1
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McElwee MK, Dileepan T, Mahmud SA, Jenkins MK. The CD4+ T cell repertoire specific for citrullinated peptides shows evidence of immune tolerance. J Exp Med 2023; 220:e20230209. [PMID: 37831103 PMCID: PMC10570851 DOI: 10.1084/jem.20230209] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 07/27/2023] [Accepted: 10/02/2023] [Indexed: 10/14/2023] Open
Abstract
Rheumatoid arthritis occurs most often in people who express HLA-DR molecules containing a five aa "shared epitope" in the β chain. These MHCII molecules preferentially bind citrullinated peptides formed by posttranslational modification of arginine. Citrullinated peptide:HLA-DR complexes may act as arthritis-initiating neo-antigens for CD4+ T cells. Here, we used fluorophore-conjugated HLA-DR tetramers containing citrullinated peptides from human cartilage intermediate layer protein, fibrinogen, vimentin, or enolase 1 to track cognate CD4+ T cells. Immunization of HLA-DR transgenic mice with citrullinated peptides from vimentin or enolase 1 failed to cause any expansion of tetramer-binding cells, whereas immunization with citrullinated peptides from cartilage intermediate layer protein or fibrinogen elicited some expansion. The expanded tetramer-binding populations, however, had lower T helper 1 and higher regulatory T cell frequencies than populations elicited by viral peptides. These results indicate that HLA-DR-bound citrullinated peptides are not neo-antigens and induce varying degrees of immune tolerance that could pose a barrier to rheumatoid arthritis.
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Affiliation(s)
- Matthew K. McElwee
- Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
- Division of Rheumatic and Autoimmune Diseases, Department of Medicine, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Thamotharampillai Dileepan
- Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
- Department of Microbiology and Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Shawn A. Mahmud
- Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
- Division of Pediatric Rheumatology, Allergy and Immunology, Department of Pediatrics, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Marc K. Jenkins
- Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
- Department of Microbiology and Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
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2
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Titcombe PJ, Silva Morales M, Zhang N, Mueller DL. BATF represses BIM to sustain tolerant T cells in the periphery. J Exp Med 2023; 220:e20230183. [PMID: 37862030 PMCID: PMC10588758 DOI: 10.1084/jem.20230183] [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: 01/30/2023] [Revised: 08/13/2023] [Accepted: 10/05/2023] [Indexed: 10/21/2023] Open
Abstract
T cells that encounter self-antigens after exiting the thymus avert autoimmunity through peripheral tolerance. Pathways for this include an unresponsive state known as anergy, clonal deletion, and T regulatory (Treg) cell induction. The transcription factor cues and kinetics that guide distinct peripheral tolerance outcomes remain unclear. Here, we found that anergic T cells are epigenetically primed for regulation by the non-classical AP-1 family member BATF. Tolerized BATF-deficient CD4+ T cells were resistant to anergy induction and instead underwent clonal deletion due to proapoptotic BIM (Bcl2l11) upregulation. During prolonged antigen exposure, BIM derepression resulted in fewer PD-1+ conventional T cells as well as loss of peripherally induced FOXP3+ Treg cells. Simultaneous Batf and Bcl2l11 knockdown meanwhile restored anergic T cell survival and Treg cell maintenance. The data identify the AP-1 nuclear factor BATF as a dominant driver of sustained T cell anergy and illustrate a mechanism for divergent peripheral tolerance fates.
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Affiliation(s)
- Philip J. Titcombe
- Department of Medicine, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Milagros Silva Morales
- Department of Medicine, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Na Zhang
- Department of Medicine, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Daniel L. Mueller
- Department of Medicine, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
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3
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Shao TY, Kinder JM, Harper G, Pham G, Peng Y, Liu J, Gregory EJ, Sherman BE, Wu Y, Iten AE, Hu YC, Russi AE, Erickson JJ, Miller-Handley H, Way SS. Reproductive outcomes after pregnancy-induced displacement of preexisting microchimeric cells. Science 2023; 381:1324-1330. [PMID: 37733857 PMCID: PMC10877202 DOI: 10.1126/science.adf9325] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Accepted: 08/07/2023] [Indexed: 09/23/2023]
Abstract
Pregnancy confers partner-specific protection against complications in future pregnancy that parallel persistence of fetal microchimeric cells (FMcs) in mothers after parturition. We show that preexisting FMcs become displaced by new FMcs during pregnancy and that FMc tonic stimulation is essential for expansion of protective fetal-specific forkhead box P3 (FOXP3)-positive regulatory T cells (Treg cells). Maternal microchimeric cells and accumulation of Treg cells with noninherited maternal antigen (NIMA) specificity are similarly overturned in daughters after pregnancy, highlighting a fixed microchimeric cell niche. Whereas NIMA-specific tolerance is functionally erased by pregnancy, partner-specific resiliency against pregnancy complications persists in mothers despite paternity changes in intervening pregnancy. Persistent fetal tolerance reflects FOXP3 expression plasticity, which allows mothers to more durably remember their babies, whereas daughters forget their mothers with new pregnancy-imprinted immunological memories.
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Affiliation(s)
- Tzu-Yu Shao
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Jeremy M. Kinder
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Gavin Harper
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Giang Pham
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Yanyan Peng
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - James Liu
- Department of Obstetrics and Gynecology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Emily J. Gregory
- Department of Obstetrics and Gynecology, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Bryan E. Sherman
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Yuehong Wu
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Alexandra E. Iten
- Division of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Yueh-Chiang Hu
- Division of Developmental Biology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Abigail E. Russi
- Division of Gastroenterology, Hepatology and Advanced Nutrition, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - John J. Erickson
- Division of Neonatology, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Hilary Miller-Handley
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
- Division of Infectious Diseases, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267, USA
| | - Sing Sing Way
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
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4
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Shin DS, Ratnapriya S, Cashin CN, Kuhn LF, Rahimi RA, Anthony RM, Moon JJ. Lung injury induces a polarized immune response by self-antigen-specific CD4 + Foxp3 + regulatory T cells. Cell Rep 2023; 42:112839. [PMID: 37471223 PMCID: PMC10529088 DOI: 10.1016/j.celrep.2023.112839] [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: 12/22/2022] [Revised: 06/11/2023] [Accepted: 07/05/2023] [Indexed: 07/22/2023] Open
Abstract
Self-antigen-specific T cells are prevalent in the mature adaptive immune system but are regulated through multiple mechanisms of tolerance. However, inflammatory conditions such as tissue injury may allow these T cells to break tolerance and trigger autoimmunity. To understand how the T cell repertoire responds to the presentation of self-antigen under highly stimulatory conditions, we use peptide:major histocompatibility complex (MHC) class II tetramers to track the behavior of endogenous CD4+ T cells with specificity to a lung-expressed self-antigen in mouse models of immune-mediated lung injury. Acute injury results in the exclusive expansion of CD4+ regulatory T cells (Tregs) that is dependent on self-antigen recognition and interleukin-2 (IL-2). Conversely, conventional CD4+ T cells of the same self-antigen specificity remain unresponsive even following Treg ablation. Thus, the self-antigen-specific CD4+ T cell repertoire is poised to serve a regulatory function during acute tissue damage to limit further damage and the possibility of autoimmunity.
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Affiliation(s)
- Daniel S Shin
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Charlestown, MA 02129, USA; Division of Immunology, Boston Children's Hospital, Boston, MA 02115, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Sneha Ratnapriya
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Charlestown, MA 02129, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Creel Ng Cashin
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Charlestown, MA 02129, USA; Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Lucy F Kuhn
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Charlestown, MA 02129, USA
| | - Rod A Rahimi
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Charlestown, MA 02129, USA; Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Harvard Medical School, Boston, MA 02115, USA
| | - Robert M Anthony
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Charlestown, MA 02129, USA; Harvard Medical School, Boston, MA 02115, USA
| | - James J Moon
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy, and Immunology, Massachusetts General Hospital, Charlestown, MA 02129, USA; Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Boston, MA 02114, USA; Harvard Medical School, Boston, MA 02115, USA.
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5
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Pircher H, Pinschewer DD, Boehm T. MHC I tetramer staining tends to overestimate the number of functionally relevant self-reactive CD8 T cells in the preimmune repertoire. Eur J Immunol 2023; 53:e2350402. [PMID: 37179469 DOI: 10.1002/eji.202350402] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 04/19/2023] [Accepted: 05/09/2023] [Indexed: 05/15/2023]
Abstract
Previous studies that used peptide-MHC (pMHC) tetramers (tet) to identify self-specific T cells have questioned the effectiveness of thymic-negative selection. Here, we used pMHCI tet to enumerate CD8 T cells specific for the immunodominant gp33 epitope of lymphocytic choriomeningitis virus glycoprotein (GP) in mice transgenically engineered to express high levels of GP as a self-antigen in the thymus. In GP-transgenic mice (GP+ ), monoclonal P14 TCR+ CD8 T cells that express a GP-specific TCR could not be detected by gp33/Db -tet staining, indicative of their complete intrathymic deletion. By contrast, in the same GP+ mice, substantial numbers of polyclonal CD8 T cells identifiable by gp33/Db -tet were present. The gp33-tet staining profiles of polyclonal T cells from GP+ and GP-negative (GP- ) mice were overlapping, but mean fluorescence intensities were ∼15% lower in cells from GP+ mice. Remarkably, the gp33-tet+ T cells in GP+ mice failed to clonally expand after lymphocytic choriomeningitis virus infection, whereas those of GP- mice did so. In Nur77GFP -reporter mice, dose-dependent responses to gp33 peptide-induced TCR stimulation revealed that gp33-tet+ T cells with high ligand sensitivity are lacking in GP+ mice. Hence, pMHCI tet staining identifies self-specific CD8 T cells but tends to overestimate the number of truly self-reactive cells.
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Affiliation(s)
- Hanspeter Pircher
- Department of Developmental Immunology, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
| | - Daniel D Pinschewer
- Division of Experimental Virology, Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Thomas Boehm
- Department of Developmental Immunology, Max Planck Institute of Immunobiology and Epigenetics, Freiburg im Breisgau, Germany
- Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany
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6
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Shin DS, Ratnapriya S, Cashin CN, Kuhn LF, Rahimi RA, Anthony RM, Moon JJ. Lung injury induces a polarized immune response by self antigen-specific Foxp3 + regulatory T cells. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.09.527896. [PMID: 36798259 PMCID: PMC9934659 DOI: 10.1101/2023.02.09.527896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
Self antigen-specific T cells are prevalent in the mature adaptive immune system, but are regulated through multiple mechanisms of tolerance. However, inflammatory conditions such as tissue injury may provide these T cells with an opportunity to break tolerance and trigger autoimmunity. To understand how the T cell repertoire responds to the presentation of self antigen under highly stimulatory conditions, we used peptide:MHCII tetramers to track the behavior of endogenous CD4 + T cells with specificity to a lung-expressed self antigen in mouse models of immune-mediated lung injury. Acute injury resulted in the exclusive expansion of regulatory T cells (Tregs) that was dependent on self antigen recognition and IL-2. Conversely, conventional T cells of the same self antigen specificity remained unresponsive, even following Treg ablation. Thus, the self antigen-specific T cell repertoire is poised to serve a regulatory function during acute tissue damage to limit further damage and the possibility of autoimmunity.
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7
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Pedersen TK, Brown EM, Plichta DR, Johansen J, Twardus SW, Delorey TM, Lau H, Vlamakis H, Moon JJ, Xavier RJ, Graham DB. The CD4 + T cell response to a commensal-derived epitope transitions from a tolerant to an inflammatory state in Crohn's disease. Immunity 2022; 55:1909-1923.e6. [PMID: 36115338 PMCID: PMC9890645 DOI: 10.1016/j.immuni.2022.08.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2022] [Revised: 05/19/2022] [Accepted: 08/24/2022] [Indexed: 02/03/2023]
Abstract
Reciprocal interactions between host T helper cells and gut microbiota enforce local immunological tolerance and modulate extra-intestinal immunity. However, our understanding of antigen-specific tolerance to the microbiome is limited. Here, we developed a systematic approach to predict HLA class-II-specific epitopes using the humanized bacteria-originated T cell antigen (hBOTA) algorithm. We identified a diverse set of microbiome epitopes spanning all major taxa that are compatible with presentation by multiple HLA-II alleles. In particular, we uncovered an immunodominant epitope from the TonB-dependent receptor SusC that was universally recognized and ubiquitous among Bacteroidales. In healthy human subjects, SusC-reactive T cell responses were characterized by IL-10-dominant cytokine profiles, whereas in patients with active Crohn's disease, responses were associated with elevated IL-17A. Our results highlight the potential of targeted antigen discovery within the microbiome to reveal principles of tolerance and functional transitions during inflammation.
