51
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Wang X, Lin X, Zheng Z, Lu B, Wang J, Tan AHM, Zhao M, Loh JT, Ng SW, Chen Q, Xiao F, Huang E, Ko KH, Huang Z, Li J, Kok KH, Lu G, Liu X, Lam KP, Liu W, Zhang Y, Yuen KY, Mak TW, Lu L. Host-derived lipids orchestrate pulmonary γδ T cell response to provide early protection against influenza virus infection. Nat Commun 2021; 12:1914. [PMID: 33772013 PMCID: PMC7997921 DOI: 10.1038/s41467-021-22242-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 03/06/2021] [Indexed: 01/01/2023] Open
Abstract
Innate immunity is important for host defense by eliciting rapid anti-viral responses and bridging adaptive immunity. Here, we show that endogenous lipids released from virus-infected host cells activate lung γδ T cells to produce interleukin 17 A (IL-17A) for early protection against H1N1 influenza infection. During infection, the lung γδ T cell pool is constantly supplemented by thymic output, with recent emigrants infiltrating into the lung parenchyma and airway to acquire tissue-resident feature. Single-cell studies identify IL-17A-producing γδ T (Tγδ17) cells with a phenotype of TCRγδhiCD3hiAQP3hiCXCR6hi in both infected mice and patients with pneumonia. Mechanistically, host cell-released lipids during viral infection are presented by lung infiltrating CD1d+ B-1a cells to activate IL-17A production in γδ T cells via γδTCR-mediated IRF4-dependent transcription. Reduced IL-17A production in γδ T cells is detected in mice either lacking B-1a cells or with ablated CD1d in B cells. Our findings identify a local host-immune crosstalk and define important cellular and molecular mediators for early innate defense against lung viral infection.
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MESH Headings
- Animals
- Antigens, CD1d/immunology
- Antigens, CD1d/metabolism
- Female
- Host-Pathogen Interactions/immunology
- Humans
- Immunity, Innate/immunology
- Influenza A Virus, H1N1 Subtype/immunology
- Influenza A Virus, H1N1 Subtype/physiology
- Influenza, Human/immunology
- Influenza, Human/metabolism
- Influenza, Human/virology
- Interferon Regulatory Factors/immunology
- Interferon Regulatory Factors/metabolism
- Interleukin-17/immunology
- Interleukin-17/metabolism
- Lipids/immunology
- Lung/immunology
- Lung/metabolism
- Lung/virology
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Orthomyxoviridae Infections/immunology
- Orthomyxoviridae Infections/metabolism
- Orthomyxoviridae Infections/virology
- Receptors, Antigen, T-Cell, gamma-delta/immunology
- Receptors, Antigen, T-Cell, gamma-delta/metabolism
- Mice
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Affiliation(s)
- Xiaohui Wang
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China.
- Department of Microbiology, State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong, Hong Kong, China.
| | - Xiang Lin
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China
| | - Zihan Zheng
- Chongqing International Institute for Immunology, Chongqing, China
| | - Bingtai Lu
- Department of Respiratory Medicine and Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Jun Wang
- Department of Respiratory Medicine and Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Andy Hee-Meng Tan
- Bioprocessing Technology Institute, Agency for Science, Technology and Research, Singapore, Singapore
| | - Meng Zhao
- Ministry of Education Key Laboratory of Protein Sciences, Center for Life Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Institute for Immunology, School of Life Sciences, Tsinghua University, Beijing, China
| | - Jia Tong Loh
- Bioprocessing Technology Institute, Agency for Science, Technology and Research, Singapore, Singapore
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore, Singapore
| | - Sze Wai Ng
- Bioprocessing Technology Institute, Agency for Science, Technology and Research, Singapore, Singapore
| | - Qian Chen
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China
| | - Fan Xiao
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China
| | - Enyu Huang
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China
| | - King-Hung Ko
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China
| | - Zhong Huang
- Department of Pathogen Biology and Immunology, Shenzhen University School of Medicine, Shenzhen, China
| | - Jingyi Li
- Chongqing International Institute for Immunology, Chongqing, China
| | - Kin-Hang Kok
- Department of Microbiology, State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong, Hong Kong, China
| | - Gen Lu
- Department of Respiratory Medicine and Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Xiaohui Liu
- National Protein Science Facility, Tsinghua University, Beijing, China
| | - Kong-Peng Lam
- Bioprocessing Technology Institute, Agency for Science, Technology and Research, Singapore, Singapore
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore, Singapore
| | - Wanli Liu
- Ministry of Education Key Laboratory of Protein Sciences, Center for Life Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Institute for Immunology, School of Life Sciences, Tsinghua University, Beijing, China
| | - Yuxia Zhang
- Department of Respiratory Medicine and Guangzhou Institute of Pediatrics, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, China
| | - Kwok-Yung Yuen
- Department of Microbiology, State Key Laboratory of Emerging Infectious Diseases, The University of Hong Kong, Hong Kong, China
| | - Tak Wah Mak
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China
- The Campbell Family Institute for Breast Cancer Research at Princess Margaret Cancer Centre, Ontario Cancer Institute, University Health Network, Toronto, ON, Canada
| | - Liwei Lu
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong, China.
- Chongqing International Institute for Immunology, Chongqing, China.
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52
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Latino I, Gonzalez SF. Spatio-temporal profile of innate inflammatory cells and mediators during influenza virus infection. CURRENT OPINION IN PHYSIOLOGY 2021. [DOI: 10.1016/j.cophys.2020.10.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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53
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Elsaid R, Soares-da-Silva F, Peixoto M, Amiri D, Mackowski N, Pereira P, Bandeira A, Cumano A. Hematopoiesis: A Layered Organization Across Chordate Species. Front Cell Dev Biol 2020; 8:606642. [PMID: 33392196 PMCID: PMC7772317 DOI: 10.3389/fcell.2020.606642] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/19/2020] [Indexed: 12/12/2022] Open
Abstract
The identification of distinct waves of progenitors during development, each corresponding to a specific time, space, and function, provided the basis for the concept of a “layered” organization in development. The concept of a layered hematopoiesis was established by classical embryology studies in birds and amphibians. Recent progress in generating reliable lineage tracing models together with transcriptional and proteomic analyses in single cells revealed that, also in mammals, the hematopoietic system evolves in successive waves of progenitors with distinct properties and fate. During embryogenesis, sequential waves of hematopoietic progenitors emerge at different anatomic sites, generating specific cell types with distinct functions and tissue homing capacities. The first progenitors originate in the yolk sac before the emergence of hematopoietic stem cells, some giving rise to progenies that persist throughout life. Hematopoietic stem cell-derived cells that protect organisms against environmental pathogens follow the same sequential strategy, with subsets of lymphoid cells being only produced during embryonic development. Growing evidence indicates that fetal immune cells contribute to the proper development of the organs they seed and later ensure life-long tissue homeostasis and immune protection. They include macrophages, mast cells, some γδ T cells, B-1 B cells, and innate lymphoid cells, which have “non-redundant” functions, and early perturbations in their development or function affect immunity in the adult. These observations challenged the view that all hematopoietic cells found in the adult result from constant and monotonous production from bone marrow-resident hematopoietic stem cells. In this review, we evaluate evidence for a layered hematopoietic system across species. We discuss mechanisms and selective pressures leading to the temporal generation of different cell types. We elaborate on the consequences of disturbing fetal immune cells on tissue homeostasis and immune development later in life.
