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Park JY, Won HY, DiPalma DT, Kim HK, Kim TH, Li C, Sato N, Hong C, Abraham N, Gress RE, Park JH. In vivo availability of the cytokine IL-7 constrains the survival and homeostasis of peripheral iNKT cells. Cell Rep 2022; 38:110219. [PMID: 35021100 DOI: 10.1016/j.celrep.2021.110219] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 10/06/2021] [Accepted: 12/14/2021] [Indexed: 11/03/2022] Open
Abstract
Understanding the homeostatic mechanism of invariant natural killer T (iNKT) cells is a critical issue in iNKT cell biology. Because interleukin (IL)-15 is required for the thymic generation of iNKT cells, IL-15 has also been considered necessary for the homeostasis of peripheral iNKT cells. Here, we delineated the in vivo cytokine requirement for iNKT cells, and we came to the surprising conclusion that IL-7, not IL-15, is the homeostatic cytokine for iNKT cells. Employing a series of experimental mouse models where the availability of IL-7 or IL-15 was manipulated in peripheral tissues, either by genetic tools or by adult thymectomy and cytokine pump installation, we demonstrate that the abundance of IL-7, and not IL-15, limits the size of the peripheral iNKT cell pool. These results redefine the cytokine requirement for iNKT cells and indicate competition for IL-7 between iNKT and conventional αβ T cells.
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Affiliation(s)
- Joo-Young Park
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Building 10, Room 5B17, 10 Center Drive, Bethesda, MD 20892, USA; Department of Oral and Maxillofacial Surgery, Seoul National University School of Dentistry, Seoul National University Dental Hospital, 101 Daehakno, Jongno-gu, Seoul 03080, South Korea.
| | - Hee Yeun Won
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Building 10, Room 5B17, 10 Center Drive, Bethesda, MD 20892, USA
| | - Devon T DiPalma
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Building 10, Room 5B17, 10 Center Drive, Bethesda, MD 20892, USA
| | - Hye Kyung Kim
- Experimental Transplantation Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Tae-Hyoun Kim
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Building 10, Room 5B17, 10 Center Drive, Bethesda, MD 20892, USA
| | - Can Li
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Building 10, Room 5B17, 10 Center Drive, Bethesda, MD 20892, USA
| | - Noriko Sato
- Molecular Imaging Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Changwan Hong
- Department of Anatomy, Pusan National University School of Medicine, Yangsan 626-870, South Korea
| | - Ninan Abraham
- Department of Microbiology and Immunology, and Department of Zoology, Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada
| | - Ronald E Gress
- Experimental Transplantation Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 20892, USA
| | - Jung-Hyun Park
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Building 10, Room 5B17, 10 Center Drive, Bethesda, MD 20892, USA.
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2
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Development of αβ T Cells with Innate Functions. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2022; 1365:149-160. [DOI: 10.1007/978-981-16-8387-9_10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Dinh XT, Stanley D, Smith LD, Moreau M, Berzins SP, Gemiarto A, Baxter AG, Jordan MA. Modulation of TCR signalling components occurs prior to positive selection and lineage commitment in iNKT cells. Sci Rep 2021; 11:23650. [PMID: 34880299 PMCID: PMC8655039 DOI: 10.1038/s41598-021-02885-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 11/22/2021] [Indexed: 11/09/2022] Open
Abstract
iNKT cells play a critical role in controlling the strength and character of adaptive and innate immune responses. Their unique functional characteristics are induced by a transcriptional program initiated by positive selection mediated by CD1d expressed by CD4+CD8+ (double positive, DP) thymocytes. Here, using a novel Vα14 TCR transgenic strain bearing greatly expanded numbers of CD24hiCD44loNKT cells, we examined transcriptional events in four immature thymic iNKT cell subsets. A transcriptional regulatory network approach identified transcriptional changes in proximal components of the TCR signalling cascade in DP NKT cells. Subsequently, positive and negative selection, and lineage commitment, occurred at the transition from DP NKT to CD4 NKT. Thus, this study introduces previously unrecognised steps in early NKT cell development, and separates the events associated with modulation of the T cell signalling cascade prior to changes associated with positive selection and lineage commitment.
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Affiliation(s)
- Xuyen T. Dinh
- grid.1011.10000 0004 0474 1797Molecular & Cell Biology, College of Public Health, Medical & Veterinary Sciences, The Science Place, Building 142, James Cook University, Townsville, QLD 4811 Australia ,Hai Duong Medical Technical University, Hai Duong, Viet Nam
| | - Dragana Stanley
- grid.1023.00000 0001 2193 0854School of Medical and Applied Sciences, Central Queensland University, Rockhampton, QLD 4702 Australia
| | - Letitia D. Smith
- grid.1011.10000 0004 0474 1797Molecular & Cell Biology, College of Public Health, Medical & Veterinary Sciences, The Science Place, Building 142, James Cook University, Townsville, QLD 4811 Australia
| | - Morgane Moreau
- grid.1011.10000 0004 0474 1797Molecular & Cell Biology, College of Public Health, Medical & Veterinary Sciences, The Science Place, Building 142, James Cook University, Townsville, QLD 4811 Australia
| | - Stuart P. Berzins
- grid.1040.50000 0001 1091 4859School of Science, Psychology and Sport, Federation University Australia, Ballarat, VIC 3350 Australia ,grid.1008.90000 0001 2179 088XPeter Doherty Institute for Immunity and Infection, University of Melbourne, Parkville, VIC 3050 Australia
| | - Adrian Gemiarto
- grid.1011.10000 0004 0474 1797Molecular & Cell Biology, College of Public Health, Medical & Veterinary Sciences, The Science Place, Building 142, James Cook University, Townsville, QLD 4811 Australia
| | - Alan G. Baxter
- grid.1011.10000 0004 0474 1797Molecular & Cell Biology, College of Public Health, Medical & Veterinary Sciences, The Science Place, Building 142, James Cook University, Townsville, QLD 4811 Australia
| | - Margaret A. Jordan
- grid.1011.10000 0004 0474 1797Molecular & Cell Biology, College of Public Health, Medical & Veterinary Sciences, The Science Place, Building 142, James Cook University, Townsville, QLD 4811 Australia
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4
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Abstract
Unconventional T cells are a diverse and underappreciated group of relatively rare lymphocytes that are distinct from conventional CD4+ and CD8+ T cells, and that mainly recognize antigens in the absence of classical restriction through the major histocompatibility complex (MHC). These non-MHC-restricted T cells include mucosal-associated invariant T (MAIT) cells, natural killer T (NKT) cells, γδ T cells and other, often poorly defined, subsets. Depending on the physiological context, unconventional T cells may assume either protective or pathogenic roles in a range of inflammatory and autoimmune responses in the kidney. Accordingly, experimental models and clinical studies have revealed that certain unconventional T cells are potential therapeutic targets, as well as prognostic and diagnostic biomarkers. The responsiveness of human Vγ9Vδ2 T cells and MAIT cells to many microbial pathogens, for example, has implications for early diagnosis, risk stratification and targeted treatment of peritoneal dialysis-related peritonitis. The expansion of non-Vγ9Vδ2 γδ T cells during cytomegalovirus infection and their contribution to viral clearance suggest that these cells can be harnessed for immune monitoring and adoptive immunotherapy in kidney transplant recipients. In addition, populations of NKT, MAIT or γδ T cells are involved in the immunopathology of IgA nephropathy and in models of glomerulonephritis, ischaemia-reperfusion injury and kidney transplantation.
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5
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Collin R, Dugas V, Pelletier AN, Chabot-Roy G, Lesage S. Evidence of genetic epistasis in autoimmune diabetes susceptibility revealed by mouse congenic sublines. Immunogenetics 2021; 73:307-319. [PMID: 33755757 DOI: 10.1007/s00251-021-01214-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2020] [Accepted: 03/09/2021] [Indexed: 11/26/2022]
Abstract
Susceptibility to autoimmune diabetes is a complex genetic trait. Linkage analyses exploiting the NOD mouse, which spontaneously develops autoimmune diabetes, have proved to be a useful tool for the characterization of some of these traits. In a linkage analysis using 3A9 TCR transgenic mice on both B10.BR and NOD.H2k backgrounds, we previously determined that both the Idd2 and Idd13 loci were linked to the proportion of immunoregulatory CD4-CD8- double negative (DN) T cells. In addition to Idd2 and Idd13, five other loci showed weak linkage to the proportion of DN T cells. Of interest, in an interim analysis, a locus on chromosome 12 is linked to DN T cell proportion in both the spleen and the lymph nodes. To determine the impact of this locus on DN T cells, we generated two congenic sublines, which we named Chr12P and Chr12D for proximal and distal, respectively. While 3A9 TCR:insHEL NOD.H2k-Chr12D mice were protected from diabetes, 3A9 TCR:insHEL NOD.H2k-Chr12P showed an increase in diabetes incidence. Yet, the proportion of DN T cells was similar to the parental 3A9 TCR NOD.H2k strain for both of these congenic sublines. A genome-wide two dimensional LOD score analysis reveals genetic epistasis between chromosome 12 and the Idd13 locus. Altogether, this study identified further complex genetic interactions in defining the proportion of DN T cells, along with evidence of genetic epistasis within a locus on chromosome 12 influencing autoimmune susceptibility.
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Affiliation(s)
- Roxanne Collin
- Cellular Immunogenetics laboratory, Division of Immunology-Oncology, Maisonneuve-Rosemont Hospital, Montreal, Quebec, H1T 2M4, Canada
- Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montreal, Quebec, H3C 3J7, Canada
- CellCarta, 201 President Kennedy Avenue, Suite 3900, Montreal, Quebec, H2X 3Y7, Canada
| | - Véronique Dugas
- Cellular Immunogenetics laboratory, Division of Immunology-Oncology, Maisonneuve-Rosemont Hospital, Montreal, Quebec, H1T 2M4, Canada
- Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montreal, Quebec, H3C 3J7, Canada
| | | | - Geneviève Chabot-Roy
- Cellular Immunogenetics laboratory, Division of Immunology-Oncology, Maisonneuve-Rosemont Hospital, Montreal, Quebec, H1T 2M4, Canada
| | - Sylvie Lesage
- Cellular Immunogenetics laboratory, Division of Immunology-Oncology, Maisonneuve-Rosemont Hospital, Montreal, Quebec, H1T 2M4, Canada.