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Affiliation(s)
- Thomas K Pedersen
- Infectious Disease and Microbiome Program, The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Disease Systems Immunology, Department of Biotechnology and Biomedicine, Section for Protein Science and Biotherapeutics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Eric M Brown
- Infectious Disease and Microbiome Program, The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Center for Computational and Integrative Biology, Department of Molecular Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Damian R Plichta
- Infectious Disease and Microbiome Program, The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Joachim Johansen
- Infectious Disease and Microbiome Program, The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Novo Nordisk Foundation Center for Protein Research, Faculty of Health and Medical Sciences, University of Copenhagen, 2200 Copenhagen, Denmark
| | - Shaina W Twardus
- Center for the Study of Inflammatory Bowel Disease, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Toni M Delorey
- Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Helena Lau
- Center for the Study of Inflammatory Bowel Disease, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Hera Vlamakis
- Infectious Disease and Microbiome Program, The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - James J Moon
- Center for Immunology and Inflammatory Diseases and Division of Pulmonary and Critical Care Medicine, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Ramnik J Xavier
- Infectious Disease and Microbiome Program, The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Center for Computational and Integrative Biology, Department of Molecular Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA; Center for the Study of Inflammatory Bowel Disease, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA; Klarman Cell Observatory, Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Center for Microbiome Informatics and Therapeutics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | - Daniel B Graham
- Infectious Disease and Microbiome Program, The Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA; Center for Computational and Integrative Biology, Department of Molecular Biology, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA; Center for the Study of Inflammatory Bowel Disease, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA; Center for Microbiome Informatics and Therapeutics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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8
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Gupta PK, Allocco JB, Fraipont JM, McKeague ML, Wang P, Andrade MS, McIntosh C, Chen L, Wang Y, Li Y, Andrade J, Conejo-Garcia JR, Chong AS, Alegre ML. Reduced Satb1 expression predisposes CD4 + T conventional cells to Treg suppression and promotes transplant survival. Proc Natl Acad Sci U S A 2022; 119:e2205062119. [PMID: 36161903 PMCID: PMC9546564 DOI: 10.1073/pnas.2205062119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Accepted: 08/23/2022] [Indexed: 11/24/2022] Open
Abstract
Limiting CD4+ T cell responses is important to prevent solid organ transplant rejection. In a mouse model of costimulation blockade-dependent cardiac allograft tolerance, we previously reported that alloreactive CD4+ conventional T cells (Tconvs) develop dysfunction, losing proliferative capacity. In parallel, induction of transplantation tolerance is dependent on the presence of regulatory T cells (Tregs). Whether susceptibility of CD4+ Tconvs to Treg suppression is modulated during tolerance induction is unknown. We found that alloreactive Tconvs from transplant tolerant mice had augmented sensitivity to Treg suppression when compared with memory T cells from rejector mice and expressed a transcriptional profile distinct from these memory T cells, including down-regulated expression of the transcription factor Special AT-rich sequence-binding protein 1 (Satb1). Mechanistically, Satb1 deficiency in CD4+ T cells limited their expression of CD25 and IL-2, and addition of Tregs, which express higher levels of CD25 than Satb1-deficient Tconvs and successfully competed for IL-2, resulted in greater suppression of Satb1-deficient than wild-type Tconvs in vitro. In vivo, Satb1-deficient Tconvs were more susceptible to Treg suppression, resulting in significantly prolonged skin allograft survival. Overall, our study reveals that transplantation tolerance is associated with Tconvs' susceptibility to Treg suppression, via modulated expression of Tconv-intrinsic Satb1. Targeting Satb1 in the context of Treg-sparing immunosuppressive therapies might be exploited to improve transplant outcomes.
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Affiliation(s)
- Pawan K. Gupta
- Section of Rheumatology, Department of Medicine, University of Chicago, Chicago, IL 60637
| | - Jennifer B. Allocco
- Section of Rheumatology, Department of Medicine, University of Chicago, Chicago, IL 60637
| | - Jane M. Fraipont
- Section of Rheumatology, Department of Medicine, University of Chicago, Chicago, IL 60637
| | - Michelle L. McKeague
- Section of Rheumatology, Department of Medicine, University of Chicago, Chicago, IL 60637
| | - Peter Wang
- Section of Rheumatology, Department of Medicine, University of Chicago, Chicago, IL 60637
| | - Michael S. Andrade
- Section of Transplantation, Department of Surgery, University of Chicago, Chicago, IL 60637
| | - Christine McIntosh
- Section of Rheumatology, Department of Medicine, University of Chicago, Chicago, IL 60637
| | - Luqiu Chen
- Section of Rheumatology, Department of Medicine, University of Chicago, Chicago, IL 60637
| | - Ying Wang
- Section of Rheumatology, Department of Medicine, University of Chicago, Chicago, IL 60637
| | - Yan Li
- Center for Research Informatics, University of Chicago, Chicago, IL 60637
| | - Jorge Andrade
- Center for Research Informatics, University of Chicago, Chicago, IL 60637
| | - José R. Conejo-Garcia
- Department of Immunology, Moffitt Cancer Center & Research Institute, University of South Florida, Tampa, FL 33612
| | - Anita S. Chong
- Section of Transplantation, Department of Surgery, University of Chicago, Chicago, IL 60637
| | - Maria-Luisa Alegre
- Section of Rheumatology, Department of Medicine, University of Chicago, Chicago, IL 60637
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9
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Bousbaine D, Fisch LI, London M, Bhagchandani P, Rezende de Castro TB, Mimee M, Olesen S, Reis BS, VanInsberghe D, Bortolatto J, Poyet M, Cheloha RW, Sidney J, Ling J, Gupta A, Lu TK, Sette A, Alm EJ, Moon JJ, Victora GD, Mucida D, Ploegh HL, Bilate AM. A conserved Bacteroidetes antigen induces anti-inflammatory intestinal T lymphocytes. Science 2022; 377:660-666. [PMID: 35926021 PMCID: PMC9766740 DOI: 10.1126/science.abg5645] [Citation(s) in RCA: 39] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The microbiome contributes to the development and maturation of the immune system. In response to commensal bacteria, intestinal CD4+ T lymphocytes differentiate into functional subtypes with regulatory or effector functions. The development of small intestine intraepithelial lymphocytes that coexpress CD4 and CD8αα homodimers (CD4IELs) depends on the microbiota. However, the identity of the microbial antigens recognized by CD4+ T cells that can differentiate into CD4IELs remains unknown. We identified β-hexosaminidase, a conserved enzyme across commensals of the Bacteroidetes phylum, as a driver of CD4IEL differentiation. In a mouse model of colitis, β-hexosaminidase-specific lymphocytes protected against intestinal inflammation. Thus, T cells of a single specificity can recognize a variety of abundant commensals and elicit a regulatory immune response at the intestinal mucosa.
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Affiliation(s)
- Djenet Bousbaine
- Microbiology Graduate Program, Massachussetts Institute of Technology (MIT), Cambridge, MA, USA.,Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA.,Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA
| | - Laura I Fisch
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA
| | - Mariya London
- Laboratory of Mucosal Immunology, The Rockefeller University, New York, NY, USA
| | - Preksha Bhagchandani
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA.,Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA
| | - Tiago B Rezende de Castro
- Laboratory of Mucosal Immunology, The Rockefeller University, New York, NY, USA.,Laboratory of Lymphocyte Dynamics, The Rockefeller University, New York, NY, USA
| | - Mark Mimee
- Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA.,Synthetic Biology Center, MIT, Cambridge, MA, USA.,Department of Electrical Engineering and Computer Science, MIT, Cambridge, MA, USA
| | - Scott Olesen
- Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA.,Department of Biological Engineering, MIT, Cambridge, MA, USA
| | - Bernardo S Reis
- Laboratory of Mucosal Immunology, The Rockefeller University, New York, NY, USA
| | - David VanInsberghe
- Microbiology Graduate Program, Massachussetts Institute of Technology (MIT), Cambridge, MA, USA.,Department of Civil and Environmental Engineering, MIT, Cambridge, MA, USA
| | - Juliana Bortolatto
- Laboratory of Lymphocyte Dynamics, The Rockefeller University, New York, NY, USA
| | - Mathilde Poyet
- Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA.,Department of Biological Engineering, MIT, Cambridge, MA, USA
| | - Ross W Cheloha
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA
| | - John Sidney
- Division of Vaccine Discovery, La Jolla Institute for Immunology, La Jolla, CA, USA
| | - Jingjing Ling
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA
| | - Aaron Gupta
- Laboratory of Mucosal Immunology, The Rockefeller University, New York, NY, USA
| | - Timothy K Lu
- Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA.,Synthetic Biology Center, MIT, Cambridge, MA, USA.,Department of Electrical Engineering and Computer Science, MIT, Cambridge, MA, USA
| | - Alessandro Sette
- Division of Vaccine Discovery, La Jolla Institute for Immunology, La Jolla, CA, USA.,Department of Medicine, University of California, San Diego, CA, USA
| | - Eric J Alm
- Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA.,Department of Biological Engineering, MIT, Cambridge, MA, USA
| | - James J Moon
- Center for Immunology and Inflammatory Diseases and Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Gabriel D Victora
- Laboratory of Lymphocyte Dynamics, The Rockefeller University, New York, NY, USA
| | - Daniel Mucida
- Laboratory of Mucosal Immunology, The Rockefeller University, New York, NY, USA.,Howard Hughes Medical Institute, The Rockefeller University, New York NY, USA
| | - Hidde L Ploegh
- Program in Cellular and Molecular Medicine, Boston Children's Hospital, Boston, MA, USA.,Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA
| | - Angelina M Bilate
- Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA.,Laboratory of Mucosal Immunology, The Rockefeller University, New York, NY, USA
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10
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Nelson RW, Chen Y, Venezia OL, Majerus RM, Shin DS, Carrington MN, Yu XG, Wesemann DR, Moon JJ, Luster AD. SARS-CoV-2 epitope-specific CD4 + memory T cell responses across COVID-19 disease severity and antibody durability. Sci Immunol 2022; 7:eabl9464. [PMID: 35857584 PMCID: PMC9097883 DOI: 10.1126/sciimmunol.abl9464] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Accepted: 04/15/2022] [Indexed: 01/14/2023]
Abstract
CD4+ T cells are central to long-term immunity against viruses through the functions of T helper 1 (TH1) and T follicular helper (TFH) cell subsets. To better understand the role of these subsets in coronavirus disease 2019 (COVID-19) immunity, we conducted a longitudinal study of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)-specific CD4+ T cell and antibody responses in convalescent individuals who seroconverted during the first wave of the pandemic in Boston, MA, USA, across a range of COVID-19 disease severities. Analyses of spike (S) and nucleocapsid (N) epitope-specific CD4+ T cells using peptide and major histocompatibility complex class II (pMHCII) tetramers demonstrated expanded populations of T cells recognizing the different SARS-CoV-2 epitopes in most individuals compared with prepandemic controls. Individuals who experienced a milder disease course not requiring hospitalization had a greater percentage of circulating TFH (cTFH) and TH1 cells among SARS-CoV-2-specific cells. Analysis of SARS-CoV-2-specific CD4+ T cells responses in a subset of individuals with sustained anti-S antibody responses after viral clearance also revealed an increased proportion of memory cTFH cells. Our findings indicate that efficient early disease control also predicts favorable long-term adaptive immunity.
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Affiliation(s)
- Ryan W. Nelson
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School; Boston, MA, USA
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School; Boston, MA, USA
| | - Yuezhou Chen
- Department of Medicine, Division of Allergy and Clinical Immunology, Division of Genetics, Brigham and Women’s Hospital, Harvard Medical School; Boston, MA, USA
| | - Olivia L. Venezia
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School; Boston, MA, USA
- Infectious Disease Division, Brigham and Women’s Hospital, Harvard Medical School; Boston, MA, USA
| | | | - Daniel S. Shin
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School; Boston, MA, USA
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School; Boston, MA, USA
| | - MGH COVID-19 Collection & Processing Team†
- Division of Immunology, Boston Children’s Hospital, Harvard Medical School; Boston, MA, USA
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School; Boston, MA, USA
- Department of Medicine, Division of Allergy and Clinical Immunology, Division of Genetics, Brigham and Women’s Hospital, Harvard Medical School; Boston, MA, USA
- Queens University of Charlotte, Charlotte, NC, USA
- Ragon Institute of MGH, MIT and Harvard; Cambridge, MA, USA
- Basic Science Program, Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, MD and Laboratory of Integrative Cancer Immunology, Center for Cancer Research, National Cancer Institute; Bethesda, MD, USA
- Infectious Disease Division, Brigham and Women’s Hospital, Harvard Medical School; Boston, MA, USA
- Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School; Boston, MA, USA
| | - Mary N. Carrington
- Ragon Institute of MGH, MIT and Harvard; Cambridge, MA, USA
- Basic Science Program, Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, MD and Laboratory of Integrative Cancer Immunology, Center for Cancer Research, National Cancer Institute; Bethesda, MD, USA
| | - Xu G. Yu
- Ragon Institute of MGH, MIT and Harvard; Cambridge, MA, USA
- Infectious Disease Division, Brigham and Women’s Hospital, Harvard Medical School; Boston, MA, USA
| | - Duane R. Wesemann
- Department of Medicine, Division of Allergy and Clinical Immunology, Division of Genetics, Brigham and Women’s Hospital, Harvard Medical School; Boston, MA, USA
- Ragon Institute of MGH, MIT and Harvard; Cambridge, MA, USA
| | - James J. Moon
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School; Boston, MA, USA
- Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Harvard Medical School; Boston, MA, USA
| | - Andrew D. Luster
- Center for Immunology and Inflammatory Diseases, Division of Rheumatology, Allergy and Immunology, Massachusetts General Hospital, Harvard Medical School; Boston, MA, USA
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11
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Severance AL, Kinder JM, Xin L, Burg AR, Shao TY, Pham G, Tilburgs T, Goodman WA, Mesiano S, Way SS. Maternal-fetal conflict averted by progesterone- induced FOXP3+ regulatory T cells. iScience 2022; 25:104400. [PMID: 35637736 PMCID: PMC9142685 DOI: 10.1016/j.isci.2022.104400] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 04/26/2022] [Accepted: 05/08/2022] [Indexed: 11/20/2022] Open
Abstract
Pregnancy stimulates an intricately coordinated assortment of physiological changes to accommodate growth of the developing fetus, while simultaneously averting rejection of genetically foreign fetal cells and tissues. Despite increasing evidence that expansion of immune-suppressive maternal regulatory T cells enforces fetal tolerance and protects against pregnancy complications, the pregnancy-associated signals driving this essential adaptation remain poorly understood. Here we show that the female reproductive hormone, progesterone, coordinates immune tolerance by stimulating expansion of FOXP3+ regulatory T cells. Conditional loss of the canonical nuclear progesterone receptor in maternal FOXP3+ regulatory T cells blunts their proliferation and accumulation, which is associated with fetal wastage and decidual infiltration of activated CD8+ T cells. Reciprocally, the synthetic progestin 17α-hydroxyprogesterone caproate (17-OHPC) administered to pregnant mice reinforces fetal tolerance and protects against fetal wastage. These immune modulatory effects of progesterone that promote fetal tolerance establish a molecular link between immunological and other physiological adaptions during pregnancy.
