1
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Onder L, Cheng HW, Ludewig B. Visualization and functional characterization of lymphoid organ fibroblasts. Immunol Rev 2021; 306:108-122. [PMID: 34866192 PMCID: PMC9300201 DOI: 10.1111/imr.13051] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 11/21/2021] [Accepted: 11/23/2021] [Indexed: 11/29/2022]
Abstract
Fibroblastic reticular cells (FRCs) are specialized stromal cells of lymphoid organs that generate the structural foundation of the tissue and actively interact with immune cells. Distinct FRC subsets position lymphocytes and myeloid cells in specialized niches where they present processed or native antigen and provide essential growth factors and cytokines for immune cell activation and differentiation. Niche‐specific functions of FRC subpopulations have been defined using genetic targeting, high‐dimensional transcriptomic analyses, and advanced imaging methods. Here, we review recent findings on FRC‐immune cell interaction and the elaboration of FRC development and differentiation. We discuss how imaging approaches have not only shaped our understanding of FRC biology, but have critically advanced the niche concept of immune cell maintenance and control of immune reactivity.
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Affiliation(s)
- Lucas Onder
- Institute of Immunobiology, Medical Research Center, Kantonsspital St.Gallen, St.Gallen, Switzerland
| | - Hung-Wei Cheng
- Institute of Immunobiology, Medical Research Center, Kantonsspital St.Gallen, St.Gallen, Switzerland
| | - Burkhard Ludewig
- Institute of Immunobiology, Medical Research Center, Kantonsspital St.Gallen, St.Gallen, Switzerland
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2
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Bellomo A, Gentek R, Golub R, Bajénoff M. Macrophage-fibroblast circuits in the spleen. Immunol Rev 2021; 302:104-125. [PMID: 34028841 DOI: 10.1111/imr.12979] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 04/30/2021] [Accepted: 04/30/2021] [Indexed: 12/22/2022]
Abstract
Macrophages are an integral part of all organs in the body, where they contribute to immune surveillance, protection, and tissue-specific homeostatic functions. This is facilitated by so-called niches composed of macrophages and their surrounding stroma. These niches structurally anchor macrophages and provide them with survival factors and tissue-specific signals that imprint their functional identity. In turn, macrophages ensure appropriate functioning of the niches they reside in. Macrophages thus form reciprocal, mutually beneficial circuits with their cellular niches. In this review, we explore how this concept applies to the spleen, a large secondary lymphoid organ whose primary functions are to filter the blood and regulate immunity. We first outline the splenic micro-anatomy, the different populations of splenic fibroblasts and macrophages and their respective contribution to protection of and key physiological processes occurring in the spleen. We then discuss firmly established and potential cellular circuits formed by splenic macrophages and fibroblasts, with an emphasis on the molecular cues underlying their crosstalk and their relevance to splenic functionality. Lastly, we conclude by considering how these macrophage-fibroblast circuits might be impaired by aging, and how understanding these changes might help identify novel therapeutic avenues with the potential of restoring splenic functions in the elderly.
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Affiliation(s)
- Alicia Bellomo
- CIRI, Inserm, U1111, Université Claude Bernard Lyon 1, CNRS, UMR5308, École Normale Supérieure de Lyon, Univ Lyon, Lyon, France
| | - Rebecca Gentek
- Centre for Inflammation Research & Centre for Reproductive Health, The Queen's Medical Research Institute, University of Edinburgh, Edinburgh, UK
| | - Rachel Golub
- Inserm U1223, Institut Pasteur, Paris, France.,Lymphopoiesis Unit, Institut Pasteur, Paris, France
| | - Marc Bajénoff
- Aix Marseille Univ, CNRS, INSERM, CIML, Marseille, France
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3
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Guendel F, Kofoed-Branzk M, Gronke K, Tizian C, Witkowski M, Cheng HW, Heinz GA, Heinrich F, Durek P, Norris PS, Ware CF, Ruedl C, Herold S, Pfeffer K, Hehlgans T, Waisman A, Becher B, Giannou AD, Brachs S, Ebert K, Tanriver Y, Ludewig B, Mashreghi MF, Kruglov AA, Diefenbach A. Group 3 Innate Lymphoid Cells Program a Distinct Subset of IL-22BP-Producing Dendritic Cells Demarcating Solitary Intestinal Lymphoid Tissues. Immunity 2021; 53:1015-1032.e8. [PMID: 33207209 DOI: 10.1016/j.immuni.2020.10.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2019] [Revised: 07/20/2020] [Accepted: 10/16/2020] [Indexed: 12/23/2022]
Abstract
Solitary intestinal lymphoid tissues such as cryptopatches (CPs) and isolated lymphoid follicles (ILFs) constitute steady-state activation hubs containing group 3 innate lymphoid cells (ILC3) that continuously produce interleukin (IL)-22. The outer surface of CPs and ILFs is demarcated by a poorly characterized population of CD11c+ cells. Using genome-wide single-cell transcriptional profiling of intestinal mononuclear phagocytes and multidimensional flow cytometry, we found that CP- and ILF-associated CD11c+ cells were a transcriptionally distinct subset of intestinal cDCs, which we term CIA-DCs. CIA-DCs required programming by CP- and ILF-resident CCR6+ ILC3 via lymphotoxin-β receptor signaling in cDCs. CIA-DCs differentially expressed genes associated with immunoregulation and were the major cellular source of IL-22 binding protein (IL-22BP) at steady state. Mice lacking CIA-DC-derived IL-22BP exhibited diminished expression of epithelial lipid transporters, reduced lipid resorption, and changes in body fat homeostasis. Our findings provide insight into the design principles of an immunoregulatory checkpoint controlling nutrient absorption.
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Affiliation(s)
- Fabian Guendel
- Laboratory of Innate Immunity, Department of Microbiology, Infectious Diseases and Immunology, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203 Berlin, Germany; Berlin Institute of Health (BIH), Anna-Louisa-Karsch Strasse 2, 10117 Berlin, Germany; Mucosal and Developmental Immunology, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany
| | - Michael Kofoed-Branzk
- Laboratory of Innate Immunity, Department of Microbiology, Infectious Diseases and Immunology, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203 Berlin, Germany; Berlin Institute of Health (BIH), Anna-Louisa-Karsch Strasse 2, 10117 Berlin, Germany; Mucosal and Developmental Immunology, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany
| | - Konrad Gronke
- Laboratory of Innate Immunity, Department of Microbiology, Infectious Diseases and Immunology, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203 Berlin, Germany; Berlin Institute of Health (BIH), Anna-Louisa-Karsch Strasse 2, 10117 Berlin, Germany; Mucosal and Developmental Immunology, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany
| | - Caroline Tizian
- Laboratory of Innate Immunity, Department of Microbiology, Infectious Diseases and Immunology, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203 Berlin, Germany; Berlin Institute of Health (BIH), Anna-Louisa-Karsch Strasse 2, 10117 Berlin, Germany; Mucosal and Developmental Immunology, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany
| | - Mario Witkowski
- Laboratory of Innate Immunity, Department of Microbiology, Infectious Diseases and Immunology, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203 Berlin, Germany; Berlin Institute of Health (BIH), Anna-Louisa-Karsch Strasse 2, 10117 Berlin, Germany; Mucosal and Developmental Immunology, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany
| | - Hung-Wei Cheng
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Gitta Anne Heinz
- Therapeutic Gene Regulation, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany
| | - Frederik Heinrich
- Therapeutic Gene Regulation, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany
| | - Pawel Durek
- Therapeutic Gene Regulation, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany
| | - Paula S Norris
- Laboratory of Molecular Immunology, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Carl F Ware
- Laboratory of Molecular Immunology, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA 92037, USA
| | - Christiane Ruedl
- School of Biological Sciences, Nanyang Technological University Singapore, Singapore
| | - Susanne Herold
- Department of Internal Medicine II, Universities of Giessen and Marburg Lung Center, member of the German Center for Lung Research (DZL), Giessen, Germany
| | - Klaus Pfeffer
- Institute of Medical Microbiology and Hospital Hygiene, Heinrich Heine University Düsseldorf, Düsseldorf, Germany
| | - Thomas Hehlgans
- Regensburg Center for Interventional Immunology (RCI), Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany; Chair for Immunology, Regensburg University, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany
| | - Ari Waisman
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
| | - Burkhard Becher
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Anastasios D Giannou
- Section of Molecular Immunology und Gastroenterology, I. Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany; Department of General, Visceral and Thoracic Surgery, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Sebastian Brachs
- Department of Endocrinology and Metabolism, Charité-Universitätsmedizin Berlin, Charitéplatz 1, 10117 Berlin, Germany; DZHK (German Centre for Cardiovascular Research), partner site Berlin, Germany; Center for Cardiovascular Research (CCR), Charité-Universitätsmedizin Berlin, Hessische Strasse 3-4, 10115 Berlin, Germany
| | - Karolina Ebert
- Institute of Medical Microbiology and Hygiene, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Yakup Tanriver
- Institute of Medical Microbiology and Hygiene, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Department of Internal Medicine IV, Medical Center-University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Burkhard Ludewig
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland; Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Mir-Farzin Mashreghi
- Therapeutic Gene Regulation, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany; BIH Center for Regenerative Therapies (BCRT), Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Andrey A Kruglov
- Microbiota and Chronic Inflammation, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany; Belozersky Institute of Physico-Chemical Biology and Biological Faculty, M.V. Lomonosov Moscow State University, Moscow 119234, Russia; Center for Precision Genome Editing and Genetic Technologies for Biomedicine, Engelhardt Institute of Molecular Biology, Russian Academy of Sciences, Moscow 119991, Russia
| | - Andreas Diefenbach
- Laboratory of Innate Immunity, Department of Microbiology, Infectious Diseases and Immunology, Charité-Universitätsmedizin Berlin, Campus Benjamin Franklin, Hindenburgdamm 30, 12203 Berlin, Germany; Berlin Institute of Health (BIH), Anna-Louisa-Karsch Strasse 2, 10117 Berlin, Germany; Mucosal and Developmental Immunology, Deutsches Rheuma-Forschungszentrum (DRFZ), an institute of the Leibniz Association, 10117 Berlin, Germany.
