101
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Huang S, Moody DB. Donor-unrestricted T cells in the human CD1 system. Immunogenetics 2016; 68:577-96. [PMID: 27502318 PMCID: PMC5915868 DOI: 10.1007/s00251-016-0942-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Accepted: 07/14/2016] [Indexed: 02/06/2023]
Abstract
The CD1 and MHC systems are specialized for lipid and peptide display, respectively. Here, we review evidence showing how cellular CD1a, CD1b, CD1c, and CD1d proteins capture and display many cellular lipids to T cell receptors (TCRs). Increasing evidence shows that CD1-reactive T cells operate outside two classical immunogenetic concepts derived from the MHC paradigm. First, because CD1 proteins are non-polymorphic in human populations, T cell responses are not restricted to the donor's genetic background. Second, the simplified population genetics of CD1 antigen-presenting molecules can lead to simplified patterns of TCR usage. As contrasted with donor-restricted patterns of MHC-TCR interaction, the donor-unrestricted nature of CD1-TCR interactions raises the prospect that lipid agonists and antagonists of T cells could be developed.
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Affiliation(s)
- Shouxiong Huang
- Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, 45267, USA.
| | - D Branch Moody
- Divison of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
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102
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Bagchi S, Li S, Wang CR. CD1b-autoreactive T cells recognize phospholipid antigens and contribute to antitumor immunity against a CD1b + T cell lymphoma. Oncoimmunology 2016; 5:e1213932. [PMID: 27757307 DOI: 10.1080/2162402x.2016.1213932] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2016] [Revised: 07/08/2016] [Accepted: 07/11/2016] [Indexed: 12/21/2022] Open
Abstract
Adoptive immunotherapy for cancer treatment is an emerging field of study. Till now, several tumor-derived, peptide-specific T cell responses have been harnessed for treating cancers. However, the contribution of lipid-specific T cells in tumor immunity has been understudied. CD1 molecules, which present self- and foreign lipid antigens to T cells, are divided into group 1 (CD1a, CD1b, and CD1c) and group 2 (CD1d). Although the role of CD1d-restricted natural killer T cells (NKT) in several tumor models has been well established, the contribution of group 1 CD1-restricted T cells in tumor immunity remains obscure due to the lack of group 1 CD1 expression in mice. In this study, we used a double transgenic mouse model expressing human group 1 CD1 molecules (hCD1Tg) and a CD1b-restricted, self-lipid reactive T cell receptor (HJ1Tg) to study the potential role of group 1 CD1-restricted autoreactive T cells in antitumor response. We found that HJ1 T cells recognized phospholipids and responded more potently to lipid extracted from tumor cells than the equivalent amount of lipids extracted from normal cells. Additionally, the autoreactivity of HJ1 T cells was enhanced upon treatment with various intracellular toll-like receptor (TLR) agonists, including CpG oligodeoxynucleotides (ODN), R848, and poly (I:C). Interestingly, the adoptive transfer of HJ1 T cells conferred protection against the CD1b-transfected murine T cell lymphoma (RMA-S/CD1b) and CpG ODN enhanced the antitumor effect. Thus, this study, for the first time, demonstrates the antitumor potential of CD1b-autoreactive T cells and their potential use in adoptive immunotherapy.
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Affiliation(s)
- Sreya Bagchi
- Department of Microbiology and Immunology, Northwestern University , Chicago, IL, USA
| | - Sha Li
- Department of Microbiology and Immunology, Northwestern University, Chicago, IL, USA; Department of Microbiology, Cornell University, Ithaca, NY, USA
| | - Chyung-Ru Wang
- Department of Microbiology and Immunology, Northwestern University , Chicago, IL, USA
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103
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Krovi SH, Gapin L. It is time to beelieve the CD1a hype! Eur J Immunol 2016; 46:56-9. [PMID: 26617406 DOI: 10.1002/eji.201546157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Revised: 11/12/2015] [Accepted: 11/25/2015] [Indexed: 11/07/2022]
Abstract
Conventional T cells have historically been linked to exacerbating allergy. By efficiently generating primarily TH 2 cells, allergens skew the immune response to produce IL-4, IL-13, and IgE. Previously, CD1a-responsive T cells were shown to functionally respond to bee and wasp venom allergens. In this issue of the European Journal of Immunology, Subramaniam et al. [Eur. J. Immunol. 2016. 46: 242-252] show that more functionally active CD1a-restricted cells are present in bee venom-allergic patients than in healthy patients. Additionally, the authors show that these cells are not as frequently found in individuals receiving venom immunotherapy. Consequently, this study implicates CD1a-reactive cells as the primary responders to venom allergy, which considerably regulate the downstream immune response.
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Affiliation(s)
- Sai Harsha Krovi
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical, Campus, Aurora, CO, USA
| | - Laurent Gapin
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical, Campus, Aurora, CO, USA
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104
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Gimeno Brias S, Stack G, Stacey MA, Redwood AJ, Humphreys IR. The Role of IL-22 in Viral Infections: Paradigms and Paradoxes. Front Immunol 2016; 7:211. [PMID: 27303405 PMCID: PMC4885595 DOI: 10.3389/fimmu.2016.00211] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Accepted: 05/17/2016] [Indexed: 12/12/2022] Open
Abstract
Interleukin-22 (IL-22) is a member of the IL-10 family of cytokines. Hematopoietic cells express IL-22, and this cytokine signals through the heterodimeric IL-22 receptor expressed by non-hematopoietic cells. A growing body of evidence points toward a role for IL-22 in a diverse array of biological functions ranging from cellular proliferation, tissue protection and regeneration, and inflammation. In recent years, the role that IL-22 plays in antiviral immune responses has been examined in a number of infection models. Herein, we assess our current understanding of how IL-22 determines the outcome of viral infections and define common mechanisms that are evident from, sometimes paradoxical, findings derived from these studies. Finally, we discuss the potential therapeutic utility of IL-22 manipulation in the treatment and prevention of viral infections and associated pathologies.
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Affiliation(s)
- Silvia Gimeno Brias
- Institute of Infection and Immunity, Cardiff University, Cardiff, UK; Systems Immunity University Research Institute, Cardiff University, Cardiff, UK
| | - Gabrielle Stack
- Institute of Infection and Immunity, Cardiff University, Cardiff, UK; Systems Immunity University Research Institute, Cardiff University, Cardiff, UK
| | - Maria A Stacey
- Institute of Infection and Immunity, Cardiff University, Cardiff, UK; Systems Immunity University Research Institute, Cardiff University, Cardiff, UK
| | - Alec J Redwood
- The Institute for Immunology and Infectious Diseases, Murdoch University , Murdoch, WA , Australia
| | - Ian R Humphreys
- Institute of Infection and Immunity, Cardiff University, Cardiff, UK; Systems Immunity University Research Institute, Cardiff University, Cardiff, UK
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105
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Abstract
CD1- and MHC-related molecule-1 (MR1)-restricted T lymphocytes recognize nonpeptidic antigens, such as lipids and small metabolites, and account for a major fraction of circulating and tissue-resident T cells. They represent a readily activated, long-lasting population of effector cells and contribute to the early phases of immune response, orchestrating the function of other cells. This review addresses the main aspects of their immunological functions, including antigen and T cell receptor repertoires, mechanisms of nonpeptidic antigen presentation, and the current evidence for their participation in human and experimental diseases.
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Affiliation(s)
- Lucia Mori
- Department of Biomedicine, Basel University Hospital and Basel University, CH-4031 Basel, Switzerland; , , .,Singapore Immunology Network, A*STAR, 138648 Singapore
| | - Marco Lepore
- Department of Biomedicine, Basel University Hospital and Basel University, CH-4031 Basel, Switzerland; , ,
| | - Gennaro De Libero
- Department of Biomedicine, Basel University Hospital and Basel University, CH-4031 Basel, Switzerland; , , .,Singapore Immunology Network, A*STAR, 138648 Singapore
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106
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NEAGU MONICA, CARUNTU CONSTANTIN, CONSTANTIN CAROLINA, BODA DANIEL, ZURAC SABINA, SPANDIDOS DEMETRIOSA, TSATSAKIS ARISTIDISM. Chemically induced skin carcinogenesis: Updates in experimental models (Review). Oncol Rep 2016; 35:2516-28. [PMID: 26986013 PMCID: PMC4811393 DOI: 10.3892/or.2016.4683] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 03/16/2016] [Indexed: 02/06/2023] Open
Abstract
Skin cancer is one of the most common malignancies affecting humans worldwide, and its incidence is rapidly increasing. The study of skin carcinogenesis is of major interest for both scientific research and clinical practice and the use of in vivo systems may facilitate the investigation of early alterations in the skin and of the mechanisms involved, and may also lead to the development of novel therapeutic strategies for skin cancer. This review outlines several aspects regarding the skin toxicity testing domain in mouse models of chemically induced skin carcinogenesis. There are important strain differences in view of the histological type, development and clinical evolution of the skin tumor, differences reported decades ago and confirmed by our hands‑on experience. Using mouse models in preclinical testing is important due to the fact that, at the molecular level, common mechanisms with human cutaneous tumorigenesis are depicted. These animal models resemble human skin cancer development, in that genetic changes caused by carcinogens and pro‑inflammatory cytokines, and simultaneous inflammation sustained by pro‑inflammatory cytokines and chemokines favor tumor progression. Drugs and environmental conditions can be tested using these animal models. keeping in mind the differences between human and rodent skin physiology.
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Affiliation(s)
- MONICA NEAGU
- 'Victor Babes' National Institute of Pathology, Bucharest 050096, Romania
- Faculty of Biology, University of Bucharest, Bucharest 76201, Romania
| | - CONSTANTIN CARUNTU
- Department of Physiology, 'Carol Davila' University of Medicine and Pharmacy, Bucharest 050474, Romania
- Department of Dermatology, 'Prof. N. Paulescu' National Institute of Diabetes, Nutrition and Metabolic Diseases, Bucharest 79811, Romania
| | | | - DANIEL BODA
- Department of Dermatology, 'Prof. N. Paulescu' National Institute of Diabetes, Nutrition and Metabolic Diseases, Bucharest 79811, Romania
| | - SABINA ZURAC
- Department of Pathology, 'Colentina' Clinical Hospital, Bucharest 72202, Romania
| | - DEMETRIOS A. SPANDIDOS
- Laboratory of Clinical Virology, Medical School, University of Crete, Heraklion 71409, Greece
| | - ARISTIDIS M. TSATSAKIS
- Department of Forensic Sciences and Toxicology, Medical School, University of Crete, Heraklion 71003, Greece
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107
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Godfrey DI, Uldrich AP, McCluskey J, Rossjohn J, Moody DB. The burgeoning family of unconventional T cells. Nat Immunol 2016; 16:1114-23. [PMID: 26482978 DOI: 10.1038/ni.3298] [Citation(s) in RCA: 540] [Impact Index Per Article: 67.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 09/15/2015] [Indexed: 02/07/2023]
Abstract
While most studies of T lymphocytes have focused on T cells reactive to complexes of peptide and major histocompatibility complex (MHC) proteins, many other types of T cells do not fit this paradigm. These include CD1-restricted T cells, MR1-restricted mucosal associated invariant T cells (MAIT cells), MHC class Ib-reactive T cells, and γδ T cells. Collectively, these T cells are considered 'unconventional', in part because they can recognize lipids, small-molecule metabolites and specially modified peptides. Unlike MHC-reactive T cells, these apparently disparate T cell types generally show simplified patterns of T cell antigen receptor (TCR) expression, rapid effector responses and 'public' antigen specificities. Here we review evidence showing that unconventional T cells are an abundant component of the human immune system and discuss the immunotherapeutic potential of these cells and their antigenic targets.