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Affiliation(s)
- Ashley L. Severance
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Jeremy M. Kinder
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Lijun Xin
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Ashley R. Burg
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Tzu-Yu Shao
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Immunology Graduate Program, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Giang Pham
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Tamara Tilburgs
- Division of Immunobiology, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Wendy A. Goodman
- Department of Pathology, Case Western Reserve University, Cleveland, OH, USA
| | - Sam Mesiano
- Department of Obstetrics and Gynecology, Case Western Reserve University, Cleveland, OH, USA
| | - Sing Sing Way
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children’s Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, USA
- Corresponding author
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12
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A fresh look at a neglected regulatory lineage: CD8+Foxp3+ Regulatory T Cells. Immunol Lett 2022; 247:22-26. [DOI: 10.1016/j.imlet.2022.05.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 05/17/2022] [Accepted: 05/17/2022] [Indexed: 12/20/2022]
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13
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Abstract
A high diversity of αβ T cell receptors (TCRs), capable of recognizing virtually any pathogen but also self-antigens, is generated during T cell development in the thymus. Nevertheless, a strict developmental program supports the selection of a self-tolerant T cell repertoire capable of responding to foreign antigens. The steps of T cell selection are controlled by cortical and medullary stromal niches, mainly composed of thymic epithelial cells and dendritic cells. The integration of important cues provided by these specialized niches, including (a) the TCR signal strength induced by the recognition of self-peptide-MHC complexes, (b) costimulatory signals, and (c) cytokine signals, critically controls T cell repertoire selection. This review discusses our current understanding of the signals that coordinate positive selection, negative selection, and agonist selection of Foxp3+ regulatory T cells. It also highlights recent advances that have unraveled the functional diversity of thymic antigen-presenting cell subsets implicated in T cell selection.
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Affiliation(s)
- Magali Irla
- Centre d'Immunologie de Marseille-Luminy (CIML), CNRS, INSERM, Aix-Marseille Université, Marseille, France;
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14
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Krueger PD, Osum KC, Jenkins MK. CD4 + Memory T-Cell Formation during Type 1 Immune Responses. Cold Spring Harb Perspect Biol 2021; 13:a038141. [PMID: 33903156 PMCID: PMC8635001 DOI: 10.1101/cshperspect.a038141] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Naive CD4+ T cells become memory cells after proliferating in response to their cognate major histocompatibility complex class II (MHCII)-bound peptide and passing through an effector cell stage. The process by which CD4+ memory T cells emerge from the effector cell pool, however, is less well understood than in the case of CD8+ T cells. During certain acute infections, naive CD4+ T cells proliferate and differentiate into various forms of type 1 (Th1) and follicular helper (Tfh) effector cells. We review the evidence that about 10% of the cells in each of these subsets survive to become memory cells that resemble their effector cell precursors. The roles that asymmetric cell division, the TCF-1 transcription factor, metabolic activity, reactive oxygen species, and the IL-7 receptor play in the effector to memory cell transition are discussed. We propose a speculative model in which the metabolic activity needed for rapid clonal expansion also generates toxic products that induce apoptosis in most effector cells. Memory cells then arise from the effector cells in each subset that are at the low end of the metabolic activity spectrum.
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Affiliation(s)
- Peter D Krueger
- Center for Immunology, Department of Microbiology and Immunology, University of Minnesota Medical School, Minneapolis, Minnesota 55455, USA
| | - Kevin C Osum
- Center for Immunology, Department of Microbiology and Immunology, University of Minnesota Medical School, Minneapolis, Minnesota 55455, USA
| | - Marc K Jenkins
- Center for Immunology, Department of Microbiology and Immunology, University of Minnesota Medical School, Minneapolis, Minnesota 55455, USA
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15
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Anderson CC. The historical postulate is not the basis of self‐nonself discrimination: A response to Bretscher's proposal. Scand J Immunol 2021; 94:e13105. [DOI: 10.1111/sji.13105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Revised: 09/05/2021] [Accepted: 09/30/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Colin C. Anderson
- Departments of Surgery and Medical Microbiology and Immunology Alberta Diabetes and Transplant Institutes University of Alberta Edmonton Alberta Canada
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16
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Suah AN, Tran DKV, Khiew SH, Andrade MS, Pollard JM, Jain D, Young JS, Yin D, Chalasani G, Alegre ML, Chong AS. Pregnancy-induced humoral sensitization overrides T cell tolerance to fetus-matched allografts in mice. J Clin Invest 2021; 131:140715. [PMID: 33393512 PMCID: PMC7773355 DOI: 10.1172/jci140715] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 10/02/2020] [Indexed: 12/19/2022] Open
Abstract
Immunological tolerance to semiallogeneic fetuses is necessary to achieving successful first pregnancy and permitting subsequent pregnancies with the same father. Paradoxically, pregnancy is an important cause of sensitization, resulting in the accelerated rejection of offspring-matched allografts. The underlying basis for divergent outcomes following reencounter of the same alloantigens on transplanted organs versus fetuses in postpartum females is incompletely understood. Using a mouse model that allows concurrent tracking of endogenous fetus-specific T and B cell responses in a single recipient, we show that semiallogeneic pregnancies simultaneously induce fetus-specific T cell tolerance and humoral sensitization. Pregnancy-induced antibodies, but not B cells, impeded transplantation tolerance elicited by costimulation blockade to offspring-matched cardiac grafts. Remarkably, in B cell-deficient mice, allogeneic pregnancy enabled the spontaneous acceptance of fetus-matched allografts. The presence of pregnancy-sensitized B cells that cannot secrete antibodies at the time of heart transplantation was sufficient to precipitate rejection and override pregnancy-established T cell tolerance. Thus, while induction of memory B cells and alloantibodies by pregnancies establishes formidable barriers to transplant success for multigravid women, our observations raise the possibility that humoral desensitization will not only improve transplantation outcomes, but also reveal an unexpected propensity of multiparous recipients to achieve tolerance to offspring-matched allografts.
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Affiliation(s)
- Ashley N Suah
- Department of Surgery, University of Chicago, Chicago, Illinois, USA
| | - Dong-Kha V Tran
- Department of Surgery, University of Chicago, Chicago, Illinois, USA
| | - Stella Hw Khiew
- Department of Surgery, University of Chicago, Chicago, Illinois, USA
| | - Michael S Andrade
- Department of Surgery, University of Chicago, Chicago, Illinois, USA
| | - Jared M Pollard
- Department of Surgery, University of Chicago, Chicago, Illinois, USA
| | - Dharmendra Jain
- Department of Surgery, University of Chicago, Chicago, Illinois, USA
| | - James S Young
- Department of Surgery, University of Chicago, Chicago, Illinois, USA
| | - Dengping Yin
- Department of Surgery, University of Chicago, Chicago, Illinois, USA
| | - Geetha Chalasani
- Department of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | | | - Anita S Chong
- Department of Surgery, University of Chicago, Chicago, Illinois, USA
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17
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Dileepan T, Malhotra D, Kotov DI, Kolawole EM, Krueger PD, Evavold BD, Jenkins MK. MHC class II tetramers engineered for enhanced binding to CD4 improve detection of antigen-specific T cells. Nat Biotechnol 2021; 39:943-948. [PMID: 33941928 PMCID: PMC10666075 DOI: 10.1038/s41587-021-00893-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Accepted: 03/12/2021] [Indexed: 12/15/2022]
Abstract
The ability to identify T cells that recognize specific peptide antigens bound to major histocompatibility complex (MHC) molecules has enabled enumeration and molecular characterization of the lymphocytes responsible for cell-mediated immunity. Fluorophore-labeled peptide:MHC class I (p:MHCI) tetramers are well-established reagents for identifying antigen-specific CD8+ T cells by flow cytometry, but efforts to extend the approach to CD4+ T cells have been less successful, perhaps owing to lower binding strength between CD4 and MHC class II (MHCII) molecules. Here we show that p:MHCII tetramers engineered by directed evolution for enhanced CD4 binding outperform conventional tetramers for the detection of cognate T cells. Using the engineered tetramers, we identified about twice as many antigen-specific CD4+ T cells in mice immunized against multiple peptides than when using traditional tetramers. CD4 affinity-enhanced p:MHCII tetramers, therefore, allow direct sampling of antigen-specific CD4+ T cells that cannot be accessed with conventional p:MHCII tetramer technology. These new reagents could provide a deeper understanding of the T cell repertoire.
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Affiliation(s)
- Thamotharampillai Dileepan
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Deepali Malhotra
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
- AstraZeneca, Gaithersburg, MD, USA
| | - Dmitri I Kotov
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
- University of California, Berkeley, Berkeley, CA, USA
| | - Elizabeth M Kolawole
- Department of Pathology, Microbiology and Immunology, University of Utah, Salt Lake City, UT, USA
| | - Peter D Krueger
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA
| | - Brian D Evavold
- Department of Pathology, Microbiology and Immunology, University of Utah, Salt Lake City, UT, USA
| | - Marc K Jenkins
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN, USA.
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18
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Kinder JM, Turner LH, Stelzer IA, Miller-Handley H, Burg A, Shao TY, Pham G, Way SS. CD8 + T Cell Functional Exhaustion Overrides Pregnancy-Induced Fetal Antigen Alloimmunization. Cell Rep 2021; 31:107784. [PMID: 32579916 PMCID: PMC7383938 DOI: 10.1016/j.celrep.2020.107784] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 04/10/2020] [Accepted: 05/27/2020] [Indexed: 12/19/2022] Open
Abstract
Pregnancy necessitates physiological exposure, and often re-exposure, to foreign fetal alloantigens. The consequences after pregnancy are highly varied, with evidence of both alloimmunization and expanded tolerance phenotypes. We show that pregnancy primes the accumulation of fetal-specific maternal CD8+ T cells and their persistence as an activated memory pool after parturition. Cytolysis and the potential for robust secondary expansion occurs with antigen re-encounter in non-reproductive contexts. Comparatively, CDS+ T cell functional exhaustion associated with increased PD-1 and LAG-3 expression occurs with fetal antigen re-stimulation during subsequent pregnancy. PD-L1/LAG-3 neutralization unleashes the activation of fetal-specific CD8+ T cells, causing fetal wastage selectively during secondary but not primary pregnancy. Thus, CD8+ T cells with fetal alloantigen specificity persist in mothers after pregnancy, and protection against fetal wastage in subsequent pregnancies is maintained by their unique susceptibility to functional exhaustion. Together, distinct mechanisms whereby fetal tolerance is maintained during primary compared with subsequent pregnancies are demonstrated. Expecting mothers are immunologically aware of, but do not reject, genetically foreign tissues of the developing fetus. Comparing tolerance occuring during first and subsequent pregnancies, Kinder et al. show that activated memory CD8+ T cells primed by prior pregnancy are uniquely prone to functional exhaustion with fetal antigen re-stimulation.
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Affiliation(s)
- Jeremy M Kinder
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA.
| | - Lucien H Turner
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Ina A Stelzer
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Hilary Miller-Handley
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Ashley Burg
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Tzu-Yu Shao
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA; Immunology Graduate Program, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Giang Pham
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA
| | - Sing Sing Way
- Division of Infectious Diseases, Center for Inflammation and Tolerance, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH 45229, USA.
