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Vacchini A, Chancellor A, Yang Q, Colombo R, Spagnuolo J, Berloffa G, Joss D, Øyås O, Lecchi C, De Simone G, Beshirova A, Nosi V, Loureiro JP, Morabito A, De Gregorio C, Pfeffer M, Schaefer V, Prota G, Zippelius A, Stelling J, Häussinger D, Brunelli L, Villalta P, Lepore M, Davoli E, Balbo S, Mori L, De Libero G. Nucleobase adducts bind MR1 and stimulate MR1-restricted T cells. Sci Immunol 2024; 9:eadn0126. [PMID: 38728413 DOI: 10.1126/sciimmunol.adn0126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 04/18/2024] [Indexed: 05/12/2024]
Abstract
MR1T cells are a recently found class of T cells that recognize antigens presented by the major histocompatibility complex-I-related molecule MR1 in the absence of microbial infection. The nature of the self-antigens that stimulate MR1T cells remains unclear, hampering our understanding of their physiological role and therapeutic potential. By combining genetic, pharmacological, and biochemical approaches, we found that carbonyl stress and changes in nucleobase metabolism in target cells promote MR1T cell activation. Stimulatory compounds formed by carbonyl adducts of nucleobases were detected within MR1 molecules produced by tumor cells, and their abundance and antigenicity were enhanced by drugs that induce carbonyl accumulation. Our data reveal carbonyl-nucleobase adducts as MR1T cell antigens. Recognizing cells under carbonyl stress allows MR1T cells to monitor cellular metabolic changes with physiological and therapeutic implications.
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Affiliation(s)
- Alessandro Vacchini
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Andrew Chancellor
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Qinmei Yang
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Rodrigo Colombo
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Julian Spagnuolo
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Giuliano Berloffa
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Daniel Joss
- Department of Chemistry, University of Basel, Basel 4056, Switzerland
| | - Ove Øyås
- Department of Biosystems Science and Engineering and SIB Swiss Institute of Bioinformatics, ETH Zurich, Basel 4058, Switzerland
| | - Chiara Lecchi
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
| | - Giulia De Simone
- Department of Environmental Health Science, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milano 20156, Italy
| | - Aisha Beshirova
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Vladimir Nosi
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - José Pedro Loureiro
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Aurelia Morabito
- Department of Environmental Health Science, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milano 20156, Italy
| | - Corinne De Gregorio
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Michael Pfeffer
- Department of Chemistry, University of Basel, Basel 4056, Switzerland
| | - Verena Schaefer
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Gennaro Prota
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Alfred Zippelius
- Cancer Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Jörg Stelling
- Department of Biosystems Science and Engineering and SIB Swiss Institute of Bioinformatics, ETH Zurich, Basel 4058, Switzerland
| | - Daniel Häussinger
- Department of Chemistry, University of Basel, Basel 4056, Switzerland
| | - Laura Brunelli
- Department of Environmental Health Science, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milano 20156, Italy
| | - Peter Villalta
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
- Department of Medicinal Chemistry, University of Minnesota, Minneapolis, MN 55455, USA
| | - Marco Lepore
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Enrico Davoli
- Department of Environmental Health Science, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Milano 20156, Italy
| | - Silvia Balbo
- Masonic Cancer Center, University of Minnesota, Minneapolis, MN 55455, USA
| | - Lucia Mori
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
| | - Gennaro De Libero
- Experimental Immunology, Department of Biomedicine, University Hospital and University of Basel, Basel 4031, Switzerland
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2
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Maerz MD, Cross DL, Seshadri C. Functional and biological implications of clonotypic diversity among human donor-unrestricted T cells. Immunol Cell Biol 2024. [PMID: 38659280 DOI: 10.1111/imcb.12751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 02/04/2024] [Accepted: 04/04/2024] [Indexed: 04/26/2024]
Abstract
T cells express a T-cell receptor (TCR) heterodimer that is the product of germline rearrangement and junctional editing resulting in immense clonotypic diversity. The generation of diverse TCR repertoires enables the recognition of pathogen-derived peptide antigens presented by polymorphic major histocompatibility complex (MHC) molecules. However, T cells also recognize nonpeptide antigens through nearly monomorphic antigen-presenting systems, such as cluster of differentiation 1 (CD1), MHC-related protein 1 (MR1) and butyrophilins (BTNs). This potential for shared immune responses across genetically diverse populations led to their designation as donor-unrestricted T cells (DURTs). As might be expected, some CD1-, MR1- and BTN-restricted T cells express a TCR that is conserved across unrelated individuals. However, several recent studies have reported unexpected diversity among DURT TCRs, and increasing evidence suggests that this diversity has functional consequences. Recent reports also challenge the dogma that immune cells are either innate or adaptive and suggest that DURT TCRs may act in both capacities. Here, we review this evidence and propose an expanded view of the role for clonotypic diversity among DURTs in humans, including new perspectives on how DURT TCRs may integrate their adaptive and innate immune functions.
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Affiliation(s)
- Megan D Maerz
- Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Molecular Medicine and Mechanisms of Disease Program, Department of Laboratory Medicine and Pathology, University of Washington, Seattle, WA, USA
| | - Deborah L Cross
- Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
| | - Chetan Seshadri
- Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
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3
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Bryan E, Teague JE, Eligul S, Arkins WC, Moody DB, Clark RA, Van Rhijn I. Human Skin T Cells Express Conserved T-Cell Receptors that Cross-React with Staphylococcal Superantigens and CD1a. J Invest Dermatol 2024; 144:833-843.e3. [PMID: 37951348 DOI: 10.1016/j.jid.2023.09.284] [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: 03/29/2023] [Revised: 09/06/2023] [Accepted: 09/30/2023] [Indexed: 11/14/2023]
Abstract
Human Langerhans cells highly express CD1a antigen-presenting molecules. To understand the functions of CD1a in human skin, we used CD1a tetramers to capture T cells and determine their effector functions and TCR patterns. Skin T cells from all donors showed CD1a tetramer staining, which in three cases exceeded 10% of skin T cells. CD1a tetramer-positive T cells produced diverse cytokines, including IL-2, IL-4, IL-5, IL-9, IL-17, IL-22, and IFN-γ. Conserved TCRs often recognize nonpolymorphic antigen-presenting molecules, but no TCR motifs are known for CD1a. We detected highly conserved TCRs that used TRAV34 and TRBV28 variable genes, which is a known motif for recognition of staphylococcal enterotoxin B, a superantigen associated with atopic dermatitis. We found that these conserved TCRs did not respond to superantigen presented by CD1a, but instead showed a cross-reactive response with two targets: CD1a and staphylococcal enterotoxin B presented by classical major histocompatibility complex II. These studies identify a conserved human TCR motif for CD1a-reactive T cells. Furthermore, the demonstrated cross-reaction of T cells with two common skin-specific stimuli suggests a candidate mechanism by which CD1a and skin flora could synergize during natural immune response and in Staphylococcus-associated skin diseases.