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4
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Solmaz G, Puttur F, Francozo M, Lindenberg M, Guderian M, Swallow M, Duhan V, Khairnar V, Kalinke U, Ludewig B, Clausen BE, Wagner H, Lang KS, Sparwasser TD. TLR7 Controls VSV Replication in CD169 + SCS Macrophages and Associated Viral Neuroinvasion. Front Immunol 2019; 10:466. [PMID: 30930901 PMCID: PMC6428728 DOI: 10.3389/fimmu.2019.00466] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 02/21/2019] [Indexed: 01/21/2023] Open
Abstract
Vesicular stomatitis virus (VSV) is an insect-transmitted rhabdovirus that is neurovirulent in mice. Upon peripheral VSV infection, CD169+ subcapsular sinus (SCS) macrophages capture VSV in the lymph, support viral replication, and prevent CNS neuroinvasion. To date, the precise mechanisms controlling VSV infection in SCS macrophages remain incompletely understood. Here, we show that Toll-like receptor-7 (TLR7), the main sensing receptor for VSV, is central in controlling lymph-borne VSV infection. Following VSV skin infection, TLR7−/− mice display significantly less VSV titers in the draining lymph nodes (dLN) and viral replication is attenuated in SCS macrophages. In contrast to effects of TLR7 in impeding VSV replication in the dLN, TLR7−/− mice present elevated viral load in the brain and spinal cord highlighting their susceptibility to VSV neuroinvasion. By generating novel TLR7 floxed mice, we interrogate the impact of cell-specific TLR7 function in anti-viral immunity after VSV skin infection. Our data suggests that TLR7 signaling in SCS macrophages supports VSV replication in these cells, increasing LN infection and may account for the delayed onset of VSV-induced neurovirulence observed in TLR7−/− mice. Overall, we identify TLR7 as a novel and essential host factor that critically controls anti-viral immunity to VSV. Furthermore, the novel mouse model generated in our study will be of valuable importance to shed light on cell-intrinsic TLR7 biology in future studies.
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Affiliation(s)
- Gülhas Solmaz
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, A Joint Venture Between the Medical School Hannover and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Franz Puttur
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, A Joint Venture Between the Medical School Hannover and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Marcela Francozo
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, A Joint Venture Between the Medical School Hannover and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Marc Lindenberg
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, A Joint Venture Between the Medical School Hannover and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Melanie Guderian
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, A Joint Venture Between the Medical School Hannover and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Maxine Swallow
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, A Joint Venture Between the Medical School Hannover and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Vikas Duhan
- Institute of Immunology of the University Hospital in Essen, Medical Faculty, University of Duisburg-Essen, Essen, Germany
| | - Vishal Khairnar
- Institute of Immunology of the University Hospital in Essen, Medical Faculty, University of Duisburg-Essen, Essen, Germany
| | - Ulrich Kalinke
- Institute of Experimental Infection Research, TWINCORE, Centre for Experimental and Clinical Infection Research, A Joint Venture Between the Hannover Medical School and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Burkhard Ludewig
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Björn E Clausen
- Institute for Molecular Medicine, University Medical Center of the Johannes Gutenberg-University Mainz, Mainz, Germany
| | - Hermann Wagner
- Institute for Medical Microbiology, Immunology and Hygiene, Technical University Munich, Munich, Germany
| | - Karl S Lang
- Institute of Immunology of the University Hospital in Essen, Medical Faculty, University of Duisburg-Essen, Essen, Germany
| | - Tim D Sparwasser
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, A Joint Venture Between the Medical School Hannover and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany.,Department of Medical Microbiology and Hygiene, University Medical Center of the Johannes Gutenberg University Mainz, Mainz, Germany
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5
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Ward LSC, Sheriff L, Marshall JL, Manning JE, Brill A, Nash GB, McGettrick HM. Podoplanin regulates the migration of mesenchymal stromal cells and their interaction with platelets. J Cell Sci 2019; 132:jcs.222067. [PMID: 30745334 PMCID: PMC6432720 DOI: 10.1242/jcs.222067] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 01/24/2019] [Indexed: 12/18/2022] Open
Abstract
Mesenchymal stromal cells (MSCs) upregulate podoplanin at sites of infection, chronic inflammation and cancer. Here, we investigated the functional consequences of podoplanin expression on the migratory potential of MSCs and their interactions with circulating platelets. Expression of podoplanin significantly enhanced the migration of MSCs compared to MSCs lacking podoplanin. Rac-1 inhibition altered the membrane localisation of podoplanin and in turn significantly reduced MSC migration. Blocking Rac-1 activity had no effect on the migration of MSCs lacking podoplanin, indicating that it was responsible for regulation of migration through podoplanin. When podoplanin-expressing MSCs were seeded on the basal surface of a porous filter, they were able to capture platelets perfused over the uncoated apical surface and induce platelet aggregation. Similar microthrombi were observed when endothelial cells (ECs) were co-cultured on the apical surface. Confocal imaging shows podoplanin-expressing MSCs extending processes into the EC layer, and these processes could interact with circulating platelets. In both models, platelet aggregation induced by podoplanin-expressing MSCs was inhibited by treatment with recombinant soluble C-type lectin-like receptor 2 (CLEC-2; encoded by the gene Clec1b). Thus, podoplanin may enhance the migratory capacity of tissue-resident MSCs and enable novel interactions with cells expressing CLEC-2. Summary: Podoplanin enhances the migration of mesenchymal stromal cells in a Rac-1-dependent manner, enabling direct interactions of subendothelial stroma with circulating platelets.
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Affiliation(s)
- Lewis S C Ward
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham B15 2TT, UK
| | - Lozan Sheriff
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Jennifer L Marshall
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham B15 2TT, UK
| | - Julia E Manning
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham B15 2TT, UK
| | - Alexander Brill
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK.,Centre of Membrane and Protein and Receptors (COMPARE), Institute for Biomedical Research, The Medical School, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.,Department of Pathophysiology, Sechenov First Moscow State Medical University, Moscow 119048, Russia
| | - Gerard B Nash
- Institute of Cardiovascular Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham B15 2TT, UK
| | - Helen M McGettrick
- Institute of Inflammation and Ageing, University of Birmingham, Birmingham B15 2TT, UK
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6
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Knop L, Frommer C, Stoycheva D, Deiser K, Kalinke U, Blankenstein T, Kammertoens T, Dunay IR, Schüler T. Interferon-γ Receptor Signaling in Dendritic Cells Restrains Spontaneous Proliferation of CD4 + T Cells in Chronic Lymphopenic Mice. Front Immunol 2019; 10:140. [PMID: 30792713 PMCID: PMC6374634 DOI: 10.3389/fimmu.2019.00140] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 01/17/2019] [Indexed: 01/30/2023] Open
Abstract
In lymphopenic mice, T cells become activated and undergo lymphopenia-induced proliferation (LIP). However, not all T cells are equally sensitive to lymphopenia. Several lymphopenia-insensitive T cell clones were described and their non-responsiveness was mainly attributed to clone-specific properties. Here, we provide evidence for an additional, host-dependent mechanism restraining LIP of lymphopenia-insensitive CD4+ T cells. We show that such cells undergo LIP in lymphopenic mice lacking IFN-γ receptor (IFN-γR) expression, a process, which is promoted by the autocrine action of T cell-derived IFN-γ. Additionally, LIP of lymphopenia-insensitive CD4+ T cells requires an intact microflora and is accompanied by the massive accumulation of IL-6 and dendritic cells (DCs). Consistent with these results, IL-6 neutralization and the DC-specific restoration of IFN-γR expression are both sufficient to restrict LIP. Hence, the insensitivity of CD4+ T cells to lymphopenia relies on cell-intrinsic properties and a complex interplay between the commensal microflora, IL-6, IFN-γR+ DCs, and T cell-derived IFN-γ.
