Imperial College London
Professor Mary Ryan

ProfessorMaryRyan

Faculty of Engineering, Department of Materials

Vice-Dean (Research), Faculty of Engineering
 
 
 
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Contact

 

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

 
 
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Location

 

B338Royal School of MinesSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Sweeney:2015:10.1039/c5nr01496d,
author = {Sweeney, S and Theodorou, IG and Zambianchi, M and Chen, S and Gow, A and Schwander, S and Zhang, JJ and Chung, KF and Shaffer, MS and Ryan, MP and Porter, AE and Tetley, TD},
doi = {10.1039/c5nr01496d},
journal = {Nanoscale},
pages = {10398--10409},
title = {Silver nanowire interactions with primary human alveolar type-II epithelial cell secretions: contrasting bioreactivity with human alveolar type-I and type-II epithelial cells.},
url = {http://dx.doi.org/10.1039/c5nr01496d},
volume = {7},
year = {2015}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Inhaled nanoparticles have a high deposition rate in the alveolar units of the deep lung. The alveolar epithelium is composed of type-I and type-II epithelial cells (ATI and ATII respectively) and is bathed in pulmonary surfactant. The effect of native human ATII cell secretions on nanoparticle toxicity is not known. We investigated the cellular uptake and toxicity of silver nanowires (AgNWs; 70 nm diameter, 1.5 μm length) with human ATI-like cells (TT1), in the absence or presence of Curosurf® (a natural porcine pulmonary surfactant with a low amount of protein) or harvested primary human ATII cell secretions (HAS; containing both the complete lipid as well as the full protein complement of human pulmonary surfactant i.e. SP-A, SP-B, SP-C and SP-D). We hypothesised that Curosurf® or HAS would confer improved protection for TT1 cells, limiting the toxicity of AgNWs. In agreement with our hypothesis, HAS reduced the inflammatory and reactive oxygen species (ROS)-generating potential of AgNWs with exposed TT1 cells. For example, IL-8 release and ROS generation was reduced by 38% and 29%, respectively, resulting in similar levels to that of the non-treated controls. However in contrast to our hypothesis, Curosurf® had no effect. We found a significant reduction in AgNW uptake by TT1 cells in the presence of HAS but not Curosurf. Furthermore, we show that the SP-A and SP-D are likely to be involved in this process as they were found to be specifically bound to the AgNWs. While ATI cells appear to be protected by HAS, evidence suggested that ATII cells, despite no uptake, were vulnerable to AgNW exposure (indicated by increased IL-8 release and ROS generation and decreased intracellular SP-A levels one day post-exposure). This study provides unique findings that may be important for the study of lung epithelial-endothelial translocation of nanoparticles in general and associated toxicity within the alveolar unit.
AU  - Sweeney,S
AU  - Theodorou,IG
AU  - Zambianchi,M
AU  - Chen,S
AU  - Gow,A
AU  - Schwander,S
AU  - Zhang,JJ
AU  - Chung,KF
AU  - Shaffer,MS
AU  - Ryan,MP
AU  - Porter,AE
AU  - Tetley,TD
DO  - 10.1039/c5nr01496d
EP  - 10409
PY  - 2015///
SN  - 2040-3372
SP  - 10398
TI  - Silver nanowire interactions with primary human alveolar type-II epithelial cell secretions: contrasting bioreactivity with human alveolar type-I and type-II epithelial cells.
T2  - Nanoscale
UR  - http://dx.doi.org/10.1039/c5nr01496d
VL  - 7
ER  -
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