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Affiliation(s)
- Elizabeth Bryan
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jessica E Teague
- Department of Dermatology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Sezin Eligul
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Wellington C Arkins
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - D Branch Moody
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Rachael A Clark
- Department of Dermatology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Ildiko Van Rhijn
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
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4
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Kobiela A, Hewelt-Belka W, Frąckowiak JE, Kordulewska N, Hovhannisyan L, Bogucka A, Etherington R, Piróg A, Dapic I, Gabrielsson S, Brown SJ, Ogg GS, Gutowska-Owsiak D. Keratinocyte-derived small extracellular vesicles supply antigens for CD1a-resticted T cells and promote their type 2 bias in the context of filaggrin insufficiency. Front Immunol 2024; 15:1369238. [PMID: 38585273 PMCID: PMC10995404 DOI: 10.3389/fimmu.2024.1369238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Accepted: 03/07/2024] [Indexed: 04/09/2024] Open
Abstract
Introduction Exosome-enriched small extracellular vesicles (sEVs) are nanosized organelles known to participate in long distance communication between cells, including in the skin. Atopic dermatitis (AD) is a chronic inflammatory skin disease for which filaggrin (FLG) gene mutations are the strongest genetic risk factor. Filaggrin insufficiency affects multiple cellular function, but it is unclear if sEV-mediated cellular communication originating from the affected keratinocytes is also altered, and if this influences peptide and lipid antigen presentation to T cells in the skin. Methods Available mRNA and protein expression datasets from filaggrin-insufficient keratinocytes (shFLG), organotypic models and AD skin were used for gene ontology analysis with FunRich tool. sEVs secreted by shFLG and control shC cells were isolated from conditioned media by differential centrifugation. Mass spectrometry was carried out for lipidomic and proteomic profiling of the cells and sEVs. T cell responses to protein, peptide, CD1a lipid antigens, as well as phospholipase A2-digested or intact sEVs were measured by ELISpot and ELISA. Results Data analysis revealed extensive remodeling of the sEV compartment in filaggrin insufficient keratinocytes, 3D models and the AD skin. Lipidomic profiles of shFLGsEV showed a reduction in the long chain (LCFAs) and polyunsaturated fatty acids (PUFAs; permissive CD1a ligands) and increased content of the bulky headgroup sphingolipids (non-permissive ligands). This resulted in a reduction of CD1a-mediated interferon-γ T cell responses to the lipids liberated from shFLG-generated sEVs in comparison to those induced by sEVs from control cells, and an increase in interleukin 13 secretion. The altered sEV lipidome reflected a generalized alteration in the cellular lipidome in filaggrin-insufficient cells and the skin of AD patients, resulting from a downregulation of key enzymes implicated in fatty acid elongation and desaturation, i.e., enzymes of the ACSL, ELOVL and FADS family. Discussion We determined that sEVs constitute a source of antigens suitable for CD1a-mediated presentation to T cells. Lipids enclosed within the sEVs secreted on the background of filaggrin insufficiency contribute to allergic inflammation by reducing type 1 responses and inducing a type 2 bias from CD1a-restricted T cells, thus likely perpetuating allergic inflammation in the skin.
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Affiliation(s)
- Adrian Kobiela
- Laboratory of Experimental and Translational Immunology, Intercollegiate Faculty of Biotechnology of the University of Gdańsk and the Medical University of Gdańsk, Gdańsk, Poland
| | - Weronika Hewelt-Belka
- Department of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, Gdańsk, Poland
| | - Joanna E. Frąckowiak
- Laboratory of Experimental and Translational Immunology, Intercollegiate Faculty of Biotechnology of the University of Gdańsk and the Medical University of Gdańsk, Gdańsk, Poland
| | - Natalia Kordulewska
- Department of Biochemistry, Faculty of Biology and Biotechnology, University of Warmia and Mazury, Olsztyn, Poland
| | - Lilit Hovhannisyan
- Laboratory of Experimental and Translational Immunology, Intercollegiate Faculty of Biotechnology of the University of Gdańsk and the Medical University of Gdańsk, Gdańsk, Poland
| | - Aleksandra Bogucka
- The Mass Spectrometry Laboratory, Intercollegiate Faculty of Biotechnology of University of Gdańsk and Medical University of Gdańsk, Gdańsk, Poland
| | - Rachel Etherington
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Artur Piróg
- International Centre for Cancer Vaccine Science, University of Gdańsk, Gdańsk, Poland
| | - Irena Dapic
- International Centre for Cancer Vaccine Science, University of Gdańsk, Gdańsk, Poland
| | - Susanne Gabrielsson
- Division of Immunology and Allergy, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Immunology and Transfusion Medicine, Karolinska University Hospital, Stockholm, Sweden
| | - Sara J. Brown
- Centre for Genomic and Experimental Medicine, Institute of Genetics and Cancer, University of Edinburgh, Edinburgh, United Kingdom
| | - Graham S. Ogg
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Danuta Gutowska-Owsiak
- Laboratory of Experimental and Translational Immunology, Intercollegiate Faculty of Biotechnology of the University of Gdańsk and the Medical University of Gdańsk, Gdańsk, Poland
- MRC Human Immunology Unit, NIHR Biomedical Research Centre, Radcliffe Department of Medicine, University of Oxford, Oxford, United Kingdom
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Huang S, Shahine A, Cheng TY, Chen YL, Ng SW, Balaji GR, Farquhar R, Gras S, Hardman CS, Altman JD, Tahiri N, Minnaard AJ, Ogg GS, Mayfield JA, Rossjohn J, Moody DB. CD1 lipidomes reveal lipid-binding motifs and size-based antigen-display mechanisms. Cell 2023; 186:4583-4596.e13. [PMID: 37725977 PMCID: PMC10591967 DOI: 10.1016/j.cell.2023.08.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 05/05/2023] [Accepted: 08/21/2023] [Indexed: 09/21/2023]
Abstract
The CD1 system binds lipid antigens for display to T cells. Here, we solved lipidomes for the four human CD1 antigen-presenting molecules, providing a map of self-lipid display. Answering a basic question, the detection of >2,000 CD1-lipid complexes demonstrates broad presentation of self-sphingolipids and phospholipids. Whereas peptide antigens are chemically processed, many lipids are presented in an unaltered form. However, each type of CD1 protein differentially edits the self-lipidome to show distinct capture motifs based on lipid length and chemical composition, suggesting general antigen display mechanisms. For CD1a and CD1d, lipid size matches the CD1 cleft volume. CD1c cleft size is more variable, and CD1b is the outlier, where ligands and clefts show an extreme size mismatch that is explained by uniformly seating two small lipids in one cleft. Furthermore, the list of compounds that comprise the integrated CD1 lipidome supports the ongoing discovery of lipid blockers and antigens for T cells.
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Affiliation(s)
- Shouxiong Huang
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Adam Shahine
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Tan-Yun Cheng
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Yi-Ling Chen
- Human Immunology Unit, Weatherall Institute for Molecular Medicine, University of Oxford, Headington, Oxford OX3 9DS, UK
- Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Soo Weei Ng
- Human Immunology Unit, Weatherall Institute for Molecular Medicine, University of Oxford, Headington, Oxford OX3 9DS, UK
| | - Gautham R. Balaji
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Rachel Farquhar
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Stephanie Gras
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Clare S. Hardman
- Human Immunology Unit, Weatherall Institute for Molecular Medicine, University of Oxford, Headington, Oxford OX3 9DS, UK
| | - John D. Altman
- Emory Vaccine Center, Emory School of Medicine, Atlanta, GA 30322, USA
| | - Nabil Tahiri
- Department of Chemical Biology, Stratingh Institute for Chemistry, Groningen, Netherlands
| | - Adriaan J. Minnaard
- Department of Chemical Biology, Stratingh Institute for Chemistry, Groningen, Netherlands
| | - Graham S. Ogg
- Human Immunology Unit, Weatherall Institute for Molecular Medicine, University of Oxford, Headington, Oxford OX3 9DS, UK
- Chinese Academy of Medical Sciences Oxford Institute, University of Oxford, Oxford, UK
| | - Jacob A. Mayfield
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia
- Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff CF14 4XN, UK
| | - D. Branch Moody
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA 02115, USA
- Lead contact
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6
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Ogg GS, Rossjohn J, Clark RA, Moody DB. CD1a and bound lipids drive T-cell responses in human skin disease. Eur J Immunol 2023; 53:e2250333. [PMID: 37539748 PMCID: PMC10592190 DOI: 10.1002/eji.202250333] [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: 03/19/2023] [Revised: 08/03/2023] [Accepted: 08/03/2023] [Indexed: 08/05/2023]
Abstract
In addition to serving as the main physical barrier with the outside world, human skin is abundantly infiltrated with resident αβ T cells that respond differently to self, infectious, microbiome, and noxious stimuli. To study skin T cells during infection and inflammation, experimental biologists track T-cell surface phenotypes and effector functions, which are often interpreted with the untested assumption that MHC proteins and peptide antigens drive measured responses. However, a broader perspective is that CD1 proteins also activate human T cells, and in skin, Langerhans cells (LCs) are abundant antigen presenting cells that express extremely high levels of CD1a. The emergence of new experimental tools, including CD1a tetramers carrying endogenous lipids, now show that CD1a-reactive T cells comprise a large population of resident T cells in human skin. Here, we review studies showing that skin-derived αβ T cells directly recognize CD1a proteins, and certain bound lipids, such as contact dermatitis allergens, trigger T-cell responses. Other natural skin lipids inhibit CD1a-mediated T-cell responses, providing an entry point for the development of therapeutic lipids that block T-cell responses. Increasing evidence points to a distinct role of CD1a in type 2 and 22 T-cell responses, providing new insights into psoriasis, contact dermatitis, and other T-cell-mediated skin diseases.
