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Klatt AB, Diersing C, Lippmann J, Mayer-Lambertz S, Stegmann F, Fischer S, Caesar S, Fiocca Vernengo F, Hönzke K, Hocke AC, Ruland J, Witzenrath M, Lepenies B, Opitz B. CLEC12A Binds to Legionella pneumophila but Has No Impact on the Host's Antibacterial Response. Int J Mol Sci 2023; 24:ijms24043891. [PMID: 36835297 PMCID: PMC9967056 DOI: 10.3390/ijms24043891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Revised: 02/10/2023] [Accepted: 02/12/2023] [Indexed: 02/17/2023] Open
Abstract
Legionella pneumophila is an intracellular pathogen that can cause severe pneumonia after the inhalation of contaminated aerosols and replication in alveolar macrophages. Several pattern recognition receptors (PRRs) have been identified that contribute to the recognition of L. pneumophila by the innate immune system. However, the function of the C-type lectin receptors (CLRs), which are mainly expressed by macrophages and other myeloid cells, remains largely unexplored. Here, we used a library of CLR-Fc fusion proteins to search for CLRs that can bind the bacterium and identified the specific binding of CLEC12A to L. pneumophila. Subsequent infection experiments in human and murine macrophages, however, did not provide evidence for a substantial role of CLEC12A in controlling innate immune responses to the bacterium. Consistently, antibacterial and inflammatory responses to Legionella lung infection were not significantly influenced by CLEC12A deficiency. Collectively, CLEC12A is able to bind to L. pneumophila-derived ligands but does not appear to play a major role in the innate defense against L. pneumophila.
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Affiliation(s)
- Ann-Brit Klatt
- Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13353 Berlin, Germany
| | - Christina Diersing
- Institute for Immunology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
| | - Juliane Lippmann
- Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13353 Berlin, Germany
- Max Planck Institute for Infection Biology, Vector Biology, 10117 Berlin, Germany
| | - Sabine Mayer-Lambertz
- Institute for Immunology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
| | - Felix Stegmann
- Institute for Immunology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
| | - Swantje Fischer
- Institute for Immunology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
| | - Sandra Caesar
- Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13353 Berlin, Germany
| | - Facundo Fiocca Vernengo
- Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13353 Berlin, Germany
| | - Katja Hönzke
- Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13353 Berlin, Germany
- Faculty of Health Sciences Brandenburg, Brandenburg University of Technology Cottbus—Senftenberg, 03046 Cottbus, Germany
| | - Andreas C. Hocke
- Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13353 Berlin, Germany
- German Center for Lung Research (DZL), Augustenburger Platz 1, 13353 Berlin, Germany
| | - Jürgen Ruland
- Institute of Clinical Chemistry and Pathobiochemistry, School of Medicine, Technical University of Munich, 80333 Munich, Germany
- Center for Translational Cancer Research (TranslaTUM), 81675 Munich, Germany
- German Cancer Consortium (DKTK), Partner Site Munich, 80336 Munich, Germany
- German Research Center (DKFZ), 69120 Heidelberg, Germany
- German Center for Infection Research (DZIF), Partner Site Munich, 17493 Greifswald, Germany
| | - Martin Witzenrath
- Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13353 Berlin, Germany
- German Center for Lung Research (DZL), Augustenburger Platz 1, 13353 Berlin, Germany
| | - Bernd Lepenies
- Institute for Immunology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany
- Correspondence: (B.L.); (B.O.)
| | - Bastian Opitz
- Department of Infectious Diseases, Respiratory Medicine and Critical Care, Charité—Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, 13353 Berlin, Germany
- German Center for Lung Research (DZL), Augustenburger Platz 1, 13353 Berlin, Germany
- Correspondence: (B.L.); (B.O.)
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Pavasutthipaisit S, Stoff M, Ebbecke T, Ciurkiewicz M, Mayer-Lambertz S, Störk T, Pavelko KD, Lepenies B, Beineke A. CARD9 Deficiency Increases Hippocampal Injury Following Acute Neurotropic Picornavirus Infection but Does Not Affect Pathogen Elimination. Int J Mol Sci 2021; 22:ijms22136982. [PMID: 34209576 PMCID: PMC8268812 DOI: 10.3390/ijms22136982] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Revised: 06/20/2021] [Accepted: 06/25/2021] [Indexed: 12/11/2022] Open
Abstract
Neurotropic viruses target the brain and contribute to neurologic diseases. Caspase recruitment domain containing family member 9 (CARD9) controls protective immunity in a variety of infectious disorders. To investigate the effect of CARD9 in neurotropic virus infection, CARD9−/− and corresponding C57BL/6 wild-type control mice were infected with Theiler’s murine encephalomyelitis virus (TMEV). Brain tissue was analyzed by histology, immunohistochemistry and molecular analyses, and spleens by flow cytometry. To determine the impact of CARD9 deficiency on T cell responses in vitro, antigen presentation assays were utilized. Genetic ablation of CARD9 enhanced early pro-inflammatory cytokine responses and accelerated infiltration of T and B cells in the brain, together with a transient increase in TMEV-infected cells in the hippocampus. CARD9−/− mice showed an increased loss of neuronal nuclear protein+ mature neurons and doublecortin+ neuronal precursor cells and an increase in β-amyloid precursor protein+ damaged axons in the hippocampus. No effect of CARD9 deficiency was found on the initiation of CD8+ T cell responses by flow cytometry and co-culture experiments using virus-exposed dendritic cells or microglia-enriched glial cell mixtures, respectively. The present study indicates that CARD9 is dispensable for the initiation of early antiviral responses and TMEV elimination but may contribute to the modulation of neuroinflammation, thereby reducing hippocampal injury following neurotropic virus infection.