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Affiliation(s)
- Ramy Elsaid
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France.,INSERM U1223, Paris, France.,Université de Paris, Céllule Pasteur, Paris, France
| | - Francisca Soares-da-Silva
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France.,INSERM U1223, Paris, France.,Université de Paris, Céllule Pasteur, Paris, France.,I3S-Instituto de Investigação e Inovação em Saúde and INEB-Instituto Nacional de Engenharia Biomédica, Universidade do Porto, Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal.,Graduate Program in Areas of Basic and Applied Biology, Instituto de Ciências Biomeìdicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Marcia Peixoto
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France.,INSERM U1223, Paris, France.,Université de Paris, Céllule Pasteur, Paris, France.,I3S-Instituto de Investigação e Inovação em Saúde and INEB-Instituto Nacional de Engenharia Biomédica, Universidade do Porto, Porto, Portugal.,Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal
| | - Dali Amiri
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France.,INSERM U1223, Paris, France.,Université de Paris, Céllule Pasteur, Paris, France
| | - Nathan Mackowski
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France.,INSERM U1223, Paris, France.,Université de Paris, Céllule Pasteur, Paris, France
| | - Pablo Pereira
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France.,INSERM U1223, Paris, France.,Université de Paris, Céllule Pasteur, Paris, France
| | - Antonio Bandeira
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France.,INSERM U1223, Paris, France.,Université de Paris, Céllule Pasteur, Paris, France
| | - Ana Cumano
- Unit of Lymphocytes and Immunity, Immunology Department, Institut Pasteur, Paris, France.,INSERM U1223, Paris, France.,Université de Paris, Céllule Pasteur, Paris, France
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54
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Honce R, Wohlgemuth N, Meliopoulos VA, Short KR, Schultz-Cherry S. Influenza in High-Risk Hosts-Lessons Learned from Animal Models. Cold Spring Harb Perspect Med 2020; 10:cshperspect.a038604. [PMID: 31871227 DOI: 10.1101/cshperspect.a038604] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Factoring significantly into the global burden of influenza disease are high-risk populations that suffer the bulk of infections. Classically, the very young, very old, and pregnant women have been identified as high-risk populations; however, recent research has uncovered several other conditions that contribute to severe infection. By using varied animal models, researchers have identified molecular mechanisms underpinning the increased likelihood for infection due to obesity and malnourishment, as well as insight into the role sex hormones play in antiviral immunity in males, in females, and across the life span. Additionally, novel comorbidity models have helped elucidate the role of chronic infectious and genetic diseases in influenza virus pathogenesis. Animal models play a vital role in understanding the contribution of host factors to influenza severity and immunity. An in-depth understanding of these host factors represents an important step in reducing the burden of influenza among the growing number of people living with one or more chronic medical conditions.
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Affiliation(s)
- Rebekah Honce
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, USA.,Integrated Program in Biomedical Sciences, Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, Tennessee 38163, USA
| | - Nicholas Wohlgemuth
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, USA
| | - Victoria A Meliopoulos
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, USA
| | - Kirsty R Short
- School of Chemistry and Molecular Biosciences, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia
| | - Stacey Schultz-Cherry
- Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, Tennessee 38105-3678, USA
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55
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Amini A, Pang D, Hackstein CP, Klenerman P. MAIT Cells in Barrier Tissues: Lessons from Immediate Neighbors. Front Immunol 2020; 11:584521. [PMID: 33329559 PMCID: PMC7734211 DOI: 10.3389/fimmu.2020.584521] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 10/26/2020] [Indexed: 12/12/2022] Open
Abstract
Mucosal-associated invariant T (MAIT) cells are innate-like T cells present at considerable frequencies in human blood and barrier tissues, armed with an expanding array of effector functions in response to homeostatic perturbations. Analogous to other barrier immune cells, their phenotype and function is driven by crosstalk with host and dynamic environmental factors, most pertinently the microbiome. Given their distribution, they must function in diverse extracellular milieus. Tissue-specific and adapted functions of barrier immune cells are shaped by transcriptional programs and regulated through a blend of local cellular, inflammatory, physiological, and metabolic mediators unique to each microenvironment. This review compares the phenotype and function of MAIT cells with other barrier immune cells, highlighting potential areas for future exploration. Appreciation of MAIT cell biology within tissues is crucial to understanding their niche in health and disease.
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Affiliation(s)
- Ali Amini
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, United Kingdom
| | - Declan Pang
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, United Kingdom
| | - Carl-Philipp Hackstein
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, United Kingdom
| | - Paul Klenerman
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, United Kingdom
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56
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Prigge AD, Ma R, Coates BM, Singer BD, Ridge KM. Age-Dependent Differences in T-Cell Responses to Influenza A Virus. Am J Respir Cell Mol Biol 2020; 63:415-423. [PMID: 32609537 DOI: 10.1165/rcmb.2020-0169tr] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Respiratory infections from influenza A virus (IAV) cause substantial morbidity and mortality in children relative to adults. T cells play a critical role in the host response to IAV by supporting the innate and humoral responses, mediating cytotoxic activity, and promoting recovery. There are age-dependent differences in the number, subsets, and localization of T cells, which impact the host response to pathogens. In this article, we first review how T cells recognize IAV and examine differences in the resting T-cell populations between juveniles and adults. Next, we describe how the juvenile CD4+, CD8+, and regulatory T-cell responses compare with those in adults and discuss the potential physiologic and clinical consequences of the differences. Finally, we explore the roles of two unconventional T-cell types in the juvenile response to influenza, natural-killer T cells and γδ T cells. A clear understanding of age-dependent differences in the T-cell response is essential to developing therapies to prevent or reverse the deleterious effects of IAV in children.
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Affiliation(s)
- Andrew D Prigge
- Division of Critical Care Medicine, Department of Pediatrics.,Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Ruihua Ma
- Division of Pulmonary and Critical Care Medicine, Department of Medicine
| | - Bria M Coates
- Division of Critical Care Medicine, Department of Pediatrics.,Ann & Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois
| | - Benjamin D Singer
- Division of Pulmonary and Critical Care Medicine, Department of Medicine.,Department of Biochemistry and Molecular Genetics.,Simpson Querrey Center for Epigenetics, and
| | - Karen M Ridge
- Division of Pulmonary and Critical Care Medicine, Department of Medicine.,Department of Cell and Molecular Biology, Northwestern University Feinberg School of Medicine, Northwestern University, Chicago, Illinois; and
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57
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Sabbaghi A, Miri SM, Keshavarz M, Mahooti M, Zebardast A, Ghaemi A. Role of γδ T cells in controlling viral infections with a focus on influenza virus: implications for designing novel therapeutic approaches. Virol J 2020; 17:174. [PMID: 33183352 PMCID: PMC7659406 DOI: 10.1186/s12985-020-01449-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 11/05/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Influenza virus infection is among the most detrimental threats to the health of humans and some animals, infecting millions of people annually all around the world and in many thousands of cases giving rise to pneumonia and death. All those health crises happen despite previous and recent developments in anti-influenza vaccination, suggesting the need for employing more sophisticated methods to control this malign infection. Main body The innate immunity modules are at the forefront of combating against influenza infection in the respiratory tract, among which, innate T cells, particularly gamma-delta (γδ) T cells, play a critical role in filling the gap needed for adaptive immune cells maturation, linking the innate and adaptive immunity together. Upon infection with influenza virus, production of cytokines and chemokines including CCL3, CCL4, and CCL5 from respiratory epithelium recruits γδ T cells at the site of infection in a CCR5 receptor-dependent fashion. Next, γδ T cells become activated in response to influenza virus infection and produce large amounts of proinflammatory cytokines, especially IL-17A. Regardless of γδ T cells' roles in triggering the adaptive arm of the immune system, they also protect the respiratory epithelium by cytolytic and non-cytolytic antiviral mechanisms, as well as by enhancing neutrophils and natural killer cells recruitment to the infection site. CONCLUSION In this review, we explored varied strategies of γδ T cells in defense to influenza virus infection and how they can potentially provide balanced protective immune responses against infected cells. The results may provide a potential window for the incorporation of intact or engineered γδ T cells for developing novel antiviral approaches or for immunotherapeutic purposes.