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Affiliation(s)
- Graham S. Ogg
- Medical Research Council Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff, UK
| | - Rachael A. Clark
- Department of Dermatology, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - D. Branch Moody
- Division of Rheumatology, Inflammation and Immunity, Department of Medicine, Brigham and Women’s Hospital and Harvard Medical School
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7
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Kim S, Cho S, Kim JH. CD1-mediated immune responses in mucosal tissues: molecular mechanisms underlying lipid antigen presentation system. Exp Mol Med 2023; 55:1858-1871. [PMID: 37696897 PMCID: PMC10545705 DOI: 10.1038/s12276-023-01053-6] [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: 02/28/2023] [Revised: 05/02/2023] [Accepted: 05/07/2023] [Indexed: 09/13/2023] Open
Abstract
The cluster of differentiation 1 (CD1) molecule differs from major histocompatibility complex class I and II because it presents glycolipid/lipid antigens. Moreover, the CD1-restricted T cells that recognize these self and foreign antigens participate in both innate and adaptive immune responses. CD1s are constitutively expressed by professional and nonprofessional antigen-presenting cells in mucosal tissues, namely, the skin, lung, and intestine. This suggests that CD1-reactive T cells are involved in the immune responses of these tissues. Indeed, evidence suggests that these cells play important roles in diverse diseases, such as inflammation, autoimmune disease, and infection. Recent studies elucidating the molecular mechanisms by which CD1 presents lipid antigens suggest that defects in these mechanisms could contribute to the activities of CD1-reactive T cells. Thus, improving our understanding of these mechanisms could lead to new and effective therapeutic approaches to CD1-associated diseases. In this review, we discuss the CD1-mediated antigen presentation system and its roles in mucosal tissue immunity.
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Affiliation(s)
- Seohyun Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Sumin Cho
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Ji Hyung Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea.
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8
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Shahine A, Van Rhijn I, Rossjohn J, Moody DB. CD1 displays its own negative regulators. Curr Opin Immunol 2023; 83:102339. [PMID: 37245411 PMCID: PMC10527790 DOI: 10.1016/j.coi.2023.102339] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 04/24/2023] [Accepted: 04/25/2023] [Indexed: 05/30/2023]
Abstract
After two decades of the study of lipid antigens that activate CD1-restricted T cells, new studies show how autoreactive αβ T-cell receptors (TCRs) can directly recognize the outer surface of CD1 proteins in ways that are lipid-agnostic. Most recently, this lipid agnosticism has turned to negativity, with the discovery of natural CD1 ligands that dominantly negatively block autoreactive αβ TCR binding to CD1a and CD1d. This review highlights the basic differences between positive and negative regulation of cellular systems. We outline strategies to discover lipid inhibitors of CD1-reactive T cells, whose roles in vivo are becoming clear, especially in CD1-mediated skin disease.
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Affiliation(s)
- Adam Shahine
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Ildiko Van Rhijn
- Division of Rheumatology, Inflammation and Immunity, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 60 Fenwood Road, Boston, MA 02115, USA
| | - Jamie Rossjohn
- Infection and Immunity Program and 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.
| | - D Branch Moody
- Division of Rheumatology, Inflammation and Immunity, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, 60 Fenwood Road, Boston, MA 02115, USA.
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Chen YL, Ng JSW, Ottakandathil Babu R, Woo J, Nahler J, Hardman CS, Kurupati P, Nussbaum L, Gao F, Dong T, Ladell K, Price DA, Duncan DA, Johnson D, Gileadi U, Koohy H, Ogg GS. Group A Streptococcus induces CD1a-autoreactive T cells and promotes psoriatic inflammation. Sci Immunol 2023; 8:eadd9232. [PMID: 37267382 PMCID: PMC7615662 DOI: 10.1126/sciimmunol.add9232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Accepted: 04/26/2023] [Indexed: 06/04/2023]
Abstract
Group A Streptococcus (GAS) infection is associated with multiple clinical sequelae, including different subtypes of psoriasis. Such post-streptococcal disorders have been long known but are largely unexplained. CD1a is expressed at constitutively high levels by Langerhans cells and presents lipid antigens to T cells, but the potential relevance to GAS infection has not been studied. Here, we investigated whether GAS-responsive CD1a-restricted T cells contribute to the pathogenesis of psoriasis. Healthy individuals had high frequencies of circulating and cutaneous GAS-responsive CD4+ and CD8+ T cells with rapid effector functions, including the production of interleukin-22 (IL-22). Human skin and blood single-cell CITE-seq analyses of IL-22-producing T cells showed a type 17 signature with proliferative potential, whereas IFN-γ-producing T cells displayed cytotoxic T lymphocyte characteristics. Furthermore, individuals with psoriasis had significantly higher frequencies of circulating GAS-reactive T cells, enriched for markers of activation, cytolytic potential, and tissue association. In addition to responding to GAS, subsets of expanded GAS-reactive T cell clones/lines were found to be autoreactive, which included the recognition of the self-lipid antigen lysophosphatidylcholine. CD8+ T cell clones/lines produced cytolytic mediators and lysed infected CD1a-expressing cells. Furthermore, we established cutaneous models of GAS infection in a humanized CD1a transgenic mouse model and identified enhanced and prolonged local and systemic inflammation, with resolution through a psoriasis-like phenotype. Together, these findings link GAS infection to the CD1a pathway and show that GAS infection promotes the proliferation and activation of CD1a-autoreactive T cells, with relevance to post-streptococcal disease, including the pathogenesis and treatment of psoriasis.
