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Schauer AE, Klassert TE, von Lachner C, Riebold D, Schneeweiß A, Stock M, Müller MM, Hammerschmidt S, Bufler P, Seifert U, Dietert K, Dinarello CA, Nold MF, Gruber AD, Nold-Petry CA, Slevogt H. IL-37 Causes Excessive Inflammation and Tissue Damage in Murine Pneumococcal Pneumonia. J Innate Immun 2017; 9:403-418. [PMID: 28601872 PMCID: PMC6738772 DOI: 10.1159/000469661] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2016] [Revised: 03/09/2017] [Accepted: 03/09/2017] [Indexed: 12/20/2022] Open
Abstract
Streptococcus pneumoniae infections can lead to severe complications with excessive immune activation and tissue damage. Interleukin-37 (IL-37) has gained importance as a suppressor of innate and acquired immunity, and its effects have been therapeutic as they prevent tissue damage in autoimmune and inflammatory diseases. By using RAW macrophages, stably transfected with human IL-37, we showed a 70% decrease in the cytokine levels of IL-6, TNF-α, and IL-1β, and a 2.2-fold reduction of the intracellular killing capacity of internalized pneumococci in response to pneumococcal infection. In a murine model of infection with S. pneumoniae, using mice transgenic for human IL-37b (IL-37tg), we observed an initial decrease in cytokine expression of IL-6, TNF-α, and IL-1β in the lungs, followed by a late-phase enhancement of pneumococcal burden and subsequent increase of proinflammatory cytokine levels. Additionally, a marked increase in recruitment of alveolar macrophages and neutrophils was noted, while TRAIL mRNA was reduced 3-fold in lungs of IL-37tg mice, resulting in necrotizing pneumonia with augmented death of infiltrating neutrophils, enhanced bacteremic spread, and increased mortality. In conclusion, we have identified that IL-37 modulates several core components of a successful inflammatory response to pneumococcal pneumonia, which lead to increased inflammation, tissue damage, and mortality.
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Affiliation(s)
- Anja E. Schauer
- Septomics Research Center, Jena University Hospital, Jena, Germany
| | | | | | - Diana Riebold
- InfectoGnostics Research Campus Jena, Centre for Applied Research Jena, Jena, Germany
| | - Anne Schneeweiß
- Septomics Research Center, Jena University Hospital, Jena, Germany
| | - Magdalena Stock
- Septomics Research Center, Jena University Hospital, Jena, Germany
| | - Mario M. Müller
- Septomics Research Center, Jena University Hospital, Jena, Germany
| | - Sven Hammerschmidt
- Department of Genetics of Microorganisms, Interfaculty Institute for Genetics and Functional Genomics, Ernst Moritz Arndt University of Greifswald, Greifswald, Germany
| | - Philip Bufler
- Department of Pediatrics, Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University, Munich, Germany
| | - Ulrike Seifert
- Friedrich Loeffler Institute of Medical Microbiology, University Medicine Greifswald, Greifswald, Germany
| | - Kristina Dietert
- Institute of Veterinary Pathology, Freie Universität Berlin, Berlin, Germany
| | - Charles A. Dinarello
- Department of Medicine, University of Colorado Denver, Aurora, CO, USA
- Department of Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Marcel F. Nold
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| | - Achim D. Gruber
- Institute of Veterinary Pathology, Freie Universität Berlin, Berlin, Germany
| | - Claudia A. Nold-Petry
- The Ritchie Centre, Hudson Institute of Medical Research, Melbourne, VIC, Australia
- Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| | - Hortense Slevogt
- Septomics Research Center, Jena University Hospital, Jena, Germany
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Gutbier B, Fischer K, Doehn JM, von Lachner C, Herr C, Klaile E, Frischmann U, Singer BB, Riesbeck K, Zimmermann W, Suttorp N, Bachmann S, Bals R, Witzenrath M, Slevogt H. Moraxella catarrhalis induces an immune response in the murine lung that is independent of human CEACAM5 expression and long-term smoke exposure. Am J Physiol Lung Cell Mol Physiol 2015; 309:L250-61. [PMID: 26047639 DOI: 10.1152/ajplung.00265.2014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 05/29/2015] [Indexed: 01/09/2023] Open
Abstract
In patients with chronic obstructive pulmonary disease (COPD), Moraxella catarrhalis infection of the lower airways is associated with chronic colonization and inflammation during stable disease and acute exacerbations. Chronic smoke exposure induces chronic inflammation and impairs mucociliary clearance, thus contributing to bacterial colonization of the lower airways in COPD patients. The human-specific carcinoembryonic antigen-related cell adhesion molecule (CEACAM) 5, expressed in human airways, has been shown to contribute to epithelial colonization of CEACAM-binding pathogens. To investigate the impact of CEACAM5 expression on pulmonary M. catarrhalis colonization, we infected mice transgenic for human CEACAM5 (hCEACAM5) and wild type mice intratracheally with M. catarrhalis with or without preceding smoke exposure and analyzed bacterial colonization and local and systemic inflammation. Our results show that airway infection with M. catarrhalis accelerated acute local but not systemic inflammation, albeit independent of hCEACAM5 expression. Long-term smoke exposure alone or prior to M. catarrhalis infection did not contribute to increased local or systemic inflammation. No difference was found in pulmonary clearance of M. catarrhalis in hCEACAM5-transgenic mice compared with wild-type mice. Smoke exposure neither altered time nor extent of persistence of M. catarrhalis in the lungs of both genotypes. In conclusion, M. catarrhalis induced a local acute immune response in murine airways. Neither hCEACAM5 expression nor chronic smoke exposure nor a combination of both was sufficient as prerequisites for the establishment of chronic M. catarrhalis colonization. Our results demonstrate the difficulties in mirroring conditions of chronic airways colonization of M. catarrhalis in a murine model.
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Affiliation(s)
- Birgitt Gutbier
- Department of Infectious Diseases and Pulmonary Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Katja Fischer
- Department of Infectious Diseases and Pulmonary Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany; Septomics Research Center, Jena University Hospital, Jena, Germany
| | - Jan-Moritz Doehn
- Department of Infectious Diseases and Pulmonary Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | | | - Christian Herr
- Department of Internal Medicine V-Pulmonology, Allergology, Respiratory Intensive Care Medicine, University of the Saarland, Homburg Saar, Germany
| | - Esther Klaile
- Septomics Research Center, Jena University Hospital, Jena, Germany; Center for Sepsis Control and Care (CSCC), Jena University Hospital, Jena, Germany
| | | | - Bernhard B Singer
- Institute of Anatomy, Medical Faculty, University Duisburg-Essen, Essen, Germany
| | - Kristian Riesbeck
- Clinical Microbiology, Department of Translational Medicine Malmö, Lund University, Malmö, Sweden
| | - Wolfgang Zimmermann
- Tumor Immunology Laboratory, LIFE-Center, Klinikum Grosshadern, Ludwig-Maximilians-University Munich, Munich, Germany; and
| | - Norbert Suttorp
- Department of Infectious Diseases and Pulmonary Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Sebastian Bachmann
- Department of Anatomy, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Robert Bals
- Department of Internal Medicine V-Pulmonology, Allergology, Respiratory Intensive Care Medicine, University of the Saarland, Homburg Saar, Germany
| | - Martin Witzenrath
- Department of Infectious Diseases and Pulmonary Medicine, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Hortense Slevogt
- Septomics Research Center, Jena University Hospital, Jena, Germany;
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