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19
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Khatun A, Kasmani MY, Zander R, Schauder DM, Snook JP, Shen J, Wu X, Burns R, Chen YG, Lin CW, Williams MA, Cui W. Single-cell lineage mapping of a diverse virus-specific naive CD4 T cell repertoire. J Exp Med 2021; 218:e20200650. [PMID: 33201171 PMCID: PMC7676493 DOI: 10.1084/jem.20200650] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 08/24/2020] [Accepted: 10/22/2020] [Indexed: 12/21/2022] Open
Abstract
Tracking how individual naive T cells from a natural TCR repertoire clonally expand, differentiate, and make lineage choices in response to an infection has not previously been possible. Here, using single-cell sequencing technology to identify clones by their unique TCR sequences, we were able to trace the clonal expansion, differentiation trajectory, and lineage commitment of individual virus-specific CD4 T cells during an acute lymphocytic choriomeningitis virus (LCMV) infection. Notably, we found previously unappreciated clonal diversity and cellular heterogeneity among virus-specific helper T cells. Interestingly, although most naive CD4 T cells gave rise to multiple lineages at the clonal level, ∼28% of naive cells exhibited a preferred lineage choice toward either Th1 or TFH cells. Mechanistically, we found that TCR structure, in particular the CDR3 motif of the TCR α chain, skewed lineage decisions toward the TFH cell fate.
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Affiliation(s)
- Achia Khatun
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI
- Blood Research Institute, Versiti Wisconsin, Milwaukee, WI
| | - Moujtaba Y. Kasmani
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI
- Blood Research Institute, Versiti Wisconsin, Milwaukee, WI
| | - Ryan Zander
- Blood Research Institute, Versiti Wisconsin, Milwaukee, WI
| | - David M. Schauder
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI
- Blood Research Institute, Versiti Wisconsin, Milwaukee, WI
| | - Jeremy P. Snook
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
| | - Jian Shen
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI
- Blood Research Institute, Versiti Wisconsin, Milwaukee, WI
| | - Xiaopeng Wu
- Blood Research Institute, Versiti Wisconsin, Milwaukee, WI
| | - Robert Burns
- Blood Research Institute, Versiti Wisconsin, Milwaukee, WI
| | - Yi-Guang Chen
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI
- Max McGee National Research Center for Juvenile Diabetes, Medical College of Wisconsin, Milwaukee, WI
| | - Chien-Wei Lin
- Institute for Health and Equity, Division of Biostatistics, Medical College of Wisconsin, Milwaukee, WI
| | - Matthew A. Williams
- Division of Microbiology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT
| | - Weiguo Cui
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI
- Blood Research Institute, Versiti Wisconsin, Milwaukee, WI
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20
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Willis RA, Ramachandiran V, Shires JC, Bai G, Jeter K, Bell DL, Han L, Kazarian T, Ugwu KC, Laur O, Contreras-Alcantara S, Long DL, Altman JD. Production of Class II MHC Proteins in Lentiviral Vector-Transduced HEK-293T Cells for Tetramer Staining Reagents. Curr Protoc 2021; 1:e36. [PMID: 33539685 PMCID: PMC7880703 DOI: 10.1002/cpz1.36] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Class II major histocompatibility complex peptide (MHC-IIp) multimers are precisely engineered reagents used to detect T cells specific for antigens from pathogens, tumors, and self-proteins. While the related Class I MHC/peptide (MHC-Ip) multimers are usually produced from subunits expressed in E. coli, most Class II MHC alleles cannot be produced in bacteria, and this has contributed to the perception that MHC-IIp reagents are harder to produce. Herein, we present a robust constitutive expression system for soluble biotinylated MHC-IIp proteins that uses stable lentiviral vector-transduced derivatives of HEK-293T cells. The expression design includes allele-specific peptide ligands tethered to the amino-terminus of the MHC-II β chain via a protease-cleavable linker. Following cleavage of the linker, HLA-DM is used to catalyze efficient peptide exchange, enabling high-throughput production of many distinct MHC-IIp complexes from a single production cell line. Peptide exchange is monitored using either of two label-free methods, native isoelectric focusing gel electrophoresis or matrix-assisted laser desorption/ionization time-of-flight (MALDI-TOF) mass spectrometry of eluted peptides. Together, these methods produce MHC-IIp complexes that are highly homogeneous and that form the basis for excellent MHC-IIp multimer reagents. © 2021 Wiley Periodicals LLC. Basic Protocol 1: Lentivirus production and expression line creation Support Protocol 1: Six-well assay for estimation of production cell line yield Support Protocol 2: Universal ELISA for quantifying proteins with fused leucine zippers and His-tags Basic Protocol 2: Cultures for production of Class II MHC proteins Basic Protocol 3: Purification of Class II MHC proteins by anti-leucine zipper affinity chromatography Alternate Protocol 1: IMAC purification of His-tagged Class II MHC Support Protocol 3: Protein concentration measurements and adjustments Support Protocol 4: Polishing purification by anion-exchange chromatography Support Protocol 5: Estimating biotinylation percentage by streptavidin precipitation Basic Protocol 4: Peptide exchange Basic Protocol 5: Analysis of peptide exchange by matrix-assisted laser desorption/ionization (MALDI) mass spectrometry Alternate Protocol 2: Native isoelectric focusing to validate MHC-II peptide loading Basic Protocol 6: Multimerization Basic Protocol 7: Staining cells with Class II MHC tetramers.
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Affiliation(s)
- Richard A Willis
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - Vasanthi Ramachandiran
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - John C Shires
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - Ge Bai
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - Kelly Jeter
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - Donielle L Bell
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - Lixia Han
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - Tamara Kazarian
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - Kyla C Ugwu
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - Oskar Laur
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Emory Custom Cloning Core Facility, Emory University School of Medicine, Atlanta, Georgia
| | - Susana Contreras-Alcantara
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - Dale L Long
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
| | - John D Altman
- Emory Vaccine Center, Emory University School of Medicine, Atlanta, Georgia
- Yerkes National Primate Research Center, Atlanta, Georgia
- Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia
- Center for AIDS Research, Emory University, Atlanta, Georgia
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21
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Umeshappa CS, Mbongue J, Singha S, Mohapatra S, Yamanouchi J, Lee JA, Nanjundappa RH, Shao K, Christen U, Yang Y, Ellestad KK, Santamaria P. Ubiquitous antigen-specific T regulatory type 1 cells variably suppress hepatic and extrahepatic autoimmunity. J Clin Invest 2020; 130:1823-1829. [PMID: 32125290 DOI: 10.1172/jci130670] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 01/03/2020] [Indexed: 01/21/2023] Open
Abstract
Peptide MHC class II-based (pMHCII-based) nanomedicines trigger the formation of multicellular regulatory networks by reprogramming autoantigen-experienced CD4+ T cells into autoimmune disease-suppressing T regulatory type 1 (TR1) cells. We have shown that pMHCII-based nanomedicines displaying liver autoimmune disease-relevant yet ubiquitously expressed antigens can blunt various liver autoimmune disorders in a non-disease-specific manner without suppressing local or systemic immunity against infectious agents or cancer. Here, we show that such ubiquitous autoantigen-specific T cells are also awakened by extrahepatic tissue damage and that the corresponding TR1 progeny can suppress experimental autoimmune encephalomyelitis (EAE) and pancreatic β cell autoreactivity. In mice having EAE, nanomedicines displaying either ubiquitous or CNS-specific epitopes triggered the formation and expansion of cognate TR1 cells and their recruitment to the CNS-draining lymph nodes, sparing their liver-draining counterparts. Surprisingly, in mice having both liver autoimmunity and EAE, liver inflammation sequestered these ubiquitous or even CNS-specific TR1 cells away from the CNS, abrogating their antiencephalitogenic activity. In these mice, only the ubiquitous antigen-specific TR1 cells suppressed liver autoimmunity. Thus, the scope of antigen spreading in autoimmune disorders is larger than previously anticipated, involving specificities expected to be silenced by mechanisms of tolerance; the regulatory activity, but not the retention of autoreactive TR1 cells, requires local autoantigen expression.
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Affiliation(s)
- Channakeshava Sokke Umeshappa
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Jacques Mbongue
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Santiswarup Singha
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Saswat Mohapatra
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Jun Yamanouchi
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Justin A Lee
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Roopa Hebbandi Nanjundappa
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Kun Shao
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Urs Christen
- Pharmazentrum Frankfurt, Klinikum der Goethe Universität Frankfurt, Frankfurt, Germany
| | - Yang Yang
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada.,Department of Biochemistry and Molecular Biology, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Kristofor K Ellestad
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Pere Santamaria
- Julia McFarlane Diabetes Research Centre (JMDRC) and Department of Microbiology, Immunology and Infectious Diseases, Snyder Institute for Chronic Diseases and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Alberta, Canada.,Institut D'Investigacions Biomèdiques August Pi i Sunyer, Barcelona, Spain
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22
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Sheikh AA, Cooper L, Feng M, Souza-Fonseca-Guimaraes F, Lafouresse F, Duckworth BC, Huntington ND, Moon JJ, Pellegrini M, Nutt SL, Belz GT, Good-Jacobson KL, Groom JR. Context-Dependent Role for T-bet in T Follicular Helper Differentiation and Germinal Center Function following Viral Infection. Cell Rep 2020; 28:1758-1772.e4. [PMID: 31412245 PMCID: PMC6711398 DOI: 10.1016/j.celrep.2019.07.034] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 05/29/2019] [Accepted: 07/11/2019] [Indexed: 12/03/2022] Open
Abstract
Following infection, inflammatory cues upregulate core transcriptional programs to establish pathogen-specific protection. In viral infections, T follicular helper (TFH) cells express the prototypical T helper 1 transcription factor T-bet. Several studies have demonstrated essential but conflicting roles for T-bet in TFH biology. Understanding the basis of this controversy is crucial, as modulation of T-bet expression instructs TFH differentiation and ultimately protective antibody responses. Comparing influenza and LCMV viral infections, we demonstrate that the role of T-bet is contingent on the environmental setting of TFH differentiation, IL-2 signaling, and T cell competition. Furthermore, we demonstrate that T-bet expression by either TFH or GC B cells independently drives antibody isotype class switching. Specifically, T cell-specific loss of T-bet promotes IgG1, whereas B cell-specific loss of T-bet inhibits IgG2a/c switching. Combined, this work highlights that the context-dependent induction of T-bet instructs the development of protective, neutralizing antibodies following viral infection or vaccination. Shiekh et al. show that, in influenza and LCMV infections, the role of the transcription factor T-bet in TFH differentiation is contingent on environmental cues, IL-2 signaling, and T cell competition. Cell-specific T-bet expression independently drives antibody isotype class switching. Therefore T-bet instructs immune protection in a context-dependent manner.
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Affiliation(s)
- Amania A Sheikh
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Lucy Cooper
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Meiqi Feng
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Fernando Souza-Fonseca-Guimaraes
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Fanny Lafouresse
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Centre de Recherches en Cancérologie de Toulouse, INSERM U1037, Equipe labellisée Ligue Nationale contre le cancer, Université de Toulouse III-Paul Sabatier, Toulouse, France
| | - Brigette C Duckworth
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Nicholas D Huntington
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia; Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - James J Moon
- Center for Immunology and Inflammatory Diseases, and Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, and Harvard Medical School, Charlestown, MA 02129, USA
| | - Marc Pellegrini
- Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia; Division of Infection and Immunity, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia
| | - Stephen L Nutt
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Gabrielle T Belz
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia
| | - Kim L Good-Jacobson
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, VIC 3800, Australia; Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia
| | - Joanna R Groom
- Division of Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia; Department of Medical Biology, University of Melbourne, Parkville, VIC 3010, Australia.
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23
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Wing JB, Lim EL, Sakaguchi S. Control of foreign Ag-specific Ab responses by Treg and Tfr. Immunol Rev 2020; 296:104-119. [PMID: 32564426 DOI: 10.1111/imr.12888] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 05/11/2020] [Accepted: 05/21/2020] [Indexed: 12/15/2022]
Abstract
Regulatory T cells (Tregs) expressing the transcription factor Foxp3 play a critical role in the control of immune homeostasis including the regulation of humoral immunity. Recently, it has become clear that a specialized subset of Tregs, T-follicular regulatory cells (Tfr), have a particular role in the control of T-follicular helper (Tfh) cell-driven germinal center (GC) responses. Following similar differentiation signals as received by Tfh, Tfr gain expression of characteristic chemokine receptors and transcription factors such as CXCR5 and BCL6 allowing them to travel to the B-cell follicle and deliver in situ suppression. It seems clear that Tfr are critical for the prevention of autoimmune antibody induction. However, their role in the control of foreign antigen-specific antibody responses appears more complex with various reports demonstrating either increased or decreased antigen-specific antibody responses following inhibition of Tfr function. Due to their recent discovery, our understanding of Tfr formation and function still has many gaps. In this review, we discuss our current knowledge of both Tregs and Tfr in the context of humoral immunity and how these cells might be manipulated in order to better control vaccine responses.