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Affiliation(s)
- Laura Knop
- Institute of Molecular and Clinical Immunology, Medical Faculty, Otto-von-Guericke University, Magdeburg, Germany
| | - Charlotte Frommer
- Institute of Molecular and Clinical Immunology, Medical Faculty, Otto-von-Guericke University, Magdeburg, Germany
| | - Diana Stoycheva
- Institute of Molecular and Clinical Immunology, Medical Faculty, Otto-von-Guericke University, Magdeburg, Germany
| | - Katrin Deiser
- Institute of Molecular and Clinical Immunology, Medical Faculty, Otto-von-Guericke University, Magdeburg, Germany
| | - Ulrich Kalinke
- TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Helmholtz Centre for Infection Research and the Medical School Hannover, Institute for Experimental Infection Research, Hannover, Germany
| | - Thomas Blankenstein
- Institute of Immunology, Charité-Universitätsmedizin Berlin, Berlin, Germany
- Max-Delbrück-Center for Molecular Medicine, Berlin, Germany
- Berlin Institute of Health, Berlin, Germany
| | - Thomas Kammertoens
- Institute of Immunology, Charité-Universitätsmedizin Berlin, Berlin, Germany
| | - Ildiko Rita Dunay
- Institute of Inflammation and Neurodegeneration, Medical Faculty, Otto-von-Guericke University, Magdeburg, Germany
| | - Thomas Schüler
- Institute of Molecular and Clinical Immunology, Medical Faculty, Otto-von-Guericke University, Magdeburg, Germany
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7
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Breslin JW, Yang Y, Scallan JP, Sweat RS, Adderley SP, Murfee WL. Lymphatic Vessel Network Structure and Physiology. Compr Physiol 2018; 9:207-299. [PMID: 30549020 PMCID: PMC6459625 DOI: 10.1002/cphy.c180015] [Citation(s) in RCA: 174] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The lymphatic system is comprised of a network of vessels interrelated with lymphoid tissue, which has the holistic function to maintain the local physiologic environment for every cell in all tissues of the body. The lymphatic system maintains extracellular fluid homeostasis favorable for optimal tissue function, removing substances that arise due to metabolism or cell death, and optimizing immunity against bacteria, viruses, parasites, and other antigens. This article provides a comprehensive review of important findings over the past century along with recent advances in the understanding of the anatomy and physiology of lymphatic vessels, including tissue/organ specificity, development, mechanisms of lymph formation and transport, lymphangiogenesis, and the roles of lymphatics in disease. © 2019 American Physiological Society. Compr Physiol 9:207-299, 2019.
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Affiliation(s)
- Jerome W. Breslin
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL
| | - Ying Yang
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL
| | - Joshua P. Scallan
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL
| | - Richard S. Sweat
- Department of Biomedical Engineering, Tulane University, New Orleans, LA
| | - Shaquria P. Adderley
- Department of Molecular Pharmacology and Physiology, Morsani College of Medicine, University of South Florida, Tampa, FL
| | - W. Lee Murfee
- Department of Biomedical Engineering, University of Florida, Gainesville, FL
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8
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Doh SJ, Yamakawa M, Santosa SM, Montana M, Guo K, Sauer JR, Curran N, Han KY, Yu C, Ema M, Rosenblatt MI, Chang JH, Azar DT. Fluorescent reporter transgenic mice for in vivo live imaging of angiogenesis and lymphangiogenesis. Angiogenesis 2018; 21:677-698. [PMID: 29971641 DOI: 10.1007/s10456-018-9629-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 06/26/2018] [Indexed: 12/29/2022]
Abstract
The study of lymphangiogenesis is an emerging science that has revealed the lymphatic system as a central player in many pathological conditions including cancer metastasis, lymphedema, and organ graft rejection. A thorough understanding of the mechanisms of lymphatic growth will play a key role in the development of therapeutic strategies against these conditions. Despite the known potential of this field, the study of lymphatics has historically lagged behind that of hemangiogenesis. Until recently, significant strides in lymphatic studies were impeded by a lack of lymphatic-specific markers and suitable experimental models compared to those of the more immediately visible blood vasculature. Lymphangiogenesis has also been shown to be a key phenomenon in developmental biological processes, such as cell proliferation, guided migration, differentiation, and cell-to-cell communication, making lymphatic-specific visualization techniques highly desirable and desperately needed. Imaging modalities including immunohistochemistry and in situ hybridization are limited by the need to sacrifice animal models for tissue harvesting at every experimental time point. Moreover, the processes of mounting and staining harvested tissues may introduce artifacts that can confound results. These traditional methods for investigating lymphatic and blood vasculature are associated with several problems including animal variability (e.g., between mice) when replicating lymphatic growth environments and the cost concerns of prolonged, labor-intensive studies, all of which complicate the study of dynamic lymphatic processes. With the discovery of lymphatic-specific markers, researchers have been able to develop several lymphatic and blood vessel-specific, promoter-driven, fluorescent-reporter transgenic mice for visualization of lymphatics in vivo and in vitro. For instance, GFP, mOrange, tdTomato, and other fluorescent proteins can be expressed under control of a lymphatic-specific marker like Prospero-related homeobox 1 (Prox1), which is a highly conserved transcription factor for determining embryonic organogenesis in vertebrates that is implicated in lymphangiogenesis as well as several human cancers. Importantly, Prox1-null mouse embryos develop without lymphatic vessels. In human adults, Prox1 maintains lymphatic endothelial cells and upregulates proteins associated with lymphangiogenesis (e.g., VEGFR-3) and downregulates angiogenesis-associated gene expression (e.g., STAT6). To visualize lymphatic development in the context of angiogenesis, dual fluorescent-transgenic reporters, like Prox1-GFP/Flt1-DsRed mice, have been bred to characterize lymphatic and blood vessels simultaneously in vivo. In this review, we discuss the trends in lymphatic visualization and the potential usage of transgenic breeds in hemangiogenesis and lymphangiogenesis research to understand spatial and temporal correlations between vascular development and pathological progression.
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Affiliation(s)
- Susan J Doh
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Michael Yamakawa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Samuel M Santosa
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Mario Montana
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Kai Guo
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Joseph R Sauer
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Nicholas Curran
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Kyu-Yeon Han
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Charles Yu
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Masatsugu Ema
- Department of Stem Cells and Human Disease Models, Shiga University of Medical Science, Otsu, Japan
| | - Mark I Rosenblatt
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA
| | - Jin-Hong Chang
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA.
| | - Dimitri T Azar
- Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, IL, USA.
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9
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Rodda LB, Lu E, Bennett ML, Sokol CL, Wang X, Luther SA, Barres BA, Luster AD, Ye CJ, Cyster JG. Single-Cell RNA Sequencing of Lymph Node Stromal Cells Reveals Niche-Associated Heterogeneity. Immunity 2018; 48:1014-1028.e6. [PMID: 29752062 DOI: 10.1016/j.immuni.2018.04.006] [Citation(s) in RCA: 277] [Impact Index Per Article: 46.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 11/23/2017] [Accepted: 04/02/2018] [Indexed: 01/06/2023]
Abstract
Stromal cells (SCs) establish the compartmentalization of lymphoid tissues critical to the immune response. However, the full diversity of lymph node (LN) SCs remains undefined. Using droplet-based single-cell RNA sequencing, we identified nine peripheral LN non-endothelial SC clusters. Included are the established subsets, Ccl19hi T-zone reticular cells (TRCs), marginal reticular cells, follicular dendritic cells (FDCs), and perivascular cells. We also identified Ccl19lo TRCs, likely including cholesterol-25-hydroxylase+ cells located at the T-zone perimeter, Cxcl9+ TRCs in the T-zone and interfollicular region, CD34+ SCs in the capsule and medullary vessel adventitia, indolethylamine N-methyltransferase+ SCs in the medullary cords, and Nr4a1+ SCs in several niches. These data help define how transcriptionally distinct LN SCs support niche-restricted immune functions and provide evidence that many SCs are in an activated state.
