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Yersinia pseudotuberculosis Efficiently Escapes Polymorphonuclear Neutrophils during Early Infection
Umeå University, Faculty of Medicine, Department of Molecular Biology (Faculty of Medicine). Umeå University, Faculty of Medicine, Umeå Centre for Microbial Research (UCMR). Umeå University, Faculty of Medicine, Molecular Infection Medicine Sweden (MIMS).
Umeå University, Faculty of Medicine, Department of Molecular Biology (Faculty of Medicine).
Umeå University, Faculty of Medicine, Department of Molecular Biology (Faculty of Medicine).
2014 (English)In: Infection and Immunity, ISSN 0019-9567, E-ISSN 1098-5522, Vol. 82, no 3, 1181-1191 p.Article in journal (Refereed) Published
Abstract [en]

The human-pathogenic species of the Gram-negative genus Yersinia preferentially target and inactivate cells of the innate immune defense, suggesting that this is a critical step by which these bacteria avoid elimination and cause disease. In this study, bacterial interactions with dendritic cells, macrophages, and polymorphonuclear neutrophils (PMNs) in intestinal lymphoid tissues during early Yersinia pseudotuberculosis infection were analyzed. Wild-type bacteria were shown to interact mainly with dendritic cells, but not with PMNs, on day 1 postinfection, while avirulent yopH and yopE mutants interacted with PMNs as well as with dendritic cells. To unravel the role of PMNs during the early phase of infection, we depleted mice of PMNs by using an anti-Ly6G antibody, after which we could see more-efficient initial colonization by the wild-type strain as well as by yopH, yopE, and yopK mutants on day 1 postinfection. Dissemination of yopH, yopE, and yopK mutants from the intestinal compartments to mesenteric lymph nodes was faster in PMN-depleted mice than in undepleted mice, emphasizing the importance of effective targeting of PMNs by these Yersinia outer proteins (Yops). In conclusion, escape from interaction with PMNs due to the action of YopH, YopE, and YopK is a key feature of pathogenic Yersinia species that allows colonization and effective dissemination.

Place, publisher, year, edition, pages
2014. Vol. 82, no 3, 1181-1191 p.
National Category
Cell and Molecular Biology
Identifiers
URN: urn:nbn:se:umu:diva-88290DOI: 10.1128/IAI.01634-13ISI: 000333190900029PubMedID: 24379291OAI: oai:DiVA.org:umu-88290DiVA: diva2:715291
Available from: 2014-05-02 Created: 2014-04-29 Last updated: 2017-12-05Bibliographically approved

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Westermark, LindaFahlgren, AnnaFällman, Maria
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Department of Molecular Biology (Faculty of Medicine)Umeå Centre for Microbial Research (UCMR)Molecular Infection Medicine Sweden (MIMS)
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