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Affiliation(s)
- James B Wing
- Laboritory of Human Immunology (Single Cell Immunology), Immunology Frontier Research Center, Osaka University, Suita, Japan
| | - Ee Lyn Lim
- Laboratory of Experimental Immunology, Immunology Frontier Research Center, Osaka University, Suita, Japan
| | - Shimon Sakaguchi
- Laboratory of Experimental Immunology, Immunology Frontier Research Center, Osaka University, Suita, Japan.,Department of Experimental Pathology, Institute for Frontier Medical Sciences, Kyoto University, Kyoto, Japan
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24
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Ansaldo E, Slayden LC, Ching KL, Koch MA, Wolf NK, Plichta DR, Brown EM, Graham DB, Xavier RJ, Moon JJ, Barton GM. Akkermansia muciniphila induces intestinal adaptive immune responses during homeostasis. Science 2020; 364:1179-1184. [PMID: 31221858 DOI: 10.1126/science.aaw7479] [Citation(s) in RCA: 324] [Impact Index Per Article: 81.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 05/29/2019] [Indexed: 12/13/2022]
Abstract
Intestinal adaptive immune responses influence host health, yet only a few intestinal bacteria species that induce cognate adaptive immune responses during homeostasis have been identified. Here, we show that Akkermansia muciniphila, an intestinal bacterium associated with systemic effects on host metabolism and PD-1 checkpoint immunotherapy, induces immunoglobulin G1 (IgG1) antibodies and antigen-specific T cell responses in mice. Unlike previously characterized mucosal responses, T cell responses to A. muciniphila are limited to T follicular helper cells in a gnotobiotic setting, without appreciable induction of other T helper fates or migration to the lamina propria. However, A. muciniphila-specific responses are context dependent and adopt other fates in conventional mice. These findings suggest that, during homeostasis, contextual signals influence T cell responses to the microbiota and modulate host immune function.
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Affiliation(s)
- Eduard Ansaldo
- Division of Immunology and Pathogenesis, Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA
| | - Leianna C Slayden
- Division of Immunology and Pathogenesis, Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA
| | - Krystal L Ching
- Division of Immunology and Pathogenesis, Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA
| | - Meghan A Koch
- Division of Immunology and Pathogenesis, Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA
| | - Natalie K Wolf
- Division of Immunology and Pathogenesis, Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA
| | | | - Eric M Brown
- Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Daniel B Graham
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.,Center for Computational and Integrative Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.,Department of Molecular Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.,Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA
| | - Ramnik J Xavier
- Broad Institute of MIT and Harvard, Cambridge, MA, USA.,Center for Computational and Integrative Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.,Department of Molecular Biology, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.,Center for Microbiome Informatics and Therapeutics, MIT, Cambridge, MA, USA
| | - James J Moon
- Center for Immunology and Inflammatory Diseases and Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA
| | - Gregory M Barton
- Division of Immunology and Pathogenesis, Department of Molecular and Cell Biology, University of California, Berkeley, CA, USA.
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25
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Abstract
Foxp3-expressing CD4+ regulatory T (Treg) cells play key roles in the prevention of autoimmunity and the maintenance of immune homeostasis and represent a major barrier to the induction of robust antitumor immune responses. Thus, a clear understanding of the mechanisms coordinating Treg cell differentiation is crucial for understanding numerous facets of health and disease and for developing approaches to modulate Treg cells for clinical benefit. Here, we discuss current knowledge of the signals that coordinate Treg cell development, the antigen-presenting cell types that direct Treg cell selection, and the nature of endogenous Treg cell ligands, focusing on evidence from studies in mice. We also highlight recent advances in this area and identify key unanswered questions.
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Affiliation(s)
- Peter A Savage
- Department of Pathology, University of Chicago, Chicago, Illinois 60637, USA; , ,
| | - David E J Klawon
- Department of Pathology, University of Chicago, Chicago, Illinois 60637, USA; , ,
| | - Christine H Miller
- Department of Pathology, University of Chicago, Chicago, Illinois 60637, USA; , ,
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26
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Czaja AJ. Examining pathogenic concepts of autoimmune hepatitis for cues to future investigations and interventions. World J Gastroenterol 2019; 25:6579-6606. [PMID: 31832000 PMCID: PMC6906207 DOI: 10.3748/wjg.v25.i45.6579] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 11/25/2019] [Accepted: 11/29/2019] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Multiple pathogenic mechanisms have been implicated in autoimmune hepatitis, but they have not fully explained susceptibility, triggering events, and maintenance or escalation of the disease. Furthermore, they have not identified a critical defect that can be targeted. The goals of this review are to examine the diverse pathogenic mechanisms that have been considered in autoimmune hepatitis, indicate investigational opportunities to validate their contribution, and suggest interventions that might evolve to modify their impact. English abstracts were identified in PubMed by multiple search terms. Full length articles were selected for review, and secondary and tertiary bibliographies were developed. Genetic and epigenetic factors can affect susceptibility by influencing the expression of immune regulatory genes. Thymic dysfunction, possibly related to deficient production of programmed cell death protein-1, can allow autoreactive T cells to escape deletion, and alterations in the intestinal microbiome may help overcome immune tolerance and affect gender bias. Environmental factors may trigger the disease or induce epigenetic changes in gene function. Molecular mimicry, epitope spread, bystander activation, neo-antigen production, lymphocytic polyspecificity, and disturbances in immune inhibitory mechanisms may maintain or escalate the disease. Interventions that modify epigenetic effects on gene expression, alter intestinal dysbiosis, eliminate deleterious environmental factors, and target critical pathogenic mechanisms are therapeutic possibilities that might reduce risk, individualize management, and improve outcome. In conclusion, diverse pathogenic mechanisms have been implicated in autoimmune hepatitis, and they may identify a critical factor or sequence that can be validated and used to direct future management and preventive strategies.
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Affiliation(s)
- Albert J Czaja
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, MN 55905, United States
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27
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Thomas PG, Crawford JC. Selected before selection: A case for inherent antigen bias in the T cell receptor repertoire. ACTA ACUST UNITED AC 2019; 18:36-43. [PMID: 32601606 DOI: 10.1016/j.coisb.2019.10.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
T cell receptor recombination is frequently described as a random or semi-random process that belies the now well-established principle that recombination is extremely biased towards the generation of particular receptor chains. Here we describe the experimental and theoretical work arising from new TCR repertoire sequencing approaches, including the recognition of high rates of public receptors across individuals, estimates of the size and distribution of receptors in the naive repertoire, and the roles of evolutionary, thymic, and peripheral selection in generating public, pathogen-specific responses. Molecular studies of recombination that have identified epigenetic, transcriptional, and topological contributions to variable segment usage are presented as examples of possible mechanisms shaped by natural selection to bias the TCR repertoire. Lastly, we suggest experimental approaches that might contribute to resolving some of the controversies in these areas.
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Affiliation(s)
- Paul G Thomas
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105
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28
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Resilience of T cell-intrinsic dysfunction in transplantation tolerance. Proc Natl Acad Sci U S A 2019; 116:23682-23690. [PMID: 31685610 DOI: 10.1073/pnas.1910298116] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Following antigen stimulation, naïve T cells differentiate into memory cells that mediate antigen clearance more efficiently upon repeat encounter. Donor-specific tolerance can be achieved in a subset of transplant recipients, but some of these grafts are rejected after years of stability, often following infections. Whether T cell memory can develop from a tolerant state and whether these formerly tolerant patients develop antidonor memory is not known. Using a mouse model of cardiac transplantation in which donor-specific tolerance is induced with costimulation blockade (CoB) plus donor-specific transfusion (DST), we have previously shown that systemic infection with Listeria monocytogenes (Lm) months after transplantation can erode or transiently abrogate established tolerance. In this study, we tracked donor-reactive T cells to investigate whether memory can be induced when alloreactive T cells are activated in the setting of tolerance. We show alloreactive T cells persist after induction of cardiac transplantation tolerance, but fail to acquire a memory phenotype despite becoming antigen experienced. Instead, donor-reactive T cells develop T cell-intrinsic dysfunction evidenced when removed from the tolerant environment. Notably, Lm infection after tolerance did not rescue alloreactive T cell memory differentiation or functionality. CoB and antigen persistence were sufficient together but not separately to achieve alloreactive T cell dysfunction, and conventional immunosuppression could substitute for CoB. Antigen persistence was required, as early but not late surgical allograft removal precluded the acquisition of T cell dysfunction. Our results demonstrate transplant tolerance-associated T cell-intrinsic dysfunction that is resistant to memory development even after Lm-mediated disruption of tolerance.
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29
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Cebula A, Kuczma M, Szurek E, Pietrzak M, Savage N, Elhefnawy WR, Rempala G, Kraj P, Ignatowicz L. Dormant pathogenic CD4 + T cells are prevalent in the peripheral repertoire of healthy mice. Nat Commun 2019; 10:4882. [PMID: 31653839 PMCID: PMC6814812 DOI: 10.1038/s41467-019-12820-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 09/25/2019] [Indexed: 01/09/2023] Open
Abstract
Thymic central tolerance eliminates most immature T cells with autoreactive T cell receptors (TCR) that recognize self MHC/peptide complexes. Regardless, an unknown number of autoreactive CD4+Foxp3- T cells escape negative selection and in the periphery require continuous suppression by CD4+Foxp3+ regulatory cells (Tregs). Here, we compare immune repertoires of Treg-deficient and Treg-sufficient mice to find Tregs continuously constraining one-third of mature CD4+Foxp3- cells from converting to pathogenic effectors in healthy mice. These dormant pathogenic clones frequently express TCRs activatable by ubiquitous autoantigens presented by class II MHCs on conventional dendritic cells, including self-peptides that select them in the thymus. Our data thus suggest that identification of most potentially autoreactive CD4+ T cells in the peripheral repertoire is critical to harness or redirect these cells for therapeutic advantage.
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Affiliation(s)
- Anna Cebula
- Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA
| | - Michal Kuczma
- Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA
| | - Edyta Szurek
- Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA
| | - Maciej Pietrzak
- Mathematical Biosciences Institute, Ohio State University, Columbus, OH, USA
| | - Natasha Savage
- Department of Pathology, Augusta University, Augusta, GA, USA
| | - Wessam R Elhefnawy
- Department of Computer Science, Old Dominion University, Norfolk, VA, USA
| | - Grzegorz Rempala
- Mathematical Biosciences Institute, Ohio State University, Columbus, OH, USA
| | - Piotr Kraj
- Department of Biological Sciences, Old Dominion University, Norfolk, VA, USA
| | - Leszek Ignatowicz
- Institute for Biomedical Sciences, Georgia State University, Atlanta, GA, USA.
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30
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Zhang Z, Legoux FP, Vaughan SW, Moon JJ. Opposing peripheral fates of tissue-restricted self antigen-specific conventional and regulatory CD4 + T cells. Eur J Immunol 2019; 50:63-72. [PMID: 31580477 DOI: 10.1002/eji.201948180] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Revised: 07/29/2019] [Accepted: 09/27/2019] [Indexed: 11/08/2022]
Abstract
The development of self antigen-specific T cells is influenced by how the self antigen is expressed. Here, we created a mouse in which a model self antigen is conditionally expressed in different tissue environments. Using peptide:MHCII tetramer-based cell enrichment methods, we examined the development of corresponding endogenous self antigen-specific CD4+ T cell populations. While ubiquitous self antigen expression resulted in efficient deletion of self antigen-specific T cells in the thymus, some tissue-restricted expression patterns resulted in partial deletion of the population in peripheral lymphoid organs. Deletion specifically affected Foxp3- conventional T cells (Tconv) with a bias towards high avidity TCR expressing cells in the case of thymic, but not peripheral deletion. In contrast, Foxp3+ Treg exhibited elevated frequencies with increased TCR avidity. T cells surviving deletion were functionally impaired, with Tconv cells exhibiting more impairment than Tregs. Collectively, our results illustrate how postthymic recognition of tissue-restricted self antigens results in opposing developmental fates for Tconv and Treg cell subsets.
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Affiliation(s)
- Zimeng Zhang
- Center for Immunology and Inflammatory Diseases, and Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, and Harvard Medical School, Charlestown, MA, USA.,Program in Immunology, Division of Medical Sciences, Harvard Medical School, Boston, MA, USA
| | - Francois P Legoux
- Center for Immunology and Inflammatory Diseases, and Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, and Harvard Medical School, Charlestown, MA, USA
| | - Spencer W Vaughan
- Center for Immunology and Inflammatory Diseases, and Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, and Harvard Medical School, Charlestown, MA, USA
| | - James J Moon
- Center for Immunology and Inflammatory Diseases, and Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, and Harvard Medical School, Charlestown, MA, USA
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31
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Pastore G, Carraro M, Pettini E, Nolfi E, Medaglini D, Ciabattini A. Optimized Protocol for the Detection of Multifunctional Epitope-Specific CD4 + T Cells Combining MHC-II Tetramer and Intracellular Cytokine Staining Technologies. Front Immunol 2019; 10:2304. [PMID: 31649661 PMCID: PMC6794358 DOI: 10.3389/fimmu.2019.02304] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Accepted: 09/11/2019] [Indexed: 12/20/2022] Open
Abstract
Analysis of multifunctional CD4+ T cells is fundamental for characterizing the immune responses to vaccination or infection. Major histocompatibility complex (MHC)/peptide tetramers represent a powerful technology for the detection of antigen-specific T cells by specific binding to their T-cell receptor, and their combination with functional assays is fundamental for characterizing the antigen-specific immune response. Here we optimized a protocol for the detection of multiple intracellular cytokines within epitope-specific CD4+ T cells identified by the MHC class II tetramer technology. The optimal procedure for assessing the functional activity of tetramer-binding CD4+ T cells was based on the simultaneous intracellular staining with both MHC tetramers and cytokine-specific antibodies upon in vitro restimulation of cells with the vaccine antigen. The protocol was selected among procedures that differently combine the steps of cellular restimulation and tetramer staining with intracellular cytokine labeling. This method can be applied to better understand the complex functional profile of CD4+ T-cell responses upon vaccination or infection.
