-6
Abstrakt: Background: Engineered nanoparticles (NPs) have been shown to enhance allergic airways disease in mice. However, the influence of the different physicochemical properties of these particles on their adjuvant properties is largely unknown. Here we investigate the effects of chemical composition and redox activity of poorly soluble NPs on their adjuvant potency in a mouse model of airway hypersensitivity.
Results: NPs of roughly similar sizes with different chemical composition and redox activity, including CeO 2 , Zr-doped CeO 2 , Co 3 O 4 , Fe-doped Co 3 O 4 (using Fe 2 O 3 or Fe 3 O 4 ) and TiO 2 NPs, all showed adjuvant activity. OVA induced immune responses following intranasal exposure of BALB/c mice to 0.02% OVA in combination with 200 μg NPs during sensitization (on day 1, 3, 6 and 8) and 0.5% OVA only during challenge (day 22, 23 and 24) were more pronounced compared to the same OVA treatment regime without NPs. Changes in OVA-specific IgE and IgG1 plasma levels, differential cell count and cytokines in bronchoalveolar lavage fluid (BALF), and histopathological detection of mucosa cell metaplasia and eosinophil density in the conducting airways were observed. Adjuvant activity of the CeO 2 NPs was primarily mediated via the Th2 response, while that of the Co 3 O 4 NPs was characterised by no or less marked increases in IgE plasma levels, BALF IL-4 and IL-5 concentrations and percentages of eosinophils in BALF and more pronounced increases in BALF IL-6 concentrations and percentages of lymphocytes in BALF. Co-exposure to Co 3 O 4 NPs with OVA and subsequent OVA challenge also induced perivascular and peribronchiolar lymphoid cell accumulation and formation of ectopic lymphoid tissue in lungs. Responses to OVA combined with various NPs were not affected by the amount of doping or redox activity of the NPs.
Conclusions: The findings indicate that chemical composition of NPs influences both the relative potency of NPs to exacerbate allergic airway sensitization and the type of immune response. However, no relation between the acellular redox activity and the observed adjuvant activity of the different NPs was found. Further research is needed to pinpoint the precise physiological properties of NPs and biological mechanisms determining adjuvant activity in order to facilitate a safe-by-design approach to NP development.
Databáze: MEDLINE
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