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Affiliation(s)
- Lauren B Rodda
- Howard Hughes Medical Institute and Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Erick Lu
- Howard Hughes Medical Institute and Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Mariko L Bennett
- Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Caroline L Sokol
- Center for Immunology & Inflammatory Diseases, Division of Rheumatology, Allergy & Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Xiaoming Wang
- Department of Immunology, Nanjing Medical University, Nanjing, China
| | - Sanjiv A Luther
- Department of Biochemistry, Center for Immunity and Infection, University of Lausanne, 1066 Epalinges, Switzerland
| | - Ben A Barres
- Department of Neurobiology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Andrew D Luster
- Center for Immunology & Inflammatory Diseases, Division of Rheumatology, Allergy & Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Chun Jimmie Ye
- Institute for Human Genetics, Department of Epidemiology and Biostatistics, Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA 94143, USA
| | - Jason G Cyster
- Howard Hughes Medical Institute and Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA 94143, USA.
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10
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Gil HJ, Ma W, Oliver G. A novel podoplanin-GFPCre mouse strain for gene deletion in lymphatic endothelial cells. Genesis 2018; 56:e23102. [PMID: 29569811 DOI: 10.1002/dvg.23102] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 03/12/2018] [Accepted: 03/13/2018] [Indexed: 12/12/2022]
Abstract
The lymphatic vascular system is a one-direction network of thin-walled capillaries and larger vessels covered by a continuous layer of endothelial cells responsible for maintaining fluid homeostasis. Some of the main functions of the lymphatic vasculature are to drain fluid from the extracellular spaces and return it back to the blood circulation, lipid absorption from the intestinal tract, and transport of immune cells to lymphoid organs. A number of genes controlling the development of the mammalian lymphatic vasculature have been identified in the last few years, and their functional roles started to be characterized using gene inactivation approaches in mice. Unfortunately, only few mouse Cre strains relatively specific for lymphatic endothelial cells (LECs) are currently available. In this article, we report the generation of a novel Podoplanin (Pdpn) GFPCre transgenic mouse strain using its 5' regulatory region. Pdpn encodes a transmembrane mucin-type O-glycoprotein that is expressed on the surface of embryonic and postnatal LECs, in addition to few other cell types. Our detailed characterization of this novel strain indicates that it will be a valuable additional genetic tool for the analysis of gene function in LECs.
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Affiliation(s)
- Hyea Jin Gil
- Center for Vascular and Developmental Biology, Feinberg Cardiovascular Research Institute, Northwestern University Feinberg School of Medicine, Chicago, Illinois, 60611
| | - Wanshu Ma
- Center for Vascular and Developmental Biology, Feinberg Cardiovascular Research Institute, Northwestern University Feinberg School of Medicine, Chicago, Illinois, 60611
| | - Guillermo Oliver
- Center for Vascular and Developmental Biology, Feinberg Cardiovascular Research Institute, Northwestern University Feinberg School of Medicine, Chicago, Illinois, 60611
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11
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Abstract
Lineage tracing allows for identification of all progeny produced by a single cell or groups of cells and can thus be used to assess developmental fate of cells. Here we focus on one of the most widely used lineage tracing approaches that utilize the Cre/loxP system for site-specific genetic recombination in studying the developmental origins of lymphatic endothelial cells (LECs) in the mouse embryo. We discuss general considerations for a successful Cre/loxP based lineage tracing experiment and provide information about strains that are available for genetic lineage tracing of LECs. A protocol for lineage tracing analysis of the lymphatic vasculature by whole-mount immunofluorescence in two embryonic tissues, the skin and the mesentery, is also provided.
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12
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Raeesi V, Ehsani A, Torshizi RV, Sargolzaei M, Masoudi AA, Dideban R. Genome-wide association study of cell-mediated immune response in chicken. J Anim Breed Genet 2017; 134:405-411. [PMID: 28295717 DOI: 10.1111/jbg.12265] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 02/02/2017] [Indexed: 02/03/2023]
Abstract
Cell-mediated immunity (CMI) causes the intracellular destruction of the antigen or elimination of the host cell to make animals resistant against exogenous antigens and cancers. In this study, a genome-wide association study (GWAS) was carried out to identify genomic regions associated with CMI in chicken using chicken 60k high-density single nucleotide polymorphism (SNP) array. Genomic relationships were taken into account to adjust for population structure. In order to account for multiple testing, chromosome-wise false discovery rate was controlled at 5% and 10% levels. Moreover, a comparison of the power of fixed and mixed linear models based on genomic inflation factor was carried out. Mixed linear model (MLM) had better inflation rate, and therefore the results from MLM were used for subsequent analysis. Three significantly associated SNPs (FDR < 0.05) on chromosome 24 and linkage group E22C19W28_E50C23, and three suggestively associated SNPs (FDR < 0.1) on chromosome 1, 5 and 16 were identified. Pathway analysis showed that two biological pathways, which are related to immune response, were strongly associated with the candidate genes surrounding identified SNPs, and their influences were mostly on antigen processing and presentation, and cellular structure.
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Affiliation(s)
- V Raeesi
- Department of Animal Science, Tarbiat Modares University, Tehran, Iran
| | - A Ehsani
- Department of Animal Science, Tarbiat Modares University, Tehran, Iran
| | - R V Torshizi
- Department of Animal Science, Tarbiat Modares University, Tehran, Iran
| | - M Sargolzaei
- Department of Animal Biosciences, University of Guelph, Guelph, ON, Canada.,Semex Alliance, Guelph, ON, Canada
| | - A A Masoudi
- Department of Animal Science, Tarbiat Modares University, Tehran, Iran
| | - R Dideban
- Department of Animal Science, Tarbiat Modares University, Tehran, Iran
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13
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Schaupper M, Jeltsch M, Rohringer S, Redl H, Holnthoner W. Lymphatic Vessels in Regenerative Medicine and Tissue Engineering. TISSUE ENGINEERING PART B-REVIEWS 2016; 22:395-407. [DOI: 10.1089/ten.teb.2016.0034] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Mira Schaupper
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
- Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Michael Jeltsch
- Wihuri Research Institute and Translational Cancer Biology Program, University of Helsinki, Helsinki, Finland
| | | | - Heinz Redl
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
- Austrian Cluster for Tissue Regeneration, Vienna, Austria
| | - Wolfgang Holnthoner
- Ludwig Boltzmann Institute for Experimental and Clinical Traumatology, Vienna, Austria
- Austrian Cluster for Tissue Regeneration, Vienna, Austria
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14
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Prados A, Kollias G, Koliaraki V. CollagenVI-Cre mice: A new tool to target stromal cells in secondary lymphoid organs. Sci Rep 2016; 6:33027. [PMID: 27604178 PMCID: PMC5015111 DOI: 10.1038/srep33027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2016] [Accepted: 08/16/2016] [Indexed: 12/26/2022] Open
Abstract
Stromal cells in secondary lymphoid organs (SLOs) are non-hematopoietic cells involved in the regulation of adaptive immune responses. Three major stromal populations have been identified in adult SLOs: fibroblastic reticular cells (FRCs), follicular dendritic cells (FDCs) and marginal reticular cells (MRCs). The properties of these individual populations are not clearly defined, mainly due to the lack of appropriate genetic tools, especially for MRCs. Here, we analyzed stromal cell targeting in SLOs from a transgenic mouse strain that expresses Cre recombinase under the CollagenVI promoter, using lineage tracing approaches. We show that these mice target specifically MRCs and FDCs, but not FRCs in Peyer’s patches and isolated lymphoid follicles in the intestine. In contrast, stromal cells in lymph nodes and the spleen do not express the transgene, which renders ColVI-cre mice ideal for the specific targeting of stromal cells in the gut-associated lymphoid tissue (GALT). This funding further supports the hypothesis of organ-specific stromal precursors in SLOs. Interestingly, in all tissues analyzed, there was also high specificity for perivascular cells, which have been proposed to act as FDC precursors. Taken together, ColVI-Cre mice are a useful new tool for the dissection of MRC- and FDC-specific functions and plasticity in the GALT.
