Imperial College London

ProfessorMaryRyan

Faculty of EngineeringDepartment of Materials

Vice-Dean (Research), Faculty of Engineering
 
 
 
//

Contact

 

+44 (0)20 7594 6755m.p.ryan

 
 
//

Location

 

B338Royal School of MinesSouth Kensington Campus

//

Summary

 

Publications

Citation

BibTex format

@article{Sweeney:2016:10.1016/j.colsurfb.2016.04.040,
author = {Sweeney, S and Leo, BF and Chen, S and Abraham-Thomas, N and Thorley, AJ and Gow, A and Schwander, S and Zhang, JJ and Shaffer, MS and Chung, KF and Ryan, MP and Porter, AE and Tetley, TD},
doi = {10.1016/j.colsurfb.2016.04.040},
journal = {Colloids and Surfaces B - Biointerfaces},
pages = {167--175},
title = {Pulmonary surfactant mitigates silver nanoparticle toxicity in human alveolar type-I-like epithelial cells.},
url = {http://dx.doi.org/10.1016/j.colsurfb.2016.04.040},
volume = {145},
year = {2016}
}

RIS format (EndNote, RefMan)

TY  - JOUR
AB - Accompanying increased commercial applications and production of silver nanomaterials is an increased probability of human exposure, with inhalation a key route. Nanomaterials that deposit in the pulmonary alveolar region following inhalation will interact firstly with pulmonary surfactant before they interact with the alveolar epithelium. It is therefore critical to understand the effects of human pulmonary surfactant when evaluating the inhalation toxicity of silver nanoparticles. In this study, we evaluated the toxicity of AgNPs on human alveolar type-I-like epithelial (TT1) cells in the absence and presence of Curosurf(®) (a natural pulmonary surfactant substitute), hypothesising that the pulmonary surfactant would act to modify toxicity. We demonstrated that 20nm citrate-capped AgNPs induce toxicity in human alveolar type I-like epithelial cells and, in agreement with our hypothesis, that pulmonary surfactant acts to mitigate this toxicity, possibly through reducing AgNP dissolution into cytotoxic Ag(+) ions. For example, IL-6 and IL-8 release by TT1 cells significantly increased 10.7- and 35-fold, respectively (P<0.01), 24h after treatment with 25μg/ml AgNPs. In contrast, following pre-incubation of AgNPs with Curosurf(®), this effect was almost completely abolished. We further determined that the mechanism of this toxicity is likely associated with Ag(+) ion release and lysosomal disruption, but not with increased reactive oxygen species generation. This study provides a critical understanding of the toxicity of AgNPs in target human alveolar type-I-like epithelial cells and the role of pulmonary surfactant in mitigating this toxicity. The observations reported have important implications for the manufacture and application of AgNPs, in particular for applications involving use of aerosolised AgNPs.
AU - Sweeney,S
AU - Leo,BF
AU - Chen,S
AU - Abraham-Thomas,N
AU - Thorley,AJ
AU - Gow,A
AU - Schwander,S
AU - Zhang,JJ
AU - Shaffer,MS
AU - Chung,KF
AU - Ryan,MP
AU - Porter,AE
AU - Tetley,TD
DO - 10.1016/j.colsurfb.2016.04.040
EP - 175
PY - 2016///
SN - 1873-4367
SP - 167
TI - Pulmonary surfactant mitigates silver nanoparticle toxicity in human alveolar type-I-like epithelial cells.
T2 - Colloids and Surfaces B - Biointerfaces
UR - http://dx.doi.org/10.1016/j.colsurfb.2016.04.040
VL - 145
ER -