Format

Send to

Choose Destination
Nat Nanotechnol. 2016 Sep;11(9):808-16. doi: 10.1038/nnano.2016.88. Epub 2016 May 30.

Metal nanoparticles in the presence of lipopolysaccharides trigger the onset of metal allergy in mice.

Author information

1
Laboratory of Toxicology and Safety Science, Graduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
2
Vaccine Creation Project, BIKEN Innovative Vaccine Research Alliance Laboratories, Research Institute for Microbial Diseases, Osaka University, 3-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
3
BIKEN Center for Innovative Vaccine Research and Development, The Research Foundation for Microbial Diseases of Osaka University, 3-1 Yamadaoka, Suita, Osaka 565-0871, Japan.
4
Laboratory of Biopharmaceutical Research, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saitoasagi, Ibaraki, Osaka 567-0085, Japan.
5
Laboratory of Innovative Antibody Engineering and Design, Center for Drug Innovation and Screening, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saitoasagi, Ibaraki, Osaka 567-0085, Japan.
6
The Center for Advanced Medical Engineering and Informatics, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan.
7
Laboratory of Adjuvant Innovation, National Institutes of Biomedical Innovation, Health and Nutrition, 7-6-8 Saitoasagi, Ibaraki, Osaka 567-0085, Japan.
8
Laboratory of Vaccine Science, Immunology Frontier Research Center, World Premier International Research Center, Osaka University, 3-1 Suita, Osaka 565-0871, Japan.

Abstract

Many people suffer from metal allergy, and the recently demonstrated presence of naturally occurring metal nanoparticles in our environment could present a new candidate for inducing metal allergy. Here, we show that mice pretreated with silver nanoparticles (nAg) and lipopolysaccharides, but not with the silver ions that are thought to cause allergies, developed allergic inflammation in response to the silver. nAg-induced acquired immune responses depended on CD4(+) T cells and elicited IL-17A-mediated inflammation, similar to that observed in human metal allergy. Nickel nanoparticles also caused sensitization in the mice, whereas gold and silica nanoparticles, which are minimally ionizable, did not. Quantitative analysis of the silver distribution suggested that small nAg (≤10 nm) transferred to the draining lymph node and released ions more readily than large nAg (>10 nm). These results suggest that metal nanoparticles served as ion carriers to enable metal sensitization. Our data demonstrate a potentially new trigger for metal allergy.

PMID:
27240418
DOI:
10.1038/nnano.2016.88
[Indexed for MEDLINE]

Supplemental Content

Loading ...
Support Center