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Affiliation(s)
- Alejandro Prados
- Biomedical Sciences Research Center "Alexander Fleming", 16672 Vari, Greece
| | - George Kollias
- Biomedical Sciences Research Center "Alexander Fleming", 16672 Vari, Greece.,Department of Physiology, Medical School, National and Kapodistrian University of Athens, 11527 Athens, Greece
| | - Vasiliki Koliaraki
- Biomedical Sciences Research Center "Alexander Fleming", 16672 Vari, Greece
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15
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Ciré S, Da Rocha S, Ferrand M, Collins MK, Galy A. In Vivo Gene Delivery to Lymph Node Stromal Cells Leads to Transgene-specific CD8+ T Cell Anergy in Mice. Mol Ther 2016; 24:1965-1973. [PMID: 27562586 DOI: 10.1038/mt.2016.168] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 08/16/2016] [Indexed: 12/22/2022] Open
Abstract
Lymph node stromal cells play a role in self-tolerance by presenting tissue antigens to T cells. Yet, immunomodulatory properties of lymphoid tissue stroma, particularly toward CD4+ T cells, remain insufficiently characterized by lack of tools to target antigens for presentation by stromal cells. A lentiviral vector was therefore designed for antigen delivery to MHC class II+ cells of nonhematopoietic origin. Following intravenous vector delivery, the transgene was detected in lymph node gp38+ stromal cells which were CD45- MHCII+ and partly positive for CD86 and CTLA4 or B7-H4. The transgene was not detected in classical dendritic cells of lymph nodes or spleen. Transgene-specific CD4+ and CD8+ T cell responses were primed and regulatory T cells were also induced but effector T cell response did not develop, even after a peptide boost. Antigen-specific CD8+ T cells were not cytolytic in vivo. Thus, expressing a neo-antigen in MHC-II+ lymph node stroma seems to trigger blunt CD4 T cell responses leading to antigen-specific CD8+ T cell anergy. These results open up new perspectives to further characterize lymph node stromal cell functional properties and to develop gene transfer protocols targeting lymph node stroma to induce peripheral tolerance.
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Affiliation(s)
- Séverine Ciré
- Research unit UMR_S951, Genethon, Inserm, Univ Evry, EPHE, Evry, France
| | - Sylvie Da Rocha
- Research unit UMR_S951, Genethon, Inserm, Univ Evry, EPHE, Evry, France
| | - Maxime Ferrand
- Research unit UMR_S951, Genethon, Inserm, Univ Evry, EPHE, Evry, France
| | - Mary K Collins
- Infection and Immunity Department, University College London, London, UK; National Institute of Biological Standards and Control, Potters Bar, UK
| | - Anne Galy
- Research unit UMR_S951, Genethon, Inserm, Univ Evry, EPHE, Evry, France.
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16
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Martinez-Corral I, Stanczuk L, Frye M, Ulvmar MH, Diéguez-Hurtado R, Olmeda D, Makinen T, Ortega S. Vegfr3-CreER T2 mouse, a new genetic tool for targeting the lymphatic system. Angiogenesis 2016; 19:433-45. [DOI: 10.1007/s10456-016-9505-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2015] [Accepted: 03/03/2016] [Indexed: 01/26/2023]
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17
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Hirosue S, Dubrot J. Modes of Antigen Presentation by Lymph Node Stromal Cells and Their Immunological Implications. Front Immunol 2015; 6:446. [PMID: 26441957 PMCID: PMC4561840 DOI: 10.3389/fimmu.2015.00446] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2015] [Accepted: 08/17/2015] [Indexed: 12/15/2022] Open
Abstract
Antigen presentation is no longer the exclusive domain of cells of hematopoietic origin. Recent works have demonstrated that lymph node stromal cell (LNSC) populations, such as fibroblastic reticular cells, lymphatic and blood endothelial cells, not only provide a scaffold for lymphocyte interactions but also exhibit active immunomodulatory roles that are critical to mounting and resolving effective immune responses. Importantly, LNSCs possess the ability to present antigens and establish antigen-specific interactions with T cells. One example is the expression of peripheral tissue antigens, which are presented on major histocompatibility complex (MHC)-I molecules with tolerogenic consequences on T cells. Additionally, exogenous antigens, including self and tumor antigens, can be processed and presented on MHC-I complexes, which result in dysfunctional activation of antigen-specific CD8+ T cells. While MHC-I is widely expressed on cells of both hematopoietic and non-hematopoietic origins, antigen presentation via MHC-II is more precisely regulated. Nevertheless, LNSCs are capable of endogenously expressing, or alternatively, acquiring MHC-II molecules. Transfer of antigen between LNSC and dendritic cells in both directions has been recently suggested to promote tolerogenic roles of LNSCs on the CD4+ T cell compartment. Thus, antigen presentation by LNSCs is thought to be a mechanism that promotes the maintenance of peripheral tolerance as well as generates a pool of diverse antigen-experienced T cells for protective immunity. This review aims to integrate the current and emerging literature to highlight the importance of LNSCs in immune responses, and emphasize their role in antigen trafficking, retention, and presentation.
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Affiliation(s)
- Sachiko Hirosue
- Institute of Bioengineering, École Polytechnique Fédéral de Lausanne , Lausanne , Switzerland
| | - Juan Dubrot
- Department of Pathology and Immunology, Université de Genève , Geneva , Switzerland
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18
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Owens BMJ. Inflammation, Innate Immunity, and the Intestinal Stromal Cell Niche: Opportunities and Challenges. Front Immunol 2015; 6:319. [PMID: 26150817 PMCID: PMC4471728 DOI: 10.3389/fimmu.2015.00319] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Accepted: 06/03/2015] [Indexed: 01/01/2023] Open
Abstract
Stromal cells of multiple tissues contribute to immune-mediated protective responses and, conversely, the pathological tissue changes associated with chronic inflammatory disease. However, unlike hematopoietic immune cells, tissue stromal cell populations remain poorly characterized with respect to specific surface marker expression, their ontogeny, self-renewal, and proliferative capacity within tissues and the extent to which they undergo phenotypic immunological changes during the course of an infectious or inflammatory insult. Extending our knowledge of the immunological features of stromal cells provides an exciting opportunity to further dissect the underlying biology of many important immune-mediated diseases, although several challenges remain in bringing the emerging field of stromal immunology to equivalence with the study of the hematopoietic immune cell compartment. This review highlights recent studies that have begun unraveling the complexity of tissue stromal cell function in immune responses, with a focus on the intestine, and proposes strategies for the development of the field to uncover the great potential for stromal immunology to contribute to our understanding of the fundamental pathophysiology of disease, and the opening of new therapeutic avenues in multiple chronic inflammatory conditions.
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Affiliation(s)
- Benjamin M J Owens
- Translational Gastroenterology Unit, Experimental Medicine Division, Nuffield Department of Clinical Medicine, John Radcliffe Hospital, University of Oxford , Oxford , UK ; Somerville College, University of Oxford , Oxford , UK
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19
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Onder L, Nindl V, Scandella E, Chai Q, Cheng HW, Caviezel-Firner S, Novkovic M, Bomze D, Maier R, Mair F, Ledermann B, Becher B, Waisman A, Ludewig B. Alternative NF-κB signaling regulates mTEC differentiation from podoplanin-expressing precursors in the cortico-medullary junction. Eur J Immunol 2015; 45:2218-31. [PMID: 25973789 DOI: 10.1002/eji.201545677] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 04/23/2015] [Accepted: 05/12/2015] [Indexed: 01/08/2023]
Abstract
The thymic epithelium forms specialized niches to enable thymocyte differentiation. While the common epithelial progenitor of medullary and cortical thymic epithelial cells (mTECs and cTECs) is well defined, early stages of mTEC lineage specification have remained elusive. Here, we utilized in vivo targeting of mTECs to resolve their differentiation pathways and to determine whether mTEC progenitors participate in thymocyte education. We found that mTECs descend from a lineage committed, podoplanin (PDPN)-expressing progenitor located at the cortico-medullary junction. PDPN(+) junctional TECs (jTECs) represent a distinct TEC population that builds the thymic medulla, but only partially supports negative selection and thymocyte differentiation. Moreover, conditional gene targeting revealed that abrogation of alternative NF-κB pathway signaling in the jTEC stage completely blocked mTEC development. Taken together, this study identifies jTECs as lineage-committed mTEC progenitors and shows that NF-κB-dependent progression of jTECs to mTECs is critical to secure central tolerance.