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Affiliation(s)
- Ailar Sabbaghi
- Department of Influenza and Other Respiratory Viruses, Pasteur Institute of Iran, P.O. Box 1316943551, Tehran, Iran
| | - Seyed Mohammad Miri
- Department of Influenza and Other Respiratory Viruses, Pasteur Institute of Iran, P.O. Box 1316943551, Tehran, Iran
| | - Mohsen Keshavarz
- The Persian Gulf Tropical Medicine Research Center, The Persian Gulf Biomedical Sciences Research Institute, Bushehr University of Medical Sciences, Bushehr, Iran
| | - Mehran Mahooti
- Department of Influenza and Other Respiratory Viruses, Pasteur Institute of Iran, P.O. Box 1316943551, Tehran, Iran
| | - Arghavan Zebardast
- Department of Virology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Amir Ghaemi
- Department of Influenza and Other Respiratory Viruses, Pasteur Institute of Iran, P.O. Box 1316943551, Tehran, Iran.
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58
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Papadopoulou M, Sanchez Sanchez G, Vermijlen D. Innate and adaptive γδ T cells: How, when, and why. Immunol Rev 2020; 298:99-116. [PMID: 33146423 DOI: 10.1111/imr.12926] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Accepted: 09/03/2020] [Indexed: 12/13/2022]
Abstract
γδ T cells comprise the third cell lineage of lymphocytes that use, like αβ T cells and B cells, V(D)J gene rearrangement with the potential to generate a highly diverse T cell receptor (TCR) repertoire. There is no obvious conservation of γδ T cell subsets (based on TCR repertoire and/or function) between mice and human, leading to the notion that human and mouse γδ T cells are highly different. In this review, we focus on human γδ T cells, building on recent studies using high-throughput sequencing to analyze the TCR repertoire in various settings. We make then the comparison with mouse γδ T cell subsets highlighting the similarities and differences and describe the remarkable changes during lifespan of innate and adaptive γδ T cells. Finally, we propose mechanisms contributing to the generation of innate versus adaptive γδ T cells. We conclude that key elements related to the generation of the γδ TCR repertoire and γδ T cell activation/development are conserved between human and mice, highlighting the similarities between these two species.
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Affiliation(s)
- Maria Papadopoulou
- Department of Pharmacotherapy and Pharmaceutics, Université Libre de Bruxelles (ULB), Brussels, Belgium.,Institute for Medical Immunology (IMI), Université Libre de Bruxelles (ULB), Gosselies, Belgium.,ULB Center for Research in Immunology (U-CRI), Belgium
| | - Guillem Sanchez Sanchez
- Department of Pharmacotherapy and Pharmaceutics, Université Libre de Bruxelles (ULB), Brussels, Belgium.,Institute for Medical Immunology (IMI), Université Libre de Bruxelles (ULB), Gosselies, Belgium.,ULB Center for Research in Immunology (U-CRI), Belgium
| | - David Vermijlen
- Department of Pharmacotherapy and Pharmaceutics, Université Libre de Bruxelles (ULB), Brussels, Belgium.,Institute for Medical Immunology (IMI), Université Libre de Bruxelles (ULB), Gosselies, Belgium.,ULB Center for Research in Immunology (U-CRI), Belgium
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59
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Tieppo P, Papadopoulou M, Gatti D, McGovern N, Chan JKY, Gosselin F, Goetgeluk G, Weening K, Ma L, Dauby N, Cogan A, Donner C, Ginhoux F, Vandekerckhove B, Vermijlen D. The human fetal thymus generates invariant effector γδ T cells. J Exp Med 2020; 217:132616. [PMID: 31816633 PMCID: PMC7062527 DOI: 10.1084/jem.20190580] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 09/13/2019] [Accepted: 10/29/2019] [Indexed: 12/28/2022] Open
Abstract
Tieppo et al. show that the human fetal thymus generates invariant γδ T cells with programmed effector functions. This is due to an intrinsic property of fetal HSPCs caused by high expression of the RNA-binding protein Lin28b. In the mouse thymus, invariant γδ T cells are generated at well-defined times during development and acquire effector functions before exiting the thymus. However, whether such thymic programming and age-dependent generation of invariant γδ T cells occur in humans is not known. Here we found that, unlike postnatal γδ thymocytes, human fetal γδ thymocytes were functionally programmed (e.g., IFNγ, granzymes) and expressed low levels of terminal deoxynucleotidyl transferase (TdT). This low level of TdT resulted in a low number of N nucleotide insertions in the complementarity-determining region-3 (CDR3) of their TCR repertoire, allowing the usage of short homology repeats within the germline-encoded VDJ segments to generate invariant/public cytomegalovirus-reactive CDR3 sequences (TRGV8-TRJP1-CATWDTTGWFKIF, TRDV2-TRDD3-CACDTGGY, and TRDV1-TRDD3-CALGELGD). Furthermore, both the generation of invariant TCRs and the intrathymic acquisition of effector functions were due to an intrinsic property of fetal hematopoietic stem and precursor cells (HSPCs) caused by high expression of the RNA-binding protein Lin28b. In conclusion, our data indicate that the human fetal thymus generates, in an HSPC/Lin28b-dependent manner, invariant γδ T cells with programmed effector functions.
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Affiliation(s)
- Paola Tieppo
- Department of Pharmacotherapy and Pharmaceutics, Université Libre de Bruxelles (ULB), Bruxelles, Belgium.,Institute for Medical Immunology, Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Maria Papadopoulou
- Department of Pharmacotherapy and Pharmaceutics, Université Libre de Bruxelles (ULB), Bruxelles, Belgium.,Institute for Medical Immunology, Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Deborah Gatti
- Department of Pharmacotherapy and Pharmaceutics, Université Libre de Bruxelles (ULB), Bruxelles, Belgium.,Institute for Medical Immunology, Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Naomi McGovern
- Department of Pathology and Centre for Trophoblast Research, University of Cambridge, Cambridge, UK
| | - Jerry K Y Chan
- Department of Reproductive Medicine, KK Women's and Children's Hospital, Singapore.,Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,OBGYN-Academic Clinical Program, Duke-National University of Singapore, Duke-National University of Singapore Medical School, Singapore
| | - Françoise Gosselin
- Department of Obstetrics and Gynecology, Hôpital Erasme, Université Libre de Bruxelles (ULB), Bruxelles, Belgium
| | - Glenn Goetgeluk
- Department of Clinical Chemistry, Microbiology and Immunology, Ghent University, Ghent, Belgium
| | - Karin Weening
- Department of Clinical Chemistry, Microbiology and Immunology, Ghent University, Ghent, Belgium
| | - Ling Ma
- Department of Pharmacotherapy and Pharmaceutics, Université Libre de Bruxelles (ULB), Bruxelles, Belgium.,Institute for Medical Immunology, Université Libre de Bruxelles (ULB), Gosselies, Belgium
| | - Nicolas Dauby
- Institute for Medical Immunology, Université Libre de Bruxelles (ULB), Gosselies, Belgium.,Department of Infectious Diseases, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles (ULB), Bruxelles, Belgium
| | - Alexandra Cogan
- Department of Obstetrics and Gynecology, Centre Hospitalier Universitaire Saint-Pierre, Université Libre de Bruxelles (ULB), Bruxelles, Belgium
| | - Catherine Donner
- Department of Obstetrics and Gynecology, Hôpital Erasme, Université Libre de Bruxelles (ULB), Bruxelles, Belgium
| | - Florent Ginhoux
- Singapore Immunology Network, Agency for Science, Technology and Research, Singapore
| | - Bart Vandekerckhove
- Department of Clinical Chemistry, Microbiology and Immunology, Ghent University, Ghent, Belgium
| | - David Vermijlen
- Department of Pharmacotherapy and Pharmaceutics, Université Libre de Bruxelles (ULB), Bruxelles, Belgium.,Institute for Medical Immunology, Université Libre de Bruxelles (ULB), Gosselies, Belgium
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60
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Abstract
γδ T cells are a unique T cell subpopulation that are rare in secondary lymphoid organs but enriched in many peripheral tissues, such as the skin, intestines and lungs. By rapidly producing large amounts of cytokines, γδ T cells make key contributions to immune responses in these tissues. In addition to their immune surveillance activities, recent reports have unravelled exciting new roles for γδ T cells in steady-state tissue physiology, with functions ranging from the regulation of thermogenesis in adipose tissue to the control of neuronal synaptic plasticity in the central nervous system. Here, we review the roles of γδ T cells in tissue homeostasis and in surveillance of infection, aiming to illustrate their major impact on tissue integrity, tissue repair and immune protection.
