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Bosák J, Micenková L, Hrala M, Pomorská K, Kunova Bosakova M, Krejci P, Göpfert E, Faldyna M, Šmajs D. Colicin F Y inhibits pathogenic Yersinia enterocolitica in mice. Sci Rep 2018; 8:12242. [PMID: 30115964 PMCID: PMC6095899 DOI: 10.1038/s41598-018-30729-7] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 08/06/2018] [Indexed: 12/26/2022] Open
Abstract
Yersiniosis belongs to the common foodborne diseases around the world, and frequently manifests as diarrhea that can be treated with probiotics. Colicin FY is an antibacterial agent produced by bacteria and it is capable of specific growth inhibition of Yersinia enterocolitica, the causative agent of gastrointestinal yersiniosis. In this study, recombinant E. coli producing colicin FY were constructed, using both known probiotic strains EcH22 and EcColinfant, and the newly isolated murine strains Ec1127 and Ec1145. All E. coli strains producing colicin FY inhibited growth of pathogenic Y. enterocolitica during co-cultivation in vitro. In dysbiotic mice treated with streptomycin, E. coli strains producing colicin FY inhibited progression of Y. enterocolitica infections. This growth inhibition was not observed in mice with normal gut microflora, likely due to insufficient colonization capacity of E. coli strains and/or due to spatial differences in intestinal niches. Isogenic Y. enterocolitica producing colicin FY was constructed and shown to inhibit pathogenic Y. enterocolitica in mice with normal microflora. Evidence of in vivo antimicrobial activity of colicin FY may have utility in the treatment of Y. enterocolitica infections.
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Affiliation(s)
- Juraj Bosák
- Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Lenka Micenková
- Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Matěj Hrala
- Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Katarína Pomorská
- Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | | | - Pavel Krejci
- Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | | | | | - David Šmajs
- Department of Biology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.
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Alenizi D, Ringwood T, Redhwan A, Bouraha B, Wren BW, Prentice M, McNally A. All Yersinia enterocolitica are pathogenic: virulence of phylogroup 1 Y. enterocolitica in a Galleria mellonella infection model. MICROBIOLOGY-SGM 2016; 162:1379-1387. [PMID: 27221796 DOI: 10.1099/mic.0.000311] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Yersinia enterocolitica is a zoonotic pathogen and a common cause of gastroenteritis in humans. The species is composed of six diverse phylogroups, of which strains of phylogroup 1 are considered non-pathogenic to mammals due to the lack of the major virulence plasmid pYV, and their lack of virulence in a mouse infection model. In the present report we present data examining the pathogenicity of strains of Y. enterocolitica across all six phylogroups in a Galleria mellonellla model. We have demonstrated that in this model strains of phylogroup 1 exhibit severe pathogenesis with a lethal dose of as low as 10 c.f.u., that this virulence is an active process and that flagella play a major role in the virulence phenotype. We have also demonstrated that the complete lack of virulence in Galleria of the mammalian pathogenic phylogroups is not due to carriage of the pYV virulence plasmid. Our data suggest that all Y. enterocolitica can be pathogenic, which may be a reflection of the true natural habitat of the species, and that we may need to reconsider the eco-evo perspective of this important bacterial species.