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Affiliation(s)
- Dale I Godfrey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Parkville, Australia
| | - Adam P Uldrich
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Parkville, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program and The Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Australia.,Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff, UK.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Australia
| | - D Branch Moody
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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108
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Mansour S, Tocheva AS, Cave-Ayland C, Machelett MM, Sander B, Lissin NM, Molloy PE, Baird MS, Stübs G, Schröder NWJ, Schumann RR, Rademann J, Postle AD, Jakobsen BK, Marshall BG, Gosain R, Elkington PT, Elliott T, Skylaris CK, Essex JW, Tews I, Gadola SD. Cholesteryl esters stabilize human CD1c conformations for recognition by self-reactive T cells. Proc Natl Acad Sci U S A 2016; 113:E1266-75. [PMID: 26884207 PMCID: PMC4780616 DOI: 10.1073/pnas.1519246113] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Cluster of differentiation 1c (CD1c)-dependent self-reactive T cells are abundant in human blood, but self-antigens presented by CD1c to the T-cell receptors of these cells are poorly understood. Here we present a crystal structure of CD1c determined at 2.4 Å revealing an extended ligand binding potential of the antigen groove and a substantially different conformation compared with known CD1c structures. Computational simulations exploring different occupancy states of the groove reenacted these different CD1c conformations and suggested cholesteryl esters (CE) and acylated steryl glycosides (ASG) as new ligand classes for CD1c. Confirming this, we show that binding of CE and ASG to CD1c enables the binding of human CD1c self-reactive T-cell receptors. Hence, human CD1c adopts different conformations dependent on ligand occupancy of its groove, with CE and ASG stabilizing CD1c conformations that provide a footprint for binding of CD1c self-reactive T-cell receptors.
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Affiliation(s)
- Salah Mansour
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO17 1BJ, United Kingdom; Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom;
| | - Anna S Tocheva
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Chris Cave-Ayland
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Moritz M Machelett
- Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom; Centre for Biological Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Barbara Sander
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | | | - Peter E Molloy
- Immunocore Limited, Abingdon, Oxon OX14 4RY, United Kingdom
| | - Mark S Baird
- School of Chemistry, Bangor University, Bangor, Gwynedd LL57 2DG, United Kingdom
| | - Gunthard Stübs
- Institute for Community Medicine, University Medicine Greifswald, 17489 Greifswald, Germany
| | - Nicolas W J Schröder
- Institute for Pathology, Otto-von-Guericke University Magdeburg, 39106 Magdeburg, Germany
| | - Ralf R Schumann
- Institute for Microbiology and Hygiene, Charité University Medical Center, 10117 Berlin, Germany
| | - Jörg Rademann
- Division of Medicinal Chemistry, Institute of Pharmacy, Freie Universität Berlin, 14195 Berlin, Germany
| | - Anthony D Postle
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | | | - Ben G Marshall
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO17 1BJ, United Kingdom; Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Rajendra Gosain
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Paul T Elkington
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO17 1BJ, United Kingdom; Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Tim Elliott
- Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom; Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Chris-Kriton Skylaris
- Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom; School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Jonathan W Essex
- Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom; School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Ivo Tews
- Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom; Centre for Biological Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Stephan D Gadola
- Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton SO17 1BJ, United Kingdom; Institute for Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom; Novartis Institutes of Biomedical Research, 4058 Basel, Switzerland
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109
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Jarrett R, Salio M, Lloyd-Lavery A, Subramaniam S, Bourgeois E, Archer C, Cheung KL, Hardman C, Chandler D, Salimi M, Gutowska-Owsiak D, de la Serna JB, Fallon PG, Jolin H, Mckenzie A, Dziembowski A, Podobas EI, Bal W, Johnson D, Moody DB, Cerundolo V, Ogg G. Filaggrin inhibits generation of CD1a neolipid antigens by house dust mite-derived phospholipase. Sci Transl Med 2016; 8:325ra18. [PMID: 26865566 PMCID: PMC4872823 DOI: 10.1126/scitranslmed.aad6833] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Atopic dermatitis is a common pruritic skin disease in which barrier dysfunction and cutaneous inflammation contribute to pathogenesis. Mechanisms underlying the associated inflammation are not fully understood, and although Langerhans cells expressing the nonclassical major histocompatibility complex (MHC) family member CD1a are known to be enriched within lesions, their role in clinical disease pathogenesis has not been studied. We observed that house dust mite (HDM) allergen generates neolipid antigens presented by CD1a to T cells in the blood and skin lesions of affected individuals. HDM-responsive CD1a-reactive T cells increased in frequency after birth in individuals with atopic dermatitis and showed rapid effector function, consistent with antigen-driven maturation. In HDM-challenged human skin, we observed phospholipase A2 (PLA2) activity in vivo. CD1a-reactive T cell activation was dependent on HDM-derived PLA2, and such cells infiltrated the skin after allergen challenge. Moreover, we observed that the skin barrier protein filaggrin, insufficiency of which is associated with atopic skin disease, inhibited PLA2 activity and decreased CD1a-reactive PLA2-generated neolipid-specific T cell activity from skin and blood. The most widely used classification schemes of hypersensitivity suggest that nonpeptide stimulants of T cells act as haptens that modify peptides or proteins; however, our results show that HDM proteins may also generate neolipid antigens that directly activate T cells. These data define PLA2 inhibition as a function of filaggrin, supporting PLA2 inhibition as a therapeutic approach.
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Affiliation(s)
- Rachael Jarrett
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Mariolina Salio
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Antonia Lloyd-Lavery
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Sumithra Subramaniam
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Elvire Bourgeois
- Division of Rheumatology, Immunology and Allergy, Department of Medicine Brigham and Women’s Hospital, Harvard Medical School, 1 Jimmy Fund Way, Boston, Massachusetts, 02114, USA
| | - Charles Archer
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Ka Lun Cheung
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Clare Hardman
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - David Chandler
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Maryam Salimi
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Danuta Gutowska-Owsiak
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Jorge Bernardino de la Serna
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Padraic G. Fallon
- Trinity Biomedical Sciences Institute, Trinity College, Dublin, Ireland
- Institute of Molecular Medicine, St James’s Hospital, Dublin, Ireland
- National Children’s Research Centre, Our Lady’s Childrens Hospital, Dublin, Ireland
| | - Helen Jolin
- MRC Laboratory of Molecular Biology, Cambridge, UK
| | | | - Andrzej Dziembowski
- Institute of Biochemistry and Biophysics Polish Academy of Sciences, Warsaw, Poland
| | - Ewa Izabela Podobas
- Institute of Biochemistry and Biophysics Polish Academy of Sciences, Warsaw, Poland
| | - Wojciech Bal
- Institute of Biochemistry and Biophysics Polish Academy of Sciences, Warsaw, Poland
| | - David Johnson
- Department of Plastic and Reconstructive Surgery, John Radcliffe Hospital, Oxford University Hospitals NHS Trust, UK
| | - D Branch Moody
- Division of Rheumatology, Immunology and Allergy, Department of Medicine Brigham and Women’s Hospital, Harvard Medical School, 1 Jimmy Fund Way, Boston, Massachusetts, 02114, USA
| | - Vincenzo Cerundolo
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
| | - Graham Ogg
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, UK
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110
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Richards DM, Kyewski B, Feuerer M. Re-examining the Nature and Function of Self-Reactive T cells. Trends Immunol 2016; 37:114-125. [PMID: 26795134 PMCID: PMC7611850 DOI: 10.1016/j.it.2015.12.005] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Revised: 12/11/2015] [Accepted: 12/13/2015] [Indexed: 01/08/2023]
Abstract
Recent studies have leveraged MHC tetramer and TCR sequencing approaches towards a more precise characterization of the peripheral T cell repertoire, providing important insight into both the contribution of self-reactive T cells to the overall repertoire and their function. The peripheral T cell repertoire of healthy individuals contains a high frequency of diverse, self-reactive T cells. Furthermore, self-reactive T cells can perform essential beneficial physiological functions. We review these recent findings here, and discuss their implications to the current understanding of peripheral tolerance and the role of self-reactive T cells in autoimmune disease. We outline gaps in understanding, and argue that an important step forward is to revise the definition of self-reactive T cells to incorporate new concepts regarding the nature and physiological functions of different populations of T cells capable of recognizing self-antigens.
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Affiliation(s)
- David M Richards
- Immune Tolerance, Tumor Immunology Program, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany; Current address: Immunology Department, Apogenix GmbH, Im Neuenheimer Feld 584, 69120 Heidelberg, Germany
| | - Bruno Kyewski
- Developmental Immunology, Tumor Immunology Program, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany
| | - Markus Feuerer
- Immune Tolerance, Tumor Immunology Program, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.
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111
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Van Rhijn I, van Berlo T, Hilmenyuk T, Cheng TY, Wolf BJ, Tatituri RVV, Uldrich AP, Napolitani G, Cerundolo V, Altman JD, Willemsen P, Huang S, Rossjohn J, Besra GS, Brenner MB, Godfrey DI, Moody DB. Human autoreactive T cells recognize CD1b and phospholipids. Proc Natl Acad Sci U S A 2016; 113:380-5. [PMID: 26621732 PMCID: PMC4720340 DOI: 10.1073/pnas.1520947112] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
In contrast with the common detection of T cells that recognize MHC, CD1a, CD1c, or CD1d proteins, CD1b autoreactive T cells have been difficult to isolate in humans. Here we report the development of polyvalent complexes of CD1b proteins and carbohydrate backbones (dextramers) and their use in identifying CD1b autoreactive T cells from human donors. Activation is mediated by αβ T-cell receptors (TCRs) binding to CD1b-phospholipid complexes, which is sufficient to activate autoreactive responses to CD1b-expressing cells. Using mass spectrometry and T-cell responses to scan through the major classes of phospholipids, we identified phosphatidylglycerol (PG) as the immunodominant lipid antigen. T cells did not discriminate the chemical differences that distinguish mammalian PG from bacterial PG. Whereas most models of T-cell recognition emphasize TCR discrimination of differing self and foreign structures, CD1b autoreactive T cells recognize lipids with dual self and foreign origin. PG is rare in the cellular membranes that carry CD1b proteins. However, bacteria and mitochondria are rich in PG, so these data point to a more general mechanism of immune detection of infection- or stress-associated lipids.
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Affiliation(s)
- Ildiko Van Rhijn
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115; Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584CL Utrecht, The Netherlands;
| | - Twan van Berlo
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584CL Utrecht, The Netherlands
| | - Tamara Hilmenyuk
- Department of Microbiology & Immunology, Peter Doherty Institute, University of Melbourne, Parkville, VIC 3010, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, VIC 3010, Australia
| | - Tan-Yun Cheng
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Benjamin J Wolf
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Raju V V Tatituri
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Adam P Uldrich
- Department of Microbiology & Immunology, Peter Doherty Institute, University of Melbourne, Parkville, VIC 3010, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, VIC 3010, Australia
| | - Giorgio Napolitani
- Medical Research Council Human Immunology Unit, Radcliffe Department of Medicine, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom
| | - Vincenzo Cerundolo
- Medical Research Council Human Immunology Unit, Radcliffe Department of Medicine, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford OX3 9DS, United Kingdom
| | | | - Peter Willemsen
- Central Veterinary Institute, Wageningen University, 8219 PH Lelystad, The Netherlands
| | - Shouxiong Huang
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Jamie Rossjohn
- Infection and Immunity Program, Monash University, Wellington Road, Clayton, VIC 3800, Australia; Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Wellington Road, Clayton, VIC 3800, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Wellington Road, Clayton, VIC 3800, Australia; Institute of Infection and Immunity, Cardiff University, Cardiff CF10 3XQ, United Kingdom
| | - Gurdyal S Besra
- School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - Michael B Brenner
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115;
| | - Dale I Godfrey
- Department of Microbiology & Immunology, Peter Doherty Institute, University of Melbourne, Parkville, VIC 3010, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, VIC 3010, Australia
| | - D Branch Moody
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115;
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Roy S, Ly D, Castro CD, Li NS, Hawk AJ, Altman JD, Meredith SC, Piccirilli JA, Moody DB, Adams EJ. Molecular Analysis of Lipid-Reactive Vδ1 γδ T Cells Identified by CD1c Tetramers. THE JOURNAL OF IMMUNOLOGY 2016; 196:1933-42. [PMID: 26755823 DOI: 10.4049/jimmunol.1502202] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 10/13/2015] [Accepted: 12/05/2015] [Indexed: 02/06/2023]
Abstract
CD1c is abundantly expressed on human dendritic cells (DC) and B cells, where it binds and displays lipid Ags to T cells. In this study, we report that CD1c tetramers carrying Mycobacterium tuberculosis phosphomycoketide bind γδ TCRs. An unbiased method of ligand-based TCR selection detects interactions only with Vδ1(+) TCRs, and mutational analyses demonstrate a role of the Vδ1 domain during recognition. These results strengthen evidence for a role of CD1c in the γδ T cell response, providing biophysical evidence for CD1c-γδ TCR interactions and a named foreign Ag. Surprisingly, TCRs also bind CD1c complexes formed with diverse lipids such as lysophosphatidylcholine, sulfatide, or mannosyl-phosophomycoketide, but not lipopeptide ligands. Dissection of TCR interactions with CD1c carrying foreign Ags, permissive ligands, and nonpermissive lipid ligands clarifies the molecular basis of the frequently observed but poorly understood phenomenon of mixed self- and foreign Ag reactivity in the CD1 system.