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61
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Faustino LD, Griffith JW, Rahimi RA, Nepal K, Hamilos DL, Cho JL, Medoff BD, Moon JJ, Vignali DAA, Luster AD. Interleukin-33 activates regulatory T cells to suppress innate γδ T cell responses in the lung. Nat Immunol 2020; 21:1371-1383. [PMID: 32989331 PMCID: PMC7578082 DOI: 10.1038/s41590-020-0785-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Accepted: 08/13/2020] [Indexed: 12/20/2022]
Abstract
Foxp3+ regulatory T (Treg) cells expressing the interleukin (IL)-33 receptor ST2 mediate tissue repair in response to IL-33. Whether Treg cells also respond to the alarmin IL-33 to regulate specific aspects of the immune response is not known. Here we describe an unexpected function of ST2+ Treg cells in suppressing the innate immune response in the lung to environmental allergens without altering the adaptive immune response. Following allergen exposure, ST2+ Treg cells were activated by IL-33 to suppress IL-17-producing γδ T cells. ST2 signaling in Treg cells induced Ebi3, a component of the heterodimeric cytokine IL-35 that was required for Treg cell-mediated suppression of γδ T cells. This response resulted in fewer eosinophil-attracting chemokines and reduced eosinophil recruitment into the lung, which was beneficial to the host in reducing allergen-induced inflammation. Thus, we define a fundamental role for ST2+ Treg cells in the lung as a negative regulator of the early innate γδ T cell response to mucosal injury.
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Affiliation(s)
- Lucas D Faustino
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Jason W Griffith
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Rod A Rahimi
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Keshav Nepal
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Daniel L Hamilos
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Josalyn L Cho
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Benjamin D Medoff
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - James J Moon
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.,Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Dario A A Vignali
- Department of Immunology, University of Pittsburgh School of Medicine and Tumor Microenvironment Center, UPMC Hillman Cancer Center, Pittsburgh, PA, USA
| | - Andrew D Luster
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA.
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62
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Rioux M, McNeil M, Francis ME, Dawe N, Foley M, Langley JM, Kelvin AA. The Power of First Impressions: Can Influenza Imprinting during Infancy Inform Vaccine Design? Vaccines (Basel) 2020; 8:E546. [PMID: 32961707 PMCID: PMC7563765 DOI: 10.3390/vaccines8030546] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 09/16/2020] [Accepted: 09/17/2020] [Indexed: 12/15/2022] Open
Abstract
Influenza virus infection causes severe respiratory illness in people worldwide, disproportionately affecting infants. The immature respiratory tract coupled with the developing immune system, and lack of previous exposure to the virus is thought to synergistically play a role in the increased disease severity in younger age groups. No influenza vaccines are available for those under six months, although maternal influenza immunization is recommended. In children aged six months to two years, vaccine immunogenicity is dampened compared to older children and adults. Unlike older children and adults, the infant immune system has fewer antigen-presenting cells and soluble immune factors. Paradoxically, we know that a person's first infection with the influenza virus during infancy or childhood leads to the establishment of life-long immunity toward that particular virus strain. This is called influenza imprinting. We contend that by understanding the influenza imprinting event in the context of the infant immune system, we will be able to design more effective influenza vaccines for both infants and adults. Working through the lens of imprinting, using infant influenza animal models such as mice and ferrets which have proven useful for infant immunity studies, we will gain a better understanding of imprinting and its implications regarding vaccine design. This review examines literature regarding infant immune and respiratory development, current vaccine strategies, and highlights the importance of research into the imprinting event in infant animal models to develop more effective and protective vaccines for all including young children.
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Affiliation(s)
- Melissa Rioux
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS B3H 4R2, Canada; (M.R.); (M.M.); (M.E.F.); (N.D.); (M.F.)
| | - Mara McNeil
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS B3H 4R2, Canada; (M.R.); (M.M.); (M.E.F.); (N.D.); (M.F.)
| | - Magen E. Francis
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS B3H 4R2, Canada; (M.R.); (M.M.); (M.E.F.); (N.D.); (M.F.)
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), Saskatoon, SK S7N 5E3, Canada
| | - Nicholas Dawe
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS B3H 4R2, Canada; (M.R.); (M.M.); (M.E.F.); (N.D.); (M.F.)
| | - Mary Foley
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS B3H 4R2, Canada; (M.R.); (M.M.); (M.E.F.); (N.D.); (M.F.)
| | - Joanne M. Langley
- Department of Pediatrics, Division of Infectious Disease, Faculty of Medicine, Dalhousie University, Halifax, NS B3K 6R8, Canada;
- The Canadian Center for Vaccinology (IWK Health Centre, Dalhousie University and the Nova Scotia Health Authority), Halifax, NS B3K 6R8, Canada
- Department of Community Health and Epidemiology, Faculty of Medicine, Dalhousie University, Halifax, NS B3K 6R8, Canada
| | - Alyson A. Kelvin
- Department of Microbiology and Immunology, Faculty of Medicine, Dalhousie University, Halifax, NS B3H 4R2, Canada; (M.R.); (M.M.); (M.E.F.); (N.D.); (M.F.)
