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Julé AM, Hoyt KJ, Wei K, Gutierrez-Arcelus M, Taylor ML, Ng J, Lederer JA, Case SM, Chang MH, Cohen EM, Dedeoglu F, Hazen MM, Hausmann JS, Halyabar O, Janssen E, Lo J, Lo MS, Meidan E, Roberts JE, Son MBF, Sundel RP, Lee PY, Chatila T, Nigrovic PA, Henderson LA. Th1 polarization defines the synovial fluid T cell compartment in oligoarticular juvenile idiopathic arthritis. JCI Insight 2021; 6:e149185. [PMID: 34403374 PMCID: PMC8492302 DOI: 10.1172/jci.insight.149185] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 08/11/2021] [Indexed: 11/17/2022] Open
Abstract
Oligoarticular juvenile idiopathic arthritis (oligo JIA) is the most common form of chronic inflammatory arthritis in children, yet the cause of this disease remains unknown. To understand immune responses in oligo JIA, we immunophenotyped synovial fluid T cells with flow cytometry, bulk RNA-Seq, single-cell RNA-Seq (scRNA-Seq), DNA methylation studies, and Treg suppression assays. In synovial fluid, CD4+, CD8+, and γδ T cells expressed Th1-related markers, whereas Th17 cells were not enriched. Th1 skewing was prominent in CD4+ T cells, including Tregs, and was associated with severe disease. Transcriptomic studies confirmed a Th1 signature in CD4+ T cells from synovial fluid. The regulatory gene expression signature was preserved in Tregs, even those exhibiting Th1 polarization. These Th1-like Tregs maintained Treg-specific methylation patterns and suppressive function, supporting the stability of this Treg population in the joint. Although synovial fluid CD4+ T cells displayed an overall Th1 phenotype, scRNA-Seq uncovered heterogeneous effector and regulatory subpopulations, including IFN-induced Tregs, peripheral helper T cells, and cytotoxic CD4+ T cells. In conclusion, oligo JIA is characterized by Th1 polarization that encompasses Tregs but does not compromise their regulatory identity. Targeting Th1-driven inflammation and augmenting Treg function may represent important therapeutic approaches in oligo JIA.
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Affiliation(s)
- Amélie M. Julé
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Kacie J. Hoyt
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Kevin Wei
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Maria Gutierrez-Arcelus
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA
| | - Maria L. Taylor
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Julie Ng
- Division of Pulmonary and Critical Care Medicine, and
| | - James A. Lederer
- Department of Surgery, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Siobhan M. Case
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Margaret H. Chang
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Ezra M. Cohen
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Fatma Dedeoglu
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Melissa M. Hazen
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jonathan S. Hausmann
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Olha Halyabar
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Erin Janssen
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jeffrey Lo
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Mindy S. Lo
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Esra Meidan
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Jordan E. Roberts
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Mary Beth F. Son
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Robert P. Sundel
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Pui Y. Lee
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Talal Chatila
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Peter A. Nigrovic
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Division of Rheumatology, Inflammation, and Immunity, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Lauren A. Henderson
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
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2
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Delgado R, Abad-Guamán R, Nicodemus N, Diaz-Perales A, García J, Carabaño R, Menoyo D. Effect of pre- and post-weaning dietary supplementation with arginine and glutamine on rabbit performance and intestinal health. BMC Vet Res 2019; 15:199. [PMID: 31196135 PMCID: PMC6567899 DOI: 10.1186/s12917-019-1945-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 06/04/2019] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The purpose of the present study was to assess if the exposure to glutamine (Gln), arginine (Arg) or their combination from pregnancy, through the maternal diet, to a post weaning supplemented diet, can stimulate litter performance, gut development and immune function. To this end does and their litters were fed the same basal diet no supplemented (control C), or supplemented with 0.4% Gln, 0.4% Arg, or 0.4 Gln + 0.4 Arg. Rabbits were weaned at 25 d of age and fed the same experimental diet as their mothers for 10 additional days (35 d of age). Bacterial translocation to mesenteric lymph nodes (MLN) at 6 d of age and intestinal histology, enzymatic activity, phenotypical and functional analysis of intraepithelial lymphocytes (IEL) from the appendix were determined at 6, 25 and 35 d of age. RESULTS No significant differences on animal performance or mortality rates were observed among dietary treatments. However, kits from rabbit does supplemented with Gln tended (P ≤ 0.10) to reduce the translocation of total number of both aerobic and facultative anaerobic bacteria to the MLN. Also, rabbits fed the Gln supplemented diets maintained intestinal villous height at weaning compared to the non-supplemented diets (P < 0.05). The proportions of CD45+CD4+ and CD45+CD8+ IEL in the appendix were not affected by dietary means. However, in rabbits IEL at weaning dietary Gln significantly upregulated IL-2 and downregulated IL-6 expression. CONCLUSIONS Despite a lack of effect on performance and mortality the inclusion of 0.4% Gln has a positive effect by maintaining intestinal villous height and modulating the cytokine profile at weaning. The supplementation with Arg or Arg + Gln at the selected doses in this study did not exert positive effects on rabbit intestinal health.