- Département de microbiologie, infectiologie et immunologie, Université de Montréal, Montreal, Quebec, H3C 3J7, Canada.
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6
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Leadbetter EA, Karlsson MCI. Invariant natural killer T cells balance B cell immunity. Immunol Rev 2021; 299:93-107. [PMID: 33438287 DOI: 10.1111/imr.12938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/21/2020] [Accepted: 12/04/2020] [Indexed: 12/21/2022]
Abstract
Invariant natural killer T (iNKT) cells mediate rapid immune responses which bridge the gap between innate and adaptive responses to pathogens while also providing key regulation to maintain immune homeostasis. Both types of important iNKT immune responses are mediated through interactions with innate and adaptive B cells. As such, iNKT cells sit at the decision-making fulcrum between regulating inflammatory or autoreactive B cells and supporting protective or regulatory B cell populations. iNKT cells interpret the signals in their environment to set the tone for subsequent adaptive responses, with outcomes ranging from getting licensed to maintain homeostasis as an iNKT regulatory cell (iNKTreg ) or being activated to become an iNKT follicular helper (iNKTFH ) cell supporting pathogen-specific effector B cells. Here we review iNKT and B cell cooperation across the spectrum of immune outcomes, including during allergy and autoimmune disease, tumor surveillance and immunotherapy, or pathogen defense and vaccine responses. Because of their key role as influencers, iNKT cells provide a valuable target for therapeutic interventions. Understanding the nature of the interactions between iNKT and B cells will enable the development of clinical interventions to strategically target regulatory iNKT and B cell populations or inflammatory ones, depending on the circumstance.
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Affiliation(s)
- Elizabeth A Leadbetter
- Department of Microbiology, Immunology and Molecular Genetics, UT Health San Antonio, San Antonio, TX, USA
| | - Mikael C I Karlsson
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, Stockholm, Sweden
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7
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Garner LC, Klenerman P, Provine NM. Insights Into Mucosal-Associated Invariant T Cell Biology From Studies of Invariant Natural Killer T Cells. Front Immunol 2018; 9:1478. [PMID: 30013556 PMCID: PMC6036249 DOI: 10.3389/fimmu.2018.01478] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 06/14/2018] [Indexed: 12/24/2022] Open
Abstract
Mucosal-associated invariant T (MAIT) cells and invariant natural killer T (iNKT) cells are innate-like T cells that function at the interface between innate and adaptive immunity. They express semi-invariant T cell receptors (TCRs) and recognize unconventional non-peptide ligands bound to the MHC Class I-like molecules MR1 and CD1d, respectively. MAIT cells and iNKT cells exhibit an effector-memory phenotype and are enriched within the liver and at mucosal sites. In humans, MAIT cell frequencies dwarf those of iNKT cells, while in laboratory mouse strains the opposite is true. Upon activation via TCR- or cytokine-dependent pathways, MAIT cells and iNKT cells rapidly produce cytokines and show direct cytotoxic activity. Consequently, they are essential for effective immunity, and alterations in their frequency and function are associated with numerous infectious, inflammatory, and malignant diseases. Due to their abundance in mice and the earlier development of reagents, iNKT cells have been more extensively studied than MAIT cells. This has led to the routine use of iNKT cells as a reference population for the study of MAIT cells, and such an approach has proven very fruitful. However, MAIT cells and iNKT cells show important phenotypic, functional, and developmental differences that are often overlooked. With the recent availability of new tools, most importantly MR1 tetramers, it is now possible to directly study MAIT cells to understand their biology. Therefore, it is timely to compare the phenotype, development, and function of MAIT cells and iNKT cells. In this review, we highlight key areas where MAIT cells show similarity or difference to iNKT cells. In addition, we discuss important avenues for future research within the MAIT cell field, especially where comparison to iNKT cells has proven less informative.
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Affiliation(s)
- Lucy C. Garner
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Paul Klenerman
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
- Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, United Kingdom
| | - Nicholas M. Provine
- Translational Gastroenterology Unit, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
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8
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DeVault VL, Malagic M, Mei L, Dienz O, Lilley GWJ, Benoit P, Mistri SK, Musial SC, Ather JL, Poynter ME, Boyson JE. Regulation of invariant NKT cell development and function by a 0.14 Mbp locus on chromosome 1: a possible role for Fcgr3. Genes Immun 2018; 20:261-272. [PMID: 29880961 PMCID: PMC6286708 DOI: 10.1038/s41435-018-0031-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 04/04/2018] [Accepted: 04/09/2018] [Indexed: 12/28/2022]
Abstract
Invariant NKT (iNKT) cells are tissue-resident innate-like T cells critical to the host immune response. We previously identified a 6.6 Mbp region on chromosome 1 as a major regulator of iNKT cell number and function in C57BL/6 and 129X1/SvJ mice. Here, we fine-mapped this locus by assessing the iNKT cell response to alpha-galactosylceramide (αGalCer) in a series of B6.129 congenic lines. This analysis revealed the presence of at least two genetic elements that regulate iNKT cell cytokine production in response to αGalCer. While one of these genetic elements mapped to the B6.129c6 interval containing Slam genes, the dominant regulator in this region mapped to the 0.14 Mbp B6.129c3 interval. In addition, we found that numbers of thymic iNKT cells and DP thymocytes were significantly lower in B6.129c3 mice, indicating that this interval also regulates iNKT cell development. Candidate gene analysis revealed a 5-fold increase in Fcgr3 expression in B6.129c3 iNKT cells, and we observed increased expression of FcγR3 protein on B6.129c3 iNKT cells, NK cells, and neutrophils. These data identify the B6.129c3 interval as a novel locus regulating the response of iNKT cells to glycosphingolipid, revealing a link between this phenotype and a polymorphism that regulates Fcgr3 expression.
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Affiliation(s)
- Victoria L DeVault
- Department of Surgery, University of Vermont Larner College of Medicine, Burlington, VT, USA.,Cellular, Molecular, and Biomedical Sciences Program, University of Vermont, Burlington, VT, USA
| | - Murisa Malagic
- Department of Surgery, University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Linda Mei
- Department of Surgery, University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Oliver Dienz
- Department of Surgery, University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Graham W J Lilley
- Department of Surgery, University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Patrick Benoit
- Department of Surgery, University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Somen K Mistri
- Department of Surgery, University of Vermont Larner College of Medicine, Burlington, VT, USA.,Cellular, Molecular, and Biomedical Sciences Program, University of Vermont, Burlington, VT, USA
| | - Shawn C Musial
- Department of Surgery, University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Jennifer L Ather
- Division of Pulmonary Disease and Critical Care, Department of Medicine, Vermont Lung Center, University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Matthew E Poynter
- Cellular, Molecular, and Biomedical Sciences Program, University of Vermont, Burlington, VT, USA.,Division of Pulmonary Disease and Critical Care, Department of Medicine, Vermont Lung Center, University of Vermont Larner College of Medicine, Burlington, VT, USA
| | - Jonathan E Boyson
- Department of Surgery, University of Vermont Larner College of Medicine, Burlington, VT, USA. .,Cellular, Molecular, and Biomedical Sciences Program, University of Vermont, Burlington, VT, USA.
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9
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Schrumpf E, Jiang X, Zeissig S, Pollheimer MJ, Anmarkrud JA, Tan C, Exley MA, Karlsen TH, Blumberg RS, Melum E. The role of natural killer T cells in a mouse model with spontaneous bile duct inflammation. Physiol Rep 2017; 5:5/4/e13117. [PMID: 28219981 PMCID: PMC5328767 DOI: 10.14814/phy2.13117] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/01/2016] [Accepted: 12/13/2016] [Indexed: 12/15/2022] Open
Abstract
Natural killer T (NKT) cells are activated by lipid antigens presented by CD1d molecules and represent a major lymphocyte subset of the liver. NODc3c4 mice spontaneously develop biliary inflammation in extra- and intrahepatic bile ducts. We demonstrated by flow cytometry that invariant NKT (iNKT) cells were more abundant in the thymus, spleen, and liver of NODc3c4 mice compared to NOD mice. iNKT cells in NODc3c4 mice displayed an activated phenotype. Further, NOD and NODCd1d-/- mice were irradiated and injected with NODc3c4 bone marrow, and injection of NODc3c4 bone marrow resulted in biliary infiltrates independently of CD1d expression in recipient mice. Activation or blocking of NKT cells with α-galactosylceramide or anti-CD1d antibody injections did not affect the biliary phenotype of NODc3c4 mice. NODc3c4.Cd1d-/- mice were generated by crossing NODCd1d-/- mice onto a NODc3c4 background. NODc3c4.Cd1d-/- and NODc3c4 mice developed the same extent of biliary disease. This study demonstrates that iNKT cells are more abundant and activated in the NODc3c4 model. The portal inflammation of NODc3c4 mice can be transferred to irradiated recipients, which suggests an immune-driven disease. Our findings imply that NKT cells can potentially participate in the biliary inflammation, but are not the primary drivers of disease in NODc3c4 mice.