- Vaccine and Infectious Disease Organization-International Vaccine Centre (VIDO-InterVac), Saskatoon, SK S7N 5E3, Canada
- Department of Pediatrics, Division of Infectious Disease, Faculty of Medicine, Dalhousie University, Halifax, NS B3K 6R8, Canada;
- The Canadian Center for Vaccinology (IWK Health Centre, Dalhousie University and the Nova Scotia Health Authority), Halifax, NS B3K 6R8, Canada
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63
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COVID-19: Proposing a Ketone-Based Metabolic Therapy as a Treatment to Blunt the Cytokine Storm. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:6401341. [PMID: 33014275 PMCID: PMC7519203 DOI: 10.1155/2020/6401341] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 06/22/2020] [Accepted: 08/17/2020] [Indexed: 02/07/2023]
Abstract
Human SARS-CoV-2 infection is characterized by a high mortality rate due to some patients developing a large innate immune response associated with a cytokine storm and acute respiratory distress syndrome (ARDS). This is characterized at the molecular level by decreased energy metabolism, altered redox state, oxidative damage, and cell death. Therapies that increase levels of (R)-beta-hydroxybutyrate (R-BHB), such as the ketogenic diet or consuming exogenous ketones, should restore altered energy metabolism and redox state. R-BHB activates anti-inflammatory GPR109A signaling and inhibits the NLRP3 inflammasome and histone deacetylases, while a ketogenic diet has been shown to protect mice from influenza virus infection through a protective γδ T cell response and by increasing electron transport chain gene expression to restore energy metabolism. During a virus-induced cytokine storm, metabolic flexibility is compromised due to increased levels of reactive oxygen species (ROS) and reactive nitrogen species (RNS) that damage, downregulate, or inactivate many enzymes of central metabolism including the pyruvate dehydrogenase complex (PDC). This leads to an energy and redox crisis that decreases B and T cell proliferation and results in increased cytokine production and cell death. It is hypothesized that a moderately high-fat diet together with exogenous ketone supplementation at the first signs of respiratory distress will increase mitochondrial metabolism by bypassing the block at PDC. R-BHB-mediated restoration of nucleotide coenzyme ratios and redox state should decrease ROS and RNS to blunt the innate immune response and the associated cytokine storm, allowing the proliferation of cells responsible for adaptive immunity. Limitations of the proposed therapy include the following: it is unknown if human immune and lung cell functions are enhanced by ketosis, the risk of ketoacidosis must be assessed prior to initiating treatment, and permissive dietary fat and carbohydrate levels for exogenous ketones to boost immune function are not yet established. The third limitation could be addressed by studies with influenza-infected mice. A clinical study is warranted where COVID-19 patients consume a permissive diet combined with ketone ester to raise blood ketone levels to 1 to 2 mM with measured outcomes of symptom severity, length of infection, and case fatality rate.
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64
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Abstract
It has been over 100 years since the 1918 influenza pandemic, one of the most infamous examples of viral immunopathology. Since that time, there has been an inevitable repetition of influenza pandemics every few decades and yearly influenza seasons, which have a significant impact on human health. Recently, noteworthy progress has been made in defining the cellular and molecular mechanisms underlying pathology induced by an exuberant host response to influenza virus infection. Infection with influenza viruses is associated with a wide spectrum of disease, from mild symptoms to severe complications including respiratory failure, and the severity of influenza disease is driven by a complex interplay of viral and host factors. This chapter will discuss mechanisms of infection severity using concepts of disease resistance and tolerance as a framework for understanding the balance between viral clearance and immunopathology. We review mechanistic studies in animal models of infection and correlational studies in humans that have begun to define these factors and discuss promising host therapeutic targets to improve outcomes from severe influenza disease.
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Affiliation(s)
- David F Boyd
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, United States
| | - Taylor L Wilson
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, United States; Department of Microbiology, Immunology, and Biochemistry, College of Graduate Health Sciences, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Paul G Thomas
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN, United States; Department of Microbiology, Immunology, and Biochemistry, College of Graduate Health Sciences, University of Tennessee Health Science Center, Memphis, TN, United States.
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65
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Kamdar S, Hutchinson R, Laing A, Stacey F, Ansbro K, Millar MR, Costeloe K, Wade WG, Fleming P, Gibbons DL. Perinatal inflammation influences but does not arrest rapid immune development in preterm babies. Nat Commun 2020; 11:1284. [PMID: 32152273 PMCID: PMC7062833 DOI: 10.1038/s41467-020-14923-8] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 02/11/2020] [Indexed: 02/07/2023] Open
Abstract
Infection and infection-related complications are important causes of death and morbidity following preterm birth. Despite this risk, there is limited understanding of the development of the immune system in those born prematurely, and of how this development is influenced by perinatal factors. Here we prospectively and longitudinally follow a cohort of babies born before 32 weeks of gestation. We demonstrate that preterm babies, including those born extremely prematurely (<28 weeks), are capable of rapidly acquiring some adult levels of immune functionality, in which immune maturation occurs independently of the developing heterogeneous microbiome. By contrast, we observe a reduced percentage of CXCL8-producing T cells, but comparable levels of TNF-producing T cells, from babies exposed to in utero or postnatal infection, which precedes an unstable post-natal clinical course. These data show that rapid immune development is possible in preterm babies, but distinct identifiable differences in functionality may predict subsequent infection mediated outcomes.
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Affiliation(s)
- S Kamdar
- Peter Gorer Department of Immunobiology, King's College London, London, SE1 9RT, UK
| | - R Hutchinson
- Department of Neonatology, Homerton University Hospital, London, UK
- Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - A Laing
- Peter Gorer Department of Immunobiology, King's College London, London, SE1 9RT, UK
| | - F Stacey
- Department of Neonatology, Homerton University Hospital, London, UK
| | - K Ansbro
- Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
- University of Sheffield, Sheffield, UK
| | - M R Millar
- Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - K Costeloe
- Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - W G Wade
- Faculty of Dentistry, Oral and Craniofacial Sciences, Centre for Host-Microbiome Interactions, King's College London, London, UK
| | - P Fleming
- Department of Neonatology, Homerton University Hospital, London, UK
- Barts and the London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - D L Gibbons
- Peter Gorer Department of Immunobiology, King's College London, London, SE1 9RT, UK.
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66
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Spidale NA, Malhotra N, Frascoli M, Sylvia K, Miu B, Freeman C, Stadinski BD, Huseby E, Kang J. Neonatal-derived IL-17 producing dermal γδ T cells are required to prevent spontaneous atopic dermatitis. eLife 2020; 9:e51188. [PMID: 32065580 PMCID: PMC7025821 DOI: 10.7554/elife.51188] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 02/11/2020] [Indexed: 01/01/2023] Open
Abstract
Atopic Dermatitis (AD) is a T cell-mediated chronic skin disease and is associated with altered skin barrier integrity. Infants with mutations in genes involved in tissue barrier fitness are predisposed towards inflammatory diseases, but most do not develop or sustain the diseases, suggesting that there exist regulatory immune mechanisms to prevent aberrant inflammation. The absence of one single murine dermal cell type, the innate neonatal-derived IL-17 producing γδ T (Tγδ17) cells, from birth resulted in spontaneous, highly penetrant AD with many of the major hallmarks of human AD. In Tγδ17 cell-deficient mice, basal keratinocyte transcriptome was altered months in advance of AD induction. Tγδ17 cells respond to skin commensal bacteria and the fulminant disease in their absence was driven by skin commensal bacteria dysbiosis. AD in this model was characterized by highly expanded dermal αβ T clonotypes that produce the type three cytokines, IL-17 and IL-22. These results demonstrate that neonatal Tγδ17 cells are innate skin regulatory T cells that are critical for skin homeostasis, and that IL-17 has dual homeostatic and inflammatory function in the skin.