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Affiliation(s)
- Rebeca Delgado
- Departamento de Producción Agraria, ETSI Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
| | - Rodrigo Abad-Guamán
- Departamento de Producción Agraria, ETSI Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
| | - Nuria Nicodemus
- Departamento de Producción Agraria, ETSI Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
| | - Araceli Diaz-Perales
- Departamento de Biotecnología, Centro de Biotecnología y Genómica de Plantas, Campus de Montegancedo, Universidad Politécnica de Madrid, Pozuelo de Alarcón, Madrid, Spain
| | - Javier García
- Departamento de Producción Agraria, ETSI Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
| | - Rosa Carabaño
- Departamento de Producción Agraria, ETSI Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
| | - David Menoyo
- Departamento de Producción Agraria, ETSI Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Ciudad Universitaria, Madrid, Spain
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3
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Crawford G, Hayes MD, Seoane RC, Ward S, Dalessandri T, Lai C, Healy E, Kipling D, Proby C, Moyes C, Green K, Best K, Haniffa M, Botto M, Dunn-Walters D, Strid J. Epithelial damage and tissue γδ T cells promote a unique tumor-protective IgE response. Nat Immunol 2018; 19:859-870. [PMID: 30013146 PMCID: PMC6071860 DOI: 10.1038/s41590-018-0161-8] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 06/12/2018] [Indexed: 01/09/2023]
Abstract
IgE is an ancient and conserved immunoglobulin isotype with potent immunological function. Nevertheless, the regulation of IgE responses remains an enigma, and evidence of a role for IgE in host defense is limited. Here we report that topical exposure to a common environmental DNA-damaging xenobiotic initiated stress surveillance by γδTCR+ intraepithelial lymphocytes that resulted in class switching to IgE in B cells and the accumulation of autoreactive IgE. High-throughput antibody sequencing revealed that γδ T cells shaped the IgE repertoire by supporting specific variable-diversity-joining (VDJ) rearrangements with unique characteristics of the complementarity-determining region CDRH3. This endogenous IgE response, via the IgE receptor FcεRI, provided protection against epithelial carcinogenesis, and expression of the gene encoding FcεRI in human squamous-cell carcinoma correlated with good disease prognosis. These data indicate a joint role for immunosurveillance by T cells and by B cells in epithelial tissues and suggest that IgE is part of the host defense against epithelial damage and tumor development.