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Affiliation(s)
- Elisabeth Schrumpf
- Norwegian PSC Research Center, Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital, Rikshospitalet, Oslo, Norway.,K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Research Institute of Internal Medicine, Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Xiaojun Jiang
- Norwegian PSC Research Center, Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital, Rikshospitalet, Oslo, Norway.,K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway
| | - Sebastian Zeissig
- Department of Medicine 1, University Medical Center Dresden Technical University Dresden, Dresden, Germany.,Center for Regenerative Therapies (CRTD), Technical University Dresden, Dresden, Germany
| | - Marion J Pollheimer
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Research Unit for Experimental and Molecular Hepatology, Graz, Austria.,Institute of Pathology, Medical University of Graz, Graz, Austria
| | - Jarl Andreas Anmarkrud
- Norwegian PSC Research Center, Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Corey Tan
- Norwegian PSC Research Center, Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital, Rikshospitalet, Oslo, Norway.,K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Research Institute of Internal Medicine, Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Mark A Exley
- Manchester Collaborative Centre for Inflammation Research (MCCIR), Faculty of Medical & Human Sciences, University of Manchester, Manchester, United Kingdom.,Division of Gastroenterology, Hepatology and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Tom H Karlsen
- Norwegian PSC Research Center, Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital, Rikshospitalet, Oslo, Norway.,K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Research Institute of Internal Medicine, Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Section of Gastroenterology, Division of Surgery, Inflammatory Diseases and Transplantation, Oslo University Hospital, Rikshospitalet, Oslo, Norway
| | - Richard S Blumberg
- Division of Gastroenterology, Hepatology and Endoscopy, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Espen Melum
- Norwegian PSC Research Center, Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital, Rikshospitalet, Oslo, Norway .,K.G. Jebsen Inflammation Research Centre, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Research Institute of Internal Medicine, Division of Surgery, Inflammatory Diseases and Transplantation Oslo University Hospital, Rikshospitalet, Oslo, Norway.,Section of Gastroenterology, Division of Surgery, Inflammatory Diseases and Transplantation, Oslo University Hospital, Rikshospitalet, Oslo, Norway
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10
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Beristain-Covarrubias N, Canche-Pool EB, Ramirez-Velazquez C, Barragan-Galvez JC, Gomez-Diaz RA, Ortiz-Navarrete V. Class I-Restricted T Cell-Associated Molecule Is a Marker for IFN-γ-Producing iNKT Cells in Healthy Subjects and Patients with Type 1 Diabetes. J Interferon Cytokine Res 2016; 37:39-49. [PMID: 27835062 DOI: 10.1089/jir.2016.0006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Class I-restricted T cell-associated molecule (CRTAM) is an activation marker expressed on the cell surface of activated invariant natural killer T (iNKT) cells, CD8+ T cells, and a small subset of CD4+ T cells. CRTAM has also been associated with a proinflammatory profile in murine CD4+ T cells. However, CRTAM has not been thoroughly explored in human cells. This work focused on evaluating CRTAM expression in human iNKT lymphocytes after activation with α-galactosylceramide, its widely used specific glycolipid antigen. We also analyzed the involvement of costimulatory molecules in CRTAM expression and whether CRTAM expression is associated with a specific effector cytokine profile. We found that the signal produced by invariant T cell receptor (iTCR) engagement with α-galactosylceramide is sufficient to trigger CRTAM expression on human iNKT cells after 18 h of stimulation. Moreover, we observed a clear association between CRTAM expression and IFN-γ production in iNKT cells from healthy subjects and patients with type 1 diabetes. However, blocking the engagement of costimulatory molecules, such as CD40, CD80, and CD86, did not modify CRTAM expression. These results indicate that CRTAM may also play a role in triggering the production of IFN-γ in human iNKT cells and that CRTAM could be used as a marker to identify these inflammatory cells.
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Affiliation(s)
| | - Elsy B Canche-Pool
- 2 Laboratory of Zoonoses, Dr. Hideyo Noguchi Center for Regional Investigations, Autonomous University of Yucatan , Merida, Mexico
| | - Carlos Ramirez-Velazquez
- 3 Department of Allergy, Dr. Fernando Quiroz Gutierrez General Hospital , ISSSTE, Mexico City, Mexico
| | - Juan Carlos Barragan-Galvez
- 1 Department of Molecular Biomedicine, Center for Research and Advanced Studies (CINVESTAV) , Mexico City, Mexico
| | - Rita A Gomez-Diaz
- 4 Research Unit on Clinical Epidemiology (UMAE), Specialty Hospital, National Medical Center , IMSS, Mexico City, Mexico
| | - Vianney Ortiz-Navarrete
- 1 Department of Molecular Biomedicine, Center for Research and Advanced Studies (CINVESTAV) , Mexico City, Mexico
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11
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Hamilton-Williams EE, Bergot AS, Reeves PLS, Steptoe RJ. Maintenance of peripheral tolerance to islet antigens. J Autoimmun 2016; 72:118-25. [PMID: 27255733 DOI: 10.1016/j.jaut.2016.05.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Revised: 05/19/2016] [Accepted: 05/23/2016] [Indexed: 01/04/2023]
Abstract
Reestablishment of immune tolerance to the insulin-producing beta cells is the desired goal for type 1 diabetes (T1D) treatment and prevention. Immune tolerance to multiple islet antigens is defective in individuals with T1D, but the mechanisms involved are multifaceted and may involve loss of thymic and peripheral tolerance. In this review we discuss our current understanding of the varied mechanisms by which peripheral tolerance to islet antigens is maintained in healthy individuals where genetic protection from T1D is present and how this fails in those with genetic susceptibility to disease. Novel findings in regards to expression of neo-islet antigens, non-classical regulatory cell subsets and the impact of specific genetic variants on tolerance induction are discussed.
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Affiliation(s)
- Emma E Hamilton-Williams
- The University of Queensland Diamantina Institute, University of Queensland, Translational Research Institute, Brisbane, QLD, Australia.
| | - Anne-Sophie Bergot
- The University of Queensland Diamantina Institute, University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Peta L S Reeves
- The University of Queensland Diamantina Institute, University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
| | - Raymond J Steptoe
- The University of Queensland Diamantina Institute, University of Queensland, Translational Research Institute, Brisbane, QLD, Australia
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12
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Tard C, Rouxel O, Lehuen A. Regulatory role of natural killer T cells in diabetes. Biomed J 2016; 38:484-95. [PMID: 27013448 PMCID: PMC6138260 DOI: 10.1016/j.bj.2015.04.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 04/24/2015] [Indexed: 01/02/2023] Open
Abstract
Type 1 and type 2 diabetes are growing public health problems. Despite having different pathophysiologies, both diseases are associated with defects in immune regulation. Invariant natural killer T (iNKT) cells are innate-like T cells that recognize glycolipids presented by CD1d. These cells not only play a key role in the defense against pathogens, but also exert potent immunoregulatory functions. The regulatory role of iNKT cells in the prevention of type 1 diabetes has been demonstrated in murine models and analyzed in diabetic patients. The decreased frequency of iNKT cells in non-obese diabetic mice initially suggested the regulatory role of this cell subset. Increasing the frequency or the activation of iNKT cells with agonists protects non-obese diabetic mice from the development of diabetes. Several mechanisms mediate iNKT regulatory functions. They can rapidly produce immunoregulatory cytokines, interleukin (IL)-4 and IL-10. They induce tolerogenic dendritic cells, thereby inducing the anergy of autoreactive anti-islet T cells and increasing the frequency of T regulatory cells (Treg cells). Synthetic agonists are able to activate iNKT cells and represent potential therapeutic treatment in order to prevent type 1 diabetes. Growing evidence points to a role of immune system in glucose intolerance and type 2 diabetes. iNKT cells are resident cells of adipose tissue and their local and systemic frequencies are reduced in obese patients, suggesting their involvement in local and systemic inflammation during obesity. With the discovery of potential continuity between type 1 and type 2 diabetes in some patients, the role of iNKT cells in these diseases deserves further investigation.
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Affiliation(s)
- Celine Tard
- Laboratory "Immunology of Diabetes", U1016 INSERM-Institut Cochin, Paris, France; CNRS UMR8104, Paris, France; Laboratoire d'Excellence INFLAMEX, Université Paris Descartes, Sorbonne Paris Cité, Paris, France; DHU Authors, Hôpital Cochin, 75014, Paris, France
| | - Ophelie Rouxel
- Laboratory "Immunology of Diabetes", U1016 INSERM-Institut Cochin, Paris, France; CNRS UMR8104, Paris, France; Laboratoire d'Excellence INFLAMEX, Université Paris Descartes, Sorbonne Paris Cité, Paris, France; DHU Authors, Hôpital Cochin, 75014, Paris, France
| | - Agnes Lehuen
- Laboratory "Immunology of Diabetes", U1016 INSERM-Institut Cochin, Paris, France; CNRS UMR8104, Paris, France; Laboratoire d'Excellence INFLAMEX, Université Paris Descartes, Sorbonne Paris Cité, Paris, France; DHU Authors, Hôpital Cochin, 75014, Paris, France.
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Beristain‐Covarrubias N, Canche‐Pool E, Gomez‐Diaz R, Sanchez‐Torres LE, Ortiz‐Navarrete V. Reduced iNKT cells numbers in type 1 diabetes patients and their first-degree relatives. Immun Inflamm Dis 2015; 3:411-9. [PMID: 26734463 PMCID: PMC4693717 DOI: 10.1002/iid3.79] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 07/07/2015] [Accepted: 08/04/2015] [Indexed: 01/23/2023] Open
Abstract
Type 1 diabetes (T1D) is an autoimmune disease that is characterized by the specific destruction of insulin-producing pancreatic β cells. Invariant natural killer T (iNKT) cells have been associated with development of T1D. Class I MHC-restricted T cell-associated molecule (CRTAM) is expressed on activated iNKT, CD8(+), and CD4(+) T cells, and it is associated with the pro-inflammatory profiles of these cells. Crtam gene expression in CD3(+) lymphocytes from non-obese diabetic (NOD) mice is associated with T1D onset. However, expression of CRTAM on T cells from patients with T1D has not yet been evaluated. We compared iNKT cell (CD3(+)Vα24(+)Vβ11(+)) numbers and CRTAM expression in a Mexican population with recent-onset T1D and their first-degree relatives with control families. Remarkably, we found lower iNKT cell numbers in T1D families, and we identified two iNKT cell populations in some of the families. One iNKT cell population expressed high iTCR levels (iNKT(hi)), whereas another expressed low levels (iNKT(lo)) and also expressed CRTAM. These findings support a probable genetic determinant of iNKT cell numbers and a possible role for these cells in T1D development. This study also suggests that CRTAM identifies recently activated iNKT lymphocytes.
