Comparative study on alginate/chitosan microcapsules and Montanide ISA 61 as vaccine adjuvants in mice.

Comparative study on alginate/chitosan microcapsules and Montanide ISA 61 as vaccine adjuvants in mice.

Selection of adjuvant to be combined with the antigen is an extremely important point for formulating effective vaccines. The aim of this study was to evaluate reactogenicity, levels of IgM, IgG and subclasses (IgG1, IgG2b and IgG3), and protection elicited by vaccine formulations with association of chitosan coated alginate or Montanide ISA 61 with γ-irradiated Brucella ovis. The alginate/chitosan biopolymers as well as the Montanide ISA 61 emulsion elicited intense and long-lasting local response, especially when associated with the antigen. However, Montanide ISA 61 induced less intense reactogenicity when compared to alginate/chitosan. Furthermore, γ-irradiated B. ovis with Montanide ISA 61 induced higher levels of IgG2b an important marker of cellular immune response. In conclusion, Montanide ISA 61 resulted in milder reactogenicity when compared to the alginate/chitosan, while it induced a high IgG2b/IgG1 ratio compatible with a Th1 profile response.

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Bibliographic Details
Main Authors: SILVA, L. A., SOUZA, M. F., CARVALHO, T. P., SANTANA, C. H., GUEDES, A. C., OLIVEIRA, J. B. S., LIMA, P. A. de, NOGUEIRA, P. R. A., BRANDAO, H. de M., PAIXÃO, T. A. da, SANTOS, R. L.
Other Authors: LAICE A. SILVA, UNIVERSIDADE FEDERAL DE MINAS GERAIS; MONIQUE F. SOUZA, UNIVERSIDADE FEDERAL DE MINAS GERAIS; THAYNARA P. CARVALHO, UNIVERSIDADE FEDERAL DE MINAS GERAIS; CLARISSA H. SANTANA, UNIVERSIDADE FEDERAL DE MINAS GERAIS; ANDRESSA C. GUEDES, UNIVERSIDADE FEDERAL DE MINAS GERAIS; JEFFERSON BRUNO S. OLIVEIRA, UNIVERSIDADE FEDERAL DE MINAS GERAIS; PAMELA A. DE LIMA, UNIVERSIDADE FEDERAL DE MINAS GERAIS; PAULO ROBERTO A. NOGUEIRA, UNIVERSIDADE FEDERAL DE MINAS GERAIS; HUMBERTO DE MELLO BRANDAO, CNPGL; TATIANE A. DA PAIXÃO, UNIVERSIDADE FEDERAL DE MINAS GERAIS; RENATO LIMA SANTOS, UNIVERSIDADE FEDERAL DE MINAS GERAIS.
Format: Artigo de periódico biblioteca
Language:eng
Published: 2024-06-26
Subjects:Alginato, Quitosana, Vacina, Antígeno,
Online Access:http://www.alice.cnptia.embrapa.br/alice/handle/doc/1165139
https://doi.org/10.1371/journal.pone.0298117
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Summary:Selection of adjuvant to be combined with the antigen is an extremely important point for formulating effective vaccines. The aim of this study was to evaluate reactogenicity, levels of IgM, IgG and subclasses (IgG1, IgG2b and IgG3), and protection elicited by vaccine formulations with association of chitosan coated alginate or Montanide ISA 61 with γ-irradiated Brucella ovis. The alginate/chitosan biopolymers as well as the Montanide ISA 61 emulsion elicited intense and long-lasting local response, especially when associated with the antigen. However, Montanide ISA 61 induced less intense reactogenicity when compared to alginate/chitosan. Furthermore, γ-irradiated B. ovis with Montanide ISA 61 induced higher levels of IgG2b an important marker of cellular immune response. In conclusion, Montanide ISA 61 resulted in milder reactogenicity when compared to the alginate/chitosan, while it induced a high IgG2b/IgG1 ratio compatible with a Th1 profile response.

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