1
|
Chengalroyen MD. Current Perspectives and Challenges of MAIT Cell-Directed Therapy for Tuberculosis Infection. Pathogens 2023; 12:1343. [PMID: 38003807 PMCID: PMC10675005 DOI: 10.3390/pathogens12111343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 10/27/2023] [Accepted: 11/08/2023] [Indexed: 11/26/2023] Open
Abstract
Mucosal-associated invariant T (MAIT) cells are a distinct population of non-conventional T cells that have been preserved through evolution and possess properties of both innate and adaptive immune cells. They are activated through the recognition of antigens presented by non-polymorphic MR1 proteins or, alternately, can be stimulated by specific cytokines. These cells are multifaceted and exert robust antimicrobial activity against bacterial and viral infections, direct the immune response through the modulation of other immune cells, and exhibit a specialized tissue homeostasis and repair function. These distinct characteristics have instigated interest in MAIT cell biology for immunotherapy and vaccine development. This review describes the current understanding of MAIT cell activation, their role in infections and diseases with an emphasis on tuberculosis (TB) infection, and perspectives on the future use of MAIT cells in immune-mediated therapy.
Collapse
Affiliation(s)
- Melissa D Chengalroyen
- Molecular Mycobacteriology Research Unit, Institute of Infectious Disease and Molecular Medicine, Department of Pathology, University of Cape Town, Cape Town 7700, South Africa
| |
Collapse
|
2
|
Awad W, Ciacchi L, McCluskey J, Fairlie DP, Rossjohn J. Molecular insights into metabolite antigen recognition by mucosal-associated invariant T cells. Curr Opin Immunol 2023; 83:102351. [PMID: 37276819 PMCID: PMC11056607 DOI: 10.1016/j.coi.2023.102351] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 05/04/2023] [Accepted: 05/09/2023] [Indexed: 06/07/2023]
Abstract
Metabolite-based T-cell immunity is emerging as a major player in antimicrobial immunity, autoimmunity, and cancer. Here, small-molecule metabolites were identified to be captured and presented by the major histocompatibility complex class-I-related molecule (MR1) to T cells, namely mucosal-associated invariant T cells (MAIT) and diverse MR1-restricted T cells. Both MR1 and MAIT are evolutionarily conserved in many mammals, suggesting important roles in host immunity. Rational chemical modifications of these naturally occurring metabolites, termed altered metabolite ligands (AMLs), have advanced our understanding of the molecular correlates of MAIT T cell receptor (TCR)-MR1 recognition. This review provides a generalized framework for metabolite recognition and modulation of MAIT cells.
Collapse
Affiliation(s)
- Wael Awad
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia.
| | - Lisa Ciacchi
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Victoria 3000, Australia
| | - David P Fairlie
- ARC Centre of Excellence for Innovations in Peptide and Protein Science, Institute for Molecular Bioscience, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria 3800, Australia; Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, UK.
| |
Collapse
|
3
|
Mackie J, Ma CS, Tangye SG, Guerin A. The ups and downs of STAT3 function: too much, too little and human immune dysregulation. Clin Exp Immunol 2023; 212:107-116. [PMID: 36652220 PMCID: PMC10128169 DOI: 10.1093/cei/uxad007] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 12/07/2022] [Accepted: 01/18/2023] [Indexed: 01/19/2023] Open
Abstract
The STAT3 story has almost 30 years of evolving history. First identified in 1994 as a pro-inflammatory transcription factor, Signal Transducer and Activator of Transcription 3 (STAT3) has continued to be revealed as a quintessential pleiotropic signalling module spanning fields including infectious diseases, autoimmunity, vaccine responses, metabolism, and malignancy. In 2007, germline heterozygous dominant-negative loss-of-function variants in STAT3 were discovered as the most common cause for a triad of eczematoid dermatitis with recurrent skin and pulmonary infections, first described in 1966. This finding established that STAT3 plays a critical non-redundant role in immunity against some pathogens, as well as in the connective tissue, dental and musculoskeletal systems. Several years later, in 2014, heterozygous activating gain of function germline STAT3 variants were found to be causal for cases of early-onset multiorgan autoimmunity, thereby underpinning the notion that STAT3 function needed to be regulated to maintain immune homeostasis. As we and others continue to interrogate biochemical and cellular perturbations due to inborn errors in STAT3, we will review our current understanding of STAT3 function, mechanisms of disease pathogenesis, and future directions in this dynamic field.