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Affiliation(s)
| | - Elsy Canche‐Pool
- Immunology LaboratoryCenter for Regional Investigations “Dr. Hideyo Noguchi”MéridaMexico
- Department of Immunology, National School of Biological ScienceNational Polytechnic InstituteMexico CityMexico
| | - Rita Gomez‐Diaz
- Research Unit on Clinical Epidemiology (UMAE), Specialty Hospital, National Medical CenterMexican Social Security InstituteMexico CityMexico
| | - Luvia E. Sanchez‐Torres
- Department of Immunology, National School of Biological ScienceNational Polytechnic InstituteMexico CityMexico
| | - Vianney Ortiz‐Navarrete
- Department of Molecular BiomedicineCenter for Research and Advanced Studies (CINVESTAV)Mexico CityMexico
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Abstract
Type 1 and type 2 diabetes are growing public health problems. Despite having different pathophysiologies, both diseases are associated with defects in immune regulation. Invariant natural killer T (iNKT) cells are innate-like T cells that recognize glycolipids presented by CD1d. These cells not only play a key role in the defense against pathogens, but also exert potent immunoregulatory functions. The regulatory role of iNKT cells in the prevention of type 1 diabetes has been demonstrated in murine models and analyzed in diabetic patients. The decreased frequency of iNKT cells in non-obese diabetic mice initially suggested the regulatory role of this cell subset. Increasing the frequency or the activation of iNKT cells with agonists protects non-obese diabetic mice from the development of diabetes. Several mechanisms mediate iNKT regulatory functions. They can rapidly produce immunoregulatory cytokines, interleukin (IL)-4 and IL-10. They induce tolerogenic dendritic cells, thereby inducing the anergy of autoreactive anti-islet T cells and increasing the frequency of T regulatory cells (Treg cells). Synthetic agonists are able to activate iNKT cells and represent potential therapeutic treatment in order to prevent type 1 diabetes. Growing evidence points to a role of immune system in glucose intolerance and type 2 diabetes. iNKT cells are resident cells of adipose tissue and their local and systemic frequencies are reduced in obese patients, suggesting their involvement in local and systemic inflammation during obesity. With the discovery of potential continuity between type 1 and type 2 diabetes in some patients, the role of iNKT cells in these diseases deserves further investigation.
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Affiliation(s)
| | | | - Agnes Lehuen
- Laboratory "Immunology of Diabetes" U1016 INSERM Institut Cochin; CNRS UMR8104; Laboratoire d'Excellence INFLAMEX, Université Paris Descartes, Sorbonne Paris Cité; DHU Authors, Hôpital Cochin, 75014, Paris, France
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15
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The role of CD1d-restricted NKT cells in the clearance of Pseudomonas aeruginosa from the lung is dependent on the host genetic background. Infect Immun 2015; 83:2557-65. [PMID: 25870224 DOI: 10.1128/iai.00015-15] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2015] [Accepted: 03/27/2015] [Indexed: 11/20/2022] Open
Abstract
Pseudomonas aeruginosa is an important human opportunistic pathogen, accounting for a significant fraction of hospital-acquired lung infections. CD1d-restricted NKT cells comprise an unusual innate-like T cell subset that plays important roles in both bacterial and viral infections. Previous reports have differed in their conclusions regarding the role of NKT cells in clearance of P. aeruginosa from the lung. Since there is significant strain-dependent variation in NKT cell number and function among different inbred strains of mice, we investigated whether the role of NKT cells was dependent on the host genetic background. We found that NKT cells did indeed play a critical role in the clearance of P. aeruginosa from the lungs of BALB/c mice but that they played no discernible role in clearance from the lungs of C57BL/6 mice. We found that the strain-dependent role of NKT cells was associated with significant strain-dependent differences in cytokine production by lung NKT cells and that impaired clearance of P. aeruginosa in BALB/c CD1d(-/-) mice was associated with an increase in neutrophil influx to the lung and increased levels of proinflammatory cytokines and chemokines after infection. Finally, we found that the role of alveolar macrophages was also dependent on the genetic background. These data provide further support for a model in which the unusually high level of variability in NKT cell number and function among different genetic backgrounds may be an important contributor to infectious-disease susceptibility and pathology.
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Tsaih SW, Presa M, Khaja S, Ciecko AE, Serreze DV, Chen YG. A locus on mouse chromosome 13 inversely regulates CD1d expression and the development of invariant natural killer T-cells. Genes Immun 2015; 16:221-30. [PMID: 25654212 PMCID: PMC4409484 DOI: 10.1038/gene.2014.81] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Revised: 12/17/2014] [Accepted: 12/18/2014] [Indexed: 12/12/2022]
Abstract
Invariant natural killer T (iNKT)-cell development is controlled by many polymorphic genes present in commonly used mouse inbred strains. Development of type 1 diabetes (T1D) in NOD mice partly results from their production of fewer iNKT-cells compared to non-autoimmune prone control strains including ICR. We previously identified several iNKT-cell quantitative trait genetic loci co-localized with known mouse and human T1D regions in a (NOD × ICR)F2 cross. To further dissect the mechanisms underlying the impaired iNKT-cell compartment in NOD mice, we carried out a series of bone marrow transplantation as well as additional genetic mapping studies. We found that impaired iNKT-cell development in NOD mice was mainly due to the inability of their double-positive (DP) thymocytes to efficiently select this T-cell population. Interestingly, we observed higher levels of CD1d expression by NOD than ICR DP thymocytes. The genetic control of the inverse relationship between the CD1d expression level on DP thymocytes and the frequency of thymic iNKT-cells was further mapped to a region on Chromosome 13 between 60.12 Mb and 70.59 Mb. The NOD allele was found to promote CD1d expression and suppress iNKT-cell development. Our results indicate that genetically controlled physiological variation of CD1d expression levels modulates iNKT-cell development.
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Affiliation(s)
- S-W Tsaih
- Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - M Presa
- The Jackson Laboratory, Bar Harbor, ME, USA
| | - S Khaja
- 1] Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, USA [2] Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI, USA
| | - A E Ciecko
- 1] Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, USA [2] Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI, USA
| | | | - Y-G Chen
- 1] Human and Molecular Genetics Center, Medical College of Wisconsin, Milwaukee, WI, USA [2] Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI, USA
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Adjuvant effects of therapeutic glycolipids administered to a cohort of NKT cell-diverse pigs. Vet Immunol Immunopathol 2014; 162:1-13. [PMID: 25441499 DOI: 10.1016/j.vetimm.2014.09.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 09/17/2014] [Accepted: 09/25/2014] [Indexed: 02/08/2023]
Abstract
CD1d-restricted natural killer T (NKT) cells are a unique lymphocyte population that makes important contributions to host defense against numerous microbial pathogens. The powerful immunomodulatory effects of these cells can be exploited in mice by cognate antigens for multiple therapeutic purposes, including for protection from infectious diseases and as adjuvants to improve vaccines against microbial organisms. These applications have potential to treat and prevent infectious diseases in livestock species that express NKT cells, including pigs. In this study, immune tissues from commercial swine of mixed genetic background were compared for NKT cell frequency, cytokine secretion and subset ratios. Pigs were also injected with the model antigen hen-egg lysozyme (HEL) in conjunction with one of three glycosphingolipids, alpha-galactosylceramide (αGC), OCH and C-glycoside that selectively activate NKT cells, to assess the adjuvant potential of each. There was significant variation between individual pigs for all NKT cell parameters measured. The NKT cell agonists elicited HEL-specific immune responses of different quality, but only αGC increased the systemic concentration of NKT cells. Peripheral blood NKT cell frequency measured prior to treatment was a poor predictor of how individual animals responded to NKT cell therapy. However, our results show that although NKT cells vary considerably between pigs, there exists considerable potential to harness these cells to protect swine from infectious diseases.
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18
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Idd13 is involved in determining immunoregulatory DN T-cell number in NOD mice. Genes Immun 2014; 15:82-7. [PMID: 24335706 DOI: 10.1038/gene.2013.65] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Revised: 11/08/2013] [Accepted: 11/12/2013] [Indexed: 12/20/2022]
Abstract
Immunoregulatory T cells have been identified as key modulators of peripheral tolerance and participate in preventing autoimmune diseases. CD4(-)CD8(-) (double negative, DN) T cells compose one of these immunoregulatory T-cell subsets, where the injection of DN T cells confers protection from autoimmune diabetes progression. Interestingly, genetic loci defining the function and number of CD4(+)CD25(+)Foxp3(+) regulatory T cells (Tregs) coincide with at least some autoimmune disease susceptibility loci. Herein, we investigate the impact of major insulin-dependent diabetes (Idd) loci in defining the number of DN T cells. We demonstrate that although Idd3, Idd5 and Idd9 loci do not regulate DN T-cell number, NOD mice congenic for diabetes resistance alleles at the Idd13 locus show a partial restoration in DN T-cell number. Moreover, competitive and non-competitive bone marrow chimera experiments reveal that DN T-cell number is defined by a bone marrow-intrinsic, but DN T-cell-extrinsic, factor. This suggests that non-autonomous candidate genes define DN T-cell number in secondary lymphoid organs. Together, our results show that the regulation of DN T-cell number in NOD mice is at least partially conferred by alleles at the Idd13 locus.
