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Fabrication of nanoadjuvant with poly-e-caprolactone (PCL) for developing a single-shot vaccine providing prolonged immunity

Authors Prashant CK, Bhat M, Srivastava SK, Saxena A, Kumar M, Singh A, Samim M, Ahmad FJ, Dinda AK

Received 13 October 2013

Accepted for publication 6 December 2013

Published 12 February 2014 Volume 2014:9(1) Pages 937—950

DOI https://doi.org/10.2147/IJN.S55892

Checked for plagiarism Yes

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Peer reviewer comments 3

Video abstract presented by Professor Amit Kumar Dinda

Views: 171

Chandravilas Keshvan Prashant,1 Madhusudan Bhat,1 Sandeep Kumar Srivastava,1 Ankit Saxena,2 Manoj Kumar,3 Amar Singh,2 Mohammed Samim,4 Farhan Jalees Ahmad,5 Amit Kumar Dinda1

1Department of Pathology, 2Department of Transplant Immunology and Immunogenetics, All India Institute of Medical Sciences, 3Centre for Biomedical Engineering, Indian Institute of Technology, 4Department of Chemistry, Faculty of Sciences, 5Department of Pharmaceutics, Faculty of Pharmacy, Jamia Hamdard, New Delhi, India

Purpose: The aim of the study was to load a model antigen, tetanus toxoid (TT), in poly-ε-caprolactone nanoparticles (PCL NPs) of two size ranges, ie, mean 61.2 nm (small) and 467.6 nm (large), and study its effect on macrophage polarization as well as antigen presentation in human monocyte-derived macrophages in vitro, along with humoral and cell-mediated immune (CMI) response generated in Swiss albino mice following immunization with the TT-loaded NPs.
Materials and methods: PCL NPs were synthesized by solvent evaporation. The antigen-loaded PCL NPs were characterized for size, zeta potential, and protein-release kinetics. Swiss albino mice were immunized with the antigen-loaded PCL NPs. Flow cytometry was used to quantify interferon-γ- and interleukin-4-secreting cluster of differentiation (CD)4+ and CD8+ T cells in the spleen, and enzyme-linked immunosorbent assay was used to quantify anti-TT antibody levels in the serum of immunized mice.
Results: Small PCL NPs generated an M1/M2 type polarization of human blood monocyte-derived macrophages and T helper (Th)1/Th2 polarization of autologous CD4+ T cells. Efficient CD8+ T-cell responses were also elicited. Large PCL NPs failed to cause any type of macrophage polarization. They did not elicit efficient CD8+ T-cell responses.
Conclusion: TT-loaded small PCL NPs were able to generate persistent and strong CMI and humoral responses against TT 2 months after single injection in mice without booster dose. This biodegradable nanoadjuvant system may help to develop single-shot immunization for prolonged immunity without booster doses. The capability of enhanced CMI response may have high translational potential for immunization against intracellular infection.

Keywords: tetanus toxoid, antigen cross-presentation, poly-ε-caprolactone nanoparticles, vaccine, adjuvant

Corrigendum for this paper has been published


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Fabrication of nanoadjuvant with poly-ɛ-caprolactone (PCL) for developing a single-shot vaccine providing prolonged immunity [Corrigendum]

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