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Affiliation(s)
- Dhahi Alenizi
- Nottingham Trent University, Pathogen Research Group, Clifton Lane, Nottingham NG11 8NS, UK
| | - Tamara Ringwood
- Department of Microbiology, University College Cork, Cork, Ireland
| | - Alya Redhwan
- Nottingham Trent University, Pathogen Research Group, Clifton Lane, Nottingham NG11 8NS, UK
| | - Bouchra Bouraha
- Nottingham Trent University, Pathogen Research Group, Clifton Lane, Nottingham NG11 8NS, UK
| | - Brendan W Wren
- Department of Pathogen Molecular Biology, London School of Hygiene and Tropical Medicine, Keppel Street, London WC1E 7HT, UK
| | - Michael Prentice
- Department of Microbiology, University College Cork, Cork, Ireland
| | - Alan McNally
- Nottingham Trent University, Pathogen Research Group, Clifton Lane, Nottingham NG11 8NS, UK
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De Montijo-Prieto S, Moreno E, Bergillos-Meca T, Lasserrot A, Ruiz-López MD, Ruiz-Bravo A, Jiménez-Valera M. A Lactobacillus plantarum strain isolated from kefir protects against intestinal infection with Yersinia enterocolitica O9 and modulates immunity in mice. Res Microbiol 2015; 166:626-32. [PMID: 26272025 DOI: 10.1016/j.resmic.2015.07.010] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Revised: 07/20/2015] [Accepted: 07/20/2015] [Indexed: 12/29/2022]
Abstract
Lactobacillus plantarum C4, previously isolated from kefir and characterized as a potential probiotic strain, was tested for its protective and immunomodulatory capacity in a murine model of yersiniosis. The inoculation of BALB/c mice with a low pathogenicity serotype O9 strain of Yersinia enterocolitica results in a prolonged intestinal infection with colonization of Peyer's patches. Pretreatment with C4 was without effect on fecal excretion of yersiniae, but shortened the colonization of Peyer's patches. This protective effect was associated with pro-inflammatory status in the intestinal mucosa (TNF-α production in infected mice was increased by C4) and an increase in total IgA secretion. At a systemic level, C4 did not promote a pro-inflammatory response, although production of the immunoregulatory cytokine IFN-γ was enhanced. These findings suggest that L. plantarum C4 can increase resistance to intestinal infections through its immunomodulatory activity.
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Affiliation(s)
- Soumi De Montijo-Prieto
- Department of Microbiology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain.
| | - Encarnación Moreno
- Department of Microbiology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain.
| | - Triana Bergillos-Meca
- Department of Nutrition and Bromatology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain.
| | - Agustín Lasserrot
- Biotmicrogren S. L., Parque tecnológico de Ciencias de la Salud, BIC nave 6, 18100, Armilla, Granada, Spain.
| | - María-Dolores Ruiz-López
- Department of Nutrition and Bromatology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain.
| | - Alfonso Ruiz-Bravo
- Department of Microbiology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain.
| | - María Jiménez-Valera
- Department of Microbiology, Faculty of Pharmacy, University of Granada, 18071 Granada, Spain.
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Colonization of cecum is important for development of persistent infection by Yersinia pseudotuberculosis. Infect Immun 2014; 82:3471-82. [PMID: 24891107 DOI: 10.1128/iai.01793-14] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Yersiniosis is a human disease caused by the bacterium Yersinia pseudotuberculosis or Yersinia enterocolitica. The infection is usually resolved but can lead to postinfectious sequelae, including reactive arthritis and erythema nodosum. The commonly used Yersinia mouse infection model mimics acute infection in humans to some extent but leads to systemic infection and eventual death. Here, we analyzed sublethal infection doses of Y. pseudotuberculosis in mice in real time using bioluminescent imaging and found that infections using these lower doses result in extended periods of asymptomatic infections in a fraction of mice. In a search for the site for bacterial persistence, we found that the cecum was the primary colonization site and was the site where the organism resided during a 115-day infection period. Persistent infection was accompanied by sustained fecal shedding of cultivable bacteria. Cecal patches were identified as the primary site for cecal colonization during persistence. Y. pseudotuberculosis bacteria were present in inflammatory lesions, in localized foci, or as single cells and also in neutrophil exudates in the cecal lumen. The chronically colonized cecum may serve as a reservoir for dissemination of infection to extraintestinal sites, and a chronic inflammatory state may trigger the onset of postinfectious sequelae. This novel mouse model for bacterial persistence in cecum has potential as an investigative tool to unveil a deeper understanding of bacterial adaptation and host immune defense mechanisms during persistent infection.
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Masuya H. Roles and applications of biomedical ontologies in experimental animal science. Exp Anim 2012; 61:365-73. [PMID: 22850636 DOI: 10.1538/expanim.61.365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
A huge amount of experimental data from past studies has played a vital role in the development of new knowledge and technologies in biomedical science. The importance of computational technologies for the reuse of data, data integration, and knowledge discoveries has also increased, providing means of processing large amounts of data. In recent years, information technologies related to "ontologies" have played more significant roles in the standardization, integration, and knowledge representation of biomedical information. This review paper outlines the history of data integration in biomedical science and its recent trends in relation to the field of experimental animal science.