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Kadri N, Blomqvist M, Cardell SL. Type II natural killer T cells: a new target for immunomodulation? Expert Rev Clin Immunol 2014; 4:615-27. [DOI: 10.1586/1744666x.4.5.615] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Borg ZD, Benoit PJ, Lilley GWJ, Aktan I, Chant A, DeVault VL, Rincon M, Boyson JE. Polymorphisms in the CD1d promoter that regulate CD1d gene expression are associated with impaired NKT cell development. THE JOURNAL OF IMMUNOLOGY 2013; 192:189-99. [PMID: 24307737 DOI: 10.4049/jimmunol.1301451] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
CD1d-restricted NKT cells comprise an innate-like T cell population that exerts significant influence over early events in the developing immune response. The frequency of NKT cells is highly variable in humans and in mice, but the basis for this variability remains unclear. In this study, we report a striking deficiency of type I NKT cells in the wild-derived inbred strains PWD/PhJ, SPRET/EiJ, and CAST/EiJ. Investigation of the underlying basis for the lack of type I NKT cells revealed that one strain, PWD/PhJ, exhibited a significant impairment in thymocyte and splenocyte CD1d gene and protein expression. Accordingly, both thymocytes and bone marrow-derived dendritic cells from PWD mice exhibited a significant impairment in the ability to present α-galactosylceramide to NKT cells. The impaired PWD CD1d gene expression was due to impaired CD1d promoter activity. Fine-mapping of the promoter activity revealed that two single nucleotide substitutions at positions -331 and -164 in the proximal promoter were each sufficient to account for the diminished PWD CD1d promoter activity. Examination of the strain distribution pattern of these polymorphisms revealed that, of 19 strains analyzed, only PWD and PWK mice possessed both CD1d promoter polymorphisms. A subsequent examination of the PWK strain revealed that it also exhibited impaired thymocyte CD1d expression and very low numbers of NKT cells. Taken together, these results provide new insight into the control of CD1d gene expression, and they have implications for the evolution of CD1d and type I NKT cells.
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Affiliation(s)
- Zachary D Borg
- Department of Surgery, University of Vermont College of Medicine, Burlington, VT 05405
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22
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Yang JQ, Kim PJ, Halder RC, Singh RR. Intrinsic hyporesponsiveness of invariant natural killer T cells precedes the onset of lupus. Clin Exp Immunol 2013; 173:18-27. [PMID: 23607366 DOI: 10.1111/cei.12079] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/18/2013] [Indexed: 01/26/2023] Open
Abstract
Patients with systemic lupus erythematosus (SLE) display reduced numbers and functions of invariant natural killer T (iNK T) cells, which are restored upon treatment with corticosteroids and rituximab. It is unclear whether the iNK T cell insufficiency is a consequence of disease or is a primary abnormality that precedes the onset of disease. To address this, we analysed iNK T cell function at different stages of disease development using the genetically lupus-susceptible NZB × NZW F1 (BWF(1)) model. We found that iNK T cell in-vivo cytokine responses to an iNK T cell ligand α-galactosylceramide (α-GalCer) were lower in BWF(1) mice than in non-autoimmune BALB/c and major histocompatibility complex (MHC)-matched NZB × N/B10.PL F1 mice, although iNK T cell numbers in the periphery were unchanged in BWF(1) mice compared to control mice. Such iNK T cell hyporesponsiveness in BWF(1) mice was detected at a young age long before the animals exhibited any sign of autoimmunity. In-vivo activation of iNK T cells is known to transactivate other immune cells. Such transactivated T and B cell activation markers and/or cytokine responses were also lower in BWF(1) mice than in BALB/c controls. Finally, we show that iNK T cell responses were markedly deficient in the NZB parent but not in NZW parent of BWF(1) mice, suggesting that BWF(1) might inherit the iNK T cell defect from NZB mice. Thus, iNK T cells are functionally insufficient in lupus-prone BWF(1) mice. Such iNK T cell insufficiency precedes the onset of disease and may play a pathogenic role during early stages of disease development in SLE.
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Affiliation(s)
- J-Q Yang
- Autoimmunity and Tolerance Laboratory, Division of Rheumatology, Department of Medicine, David Geffen School of Medicine at University of California Los Angeles, USA
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Genetic control of murine invariant natural killer T cells maps to multiple type 1 diabetes regions. Genes Immun 2013; 14:380-6. [PMID: 23719031 PMCID: PMC3766462 DOI: 10.1038/gene.2013.32] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 04/25/2013] [Accepted: 04/29/2013] [Indexed: 02/06/2023]
Abstract
Reduced frequency of invariant natural killer T (iNKT)-cells has been indicated as a contributing factor to type 1 diabetes (T1D) development in NOD mice. To further understand the genetic basis of the defect, we generated (NOD X ICR)F2 mice to map genes that control iNKT-cell development. We determined frequencies of thymic and splenic iNKT-cells as well as the ratio of CD4-positive and -negative subsets in the spleens of 209 F2 males. Quantitative trait loci (QTL) analysis revealed 5 loci that exceed the significant threshold for the frequency of thymic and/or splenic iNKT-cells on Chromosomes (Chr) 1, 5, 6, 12, and 17. Three significant loci on Chr 1, 4, and 5 were found for the ratio of CD4-positive and -negative splenic iNKT-cells. Comparisons to previously known mouse T1D susceptibility (Idd) loci revealed two significant QTL peak locations respectively mapped to Idd regions on Chr 4 and 6. The peak marker location of the significant Chr 12 iNKT QTL maps to within 0.5Mb of a syntenic human T1D locus. Collectively, our results reveal several novel loci controlling iNKT-cell development and provide additional information for future T1D genetic studies.
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Pelletier AN, Lesage S. The Idd13 congenic interval defines the number of merocytic dendritic cells, a novel trait associated with autoimmune diabetes susceptibility. J Autoimmun 2013; 43:70-7. [PMID: 23623717 DOI: 10.1016/j.jaut.2013.04.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Accepted: 04/01/2013] [Indexed: 10/26/2022]
Abstract
When antigens derived from apoptotic cells are presented by conventional dendritic cells (cDC), T cell tolerance is induced. Surprisingly, the presentation of apoptotic cell antigens by an unconventional DC subset, termed merocytic dendritic cells (mcDC), can reverse T cell anergy. The potency of mcDC at breaking T cell tolerance has been demonstrated in the context of tumors and autoimmunity, suggesting that modulating the number of mcDC in vivo may be of clinical interest. To identify the genetic determinants that define the number of mcDC, we performed a linkage analysis between NOD and C57BL/6 mouse strains, where autoimmune-prone NOD mice show an increased proportion of mcDC relative to the non-autoimmune-prone C57BL/6 mice. We identified a locus on chromosome 2 significantly linked to both the proportion and the absolute number of mcDC in the spleen. Interestingly, the dominant interval on chromosome 2 overlaps with a locus previously associated with diabetes protection, namely Idd13. Using NOD.Idd13 congenic mice, we validate the impact of the Idd13 congenic interval in defining the proportion and number of mcDC in the spleen. These results show that the decreased number of mcDC is conferred by C57BL/6 alleles at the Idd13 locus, which is linked to diabetes resistance.
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Affiliation(s)
- Adam-Nicolas Pelletier
- Department of Immunology-Oncology, Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada.
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25
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Ravishankar B, McGaha TL. O death where is thy sting? Immunologic tolerance to apoptotic self. Cell Mol Life Sci 2013; 70:3571-89. [PMID: 23377225 DOI: 10.1007/s00018-013-1261-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2012] [Revised: 12/14/2012] [Accepted: 01/03/2013] [Indexed: 12/22/2022]
Abstract
In higher organisms, innate scavenging cells maintain physiologic homeostasis by removal of the billions of apoptotic cells generated on a daily basis. Apoptotic cell removal requires efficient recognition and uptake by professional and non-professional phagocytic cells, which are governed by an array of soluble and apoptotic cell-integral signals resulting in immunologically silent clearance. While apoptosis is associated with profound suppression of adaptive and innate inflammatory immunity, we have only begun to scratch the surface in understanding how immunologic tolerance to apoptotic self manifest at either the molecular or cellular level. In the last 10 years, data has emerged implicating professional phagocytes, most notably stromal macrophages and CD8α(+)CD103(+) dendritic cells, as critical in initiation of the regulatory cascade that will ultimately lead to long-term whole-animal immune tolerance. Importantly, recent work by our lab and others has shown that alterations in apoptotic cell perception by the innate immune system either by removal of critical phagocytic sentinels in secondary lymphoid organs or blockage of immunosuppressive pathways leads to pronounced inflammation with a breakdown of tolerance towards self. This challenges the paradigm that apoptotic cells are inherently immunosuppressive, suggesting that apoptotic cell tolerance is a "context-dependent" event.
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Affiliation(s)
- Buvana Ravishankar
- Cancer Immunology, Inflammation, and Tolerance Program, GRU Cancer Center, Georgia Regents University, Building CN4143, 1120 15th Street, Augusta, GA, 30904, USA
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26
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Chen YG, Tsaih SW, Serreze DV. Genetic control of murine invariant natural killer T-cell development dynamically differs dependent on the examined tissue type. Genes Immun 2011; 13:164-74. [PMID: 21938016 DOI: 10.1038/gene.2011.68] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Previous studies using gene-targeted mutant mice revealed several molecules important for the development or function of invariant natural killer T (iNKT) cells. However, these gene knockout mice represent cases that are rare in humans. Thus, it remains unclear how naturally occurring allelic variants of these genes or others regulate the numerical and functional diversity of iNKT cells in both mice and humans. Studies in humans are mostly limited to iNKT cells in peripheral blood (PB). It is not known if the relative distribution of iNKT cells between PB and other lymphoid organs is correlated or under common genetic control. To initially address these questions, we analyzed iNKT cells in the spleen, thymus and PB of 38 inbred mouse strains. Percentages of iNKT cells in these three anatomical sites varied significantly in a strain-dependent manner. The correlation between PB and spleen was moderate, and none was observed between PB and thymus. Similarly, proportions of the CD4-expressing subset of iNKT cells differed significantly among inbred strains. The percentages of CD4-positive iNKT cells displayed a strong correlation between PB and spleen, although it remained poor between PB and thymus. Genome-wide association studies across strains identified only partially overlapping loci associated with variability of iNKT cell frequencies within and between differing anatomical sites.
