Document Detail

Silver and fullerene nanoparticles' effect on interleukin-2-dependent proliferation of CD4 (+) T cells.
MedLine Citation:
PMID:  25172299     Owner:  NLM     Status:  Publisher    
Immunotoxicity studies of nanoparticles on T cells addressed their effects on activation by T antigen receptor, but have neglected the regulation of proliferation by IL-2. In this study, the IL-2-dependent T lymphoblastoid WE17/10 cell line was used to compare silver (Ag-NPs) and fullerene (C60-NPs) nanoparticles' toxicity and evaluate whether these NPs could interfere with IL-2-dependent proliferation. Results have shown that Ag-NPs are more toxic, as they reduced cell viability at the highest concentration tested (100 μg/ml), while C60-NPs have shown good biocompatibility. Characterization of NP suspensions by dynamic light scattering measured large aggregates for C60-NPs, whereas Ag-NPs were relatively stable and well dispersed. This translated into a much larger uptake of Ag-NPs compared to C60-NPs, as measured by flow cytometry. Proliferation measurements by CFSE following 72h incubation have shown that Ag-NPs decrease cell proliferation and C60-NPs slightly increase proliferation. CD25 expression was unchanged following exposure to C60-NPs, but was significantly increased by Ag-NPs' presence for short and long-term incubations. Analyses of three key signaling proteins activated by IL-2 receptor (Stat5, JNK and ERK1/2) by western immunoblotting have shown no effects from either NPs on Stat5 and JNK phosphorylation. ERK1/2 was slightly activated following a short exposure to Ag-NPs, while C60-NPs had no effect. Our results show that C60-NPs have good biocompatibility and don't interfere with IL-2-dependent proliferation. A deeper investigation would be needed for the case of Ag-NPs, since the mechanism of their action is still unclear.
Guillaume Côté-Maurais; Jacques Bernier
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-8-26
Journal Detail:
Title:  Toxicology in vitro : an international journal published in association with BIBRA     Volume:  -     ISSN:  1879-3177     ISO Abbreviation:  Toxicol In Vitro     Publication Date:  2014 Aug 
Date Detail:
Created Date:  2014-8-30     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8712158     Medline TA:  Toxicol In Vitro     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014. Published by Elsevier Ltd.
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