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MESH Headings
- Animals
- Animals, Newborn
- Autoantigens/genetics
- Cell Differentiation
- Dermatitis, Atopic/genetics
- Dermatitis, Atopic/immunology
- Dermatitis, Atopic/prevention & control
- Disease Models, Animal
- Gene Expression
- Interleukin-17/biosynthesis
- Interleukins/biosynthesis
- Keratinocytes/cytology
- Keratinocytes/metabolism
- Lymphocyte Activation
- Mice
- Mice, Knockout
- Receptors, Antigen, T-Cell, gamma-delta/immunology
- Receptors, Antigen, T-Cell, gamma-delta/metabolism
- Skin/metabolism
- Skin/microbiology
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- Interleukin-22
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Affiliation(s)
- Nicholas A Spidale
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Nidhi Malhotra
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Michela Frascoli
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Katelyn Sylvia
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Bing Miu
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Coral Freeman
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Brian D Stadinski
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Eric Huseby
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
| | - Joonsoo Kang
- Department of PathologyUniversity of Massachusetts Medical SchoolWorcesterUnited States
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67
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Hayday AC. γδ T Cell Update: Adaptate Orchestrators of Immune Surveillance. THE JOURNAL OF IMMUNOLOGY 2020; 203:311-320. [PMID: 31285310 DOI: 10.4049/jimmunol.1800934] [Citation(s) in RCA: 116] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 05/02/2019] [Indexed: 12/15/2022]
Abstract
As interest in γδ T cells grows rapidly, what key points are emerging, and where is caution warranted? γδ T cells fulfill critical functions, as reflected in associations with vaccine responsiveness and cancer survival in humans and ever more phenotypes of γδ T cell-deficient mice, including basic physiological deficiencies. Such phenotypes reflect activities of distinct γδ T cell subsets, whose origins offer interesting insights into lymphocyte development but whose variable evolutionary conservation can obfuscate translation of knowledge from mice to humans. By contrast, an emerging and conserved feature of γδ T cells is their "adaptate" biology: an integration of adaptive clonally-restricted specificities, innate tissue-sensing, and unconventional recall responses that collectively strengthen host resistance to myriad challenges. Central to adaptate biology are butyrophilins and other γδ cell regulators, the study of which should greatly enhance our understanding of tissue immunogenicity and immunosurveillance and guide intensifying clinical interest in γδ cells and other unconventional lymphocytes.
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Affiliation(s)
- Adrian C Hayday
- Peter Gorer Department of Immunobiology, King's College London, London SE1 9RT, United Kingdom; and Francis Crick Institute, London NW1 1AT, United Kingdom
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68
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LeMessurier KS, Tiwary M, Morin NP, Samarasinghe AE. Respiratory Barrier as a Safeguard and Regulator of Defense Against Influenza A Virus and Streptococcus pneumoniae. Front Immunol 2020; 11:3. [PMID: 32117216 PMCID: PMC7011736 DOI: 10.3389/fimmu.2020.00003] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 01/03/2020] [Indexed: 12/27/2022] Open
Abstract
The primary function of the respiratory system of gas exchange renders it vulnerable to environmental pathogens that circulate in the air. Physical and cellular barriers of the respiratory tract mucosal surface utilize a variety of strategies to obstruct microbe entry. Physical barrier defenses including the surface fluid replete with antimicrobials, neutralizing immunoglobulins, mucus, and the epithelial cell layer with rapidly beating cilia form a near impenetrable wall that separates the external environment from the internal soft tissue of the host. Resident leukocytes, primarily of the innate immune branch, also maintain airway integrity by constant surveillance and the maintenance of homeostasis through the release of cytokines and growth factors. Unfortunately, pathogens such as influenza virus and Streptococcus pneumoniae require hosts for their replication and dissemination, and prey on the respiratory tract as an ideal environment causing severe damage to the host during their invasion. In this review, we outline the host-pathogen interactions during influenza and post-influenza bacterial pneumonia with a focus on inter- and intra-cellular crosstalk important in pulmonary immune responses.
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Affiliation(s)
- Kim S LeMessurier
- Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Division of Pulmonology, Allergy-Immunology, and Sleep, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Le Bonheur Children's Hospital, Children's Foundation Research Institute, Memphis, TN, United States
| | - Meenakshi Tiwary
- Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Division of Pulmonology, Allergy-Immunology, and Sleep, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Le Bonheur Children's Hospital, Children's Foundation Research Institute, Memphis, TN, United States
| | - Nicholas P Morin
- Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Division of Critical Care Medicine, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Amali E Samarasinghe
- Department of Pediatrics, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Division of Pulmonology, Allergy-Immunology, and Sleep, College of Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Le Bonheur Children's Hospital, Children's Foundation Research Institute, Memphis, TN, United States
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69
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Goldberg EL, Shchukina I, Asher JL, Sidorov S, Artyomov MN, Dixit VD. Ketogenesis activates metabolically protective γδ T cells in visceral adipose tissue. Nat Metab 2020; 2:50-61. [PMID: 32694683 PMCID: PMC10150608 DOI: 10.1038/s42255-019-0160-6] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 12/11/2019] [Indexed: 12/29/2022]
Abstract
Ketone bodies are essential alternative fuels that allow humans to survive periods of glucose scarcity induced by starvation and prolonged exercise. A widely used ketogenic diet (KD), which is extremely high in fat with very low carbohydrates, drives the host into using β-hydroxybutyrate for the production of ATP and lowers NLRP3-mediated inflammation. However, the extremely high fat composition of KD raises the question of how ketogenesis affects adipose tissue to control inflammation and energy homeostasis. Here, by using single-cell RNA sequencing of adipose-tissue-resident immune cells, we show that KD expands metabolically protective γδ T cells that restrain inflammation. Notably, long-term ad libitum KD feeding in mice causes obesity, impairs metabolic health and depletes the adipose-resident γδ T cells. In addition, mice lacking γδ T cells have impaired glucose homeostasis. Our results suggest that γδ T cells are mediators of protective immunometabolic responses that link fatty acid-driven fuel use to reduced adipose tissue inflammation.
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Affiliation(s)
- Emily L Goldberg
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT, USA
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA
| | - Irina Shchukina
- Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO, USA
| | - Jennifer L Asher
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Sviatoslav Sidorov
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT, USA
| | - Maxim N Artyomov
- Department of Pathology and Immunology, Washington University School of Medicine, St Louis, MO, USA
| | - Vishwa Deep Dixit
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT, USA.
- Department of Immunobiology, Yale School of Medicine, New Haven, CT, USA.
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70
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D'Souza SS, Shen X, Fung ITH, Ye L, Kuentzel M, Chittur SV, Furuya Y, Siebel CW, Maillard IP, Metzger DW, Yang Q. Compartmentalized effects of aging on group 2 innate lymphoid cell development and function. Aging Cell 2019; 18:e13019. [PMID: 31429526 PMCID: PMC6826140 DOI: 10.1111/acel.13019] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 06/20/2019] [Accepted: 07/14/2019] [Indexed: 01/03/2023] Open
Abstract
The effects of aging on innate immunity and the resulting impacts on immunosenescence remain poorly understood. Here, we report that aging induces compartmentalized changes to the development and function of group 2 innate lymphoid cells (ILC2), an ILC subset implicated in pulmonary homeostasis and tissue repair. Aging enhances bone marrow early ILC2 development through Notch signaling, but the newly generated circulating ILC2 are unable to settle in the lungs to replenish the concomitantly declining mature lung ILC2 pool in aged mice. Aged lung ILC2 are transcriptomically heterogeneous and functionally compromised, failing to produce cytokines at homeostasis and during influenza infection. They have reduced expression of Cyp2e1, a cytochrome P450 oxidase required for optimal ILC2 function. Transfer of lung ILC2 from young mice enhances resistance to influenza infection in old mice. These data highlight compartmentalized effects of aging on ILC and indicate that targeting tissue-resident ILCs might unlock therapies to enhance resistance to infections and diseases in the elderly.