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Affiliation(s)
- Y-G Chen
- The Jackson Laboratory, Bar Harbor, ME, USA
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27
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Early activated Th-1 type and dominantly diverse natural killer T (CD3+CD161+Vα24−) cells in bone marrow among visceral leishmaniasis patients. Int J Parasitol 2011; 41:1069-77. [DOI: 10.1016/j.ijpara.2011.05.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 05/26/2011] [Accepted: 05/30/2011] [Indexed: 11/21/2022]
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28
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Hu T, Gimferrer I, Alberola-Ila J. Control of early stages in invariant natural killer T-cell development. Immunology 2011; 134:1-7. [PMID: 21718314 DOI: 10.1111/j.1365-2567.2011.03463.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Natural killer T (NKT) cells develop in the thymus from the same precursors as conventional CD4(+) and CD8(+) αβ T cells, CD4(+) CD8(+) double-positive cells. In contrast to conventional αβT cells, which are selected by MHC-peptide complexes presented by thymic epithelial cells, invariant NKT cells are selected by lipid antigens presented by the non-polymorphic, MHC I-like molecule CD1d, present on the surface of other double-positive thymocytes, and require additional signals from the signalling lymphocytic-activation molecule (SLAM) family of receptors. In this review, we provide a discussion of recent findings that have modified our understanding of the NKT cell developmental programme, with an emphasis on events that affect the early stages of this process. This includes factors that control double-positive thymocyte lifespan, and therefore the ability to generate the canonical Vα rearrangements that characterize this lineage, as well as the signal transduction pathways engaged downstream of the T-cell receptor and SLAM molecules.
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Affiliation(s)
- Taishan Hu
- Immunobiology and Cancer Research Program, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA
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29
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Berzins SP, Smyth MJ, Baxter AG. Presumed guilty: natural killer T cell defects and human disease. Nat Rev Immunol 2011; 11:131-42. [PMID: 21267014 DOI: 10.1038/nri2904] [Citation(s) in RCA: 277] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Natural killer T (NKT) cells are important regulatory lymphocytes that have been shown in mouse studies, to have a crucial role in promoting immunity to tumours, bacteria and viruses, and in suppressing cell-mediated autoimmunity. Many clinical studies have indicated that NKT cell deficiencies and functional defects might also contribute to similar human diseases, although there is no real consensus about the nature of the NKT cell defects or whether NKT cells could be important for the diagnosis and/or treatment of these conditions. In this Review, we describe the approaches that have been used to analyse the NKT cell populations of various patient groups, suggest new strategies to determine how (or indeed, if) NKT cell defects contribute to human disease, and discuss the prospects for using NKT cells for therapeutic benefit.
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Affiliation(s)
- Stuart P Berzins
- Department of Microbiology & Immunology, University of Melbourne, Parkville, Victoria 3010, Australia.
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30
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Jordan MA, Fletcher JM, Jose R, Chowdhury S, Gerlach N, Allison J, Baxter AG. Role of SLAM in NKT cell development revealed by transgenic complementation in NOD mice. THE JOURNAL OF IMMUNOLOGY 2011; 186:3953-65. [PMID: 21357537 DOI: 10.4049/jimmunol.1003305] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Allelic variation of SLAM expression on CD4(+)CD8(+) thymocytes has been proposed to play a major role in NKT cell development. In this article, this hypothesis is tested by the production of subcongenic mouse strains and Slamf1 transgenic lines. The long isoform of the C57BL/6 allele of Slamf1 was transgenically expressed on CD4(+)CD8(+) thymocytes under control of an hCD2 minigene. NOD.Nkrp1b.Tg(Slamf1)1 mice, which had a 2-fold increase in SLAM protein expression on CD4(+)CD8(+) thymocytes, had a 2-fold increase in numbers of thymic NKT cells. The additional thymic NKT cells in NOD.Nkrp1b.Tg(Slamf1)1 mice were relatively immature, with a similar subset distribution to those of congenic NOD.Nkrp1b.Nkt1 and NOD.Nkrp1b.Slamf1 mice, which also express increased levels of SLAM on CD4(+)CD8(+) thymocytes and produce larger numbers of NKT cells. Transgenic enhancement of SLAM expression also increased IL-4 and IL-17 production in response to TCR-mediated stimulation. Paradoxically, NOD.Nkrp1b.Tg(Slamf1)2 mice, which had a 7-fold increase in SLAM expression, showed no significant increase in NKT cells numbers; on the contrary, at high transgene copy number, SLAM expression levels correlated inversely with NKT cell numbers, consistent with a contribution to negative selection. These data confirm a role for SLAM in controlling NKT cell development and are consistent with a role in both positive and negative thymic selection of NKT cells.
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Affiliation(s)
- Margaret A Jordan
- Comparative Genomics Centre, James Cook University, Townsville, Queensland 4811, Australia
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31
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Novak J, Lehuen A. Mechanism of regulation of autoimmunity by iNKT cells. Cytokine 2010; 53:263-70. [PMID: 21185200 DOI: 10.1016/j.cyto.2010.11.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2010] [Revised: 10/06/2010] [Accepted: 11/04/2010] [Indexed: 02/07/2023]
Abstract
iNKT cells, CD1d dependent natural killer T cells are a unique population of T cells. The capacity of iNKT cells to produce regulatory cytokines first provided an indication of their regulatory potential. Later on, in experimental models as well as in patients afflicted with an auto-immune disease, such as Type 1 diabetes mellitus, multiple sclerosis, and systemic lupus erythematosus along with others, a deficit in iNKT cell number was observed, suggesting the role these cells may possibly have in the prevention of auto-immune diseases. More importantly, experimental strategies which focused on increasing the volume or stimulation of iNKT cells in laboratory animals, demonstrated an improved level of protection against the development of auto-immune diseases. This article reviews the mechanism of protection against autoimmunity by iNKT cells, discusses the obstacles against and indications for the potential use of iNKT cell manipulation in the treatment of human auto-immune diseases.
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Affiliation(s)
- Jan Novak
- 3rd Faculty of Medicine, Charles University in Prague, Centre of Research for Diabetes, Endocrinological Diseases and Clinical Nutrition, Czech Republic.
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32
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Caielli S, Sorini C, Falcone M. The dangerous liaison between iNKT cells and dendritic cells: does it prevent or promote autoimmune diseases? Autoimmunity 2010; 44:11-22. [PMID: 20672910 DOI: 10.3109/08916931003782130] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Invariant natural killer T (iNKT) cells represent an important regulatory T-cell subset that perceives signals of danger and/or cellular distress and modulate the adaptive immune response accordingly. In the presence of pathogens, iNKT cells acquire an adjuvant function that is fundamental to boost anti-microbial and anti-tumor immunity. At the same time, iNKT cells can play a negative regulatory function to maintain peripheral T-cell tolerance toward self-antigens and to prevent autoimmune disease. Both these effects of iNKT cells involve the modulation of the activity of dendritic cells (DCs) through cell-cell interaction. Indeed, iNKT cells can either boost Th1 immunity by enhancing maturation of pro-inflammatory DCs or promote immune tolerance through the maturation of tolerogenic DCs. This dual action of iNKT cells opens questions on the modalities by which a single-cell subset can exert opposite effects on DCs and may even put in question the overall immunosuppressive properties of iNKT cells. This review presents the large body of evidence that shows the ability of iNKT cells to negatively regulate autoimmunity and to prevent autoimmune diseases including multiple sclerosis, type 1 diabetes, rheumatoid arthritis, and systemic lupus erythematosus. In addition, an update is provided on the mechanisms of iNKT-DCs interactions and how this can result in inflammatory or tolerogenic responses.
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Affiliation(s)
- Simone Caielli
- Experimental Diabetes Unit, Division of Immunology, Transplantation and Infectious Diseases, San Raffaele Scientific Institute, Milan, Italy
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33
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Hillhouse EE, Beauchamp C, Chabot‐Roy G, Dugas V, Lesage S. Interleukin‐10 limits the expansion of immunoregulatory CD4
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CD8
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T cells in autoimmune‐prone non‐obese diabetic mice. Immunol Cell Biol 2010; 88:771-80. [DOI: 10.1038/icb.2010.84] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Erin E Hillhouse
- Immunology‐Oncology Section, Research Center, Maisonneuve‐Rosemont Hospital Montreal Quebec Canada
- Department of Microbiology and Immunology, University of Montreal Montreal Quebec Canada
| | - Claudine Beauchamp
- Immunology‐Oncology Section, Research Center, Maisonneuve‐Rosemont Hospital Montreal Quebec Canada
- Department of Microbiology and Immunology, University of Montreal Montreal Quebec Canada
| | - Geneviève Chabot‐Roy
- Immunology‐Oncology Section, Research Center, Maisonneuve‐Rosemont Hospital Montreal Quebec Canada
| | - Véronique Dugas
- Immunology‐Oncology Section, Research Center, Maisonneuve‐Rosemont Hospital Montreal Quebec Canada
- Department of Microbiology and Immunology, University of Montreal Montreal Quebec Canada
| | - Sylvie Lesage
- Immunology‐Oncology Section, Research Center, Maisonneuve‐Rosemont Hospital Montreal Quebec Canada
- Department of Microbiology and Immunology, University of Montreal Montreal Quebec Canada
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34
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Aktan I, Chant A, Borg ZD, Damby DE, Leenstra PC, Lilley GWJ, Lilley GWG, Petty J, Suratt BT, Teuscher C, Wakeland EK, Poynter ME, Boyson JE. Slam haplotypes modulate the response to lipopolysaccharide in vivo through control of NKT cell number and function. THE JOURNAL OF IMMUNOLOGY 2010; 185:144-56. [PMID: 20530260 DOI: 10.4049/jimmunol.0902658] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CD1d-restricted NKT cells make up an innate-like T cell subset that plays a role in amplifying the response of innate immune leukocytes to TLR ligands. The Slam locus contains genes that have been implicated in innate and adaptive immune responses. In this study, we demonstrate that divergent Slam locus haplotypes modulate the response of macrophages to the TLR4 ligand LPS through their control of NKT cell number and function. In response to LPS challenge in vivo, macrophage TNF production in Slam haplotype-2(+) 129S1/SvImJ and 129X1/SvJ mice was significantly impaired in comparison with macrophage TNF production in Slam haplotype-1(+) C57BL/6J mice. Although no cell-intrinsic differences in macrophage responses to LPS were observed between strains, 129 mice were found to be deficient in liver NKT cell number, in NKT cell cytokine production in response to the CD1d ligand alpha-galactosylceramide, and in NKT cell IFN-gamma production after LPS challenge in vivo. Using B6.129c1 congenic mice and adoptive transfer, we found that divergent Slam haplotypes controlled the response to LPS in vivo, as well as the diminished NKT cell number and function, and that these phenotypes were associated with differential expression of signaling lymphocytic activation molecule family receptors on NKT cells. These data suggest that the polymorphisms that distinguish two Slam haplotypes significantly modulate the innate immune response in vivo through their effect on NKT cells.