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Affiliation(s)
- Yi-Ling Chen
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Jessica Soo Weei Ng
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Rosana Ottakandathil Babu
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Jeongmin Woo
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Janina Nahler
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Clare S Hardman
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Prathiba Kurupati
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Lea Nussbaum
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Fei Gao
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- CAMS-Oxford International Centre for Translational Immunology, University of Oxford, Oxford, UK
| | - Tao Dong
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- CAMS-Oxford International Centre for Translational Immunology, University of Oxford, Oxford, UK
| | - Kristin Ladell
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - David A Price
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
- Systems Immunity Research Institute, School of Medicine, Cardiff University, Cardiff, UK
| | - David A Duncan
- Diamond Light Source, Harwell Science and Innovation Campus, Didcot, UK
| | - David Johnson
- Department of Plastic and Reconstructive Surgery, John Radcliffe Hospital, Oxford University Hospitals National Health Services Foundation Trust, Oxford, UK
| | - Uzi Gileadi
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Hashem Koohy
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- Alan Turing Fellow in Health and Medicine, Oxford, UK
| | - Graham S Ogg
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
- CAMS-Oxford International Centre for Translational Immunology, University of Oxford, Oxford, UK
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10
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Bedard M, van der Niet S, Bernard EM, Babunovic G, Cheng TY, Aylan B, Grootemaat AE, Raman S, Botella L, Ishikawa E, O'Sullivan MP, O'Leary S, Mayfield JA, Buter J, Minnaard AJ, Fortune SM, Murphy LO, Ory DS, Keane J, Yamasaki S, Gutierrez MG, van der Wel N, Moody DB. A terpene nucleoside from M. tuberculosis induces lysosomal lipid storage in foamy macrophages. J Clin Invest 2023; 133:161944. [PMID: 36757797 PMCID: PMC10014106 DOI: 10.1172/jci161944] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 02/03/2023] [Indexed: 02/10/2023] Open
Abstract
Induction of lipid-laden foamy macrophages is a cellular hallmark of tuberculosis (TB) disease, which involves the transformation of infected phagolysosomes from a site of killing into a nutrient-rich replicative niche. Here, we show that a terpenyl nucleoside shed from Mycobacterium tuberculosis, 1-tuberculosinyladenosine (1-TbAd), caused lysosomal maturation arrest and autophagy blockade, leading to lipid storage in M1 macrophages. Pure 1-TbAd, or infection with terpenyl nucleoside-producing M. tuberculosis, caused intralysosomal and peribacillary lipid storage patterns that matched both the molecules and subcellular locations known in foamy macrophages. Lipidomics showed that 1-TbAd induced storage of triacylglycerides and cholesterylesters and that 1-TbAd increased M. tuberculosis growth under conditions of restricted lipid access in macrophages. Furthermore, lipidomics identified 1-TbAd-induced lipid substrates that define Gaucher's disease, Wolman's disease, and other inborn lysosomal storage diseases. These data identify genetic and molecular causes of M. tuberculosis-induced lysosomal failure, leading to successful testing of an agonist of TRPML1 calcium channels that reverses lipid storage in cells. These data establish the host-directed cellular functions of an orphan effector molecule that promotes survival in macrophages, providing both an upstream cause and detailed picture of lysosome failure in foamy macrophages.
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Affiliation(s)
- Melissa Bedard
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Sanne van der Niet
- Electron Microscopy Centre Amsterdam, Amsterdam University Medical Centre, Amsterdam, Netherlands
| | - Elliott M Bernard
- Host-Pathogen Interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Gregory Babunovic
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Tan-Yun Cheng
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Beren Aylan
- Host-Pathogen Interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Anita E Grootemaat
- Electron Microscopy Centre Amsterdam, Amsterdam University Medical Centre, Amsterdam, Netherlands
| | - Sahadevan Raman
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Laure Botella
- Host-Pathogen Interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Eri Ishikawa
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Mary P O'Sullivan
- Department of Clinical Medicine, Trinity Translational Medicine Institute, St. James's Hospital, Trinity College, Dublin, Ireland
| | - Seónadh O'Leary
- Department of Clinical Medicine, Trinity Translational Medicine Institute, St. James's Hospital, Trinity College, Dublin, Ireland
| | - Jacob A Mayfield
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jeffrey Buter
- Department of Chemical Biology, Stratingh Institute for Chemistry, Groningen, Netherlands
| | - Adriaan J Minnaard
- Department of Chemical Biology, Stratingh Institute for Chemistry, Groningen, Netherlands
| | - Sarah M Fortune
- Department of Immunology and Infectious Diseases, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | | | - Daniel S Ory
- Casma Therapeutics, Cambridge, Massachusetts, USA
| | - Joseph Keane
- Department of Clinical Medicine, Trinity Translational Medicine Institute, St. James's Hospital, Trinity College, Dublin, Ireland
| | - Sho Yamasaki
- Department of Molecular Immunology, Research Institute for Microbial Diseases, Osaka University, Suita, Japan
| | - Maximiliano G Gutierrez
- Host-Pathogen Interactions in Tuberculosis Laboratory, The Francis Crick Institute, London, United Kingdom
| | - Nicole van der Wel
- Electron Microscopy Centre Amsterdam, Amsterdam University Medical Centre, Amsterdam, Netherlands
| | - D Branch Moody
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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11
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Farquhar R, Van Rhijn I, Moody DB, Rossjohn J, Shahine A. αβ T-cell receptor recognition of self-phosphatidylinositol presented by CD1b. J Biol Chem 2023; 299:102849. [PMID: 36587766 PMCID: PMC9900620 DOI: 10.1016/j.jbc.2022.102849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2022] [Revised: 12/21/2022] [Accepted: 12/23/2022] [Indexed: 12/31/2022] Open
Abstract
CD1 glycoproteins present lipid-based antigens to T-cell receptors (TCRs). A role for CD1b in T-cell-mediated autoreactivity was proposed when it was established that CD1b can present self-phospholipids with short alkyl chains (∼C34) to T cells; however, the structural characteristics of this presentation and recognition are unclear. Here, we report the 1.9 Å resolution binary crystal structure of CD1b presenting a self-phosphatidylinositol-C34:1 and an endogenous scaffold lipid. Moreover, we also determined the 2.4 Å structure of CD1b-phosphatidylinositol complexed to an autoreactive αβ TCR, BC8B. We show that the TCR docks above CD1b and directly contacts the presented antigen, selecting for both the phosphoinositol headgroup and glycerol neck region via antigen remodeling within CD1b and allowing lateral escape of the inositol moiety through a channel formed by the TCR α-chain. Furthermore, through alanine scanning mutagenesis and surface plasmon resonance, we identified key CD1b residues mediating this interaction, with Glu-80 abolishing TCR binding. We in addition define a role for both CD1b α1 and CD1b α2 molecular domains in modulating this interaction. These findings suggest that the BC8B TCR contacts both the presented phospholipid and the endogenous scaffold lipid via a dual mechanism of corecognition. Taken together, these data expand our understanding into the molecular mechanisms of CD1b-mediated T-cell autoreactivity.
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Affiliation(s)
- Rachel Farquhar
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Ildiko Van Rhijn
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA; Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands
| | - D Branch Moody
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia; Institute of Infection and Immunity, Cardiff University, School of Medicine, Cardiff, United Kingdom.
| | - Adam Shahine
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.
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12
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Monnot GC, Wegrecki M, Cheng TY, Chen YL, Sallee BN, Chakravarthy R, Karantza IM, Tin SY, Khaleel AE, Monga I, Uwakwe LN, Tillman A, Cheng B, Youssef S, Ng SW, Shahine A, Garcia-Vilas JA, Uhlemann AC, Bordone LA, Han A, Rohde CH, Ogg G, Moody DB, Rossjohn J, de Jong A. Staphylococcal phosphatidylglycerol antigens activate human T cells via CD1a. Nat Immunol 2023; 24:110-122. [PMID: 36550321 PMCID: PMC10389259 DOI: 10.1038/s41590-022-01375-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Accepted: 10/31/2022] [Indexed: 12/24/2022]
Abstract
Expressed on epidermal Langerhans cells, CD1a presents a range of self-lipid antigens found within the skin; however, the extent to which CD1a presents microbial ligands from bacteria colonizing the skin is unclear. Here we identified CD1a-dependent T cell responses to phosphatidylglycerol (PG), a ubiquitous bacterial membrane phospholipid, as well as to lysylPG, a modified PG, present in several Gram-positive bacteria and highly abundant in Staphylococcus aureus. The crystal structure of the CD1a-PG complex showed that the acyl chains were buried within the A'- and F'-pockets of CD1a, while the phosphoglycerol headgroup remained solvent exposed in the F'-portal and was available for T cell receptor contact. Using lysylPG and PG-loaded CD1a tetramers, we identified T cells in peripheral blood and in skin that respond to these lipids in a dose-dependent manner. Tetramer+CD4+ T cell lines secreted type 2 helper T cell cytokines in response to phosphatidylglycerols as well as to co-cultures of CD1a+ dendritic cells and Staphylococcus bacteria. The expansion in patients with atopic dermatitis of CD4+ CD1a-(lysyl)PG tetramer+ T cells suggests a response to lipids made by bacteria associated with atopic dermatitis and provides a link supporting involvement of PG-based lipid-activated T cells in atopic dermatitis pathogenesis.