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Affiliation(s)
- Lucas Onder
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Veronika Nindl
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Elke Scandella
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Qian Chai
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Hung-Wei Cheng
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | | | - Mario Novkovic
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - David Bomze
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Reinhard Maier
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland
| | - Florian Mair
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Birgit Ledermann
- Institute of Laboratory Animal Sciences, University of Zurich, Zurich, Switzerland
| | - Burkhard Becher
- Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
| | - Ari Waisman
- Institute of Molecular Medicine, University of Mainz, Mainz, Germany
| | - Burkhard Ludewig
- Institute of Immunobiology, Kantonsspital St. Gallen, St. Gallen, Switzerland.,Institute of Experimental Immunology, University of Zurich, Zurich, Switzerland
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20
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Roles of lymphatic endothelial cells expressing peripheral tissue antigens in CD4 T-cell tolerance induction. Nat Commun 2015; 6:6771. [PMID: 25857745 PMCID: PMC4403767 DOI: 10.1038/ncomms7771] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Accepted: 02/25/2015] [Indexed: 11/09/2022] Open
Abstract
Lymphatic endothelial cells (LECs) directly express peripheral tissue antigens and induce CD8 T-cell deletional tolerance. LECs express MHC-II molecules, suggesting they might also tolerize CD4 T cells. We demonstrate that when β-galactosidase (β-gal) is expressed in LECs, β-gal-specific CD8 T cells undergo deletion via the PD-1/PD-L1 and LAG-3/MHC-II pathways. In contrast, LECs do not present endogenous β-gal in the context of MHC-II molecules to β-gal-specific CD4 T cells. Lack of presentation is independent of antigen localization, as membrane-bound haemagglutinin and I-Eα are also not presented by MHC-II molecules. LECs express invariant chain and cathepsin L, but not H2-M, suggesting that they cannot load endogenous antigenic peptides onto MHC-II molecules. Importantly, LECs transfer β-gal to dendritic cells, which subsequently present it to induce CD4 T-cell anergy. Therefore, LECs serve as an antigen reservoir for CD4 T-cell tolerance, and MHC-II molecules on LECs are used to induce CD8 T-cell tolerance via LAG-3. Lymphatic endothelial cells (LECs) induce peripheral tolerance of CD8 T cells. Here the authors show that LECs cannot directly tolerize CD4 T cells as they lack the machinery for loading the antigenic peptide to MHC-II; instead, LECs pass these antigens to dendritic cells that induce CD4 tolerance.
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21
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Bianchi R, Teijeira A, Proulx ST, Christiansen AJ, Seidel CD, Rülicke T, Mäkinen T, Hägerling R, Halin C, Detmar M. A transgenic Prox1-Cre-tdTomato reporter mouse for lymphatic vessel research. PLoS One 2015; 10:e0122976. [PMID: 25849579 PMCID: PMC4388455 DOI: 10.1371/journal.pone.0122976] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 02/26/2015] [Indexed: 01/08/2023] Open
Abstract
The lymphatic vascular system plays an active role in immune cell trafficking, inflammation and cancer spread. In order to provide an in vivo tool to improve our understanding of lymphatic vessel function in physiological and pathological conditions, we generated and characterized a tdTomato reporter mouse and crossed it with a mouse line expressing Cre recombinase under the control of the lymphatic specific promoter Prox1 in an inducible fashion. We found that the tdTomato fluorescent signal recapitulates the expression pattern of Prox1 in lymphatic vessels and other known Prox1-expressing organs. Importantly, tdTomato co-localized with the lymphatic markers Prox1, LYVE-1 and podoplanin as assessed by whole-mount immunofluorescence and FACS analysis. The tdTomato reporter was brighter than a previously established red fluorescent reporter line. We confirmed the applicability of this animal model to intravital microscopy of dendritic cell migration into and within lymphatic vessels, and to fluorescence-activated single cell analysis of lymphatic endothelial cells. Additionally, we were able to describe the early morphological changes of the lymphatic vasculature upon induction of skin inflammation. The Prox1-Cre-tdTomato reporter mouse thus shows great potential for lymphatic research.
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Affiliation(s)
- Roberta Bianchi
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, ETH Zurich, Zurich, Switzerland
| | - Alvaro Teijeira
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, ETH Zurich, Zurich, Switzerland
| | - Steven T. Proulx
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, ETH Zurich, Zurich, Switzerland
| | - Ailsa J. Christiansen
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, ETH Zurich, Zurich, Switzerland
| | - Catharina D. Seidel
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, ETH Zurich, Zurich, Switzerland
| | - Thomas Rülicke
- Institute of Laboratory Animal Sciences, University of Veterinary Medicine, Vienna, Austria
| | - Taija Mäkinen
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - René Hägerling
- Mammalian Cell Signaling Laboratory, Department of Vascular Cell Biology, Max-Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Cornelia Halin
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, ETH Zurich, Zurich, Switzerland
| | - Michael Detmar
- Institute of Pharmaceutical Sciences, Swiss Federal Institute of Technology, ETH Zurich, Zurich, Switzerland
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22
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Fasnacht N, Huang HY, Koch U, Favre S, Auderset F, Chai Q, Onder L, Kallert S, Pinschewer DD, MacDonald HR, Tacchini-Cottier F, Ludewig B, Luther SA, Radtke F. Specific fibroblastic niches in secondary lymphoid organs orchestrate distinct Notch-regulated immune responses. ACTA ACUST UNITED AC 2014; 211:2265-79. [PMID: 25311507 PMCID: PMC4203954 DOI: 10.1084/jem.20132528] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Fasnacht et al. now show that fibroblasts in secondary lymphoid organs are responsible for the production of Notch ligands regulating the differentiation of immune cells Fibroblast-like cells of secondary lymphoid organs (SLO) are important for tissue architecture. In addition, they regulate lymphocyte compartmentalization through the secretion of chemokines, and participate in the orchestration of appropriate cell–cell interactions required for adaptive immunity. Here, we provide data demonstrating the functional importance of SLO fibroblasts during Notch-mediated lineage specification and immune response. Genetic ablation of the Notch ligand Delta-like (DL)1 identified splenic fibroblasts rather than hematopoietic or endothelial cells as niche cells, allowing Notch 2–driven differentiation of marginal zone B cells and of Esam+ dendritic cells. Moreover, conditional inactivation of DL4 in lymph node fibroblasts resulted in impaired follicular helper T cell differentiation and, consequently, in reduced numbers of germinal center B cells and absence of high-affinity antibodies. Our data demonstrate previously unknown roles for DL ligand-expressing fibroblasts in SLO niches as drivers of multiple Notch-mediated immune differentiation processes.
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Affiliation(s)
- Nicolas Fasnacht
- Ecole Polytechnique Fédérale de Lausanne, School of Life Sciences, Swiss Experimental Cancer Research, 1015 Lausanne, Switzerland
| | - Hsin-Ying Huang
- Department of Biochemistry, WHO Immunology Research and Training Center, and Ludwig Center for Cancer Research, University of Lausanne, 1066 Epalinges, Switzerland
| | - Ute Koch
- Ecole Polytechnique Fédérale de Lausanne, School of Life Sciences, Swiss Experimental Cancer Research, 1015 Lausanne, Switzerland
| | - Stéphanie Favre
- Department of Biochemistry, WHO Immunology Research and Training Center, and Ludwig Center for Cancer Research, University of Lausanne, 1066 Epalinges, Switzerland
| | - Floriane Auderset
- Department of Biochemistry, WHO Immunology Research and Training Center, and Ludwig Center for Cancer Research, University of Lausanne, 1066 Epalinges, Switzerland Department of Biochemistry, WHO Immunology Research and Training Center, and Ludwig Center for Cancer Research, University of Lausanne, 1066 Epalinges, Switzerland
| | - Qian Chai
- Institute of Immunobiology, Kantonsspital St. Gallen, 9007 St. Gallen, Switzerland
| | - Lucas Onder
- Institute of Immunobiology, Kantonsspital St. Gallen, 9007 St. Gallen, Switzerland
| | - Sandra Kallert
- Department of Biomedicine - Haus Petersplatz, Division of Experimental Virology, University of Basel, Petersplatz 10, 4003 Basel, Switzerland
| | - Daniel D Pinschewer
- Department of Biomedicine - Haus Petersplatz, Division of Experimental Virology, University of Basel, Petersplatz 10, 4003 Basel, Switzerland
| | - H Robson MacDonald
- Department of Biochemistry, WHO Immunology Research and Training Center, and Ludwig Center for Cancer Research, University of Lausanne, 1066 Epalinges, Switzerland
| | - Fabienne Tacchini-Cottier
- Department of Biochemistry, WHO Immunology Research and Training Center, and Ludwig Center for Cancer Research, University of Lausanne, 1066 Epalinges, Switzerland Department of Biochemistry, WHO Immunology Research and Training Center, and Ludwig Center for Cancer Research, University of Lausanne, 1066 Epalinges, Switzerland
| | - Burkhard Ludewig
- Institute of Immunobiology, Kantonsspital St. Gallen, 9007 St. Gallen, Switzerland
| | - Sanjiv A Luther
- Department of Biochemistry, WHO Immunology Research and Training Center, and Ludwig Center for Cancer Research, University of Lausanne, 1066 Epalinges, Switzerland
| | - Freddy Radtke
- Ecole Polytechnique Fédérale de Lausanne, School of Life Sciences, Swiss Experimental Cancer Research, 1015 Lausanne, Switzerland
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23
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Abe J, Shichino S, Ueha S, Hashimoto SI, Tomura M, Inagaki Y, Stein JV, Matsushima K. Lymph node stromal cells negatively regulate antigen-specific CD4+ T cell responses. THE JOURNAL OF IMMUNOLOGY 2014; 193:1636-44. [PMID: 25024385 DOI: 10.4049/jimmunol.1302946] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Lymph node (LN) stromal cells (LNSCs) form the functional structure of LNs and play an important role in lymphocyte survival and the maintenance of immune tolerance. Despite their broad spectrum of function, little is known about LNSC responses during microbial infection. In this study, we demonstrate that LNSC subsets display distinct kinetics following vaccinia virus infection. In particular, compared with the expansion of other LNSC subsets and the total LN cell population, the expansion of fibroblastic reticular cells (FRCs) was delayed and sustained by noncirculating progenitor cells. Notably, newly generated FRCs were preferentially located in perivascular areas. Viral clearance in reactive LNs preceded the onset of FRC expansion, raising the possibility that viral infection in LNs may have a negative impact on the differentiation of FRCs. We also found that MHC class II expression was upregulated in all LNSC subsets until day 10 postinfection. Genetic ablation of radioresistant stromal cell-mediated Ag presentation resulted in slower contraction of Ag-specific CD4(+) T cells. We propose that activated LNSCs acquire enhanced Ag-presentation capacity, serving as an extrinsic brake system for CD4(+) T cell responses. Disrupted function and homeostasis of LNSCs may contribute to immune deregulation in the context of chronic viral infection, autoimmunity, and graft-versus-host disease.