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Affiliation(s)
- Shanti S. D'Souza
- Department of Immunology and Microbial Disease Albany Medical College Albany New York USA
| | - Xiaofei Shen
- Department of Immunology and Microbial Disease Albany Medical College Albany New York USA
| | - Ivan T. H. Fung
- Department of Immunology and Microbial Disease Albany Medical College Albany New York USA
| | - Longyun Ye
- Department of Immunology and Microbial Disease Albany Medical College Albany New York USA
| | - Marcy Kuentzel
- Center for Functional Genomics University at Albany‐SUNY Rensselaer New York USA
| | - Sridar V. Chittur
- Center for Functional Genomics University at Albany‐SUNY Rensselaer New York USA
| | - Yoichi Furuya
- Department of Immunology and Microbial Disease Albany Medical College Albany New York USA
| | - Christian W. Siebel
- Department of Discovery Oncology Genentech South San Francisco California USA
| | - Ivan P. Maillard
- Division of Hematology‐Oncology, Department of Medicine & Abramson Family Cancer Research Institute University of Pennsylvania Perelman School of Medicine Philadelphia Pennsylvania USA
| | - Dennis W. Metzger
- Department of Immunology and Microbial Disease Albany Medical College Albany New York USA
| | - Qi Yang
- Department of Immunology and Microbial Disease Albany Medical College Albany New York USA
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71
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Goldberg EL, Molony RD, Kudo E, Sidorov S, Kong Y, Dixit VD, Iwasaki A. Ketogenic diet activates protective γδ T cell responses against influenza virus infection. Sci Immunol 2019; 4:eaav2026. [PMID: 31732517 PMCID: PMC7189564 DOI: 10.1126/sciimmunol.aav2026] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 08/26/2019] [Accepted: 10/01/2019] [Indexed: 12/12/2022]
Abstract
Influenza A virus (IAV) infection-associated morbidity and mortality are a key global health care concern, necessitating the identification of new therapies capable of reducing the severity of IAV infections. In this study, we show that the consumption of a low-carbohydrate, high-fat ketogenic diet (KD) protects mice from lethal IAV infection and disease. KD feeding resulted in an expansion of γδ T cells in the lung that improved barrier functions, thereby enhancing antiviral resistance. Expansion of these protective γδ T cells required metabolic adaptation to a ketogenic diet because neither feeding mice a high-fat, high-carbohydrate diet nor providing chemical ketone body substrate that bypasses hepatic ketogenesis protected against infection. Therefore, KD-mediated immune-metabolic integration represents a viable avenue toward preventing or alleviating influenza disease.
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Affiliation(s)
- Emily L Goldberg
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT 06519, USA
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06519, USA
| | - Ryan D Molony
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06519, USA
- Novartis Institutes for BioMedical Research, 250 Massachusetts Ave, Cambridge, MA 02139, USA
| | - Eriko Kudo
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06519, USA
| | - Sviatoslav Sidorov
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT 06519, USA
| | - Yong Kong
- Department of Molecular Biophysics and Biochemistry, W.M. Keck Foundation Biotechnology Resource Laboratory, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Vishwa Deep Dixit
- Department of Comparative Medicine, Yale School of Medicine, New Haven, CT 06519, USA.
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06519, USA
- Yale Center for Research on Aging, Yale School of Medicine, New Haven, CT 06519, USA
| | - Akiko Iwasaki
- Department of Immunobiology, Yale School of Medicine, New Haven, CT 06519, USA.
- Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA
- Department of Molecular Cellular and Developmental Biology, Yale University, New Haven, CT, 06511, USA
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72
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The Role of Innate Leukocytes during Influenza Virus Infection. J Immunol Res 2019; 2019:8028725. [PMID: 31612153 PMCID: PMC6757286 DOI: 10.1155/2019/8028725] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 07/15/2019] [Indexed: 02/07/2023] Open
Abstract
Influenza virus infection is a serious threat to humans and animals, with the potential to cause severe pneumonia and death. Annual vaccination strategies are a mainstay to prevent complications related to influenza. However, protection from the emerging subtypes of influenza A viruses (IAV) even in vaccinated individuals is challenging. Innate immune cells are the first cells to respond to IAV infection in the respiratory tract. Virus replication-induced production of cytokines from airway epithelium recruits innate immune cells to the site of infection. These leukocytes, namely, neutrophils, monocytes, macrophages, dendritic cells, eosinophils, natural killer cells, innate lymphoid cells, and γδ T cells, become activated in response to IAV, to contain the virus and protect the airway epithelium while triggering the adaptive arm of the immune system. This review addresses different anti-influenza virus schemes of innate immune cells and how these cells fine-tune the balance between immunoprotection and immunopathology during IAV infection. Detailed understanding on how these innate responders execute anti-influenza activity will help to identify novel therapeutic targets to halt IAV replication and associated immunopathology.
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73
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Johansson K, McSorley HJ. Interleukin-33 in the developing lung-Roles in asthma and infection. Pediatr Allergy Immunol 2019; 30:503-510. [PMID: 30734382 DOI: 10.1111/pai.13040] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/06/2019] [Accepted: 01/08/2019] [Indexed: 02/07/2023]
Abstract
It has become increasingly clear that interleukin-33 (IL-33) plays a crucial role in initiation of type 2 immunity. The last decade of intense research has uncovered multiple mechanisms through which IL-33 targets key effector cells of the allergic immune response. Recently, IL-33 has been implicated in shaping the immune system of the lungs early in life, at a time which is crucial in the subsequent development of allergic asthma. In this review, we will address the current literature describing the role of IL-33 in the healthy and diseased lung. In particular, we will focus on the evidence for IL-33 in the development of immune responses in the lung, including the role of IL-33-responsive immune cells that may explain susceptibility to allergic sensitization at a young age and the association between genetic variants of IL-33 and asthma in humans. Finally, we will indicate areas for potential therapeutic modulation of the IL-33 pathway.
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Affiliation(s)
- Kristina Johansson
- Department of Microbiology and Immunology, Sandler Asthma Basic Research Center, University of California, San Francisco, California.,Department of Medicine, University of California, San Francisco, California
| | - Henry J McSorley
- Centre for Inflammation Research, University of Edinburgh, Edinburgh, UK
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74
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Ma WT, Yao XT, Peng Q, Chen DK. The protective and pathogenic roles of IL-17 in viral infections: friend or foe? Open Biol 2019; 9:190109. [PMID: 31337278 PMCID: PMC6685926 DOI: 10.1098/rsob.190109] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Viral infections cause substantial human morbidity and mortality, and are a significant health burden worldwide. Following a viral infection, the host may initiate complex antiviral immune responses to antagonize viral invasion and replication. However, proinflammatory antiviral immune responses pose a great threat to the host if not properly held in check. Interleukin (IL)-17 is a pleiotropic cytokine participating in a variety of physiological and pathophysiological conditions, including tissue integrity maintenance, cancer progression, autoimmune disease development and, more intriguingly, infectious diseases. Abundant evidence suggests that while IL-17 plays a crucial role in enhancing effective antiviral immune responses, it may also promote and exacerbate virus-induced illnesses. Accumulated experimental and clinical evidence has broadened our understanding of the seemingly paradoxical role of IL-17 in viral infections and suggests that IL-17-targeted immunotherapy may be a promising therapeutic option. Herein, we summarize current knowledge regarding the protective and pathogenic roles of IL-17 in viral infections, with emphasis on underlying mechanisms. The various and critical roles of IL-17 in viral infections necessitate the development of therapeutic strategies that are uniquely tailored to both the infectious agent and the infection environment.