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MESH Headings
- Animals
- Anthracenes/toxicity
- B-Lymphocytes/physiology
- Carcinoma, Squamous Cell/diagnosis
- Carcinoma, Squamous Cell/immunology
- Cell Death
- Cells, Cultured
- Complementarity Determining Regions/genetics
- DNA Damage
- Epithelial Cells/physiology
- Female
- High-Throughput Nucleotide Sequencing
- Immunoglobulin Class Switching
- Immunoglobulin E/genetics
- Immunoglobulin E/metabolism
- Immunologic Surveillance
- Intraepithelial Lymphocytes/physiology
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Neoplasms, Experimental/chemically induced
- Neoplasms, Experimental/immunology
- Piperidines/toxicity
- Prognosis
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Receptors, Antigen, T-Cell, gamma-delta/metabolism
- Receptors, IgE/metabolism
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Affiliation(s)
- Greg Crawford
- Department of Medicine, Imperial College London, London, UK
| | | | | | - Sophie Ward
- Department of Medicine, Imperial College London, London, UK
| | | | - Chester Lai
- Dermatopharmacology, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom; Dermatology, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Eugene Healy
- Dermatopharmacology, Clinical and Experimental Sciences, Faculty of Medicine, University of Southampton, Southampton, United Kingdom; Dermatology, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - David Kipling
- Division of Cancer and Genetics, School of Medicine, Cardiff University, Cardiff, UK
| | - Charlotte Proby
- Division of Cancer Research, School of Medicine, University of Dundee, Ninewells Hospital & Medical School, Dundee, UK
| | - Colin Moyes
- Department of Pathology, Greater Glasgow and Clyde NHS, Queen Elizabeth University Hospital, Glasgow, UK
| | - Kile Green
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - Katie Best
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
- Department of Dermatology and Newcastle Biomedical Research Centre, Royal Victoria Infirmary, Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Muzlifah Haniffa
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, UK
- Department of Dermatology and Newcastle Biomedical Research Centre, Royal Victoria Infirmary, Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, UK
| | - Marina Botto
- Department of Medicine, Imperial College London, London, UK
| | - Deborah Dunn-Walters
- Faculty of Health and Medical Sciences, School of Biosciences and Medicine, University of Surrey, Guildford, Surrey, UK
| | - Jessica Strid
- Department of Medicine, Imperial College London, London, UK.
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4
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Mensurado S, Rei M, Lança T, Ioannou M, Gonçalves-Sousa N, Kubo H, Malissen M, Papayannopoulos V, Serre K, Silva-Santos B. Tumor-associated neutrophils suppress pro-tumoral IL-17+ γδ T cells through induction of oxidative stress. PLoS Biol 2018; 16:e2004990. [PMID: 29750788 PMCID: PMC5965901 DOI: 10.1371/journal.pbio.2004990] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 05/23/2018] [Accepted: 04/25/2018] [Indexed: 12/15/2022] Open
Abstract
Interleukin 17 (IL-17)–producing γδ T cells (γδ17 T cells) have been recently found to promote tumor growth and metastasis formation. How such γδ17 T-cell responses may be regulated in the tumor microenvironment remains, however, largely unknown. Here, we report that tumor-associated neutrophils can display an overt antitumor role by strongly suppressing γδ17 T cells. Tumor-associated neutrophils inhibited the proliferation of murine CD27− Vγ6+ γδ17 T cells via induction of oxidative stress, thereby preventing them from constituting the major source of pro-tumoral IL-17 in the tumor microenvironment. Mechanistically, we found that low expression of the antioxidant glutathione in CD27− γδ17 T cells renders them particularly susceptible to neutrophil-derived reactive oxygen species (ROS). Consistently, superoxide deficiency, or the administration of a glutathione precursor, rescued CD27− Vγ6+ γδ17 T-cell proliferation in vivo. Moreover, human Vδ1+ γδ T cells, which contain most γδ17 T cells found in cancer patients, also displayed low glutathione levels and were potently inhibited by ROS. This work thus identifies an unanticipated, immunosuppressive yet antitumoral, neutrophil/ROS/γδ17 T-cell axis in the tumor microenvironment. Tumors are infiltrated by many immune cells that influence many aspects of cancer progression and outcome, including tumor growth, invasion of healthy surrounding tissues, formation of metastasis, and response to treatments. Among tumor-infiltrating lymphocytes, γδ T cells play dual functions in the tumor milieu; whereas those that produce the antitumor cytokine interferon-γ are protective, their counterparts that make interleukin 17 (IL-17) support tumor growth. It is therefore critical to understand which mechanisms may limit IL-17–biased γδ T-cell responses. In this study, we unexpectedly found that IL-17+ γδ T cells express very low levels of the antioxidant, glutathione, and are very sensitive to reactive oxygen species (ROS), thus revealing their Achilles’ heel. Indeed, as ROS-producing neutrophils accumulate within tumors, they inhibit IL-17+ γδ T-cell proliferation and thereby suppress their pro-tumoral activities. We extended these findings, obtained in mouse models of cancer, to human γδ T cells and therefore believe that the modulation of local levels of oxidative stress may have important therapeutic implications.