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Affiliation(s)
- Gwennaëlle C Monnot
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Marcin Wegrecki
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Tan-Yun Cheng
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Yi-Ling Chen
- Medical Research Council Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Brigitte N Sallee
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Reka Chakravarthy
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Ioanna Maria Karantza
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Shin Yi Tin
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Alexandra E Khaleel
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Isha Monga
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Laura N Uwakwe
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Alice Tillman
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA
- Microbiome and Pathogen Genomics Core, Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - Bin Cheng
- Department of Biostatistics, Columbia University Irving Medical Center, New York, NY, USA
| | - Soundos Youssef
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Soo Weei Ng
- Medical Research Council Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Adam Shahine
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Javier A Garcia-Vilas
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - Anne-Catrin Uhlemann
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA
- Microbiome and Pathogen Genomics Core, Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - Lindsey A Bordone
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA
| | - Arnold Han
- Department of Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - Christine H Rohde
- Department of Surgery, Columbia University Irving Medical Center, New York, NY, USA
| | - Graham Ogg
- Medical Research Council Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - D Branch Moody
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, UK
| | - Annemieke de Jong
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY, USA.
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13
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Hardman CS, Chen YL, Wegrecki M, Ng SW, Murren R, Mangat D, Silva JP, Munro R, Chan WY, O'Dowd V, Doyle C, Mori P, Popplewell A, Rossjohn J, Lightwood D, Ogg GS. CD1a promotes systemic manifestations of skin inflammation. Nat Commun 2022; 13:7535. [PMID: 36477177 PMCID: PMC9729296 DOI: 10.1038/s41467-022-35071-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 11/17/2022] [Indexed: 12/12/2022] Open
Abstract
Inflammatory skin conditions are increasingly recognised as being associated with systemic inflammation. The mechanisms connecting the cutaneous and systemic disease are not well understood. CD1a is a virtually monomorphic major histocompatibility complex (MHC) class I-like molecule, highly expressed by skin and mucosal Langerhans cells, and presents lipid antigens to T-cells. Here we show an important role for CD1a in linking cutaneous and systemic inflammation in two experimental disease models. In human CD1a transgenic mice, the toll-like receptor (TLR)7 agonist imiquimod induces more pronounced splenomegaly, expansion of the peripheral blood and spleen T cell compartments, and enhanced neutrophil and eosinophil responses compared to the wild-type, accompanied by elevated skin and plasma cytokine levels, including IL-23, IL-1α, IL-1β, MCP-1 and IL-17A. Similar systemic escalation is shown in MC903-induced skin inflammation. The exacerbated inflammation could be counter-acted by CD1a-blocking antibodies, developed and screened in our laboratories. The beneficial effect is epitope dependent, and we further characterise the five best-performing antibodies for their capacity to modulate CD1a-expressing cells and ameliorate CD1a-dependent systemic inflammatory responses. In summary, we show that a therapeutically targetable CD1a-dependent pathway may play a role in the systemic spread of cutaneous inflammation.
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Affiliation(s)
- Clare S Hardman
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Yi-Ling Chen
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Marcin Wegrecki
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
| | - Soo Weei Ng
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | | | | | | | | | | | | | - Carl Doyle
- UCB Pharma, 208 Bath Road, Slough, SL1 3WE, UK
| | | | | | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, Australia
- Institute of Infection and Immunity, School of Medicine, Cardiff University, Cardiff, CF14 4XN, UK
| | | | - Graham S Ogg
- MRC Human Immunology Unit, MRC Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK.
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14
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LeBlanc G, Kreissl F, Melamed J, Sobel AL, Constantinides MG. The role of unconventional T cells in maintaining tissue homeostasis. Semin Immunol 2022; 61-64:101656. [PMID: 36306662 PMCID: PMC9828956 DOI: 10.1016/j.smim.2022.101656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/03/2022] [Revised: 09/01/2022] [Accepted: 09/21/2022] [Indexed: 01/12/2023]
Affiliation(s)
- Gabrielle LeBlanc
- Department of Immunology & Microbiology, Scripps Research, La Jolla, CA 92037, USA,These authors contributed equally
| | - Felix Kreissl
- Department of Immunology & Microbiology, Scripps Research, La Jolla, CA 92037, USA,These authors contributed equally
| | - Jonathan Melamed
- Department of Immunology & Microbiology, Scripps Research, La Jolla, CA 92037, USA,These authors contributed equally
| | - Adam L. Sobel
- Department of Immunology & Microbiology, Scripps Research, La Jolla, CA 92037, USA,These authors contributed equally
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15
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Ong PY. Atopic dermatitis: Is innate or adaptive immunity in control? A clinical perspective. Front Immunol 2022; 13:943640. [PMID: 35967329 PMCID: PMC9363562 DOI: 10.3389/fimmu.2022.943640] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Accepted: 07/01/2022] [Indexed: 11/25/2022] Open
Abstract
Atopic dermatitis (AD) is a chronic inflammatory skin disease with barrier defects and immune dysregulations. The pathogenesis of AD involves the physical barrier as well as epithelial cells, which are considered a vital part of the innate immunity of the skin. The importance of filaggrin mutations in the pathogenesis of AD has also been well-established with reproducible results around the world in multiple studies and ethnic groups. This protein plays an important role in skin barrier functions and further reaffirms barrier defects as one of the primary causes of AD. The main epithelial cells, keratinocytes, function as a major sentinel for the skin in detecting danger signals or microbial pathogens, and trigger downstream immune responses. In AD, these cells express TSLP, IL-33 and IL-25, which lead to downstream systemic production of type 2 cytokines. In spite of major advances in our understanding of the innate immunity of AD, recent success in the systemic therapeutics of AD have focused on targeting the products of the adaptive immunity, particularly cytokines produced by T cells. In addition to type 2 cytokines, type 17 cytokines have also been implicated in the pathogenesis of AD. The current review examines the implications of these cytokines in AD from clinical perspectives.
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16
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Wegrecki M, Ocampo TA, Gunasinghe SD, von Borstel A, Tin SY, Reijneveld JF, Cao TP, Gully BS, Le Nours J, Moody DB, Van Rhijn I, Rossjohn J. Atypical sideways recognition of CD1a by autoreactive γδ T cell receptors. Nat Commun 2022; 13:3872. [PMID: 35790773 PMCID: PMC9256601 DOI: 10.1038/s41467-022-31443-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Accepted: 06/16/2022] [Indexed: 01/04/2023] Open
Abstract
CD1a is a monomorphic antigen-presenting molecule on dendritic cells that presents lipids to αβ T cells. Whether CD1a represents a ligand for other immune receptors remains unknown. Here we use CD1a tetramers to show that CD1a is a ligand for Vδ1+ γδ T cells. Functional studies suggest that two γδ T cell receptors (TCRs) bound CD1a in a lipid-independent manner. The crystal structures of three Vγ4Vδ1 TCR-CD1a-lipid complexes reveal that the γδ TCR binds at the extreme far side and parallel to the long axis of the β-sheet floor of CD1a's antigen-binding cleft. Here, the γδ TCR co-recognises the CD1a heavy chain and β2 microglobulin in a manner that is distinct from all other previously observed γδ TCR docking modalities. The 'sideways' and lipid antigen independent mode of autoreactive CD1a recognition induces TCR clustering on the cell surface and proximal T cell signalling as measured by CD3ζ phosphorylation. In contrast with the 'end to end' binding of αβ TCRs that typically contact carried antigens, autoreactive γδ TCRs support geometrically diverse approaches to CD1a, as well as antigen independent recognition.
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Affiliation(s)
- Marcin Wegrecki
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Tonatiuh A Ocampo
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, US
| | - Sachith D Gunasinghe
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- European Molecular Biology Laboratory (EMBL) Australia Node in Single Molecule Science, School of Medical Sciences, University of New South Wales, Sydney, New South Wales, Australia
| | - Anouk von Borstel
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Shin Yi Tin
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Josephine F Reijneveld
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, US
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands
| | - Thinh-Phat Cao
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Benjamin S Gully
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Jérôme Le Nours
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - D Branch Moody
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, US.
| | - Ildiko Van Rhijn
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, US.