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Affiliation(s)
| | | | | | | | | | - Annalisa Ciabattini
- Laboratory of Molecular Microbiology and Biotechnology, Department of Medical Biotechnologies, University of Siena, Siena, Italy
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32
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Bacher P, Scheffold A. The effect of regulatory T cells on tolerance to airborne allergens and allergen immunotherapy. J Allergy Clin Immunol 2019; 142:1697-1709. [PMID: 30527063 DOI: 10.1016/j.jaci.2018.10.016] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 10/16/2018] [Accepted: 10/19/2018] [Indexed: 12/16/2022]
Abstract
Forkhead box P3-positive regulatory T (Treg) cells are essential mediators of tolerance against self-antigens and harmless exogenous antigens. Treg cell deficiencies result in multiple autoimmune and allergic syndromes in neonates. How Treg cells affect conventional allergies against aeroantigens, which are restricted to a few specific proteins released from inhaled particles, remains controversial. The hallmarks of antigen-specific loss of tolerance are allergen-specific TH2 cells and IgE. However, difficulties in identifying the rare allergen-specific Treg cells have obscured the cellular basis of tolerance to aeroallergens, which is also a major obstacle for the rational design of novel and more efficient allergen-specific immunotherapies. Recent technological progress allowing characterization of allergen-specific effectors and Treg cells with minimal in vitro manipulation revealed their detailed contribution to tolerance. The data identified inhaled particles as immunodominant Treg cell targets in healthy and allergic subjects. Conversely, the supposed immunodominant major allergens being rapidly released from inhaled particles apparently do not actively induce tolerance but are ignored by the immune system. Here, the partially contradictory data on various allergen-specific T-cell types in healthy subjects, allergic patients, and patients undergoing allergen-specific immunotherapy are discussed and integrated into one model, postulating Treg cell-dependent and Treg cell-independent checkpoints of tolerance and allergy development.
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Affiliation(s)
- Petra Bacher
- Institute for Immunology, Christian-Albrechts-Universität zu Kiel, Kiel, Germany; Institute of Clinical Molecular Biology Christian-Albrechts Universität zu Kiel & Universitätsklinik Schleswig-Holstein, Kiel, Germany
| | - Alexander Scheffold
- Institute for Immunology, Christian-Albrechts-Universität zu Kiel, Kiel, Germany.
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33
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Roe K, Shu GL, Draves KE, Giordano D, Pepper M, Clark EA. Targeting Antigens to CD180 but Not CD40 Programs Immature and Mature B Cell Subsets to Become Efficient APCs. THE JOURNAL OF IMMUNOLOGY 2019; 203:1715-1729. [PMID: 31484732 DOI: 10.4049/jimmunol.1900549] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 07/29/2019] [Indexed: 12/16/2022]
Abstract
Targeting Ags to the CD180 receptor activates both B cells and dendritic cells (DCs) to become potent APCs. After inoculating mice with Ag conjugated to an anti-CD180 Ab, B cell receptors were rapidly internalized. Remarkably, all B cell subsets, including even transitional 1 B cells, were programed to process, present Ag, and stimulate Ag-specific CD4+ T cells. Within 24-48 hours, Ag-specific B cells were detectable at T-B borders in the spleen; there, they proliferated in a T cell-dependent manner and induced the maturation of T follicular helper (TFH) cells. Remarkably, immature B cells were sufficient for the maturation of TFH cells after CD180 targeting: TFH cells were induced in BAFFR-/- mice (with only transitional 1 B cells) and not in μMT mice (lacking all B cells) following CD180 targeting. Unlike CD180 targeting, CD40 targeting only induced DCs but not B cells to become APCs and thus failed to efficiently induce TFH cell maturation, resulting in slower and lower-affinity IgG Ab responses. CD180 targeting induces a unique program in Ag-specific B cells and to our knowledge, is a novel strategy to induce Ag presentation in both DCs and B cells, especially immature B cells and thus has the potential to produce a broad range of Ab specificities. This study highlights the ability of immature B cells to present Ag to and induce the maturation of cognate TFH cells, providing insights toward vaccination of mature B cell-deficient individuals and implications in treating autoimmune disorders.
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Affiliation(s)
- Kelsey Roe
- Department of Immunology, University of Washington, Seattle, WA 98109
| | - Geraldine L Shu
- Department of Immunology, University of Washington, Seattle, WA 98109
| | - Kevin E Draves
- Department of Immunology, University of Washington, Seattle, WA 98109
| | - Daniela Giordano
- Department of Immunology, University of Washington, Seattle, WA 98109
| | - Marion Pepper
- Department of Immunology, University of Washington, Seattle, WA 98109
| | - Edward A Clark
- Department of Immunology, University of Washington, Seattle, WA 98109
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34
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Inventories of naive and tolerant mouse CD4 T cell repertoires reveal a hierarchy of deleted and diverted T cell receptors. Proc Natl Acad Sci U S A 2019; 116:18537-18543. [PMID: 31451631 PMCID: PMC6744931 DOI: 10.1073/pnas.1907615116] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Deletion or Treg cell differentiation are alternative fates of autoreactive MHCII-restricted thymocytes. How these different modes of tolerance determine the size and composition of polyclonal cohorts of autoreactive T cells with shared specificity is poorly understood. We addressed how tolerance to a naturally expressed autoantigen of the central nervous system shapes the CD4 T cell repertoire. Specific cells in the tolerant peripheral repertoire either were Foxp3+ or displayed anergy hallmarks and, surprisingly, were at least as frequent as in the nontolerant repertoire. Despite this apparent lack of deletional tolerance, repertoire inventories uncovered that some T cell receptors (TCRs) were lost from the CD4 T cell pool, whereas others mediated Treg cell differentiation. The antigen responsiveness of these TCRs supported an affinity model of central tolerance. Importantly, the contribution of different diverter TCRs to the nascent thymic Treg cell population reflected their antigen reactivity rather than their frequency among precursors. This reveals a multilayered TCR hierarchy in CD4 T cell tolerance that separates deleted and diverted TCRs and assures that the Treg cell compartment is filled with cells of maximal permissive antigen reactivity.
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35
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Czaja AJ. Immune inhibitory proteins and their pathogenic and therapeutic implications in autoimmunity and autoimmune hepatitis. Autoimmunity 2019; 52:144-160. [PMID: 31298041 DOI: 10.1080/08916934.2019.1641200] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Key inhibitory proteins can blunt immune responses to self-antigens, and deficiencies in this repertoire may promote autoimmunity. The goals of this review are to describe the key immune inhibitory proteins, indicate their possible impact on the development of autoimmune disease, especially autoimmune hepatitis, and encourage studies to clarify their pathogenic role and candidacy as therapeutic targets. English abstracts were identified in PubMed by multiple search terms. Full length articles were selected for review, and secondary and tertiary bibliographies were developed. Cytotoxic T lymphocyte antigen-4 impairs ligation of CD28 to B7 ligands on antigen presenting cells and inhibits the adaptive immune response by increasing anti-inflammatory cytokines, generating regulatory T cells, and reducing T cell activation and proliferation. Programed cell death antigen-1 inhibits T cell selection, activation, and proliferation by binding with two ligands at different phases and locations of the immune response. A soluble alternatively spliced variant of this protein can dampen the inhibitory signal. Autoimmune hepatitis has been associated with polymorphisms of the cytotoxic T lymphocyte antigen-4 gene, reduced hepatic expression of a ligand of programed cell death antigen-1, an interfering soluble variant of this key inhibitory protein, and antibodies against it. Findings have been associated with laboratory indices of liver injury and suboptimal treatment response. Abatacept, belatacept, CD28 blockade, and induction of T cell exhaustion are management considerations that require scrutiny. In conclusion, deficiencies in key immune inhibitory proteins may promote the occurrence of autoimmune diseases, such as autoimmune hepatitis, and emerging interventions may overcome these deficiencies. Investigations should define the nature, impact and management of these inhibitory disturbances in autoimmune hepatitis.
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Affiliation(s)
- Albert J Czaja
- Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science , Rochester , MN , USA
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36
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Keenan CR, Iannarella N, Garnham AL, Brown AC, Kim RY, Horvat JC, Hansbro PM, Nutt SL, Allan RS. Polycomb repressive complex 2 is a critical mediator of allergic inflammation. JCI Insight 2019; 4:127745. [PMID: 31092733 DOI: 10.1172/jci.insight.127745] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Accepted: 04/17/2019] [Indexed: 12/20/2022] Open
Abstract
Strategies that intervene with the development of immune-mediated diseases are urgently needed, as current treatments mostly focus on alleviating symptoms rather than reversing the disease. Targeting enzymes involved in epigenetic modifications to chromatin represents an alternative strategy that has the potential to perturb the function of the lymphocytes that drive the immune response. Here, we report that 2 major epigenetic silencing pathways are increased after T cell activation. By specific inactivation of these molecules in the T cell compartment in vivo, we demonstrate that the polycomb repressive complex 2 (PRC2) is essential for the generation of allergic responses. Furthermore, we show that small-molecule inhibition of the PRC2 methyltransferase, enhancer of zeste homolog 2 (Ezh2), reduces allergic inflammation in mice. Therefore, by systematically surveying the pathways involved in epigenetic gene silencing we have identified Ezh2 as a target for the suppression of allergic disease.
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Affiliation(s)
- Christine R Keenan
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, Victoria, Australia
| | - Nadia Iannarella
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia
| | - Alexandra L Garnham
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, Victoria, Australia
| | - Alexandra C Brown
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and the University of Newcastle, Newcastle, Australia
| | - Richard Y Kim
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and the University of Newcastle, Newcastle, Australia
| | - Jay C Horvat
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and the University of Newcastle, Newcastle, Australia
| | - Philip M Hansbro
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute and the University of Newcastle, Newcastle, Australia.,Centre for Inflammation, Centenary Institute and University of Technology Sydney, Sydney, Australia
| | - Stephen L Nutt
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, Victoria, Australia
| | - Rhys S Allan
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.,Department of Medical Biology, The University of Melbourne, Parkville, Victoria, Australia
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37
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Abraham TS, Flickinger JC, Waldman SA, Snook AE. TCR Retrogenic Mice as a Model To Map Self-Tolerance Mechanisms to the Cancer Mucosa Antigen GUCY2C. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2019; 202:1301-1310. [PMID: 30642983 PMCID: PMC6363846 DOI: 10.4049/jimmunol.1801206] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2018] [Accepted: 12/13/2018] [Indexed: 01/21/2023]
Abstract
Characterizing self-tolerance mechanisms and their failure is critical to understand immune homeostasis, cancer immunity, and autoimmunity. However, examination of self-tolerance mechanisms has relied primarily on transgenic mice expressing TCRs targeting well-characterized, but nonphysiologic, model Ags, such as OVA and hemagglutinin. Identifying TCRs directed against bona fide self-antigens is made difficult by the extraordinary diversity of TCRs and the low prevalence of Ag-specific clones (<10-100 naive cells per organism), limiting dissection of tolerance mechanisms restricting immunity to self-proteins. In this study, we isolated and characterized TCRs recognizing the intestinal epithelial cell receptor and colorectal cancer Ag GUCY2C to establish a model to study self-antigen-specific tolerance mechanisms. GUCY2C-specific CD4+ effector T cells were isolated from immunized, nontolerant Gucy2c -/- mice. Next-generation sequencing identified GUCY2C-specific TCRs, which were engineered into CD4+ T cells in vitro to confirm TCR recognition of GUCY2C. Further, the generation of "retrogenic" mice by reconstitution with TCR-transduced hematopoietic stem cells resulted in normal CD4+ T cell development, responsiveness to immunization, and GUCY2C-induced tolerance in recipient mice, recapitulating observations in conventional models. This retrogenic model can be employed to define self-tolerance mechanisms restricting T and B cell responses to GUCY2C to optimize colorectal cancer immunotherapy without autoimmunity.