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Affiliation(s)
- Sofia Mensurado
- Instituto de Medicina Molecular João Lobo Antunes (iMM), Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Margarida Rei
- Instituto de Medicina Molecular João Lobo Antunes (iMM), Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Telma Lança
- Instituto de Medicina Molecular João Lobo Antunes (iMM), Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | | | - Natacha Gonçalves-Sousa
- Instituto de Medicina Molecular João Lobo Antunes (iMM), Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Hiroshi Kubo
- Instituto de Medicina Molecular João Lobo Antunes (iMM), Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
| | - Marie Malissen
- Centre d'Immunologie de Marseille-Luminy, Aix-Marseille Université, Inserm, CNRS, Marseille, France
| | | | - Karine Serre
- Instituto de Medicina Molecular João Lobo Antunes (iMM), Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
- * E-mail: (BSS); (KS)
| | - Bruno Silva-Santos
- Instituto de Medicina Molecular João Lobo Antunes (iMM), Faculdade de Medicina, Universidade de Lisboa, Lisboa, Portugal
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- * E-mail: (BSS); (KS)
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5
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Walliser I, Göbel TW. Chicken IL-17A is expressed in αβ and γδ T cell subsets and binds to a receptor present on macrophages, and T cells. Dev Comp Immunol 2018; 81:44-53. [PMID: 29154854 DOI: 10.1016/j.dci.2017.11.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 11/10/2017] [Accepted: 11/10/2017] [Indexed: 06/07/2023]
Abstract
IL-17A as important cytokine in host defense has been analysed intensively and various homologous have been identified. To further gain insight into the functional properties of chicken (gg) IL-17A its expression profile was analysed by intracellular cytokine staining. In splenocytes and peripheral blood mononuclear cells gg IL-17A was detected in subsets of CD4+ T cells and γδ T cells. In contrast the gg IL-17A producing populations in intestinal intraepithelial lymphocytes were characterized as either CD3+CD25+ cells or γδ T cells. Furthermore, using FLAG tagged gg IL-17A, binding to its receptor was demonstrated on the macrophage cell line HD11. In peripheral blood IL-17A binding activity was found on αβ and γδ T cell subsets, monocytes and a distinct population of CD25high cells. Treatment of HD11 cells with gg IL-17A induced IL-6 mRNA expression and nitric oxide production. These results demonstrate the presence of a αβ T helper17 cell subset and IL-17 producing γδ T cells in the chicken.
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Affiliation(s)
- Isabelle Walliser
- Institute for Animal Physiology, Department of Veterinary Sciences, University of Munich, Veterinärstrasse 13, 80539 Munich, Germany
| | - Thomas W Göbel
- Institute for Animal Physiology, Department of Veterinary Sciences, University of Munich, Veterinärstrasse 13, 80539 Munich, Germany.
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6
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Kuhn KA, Schulz HM, Regner EH, Severs EL, Hendrickson JD, Mehta G, Whitney AK, Ir D, Ohri N, Robertson CE, Frank DN, Campbell EL, Colgan SP. Bacteroidales recruit IL-6-producing intraepithelial lymphocytes in the colon to promote barrier integrity. Mucosal Immunol 2018; 11:357-368. [PMID: 28812548 PMCID: PMC5815964 DOI: 10.1038/mi.2017.55] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 05/12/2017] [Indexed: 02/04/2023]
Abstract
Interactions between the microbiota and distal gut are important for the maintenance of a healthy intestinal barrier; dysbiosis of intestinal microbial communities has emerged as a likely contributor to diseases that arise at the level of the mucosa. Intraepithelial lymphocytes (IELs) are positioned within the epithelial barrier, and in the small intestine they function to maintain epithelial homeostasis. We hypothesized that colon IELs promote epithelial barrier function through the expression of cytokines in response to interactions with commensal bacteria. Profiling of bacterial 16S ribosomal RNA revealed that candidate bacteria in the order Bacteroidales are sufficient to promote IEL presence in the colon that in turn produce interleukin-6 (IL-6) in a MyD88 (myeloid differentiation primary response 88)-dependent manner. IEL-derived IL-6 is functionally important in the maintenance of the epithelial barrier as IL-6-/- mice were noted to have increased paracellular permeability, decreased claudin-1 expression, and a thinner mucus gel layer, all of which were reversed by transfer of IL-6+/+ IELs, leading to protection of mice in response to Citrobacter rodentium infection. Therefore, we conclude that microbiota provide a homeostatic role for epithelial barrier function through regulation of IEL-derived IL-6.
