Data/hora: 21/09/2024 06:14:55

Biblioteca(s): 	Embrapa Gado de Corte.	
Data corrente: 	31/03/2012	
Data da última atualização: 	31/03/2012	
Autoria: 	TRANT, C. G. M. C.; LACERDA, T. L. S.; CARVALHO, N. B.; AZEVEDO, V.; ROSINHA, G. M. S.; SALCEDO, S. P.; GORVEL, J. P.; OLIVEIRA, S. C.	
Afiliação: 	Cyntia G. M. C. Trant, Department of Biochemistry and Immunology - UFMG; Thais L. S. Lacerda, Department of Biochemistry and Immunology - UFMG; Natalia B. Carvalho, Department of Biochemistry and Immunology - UFMG; Vasco Azevedo, Department of General Biology - UFMG; GRACIA MARIA SOARES ROSINHA, CNPGC; Suzana P. Salcedo, Centre d’Immunologie de Marseille-Luminy, Aix Marseille Universite´, Faculte´ de Sciences de Luminy, Marseille, France INSERM, U631, Marseille, France5; and CNRS, UMR6102, Marseille, France; Jean-Pierre Gorvel, Centre d’Immunologie de Marseille-Luminy, Aix Marseille Universite´, Faculte´ de Sciences de Luminy, Marseille, France INSERM, U631, Marseille, France5; and CNRS, UMR6102, Marseille, France; Sergio C. Oliveira, Department of Biochemistry and Immunology - UFMG.	
Título: 	The Brucella abortus phosphoglycerate kinase mutant is highly attenuated and induces protection superior to that of vaccine strain 19 in immunocompromised and immunocompetent mice.	
Ano de publicação: 	2010	
Fonte/Imprenta: 	Infection and Immunity, v. 78, n.5, p. 2283-2291, May 2010.	
Idioma: 	Inglês	
Conteúdo: 	Brucella abortus is a facultative intracellular bacterial pathogen that causes abortion in domestic animals and undulant fever in humans. The mechanism of virulence of Brucella spp. is not yet fully understood. Therefore, it is crucial to identify new molecules that can function as virulence factors to better understand the host-pathogen interplay. Herein, we identified the gene encoding the phosphoglycerate kinase (PGK) of B. abortus strain 2308. To test the role of PGK in Brucella pathogenesis, a pgk deletion mutant was constructed. Replacement of the wild-type pgk by recombination was demonstrated by Southern and Western blot analyses. The B. abortus pgk mutant strain exhibited extreme attenuation in bone marrow-derived macrophages and in vivo in BALB/c, C57BL/6, 129/Sv, and interferon regulatory factor-1 knockout (IRF-1 KO) mice. Additionally, at 24 h postinfection the pgk mutant was not found within the same endoplasmic reticulum-derived compartment as the wild-type bacteria, but, instead, over 60% of Brucella-containing vacuoles (BCVs) retained the late endosomal/lysosomal marker LAMP1. Furthermore, the B. abortus pgk deletion mutant was used as a live vaccine. Challenge experiments revealed that the pgk mutant strain induced protective immunity in 129/Sv or IRF-1 KO mice that was superior to the protection conferred by commercial strain 19 or RB51. Finally, the results shown here demonstrated that Brucella PGK is critical for full bacterial virulence and that a pgk mutant may serve as a potential vaccine candidate in future studies.	
Thesagro: 	Brucella Abortus; Sanidade Animal.	
Categoria do assunto: 	L Ciência Animal e Produtos de Origem Animal	
Registro original: 	Embrapa Gado de Corte (CNPGC)	
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