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Affiliation(s)
- Suvarin Pavasutthipaisit
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (S.P.); (M.S.); (M.C.); (T.S.)
- Center for Systems Neuroscience, 30559 Hannover, Germany; (T.E.); (B.L.)
- Department of Pathology, Faculty of Veterinary Medicine, Mahanakorn University of Technology, Bangkok 10530, Thailand
| | - Melanie Stoff
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (S.P.); (M.S.); (M.C.); (T.S.)
| | - Tim Ebbecke
- Center for Systems Neuroscience, 30559 Hannover, Germany; (T.E.); (B.L.)
- Institute for Immunology and Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany;
| | - Malgorzata Ciurkiewicz
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (S.P.); (M.S.); (M.C.); (T.S.)
| | - Sabine Mayer-Lambertz
- Institute for Immunology and Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany;
| | - Theresa Störk
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (S.P.); (M.S.); (M.C.); (T.S.)
| | - Kevin D. Pavelko
- Department of Immunology, Mayo Clinic, Rochester, MN 55905, USA;
| | - Bernd Lepenies
- Center for Systems Neuroscience, 30559 Hannover, Germany; (T.E.); (B.L.)
- Institute for Immunology and Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, 30559 Hannover, Germany;
| | - Andreas Beineke
- Department of Pathology, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (S.P.); (M.S.); (M.C.); (T.S.)
- Center for Systems Neuroscience, 30559 Hannover, Germany; (T.E.); (B.L.)
- Correspondence: ; Tel.: +49-51-195-38640
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Achilli S, Monteiro JT, Serna S, Mayer-Lambertz S, Thépaut M, Le Roy A, Ebel C, Reichardt NC, Lepenies B, Fieschi F, Vivès C. TETRALEC, Artificial Tetrameric Lectins: A Tool to Screen Ligand and Pathogen Interactions. Int J Mol Sci 2020; 21:E5290. [PMID: 32722514 PMCID: PMC7432041 DOI: 10.3390/ijms21155290] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 07/23/2020] [Accepted: 07/23/2020] [Indexed: 12/15/2022] Open
Abstract
C-type lectin receptor (CLR)/carbohydrate recognition occurs through low affinity interactions. Nature compensates that weakness by multivalent display of the lectin carbohydrate recognition domain (CRD) at the cell surface. Mimicking these low affinity interactions in vitro is essential to better understand CLR/glycan interactions. Here, we present a strategy to create a generic construct with a tetrameric presentation of the CRD for any CLR, termed TETRALEC. We applied our strategy to a naturally occurring tetrameric CRD, DC-SIGNR, and compared the TETRALEC ligand binding capacity by synthetic N- and O-glycans microarray using three different DC-SIGNR constructs i) its natural tetrameric counterpart, ii) the monomeric CRD and iii) a dimeric Fc-CRD fusion. DC-SIGNR TETRALEC construct showed a similar binding profile to that of its natural tetrameric counterpart. However, differences observed in recognition of low affinity ligands underlined the importance of the CRD spatial arrangement. Moreover, we further extended the applications of DC-SIGNR TETRALEC to evaluate CLR/pathogens interactions. This construct was able to recognize heat-killed Candida albicans by flow cytometry and confocal microscopy, a so far unreported specificity of DC-SIGNR. In summary, the newly developed DC-SIGNR TETRALEC tool proved to be useful to unravel novel CLR/glycan interactions, an approach which could be applied to other CLRs.
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Affiliation(s)
- Silvia Achilli
- Institut de Biologie Structurale, CEA, CNRS, University of Grenoble Alpes, F-38000 Grenoble, France; (S.A.); (M.T.); (A.L.R.); (C.E.); (F.F.)
| | - João T. Monteiro
- Immunology Unit & Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (J.T.M.); (S.M.-L.); (B.L.)
| | - Sonia Serna
- Glycotechnology Laboratory, Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), CIBER-BBN, Paseo Miramón 182, 20014 San Sebastian, Spain; (S.S.); (N.-C.R.)
| | - Sabine Mayer-Lambertz
- Immunology Unit & Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (J.T.M.); (S.M.-L.); (B.L.)
| | - Michel Thépaut
- Institut de Biologie Structurale, CEA, CNRS, University of Grenoble Alpes, F-38000 Grenoble, France; (S.A.); (M.T.); (A.L.R.); (C.E.); (F.F.)
| | - Aline Le Roy
- Institut de Biologie Structurale, CEA, CNRS, University of Grenoble Alpes, F-38000 Grenoble, France; (S.A.); (M.T.); (A.L.R.); (C.E.); (F.F.)
| | - Christine Ebel
- Institut de Biologie Structurale, CEA, CNRS, University of Grenoble Alpes, F-38000 Grenoble, France; (S.A.); (M.T.); (A.L.R.); (C.E.); (F.F.)
| | - Niels-Christian Reichardt
- Glycotechnology Laboratory, Center for Cooperative Research in Biomaterials (CIC biomaGUNE), Basque Research and Technology Alliance (BRTA), CIBER-BBN, Paseo Miramón 182, 20014 San Sebastian, Spain; (S.S.); (N.-C.R.)
| | - Bernd Lepenies
- Immunology Unit & Research Center for Emerging Infections and Zoonoses (RIZ), University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (J.T.M.); (S.M.-L.); (B.L.)
| | - Franck Fieschi
- Institut de Biologie Structurale, CEA, CNRS, University of Grenoble Alpes, F-38000 Grenoble, France; (S.A.); (M.T.); (A.L.R.); (C.E.); (F.F.)
| | - Corinne Vivès
- Institut de Biologie Structurale, CEA, CNRS, University of Grenoble Alpes, F-38000 Grenoble, France; (S.A.); (M.T.); (A.L.R.); (C.E.); (F.F.)
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