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Affiliation(s)
- Tara S Abraham
- Department of Pharmacology and Experimental Therapeutics, Thomas Jefferson University, Philadelphia, PA 19107
| | - John C Flickinger
- Department of Pharmacology and Experimental Therapeutics, Thomas Jefferson University, Philadelphia, PA 19107
| | - Scott A Waldman
- Department of Pharmacology and Experimental Therapeutics, Thomas Jefferson University, Philadelphia, PA 19107
| | - Adam E Snook
- Department of Pharmacology and Experimental Therapeutics, Thomas Jefferson University, Philadelphia, PA 19107
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38
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Antigen-specific regulatory T-cell responses against aeroantigens and their role in allergy. Mucosal Immunol 2018; 11:1537-1550. [PMID: 29858582 DOI: 10.1038/s41385-018-0038-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 04/11/2018] [Accepted: 04/14/2018] [Indexed: 02/04/2023]
Abstract
The mucosal immune system of the respiratory tract is specialized to continuously monitor the external environment and to protect against invading pathogens, while maintaining tolerance to innocuous inhaled particles. Allergies result from a loss of tolerance against harmless antigens characterized by formation of allergen-specific Th2 cells and IgE. Tolerance is often described as a balance between harmful Th2 cells and various types of protective "regulatory" T cells. However, the identity of the protective T cells in healthy vs. allergic individuals or following successful allergen-specific therapy is controversially discussed. Recent technological progress enabling the identification of antigen-specific effector and regulatory T cells has significantly contributed to our understanding of tolerance. Here we discuss the experimental evidence for the various tolerance mechanisms described. We try to integrate the partially contradictory data into a new model proposing different mechanism of tolerance depending on the quality and quantity of the antigens as well as the way of antigen exposure. Understanding the basis of tolerance is essential for the rational design of novel and more efficient immunotherapies.
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39
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DiToro D, Winstead CJ, Pham D, Witte S, Andargachew R, Singer JR, Wilson CG, Zindl CL, Luther RJ, Silberger DJ, Weaver BT, Kolawole EM, Martinez RJ, Turner H, Hatton RD, Moon JJ, Way SS, Evavold BD, Weaver CT. Differential IL-2 expression defines developmental fates of follicular versus nonfollicular helper T cells. Science 2018; 361:361/6407/eaao2933. [PMID: 30213884 DOI: 10.1126/science.aao2933] [Citation(s) in RCA: 154] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 03/25/2018] [Accepted: 08/06/2018] [Indexed: 12/12/2022]
Abstract
In response to infection, naïve CD4+ T cells differentiate into two subpopulations: T follicular helper (TFH) cells, which support B cell antibody production, and non-TFH cells, which enhance innate immune cell functions. Interleukin-2 (IL-2), the major cytokine produced by naïve T cells, plays an important role in the developmental divergence of these populations. However, the relationship between IL-2 production and fate determination remains unclear. Using reporter mice, we found that differential production of IL-2 by naïve CD4+ T cells defined precursors fated for different immune functions. IL-2 producers, which were fated to become TFH cells, delivered IL-2 to nonproducers destined to become non-TFH cells. Because IL-2 production was limited to cells receiving the strongest T cell receptor (TCR) signals, a direct link between TCR-signal strength, IL-2 production, and T cell fate determination has been established.
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Affiliation(s)
- Daniel DiToro
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | - Colleen J Winstead
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | - Duy Pham
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | - Steven Witte
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | - Rakieb Andargachew
- Department of Microbiology and Immunology, Emory University, Atlanta, GA 30322, USA
| | - Jeffrey R Singer
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | - C Garrett Wilson
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | - Carlene L Zindl
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | - Rita J Luther
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | - Daniel J Silberger
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | | | - E Motunrayo Kolawole
- Department of Microbiology and Immunology, Emory University, Atlanta, GA 30322, USA
| | - Ryan J Martinez
- Department of Microbiology and Immunology, Emory University, Atlanta, GA 30322, USA
| | - Henrietta Turner
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | - Robin D Hatton
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA
| | - James J Moon
- Center for Immunology and Inflammatory Diseases, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02129, USA
| | - Sing Sing Way
- Division of Infectious Diseases and Perinatal Institute, Cincinnati Children's Hospital, Cincinnati, OH 45229, USA
| | - Brian D Evavold
- Department of Microbiology and Immunology, Emory University, Atlanta, GA 30322, USA
| | - Casey T Weaver
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL 35203, USA.
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40
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Miller ML, McIntosh CM, Williams JB, Wang Y, Hollinger MK, Isaad NJ, Moon JJ, Gajewski TF, Chong AS, Alegre ML. Distinct Graft-Specific TCR Avidity Profiles during Acute Rejection and Tolerance. Cell Rep 2018; 24:2112-2126. [PMID: 30134172 PMCID: PMC6142813 DOI: 10.1016/j.celrep.2018.07.067] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 06/19/2018] [Accepted: 07/18/2018] [Indexed: 11/17/2022] Open
Abstract
Mechanisms implicated in robust transplantation tolerance at the cellular level can be broadly categorized into those that inhibit alloreactive T cells intrinsically (clonal deletion and dysfunction) or extrinsically through regulation. Here, we investigated whether additional population-level mechanisms control T cells by examining whether therapeutically induced peripheral transplantation tolerance could influence T cell populations' avidity for alloantigens. Whereas T cells with high avidity preferentially accumulated during acute rejection of allografts, the alloreactive T cells in tolerant recipients retained a low-avidity profile, comparable to naive mice despite evidence of activation. These contrasting avidity profiles upon productive versus tolerogenic stimulation were durable and persisted upon alloantigen re-encounter in the absence of any immunosuppression. Thus, peripheral transplantation tolerance involves control of alloreactive T cells at the population level, in addition to the individual cell level. Controlling expansion or eliminating high-affinity, donor-specific T cells long term may be desirable to achieve robust transplantation tolerance in the clinic.
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Affiliation(s)
- Michelle L Miller
- Department of Medicine, Section of Rheumatology, The University of Chicago, Chicago, IL 60637, USA
| | - Christine M McIntosh
- Department of Medicine, Section of Rheumatology, The University of Chicago, Chicago, IL 60637, USA
| | - Jason B Williams
- Department of Pathology, The University of Chicago, Chicago, IL 60637, USA
| | - Ying Wang
- Department of Medicine, Section of Rheumatology, The University of Chicago, Chicago, IL 60637, USA
| | - Maile K Hollinger
- Department of Medicine, Section of Rheumatology, The University of Chicago, Chicago, IL 60637, USA
| | - Noel J Isaad
- Department of Medicine, Section of Rheumatology, The University of Chicago, Chicago, IL 60637, USA
| | - James J Moon
- Center for Immunology and Inflammatory Diseases and Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Charlestown, MA 02129, USA; Harvard Medical School, Charlestown, MA 02129, USA
| | - Thomas F Gajewski
- Department of Pathology, The University of Chicago, Chicago, IL 60637, USA
| | - Anita S Chong
- Department of Surgery, Section of Transplantation, The University of Chicago, Chicago, IL 60637, USA
| | - Maria-Luisa Alegre
- Department of Medicine, Section of Rheumatology, The University of Chicago, Chicago, IL 60637, USA.
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41
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Fazilleau N, Aloulou M. Several Follicular Regulatory T Cell Subsets With Distinct Phenotype and Function Emerge During Germinal Center Reactions. Front Immunol 2018; 9:1792. [PMID: 30150980 PMCID: PMC6100207 DOI: 10.3389/fimmu.2018.01792] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 07/20/2018] [Indexed: 12/27/2022] Open
Abstract
An efficient B cell immunity requires a dynamic equilibrium between positive and negative signals. In germinal centers (GCs), T follicular helper cells are supposed to be the positive regulator while T follicular regulatory (Tfr) cells were assigned to be the negative regulators. Indeed, Tfr cells are considered as a homogenous cell population dedicated to dampen the GC extent. Moreover, Tfr cells prevent autoimmunity since their dysregulation leads to production of self-reactive antibodies (Ab). However, a growing corpus of evidence has revealed additional and unexpected functions for Tfr cells in the regulation of B cell responses. This review provides an overview of the Tfr cell contribution and presents Tfr cell proprieties in the context of vaccination.
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Affiliation(s)
- Nicolas Fazilleau
- Centre de Physiopathologie de Toulouse Purpan, Toulouse, France.,INSERM U1043, Toulouse, France.,CNRS UMR5282, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
| | - Meryem Aloulou
- Centre de Physiopathologie de Toulouse Purpan, Toulouse, France.,INSERM U1043, Toulouse, France.,CNRS UMR5282, Toulouse, France.,Université Toulouse III Paul-Sabatier, Toulouse, France
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42
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Pohar J, Simon Q, Fillatreau S. Antigen-Specificity in the Thymic Development and Peripheral Activity of CD4 +FOXP3 + T Regulatory Cells. Front Immunol 2018; 9:1701. [PMID: 30083162 PMCID: PMC6064734 DOI: 10.3389/fimmu.2018.01701] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 07/10/2018] [Indexed: 01/12/2023] Open
Abstract
CD4+Foxp3+ T regulatory cells (Treg) are essential for the life of the organism, in particular because they protect the host against its own autoaggressive CD4+Foxp3- T lymphocytes (Tconv). Treg distinctively suppress autoaggressive immunity while permitting efficient defense against infectious diseases. This split effect indicates that Treg activity is controlled in an antigen-specific manner. This specificity is achieved first by the formation of the Treg repertoire during their development, and second by their activation in the periphery. This review presents novel information on the antigen-specificity of Treg development in the thymus, and Treg function in the periphery. These aspects have so far remained imprecisely understood due to the lack of knowledge of the actual antigens recognized by Treg during the different steps of their life, so that most previous studies have been performed using artificial antigens. However, recent studies identified some antigens mediating the positive selection of autoreactive Treg in the thymus, and the function of Treg in the periphery in autoimmune and allergic disorders. These investigations emphasized the remarkable specificity of Treg development and function. Indeed, the development of autoreactive Treg in the thymus was found to be mediated by single autoantigens, so that the absence of one antigen led to a dramatic loss of Treg reacting toward that antigen. The specificity of Treg development is important because the constitution of the Treg repertoire, and especially the presence of holes in this repertoire, was found to crucially influence human immunopathology. Indeed, it was found that the development of human immunopathology was permitted by the lack of Treg against the antigens driving the autoimmune or allergic T cell responses rather than by the impairment of Treg activation or function. The specificity of Treg suppression in the periphery is therefore intimately associated with the mechanisms shaping the formation of the Treg repertoire during their development. This novel information refines significantly our understanding of the antigen-specificity of Treg protective function, which is required to envision how these cells distinctively regulate unwanted immune responses as well as for the development of appropriate approaches to optimally harness them therapeutically in autoimmune, malignant, and infectious diseases.
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Affiliation(s)
- Jelka Pohar
- Institut Necker-Enfants Malades, INSERM U1151-CNRS UMR 8253, Paris, France
| | - Quentin Simon
- Institut Necker-Enfants Malades, INSERM U1151-CNRS UMR 8253, Paris, France
| | - Simon Fillatreau
- Institut Necker-Enfants Malades, INSERM U1151-CNRS UMR 8253, Paris, France.,Faculté de Médecine, Université Paris Descartes, Sorbonne Paris Cité, Paris, France.,AP-HP, Hôpital Necker Enfants Malades, Paris, France
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43
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Young JS, Yin D, Vannier AGL, Alegre ML, Chong AS. Equal Expansion of Endogenous Transplant-Specific Regulatory T Cell and Recruitment Into the Allograft During Rejection and Tolerance. Front Immunol 2018; 9:1385. [PMID: 29973932 PMCID: PMC6020780 DOI: 10.3389/fimmu.2018.01385] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2018] [Accepted: 06/04/2018] [Indexed: 01/07/2023] Open
Abstract
Despite numerous advances in the definition of a role for regulatory T cells (Tregs) in facilitating experimental transplantation tolerance, and ongoing clinical trials for Treg-based therapies, critical issues related to the optimum dosage, antigen-specificity, and Treg-friendly adjunct immunosuppressants remain incompletely resolved. In this study, we used a tractable approach of MHC tetramers and flow cytometry to define the fate of conventional (Tconvs) and Tregs CD4+ T cells that recognize donor 2W antigens presented by I-Ab on donor and recipient antigen-presenting cells (APCs) in a mouse cardiac allograft transplant model. Our study shows that these endogenous, donor-reactive Tregs comparably accumulate in the spleens of recipients undergoing acute rejection or exhibiting costimulation blockade-induced tolerance. Importantly, this expansion was not detected when analyzing bulk splenic Tregs. Systemically, the distinguishing feature between tolerance and rejection was the inhibition of donor-reactive conventional T cell (Tconv) expansion in tolerance, translating into increased percentages of splenic FoxP3+ Tregs within the 2W:I-Ab CD4+ T cell subset compared to rejection (~35 vs. <5% in tolerance vs. rejection). We further observed that continuous administration of rapamycin, cyclosporine A, or CTLA4-Ig did not facilitate donor-specific Treg expansion, while all three drugs inhibited Tconv expansion. Finally, donor-specific Tregs accumulated comparably in rejecting tolerant allografts, whereas tolerant grafts harbored <10% of the donor-specific Tconv numbers observed in rejecting allografts. Thus, ~80% of 2W:I-Ab CD4+ T cells in tolerant allografts expressed FoxP3+ compared to ≤10% in rejecting allografts. A similar, albeit lesser, enrichment was observed with bulk graft-infiltrating CD4+ cells, where ~30% were FoxP3+ in tolerant allografts, compared to ≤10% in rejecting allografts. Finally, we assessed that the phenotype of 2W:I-Ab Tregs and observed that the percentages of cells expressing neuropilin-1 and CD73 were significantly higher in tolerance compared to rejection, suggesting that these Tregs may be functionally distinct. Collectively, the analysis of donor-reactive, but not of bulk, Tconvs and Tregs reveal a systemic signature of tolerance that is stable and congruent with the signature within tolerant allografts. Our data also underscore the importance of limiting Tconv expansion for high donor-specific Tregs:Tconv ratios to be successfully attained in transplantation tolerance.