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Affiliation(s)
- Sobhan Roy
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637
| | - Dalam Ly
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Boston, MA 02115; Department of Immunology, University of Toronto, Toronto, Ontario M5S 1A8, Canada
| | - Caitlin D Castro
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637; Committee on Immunology, University of Chicago, Chicago, IL 60637
| | - Nan-Sheng Li
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637
| | - Andrew J Hawk
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637; Department of Pathology, University of Chicago, Chicago, IL 60637
| | - John D Altman
- Department of Microbiology and Immunology, Emory Vaccine Center at Yerkes, Emory University School of Medicine, Atlanta, GA 30329; and
| | - Stephen C Meredith
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637; Department of Pathology, University of Chicago, Chicago, IL 60637
| | - Joseph A Piccirilli
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637; Department of Chemistry, University of Chicago, Chicago, IL 60637
| | - D Branch Moody
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Boston, MA 02115;
| | - Erin J Adams
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637; Committee on Immunology, University of Chicago, Chicago, IL 60637;
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113
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Subramaniam S, Aslam A, Misbah SA, Salio M, Cerundolo V, Moody DB, Ogg G. Elevated and cross-responsive CD1a-reactive T cells in bee and wasp venom allergic individuals. Eur J Immunol 2016; 46:242-52. [PMID: 26518614 PMCID: PMC4738458 DOI: 10.1002/eji.201545869] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/28/2015] [Accepted: 10/16/2015] [Indexed: 01/14/2023]
Abstract
The role of CD1a-reactive T cells in human allergic disease is unknown. We have previously shown that circulating CD1a-reactive T cells recognize neolipid antigens generated by bee and wasp venom phospholipase, and here tested the hypothesis that venom-responsive CD1a-reactive T cells associate with venom allergy. Circulating T cells from bee and wasp venom allergic individuals, before and during immunotherapy, were exposed to CD1a-transfected K562 cells in the presence of wasp or bee venom. T-cell response was evaluated based on IFNγ, GM-CSF, and IL-13 cytokine production. Venom allergic individuals showed significantly higher frequencies of IFN-γ, GM-CSF, and IL-13 producing CD1a-reactive T cells responsive to venom and venom-derived phospholipase than healthy individuals. Venom-responsive CD1a-reactive T cells were cross-responsive between wasp and bee suggesting shared pathways of allergenicity. Frequencies of CD1a-reactive T cells were initially induced during subcutaneous immunotherapy, peaking by weeks 5, but then reduced despite escalation of antigen dose. Our current understanding of venom allergy and immunotherapy is largely based on peptide and protein-specific T cell and antibody responses. Here, we show that lipid antigens and CD1a-reactive T cells associate with the allergic response. These data have implications for mechanisms of allergy and approaches to immunotherapy.
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Affiliation(s)
- Sumithra Subramaniam
- MRC Human Immunology UnitWeatherall Institute of Molecular Medicine and University of Oxford, NIHR Biomedical Research CentreOxfordEnglandUK
| | - Aamir Aslam
- Section of Musculoskeletal DiseaseUniversity of LeedsLeedsUK
| | - Siraj A. Misbah
- Department of Clinical ImmunologyOxford University Hospitals NHS TrustOxfordUK
| | - Mariolina Salio
- MRC Human Immunology UnitWeatherall Institute of Molecular Medicine and University of Oxford, NIHR Biomedical Research CentreOxfordEnglandUK
| | - Vincenzo Cerundolo
- MRC Human Immunology UnitWeatherall Institute of Molecular Medicine and University of Oxford, NIHR Biomedical Research CentreOxfordEnglandUK
| | - D Branch Moody
- Division of RheumatologyImmunology and AllergyDepartment of MedicineBrigham and Women's HospitalHarvard Medical SchoolBostonMAUSA
| | - Graham Ogg
- MRC Human Immunology UnitWeatherall Institute of Molecular Medicine and University of Oxford, NIHR Biomedical Research CentreOxfordEnglandUK
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Schjaerff M, Keller SM, Fass J, Froenicke L, Grahn RA, Lyons L, Affolter VK, Kristensen AT, Moore PF. Refinement of the canine CD1 locus topology and investigation of antibody binding to recombinant canine CD1 isoforms. Immunogenetics 2015; 68:191-204. [DOI: 10.1007/s00251-015-0889-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Accepted: 12/04/2015] [Indexed: 11/29/2022]
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115
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Van Rhijn I, Moody DB. Donor Unrestricted T Cells: A Shared Human T Cell Response. THE JOURNAL OF IMMUNOLOGY 2015; 195:1927-32. [PMID: 26297792 DOI: 10.4049/jimmunol.1500943] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The now-famous term "restriction" derived from experiments in which T cells from Donor A failed to recognize Ags presented by cells from Donor B. Restriction results from interdonor variation in MHC genes. Donor restriction dominates immunologists' thinking about the T cell response because it governs organ transplantation and hinders the discovery of disease-associated Ags. However, other T cells can be considered "donor unrestricted" because their targets, CD1a, CD1b, CD1c, CD1d, or MR1, are expressed in a similar form among all humans. A striking feature of donor unrestricted T cells is the expression of invariant TCRs with nearly species-wide distribution. In this article, we review new evidence that donor unrestricted T cells are common in humans. NKT cells, mucosa-associated invariant T cells, and germline-encoded mycolyl-reactive T cells operate outside of the familiar principles of the MHC system, providing a broader picture of T cell function and new opportunities for therapy.
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Affiliation(s)
- Ildiko Van Rhijn
- Division of Rheumatology, Immunology, and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115; and Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584CL Utrecht, the Netherlands
| | - D Branch Moody
- Division of Rheumatology, Immunology, and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115; and
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116
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Zhao J, Siddiqui S, Shang S, Bian Y, Bagchi S, He Y, Wang CR. Mycolic acid-specific T cells protect against Mycobacterium tuberculosis infection in a humanized transgenic mouse model. eLife 2015; 4. [PMID: 26652001 PMCID: PMC4718816 DOI: 10.7554/elife.08525] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 11/01/2015] [Indexed: 11/25/2022] Open
Abstract
Group 1 CD1 molecules, CD1a, CD1b and CD1c, present lipid antigens from Mycobacterium tuberculosis (Mtb) to T cells. Mtb lipid-specific group 1 CD1-restricted T cells have been detected in Mtb-infected individuals. However, their role in protective immunity against Mtb remains unclear due to the absence of group 1 CD1 expression in mice. To overcome the challenge, we generated mice that expressed human group 1 CD1 molecules (hCD1Tg) and a CD1b-restricted, mycolic-acid specific TCR (DN1Tg). Using DN1Tg/hCD1Tg mice, we found that activation of DN1 T cells was initiated in the mediastinal lymph nodes and showed faster kinetics compared to Mtb Ag85B-specific CD4+ T cells after aerosol infection with Mtb. Additionally, activated DN1 T cells exhibited polyfunctional characteristics, accumulated in lung granulomas, and protected against Mtb infection. Therefore, our findings highlight the vaccination potential of targeting group 1 CD1-restricted lipid-specific T cells against Mtb infection. DOI:http://dx.doi.org/10.7554/eLife.08525.001 Most cases of tuberculosis are caused by a bacterium called Mycobacterium tuberculosis, which is believed to have infected one third of the world’s population. Most of these infections are dormant and don’t cause any symptoms. However, active infections can be deadly if left untreated and often require six months of treatment with multiple antibiotics. One reason why these infections are so difficult to treat is because the M. tuberculosis cell walls contain fatty molecules known as mycolic acids, which make the bacteria less susceptible to antibiotics. These molecules also help the bacteria to subvert and then hide from the immune system. The prevalence of the disease and the increasing problem of antibiotic resistance have spurred the search for an effective vaccine against tuberculosis. While most efforts have focused on using protein fragments in tuberculosis vaccines, some evidence suggests that human immune cells can recognize fatty molecules such as mycolic acids and that these cells could help manage and control M. tuberculosis infections. However, it has been difficult to determine whether these immune cells genuinely play a protective role against the disease because most vaccine research uses mouse models and mice do not have an equivalent of these immune cells. Now, Zhao et al. have engineered a “humanized” mouse model that produces the fatty molecule-specific immune cells, and show that these mice do respond to the presence of mycolic acids. Infecting the genetically engineered mice with M. tuberculosis revealed that the fatty molecule-specific immune cells were quickly activated within lymph nodes at the center of the chest. These cells later accumulated at sites in the lung where the bacteria reside, and ultimately protected against M. tuberculosis infection. The results show that these specific immune cells can counteract M. tuberculosis, and highlight the potential of using mycolic acids to generate an effective vaccine that provides protection against tuberculosis. DOI:http://dx.doi.org/10.7554/eLife.08525.002
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Affiliation(s)
- Jie Zhao
- Department of Microbiology and Immunology, Northwestern University, Chicago, United States
| | - Sarah Siddiqui
- Department of Microbiology and Immunology, Northwestern University, Chicago, United States
| | - Shaobin Shang
- Department of Microbiology and Immunology, Northwestern University, Chicago, United States
| | - Yao Bian
- Department of Microbiology and Immunology, Northwestern University, Chicago, United States
| | - Sreya Bagchi
- Department of Microbiology and Immunology, Northwestern University, Chicago, United States
| | - Ying He
- Department of Microbiology and Immunology, Northwestern University, Chicago, United States
| | - Chyung-Ru Wang
- Department of Microbiology and Immunology, Northwestern University, Chicago, United States
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117
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Shinya E, Shimizu M, Owaki A, Paoletti S, Mori L, De Libero G, Takahashi H. Hemopoietic cell kinase (Hck) and p21-activated kinase 2 (PAK2) are involved in the down-regulation of CD1a lipid antigen presentation by HIV-1 Nef in dendritic cells. Virology 2015; 487:285-95. [PMID: 26584215 DOI: 10.1016/j.virol.2015.10.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2015] [Revised: 10/21/2015] [Accepted: 10/24/2015] [Indexed: 11/28/2022]
Abstract
Dendritic cells (DCs) play a major role in in vivo pathogenesis of HIV-1 infection. Therefore, DCs may provide a promising strategy to control and eventually overcome the fatal infection. Especially, immature DCs express all CD1s, the non-MHC lipid antigen -presenting molecules, and HIV-1 Nef down-regulates CD1 expression besides MHC. Moreover, CD1d-restricted CD4(+) NKT cells are infected by HIV-1, reducing the number of these cells in HIV-1-infected individuals. To understand the exact role of DCs and CD1-mediated immune response during HIV-1 infection, Nef down-regulation of CD1a-restricted lipid/glycolipid Ag presentation in iDCs was analyzed. We demonstrated the involvement of the association of Nef with hemopoietic cell kinase (Hck) and p21-activated kinase 2 (PAK2), and that Hck, which is expressed strongly in iDCs, augmented this mutual interaction. Hck might be another therapeutic target to preserve the function of HIV-1 infected DCs, which are potential reservoirs of HIV-1 even after antiretroviral therapy.