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Affiliation(s)
- Hiroshi Masuya
- Technology and Development Unit for Knowledge Base of Mouse Phenotype, RIKEN BioResource Center, 3–1–1 Kouyadai, Tsukuba 305-0074, Japan
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Schippers A, Leuker C, Pabst O, Kochut A, Prochnow B, Gruber AD, Leung E, Krissansen GW, Wagner N, Müller W. Mucosal addressin cell-adhesion molecule-1 controls plasma-cell migration and function in the small intestine of mice. Gastroenterology 2009; 137:924-33. [PMID: 19450594 DOI: 10.1053/j.gastro.2009.05.039] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Revised: 04/25/2009] [Accepted: 05/13/2009] [Indexed: 12/02/2022]
Abstract
BACKGROUND & AIMS Immunoglobulin (Ig) A secretion into the intestinal lumen is an important immune mechanism of the gastrointestinal (GI) tract. B cells proliferate and differentiate into IgA-secreting plasma cells (PC) within lymphoid organs then migrate directly into the intestinal lamina propria. We aimed to elucidate the in vivo role of the mucosal addressin cell-adhesion molecule-1 (MAdCAM-1), which is constitutively expressed in the GI-associated lymphoid tissue, in B-cell migration. METHODS We generated MAdCAM-1-deficient mice (MAdCAM(Delta)) and evaluated the B-cell compartment of the GI-associated lymphoid tissue. We also assessed PC migration to the small intestine and the intestinal immune response after oral immunization. RESULTS In MAdCAM(Delta) mice, the size of Peyer's patches was drastically reduced, compared with that of wild-type mice; this difference was detectable by 3 days after birth, indicating that MAdCAM-1 is dispensable for embryonic Peyer's patch development but mediates recruitment of lymphocytes into this lymphoid organ at later stages. Moreover, antigen-specific, IgA-positive PC were severely compromised in their migration to the small intestine; accordingly, there was a reduced number of IgA-secreting PC in the lamina propria of the small intestine. The MAdCAM(Delta) mice were unable to mount a normal intestinal IgA response after oral immunization with cholera toxin. CONCLUSION These data provide in vivo evidence that MAdCAM-1 is required for the localization and function of IgA-secreting PC in the intestine.
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Affiliation(s)
- Angela Schippers
- Department of Pediatrics, Medical Faculty, RWTH Aachen University, Germany
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Wahl C, Müller W, Leithäuser F, Adler G, Oswald F, Reimann J, Schirmbeck R, Seier A, Weiss JM, Prochnow B, Wegenka UM. IL-20 receptor 2 signaling down-regulates antigen-specific T cell responses. THE JOURNAL OF IMMUNOLOGY 2009; 182:802-10. [PMID: 19124723 DOI: 10.4049/jimmunol.182.2.802] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The recently described cytokines IL-19, IL-20, and IL-24 share structural homology with IL-10 and are therefore classified as members of the IL-10 family of cytokines. Although it has long been speculated that signaling by their heterodimeric receptor complexes (IL-20R1/IL-20R2 and IL-22R/IL-20R2) influences immunological processes, the target cells for this group of cytokines are still unclear. By generating a knockout mouse strain deficient for the common IL-20R beta-chain (IL-20R2), we show that IFN-gamma and IL-2 secretion is significantly elevated after stimulation of IL-20R2-/--deficient CD8 and CD4 T cells with Con A or anti-CD3/CD28 in vitro. IL-10 secretion by activated IL-20R2-/- CD4 cells was diminished. Consistent with our in vitro results, significantly more Ag-specific CD8 IFN-gamma+ and CD4 IFN-gamma+ T cells developed to locally applied DNA vaccines in IL-20R2-deficient mice. In a T cell-dependent model of contact hypersensitivity, IL-20R2 knockout mice were more sensitive to the contact allergen trinitro-chloro-benzene. Thus, IL-20R2 signaling directly regulates CD8 and CD4 T cell answers in vitro and in vivo. For the first time, we provide evidence that IL-19, IL-20, and IL-24 are part of a signaling network that normally down-modulates T cell responses in mice.
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Affiliation(s)
- Christian Wahl
- University Medical Center, Center of Internal Medicine, Department of Internal Medicine I, Ulm, Germany
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