Collapse
Affiliation(s)
- Joseph Mackie
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, NSW, Australia
| | - Cindy S Ma
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, NSW, Australia
| | - Stuart G Tangye
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, NSW, Australia
| | - Antoine Guerin
- Garvan Institute of Medical Research, Darlinghurst, NSW, Australia
- School of Clinical Medicine, Faculty of Medicine and Health, UNSW Sydney, Kensington, NSW, Australia
| |
Collapse
|
4
|
Dey M, Kim MH, Nagamine M, Karhan E, Kozhaya L, Dogan M, Unutmaz D, Ozbolat IT. Biofabrication of 3D breast cancer models for dissecting the cytotoxic response of human T cells expressing engineered MAIT cell receptors. Biofabrication 2022; 14:10.1088/1758-5090/ac925a. [PMID: 36108605 PMCID: PMC9556424 DOI: 10.1088/1758-5090/ac925a] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Accepted: 09/15/2022] [Indexed: 11/12/2022]
Abstract
Immunotherapy has revolutionized cancer treatment with the advent of advanced cell engineering techniques aimed at targeted therapy with reduced systemic toxicity. However, understanding the underlying immune-cancer interactions require development of advanced three-dimensional (3D) models of human tissues. In this study, we fabricated 3D tumor models with increasing complexity to study the cytotoxic responses of CD8+T cells, genetically engineered to express mucosal-associated invariant T (MAIT) cell receptors, towards MDA-MB-231 breast cancer cells. Homotypic MDA-MB-231 and heterotypic MDA-MB-231/human dermal fibroblast tumor spheroids were primed with precursor MAIT cell ligand 5-amino-6-D-ribitylaminouracil (5-ARU). Engineered T cells effectively eliminated tumors after a 3 d culture period, demonstrating that the engineered T cell receptor recognized major histocompatibility complex class I-related (MR1) protein expressing tumor cells in the presence of 5-ARU. Tumor cell killing efficiency of engineered T cells were also assessed by encapsulating these cells in fibrin, mimicking a tumor extracellular matrix microenvironment. Expression of proinflammatory cytokines such as interferon gamma, interleukin-13, CCL-3 indicated immune cell activation in all tumor models, post immunotherapy. Further, in corroborating the cytotoxic activity, we found that granzymes A and B were also upregulated, in homotypic as well as heterotypic tumors. Finally, a 3D bioprinted tumor model was employed to study the effect of localization of T cells with respect to tumors. T cells bioprinted proximal to the tumor had reduced invasion index and increased cytokine secretion, which indicated a paracrine mode of immune-cancer interaction. Development of 3D tumor-T cell platforms may enable studying the complex immune-cancer interactions and engineering MAIT cells for cell-based cancer immunotherapies.