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Affiliation(s)
- Eiji Shinya
- Department of Microbiology and Immunology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo city, Tokyo 113-8602, Japan
| | - Masumi Shimizu
- Department of Microbiology and Immunology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo city, Tokyo 113-8602, Japan
| | - Atsuko Owaki
- Department of Microbiology and Immunology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo city, Tokyo 113-8602, Japan
| | - Samantha Paoletti
- Experimental Immunology, Department of Biomedicine, University Hospital Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland
| | - Lucia Mori
- Experimental Immunology, Department of Biomedicine, University Hospital Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland
| | - Gennaro De Libero
- Experimental Immunology, Department of Biomedicine, University Hospital Basel, Hebelstrasse 20, CH-4031 Basel, Switzerland
| | - Hidemi Takahashi
- Department of Microbiology and Immunology, Nippon Medical School, 1-1-5 Sendagi, Bunkyo city, Tokyo 113-8602, Japan
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118
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Dellabona P, Consonni M, de Lalla C, Casorati G. Group 1 CD1-restricted T cells and the pathophysiological implications of self-lipid antigen recognition. ACTA ACUST UNITED AC 2015; 86:393-405. [PMID: 26514448 DOI: 10.1111/tan.12689] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
T cell responses are generally regarded as specific for protein-derived peptide antigens. This is based on the molecular paradigm dictated by the T cell receptor (TCR) recognition of peptide-major histocompatibility complexs, which provides the molecular bases of the specificity and restriction of the T cell responses. An increasing number of findings in the last 20 years have challenged this paradigm, by showing the existence of T cells specific for lipid antigens presented by CD1 molecules. CD1-restricted T cells have been proven to be frequent components of the immune system and to recognize exogenous lipids, derived from pathogenic bacteria, as well as cell-endogenous self-lipids. This represents a young and exciting area of research in immunology with intriguing biological bases and a potential direct impact on human health.
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Affiliation(s)
- P Dellabona
- Experimental Immunology Unit, Division of Immunology, Transplantation and Infectious Diseases, San Raffaele Scientific Institute, Milano, Italy
| | - M Consonni
- Experimental Immunology Unit, Division of Immunology, Transplantation and Infectious Diseases, San Raffaele Scientific Institute, Milano, Italy
| | - C de Lalla
- Experimental Immunology Unit, Division of Immunology, Transplantation and Infectious Diseases, San Raffaele Scientific Institute, Milano, Italy
| | - G Casorati
- Experimental Immunology Unit, Division of Immunology, Transplantation and Infectious Diseases, San Raffaele Scientific Institute, Milano, Italy
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119
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Seshadri C, Lin L, Scriba TJ, Peterson G, Freidrich D, Frahm N, DeRosa SC, Moody DB, Prandi J, Gilleron M, Mahomed H, Jiang W, Finak G, Hanekom WA, Gottardo R, McElrath MJ, Hawn TR. T Cell Responses against Mycobacterial Lipids and Proteins Are Poorly Correlated in South African Adolescents. THE JOURNAL OF IMMUNOLOGY 2015; 195:4595-603. [PMID: 26466957 DOI: 10.4049/jimmunol.1501285] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Accepted: 09/15/2015] [Indexed: 11/19/2022]
Abstract
Human T cells are activated by both peptide and nonpeptide Ags produced by Mycobacterium tuberculosis. T cells recognize cell wall lipids bound to CD1 molecules, but effector functions of CD1-reactive T cells have not been systematically assessed in M. tuberculosis-infected humans. It is also not known how these features correlate with T cell responses to secreted protein Ags. We developed a flow cytometric assay to profile CD1-restricted T cells ex vivo and assessed T cell responses to five cell wall lipid Ags in a cross-sectional study of 19 M. tuberculosis-infected and 22 M. tuberculosis-uninfected South African adolescents. We analyzed six T cell functions using a recently developed computational approach for flow cytometry data in high dimensions. We compared these data with T cell responses to five protein Ags in the same cohort. We show that CD1b-restricted T cells producing antimycobacterial cytokines IFN-γ and TNF-α are detectable ex vivo in CD4(+), CD8(+), and CD4(-)CD8(-) T cell subsets. Glucose monomycolate was immunodominant among lipid Ags tested, and polyfunctional CD4 T cells specific for this lipid simultaneously expressed CD40L, IFN-γ, IL-2, and TNF-α. Lipid-reactive CD4(+) T cells were detectable at frequencies of 0.001-0.01%, and this did not differ by M. tuberculosis infection status. Finally, CD4 T cell responses to lipids were poorly correlated with CD4 T cell responses to proteins (Spearman rank correlation -0.01; p = 0.95). These results highlight the functional diversity of CD1-restricted T cells circulating in peripheral blood as well as the complementary nature of T cell responses to mycobacterial lipids and proteins. Our approach enables further population-based studies of lipid-specific T cell responses during natural infection and vaccination.
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Affiliation(s)
- Chetan Seshadri
- Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, WA 98109;
| | - Lin Lin
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Thomas J Scriba
- South African TB Vaccine Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town 7700, South Africa; Department of Pediatrics and Child Health, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town 7700, South Africa
| | - Glenna Peterson
- Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, WA 98109
| | - David Freidrich
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109; HIV Vaccine Trials Network, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Nicole Frahm
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109; HIV Vaccine Trials Network, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Stephen C DeRosa
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109; HIV Vaccine Trials Network, Fred Hutchinson Cancer Research Center, Seattle, WA 98109; Department of Laboratory Medicine, University of Washington, Seattle WA 98109
| | - D Branch Moody
- Division of Rheumatology, Allergy, and Immunology, Department of Medicine, Brigham and Women's Hospital, Boston, MA 02115
| | - Jacques Prandi
- Institut de Pharmacologie et Biologie Structurale, Centre National de la Recherche Scientifique, Toulouse 31077, France; and
| | - Martine Gilleron
- Institut de Pharmacologie et Biologie Structurale, Centre National de la Recherche Scientifique, Toulouse 31077, France; and
| | - Hassan Mahomed
- Division of Community Health, Stellenbosch University, Stellanbosch 7602, South Africa
| | - Wenxin Jiang
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Greg Finak
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Willem A Hanekom
- South African TB Vaccine Initiative, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town 7700, South Africa; Department of Pediatrics and Child Health, Institute of Infectious Disease and Molecular Medicine, University of Cape Town, Cape Town 7700, South Africa
| | - Raphael Gottardo
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - M Juliana McElrath
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA 98109; HIV Vaccine Trials Network, Fred Hutchinson Cancer Research Center, Seattle, WA 98109
| | - Thomas R Hawn
- Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, WA 98109
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120
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K Gratz I, Kofler B. UV irradiation-induced inflammation, what is the trigger? Exp Dermatol 2015; 24:916-7. [PMID: 26442793 DOI: 10.1111/exd.12849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2015] [Indexed: 12/16/2022]
Affiliation(s)
- Iris K Gratz
- Department of Molecular Biology, University of Salzburg, Salzburg, Austria
| | - Barbara Kofler
- Department of Pediatrics, Research Program for Receptor Biochemistry and Tumor Metabolism, Laura Bassi Centre of Expertise-THERAPEP, Paracelsus Medical University, Salzburg, Austria
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121
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Van Rhijn I, Godfrey DI, Rossjohn J, Moody DB. Lipid and small-molecule display by CD1 and MR1. Nat Rev Immunol 2015; 15:643-54. [PMID: 26388332 PMCID: PMC6944187 DOI: 10.1038/nri3889] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The antigen-presenting molecules CD1 and MHC class I-related protein (MR1) display lipids and small molecules to T cells. The antigen display platforms in the four CD1 proteins are laterally asymmetrical, so that the T cell receptor (TCR)-binding surfaces are comprised of roofs and portals, rather than the long grooves seen in the MHC antigen-presenting molecules. TCRs can bind CD1 proteins with left-sided or right-sided footprints, creating unexpected modes of antigen recognition. The use of tetramers of human CD1a, CD1b, CD1c or MR1 proteins now allows detailed analysis of the human T cell repertoire, which has revealed new invariant TCRs that bind CD1b molecules and are different from those that define natural killer T cells and mucosal-associated invariant T cells.
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MESH Headings
- Antigen Presentation/immunology
- Antigens, CD1/chemistry
- Antigens, CD1/immunology
- Antigens, CD1/metabolism
- Histocompatibility Antigens Class I/chemistry
- Histocompatibility Antigens Class I/immunology
- Histocompatibility Antigens Class I/metabolism
- Humans
- Lipids/chemistry
- Lipids/immunology
- Minor Histocompatibility Antigens
- Models, Molecular
- Protein Binding/immunology
- Protein Structure, Tertiary
- Receptors, Antigen, T-Cell/chemistry
- Receptors, Antigen, T-Cell/immunology
- Receptors, Antigen, T-Cell/metabolism
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
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Affiliation(s)
- Ildiko Van Rhijn
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Dale I Godfrey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program and The Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
- Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - D Branch Moody
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
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122
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Mokuda S, Miyazaki T, Ubara Y, Kanno M, Sugiyama E, Takasugi K, Masumoto J. CD1a+ survivin+ dendritic cell infiltration in dermal lesions of systemic sclerosis. Arthritis Res Ther 2015; 17:275. [PMID: 26419626 PMCID: PMC4588499 DOI: 10.1186/s13075-015-0785-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2015] [Accepted: 09/09/2015] [Indexed: 12/22/2022] Open
Abstract
INTRODUCTION Proto-oncogene survivin is a member of the inhibitor of apoptosis (IAP) family of proteins. The presence of serous antibodies against survivin in patients with systemic sclerosis has been previously reported; however, there are few reports regarding the pathophysiological relationship between survivin and systemic sclerosis. We herein investigated the expression and function of survivin in SSc patients. METHODS We performed immunohistochemistry analyses to determine the expression of XIAP, cIAP and survivin in skin lesions from patients with SSc and non-SSc. The expression levels of survivin in peripheral blood mononuclear cells (PBMCs) obtained from SSc patients and healthy controls were evaluated using RT-PCR and flow cytometry. Additionally, the function of survivin was verified with overexpression experiments using monocyte-derived dendritic cells (Mo-DCs). RESULTS The expression patterns of both XIAP and cIAP were similar, while only the survivin expression differed between the SSc and non-SSc skin lesions. Survivin-overexpressing cells were detected in the SSc dermis frequently. The positive rate of survivin in SSc dermis (64.3%, 9/14) was higher than that in non-SSc dermis (11.2%, 1/9). Furthermore, survivin+ cells expressed CD1a, one of the DC markers. Real-time PCR and FACS analyses revealed that the survivin-WT (wild type) expression levels in PBMCs, in particular CD14+ monocytes, from SSc patients were higher than that from healthy controls. Additionally, the overexpression experiments showed that survivin-WT-overexpressing CD1a+ Mo-DCs have the characteristics of promoting cell cycle progression and decreasing apoptotic cells. CONCLUSIONS These findings suggest that dermal survivin+ CD1a+ cell infiltration may be a potential biomarker of SSc skin lesions. PBMCs and monocytes from SSc patients also overexpressed survivin; therefore, dermal survivin+ DC may be derived from peripheral blood monocytes. Additionally, survivin may be involved in dermal CD1a+ DC proliferation through cell cycle activation and resistance to apoptosis. Survivin may be an important molecule for the pathogenesis of SSc.