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Affiliation(s)
- Jun Abe
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan; Japan Science and Technology Agency, Tokyo 102-8666, Japan; Theodor Kocher Institute, University of Bern, CH-3012 Bern, Switzerland
| | - Shigeyuki Shichino
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan; Japan Science and Technology Agency, Tokyo 102-8666, Japan
| | - Satoshi Ueha
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan; Japan Science and Technology Agency, Tokyo 102-8666, Japan
| | - Shin-ichi Hashimoto
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan; Japan Science and Technology Agency, Tokyo 102-8666, Japan; Division of Nephrology, Department of Laboratory Medicine, Kanazawa University, Ishikawa 920-1192, Japan
| | - Michio Tomura
- Center for Innovation in Immunoregulative Technology and Therapeutics, Graduate School of Medicine, Kyoto University, Kyoto 606-8501, Japan; and
| | - Yutaka Inagaki
- Japan Science and Technology Agency, Tokyo 102-8666, Japan; Center for Matrix Biology and Medicine, Graduate School of Medicine, Institute of Medical Sciences, Tokai University, Kanagawa 259-1143, Japan
| | - Jens V Stein
- Theodor Kocher Institute, University of Bern, CH-3012 Bern, Switzerland
| | - Kouji Matsushima
- Department of Molecular Preventive Medicine, Graduate School of Medicine, University of Tokyo, Tokyo 113-0033, Japan; Japan Science and Technology Agency, Tokyo 102-8666, Japan;
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24
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Multifunctional roles of reticular fibroblastic cells: more than meets the eye? J Immunol Res 2014; 2014:402038. [PMID: 24829927 PMCID: PMC4009236 DOI: 10.1155/2014/402038] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 03/25/2014] [Accepted: 03/25/2014] [Indexed: 01/28/2023] Open
Abstract
Fibroblastic reticular cells (FRCs) are stromal cells found in secondary lymphoid organ. Despite its structural function in the lymph nodes being well established, recent studies indicate that the FRCs also play a key role in immunological processes, associated with cell transit, immune response, and cells activation quality, and contribute to peripheral tolerance. To this end, we focus this review on lymph nodes FRC characterization and discuss functional aspects such as production of cytokines and chemokines and their involvement in the immune response, seeking to establish whether certain subsets have a more functional specialization.
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25
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Duraes FV, Thelemann C, Sarter K, Acha-Orbea H, Hugues S, Reith W. Role of major histocompatibility complex class II expression by non-hematopoietic cells in autoimmune and inflammatory disorders: facts and fiction. ACTA ACUST UNITED AC 2014; 82:1-15. [PMID: 23745569 DOI: 10.1111/tan.12136] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
It is well established that interactions between CD4(+) T cells and major histocompatibility complex class II (MHCII) positive antigen-presenting cells (APCs) of hematopoietic origin play key roles in both the maintenance of tolerance and the initiation and development of autoimmune and inflammatory disorders. In sharp contrast, despite nearly three decades of intensive research, the functional relevance of MHCII expression by non-hematopoietic tissue-resident cells has remained obscure. The widespread assumption that MHCII expression by non-hematopoietic APCs has an impact on autoimmune and inflammatory diseases has in most instances neither been confirmed nor excluded by indisputable in vivo data. Here we review and put into perspective conflicting in vitro and in vivo results on the putative impact of MHCII expression by non-hematopoietic APCs--in both target organs and secondary lymphoid tissues--on the initiation and development of representative autoimmune and inflammatory disorders. Emphasis will be placed on the lacunar status of our knowledge in this field. We also discuss new mouse models--developed on the basis of our understanding of the molecular mechanisms that regulate MHCII expression--that constitute valuable tools for filling the severe gaps in our knowledge on the functions of non-hematopoietic APCs in inflammatory conditions.
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Affiliation(s)
- F V Duraes
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Geneva, Switzerland
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26
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Rouhani SJ, Eccles JD, Tewalt EF, Engelhard VH. Regulation of T-cell Tolerance by Lymphatic Endothelial Cells. ACTA ACUST UNITED AC 2014; 5. [PMID: 25580369 PMCID: PMC4286360 DOI: 10.4172/2155-9899.1000242] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Lymphatic endothelial cells are most often thought of as structural cells that form the lymphatic vasculature, which transports fluid out of peripheral tissues and transports antigens and antigen presenting cells to lymph nodes. Recently, it has been shown that lymphatic endothelial cells also dynamically respond to and influence the immune response in several ways. Here, we describe how lymphatic endothelial cells induce peripheral T-cell tolerance and how this relates to tolerance induced by other types of antigen presenting cells. Furthermore, the ability of lymphatic endothelial cells to alter immune responses under steady-state or inflammatory conditions is explored, and the therapeutic potential of bypassing lymphatic endothelial cell-induced tolerance to enhance cancer immunotherapy is discussed.
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Affiliation(s)
- Sherin J Rouhani
- Carter Immunology Center and Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Jacob D Eccles
- Carter Immunology Center and Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Eric F Tewalt
- Carter Immunology Center and Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
| | - Victor H Engelhard
- Carter Immunology Center and Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine, Charlottesville, VA 22908, USA
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27
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Kain MJW, Owens BMJ. Stromal cell regulation of homeostatic and inflammatory lymphoid organogenesis. Immunology 2013; 140:12-21. [PMID: 23621403 DOI: 10.1111/imm.12119] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 04/07/2013] [Accepted: 04/09/2013] [Indexed: 12/22/2022] Open
Abstract
Secondary lymphoid organs function to increase the efficiency of interactions between rare, antigen-specific lymphocytes and antigen presenting cells, concentrating antigen and lymphocytes in a supportive environment that facilitates the initiation of an adaptive immune response. Homeostatic lymphoid tissue organogenesis proceeds via exquisitely controlled spatiotemporal interactions between haematopoietic lymphoid tissue inducer populations and multiple subsets of non-haematopoietic stromal cells. However, it is becoming clear that in a range of inflammatory contexts, ectopic or tertiary lymphoid tissues can develop inappropriately under pathological stress. Here we summarize the role of stromal cells in the development of homeostatic lymphoid tissue, and assess emerging evidence that suggests a critical role for stromal involvement in the tertiary lymphoid tissue development associated with chronic infections and inflammation.
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Affiliation(s)
- Matthew J W Kain
- University of Oxford Medical School, John Radcliffe Hospital, Headington, Oxford, UK
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28
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Castagnaro L, Lenti E, Maruzzelli S, Spinardi L, Migliori E, Farinello D, Sitia G, Harrelson Z, Evans SM, Guidotti LG, Harvey RP, Brendolan A. Nkx2-5(+)islet1(+) mesenchymal precursors generate distinct spleen stromal cell subsets and participate in restoring stromal network integrity. Immunity 2013; 38:782-91. [PMID: 23601687 DOI: 10.1016/j.immuni.2012.12.005] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Accepted: 12/21/2012] [Indexed: 02/07/2023]
Abstract
Secondary lymphoid organ stromal cells comprise different subsets whose origins remain unknown. Herein, we exploit a genetic lineage-tracing approach to show that splenic fibroblastic reticular cells (FRCs), follicular dendritic cells (FDCs), marginal reticular cells (MRCs), and mural cells, but not endothelial cells, originate from embryonic mesenchymal progenitors of the Nkx2-5(+)Islet1(+) lineage. This lineage include embryonic mesenchymal cells with lymphoid tissue organizer (LTo) activity capable also of supporting ectopic lymphoid-like structures and a subset of resident spleen stromal cells that proliferate and regenerate the splenic stromal microenvironment following resolution of a viral infection. These findings identify progenitor cells that generate stromal diversity in spleen development and repair and suggest the existence of multipotent stromal progenitors in the adult spleen with regenerative capacity.
