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Yersinia enterocolitica subsp. palearctica YE-149

ABSTRACT: Yersinia enterocolitica subsp. palearctica YE-149 Genome sequencing and assembly

PROVIDER: PRJNA200684 | ENA |

REPOSITORIES: ENA

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Dataset's files

Source:

			Action	DRS
	ASHV01.dat.gz	Other
	ASHV01.fasta.gz	Fasta.gz
	ASHV01.master.dat	Other
	ASHV01.dat.gz	Other

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IFN-g counteracts YopH mediated immune evasion in Yersinia enterocolitica infection in mice

Project description:Background: Yersinia outer protein (Yop) H is a secreted virulence factor of Yersinia enterocolitica which inhibits phagocytosis of Y. enterocolitica and promotes virulence of Y. enterocolitica (Ye) in mice. The aim of this study was to address whether and how YopH affects the innate immune response against Ye in mice. Results: For this purpose mice were infected with wild type Ye (pYV+) or a YopH-deficient Ye mutant strain (DyopH). CD11b+ cells were isolated from infected spleen and subjected to gene expression analysis using microarrays. Despite attenuation of DyopH in vivo, by variation of infection doses we were able to achieve conditions that allow comparison of gene expression in pYV+ and DyopH infections at either comparable infection courses or splenic bacterial burden. Gene expression analysis provided evidence that expression levels of several immune response genes including IFN-g and IL-6 are high after pYV+ infection but low after sublethal DyopH infection. In line with these findings, infection of IFN-gR-/- and IL-6-/- mice with pYV+ or DyopH revealed that these cytokines are dispensable for control of DyopH, but not pYV+ infection. Consistently, in bacteria killing assays with BMM in vitro, stimulation of BMM with IFN-g is required for killing of pYV+ but not DyopH. Conclusion: In conclusion, this data suggest that IFN-g counteracts YopH-mediated virulence mechanisms of Ye which in Ye wild type infection contribute to evasion of the innate immune response including killing by macrophages. Keywords: Comparison of gene expression due to bacterial virulence factors

2008-04-17 | GSE11189 | GEO

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