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Affiliation(s)
- Sho Mokuda
- Department of Immunology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan. .,Department of Pathology, Ehime University Proteo-Science Centre and Graduate School of Medicine, Shizukawa, Toon, Ehime, 791-0295, Japan. .,Department of Internal Medicine, Center for Rheumatic Diseases, Dohgo Spa Hospital, 21-21 Otsu Dohgo-Himezuka, Matsuyama, Ehime, 790-0858, Japan. .,Department of Clinical Immunology and Rheumatology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.
| | - Tatsuhiko Miyazaki
- Department of Pathology, Ehime University Proteo-Science Centre and Graduate School of Medicine, Shizukawa, Toon, Ehime, 791-0295, Japan.
| | - Yoshifumi Ubara
- Nephrology Center and the Okinaka Memorial Institute for Medical Research, Toranomon Hospital, 2-2-2 Toranomon, Minato-ku, Tokyo, 105-8470, Japan.
| | - Masamoto Kanno
- Department of Immunology, Graduate School of Biomedical and Health Sciences, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.
| | - Eiji Sugiyama
- Department of Clinical Immunology and Rheumatology, Hiroshima University Hospital, 1-2-3 Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.
| | - Kiyoshi Takasugi
- Department of Internal Medicine, Center for Rheumatic Diseases, Dohgo Spa Hospital, 21-21 Otsu Dohgo-Himezuka, Matsuyama, Ehime, 790-0858, Japan.
| | - Junya Masumoto
- Department of Pathology, Ehime University Proteo-Science Centre and Graduate School of Medicine, Shizukawa, Toon, Ehime, 791-0295, Japan.
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Abstract
Over two decades ago, it was discovered that the human T-cell repertoire contains T cells that do not recognize peptide antigens in the context of MHC molecules but instead respond to lipid antigens presented by CD1 antigen-presenting molecules. The ability of T cells to 'see' lipid antigens bound to CD1 enables these lymphocytes to sense changes in the lipid composition of cells and tissues as a result of infections, inflammation, or malignancies. Although foreign lipid antigens have been shown to function as antigens for CD1-restricted T cells, many CD1-restricted T cells do not require foreign antigens for activation but instead can be activated by self-lipids presented by CD1. This review highlights recent developments in the field, including the identification of common mammalian lipids that function as autoantigens for αβ and γδ T cells, a novel mode of T-cell activation whereby CD1a itself rather than lipids serves as the autoantigen, and various mechanisms by which the activation of CD1-autoreactive T cells is regulated. As CD1 can induce T-cell effector functions in the absence of foreign antigens, multiple mechanisms are in place to regulate this self-reactivity, and stimulatory CD1-lipid complexes appear to be tightly controlled in space and time.
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124
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Wolf BJ, Tatituri RVV, Almeida CF, Le Nours J, Bhowruth V, Johnson D, Uldrich AP, Hsu FF, Brigl M, Besra GS, Rossjohn J, Godfrey DI, Brenner MB. Identification of a Potent Microbial Lipid Antigen for Diverse NKT Cells. THE JOURNAL OF IMMUNOLOGY 2015; 195:2540-51. [PMID: 26254340 DOI: 10.4049/jimmunol.1501019] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2015] [Accepted: 07/10/2015] [Indexed: 01/17/2023]
Abstract
Semi-invariant/type I NKT cells are a well-characterized CD1d-restricted T cell subset. The availability of potent Ags and tetramers for semi-invariant/type I NKT cells allowed this population to be extensively studied and revealed their central roles in infection, autoimmunity, and tumor immunity. In contrast, diverse/type II NKT (dNKT) cells are poorly understood because the lipid Ags that they recognize are largely unknown. We sought to identify dNKT cell lipid Ag(s) by interrogating a panel of dNKT mouse cell hybridomas with lipid extracts from the pathogen Listeria monocytogenes. We identified Listeria phosphatidylglycerol as a microbial Ag that was significantly more potent than a previously characterized dNKT cell Ag, mammalian phosphatidylglycerol. Further, although mammalian phosphatidylglycerol-loaded CD1d tetramers did not stain dNKT cells, the Listeria-derived phosphatidylglycerol-loaded tetramers did. The structure of Listeria phosphatidylglycerol was distinct from mammalian phosphatidylglycerol because it contained shorter, fully-saturated anteiso fatty acid lipid tails. CD1d-binding lipid-displacement studies revealed that the microbial phosphatidylglycerol Ag binds significantly better to CD1d than do counterparts with the same headgroup. These data reveal a highly potent microbial lipid Ag for a subset of dNKT cells and provide an explanation for its increased Ag potency compared with the mammalian counterpart.
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Affiliation(s)
- Benjamin J Wolf
- Division of Rheumatology, Immunology, and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Raju V V Tatituri
- Division of Rheumatology, Immunology, and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Catarina F Almeida
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging at University of Melbourne, Parkville, Victoria 3010, Australia
| | - Jérôme Le Nours
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Veemal Bhowruth
- School of Biosciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Darryl Johnson
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging at University of Melbourne, Parkville, Victoria 3010, Australia
| | - Adam P Uldrich
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging at University of Melbourne, Parkville, Victoria 3010, Australia
| | - Fong-Fu Hsu
- Division of Endocrinology, Metabolism, and Lipid Research, Washington University, St. Louis, MO 63110
| | - Manfred Brigl
- Department of Pathology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115; and
| | - Gurdyal S Besra
- School of Biosciences, University of Birmingham, Birmingham B15 2TT, United Kingdom
| | - Jamie Rossjohn
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia; Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, United Kingdom
| | - Dale I Godfrey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging at University of Melbourne, Parkville, Victoria 3010, Australia
| | - Michael B Brenner
- Division of Rheumatology, Immunology, and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115;
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125
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Salio M, Cerundolo V. Regulation of Lipid Specific and Vitamin Specific Non-MHC Restricted T Cells by Antigen Presenting Cells and Their Therapeutic Potentials. Front Immunol 2015; 6:388. [PMID: 26284072 PMCID: PMC4517378 DOI: 10.3389/fimmu.2015.00388] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 07/13/2015] [Indexed: 12/17/2022] Open
Abstract
Since initial reports, more than 25 years ago, that T cells recognize lipids in the context on non-polymorphic CD1 molecules, our understanding of antigen presentation to non-peptide-specific T cell populations has deepened. It is now clear that αβ T cells bearing semi-invariant T cell receptor, as well as subsets of γδ T cells, recognize a variety of self and non-self lipids and contribute to shaping immune responses via cross talk with dendritic cells and B cells. Furthermore, it has been demonstrated that small molecules derived from the microbial riboflavin biosynthetic pathway (vitamin B2) bind monomorphic MR1 molecules and activate mucosal-associated invariant T cells, another population of semi-invariant T cells. Novel insights in the biological relevance of non-peptide-specific T cells have emerged with the development of tetrameric CD1 and MR1 molecules, which has allowed accurate enumeration and functional analysis of CD1- and MR1-restricted T cells in humans and discovery of novel populations of semi-invariant T cells. The phenotype and function of non-peptide-specific T cells will be discussed in the context of the known distribution of CD1 and MR1 molecules by different subsets of antigen-presenting cells at steady state and following infection. Concurrent modulation of CD1 transcription and lipid biosynthetic pathways upon TLR stimulation, coupled with efficient lipid antigen processing, result in the increased cell surface expression of antigenic CD1-lipid complexes. Similarly, MR1 expression is almost undetectable in resting APC and it is upregulated following bacterial infection, likely due to stabilization of MR1 molecules by microbial antigens. The tight regulation of CD1 and MR1 expression at steady state and during infection may represent an important mechanism to limit autoreactivity, while promoting T cell responses to foreign antigens.
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Affiliation(s)
- Mariolina Salio
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Vincenzo Cerundolo
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
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126
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Delovitch TL. Imaging of NKT Cell Recirculation and Tissue Migration during Antimicrobial Immunity. Front Immunol 2015; 6:356. [PMID: 26236312 PMCID: PMC4500992 DOI: 10.3389/fimmu.2015.00356] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 06/30/2015] [Indexed: 01/09/2023] Open
Affiliation(s)
- Terry L. Delovitch
- Laboratory of Autoimmune Diabetes, Department of Microbiology and Immunology, Robarts Research Institute, Western University, London, ON, Canada
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127
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Siddiqui S, Visvabharathy L, Wang CR. Role of Group 1 CD1-Restricted T Cells in Infectious Disease. Front Immunol 2015; 6:337. [PMID: 26175733 PMCID: PMC4484338 DOI: 10.3389/fimmu.2015.00337] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 06/16/2015] [Indexed: 12/12/2022] Open
Abstract
The evolutionarily conserved CD1 family of antigen-presenting molecules presents lipid antigens rather than peptide antigens to T cells. CD1 molecules, unlike classical MHC molecules, display limited polymorphism, making CD1-restricted lipid antigens attractive vaccine targets that could be recognized in a genetically diverse human population. Group 1 CD1 (CD1a, CD1b, and CD1c)-restricted T cells have been implicated to play critical roles in a variety of autoimmune and infectious diseases. In this review, we summarize current knowledge and recent discoveries on the development of group 1 CD1-restricted T cells and their function in different infection models. In particular, we focus on (1) newly identified microbial and self-lipid antigens, (2) kinetics, phenotype, and unique properties of group 1 CD1-restricted T cells during infection, and (3) the similarities of group 1 CD1-restricted T cells to the closely related group 2 CD1-restricted T cells.
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Affiliation(s)
- Sarah Siddiqui
- Department of Microbiology and Immunology, Northwestern University Feinberg School of Medicine , Chicago, IL , USA
| | - Lavanya Visvabharathy
- Department of Microbiology and Immunology, Northwestern University Feinberg School of Medicine , Chicago, IL , USA
| | - Chyung-Ru Wang
- Department of Microbiology and Immunology, Northwestern University Feinberg School of Medicine , Chicago, IL , USA
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128
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Guo T, Chamoto K, Hirano N. Adoptive T Cell Therapy Targeting CD1 and MR1. Front Immunol 2015; 6:247. [PMID: 26052329 PMCID: PMC4440381 DOI: 10.3389/fimmu.2015.00247] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Accepted: 05/06/2015] [Indexed: 12/21/2022] Open
Abstract
Adoptive T cell immunotherapy has demonstrated clinically relevant efficacy in treating malignant and infectious diseases. However, much of these therapies have been focused on enhancing, or generating de novo, effector functions of conventional T cells recognizing HLA molecules. Given the heterogeneity of HLA alleles, mismatched patients are ineligible for current HLA-restricted adoptive T cell therapies. CD1 and MR1 are class I-like monomorphic molecules and their restricted T cells possess unique T cell receptor specificity against entirely different classes of antigens. CD1 and MR1 molecules present lipid and vitamin B metabolite antigens, respectively, and offer a new front of targets for T cell therapies. This review will cover the recent progress in the basic research of CD1, MR1, and their restricted T cells that possess translational potential.
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Affiliation(s)
- Tingxi Guo
- Department of Immunology, University of Toronto , Toronto, ON , Canada ; Princess Margaret Cancer Centre, University Health Network , Toronto, ON , Canada
| | - Kenji Chamoto
- Princess Margaret Cancer Centre, University Health Network , Toronto, ON , Canada
| | - Naoto Hirano
- Department of Immunology, University of Toronto , Toronto, ON , Canada ; Princess Margaret Cancer Centre, University Health Network , Toronto, ON , Canada
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129
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Ramirez K, Witherden DA, Havran WL. All hands on DE(T)C: Epithelial-resident γδ T cells respond to tissue injury. Cell Immunol 2015; 296:57-61. [PMID: 25958272 DOI: 10.1016/j.cellimm.2015.04.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Revised: 03/27/2015] [Accepted: 04/19/2015] [Indexed: 12/29/2022]
Abstract
Immunology has traditionally focused on the lymphocytes circulating among primary lymphoid organs while the large reservoir of tissue-resident T cells have received relatively less attention. In epithelia, these populations are comprised of significant, and sometimes exclusive, subsets of γδ T cells that are highly specialized in promoting tissue homeostasis. As the epithelial layers of the skin and gut are permanently exposed to the environment, they are continually subject to injury and therefore require highly efficient repair processes to maintain barrier functions. Here, we review the role of γδ T cells in promoting wound healing, a critical and complex process occurring in the skin and other barrier sites.