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Affiliation(s)
- Wen-Tao Ma
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi Province, People's Republic of China
| | - Xiao-Ting Yao
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi Province, People's Republic of China
| | - Qun Peng
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi Province, People's Republic of China
| | - De-Kun Chen
- College of Veterinary Medicine, Northwest A&F University, Yangling 712100, Shaanxi Province, People's Republic of China
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75
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Borger JG, Lau M, Hibbs ML. The Influence of Innate Lymphoid Cells and Unconventional T Cells in Chronic Inflammatory Lung Disease. Front Immunol 2019; 10:1597. [PMID: 31354734 PMCID: PMC6637857 DOI: 10.3389/fimmu.2019.01597] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 06/26/2019] [Indexed: 12/11/2022] Open
Abstract
The lungs are continuously subjected to environmental insults making them susceptible to infection and injury. They are protected by the respiratory epithelium, which not only serves as a physical barrier but also a reactive one that can release cytokines, chemokines, and other defense proteins in response to danger signals, and can undergo conversion to protective mucus-producing goblet cells. The lungs are also guarded by a complex network of highly specialized immune cells and their mediators to support tissue homeostasis and resolve integrity deviation. This review focuses on specialized innate-like lymphocytes present in the lung that act as key sensors of lung insults and direct the pulmonary immune response. Included amongst these tissue-resident lymphocytes are innate lymphoid cells (ILCs), which are classified into five distinct subsets (natural killer, ILC1, ILC2, ILC3, lymphoid tissue-inducer cells), and unconventional T cells including natural killer T (NKT) cells, mucosal-associated invariant T (MAIT) cells, and γδ-T cells. While ILCs and unconventional T cells together comprise only a small proportion of the total immune cells in the lung, they have been found to promote lung homeostasis and are emerging as contributors to a variety of chronic lung diseases including pulmonary fibrosis, allergic airway inflammation, and chronic obstructive pulmonary disease (COPD). A particularly intriguing trait of ILCs that has recently emerged is their plasticity and ability to alter their gene expression profiles and adapt their function in response to environmental cues. The malleable nature of these cells may aid in rapid responses to pathogen but may also have downstream pathological consequences. The role of ILC2s in Th2 allergic airway responses is becoming apparent but the contribution of other ILCs and unconventional T cells during chronic lung inflammation is poorly described. This review presents an overview of our current understanding of the involvement of ILCs and unconventional T cells in chronic pulmonary diseases.
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Affiliation(s)
- Jessica G Borger
- Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Maverick Lau
- Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, VIC, Australia.,Department of Pharmacology and Therapeutics, Lung Health Research Centre, University of Melbourne, Melbourne, VIC, Australia
| | - Margaret L Hibbs
- Department of Immunology and Pathology, Central Clinical School, Monash University, Melbourne, VIC, Australia
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76
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Tan L, Sandrock I, Odak I, Aizenbud Y, Wilharm A, Barros-Martins J, Tabib Y, Borchers A, Amado T, Gangoda L, Herold MJ, Schmidt-Supprian M, Kisielow J, Silva-Santos B, Koenecke C, Hovav AH, Krebs C, Prinz I, Ravens S. Single-Cell Transcriptomics Identifies the Adaptation of Scart1+ Vγ6+ T Cells to Skin Residency as Activated Effector Cells. Cell Rep 2019; 27:3657-3671.e4. [DOI: 10.1016/j.celrep.2019.05.064] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 03/22/2019] [Accepted: 05/17/2019] [Indexed: 01/05/2023] Open
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77
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Zaiss DM, Minutti CM, Knipper JA. Immune- and non-immune-mediated roles of regulatory T-cells during wound healing. Immunology 2019; 157:190-197. [PMID: 30866049 DOI: 10.1111/imm.13057] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2019] [Accepted: 01/29/2019] [Indexed: 12/16/2022] Open
Abstract
The immune system has a well-established contribution to tissue homeostasis and wound healing. However, in many cases immune responses themselves can cause severe tissue damage. Thus, the question arose to which extent cells of the immune system directly contribute to the process of wound healing and to which extent the resolution of excessive immune responses may indirectly contribute to wound healing. FoxP3-expressing CD4 T-cells, so-called regulatory T-cells (Tregs ), have an important contribution in the regulation of immune responses; and, in recent years, it has been suggested that Tregs next to an immune-regulatory, 'damage-limiting' function may also have an immune-independent 'damage-resolving' direct role in wound healing. In particular, the release of the epidermal growth factor-like growth factor Amphiregulin by tissue-resident Tregs during wound repair suggested such a function. Our recent findings have now revealed that Amphiregulin induces the local release of bio-active transforming growth factor (TGF)β, a cytokine involved both in immune regulation as well as in the process of wound repair. In light of these findings, we discuss whether, by locally activating TGFβ, Treg -derived Amphiregulin may contribute to both wound repair and immune suppression. Furthermore, we propose that Treg -derived Amphiregulin in an autocrine way may enable an IL-33-mediated survival and expansion of tissue-resident Tregs upon injury. Furthermore, Treg -derived Amphiregulin may contribute to a constitutive, low-level release of bio-active TGFβ within tissues, leading to continuous tissue regeneration and to an immune-suppressive environment, which may keep inflammation-prone tissues in an homeostatic state.
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Affiliation(s)
- Dietmar M Zaiss
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
| | - Carlos M Minutti
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK.,Immunobiology Laboratory, The Francis Crick Institute, London, UK
| | - Johanna A Knipper
- Institute of Immunology and Infection Research, University of Edinburgh, Edinburgh, UK
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78
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Abstract
T cells are central to the vertebrate immune system. Two distinct types of T cells, αβT and γδT cells, express different types of T cell antigen receptors (TCRs), αβTCR and γδTCR, respectively, that are composed of different sets of somatically rearranged TCR chains and CD3 subunits. γδT cells have recently attracted considerable attention due to their ability to produce abundant cytokines and versatile roles in host defense, tissue regeneration, inflammation, and autoimmune diseases. Both αβT and γδT cells develop in the thymus. Unlike the development of αβT cells, which depends on αβTCR-mediated positive and negative selection, the development of γδT cells, including the requirement of γδTCR, has been less well understood. αβT cells differentiate into effector cells in the peripheral tissues, whereas γδT cells acquire effector functions during their development in the thymus. In this review, we will discuss the current state of knowledge of the molecular mechanism of TCR signal transduction and its role in the thymic development of γδT cells, particularly highlighting a newly discovered mechanism that controls proinflammatory γδT cell development.
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79
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Iwanaga N, Kolls JK. Updates on T helper type 17 immunity in respiratory disease. Immunology 2018; 156:3-8. [PMID: 30260473 DOI: 10.1111/imm.13006] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 09/20/2018] [Accepted: 09/21/2018] [Indexed: 12/12/2022] Open
Abstract
Interleukin-17 (IL-17)-producing cells play a critical role in mucosal immunity including the respiratory tract. This review will highlight recent advances in our understanding of these cells in mucosal immunity in the lung as well as their potential pathogenic roles in respiratory diseases. The IL-17-producing cells include γδ T cells, natural killer cells, group 3 innate lymphoid cells, and T helper type 17 (Th17) cells. There have been recent advances in our understanding of these cell populations in the lung as well as emerging data on how these cells are regulated in the lung. Moreover, Th17 cells may be a key component of tissue-resident memory cells that may be acquired over time or elicited by mucosal immunization that provides the host with enhanced immunity against certain pathogens.
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Affiliation(s)
- Naoki Iwanaga
- Center for Translational Research in Infection and Inflammation, Tulane University School of Medicine, New Orleans, LA, USA
| | - Jay K Kolls
- Center for Translational Research in Infection and Inflammation, Tulane University School of Medicine, New Orleans, LA, USA
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