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Affiliation(s)
- Idil Aktan
- Department of Surgery, University of Vermont, College of Medicine, Burlington, VT 05405, USA
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35
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Wermeling F, Lind SM, Jordö ED, Cardell SL, Karlsson MCI. Invariant NKT cells limit activation of autoreactive CD1d-positive B cells. ACTA ACUST UNITED AC 2010; 207:943-52. [PMID: 20439539 PMCID: PMC2867286 DOI: 10.1084/jem.20091314] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Faulty activation of autoreactive B cells is a hallmark of autoimmune diseases like systemic lupus erythematosus (SLE). An important feature restricting activation of autoreactive B cells is efficient removal of apoptotic material. Mounting evidence also connects a primary defect in invariant natural killer T (iNKT) cells to autoimmune disease development. However, exactly how this unconventional T cell subset is involved remains to be defined. Here, we identify a suppressive role for iNKT cells in a model where autoantibody production is triggered by an increased load of circulating apoptotic cells, resembling the situation in SLE patients. Absence or reduction of iNKT cells as well as absence of CD1d-expression on B cells, needed for direct iNKT-B cell interaction, leads to increased autoreactive B cell activation and symptoms of disease. The suppression mediated by the iNKT cells is observed before B cell entry into germinal centers and can be rescued by transferring iNKT cells to deficient mice. This links iNKT cells to handling of dying cells and identifies a novel peripheral tolerance checkpoint relevant for autoimmune disease. Thus, these observations connect two clinical observations in SLE patients previously considered to be unrelated and define a new target for immunotherapy.
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Affiliation(s)
- Fredrik Wermeling
- Department of Medicine, Karolinska Institutet, 171 76 Stockholm, Sweden
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36
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Driver JP, Serreze DV, Chen YG. Mouse models for the study of autoimmune type 1 diabetes: a NOD to similarities and differences to human disease. Semin Immunopathol 2010; 33:67-87. [DOI: 10.1007/s00281-010-0204-1] [Citation(s) in RCA: 138] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2010] [Accepted: 03/18/2010] [Indexed: 01/12/2023]
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Zekavat G, Mozaffari R, Arias VJ, Rostami SY, Badkerhanian A, Tenner AJ, Nichols KE, Naji A, Noorchashm H. A novel CD93 polymorphism in non-obese diabetic (NOD) and NZB/W F1 mice is linked to a CD4+ iNKT cell deficient state. Immunogenetics 2010; 62:397-407. [PMID: 20387063 PMCID: PMC2875467 DOI: 10.1007/s00251-010-0442-3] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Accepted: 03/16/2010] [Indexed: 01/25/2023]
Abstract
In the present study, we characterize a polymorphism in the CD93 molecule, originally identified as the receptor for the C1q complement component (i.e., C1qRp, or AA4.1) in non-obese diabetic (NOD) mice. This allele carries a coding polymorphism in the first epidermal growth factor-like domain of CD93, which results in an amino acid substitution from Asn→His at position 264. This polymorphism does not appear to influence protein translation or ecto-domain cleavage, as CD93 is detectable in bone-marrow-derived macrophage and B-cell precursor lysates and in soluble form in the serum. The NOD CD93 isoform causes a phenotypic aberrancy in the early B-cell developmental stages (i.e., pro-, pre-, immature, and transitional), likely related to a conformational variation. Interestingly, the NZB/W F1 strain, which serves as a murine model of Lupus, also expresses an identical CD93 sequence polymorphism. Cd93 is located within the NOD Idd13 locus and is also tightly linked to the NZB/W F1 Wbw1 and Nkt2 disease susceptibility loci, which are thought to regulate natural killer T (NKT) cell homeostasis. Consistent with this genetic linkage, we found B6 CD93−/− and B6.NODIdd13 mice to be susceptible to a profound CD4+ NKT cell deficient state. These data suggest that Cd93 may be an autoimmune susceptibility gene residing within the Idd13 locus, which plays a role in regulating absolute numbers of CD4+ NKT cells.
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Affiliation(s)
- Ghazal Zekavat
- Harrison Department of Surgical Research, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Raha Mozaffari
- Harrison Department of Surgical Research, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Vanessa J. Arias
- School of Medicine, University of California Irvine, Irvine, CA USA
| | - Susan Y. Rostami
- Harrison Department of Surgical Research, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Armen Badkerhanian
- Harrison Department of Surgical Research, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Andrea J. Tenner
- School of Medicine, University of California Irvine, Irvine, CA USA
| | - Kim E. Nichols
- Children’s Hospital of Philadelphia, Philadelphia, PA USA
| | - Ali Naji
- Harrison Department of Surgical Research, University of Pennsylvania School of Medicine, Philadelphia, PA USA
| | - Hooman Noorchashm
- Harrison Department of Surgical Research, University of Pennsylvania School of Medicine, Philadelphia, PA USA
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38
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Hu T, Simmons A, Yuan J, Bender TP, Alberola-Ila J. The transcription factor c-Myb primes CD4+CD8+ immature thymocytes for selection into the iNKT lineage. Nat Immunol 2010; 11:435-41. [PMID: 20383148 PMCID: PMC2857587 DOI: 10.1038/ni.1865] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Accepted: 03/09/2010] [Indexed: 12/21/2022]
Abstract
Type I invariant NKT cells (iNKT cells) are a subset of alphabeta T cells characterized by the expression of an invariant alpha-chain variable region 14-alpha-chain joining region 18 (V(alpha)14J(alpha)18) T cell antigen receptor (TCR) alpha-chain. The iNKT cells derive from CD4(+)CD8(+) double-positive (DP) thymocytes, and their generation requires a long half-life of DP thymocytes to allow V(alpha)14-J(alpha)18 rearrangements, expression of glycolipid-loaded CD1d on DP thymocytes, and signaling through the signaling-activation molecule SLAM-adaptor SAP pathway. Here we show that the transcription factor c-Myb has a central role in priming DP thymocytes to enter the iNKT lineage by simultaneously regulating CD1d expression, the half-life of DP cells and expression of SLAMF1, SLAMF6 and SAP.
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Affiliation(s)
- Taishan Hu
- Immunobiology and Cancer Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA
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39
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40
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Jordan MA, Poulton LD, Fletcher JM, Baxter AG. Allelic variation of Ets1 does not contribute to NK and NKT cell deficiencies in type 1 diabetes susceptible NOD mice. Rev Diabet Stud 2009; 6:104-16. [PMID: 19806240 DOI: 10.1900/rds.2009.6.104] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
The NOD mouse is a well characterized model of type 1 diabetes that shares several of the characteristics of Ets1-deficient targeted mutant mice, viz: defects in TCR allelic exclusion, susceptibility to a lupus like disease characterized by IgM and IgG autoantibodies and immune complex-mediated glomerulonephritis, and deficiencies of NK and NKT cells. Here, we sought evidence for allelic variation of Ets1 in mice contributing to the NK and NKT cell phenotypes of the NOD strain. ETS1 expression in NK and NKT cells was reduced in NOD mice, compared to C57BL/6 mice. Although NKT cells numbers were significantly correlated with ETS1 expression in both strains, NKT cell numbers were not linked to the Ets1 gene in a first backcross from NOD to C57BL/6 mice. These results indicate that allelic variation of Ets1 did not contribute to variation in NKT cell numbers in these mice. It remains possible that a third factor not linked to the Ets1 locus controls both ETS1 expression and subsequently NK and NKT cell phenotypes.
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Affiliation(s)
- Margaret A Jordan
- Comparative Genomics Centre, Molecular Sciences Bldg 21, James Cook University, Townsville, QLD 4811, Australia
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41
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Hamilton-Williams EE, Martinez X, Clark J, Howlett S, Hunter KM, Rainbow DB, Wen L, Shlomchik MJ, Katz JD, Beilhack GF, Wicker LS, Sherman LA. Expression of diabetes-associated genes by dendritic cells and CD4 T cells drives the loss of tolerance in nonobese diabetic mice. THE JOURNAL OF IMMUNOLOGY 2009; 183:1533-41. [PMID: 19592648 DOI: 10.4049/jimmunol.0900428] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In humans and NOD mice, defects in immune tolerance result in the spontaneous development of type-1-diabetes. Recent studies have ascribed a breakdown in tolerance to dysfunction in regulatory T cells that is secondary to reduced IL-2 production by T cells having the NOD diabetes susceptibility region insulin-dependent diabetes 3 (Idd3). In this study, we demonstrate a peripheral tolerance defect in the dendritic cells of NOD mice that is independent of regulatory T cells. NOD CD8 T cells specific for islet Ags fail to undergo deletion in the pancreatic lymph nodes. Deletion was promoted by expression of the protective alleles of both Idd3 (Il2) and Idd5 in dendritic cells. We further identify a second tolerance defect that involves endogenous CD4 T cell expression of the disease-promoting NOD alleles of these genetic regions. Pervasive insulitis can be reduced by expression of the Idd3 and Idd5 protective alleles by either the Ag-presenting cell or lymphocytes.
