Yersinia pseudotuberculosis Efficiently Escapes Polymorphonuclear Neutrophils during Early Infection
| Autor: | Anna Fahlgren, Maria Fällman, Linda Westermark |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Lymphoid Tissue
Neutrophils Cell- och molekylärbiologi Immunology Mutant Yersinia pseudotuberculosis Infections Biology Yersinia Microbiology Mice medicine Animals Yersinia pseudotuberculosis Mesenteric lymph nodes Mice Inbred BALB C Cellular Microbiology: Pathogen-Host Cell Molecular Interactions Innate immune system Macrophages Dendritic Cells biology.organism_classification Intestines Infectious Diseases Lymphatic system medicine.anatomical_structure Mutation biology.protein Female Parasitology Protein Tyrosine Phosphatases Antibody Cell and Molecular Biology Bacteria Bacterial Outer Membrane Proteins |
| Zdroj: | Infection and Immunity. 82:1181-1191 |
| ISSN: | 1098-5522 0019-9567 |
| DOI: | 10.1128/iai.01634-13 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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