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Affiliation(s)
- Kristine A. Kuhn
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Hanna M. Schulz
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Emilie H. Regner
- Division of Gastroenterology, University of Colorado School of Medicine, Aurora CO
| | - Erin L. Severs
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Jason D. Hendrickson
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Gaurav Mehta
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Alyssa K. Whitney
- Division of Gastroenterology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Diana Ir
- Division of Infectious Diseases, University of Colorado School of Medicine, Aurora CO
| | - Neha Ohri
- Division of Rheumatology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Charles E. Robertson
- Division of Infectious Diseases, University of Colorado School of Medicine, Aurora CO
| | - Daniel N. Frank
- Division of Infectious Diseases, University of Colorado School of Medicine, Aurora CO
| | - Eric L. Campbell
- Division of Gastroenterology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
| | - Sean P. Colgan
- Division of Gastroenterology, University of Colorado School of Medicine, Aurora CO
- Mucosal Inflammation Program, University of Colorado School of Medicine, Aurora CO
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7
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Gu S, Sachleben JR, Boughter CT, Nawrocka WI, Borowska MT, Tarrasch JT, Skiniotis G, Roux B, Adams EJ. Phosphoantigen-induced conformational change of butyrophilin 3A1 (BTN3A1) and its implication on Vγ9Vδ2 T cell activation. Proc Natl Acad Sci U S A 2017; 114:E7311-E7320. [PMID: 28807997 PMCID: PMC5584448 DOI: 10.1073/pnas.1707547114] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Human Vγ9Vδ2 T cells respond to microbial infections as well as certain types of tumors. The key initiators of Vγ9Vδ2 activation are small, pyrophosphate-containing molecules called phosphoantigens (pAgs) that are present in infected cells or accumulate intracellularly in certain tumor cells. Recent studies demonstrate that initiation of the Vγ9Vδ2 T cell response begins with sensing of pAg via the intracellular domain of the butyrophilin 3A1 (BTN3A1) molecule. However, it is unknown how downstream events can ultimately lead to T cell activation. Here, using NMR spectrometry and molecular dynamics (MD) simulations, we characterize a global conformational change in the B30.2 intracellular domain of BTN3A1 induced by pAg binding. We also reveal by crystallography two distinct dimer interfaces in the BTN3A1 full-length intracellular domain, which are stable in MD simulations. These interfaces lie in close proximity to the pAg-binding pocket and contain clusters of residues that experience major changes of chemical environment upon pAg binding. This suggests that pAg binding disrupts a preexisting conformation of the BTN3A1 intracellular domain. Using a combination of biochemical, structural, and cellular approaches we demonstrate that the extracellular domains of BTN3A1 adopt a V-shaped conformation at rest, and that locking them in this resting conformation without perturbing their membrane reorganization properties diminishes pAg-induced T cell activation. Based on these results, we propose a model in which a conformational change in BTN3A1 is a key event of pAg sensing that ultimately leads to T cell activation.
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Affiliation(s)
- Siyi Gu
- Department of Biochemistry and Molecular Biophysics, University of Chicago, Chicago, IL 60637
| | - Joseph R Sachleben
- Department of Biochemistry and Molecular Biophysics, University of Chicago, Chicago, IL 60637
- Biomolecular NMR Facility, University of Chicago, Chicago, IL 60637
| | | | - Wioletta I Nawrocka
- Department of Biochemistry and Molecular Biophysics, University of Chicago, Chicago, IL 60637
| | - Marta T Borowska
- Department of Biochemistry and Molecular Biophysics, University of Chicago, Chicago, IL 60637
| | - Jeffrey T Tarrasch
- Life Sciences Institute, University of Michigan Medical School, Ann Arbor, MI 48109
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Georgios Skiniotis
- Life Sciences Institute, University of Michigan Medical School, Ann Arbor, MI 48109
- Department of Biological Chemistry, University of Michigan Medical School, Ann Arbor, MI 48109
| | - Benoît Roux
- Department of Biochemistry and Molecular Biophysics, University of Chicago, Chicago, IL 60637
- Graduate Program in Biophysical Sciences, University of Chicago, Chicago, IL 60637
| | - Erin J Adams
- Department of Biochemistry and Molecular Biophysics, University of Chicago, Chicago, IL 60637;
- Committee on Immunology, University of Chicago, Chicago, IL 60637
- Committee on Cancer Biology, University of Chicago, Chicago, IL 60637
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