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MYD88-DEPENDENT PROTECTIVE IMMUNITY ELICITED BY ADENOVIRUS 5 EXPRESSING THE SURFACE ANTIGEN 1 FROM TOXOPLASMA GONDII IS MEDIATED BY CD8(+) T LYMPHOCYTES
Myeloid Differentiation
Factor 88/immunology
Toxoplasmosis
Animal/parasitology
Protozoan Vaccines
Autor
Afiliación
Universidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Bioquímica e Imunologia. Belo Horizonte, MG, Brazil
University of Massachusetts Medical School. Division of Infectious Disease and Immunology. Worcester, MA, USA
Universidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Bioquímica e Imunologia. Belo Horizonte, MG, Brazil
Universidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Microbiologia. Belo Horizonte, MG, Brazil
Universidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Bioquímica e Imunologia. Belo Horizonte, MG, Brazil/University of Massachusetts Medical School. Division of Infectious Disease and Immunology. Worcester, MA, USA/Fundação Oswaldo Cruz. Centro de Pesquisas René Rachou. Belo Horizonte, MG, Brasil
University of Massachusetts Medical School. Division of Infectious Disease and Immunology. Worcester, MA, USA
Universidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Bioquímica e Imunologia. Belo Horizonte, MG, Brazil
Universidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Microbiologia. Belo Horizonte, MG, Brazil
Universidade Federal de Minas Gerais. Instituto de Ciências Biológicas. Departamento de Bioquímica e Imunologia. Belo Horizonte, MG, Brazil/University of Massachusetts Medical School. Division of Infectious Disease and Immunology. Worcester, MA, USA/Fundação Oswaldo Cruz. Centro de Pesquisas René Rachou. Belo Horizonte, MG, Brasil
Resumen en ingles
Toxoplasma gondii is an intracellular parasite widely spread around the world. The Surface Antigens (SAG) 1, 2 and 3 are the main proteins expressed on the surface of T. gondii tachyzoites. Replication-defective adenovirus serotype 5 (rAd5) is one of the most potent recombinant viral vectors for eliciting T cell-mediated immunity in mice and humans. Here we show that vaccination with rAd5 expressing SAG1 (AdSAG1), but neither SAG2 nor SAG3, induces protective immunity in the highly susceptible C57BL/6 mice challenged with T. gondii. Furthermore, we evaluated different immunological components involved on viral induced protective immunity. We observed that host protection elicited by AdSAG1 is highly dependent on IL-12, IFN-γ and CD8+ T lymphocytes. Importantly, the induction of protective immunity (T cell-derived IFN-γ) was also dependent on Myeloid Differentiation Factor 88 (MyD88), and thus, likely to involve Toll-Like receptors. We conclude that protective parasite specific-CD8+ T cells are elicited by a mechanism that involves MyD88-dependent induction of IL-12.
Palabras clave en ingles
Adenoviridae/metabolismMyeloid Differentiation
Factor 88/immunology
Toxoplasmosis
Animal/parasitology
Protozoan Vaccines
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