Artigo Acesso aberto Produção Nacional Revisado por pares

Humoral and cellular immune responses in mice against secreted and somatic antigens from a Corynebacterium pseudotuberculosis attenuated strain: Immune response against a C. pseudotuberculosis strain

2016; BioMed Central; Volume: 12; Issue: 1 Linguagem: Inglês

10.1186/s12917-016-0811-8

ISSN

1746-6148

Autores

Vera Lúcia Costa Vale, Marcos da Costa Silva, Andréia Pacheco de Souza, Soraya Castro Trindade, Lília Ferreira de Moura‐Costa, Ellen Karla Nobre dos Santos-Lima, Ivana Lúcia de Oliveira Nascimento, Hugo Saba, Edson de Jesus Marquês, Bruno Jean Adrien Paule, Roberto José Meyer Nascimento,

Tópico(s)

Veterinary medicine and infectious diseases

Resumo

Corynebacterium pseudotuberculosis is the etiologic agent of caseous lymphadenitis (CL), a chronic disease that affects goats and sheep. CL is characterized by the formation of granulomas in lymph nodes and other organs, such as the lungs and liver. Current knowledge of CL pathogenesis indicates that the induction of humoral and cellular immune responses are fundamental to disease control. The aim of this study was to evaluate the humoral and cellular immune responses in BALB/c mice inoculated with a C. pseudotuberculosis strain isolated in the state of Bahia, Brazil. The lymphocyte proliferation and in vitro production of IFN-γ, IL-4, IL-10, IL-12 and nitric oxide by spleen cells stimulated with secreted and somatic antigens from the studied strain were evaluated. IgG subclasses were also analyzed. Results showed a significant increase of Th1-profile cytokines after 60 days post-inoculation, as well as an important humoral response, represented by high levels of IgG2a and IgG1 against C. pseudotuberculosis. The T1 strain of C. pseudotuberculosis was shown to induce humoral and cellular immune responses in BALB/c mice, but, even at a dosage of 1x107 CFU, no signs of the disease were observed.

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