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, Netherlands.
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.
- Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff, UK.
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17
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Genardi S, Morgun E, Wang CR. CD1-Restricted T Cells in Inflammatory Skin Diseases. J Invest Dermatol 2022; 142:768-773. [PMID: 34130802 PMCID: PMC8665943 DOI: 10.1016/j.jid.2021.03.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Revised: 03/17/2021] [Accepted: 03/21/2021] [Indexed: 12/14/2022]
Abstract
Autoimmunity results from the breaking of immune tolerance, leading to inflammation and pathology. Although well studied in the conventional T-cell field, the role of nonconventional T cells in autoimmunity is less understood. CD1-restricted T cells recognize lipid antigens rather than peptide antigens and have been implicated in various autoimmune skin conditions, including psoriasis and atopic dermatitis. In this review, we will discuss the self-lipids that CD1-restricted T cells recognize and how these T cells become aberrantly regulated in pathogenic skin conditions.
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Affiliation(s)
- Samantha Genardi
- Department of Microbiology and Immunology, Feinberg
School of Medicine, Northwestern University, Chicago, IL 60611
| | - Eva Morgun
- Department of Microbiology and Immunology, Feinberg
School of Medicine, Northwestern University, Chicago, IL 60611
| | - Chyung-Ru Wang
- Department of Microbiology and Immunology, Feinberg
School of Medicine, Northwestern University, Chicago, IL 60611
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18
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Sato T, Ogawa Y, Ishikawa A, Nagasaka Y, Kinoshita M, Shiokawa I, Shimada S, Momosawa A, Kawamura T. Revisiting the Experimental Methods for Human Skin T Cell Analysis. JID INNOVATIONS 2022; 2:100125. [PMID: 35620704 PMCID: PMC9127406 DOI: 10.1016/j.xjidi.2022.100125] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2021] [Revised: 02/05/2022] [Accepted: 03/04/2022] [Indexed: 10/27/2022] Open
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19
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Mitchell J, Kannourakis G. Does CD1a Expression Influence T Cell Function in Patients With Langerhans Cell Histiocytosis? Front Immunol 2021; 12:773598. [PMID: 34956202 PMCID: PMC8702800 DOI: 10.3389/fimmu.2021.773598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Accepted: 11/25/2021] [Indexed: 11/13/2022] Open
Abstract
Langerhans cell histiocytosis lesions are characterized by CD1a+ myeloid lineage LCH cells and an inflammatory infiltrate of cytokines and immune cells, including T cells. T cells that recognize CD1a may be implicated in the pathology of many disease states including cancer and autoimmunity but have not been studied in the context of LCH despite the expression of CD1a by LCH cells. In this perspective article, we discuss the expression of CD1a by LCH cells, and we explore the potential for T cells that recognize CD1a to be involved in LCH pathogenesis.
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Affiliation(s)
- Jenée Mitchell
- Fiona Elsey Cancer Research Institute, Ballarat, VIC, Australia
| | - George Kannourakis
- Fiona Elsey Cancer Research Institute, Ballarat, VIC, Australia
- Federation University Australia, Ballarat, VIC, Australia
- *Correspondence: George Kannourakis,
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20
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Zhou AX, Scriba TJ, Day CL, Hagge DA, Seshadri C. A simple assay to quantify mycobacterial lipid antigen-specific T cell receptors in human tissues and blood. PLoS Negl Trop Dis 2021; 15:e0010018. [PMID: 34914694 PMCID: PMC8717985 DOI: 10.1371/journal.pntd.0010018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 12/30/2021] [Accepted: 11/23/2021] [Indexed: 11/19/2022] Open
Abstract
T cell receptors (TCRs) encode the history of antigenic challenge within an individual and have the potential to serve as molecular markers of infection. In addition to peptide antigens bound to highly polymorphic MHC molecules, T cells have also evolved to recognize bacterial lipids when bound to non-polymorphic CD1 molecules. One such subset, germline-encoded, mycolyl lipid-reactive (GEM) T cells, recognizes mycobacterial cell wall lipids and expresses a conserved TCR-ɑ chain that is shared among genetically unrelated individuals. We developed a quantitative PCR assay to determine expression of the GEM TCR-ɑ nucleotide sequence in human tissues and blood. This assay was validated on plasmids and T cell lines. We tested blood samples from South African subjects with or without tuberculin reactivity or with active tuberculosis disease. We were able to detect GEM TCR-ɑ above the limit of detection in 92% of donors but found no difference in GEM TCR-ɑ expression among the three groups after normalizing for total TCR-ɑ expression. In a cohort of leprosy patients from Nepal, we successfully detected GEM TCR-ɑ in 100% of skin biopsies with histologically confirmed tuberculoid and lepromatous leprosy. Thus, GEM T cells constitute part of the T cell repertoire in the skin. However, GEM TCR-ɑ expression was not different between leprosy patients and control subjects after normalization. Further, these results reveal the feasibility of developing a simple, field deployable molecular diagnostic based on mycobacterial lipid antigen-specific TCR sequences that are readily detectable in human tissues and blood independent of genetic background.
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MESH Headings
- Antigens, CD1/genetics
- Antigens, CD1/immunology
- Cell Wall/genetics
- Cell Wall/immunology
- Cohort Studies
- Humans
- Leprosy/blood
- Leprosy/diagnosis
- Leprosy/immunology
- Leprosy/microbiology
- Lipids/immunology
- Molecular Diagnostic Techniques/methods
- Mycobacterium/genetics
- Mycobacterium/immunology
- Mycobacterium/isolation & purification
- Nepal
- Polymerase Chain Reaction
- Receptors, Antigen, T-Cell, alpha-beta/blood
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, alpha-beta/immunology
- South Africa
- T-Lymphocytes/immunology
- T-Lymphocytes/microbiology
- Tuberculosis/blood
- Tuberculosis/diagnosis
- Tuberculosis/immunology
- Tuberculosis/microbiology
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Affiliation(s)
- Angela X. Zhou
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
- Tuberculosis Research and Training Center, University of Washington, Seattle, Washington, United States of America
| | - Thomas J. Scriba
- South African Tuberculosis Vaccine Initiative, Institute of Infectious Disease and Molecular Medicine and Division of Immunology, Department of Pathology, University of Cape Town, Cape Town, South Africa
| | - Cheryl L. Day
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Deanna A. Hagge
- Mycobacterial Research Laboratories, Anandaban Hospital, Kathmandu, Nepal
| | - Chetan Seshadri
- Department of Medicine, University of Washington, Seattle, Washington, United States of America
- Tuberculosis Research and Training Center, University of Washington, Seattle, Washington, United States of America
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21
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Abstract
Unconventional T cells are a diverse and underappreciated group of relatively rare lymphocytes that are distinct from conventional CD4+ and CD8+ T cells, and that mainly recognize antigens in the absence of classical restriction through the major histocompatibility complex (MHC). These non-MHC-restricted T cells include mucosal-associated invariant T (MAIT) cells, natural killer T (NKT) cells, γδ T cells and other, often poorly defined, subsets. Depending on the physiological context, unconventional T cells may assume either protective or pathogenic roles in a range of inflammatory and autoimmune responses in the kidney. Accordingly, experimental models and clinical studies have revealed that certain unconventional T cells are potential therapeutic targets, as well as prognostic and diagnostic biomarkers. The responsiveness of human Vγ9Vδ2 T cells and MAIT cells to many microbial pathogens, for example, has implications for early diagnosis, risk stratification and targeted treatment of peritoneal dialysis-related peritonitis. The expansion of non-Vγ9Vδ2 γδ T cells during cytomegalovirus infection and their contribution to viral clearance suggest that these cells can be harnessed for immune monitoring and adoptive immunotherapy in kidney transplant recipients. In addition, populations of NKT, MAIT or γδ T cells are involved in the immunopathology of IgA nephropathy and in models of glomerulonephritis, ischaemia-reperfusion injury and kidney transplantation.
