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A single exposure to iron oxide nanoparticles attenuates antigen-specific antibody production and T-cell reactivity in ovalbumin-sensitized BALB/c mice

Authors Shen CC, Wang CC, Liao MH, Jan TR

Published 20 June 2011 Volume 2011:6 Pages 1229—1235

DOI https://doi.org/10.2147/IJN.S21019

Review by Single-blind

Peer reviewer comments 4

Chien-Chang Shen1, Chia-Chi Wang1, Mei-Hsiu Liao2, Tong-Rong Jan1
1Department and Graduate Institute of Veterinary Medicine, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan; 2Division of Isotope Application, Institute of Energy Research, Taoyuan, Taiwan

Background: Superparamagnetic iron oxide nanoparticles have been used in clinical applications as a diagnostic contrasting agent. Previous studies showed that iron oxide nanoparticles deposited in the liver and spleen after systemic administration. The present study investigated the effect of iron oxide nanoparticles on antigen-specific immune responses in mice sensitized with the T cell-dependent antigen ovalbumin (OVA).
Methods: BALB/c mice were intravenously administered with a single dose of iron oxide nanoparticles (10-60 mg Fe/kg) 1 hour prior to OVA sensitization, and the serum antibody production and splenocyte reactivity were examined 7 days later.
Results: The serum levels of OVA-specific IgG1 and IgG2a were significantly attenuated by treatment with iron oxide nanoparticles. The production of interferon-γ and interleukin-4 by splenocytes re-stimulated with OVA in culture was robustly suppressed in mice administered with iron oxide nanoparticles. The viability of OVA-stimulated splenocytes was also attenuated. In contrast, treatment with iron oxide nanoparticles did not affect the viability of splenocytes stimulated with concanavalin A, a T-cell mitogen.
Conclusion: Collectively, these data indicate that systemic exposure to a single dose of iron oxide nanoparticles compromises subsequent antigen-specific immune reactions, including the serum production of antigen-specific antibodies, and the functionality of T cells.

Keywords: iron oxide nanoparticle, antigen-specific, immune, ovalbumin

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