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Affiliation(s)
- James S Young
- Department of Surgery, The University of Chicago, Chicago, IL, United States
| | - Dengping Yin
- Department of Surgery, The University of Chicago, Chicago, IL, United States
| | | | - Maria-Luisa Alegre
- Department of Medicine, The University of Chicago, Chicago, IL, United States
| | - Anita S Chong
- Department of Surgery, The University of Chicago, Chicago, IL, United States
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44
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Kotov DI, Kotov JA, Goldberg MF, Jenkins MK. Many Th Cell Subsets Have Fas Ligand-Dependent Cytotoxic Potential. THE JOURNAL OF IMMUNOLOGY 2018; 200:2004-2012. [PMID: 29436413 DOI: 10.4049/jimmunol.1700420] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 01/12/2018] [Indexed: 11/19/2022]
Abstract
CD4+ Th cells can have cytotoxic activity against cells displaying relevant peptide-MHC class II (p:MHCII) ligands. Cytotoxicity may be a property of Th1 cells and depends on perforin and the Eomes transcription factor. We assessed these assertions for polyclonal p:MHCII-specific CD4+ T cells activated in vivo in different contexts. Mice immunized with an immunogenic peptide in adjuvant or infected with lymphocytic choriomeningitis virus or Listeria monocytogenes bacteria induced cytotoxic Th cells that killed B cells displaying relevant p:MHCII complexes. Cytotoxicity was dependent on Fas expression by target cells but was independent of Eomes or perforin expression by T cells. Although the priming regimens induced different proportions of Th1, Th17, regulatory T cells, and T follicular helper cells, the T cells expressed Fas ligand in all cases. Reciprocally, Fas was upregulated on target cells in a p:MHCII-specific manner. These results indicate that many Th subsets have cytotoxic potential that is enhanced by cognate induction of Fas on target cells.
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Affiliation(s)
- Dmitri I Kotov
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455
| | - Jessica A Kotov
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455
| | - Michael F Goldberg
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455
| | - Marc K Jenkins
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455
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45
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Sánchez-Ramón S, Faure F. The Thymus/Neocortex Hypothesis of the Brain: A Cell Basis for Recognition and Instruction of Self. Front Cell Neurosci 2017; 11:340. [PMID: 29163052 PMCID: PMC5663735 DOI: 10.3389/fncel.2017.00340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Accepted: 10/13/2017] [Indexed: 12/18/2022] Open
Abstract
The recognition of internal and external sources of stimuli, the self from non-self, seems to be an intrinsic property to the adequate functioning of the immune system and the nervous system, both complex network systems that have evolved to safeguard the self biological identity of the organism. The mammalian brain development relies on dynamic and adaptive processes that are now well described. However, the rules dictating this highly constrained developmental process remain elusive. Here we hypothesize that there is a cellular basis for brain selfhood, based on the analogy of the global mechanisms that drive the self/non-self recognition and instruction by the immune system. In utero education within the thymus by multi-step selection processes discard overly low and high affinity T-lymphocytes to self stimuli, thus avoiding expendable or autoreactive responses that might lead to harmful autoimmunity. We argue that the self principle is one of the chief determinants of neocortical brain neurogenesis. According to our hypothesis, early-life education on self at the subcortical plate of the neocortex by selection processes might participate in the striking specificity of neuronal repertoire and assure efficiency and self tolerance. Potential implications of this hypothesis in self-reactive neurological pathologies are discussed, particularly involving consciousness-associated pathophysiological conditions, i.e., epilepsy and schizophrenia, for which we coined the term autophrenity.
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Affiliation(s)
- Silvia Sánchez-Ramón
- Department of Clinical Immunology and IdISSC, Hospital Clínico San Carlos, Madrid, Spain.,Department of Microbiology I, School of Medicine, Complutense University of Madrid, Madrid, Spain
| | - Florence Faure
- PSL Research University, INSERM U932, Institut Curie, Paris, France
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46
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Young JS, Khiew SHW, Yang J, Vannier A, Yin D, Sciammas R, Alegre ML, Chong AS. Successful Treatment of T Cell-Mediated Acute Rejection with Delayed CTLA4-Ig in Mice. Front Immunol 2017; 8:1169. [PMID: 28970838 PMCID: PMC5609110 DOI: 10.3389/fimmu.2017.01169] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 09/04/2017] [Indexed: 12/25/2022] Open
Abstract
Clinical observations that kidney transplant recipients receiving belatacept who experienced T cell-mediated acute rejection can be successfully treated and subsequently maintained on belatacept-based immunosuppression suggest that belatacept is able to control memory T cells. We recently reported that treatment with CTLA4-Ig from day 6 posttransplantation successfully rescues allografts from acute rejection in a BALB/c to C57BL/6 heart transplant model, in part, by abolishing B cell germinal centers and reducing alloantibody titers. Here, we show that CTLA4-Ig is additionally able to inhibit established T cell responses independently of B cells. CTLA4-Ig inhibited the in vivo cytolytic activity of donor-specific CD8+ T cells, and the production of IFNγ by graft-infiltrating T cells. Delayed CTLA4-Ig treatment did not reduce the numbers of graft-infiltrating T cells nor prevented the accumulation of antigen-experienced donor-specific memory T cells in the spleen. Nevertheless, delayed CTLA4-Ig treatment successfully maintained long-term graft acceptance in the majority of recipients that had experienced a rejection crisis, and enabled the acceptance of secondary BALB/c heart grafts transplanted 30 days after the first transplantation. In summary, we conclude that delayed CTLA4-Ig treatment is able to partially halt ongoing T cell-mediated acute rejection. These findings extend the functional efficacy of CTLA4-Ig therapy to effector T cells and provide an explanation for why CTLA4-Ig-based immunosuppression in the clinic successfully maintains long-term graft survival after T cell-mediated rejection.
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Affiliation(s)
- James S Young
- Department of Surgery, Section of Transplantation, The University of Chicago, Chicago, IL, United States
| | - Stella H-W Khiew
- Department of Surgery, Section of Transplantation, The University of Chicago, Chicago, IL, United States
| | - Jinghui Yang
- Department of Surgery, Section of Transplantation, The University of Chicago, Chicago, IL, United States.,Department of Organ Transplantation, Shanghai Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Augustin Vannier
- Department of Surgery, Section of Transplantation, The University of Chicago, Chicago, IL, United States
| | - Dengping Yin
- Department of Surgery, Section of Transplantation, The University of Chicago, Chicago, IL, United States
| | - Roger Sciammas
- Center for Comparative Medicine, University of California, Davis, Davis, CA, United States
| | - Maria-Luisa Alegre
- Department of Medicine, Section of Rheumatology, The University of Chicago, Chicago, IL, United States
| | - Anita S Chong
- Department of Surgery, Section of Transplantation, The University of Chicago, Chicago, IL, United States
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47
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Borrow P, Moody MA. Immunologic characteristics of HIV-infected individuals who make broadly neutralizing antibodies. Immunol Rev 2017; 275:62-78. [PMID: 28133804 PMCID: PMC5299500 DOI: 10.1111/imr.12504] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Induction of broadly neutralizing antibodies (bnAbs) capable of inhibiting infection with diverse variants of human immunodeficiency virus type 1 (HIV‐1) is a key, as‐yet‐unachieved goal of prophylactic HIV‐1 vaccine strategies. However, some HIV‐infected individuals develop bnAbs after approximately 2‐4 years of infection, enabling analysis of features of these antibodies and the immunological environment that enables their induction. Distinct subsets of CD4+ T cells play opposing roles in the regulation of humoral responses: T follicular helper (Tfh) cells support germinal center formation and provide help for affinity maturation and the development of memory B cells and plasma cells, while regulatory CD4+ (Treg) cells including T follicular regulatory (Tfr) cells inhibit the germinal center reaction to limit autoantibody production. BnAbs exhibit high somatic mutation frequencies, long third heavy‐chain complementarity determining regions, and/or autoreactivity, suggesting that bnAb generation is likely to be highly dependent on the activity of CD4+ Tfh cells, and may be constrained by host tolerance controls. This review discusses what is known about the immunological environment during HIV‐1 infection, in particular alterations in CD4+ Tfh, Treg, and Tfr populations and autoantibody generation, and how this is related to bnAb development, and considers the implications for HIV‐1 vaccine design.
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Affiliation(s)
- Persephone Borrow
- Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - M Anthony Moody
- Duke University Human Vaccine Institute and Departments of Pediatrics and Immunology, Duke University School of Medicine, Durham, NC, USA
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48
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Breed ER, Lee ST, Hogquist KA. Directing T cell fate: How thymic antigen presenting cells coordinate thymocyte selection. Semin Cell Dev Biol 2017; 84:2-10. [PMID: 28800929 DOI: 10.1016/j.semcdb.2017.07.045] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 06/30/2017] [Accepted: 07/30/2017] [Indexed: 01/02/2023]
Abstract
The development of a self-tolerant and effective T cell receptor repertoire is dependent on interactions coordinated by various antigen presenting cells (APC) within the thymus. T cell receptor-self-peptide-MHC interactions are essential for determining T cell fate, however different cytokine and co-stimulatory signals provided by the diverse APCs within the thymus are also critical. Here, we outline the different localization and functional capabilities of thymic APCs. We also discuss how these distinct APCs work collectively to facilitate the establishment of a diverse T cell receptor repertoire that is tolerant to an array of different self-antigens.
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Affiliation(s)
- Elise R Breed
- The Center for Immunology, Department of Laboratory Medicine & Pathology, University of Minnesota, Minneapolis, MN, USA
| | - S Thera Lee
- The Center for Immunology, Department of Laboratory Medicine & Pathology, University of Minnesota, Minneapolis, MN, USA
| | - Kristin A Hogquist
- The Center for Immunology, Department of Laboratory Medicine & Pathology, University of Minnesota, Minneapolis, MN, USA.
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49
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Leonard JD, Gilmore DC, Dileepan T, Nawrocka WI, Chao JL, Schoenbach MH, Jenkins MK, Adams EJ, Savage PA. Identification of Natural Regulatory T Cell Epitopes Reveals Convergence on a Dominant Autoantigen. Immunity 2017; 47:107-117.e8. [PMID: 28709804 DOI: 10.1016/j.immuni.2017.06.015] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 05/17/2017] [Accepted: 06/21/2017] [Indexed: 12/15/2022]
Abstract
Regulatory T (Treg) cells expressing the transcription factor Foxp3 are critical for the prevention of autoimmunity and the suppression of anti-tumor immunity. The major self-antigens recognized by Treg cells remain undefined, representing a substantial barrier to the understanding of immune regulation. Here, we have identified natural Treg cell ligands in mice. We found that two recurrent Treg cell clones, one prevalent in prostate tumors and the other associated with prostatic autoimmune lesions, recognized distinct non-overlapping MHC-class-II-restricted peptides derived from the same prostate-specific protein. Notably, this protein is frequently targeted by autoantibodies in experimental models of prostatic autoimmunity. On the basis of these findings, we propose a model in which Treg cell responses at peripheral sites converge on those self-proteins that are most susceptible to autoimmune attack, and we suggest that this link could be exploited as a generalizable strategy for identifying the Treg cell antigens relevant to human autoimmunity.
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Affiliation(s)
- John D Leonard
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA
| | - Dana C Gilmore
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
| | - Thamotharampillai Dileepan
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455, USA
| | - Wioletta I Nawrocka
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA
| | - Jaime L Chao
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
| | - Mary H Schoenbach
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
| | - Marc K Jenkins
- Department of Microbiology and Immunology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455, USA
| | - Erin J Adams
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA.
| | - Peter A Savage
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA.
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50
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Kalekar LA, Mueller DL. Relationship between CD4 Regulatory T Cells and Anergy In Vivo. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2017; 198:2527-2533. [PMID: 28320913 PMCID: PMC5363282 DOI: 10.4049/jimmunol.1602031] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 01/09/2017] [Indexed: 01/13/2023]
Abstract
Selective suppression of effector CD4+ T cell functions is necessary to prevent immune cell-mediated damage to healthy tissues. This appears especially true during pregnancy or in individuals predisposed to autoimmunity. Foxp3+ regulatory T (Treg) cells and induction of anergy, an acquired state of T cell functional unresponsiveness in Foxp3- cells, have both been implicated as mechanisms to suppress dangerous immune responses to tissue-restricted self-Ags. Anergic CD4+ T cells and Treg cells share a number of phenotypic and mechanistic traits-including the expression of CD73 and folate receptor 4, and the epigenetic modification of Treg cell signature genes-and an interesting relationship between these two subsets has recently emerged. In this review, we will compare and contrast these two subsets, as well as explore the role of anergy in the generation of peripheral Treg cells.
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Affiliation(s)
- Lokesh A Kalekar
- Department of Medicine, University of Minnesota Medical School, Minneapolis, MN 55455; and Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455
| | - Daniel L Mueller
- Department of Medicine, University of Minnesota Medical School, Minneapolis, MN 55455; and Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455
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