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Affiliation(s)
- Laura Castagnaro
- Division of Molecular Oncology, San Raffaele Scientific Institute, Milan, Italy
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29
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Chai Q, Onder L, Scandella E, Gil-Cruz C, Perez-Shibayama C, Cupovic J, Danuser R, Sparwasser T, Luther SA, Thiel V, Rülicke T, Stein JV, Hehlgans T, Ludewig B. Maturation of lymph node fibroblastic reticular cells from myofibroblastic precursors is critical for antiviral immunity. Immunity 2013; 38:1013-24. [PMID: 23623380 PMCID: PMC7111182 DOI: 10.1016/j.immuni.2013.03.012] [Citation(s) in RCA: 180] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Accepted: 03/29/2013] [Indexed: 01/11/2023]
Abstract
The stromal scaffold of the lymph node (LN) paracortex is built by fibroblastic reticular cells (FRCs). Conditional ablation of lymphotoxin-β receptor (LTβR) expression in LN FRCs and their mesenchymal progenitors in developing LNs revealed that LTβR-signaling in these cells was not essential for the formation of LNs. Although T cell zone reticular cells had lost podoplanin expression, they still formed a functional conduit system and showed enhanced expression of myofibroblastic markers. However, essential immune functions of FRCs, including homeostatic chemokine and interleukin-7 expression, were impaired. These changes in T cell zone reticular cell function were associated with increased susceptibility to viral infection. Thus, myofibroblasic FRC precursors are able to generate the basic T cell zone infrastructure, whereas LTβR-dependent maturation of FRCs guarantees full immunocompetence and hence optimal LN function during infection. Novel transgenic mouse model that targets FRCs in adult lymph nodes FRC-specific ablation of the LTβR did not abrogate LN development Myofibroblastic FRC precursors generate the basic infrastructure of the adult LN LTβR-mediated FRC maturation is critical for the maintenance of immunocompentence
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Affiliation(s)
- Qian Chai
- Institute of Immunobiology, Kantonal Hospital St. Gallen, 9007 St. Gallen, Switzerland
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30
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Abstract
A growing body of evidence suggests that non-hematopoietic stromal cells of the intestine have multiple roles in immune responses and inflammation at this mucosal site. Despite this, many still consider gut stromal cells as passive structural entities, with past research focused heavily on their roles in fibrosis, tumor progression, and wound healing, rather than their contributions to immune function. In this review, we discuss our current knowledge of stromal cells in intestinal immunity, highlighting the many immunological axes in which stromal cells have a functional role. We also consider emerging data that broaden the potential scope of their contribution to immunity in the gut and argue that these so-called "non-immune" cells are reclassified in light of their diverse contributions to intestinal innate immunity and the maintenance of mucosal homeostasis.
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31
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Tewalt EF, Cohen JN, Rouhani SJ, Engelhard VH. Lymphatic endothelial cells - key players in regulation of tolerance and immunity. Front Immunol 2012; 3:305. [PMID: 23060883 PMCID: PMC3460259 DOI: 10.3389/fimmu.2012.00305] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 09/14/2012] [Indexed: 01/11/2023] Open
Abstract
The lymphatic vasculature provides routes for dendritic cell and lymphocyte migration into and out of lymph nodes. Lymphatic endothelial cells (LEC) control these processes by expression of CCL21, sphingosine-1-phosphate, and adhesion molecules. LEC express MHC-I and MHC-II, but not costimulatory molecules, and present antigen on MHC-I via both direct and cross-presentation. Whether LEC present to CD4 T cells on MHC-II is unknown. Interestingly, LEC express antigens otherwise restricted to a small number of peripheral tissues in an autoimmune regulatory element-independent manner. Direct presentation of peripheral tissue antigens (PTA) to CD8 T cells results in abortive proliferation and deletion, due to both a lack of costimulation and active PD-L1 engagement. Autoimmunity develops when deletion is subverted, suggesting that LEC presentation of PTA could lead to human disease if PD-1 signaling were impaired by genetic polymorphisms, or aberrant costimulation occurred during inflammation. The expression of additional inhibitory molecules, which are not involved in LEC-mediated deletion, suggests that LEC may have additional immunoregulatory roles. LEC express receptors for several immunomodulatory molecules whose engagement alters their phenotype and function. In this review we describe the role of LEC in distinct anatomical locations in controlling immune cell trafficking, as well as their emerging role in the regulation of T cell tolerance and immunity.
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Affiliation(s)
- Eric F Tewalt
- Department of Microbiology, Immunology, and Cancer Biology, University of Virginia School of Medicine Charlottesville, VA, USA ; Carter Immunology Center, University of Virginia School of Medicine Charlottesville, VA, USA
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32
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Astarita JL, Acton SE, Turley SJ. Podoplanin: emerging functions in development, the immune system, and cancer. Front Immunol 2012; 3:283. [PMID: 22988448 PMCID: PMC3439854 DOI: 10.3389/fimmu.2012.00283] [Citation(s) in RCA: 251] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Accepted: 08/22/2012] [Indexed: 12/16/2022] Open
Abstract
Podoplanin (PDPN) is a well-conserved, mucin-type transmembrane protein expressed in multiple tissues during ontogeny and in adult animals, including the brain, heart, kidney, lungs, osteoblasts, and lymphoid organs. Studies of PDPN-deficient mice have demonstrated that this molecule plays a critical role in development of the heart, lungs, and lymphatic system. PDPN is widely used as a marker for lymphatic endothelial cells and fibroblastic reticular cells of lymphoid organs and for lymphatics in the skin and tumor microenvironment. Much of the mechanistic insight into PDPN biology has been gleaned from studies of tumor cells; tumor cells often upregulate PDPN as they undergo epithelial-mesenchymal transition and this upregulation is correlated with increased motility and metastasis. The physiological role of PDPN that has been most studied is its ability to aggregate and activate CLEC-2-expressing platelets, as PDPN is the only known endogenous ligand for CLEC-2. However, more recent studies have revealed that PDPN also plays crucial roles in the biology of immune cells, including T cells and dendritic cells. This review will provide a comprehensive overview of the diverse roles of PDPN in development, immunology, and cancer.
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Affiliation(s)
- Jillian L Astarita
- Department of Cancer Immunology and AIDS, Dana Farber Cancer Institute Boston, MA, USA ; Division of Medical Sciences, Harvard Medical School Boston, MA, USA
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33
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Siegert S, Luther SA. Positive and negative regulation of T cell responses by fibroblastic reticular cells within paracortical regions of lymph nodes. Front Immunol 2012; 3:285. [PMID: 22973278 PMCID: PMC3438460 DOI: 10.3389/fimmu.2012.00285] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 08/25/2012] [Indexed: 12/21/2022] Open
Abstract
Fibroblastic reticular cells (FRC) form the structural backbone of the T cell rich zones in secondary lymphoid organs (SLO), but also actively influence the adaptive immune response. They provide a guidance path for immigrating T lymphocytes and dendritic cells (DC) and are the main local source of the cytokines CCL19, CCL21, and IL-7, all of which are thought to positively regulate T cell homeostasis and T cell interactions with DC. Recently, FRC in lymph nodes (LN) were also described to negatively regulate T cell responses in two distinct ways. During homeostasis they express and present a range of peripheral tissue antigens, thereby participating in peripheral tolerance induction of self-reactive CD8+ T cells. During acute inflammation T cells responding to foreign antigens presented on DC very quickly release pro-inflammatory cytokines such as interferon γ. These cytokines are sensed by FRC which transiently produce nitric oxide (NO) gas dampening the proliferation of neighboring T cells in a non-cognate fashion. In summary, we propose a model in which FRC engage in a bidirectional crosstalk with both DC and T cells to increase the efficiency of the T cell response. However, during an acute response, FRC limit excessive expansion and inflammatory activity of antigen-specific T cells. This negative feedback loop may help to maintain tissue integrity and function during rapid organ growth.
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Affiliation(s)
- Stefanie Siegert
- Department of Biochemistry, University of Lausanne Epalinges, Switzerland
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