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Affiliation(s)
- Kevin Ramirez
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, USA
| | - Deborah A Witherden
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, USA
| | - Wendy L Havran
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, USA.
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130
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Nguyen TKA, Reinink P, El Messlaki C, Im JS, Ercan A, Porcelli SA, Van Rhijn I. Expression patterns of bovine CD1 in vivo and assessment of the specificities of the anti-bovine CD1 antibodies. PLoS One 2015; 10:e0121923. [PMID: 25815476 PMCID: PMC4376853 DOI: 10.1371/journal.pone.0121923] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 02/08/2015] [Indexed: 12/16/2022] Open
Abstract
Research addressing the in vivo effects of T cell activation by lipids, glycolipids, and lipopeptides is hampered by the absence of a suitable animal model. Mice and rats do not express CD1a, CD1b, and CD1c molecules that present pathogen-derived lipid antigens in humans. In cattle, two CD1A and three CD1B genes are transcribed. The proteins encoded by these genes differ in their antigen binding domains and in their cytoplasmic tails, suggesting that they may traffic differently in the cell and thus have access to different antigens. In the current study, we describe the genomic organization of the bovine CD1 locus and transcription of bovine CD1 genes in freshly isolated dendritic cells and B cells from different tissues. After determining the specificity of previously only partly characterized anti-CD1 antibodies by testing recombinant single chain bovine CD1 proteins and CD1-transfected cells, we were able to determine cell surface protein expression on freshly isolated cells. Our study suggests that CD1b1 and CD1b3 are more broadly expressed than CD1b5, and CD1a2 is more broadly expressed than CD1a1. Pseudoafferent lymph dendritic cells express CD1B genes, but no transcription is detected in lymph nodes. Even though B cells transcribe CD1B genes, there is no evidence of protein expression at the cell surface. Thus, patterns of CD1 protein expression are largely conserved among species.
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Affiliation(s)
- Thi Kim Anh Nguyen
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584CL Utrecht, the Netherlands
| | - Peter Reinink
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584CL Utrecht, the Netherlands
| | - Chema El Messlaki
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584CL Utrecht, the Netherlands
| | - Jin S. Im
- Section of Transplant Immunology, Department of Stem Cell Transplantation and Cellular Therapy, The University of Texas MD Anderson Cancer Center, Houston, United States of America
| | - Altan Ercan
- Division of Rheumatology, Immunology, and Allergy, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, United States of America
| | - Steven A. Porcelli
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, United States of America
| | - Ildiko Van Rhijn
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, 3584CL Utrecht, the Netherlands
- Division of Rheumatology, Immunology, and Allergy, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, United States of America
- * E-mail:
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131
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Guerin L, Wu V, Houser B, Tilburgs T, de Jong A, Moody DB, Strominger JL. CD1 Antigen Presentation and Autoreactivity in the Pregnant Human Uterus. Am J Reprod Immunol 2015; 74:126-35. [PMID: 25739697 DOI: 10.1111/aji.12375] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Accepted: 02/10/2015] [Indexed: 01/12/2023] Open
Abstract
PROBLEM CD11c(HI) human decidual macrophages express several isoforms of CD1 molecules. Their expression pattern and function required investigation. METHOD OF STUDY CD11c(HI) macrophages were isolated from decidua. Expression of CD1 isoforms and their ability to present lipid antigens to T cells was studied. RESULTS CD1a, CD1c, and CD1d were all expressed on CD11c(HI) dMϕ, a pattern differing from those previously observed. Exposure of peripheral monocytes and dendritic cells to lipid isolates from decidua led to increased surface CD1a levels only. The CD1a and CD1c on dMϕ were able to present the appropriate lipid antigens to lipid antigen-specific T cells. Finally, autoreactivity of decidual T cells to CD1a was observed. CONCLUSION The unique pattern of expression of CD1 isoforms on CD11c(HI) dMϕ is consistent with organ-specific roles of CD1 in human T-cell responses. dMϕ are able to present lipid antigens to both peripheral and decidual T cells and are major antigen-presenting cells in human decidua.
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Affiliation(s)
- Leigh Guerin
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
| | - Vernon Wu
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
| | - Brandy Houser
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
| | - Tamara Tilburgs
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
| | - Annemieke de Jong
- Division of Rheumatology, Immunology, and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - D Branch Moody
- Division of Rheumatology, Immunology, and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Jack L Strominger
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
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132
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Abstract
For decades, proteins were thought to be the sole or at least the dominant source of antigens for T cells. Studies in the 1990s demonstrated that CD1 proteins and mycobacterial lipids form specific targets of human αβ T cells. The molecular basis by which T-cell receptors (TCRs) recognize CD1-lipid complexes is now well understood. Many types of mycobacterial lipids function as antigens in the CD1 system, and new studies done with CD1 tetramers identify T-cell populations in the blood of tuberculosis patients. In human populations, a fundamental difference between the CD1 and major histocompatibility complex systems is that all humans express nearly identical CD1 proteins. Correspondingly, human CD1 responsive T cells show evidence of conserved TCRs. In addition to natural killer T cells and mucosal-associated invariant T (MAIT cells), conserved TCRs define other subsets of human T cells, including germline-encoded mycolyl-reactive (GEM) T cells. The simple immunogenetics of the CD1 system and new investigative tools to measure T-cell responses in humans now creates a situation in which known lipid antigens can be developed as immunodiagnostic and immunotherapeutic reagents for tuberculosis disease.
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Affiliation(s)
- Ildiko Van Rhijn
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA; Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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133
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Bourgeois EA, Subramaniam S, Cheng TY, De Jong A, Layre E, Ly D, Salimi M, Legaspi A, Modlin RL, Salio M, Cerundolo V, Moody DB, Ogg G. Bee venom processes human skin lipids for presentation by CD1a. J Exp Med 2015; 212:149-63. [PMID: 25584012 PMCID: PMC4322046 DOI: 10.1084/jem.20141505] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 12/11/2014] [Indexed: 12/31/2022] Open
Abstract
Venoms frequently co-opt host immune responses, so study of their mode of action can provide insight into novel inflammatory pathways. Using bee and wasp venom responses as a model system, we investigated whether venoms contain CD1-presented antigens. Here, we show that venoms activate human T cells via CD1a proteins. Whereas CD1 proteins typically present lipids, chromatographic separation of venoms unexpectedly showed that stimulatory factors partition into protein-containing fractions. This finding was explained by demonstrating that bee venom-derived phospholipase A2 (PLA2) activates T cells through generation of small neoantigens, such as free fatty acids and lysophospholipids, from common phosphodiacylglycerides. Patient studies showed that injected PLA2 generates lysophospholipids within human skin in vivo, and polyclonal T cell responses are dependent on CD1a protein and PLA2. These findings support a previously unknown skin immune response based on T cell recognition of CD1a proteins and lipid neoantigen generated in vivo by phospholipases. The findings have implications for skin barrier sensing by T cells and mechanisms underlying phospholipase-dependent inflammatory skin disease.
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Affiliation(s)
- Elvire A Bourgeois
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02114
| | - Sumithra Subramaniam
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine and University of Oxford NIHR Biomedical Research Centre, Oxford, Oxfordshire OX3 9DS, England, UK MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine and University of Oxford NIHR Biomedical Research Centre, Oxford, Oxfordshire OX3 9DS, England, UK
| | - Tan-Yun Cheng
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02114
| | - Annemieke De Jong
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02114
| | - Emilie Layre
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02114
| | - Dalam Ly
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02114
| | - Maryam Salimi
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine and University of Oxford NIHR Biomedical Research Centre, Oxford, Oxfordshire OX3 9DS, England, UK MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine and University of Oxford NIHR Biomedical Research Centre, Oxford, Oxfordshire OX3 9DS, England, UK
| | - Annaliza Legaspi
- Division of Dermatology, David Geffen School of Medicine, Department of Microbiology, Immunology and Molecular Genetics, University of California Los Angeles, Los Angeles, CA 90095 Division of Dermatology, David Geffen School of Medicine, Department of Microbiology, Immunology and Molecular Genetics, University of California Los Angeles, Los Angeles, CA 90095
| | - Robert L Modlin
- Division of Dermatology, David Geffen School of Medicine, Department of Microbiology, Immunology and Molecular Genetics, University of California Los Angeles, Los Angeles, CA 90095 Division of Dermatology, David Geffen School of Medicine, Department of Microbiology, Immunology and Molecular Genetics, University of California Los Angeles, Los Angeles, CA 90095
| | - Mariolina Salio
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine and University of Oxford NIHR Biomedical Research Centre, Oxford, Oxfordshire OX3 9DS, England, UK MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine and University of Oxford NIHR Biomedical Research Centre, Oxford, Oxfordshire OX3 9DS, England, UK
| | - Vincenzo Cerundolo
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine and University of Oxford NIHR Biomedical Research Centre, Oxford, Oxfordshire OX3 9DS, England, UK MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine and University of Oxford NIHR Biomedical Research Centre, Oxford, Oxfordshire OX3 9DS, England, UK
| | - D Branch Moody
- Division of Rheumatology, Immunology and Allergy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, 02114
| | - Graham Ogg
- MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine and University of Oxford NIHR Biomedical Research Centre, Oxford, Oxfordshire OX3 9DS, England, UK MRC Human Immunology Unit, Weatherall Institute of Molecular Medicine and University of Oxford NIHR Biomedical Research Centre, Oxford, Oxfordshire OX3 9DS, England, UK
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134
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Abstract
During the last decade, the field of T cell immunology started to confuse the scientific community. More and more subtypes of T helper cells and their counterparts in the innate immune system are described. We are just at the beginning to understand which specific function the distinct subtypes fulfill. Th22 cells are terminally differentiated and very specialized T helper cells characterized by the secretion of their signature cytokine IL-22 and lack of IL-4, IL-17 and IFN-γ. The main function of Th22 cells is to protect epithelial barrier organs such as skin and lung, but also to modulate inflamed and injured tissue. This review summarizes our current knowledge on Th22 cells and their function in allergic disease. Cite this as Eyerich K, Eyerich S. Th22 cells in allergic disease. Allergo J Int 2015;24:1–7 DOI: 10.1007/s40629-015-0039-3
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135
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Birkinshaw RW, Pellicci DG, Cheng TY, Keller AN, Sandoval-Romero M, Gras S, de Jong A, Uldrich AP, Moody DB, Godfrey DI, Rossjohn J. αβ T cell antigen receptor recognition of CD1a presenting self lipid ligands. Nat Immunol 2015; 16:258-66. [PMID: 25642819 DOI: 10.1038/ni.3098] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 01/06/2015] [Indexed: 12/15/2022]
Abstract
A central paradigm in αβ T cell-mediated immunity is the simultaneous co-recognition of antigens and antigen-presenting molecules by the αβ T cell antigen receptor (TCR). CD1a presents a broad repertoire of lipid-based antigens. We found that a prototypical autoreactive TCR bound CD1a when it was presenting a series of permissive endogenous ligands, while other lipid ligands were nonpermissive to TCR binding. The structures of two TCR-CD1a-lipid complexes showed that the TCR docked over the A' roof of CD1a in a manner that precluded direct contact with permissive ligands. Nonpermissive ligands indirectly inhibited TCR binding by disrupting the TCR-CD1a contact zone. The exclusive recognition of CD1a by the TCR represents a previously unknown mechanism whereby αβ T cells indirectly sense self antigens that are bound to an antigen-presenting molecule.
