Interleukin-6 and interleukin-12 participate in induction of a type 1 protective T-cell response during vaccination with a tuberculosis subunit vaccine

• Tipo: Artigo em Revista Científica Internacional
• Data: 1999

Autores

Leal, IS (Autor) Outra; Smedegard, B (Autor) Outra; Andersen, P (Autor) Outra; Appelberg, R (Autor) ICBAS

Revista

Título: Infection and Immunity

Vol. 67

Páginas: 5747-5754

ISSN: 0019-9567

Editora: American Society for Microbiology

Indexação

ISI Web of Knowledge - 57 Citações

Scopus - 61 Citações

Classificação Científica

FOS: Ciências médicas e da saúde > Medicina básica

Outras Informações

ID Authenticus: P-001-2Z3

Abstract (EN): We examined the role of cytokines in the development of gamma interferon (IFN-gamma)-secreting protective T cells following immunization with a culture filtrate subunit vaccine against Mycobacterium tuberculosis containing the adjuvant dimethyldioctadecylammonium bromide (DDA). Depletion of either interleukin-6 (IL-6) or IL-12 with specific neutralizing antibodies during vaccination reduced the priming of T cells for antigen-Specific proliferation and IFN-gamma secretion. Such reduction was also observed in IL-6 gene-disrupted mice as compared to wild-type animals. IL-6 was found to play a role in the initial differentiation of Th1 cells but not in their expansion. The defect found after IL-6 depletion or in IL-6-knockout mice was compensated by the inclusion of recombinant mouse IL-12 in the vaccine. The induction of protective immunity against an intravenous or an aerosol challenge with live, virulent M. tuberculosis was markedly reduced by neutralizing either IL-6 or IL-12 during immunization with the vaccine. Likewise, the effects of IL-6 neutralization were partially reversed by including IL-12 in the vaccine. Our data point to an important role of IL-6 and IL-12 in the generation of cell-mediated immunity to tuberculosis.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8