A vaccine based on a mutant transferrin binding protein B of Haemophilus parasuis induces a strong T-helper 2 response and bacterial clearance after experimental infection

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A vaccine based on a mutant transferrin binding protein B of Haemophilus parasuis induces a strong T-helper 2 response and bacterial clearance after experimental infection

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Título: A vaccine based on a mutant transferrin binding protein B of Haemophilus parasuis induces a strong T-helper 2 response and bacterial clearance after experimental infection
Autor: Martínez Martínez, Sonia;Frandoloso, Rafael;Rodríguez Ferri, Elías Fernando;García-Iglesias, María-José;Pérez-Martínez, Claudia;Álvarez Estrada, Álvaro;Gutiérrez Martín, César Bernardo
Facultad/Centro: Facultad de Veterinaria
Area de conocimiento: Sanidad Animal
Resumen: This study aimed to characterize the type of immune response induced by an experimental vaccine based on a mutant Haemophilus parasuis transferrin binding protein (Tbp) B (Y167A) defective in its ability to bind porcine transferrin. Clinical and pathological signs, bacterial clearance, antibody response and the cytokine profile in alveolar macrophages and spleen after the vaccination and challenge of twenty-two colostrum-deprived pigs with 108 CFU of H. parasuis were analysed. Pigs vaccinated with Y167A were compared to those vaccinated with native TbpB (nTbpB), those treated with a commercial bacterin (CB) against Glässer's disease, those unvaccinated challenged (CH) and those unvaccinated unchallenged (UNCH) pigs. The rectal temperatures of Y167A pigs resembled those of UNCH pigs and were significantly lower than those of the nTbpB, CB and CH animals. A major reduction in pathological changes of the challenged pigs was observed in the Y167A group. H. parasuis was cleared from 88.9% of the samples from Y167A pigs versus 60.0% and 55.6% from those of the CB and nTbpB groups, respectively. The antibody response elicited by Y167A by ELISA was notably higher than that observed for nTbpB and CB pigs and was capable of preventing the expression and secretion of IL-8. The expression of IL-4 and IL-5, which were associated with the specific antibody levels, suggests that the main mechanism of protection conferred by Y167A vaccine is based on a strong T-helper 2 response
Descripción física: 9 p.
Revisión por pares: SI
Editor: Elsevier
Datos: Veterinary Immunology and Immunopathology, 2016
URI: http://hdl.handle.net/10612/6816
Fecha: 2016-07-23
Tipo: info:eu-repo/semantics/article
Materia: Sanidad animal
Palabras clave: Haemophilus parasuis
Glässer's disease
Mutant TbpB vaccine
Bacterial clearance
Antibodies
Cytokines
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