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Affiliation(s)
- Richard W Birkinshaw
- 1] Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Australia. [2] ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Australia
| | - Daniel G Pellicci
- 1] Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Australia. [2] ARC Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Australia
| | - Tan-Yun Cheng
- Brigham and Women's Hospital Division of Rheumatology, Immunology and Allergy and Harvard Medical School, Boston, Massachusetts, USA
| | - Andrew N Keller
- 1] Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Australia. [2] ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Australia
| | - Maria Sandoval-Romero
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Australia
| | - Stephanie Gras
- 1] Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Australia. [2] ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Australia
| | - Annemieke de Jong
- Department of Dermatology, Columbia University, New York, New York, USA
| | - Adam P Uldrich
- 1] Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Australia. [2] ARC Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Australia
| | - D Branch Moody
- Brigham and Women's Hospital Division of Rheumatology, Immunology and Allergy and Harvard Medical School, Boston, Massachusetts, USA
| | - Dale I Godfrey
- 1] Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Australia. [2] ARC Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Australia
| | - Jamie Rossjohn
- 1] Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Australia. [2] ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Australia. [3] Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff, UK
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136
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Eyerich K, Eyerich S. Th22-Zellen bei allergischen Erkrankungen. ALLERGO JOURNAL 2015. [DOI: 10.1007/s15007-015-0750-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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137
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Klechevsky E. Functional Diversity of Human Dendritic Cells. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2015; 850:43-54. [PMID: 26324345 DOI: 10.1007/978-3-319-15774-0_4] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
At the crossroad between innate and adaptive immunity are the dendritic Cells (DCs), a "novel cell type." discovered in 1973 by Ralph Steinman. Although not entirely appreciated at first, it is clear that they play a critical role as specialized antigen-presenting cells and essential mediators in shaping immune reactivity and tolerance. Dendritic cells are now recognized as a heterogeneous group of cells in terms of cell-surface markers, anatomic location, and function adapted to protect against an array of pathogens and conditions. Importantly, these subsets are also unique to each species. While significant progress has been made on the identification and function of mouse DC subsets, much less is known about human cells. Here we review the fascinating biology of human skin DCs and describe tolerogenic principles that are critical in maintaining immune homeostasis and for controlling inflammation, as well as mechanisms that are fundamental to confer immunity. We surmise that these principles could be applied to DCs across organs, and could be harnessed for the treatment of various human autoimmune, inflammatory diseases, as well as cancer. Importantly, to leverage the relevance of basic research to the clinical setting, it is first necessary to determine the functional homology between mouse and human DCs. We discuss practical steps towards this aim.
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138
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Paquin-Proulx D, Sandberg JK. Persistent Immune Activation in CVID and the Role of IVIg in Its Suppression. Front Immunol 2014; 5:637. [PMID: 25566250 PMCID: PMC4267274 DOI: 10.3389/fimmu.2014.00637] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 11/28/2014] [Indexed: 01/31/2023] Open
Abstract
Common variable immunodeficiency (CVID) is one of the most common and clinically important primary immune deficiencies. CVID patients have poor humoral immunity, resulting in recurrent infections of the gastrointestinal and upper respiratory tracts, as well as increased incidence of some forms of cancers and autoimmune diseases. The treatment for CVID is IgG replacement, often given as intravenous immunoglobulins (IVIg). IVIg consists of monomeric IgG purified from pooled plasma from healthy donors and is used to treat an increasing number of conditions including autoimmune diseases. In the case of CVID, IVIg has mainly been seen as reconstitution therapy, providing patients with pathogen-specific antibodies. Recent evidence shows that IVIg has diverse effects on the immune system of CVID patients, and one important component is that IVIg alleviates the state of chronic immune activation. In this review, we will discuss causes and consequences of persistent immune activation in CVID, possible underlying mechanisms for how IVIg treatment reduces immune activation, and implications for our understanding of primary as well as acquired immune deficiencies.
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Affiliation(s)
- Dominic Paquin-Proulx
- Department of Medicine, Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital , Stockholm , Sweden
| | - Johan K Sandberg
- Department of Medicine, Center for Infectious Medicine, Karolinska Institutet, Karolinska University Hospital , Stockholm , Sweden
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139
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Goyal A, Moore JB, Gimbel D, Carter JB, Kroshinsky D, Ferry JA, Harris NL, Duncan LM. PD-1, S-100 and CD1a expression in pseudolymphomatous folliculitis, primary cutaneous marginal zone B-cell lymphoma (MALT lymphoma) and cutaneous lymphoid hyperplasia. J Cutan Pathol 2014; 42:6-15. [PMID: 25384543 DOI: 10.1111/cup.12440] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2014] [Revised: 09/11/2014] [Accepted: 10/12/2014] [Indexed: 12/21/2022]
Abstract
BACKGROUND Pseudolymphomatous folliculitis is a lymphoid proliferation that clinically and histopathologically mimics primary cutaneous extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (MALT lymphoma). In this study, we assessed the diagnostic value of three immunohistochemical markers, programmed death-1 (PD-1), CD1a and S100. METHODS We evaluated 25 cases of cutaneous lymphoid proliferations with established diagnoses, including 9 patients with pseudolymphomatous folliculitis, 11 with MALT lymphoma, and 5 with cutaneous lymphoid hyperplasia (CLH). The clinical, histopathologic and immunohistochemical characteristics were reviewed and three major characteristics assessed: (a) proportion of T cells expressing PD-1, (b) pattern of expression of CD1a by dendritic cells and (c) pattern of expression of S100 by dendritic cells. RESULTS We found pseudolymphomatous folliculitis to have a significant increase in PD-1+ T cells compared with MALT lymphoma (p < 0.0001). The pattern of CD1a staining is also informative: MALT lymphoma is significantly more likely to demonstrate a peripheral concentration of CD1a+ dendritic cells around lymphoid nodules than pseudolymphomatous folliculitis (p < 0.0003) or CLH (p < 0.05). Pseudolymphomatous folliculitis demonstrates an interstitial distribution of CD1a+ cells more often than MALT lymphoma (p < 0.04). S100 staining was not a helpful discriminator. CONCLUSIONS Histopathologic factors including PD-1 and CD1a staining patterns may allow for more certainty in distinguishing lymphoid hyperplasia, including pseudolymphomatous folliculitis, from MALT lymphoma.
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Affiliation(s)
- Amrita Goyal
- Dermatopathology Unit, Massachusetts General Hospital, Boston, MA, USA
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140
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Luoma AM, Castro CD, Adams EJ. γδ T cell surveillance via CD1 molecules. Trends Immunol 2014; 35:613-621. [PMID: 25283967 PMCID: PMC4383740 DOI: 10.1016/j.it.2014.09.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2014] [Revised: 09/03/2014] [Accepted: 09/04/2014] [Indexed: 12/15/2022]
Abstract
γδ T cells are a prominent epithelial-resident lymphocyte population, possessing multi-functional capacities in the repair of host tissue, pathogen clearance, and tumor surveillance. Although three decades have now passed since their discovery, the nature of γδ T cell receptor (TCR)-mediated ligand recognition remains poorly defined. Recent studies have provided structural insight into this recognition, demonstrating that γδ T cells survey both CD1 and the presented lipid, and in some cases are exquisitely lipid specific. We review these findings here, examining the molecular basis for and the functional relevance of this interaction. We discuss potential implications on the notion that non-classical major histocompatibility complex (MHC) molecules may function as important restricting elements of γδ TCR specificity, and on our understanding of γδ T cell activation and function.
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Affiliation(s)
- Adrienne M Luoma
- Committee on Immunology and Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA
| | - Caitlin D Castro
- Committee on Immunology and Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA
| | - Erin J Adams
- Committee on Immunology and Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA.
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141
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Rutz S, Wang X, Ouyang W. The IL-20 subfamily of cytokines--from host defence to tissue homeostasis. Nat Rev Immunol 2014; 14:783-95. [PMID: 25421700 DOI: 10.1038/nri3766] [Citation(s) in RCA: 251] [Impact Index Per Article: 25.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The interleukin-20 (IL-20) subfamily of cytokines comprises IL-19, IL-20, IL-22, IL-24 and IL-26. These cytokines are all members of the larger IL-10 family, but have been grouped together to form the IL-20 subfamily based on their usage of common receptor subunits and similarities in their target-cell profiles and biological functions. Members of the IL-20 subfamily facilitate the communication between leukocytes and epithelial cells, thereby enhancing innate defence mechanisms and tissue repair processes at epithelial surfaces. In this Review, we describe the cellular sources and targets of the IL-20 subfamily cytokines, and we detail how their expression is regulated. Much of our understanding of the unique biology of this group of cytokines is still based on IL-22, which is the most studied member of the IL-20 subfamily. Nevertheless, we attempt a broader discussion of the emerging functions of IL-20 subfamily cytokines in host defence, inflammatory diseases, cancer and metabolism.
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Affiliation(s)
- Sascha Rutz
- Department of Immunology, Genentech, South San Francisco, California 94080, USA
| | - Xiaoting Wang
- Department of Immunology, Genentech, South San Francisco, California 94080, USA
| | - Wenjun Ouyang
- Department of Immunology, Genentech, South San Francisco, California 94080, USA
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142
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Layre E, de Jong A, Moody DB. Human T cells use CD1 and MR1 to recognize lipids and small molecules. Curr Opin Chem Biol 2014; 23:31-8. [DOI: 10.1016/j.cbpa.2014.09.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 08/28/2014] [Accepted: 09/10/2014] [Indexed: 12/13/2022]
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143
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Kim TG, Kim DS, Kim HP, Lee MG. The pathophysiological role of dendritic cell subsets in psoriasis. BMB Rep 2014; 47:60-8. [PMID: 24411465 PMCID: PMC4163895 DOI: 10.5483/bmbrep.2014.47.2.014] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Indexed: 12/17/2022] Open
Abstract
Psoriasis is a chronic inflammatory disorder characterized by an erythematous scaly plaque of the skin and is occasionally accompanied by systemic complications. In the psoriatic lesions, an increased number of cytokine-producing dendritic cells and activated T cells are observed, which indicate that psoriasis is a prototype of an immune-mediated dermatosis. During the last decade, emerging studies demonstrate novel roles for the dendritic cell subsets in the process of disease initiation and maintenance of psoriasis. In addition, recently discovered anti-psoriatic therapies, which specifically target inflammatory cytokines produced by lesional dendritic cells, bring much better clinical improvement compared to conventional treatments. These new therapies implicate the crucial importance of dendritic cells in psoriasis pathogenesis. This review will summarize and discuss the dendritic cell subsets of the human skin and their pathophysiological involvement in psoriasis based on mouse- and patient-oriented studies. [BMB Reports 2014; 47(2): 60-68]
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Affiliation(s)
- Tae-Gyun Kim
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea; Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Dae Suk Kim
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Hyoung-Pyo Kim
- Department of Environmental Medical Biology, Institute of Tropical Medicine, Yonsei University College of Medicine, Seoul 120-752, Korea
| | - Min-Geol Lee
- Department of Dermatology and Cutaneous Biology Research Institute, Yonsei University College of Medicine, Seoul 120-752, Korea; Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Seoul 120-752, Korea
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144
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The CD1 size problem: lipid antigens, ligands, and scaffolds. Cell Mol Life Sci 2014; 71:3069-79. [PMID: 24658584 DOI: 10.1007/s00018-014-1603-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 02/10/2014] [Accepted: 03/06/2014] [Indexed: 01/17/2023]
Abstract
Whereas research on CD1d has emphasized a few glycosyl ceramides, the broader family of four human CD1 antigen-presenting molecules binds hundreds of distinct self-lipids. Individual lipid types bind within CD1 grooves in different ways, such that they partially fill the groove, match the groove volume, or protrude substantially from the groove. These differing modes of binding can now be connected to differing immunological functions, as individual lipids can act as stimulatory antigens, inhibitory ligands, or space-filling scaffolds. Because each type of CD1 protein folds to produce antigen-binding grooves with differing sizes and shapes, CD1a, CD1b, CD1c, CD1d, and CD1e have distinct mechanisms of capturing self-lipids and exchanging them for foreign lipids. The size discrepancy between endogeneous lipids and groove volume is most pronounced for CD1b. Recent studies show that the large CD1b cavity can simultaneously bind two self-lipids, the antigen, and its scaffold lipid, which can be exchanged for one large bacterial lipid. In this review, we will highlight recent studies showing how cells regulate lipid antigen loading and the roles CD1 groove structures have in control of the presentation of chemically diverse lipids to T cells.