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Affiliation(s)
- Emma E Hamilton-Williams
- Department of Immunology and Microbial Sciences, The Scripps Research Institute, La Jolla, CA 92037, USA
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42
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Kopecky-Bromberg SA, Fraser KA, Pica N, Carnero E, Moran TM, Franck RW, Tsuji M, Palese P. Alpha-C-galactosylceramide as an adjuvant for a live attenuated influenza virus vaccine. Vaccine 2009; 27:3766-74. [PMID: 19464560 DOI: 10.1016/j.vaccine.2009.03.090] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2008] [Revised: 03/10/2009] [Accepted: 03/26/2009] [Indexed: 10/20/2022]
Abstract
There is a substantial need to develop better influenza virus vaccines that can protect populations that are not adequately protected by the currently licensed vaccines. While live attenuated influenza virus vaccines induce superior immune responses compared to inactivated vaccines, the manufacturing process of both types of influenza virus vaccines is time consuming and may not be adequate during a pandemic. Adjuvants would be particularly useful if they could enhance the immune response to live attenuated influenza virus vaccines so that the amount of vaccine needed for a protective dose could be reduced. The glycolipid, alpha-galactosylceramide (alpha-GalCer), has recently been shown to have adjuvant activity for both inactivated and replicating recombinant vaccines. The goal of these experiments was to determine whether a derivative of alpha-GalCer, alpha-C-galactosylceramide (alpha-C-GalCer) can enhance the immune response elicited by a live attenuated influenza virus vaccine containing an NS1 protein truncation and reduce the amount of vaccine required to provide protection after challenge. Our results indicated that the adjuvant reduced both morbidity and mortality in BALB/c mice after challenge with wild type influenza virus. The adjuvant also increased the amount of influenza virus specific total IgG, IgG1, and IgG2a antibodies as well as IFN-gamma secreting CD8(+) T cells. By using knockout mice that are not able to generate NKT cells, we were able to demonstrate that the mechanism of adjuvant activity is dependent on NKT cells. Thus, our data indicate that stimulators of NKT cells represent a new avenue of adjuvants to pursue for live attenuated virus vaccines.
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Affiliation(s)
- Sarah A Kopecky-Bromberg
- Department of Microbiology, Mount Sinai School of Medicine, New York, NY 10029-6574, United States
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43
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Fletcher MT, Baxter AG. Clinical application of NKT cell biology in type I (autoimmune) diabetes mellitus. Immunol Cell Biol 2009; 87:315-23. [PMID: 19223852 DOI: 10.1038/icb.2009.5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Type 1 natural killer T (NKT) cells are a population of CD1d-restricted, regulatory T cells that exhibit various NK cell characteristics and rapidly produce cytokines on stimulation with glycolipid antigen. In type I diabetes (TID), NKT cells are thought to have a tolerogenic function, evidenced by NKT cell numerical and functional deficiencies in the nonobese diabetic (NOD) mouse, which when corrected, can ameliorate disease. The mechanisms by which NKT cells can mediate their immunosuppressive effects in NOD mice are still poorly understood, which makes successful clinical translation of NKT- cell-based therapies challenging. However, new insights into the genetic control of NKT cell deficiencies have provided some understanding of the genes that may control NKT cell number and function, potentially offering a new avenue for assessing TID risk in humans. Here, we review the mechanisms by which NKT cells are thought to prevent TID, discuss the evidence for involvement of NKT cells in the regulation of human TID and examine the genetic control of NKT cell number and function. A greater understanding of these areas will increase the chances of successful clinical manipulation of NKT cells to prevent or treat TID.
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Affiliation(s)
- Marie T Fletcher
- Department of Microbiology and Immunology, University of Melbourne, Parkville, Victoria, Australia
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44
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Fereidouni M, Farid Hosseini R, Jabbari Azad F, Schenkel J, Varasteh A, Mahmoudi M. Frequency of circulating iNKT cells among Iranian healthy adults. CYTOMETRY PART B-CLINICAL CYTOMETRY 2009; 78:65-9. [DOI: 10.1002/cyto.b.20489] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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45
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Ueno A, Wang J, Cheng L, Im JS, Shi Y, Porcelli SA, Yang Y. Enhanced Early Expansion and Maturation of Semi-Invariant NK T Cells Inhibited Autoimmune Pathogenesis in Congenic Nonobese Diabetic Mice. THE JOURNAL OF IMMUNOLOGY 2008; 181:6789-96. [DOI: 10.4049/jimmunol.181.10.6789] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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46
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Dufour FD, Baxter AG, Silveira PA. Interactions between B-Lymphocytes and Type 1 NKT Cells in Autoimmune Diabetes. J Immunotoxicol 2008; 5:249-57. [DOI: 10.1080/15476910802131543] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
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47
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Fletcher JM, Jordan MA, Snelgrove SL, Slattery RM, Dufour FD, Kyparissoudis K, Besra GS, Godfrey DI, Baxter AG. Congenic analysis of the NKT cell control gene Nkt2 implicates the peroxisomal protein Pxmp4. THE JOURNAL OF IMMUNOLOGY 2008; 181:3400-12. [PMID: 18714012 DOI: 10.4049/jimmunol.181.5.3400] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Type 1 NKT cells play a critical role in controlling the strength and character of adaptive and innate immune responses. We have previously reported deficiencies in the numbers and function of NKT cells in the NOD mouse strain, which is a well-validated model of type 1 diabetes and systemic lupus erythematosus. Genetic control of thymic NKT cell numbers was mapped to two linkage regions: Nkt1 on distal chromosome 1 and Nkt2 on chromosome 2. Herein, we report the production and characterization of a NOD.Nkrp1(b).Nkt2b(b) congenic mouse strain, which has increased thymic and peripheral NKT cells, a decreased incidence of type 1 diabetes, and enhanced cytokine responses in vivo and increased proliferative responses in vitro following challenge with alpha-galactosylceramide. The 19 highly differentially expressed candidate genes within the congenic region identified by microarray expression analyses included Pxmp4. This gene encodes a peroxisome-associated integral membrane protein whose only known binding partner is Pex19, an intracellular chaperone and component of the peroxisomal membrane insertion machinery encoded by a candidate for the NKT cell control gene Nkt1. These findings raise the possibility that peroxisomes play a role in modulating glycolipid availability for CD1d presentation, thereby influencing NKT cell function.
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Affiliation(s)
- Julie M Fletcher
- Comparative Genomics Centre, James Cook University, Townsville, Queensland, Australia
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48
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Affiliation(s)
- David G Bowen
- A.W. Morrow Gastroenterology and Liver Centre, Centenary Institute, Royal Prince Alfred Hospital and University of Sydney, Sydney, Australia
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49
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Vallois D, Gagnerault MC, Avner P, Rogner UC, Boitard C, Benlagha K, Herbelin A, Lepault F. Influence of a non-NK complex region of chromosome 6 on CD4+ invariant NK T cell homeostasis. THE JOURNAL OF IMMUNOLOGY 2008; 181:1753-9. [PMID: 18641312 DOI: 10.4049/jimmunol.181.3.1753] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The number and function of immunoregulatory invariant NKT (iNKT) cells are genetically controlled. A defect of iNKT cell ontogeny and function has been implicated as one causal factor of NOD mouse susceptibility to type 1 diabetes. Other factors of diabetes susceptibility, such as a decrease of regulatory T cell function or an increase in TLR1 expression, are corrected in diabetes-resistant Idd6 NOD.C3H 6.VIII congenic mice. Thus, we surmised that the iNKT cell defects found in NOD mice may also be rescued in congenic mice. Unexpectedly, we found, in both the thymus and the periphery, a 50% reduction in iNKT cell number in NOD.C3H 6.VIII mice as compared with NOD mice. This reduction only affected CD4(+) iNKT cells, and left the double negative iNKT cells unchanged. In parallel, the production of IL-4 and IFN-gamma following alpha-GalCer stimulation was proportionally reduced. Using three subcongenic strains, we have narrowed down the region controlling iNKT development within Idd6 (5.8 Mb) to Idd6.2 region (2.5 Mb). Idd6 region had no effect on NK cell number and in vivo cytotoxic activity. These results indicate that the role of iNKT cells in diabetes development is equivocal and more complex than initially considered. In addition, they bring strong evidence that the regulation of CD4(+) iNKT cell production is independent from that of DN iNKT cells, and involves genes of the Idd6 locus.
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Affiliation(s)
- David Vallois
- Institut National de la Santé et de la Recherche Médicale U561, Université Paris Descartes, Saint Vincent de Paul Hospital, Paris, France
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50
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Abstract
The immune repertoire of normal, healthy individuals contains autoreactive T cells and natural antibodies that, under normal conditions, are controlled, either through central tolerance or by the activity of immunoregulatory T cells to prevent the onset of autoimmune diseases. Over the years, several types of immunoregulatory T cells have been identified. These include natural CD4+CD25+Foxp3+T (Treg) cells and type 1 NKT cells, which develop in the thymus, as well as acquired immunoregulatory T cells, such as type 1 cells (Tr1), Th3 cells, Ts cells and anergic CD4 T cells, which all appear to be products of peripheral immune activation. While little is understood about the genetics of most types of immunoregulatory T cell, detailed information on the genetic control of NKT and Treg cells is now available and may contribute significantly to our understanding of the aetiology of autoimmune disease.
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