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22
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Reijneveld JF, Marino L, Cao TP, Cheng TY, Dam D, Shahine A, Witte MD, Filippov DV, Suliman S, van der Marel GA, Moody DB, Minnaard AJ, Rossjohn J, Codée JDC, Van Rhijn I. Rational design of a hydrolysis-resistant mycobacterial phosphoglycolipid antigen presented by CD1c to T cells. J Biol Chem 2021; 297:101197. [PMID: 34536421 PMCID: PMC8511953 DOI: 10.1016/j.jbc.2021.101197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Revised: 08/20/2021] [Accepted: 08/30/2021] [Indexed: 11/25/2022] Open
Abstract
Whereas proteolytic cleavage is crucial for peptide presentation by classical major histocompatibility complex (MHC) proteins to T cells, glycolipids presented by CD1 molecules are typically presented in an unmodified form. However, the mycobacterial lipid antigen mannosyl-β1-phosphomycoketide (MPM) may be processed through hydrolysis in antigen presenting cells, forming mannose and phosphomycoketide (PM). To further test the hypothesis that some lipid antigens are processed, and to generate antigens that lead to defined epitopes for future tuberculosis vaccines or diagnostic tests, we aimed to create hydrolysis-resistant MPM variants that retain their antigenicity. Here, we designed and tested three different, versatile synthetic strategies to chemically stabilize MPM analogs. Crystallographic studies of CD1c complexes with these three new MPM analogs showed anchoring of the lipid tail and phosphate group that is highly comparable to nature-identical MPM, with considerable conformational flexibility for the mannose head group. MPM-3, a difluoromethylene-modified version of MPM that is resistant to hydrolysis, showed altered recognition by cells, but not by CD1c proteins, supporting the cellular antigen processing hypothesis. Furthermore, the synthetic analogs elicited T cell responses that were cross-reactive with nature-identical MPM, fulfilling important requirements for future clinical use.
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Affiliation(s)
- Josephine F Reijneveld
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA; Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands; Stratingh Institute for Chemistry, University of Groningen, Groningen, the Netherlands
| | - Laura Marino
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, the Netherlands
| | - Thinh-Phat Cao
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Tan-Yun Cheng
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Dennis Dam
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, the Netherlands
| | - Adam Shahine
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
| | - Martin D Witte
- Stratingh Institute for Chemistry, University of Groningen, Groningen, the Netherlands
| | - Dmitri V Filippov
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, the Netherlands
| | - Sara Suliman
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Gijsbert A van der Marel
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, the Netherlands
| | - D Branch Moody
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Adriaan J Minnaard
- Stratingh Institute for Chemistry, University of Groningen, Groningen, the Netherlands
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia; Institute of Infection and Immunity, Cardiff University, School of Medicine, Cardiff, United Kingdom
| | - Jeroen D C Codée
- Department of Bio-organic Synthesis, Faculty of Science, Leiden Institute of Chemistry, Leiden University, Leiden, the Netherlands.
| | - Ildiko Van Rhijn
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA; Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, the Netherlands.
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23
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Almeida CF, Smith DGM, Cheng TY, Harpur CM, Batleska E, Nguyen-Robertson CV, Nguyen T, Thelemann T, Reddiex SJJ, Li S, Eckle SBG, Van Rhijn I, Rossjohn J, Uldrich AP, Moody DB, Williams SJ, Pellicci DG, Godfrey DI. Benzofuran sulfonates and small self-lipid antigens activate type II NKT cells via CD1d. Proc Natl Acad Sci U S A 2021; 118:e2104420118. [PMID: 34417291 PMCID: PMC8403964 DOI: 10.1073/pnas.2104420118] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Natural killer T (NKT) cells detect lipids presented by CD1d. Most studies focus on type I NKT cells that express semi-invariant αβ T cell receptors (TCR) and recognize α-galactosylceramides. However, CD1d also presents structurally distinct lipids to NKT cells expressing diverse TCRs (type II NKT cells), but our knowledge of the antigens for type II NKT cells is limited. An early study identified a nonlipidic NKT cell agonist, phenyl pentamethyldihydrobenzofuransulfonate (PPBF), which is notable for its similarity to common sulfa drugs, but its mechanism of NKT cell activation remained unknown. Here, we demonstrate that a range of pentamethylbenzofuransulfonates (PBFs), including PPBF, activate polyclonal type II NKT cells from human donors. Whereas these sulfa drug-like molecules might have acted pharmacologically on cells, here we demonstrate direct contact between TCRs and PBF-treated CD1d complexes. Further, PBF-treated CD1d tetramers identified type II NKT cell populations expressing αβTCRs and γδTCRs, including those with variable and joining region gene usage (TRAV12-1-TRAJ6) that was conserved across donors. By trapping a CD1d-type II NKT TCR complex for direct mass-spectrometric analysis, we detected molecules that allow the binding of CD1d to TCRs, finding that both selected PBF family members and short-chain sphingomyelin lipids are present in these complexes. Furthermore, the combination of PPBF and short-chain sphingomyelin enhances CD1d tetramer staining of PPBF-reactive T cell lines over either molecule alone. This study demonstrates that nonlipidic small molecules, which resemble sulfa drugs implicated in systemic hypersensitivity and drug allergy reactions, are targeted by a polyclonal population of type II NKT cells in a CD1d-restricted manner.
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Affiliation(s)
- Catarina F Almeida
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia;
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Dylan G M Smith
- School of Chemistry, The University of Melbourne, Melbourne, VIC 3052, Australia
- Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, VIC 3052, Australia
| | - Tan-Yun Cheng
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Boston, MA 02115
| | - Chris M Harpur
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia
| | - Elena Batleska
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia
| | - Catriona V Nguyen-Robertson
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Tram Nguyen
- School of Chemistry, The University of Melbourne, Melbourne, VIC 3052, Australia
- Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, VIC 3052, Australia
| | - Tamara Thelemann
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia
| | - Scott J J Reddiex
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Shihan Li
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - Sidonia B G Eckle
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia
| | - Ildiko Van Rhijn
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Boston, MA 02115
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, University Utrecht, 3584CL Utrecht, Netherlands
| | - Jamie Rossjohn
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia
- Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff CF14 4XN, United Kingdom
| | - Adam P Uldrich
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Melbourne, Melbourne, VIC 3010, Australia
| | - D Branch Moody
- Division of Rheumatology, Immunity and Inflammation, Brigham and Women's Hospital, Boston, MA 02115;
| | - Spencer J Williams
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Melbourne, Melbourne, VIC 3010, Australia;
- School of Chemistry, The University of Melbourne, Melbourne, VIC 3052, Australia
- Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Melbourne, VIC 3052, Australia
| | - Daniel G Pellicci
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia;
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Melbourne, Melbourne, VIC 3010, Australia
- Murdoch Children's Research Institute, Parkville, VIC 3052, Australia
- Department of Paediatrics, The University of Melbourne, Parkville, VIC 3052, Australia
| | - Dale I Godfrey
- Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, The University of Melbourne, Melbourne, VIC 3000, Australia;
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Melbourne, Melbourne, VIC 3010, Australia
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24
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Cotton RN, Wegrecki M, Cheng TY, Chen YL, Veerapen N, Le Nours J, Orgill DP, Pomahac B, Talbot SG, Willis R, Altman JD, de Jong A, Van Rhijn I, Clark RA, Besra GS, Ogg G, Rossjohn J, Moody DB. CD1a selectively captures endogenous cellular lipids that broadly block T cell response. J Exp Med 2021; 218:e20202699. [PMID: 33961028 PMCID: PMC8111460 DOI: 10.1084/jem.20202699] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 02/12/2021] [Accepted: 03/17/2021] [Indexed: 12/24/2022] Open
Abstract
We optimized lipidomics methods to broadly detect endogenous lipids bound to cellular CD1a proteins. Whereas membrane phospholipids dominate in cells, CD1a preferentially captured sphingolipids, especially a C42, doubly unsaturated sphingomyelin (42:2 SM). The natural 42:2 SM but not the more common 34:1 SM blocked CD1a tetramer binding to T cells in all human subjects tested. Thus, cellular CD1a selectively captures a particular endogenous lipid that broadly blocks its binding to TCRs. Crystal structures show that the short cellular SMs stabilized a triad of surface residues to remain flush with CD1a, but the longer lipids forced the phosphocholine group to ride above the display platform to hinder TCR approach. Whereas nearly all models emphasize antigen-mediated T cell activation, we propose that the CD1a system has intrinsic autoreactivity and is negatively regulated by natural endogenous inhibitors selectively bound in its cleft. Further, the detailed chemical structures of natural blockers could guide future design of therapeutic blockers of CD1a response.