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145
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Lepore M, de Lalla C, Gundimeda SR, Gsellinger H, Consonni M, Garavaglia C, Sansano S, Piccolo F, Scelfo A, Häussinger D, Montagna D, Locatelli F, Bonini C, Bondanza A, Forcina A, Li Z, Ni G, Ciceri F, Jenö P, Xia C, Mori L, Dellabona P, Casorati G, De Libero G. A novel self-lipid antigen targets human T cells against CD1c(+) leukemias. ACTA ACUST UNITED AC 2014; 211:1363-77. [PMID: 24935257 PMCID: PMC4076585 DOI: 10.1084/jem.20140410] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
T cells that recognize self-lipids presented by CD1c are frequent in the peripheral blood of healthy individuals and kill transformed hematopoietic cells, but little is known about their antigen specificity and potential antileukemia effects. We report that CD1c self-reactive T cells recognize a novel class of self-lipids, identified as methyl-lysophosphatidic acids (mLPAs), which are accumulated in leukemia cells. Primary acute myeloid and B cell acute leukemia blasts express CD1 molecules. mLPA-specific T cells efficiently kill CD1c(+) acute leukemia cells, poorly recognize nontransformed CD1c-expressing cells, and protect immunodeficient mice against CD1c(+) human leukemia cells. The identification of immunogenic self-lipid antigens accumulated in leukemia cells and the observed leukemia control by lipid-specific T cells in vivo provide a new conceptual framework for leukemia immune surveillance and possible immunotherapy.
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Affiliation(s)
- Marco Lepore
- Experimental Immunology, Department of Biomedicine, University Hospital Basel; Nuclear Magnetic Resonance Laboratory, Department of Chemistry; and Department of Biochemistry, Biozentrum; University of Basel, 4056 Basel, Switzerland Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Claudia de Lalla
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - S Ramanjaneyulu Gundimeda
- Experimental Immunology, Department of Biomedicine, University Hospital Basel; Nuclear Magnetic Resonance Laboratory, Department of Chemistry; and Department of Biochemistry, Biozentrum; University of Basel, 4056 Basel, Switzerland
| | - Heiko Gsellinger
- Experimental Immunology, Department of Biomedicine, University Hospital Basel; Nuclear Magnetic Resonance Laboratory, Department of Chemistry; and Department of Biochemistry, Biozentrum; University of Basel, 4056 Basel, Switzerland
| | - Michela Consonni
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Claudio Garavaglia
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Sebastiano Sansano
- Experimental Immunology, Department of Biomedicine, University Hospital Basel; Nuclear Magnetic Resonance Laboratory, Department of Chemistry; and Department of Biochemistry, Biozentrum; University of Basel, 4056 Basel, Switzerland
| | - Francesco Piccolo
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Andrea Scelfo
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Daniel Häussinger
- Experimental Immunology, Department of Biomedicine, University Hospital Basel; Nuclear Magnetic Resonance Laboratory, Department of Chemistry; and Department of Biochemistry, Biozentrum; University of Basel, 4056 Basel, Switzerland
| | - Daniela Montagna
- Laboratorio di Immunologia, Dipartimento di Pediatria, Università di Pavia and Fondazione IRCCS Policlinico San Matteo, 27100 Pavia, Italy
| | - Franco Locatelli
- Department of Pediatric Hematology-Oncology, IRCCS Bambino Gesù Hospital, 00165 Rome, Italy
| | - Chiara Bonini
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Attilio Bondanza
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Alessandra Forcina
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Zhiyuan Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Guanghui Ni
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Fabio Ciceri
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Paul Jenö
- Experimental Immunology, Department of Biomedicine, University Hospital Basel; Nuclear Magnetic Resonance Laboratory, Department of Chemistry; and Department of Biochemistry, Biozentrum; University of Basel, 4056 Basel, Switzerland
| | - Chengfeng Xia
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Lucia Mori
- Experimental Immunology, Department of Biomedicine, University Hospital Basel; Nuclear Magnetic Resonance Laboratory, Department of Chemistry; and Department of Biochemistry, Biozentrum; University of Basel, 4056 Basel, Switzerland Singapore Immunology Network (SIgN), Agency for Science, Technology, and Research, Singapore 138648
| | - Paolo Dellabona
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Giulia Casorati
- Experimental Immunology Unit, Division of Immunology, Transplantation, and Infectious Diseases, Experimental Hematology Unit, and Bone Marrow Transplantation Unit, San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Gennaro De Libero
- Experimental Immunology, Department of Biomedicine, University Hospital Basel; Nuclear Magnetic Resonance Laboratory, Department of Chemistry; and Department of Biochemistry, Biozentrum; University of Basel, 4056 Basel, Switzerland Singapore Immunology Network (SIgN), Agency for Science, Technology, and Research, Singapore 138648
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146
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Zhao J, Bagchi S, Wang CR. Type II natural killer T cells foster the antitumor activity of CpG-oligodeoxynucleotides. Oncoimmunology 2014; 3:e28977. [PMID: 25057452 PMCID: PMC4091550 DOI: 10.4161/onci.28977] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2014] [Accepted: 04/23/2014] [Indexed: 01/15/2023] Open
Abstract
Type II natural killer T (NKT) cells in cancer immunity are typically associated with suppression of tumor immunosurveillance through secretion of IL-13. We previously demonstrated that CpG oligonucleotide therapy activated Type II NKT cells to produce T helper type 1 (Th1) rather than T helper type 2 (Th2) cytokines. This cytokine skewing may manifest in Type II NKT cell antitumor properties in an immunotherapeutic setting.
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Affiliation(s)
- Jie Zhao
- Department of Microbiology and Immunology; Feinberg School of Medicine; Northwestern University; Chicago, IL USA
| | - Sreya Bagchi
- Department of Microbiology and Immunology; Feinberg School of Medicine; Northwestern University; Chicago, IL USA
| | - Chyung-Ru Wang
- Department of Microbiology and Immunology; Feinberg School of Medicine; Northwestern University; Chicago, IL USA
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147
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Li W, Liu J, Zhao Y. PKM2 inhibitor shikonin suppresses TPA-induced mitochondrial malfunction and proliferation of skin epidermal JB6 cells. Mol Carcinog 2014; 53:403-12. [PMID: 23255458 PMCID: PMC4827433 DOI: 10.1002/mc.21988] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 11/09/2012] [Accepted: 11/09/2012] [Indexed: 11/10/2022]
Abstract
Chemoprevention has been a pivotal and effective strategy during the skin cancer treatment. Using human skin normal and tumor samples, we demonstrated that both the expression and activity levels of pyruvate kinase M2 (PKM2) were higher in skin tumor tissues than normal tissues, suggesting that PKM2, one of important metabolic enzyme, might serve as a target for skin cancer prevention and/or therapy. Shikonin, a small-molecule active chemical, has been studied as an anti-cancer drug candidate in human cancer models. However, the mechanism of action and the chemopreventive potential of shikonin are unclear. Herein, we used the skin epidermal JB6 P+ cells and demonstrated that shikonin suppressed the tumor promoter 12-O-tetradecanoylphorbol 13-acetate (TPA) induced neoplastic cell transformation and PKM2 activation in the early stage of carcinogenesis. Mitochondrial functions were inhibited by TPA treatment, as indicated by reduced mitochondrial membrane potential and mitochondrial respiration, which were restored by shikonin. We also examined the levels of lactate as a glycolysis marker, and shikonin suppressed its increase caused by tumor promoter treatment. Modulation of cell metabolism by shikonin was associated with G2-M phase accumulation, and Fra-1 (a major subunit of activator protein 1 in skin tumorigenesis) downregulation. In addition, we demonstrated that AMP-activated protein kinase (AMPK), an energy sensor, which is inactivated by TPA, shikonin could reverse AMPK activity. These results suggest that shikonin bears chemopreventive potential for human skin cancers in which PKM2 is upregulated, which might be mediated by inhibiting oncogenic activation, PKM2 activation, and mitochondrial dysfunction.
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Affiliation(s)
- Wenjuan Li
- Department of Pharmacology, Toxicology & Neuroscience, LSU Health Sciences Center in Shreveport, Shreveport, Louisiana
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148
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149
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Van Rhijn I, Gherardin NA, Kasmar A, de Jager W, Pellicci DG, Kostenko L, Tan LL, Bhati M, Gras S, Godfrey DI, Rossjohn J, Moody DB. TCR bias and affinity define two compartments of the CD1b-glycolipid-specific T Cell repertoire. THE JOURNAL OF IMMUNOLOGY 2014; 192:4054-60. [PMID: 24683194 DOI: 10.4049/jimmunol.1400158] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Current views emphasize TCR diversity as a key feature that differentiates the group 1 (CD1a, CD1b, CD1c) and group 2 (CD1d) CD1 systems. Whereas TCR sequence motifs define CD1d-reactive NKT cells, the available data do not allow a TCR-based organization of the group 1 CD1 repertoire. The observed TCR diversity might result from donor-to-donor differences in TCR repertoire, as seen for MHC-restricted T cells. Alternatively, diversity might result from differing CD1 isoforms, Ags, and methods used to identify TCRs. Using CD1b tetramers to isolate clones recognizing the same glycolipid, we identified a previously unknown pattern of V gene usage (TRAV17, TRBV4-1) among unrelated human subjects. These TCRs are distinct from those present on NKT cells and germline-encoded mycolyl lipid-reactive T cells. Instead, they resemble the TCR of LDN5, one of the first known CD1b-reactive clones that was previously thought to illustrate the diversity of the TCR repertoire. Interdonor TCR conservation was observed in vitro and ex vivo, identifying LDN5-like T cells as a distinct T cell type. These data support TCR-based organization of the CD1b repertoire, which consists of at least two compartments that differ in TCR sequence motifs, affinity, and coreceptor expression.
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Affiliation(s)
- Ildiko Van Rhijn
- Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
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150
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de Jong A, Cheng TY, Huang S, Gras S, Birkinshaw RW, Kasmar A, van Rhijn I, Peña-Cruz V, Ruan DT, Altman JD, Rossjohn J, Moody DB. CD1a-autoreactive T cells recognize natural skin oils that function as headless antigens. Nat Immunol 2014; 15:177-85. [PMID: 24362891 PMCID: PMC3932764 DOI: 10.1038/ni.2790] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2013] [Accepted: 11/18/2013] [Indexed: 01/11/2023]
Abstract
T cells autoreactive to the antigen-presenting molecule CD1a are common in human blood and skin, but the search for natural autoantigens has been confounded by background T cell responses to CD1 proteins and self lipids. After capturing CD1a-lipid complexes, we gently eluted ligands while preserving non-ligand-bound CD1a for testing lipids from tissues. CD1a released hundreds of ligands of two types. Inhibitory ligands were ubiquitous membrane lipids with polar head groups, whereas stimulatory compounds were apolar oils. We identified squalene and wax esters, which naturally accumulate in epidermis and sebum, as autoantigens presented by CD1a. The activation of T cells by skin oils suggested that headless mini-antigens nest within CD1a and displace non-antigenic resident lipids with large head groups. Oily autoantigens naturally coat the surface of the skin; thus, this points to a previously unknown mechanism of barrier immunity.
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Affiliation(s)
| | | | | | - Stephanie Gras
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Australia
| | - Richard W. Birkinshaw
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Australia
| | - Anne Kasmar
- Division of Rheumatology, Immunology and Allergy
| | - Ildiko van Rhijn
- Division of Rheumatology, Immunology and Allergy
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | | | - Daniel T. Ruan
- Department of Gastrointestinal and General Surgery, Brigham and Women’s Hospital, Harvard Medical School
| | | | - Jamie Rossjohn
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Australia
- Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff CF14 4XN, UK
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