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Affiliation(s)
- Rachel N. Cotton
- Graduate Program in Immunology, Harvard Medical School, Boston, MA
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Marcin Wegrecki
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
| | - Tan-Yun Cheng
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Yi-Ling Chen
- Medical Research Council Human Immunology Unit, Medical Research Council Weatherall Institute of Molecular Medicine, National Institute for Health Research, Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - Natacha Veerapen
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Jérôme Le Nours
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
| | - Dennis P. Orgill
- Division of Plastic Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Bohdan Pomahac
- Division of Plastic Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Simon G. Talbot
- Division of Plastic Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Richard Willis
- National Institutes of Health Tetramer Core Facility, Emory University, Atlanta, GA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Research Center, Emory University, Atlanta, GA
| | - John D. Altman
- National Institutes of Health Tetramer Core Facility, Emory University, Atlanta, GA
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, GA
- Yerkes National Primate Research Center, Emory University, Atlanta, GA
| | - Annemieke de Jong
- Department of Dermatology, Columbia University Irving Medical Center, New York, NY
| | - Ildiko Van Rhijn
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Rachael A. Clark
- Department of Dermatology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
| | - Gurdyal S. Besra
- Institute of Microbiology and Infection, School of Biosciences, University of Birmingham, Edgbaston, Birmingham, UK
| | - Graham Ogg
- Medical Research Council Human Immunology Unit, Medical Research Council Weatherall Institute of Molecular Medicine, National Institute for Health Research, Oxford Biomedical Research Centre, University of Oxford, Oxford, UK
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
- Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff, UK
| | - D. Branch Moody
- Division of Rheumatology, Inflammation and Immunity, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA
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25
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Gapin L. CD1a autoreactivity: When size does matter. J Exp Med 2021; 218:e20210531. [PMID: 34014254 PMCID: PMC8142285 DOI: 10.1084/jem.20210531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
CD1a-autoreactive T cells represent a significant proportion of circulating αβ T cells in humans and appear to be enriched in the skin. How their autoreactivity is regulated remains unclear. In this issue of JEM, Cotton et al. (2021. J. Exp. Med.https://doi.org/10.1084/jem.20202699) show that CD1a molecules do not randomly survey cellular lipids but instead capture certain lipid classes that broadly interfere with the binding of autoreactive T cell antigen receptors to the target CD1a. These findings provide new potential therapeutic avenues for manipulating CD1a autoreactive T cell responses.
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Affiliation(s)
- Laurent Gapin
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO
- Department of Immunology and Genomic Medicine, National Jewish Health, Denver, CO
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26
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Yoo HJ, Kim NY, Kim JH. Current Understanding of the Roles of CD1a-Restricted T Cells in the Immune System. Mol Cells 2021; 44:310-317. [PMID: 33980746 PMCID: PMC8175153 DOI: 10.14348/molcells.2021.0059] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 03/31/2021] [Accepted: 04/01/2021] [Indexed: 12/20/2022] Open
Abstract
Cluster of differentiation 1 (CD1) is a family of cell-surface glycoproteins that present lipid antigens to T cells. Humans have five CD1 isoforms. CD1a is distinguished by the small volume of its antigen-binding groove and its stunted A' pocket, its high and exclusive expression on Langerhans cells, and its localization in the early endosomal and recycling intracellular trafficking compartments. Its ligands originate from self or foreign sources. There are three modes by which the T-cell receptors of CD1a-restricted T cells interact with the CD1a:lipid complex: they bind to both the CD1a surface and the antigen or to only CD1a itself, which activates the T cell, or they are unable to bind because of bulky motifs protruding from the antigen-binding groove, which might inhibit autoreactive T-cell activation. Recently, several studies have shown that by producing TH2 or TH17 cytokines, CD1a-restricted T cells contribute to inflammatory skin disorders, including atopic dermatitis, psoriasis, allergic contact dermatitis, and wasp/bee venom allergy. They may also participate in other diseases, including pulmonary disorders and cancer, because CD1a-expressing dendritic cells are also located in non-skin tissues. In this mini-review, we discuss the current knowledge regarding the biology of CD1a-reactive T cells and their potential roles in disease.
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Affiliation(s)
- Hyun Jung Yoo
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea
| | - Na Young Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea
| | - Ji Hyung Kim
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, Korea
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27
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Novel Molecular Insights into Human Lipid-Mediated T Cell Immunity. Int J Mol Sci 2021; 22:ijms22052617. [PMID: 33807663 PMCID: PMC7961386 DOI: 10.3390/ijms22052617] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 03/02/2021] [Accepted: 03/03/2021] [Indexed: 12/17/2022] Open
Abstract
T cells represent a critical arm of our immune defense against pathogens. Over the past two decades, considerable inroads have been made in understanding the fundamental principles underpinning the molecular presentation of peptide-based antigens by the Major Histocompatibility Complex molecules (MHC-I and II), and their molecular recognition by specialized subsets of T cells. However, some T cells can recognize lipid-based antigens presented by MHC-I-like molecules that belong to the Cluster of Differentiation 1 (CD1) family. Here, we will review the advances that have been made in the last five years to understand the molecular mechanisms orchestrating the presentation of novel endogenous and exogenous lipid-based antigens by the CD1 glycoproteins and their recognition by specific populations of CD1-reactive T cells.
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28
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Morgun E, Cao L, Wang CR. Role of Group 1 CD1-Restricted T Cells in Host Defense and Inflammatory Diseases. Crit Rev Immunol 2021; 41:1-21. [PMID: 35381140 PMCID: PMC10128144 DOI: 10.1615/critrevimmunol.2021040089] [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] [Indexed: 11/13/2022]
Abstract
Group 1 CD1-restricted T cells are members of the unconventional T cell family that recognize lipid antigens presented by CD1a, CD1b, and CD1c molecules. Although they developmentally mirror invariant natural killer T cells, they have diverse antigen specificity and functional capacity, with both anti-microbial and autoreactive targets. The role of group 1 CD1-restricted T cells has been best established in Mycobacterium tuberculosis (Mtb) infection in which a wide variety of lipid antigens have been identified and their ability to confer protection against Mtb infection in a CD1 transgenic mouse model has been shown. Group 1 CD1-restricted T cells have also been implicated in other infections, inflammatory conditions, and malignancies. In particular, autoreactive group 1 CD1-restricted T cells have been shown to play a role in several skin inflammatory conditions. The prevalence of group 1 CD1 autoreactive T cells in healthy individuals suggests the presence of regulatory mechanisms to suppress autoreactivity in homeostasis. The more recent use of group 1 CD1 tetramers and mouse models has allowed for better characterization of their phenotype, functional capacity, and underlying mechanisms of antigen-specific and autoreactive activation. These discoveries may pave the way for the development of novel vaccines and immunotherapies that target group 1 CD1-restricted T cells.
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Affiliation(s)
- Eva Morgun
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Liang Cao
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
| | - Chyung-Ru Wang
- Department of Microbiology and Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611
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