Collapse
Affiliation(s)
- Madhuri Dey
- Department of Chemistry, Penn State University; University Park, PA, 16802, USA
- The Huck Institutes of the Life Sciences, Penn State University; University Park, PA 16802, USA
| | - Myong Hwan Kim
- The Huck Institutes of the Life Sciences, Penn State University; University Park, PA 16802, USA
- Biomedical Engineering Department, Penn State University; University Park, PA 16802, USA
| | - Momoka Nagamine
- Department of Chemistry, Penn State University; University Park, PA, 16802, USA
- The Huck Institutes of the Life Sciences, Penn State University; University Park, PA 16802, USA
| | - Ece Karhan
- The Jackson Laboratory for Genomic Medicine; Farmington, CT 06032, USA
| | - Lina Kozhaya
- The Jackson Laboratory for Genomic Medicine; Farmington, CT 06032, USA
| | - Mikail Dogan
- The Jackson Laboratory for Genomic Medicine; Farmington, CT 06032, USA
| | - Derya Unutmaz
- The Jackson Laboratory for Genomic Medicine; Farmington, CT 06032, USA
- University of Connecticut Health Center; Farmington, CT 06032, USA
| | - Ibrahim T. Ozbolat
- The Huck Institutes of the Life Sciences, Penn State University; University Park, PA 16802, USA
- Biomedical Engineering Department, Penn State University; University Park, PA 16802, USA
- Engineering Science and Mechanics Department, Penn State University; University Park, PA 16802, USA
- Materials Research Institute, Penn State University; University Park, PA 16802, USA
- Department of Neurosurgery, Penn State College of Medicine, Hershey, PA 17033, USA
- Penn State Cancer Institute, Penn State University, Hershey, PA 17033, USA
| |
Collapse
|
5
|
Mohamed FA, Thangavelu G, Rhee SY, Sage PT, O’Connor RS, Rathmell JC, Blazar BR. Recent Metabolic Advances for Preventing and Treating Acute and Chronic Graft Versus Host Disease. Front Immunol 2021; 12:757836. [PMID: 34712243 PMCID: PMC8546182 DOI: 10.3389/fimmu.2021.757836] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 09/13/2021] [Indexed: 01/14/2023] Open
Abstract
The therapeutic efficacy of allogeneic hematopoietic stem cell transplantation (allo-HSCT) is limited by the development of graft-versus-host disease (GVHD). In GVHD, rigorous pre-conditioning regimen resets the immune landscape and inflammatory milieu causing immune dysregulation, characterized by an expansion of alloreactive cells and a reduction in immune regulatory cells. In acute GVHD (aGVHD), the release of damage- and pathogen- associated molecular patterns from damaged tissue caused by the conditioning regimen sets the stage for T cell priming, activation and expansion further exacerbating tissue injury and organ damage, particularly in the gastrointestinal tract. Studies have shown that donor T cells utilize multiple energetic and biosynthetic pathways to mediate GVHD that can be distinct from the pathways used by regulatory T cells for their suppressive function. In chronic GVHD (cGVHD), donor T cells may differentiate into IL-21 producing T follicular helper cells or tissue resident T helper cells that cooperate with germinal center B cells or memory B cells, respectively, to produce allo- and auto-reactive antibodies with subsequent tissue fibrosis. Alternatively, donor T cells can become IFN- γ/IL-17 cytokine expressing T cells that mediate sclerodermatous skin injury. Patients refractory to the first line standard regimens for GVHD treatment have a poor prognosis indicating an urgent need for new therapies to restore the balance between effector and regulatory immune cells while preserving the beneficial graft-versus-tumor effect. Emerging data points toward a role for metabolism in regulating these allo- and auto-immune responses. Here, we will discuss the preclinical and clinical data available on the distinct metabolic demands of acute and chronic GVHD and recent efforts in identifying therapeutic targets using metabolomics. Another dimension of this review will examine the changing microbiome after allo-HSCT and the role of microbial metabolites such as short chain fatty acids and long chain fatty acids on regulating immune responses. Lastly, we will examine the metabolic implications of coinhibitory pathway blockade and cellular therapies in allo-HSCT. In conclusion, greater understanding of metabolic pathways involved in immune cell dysregulation during allo-HSCT may pave the way to provide novel therapies to prevent and treat GVHD.
Collapse
Affiliation(s)
- Fathima A. Mohamed
- Department of Pediatrics, Division of Blood & Marrow Transplant & Cellular Therapy, University of Minnesota Cancer Center, Minneapolis, MN, United States
| | - Govindarajan Thangavelu
- Department of Pediatrics, Division of Blood & Marrow Transplant & Cellular Therapy, University of Minnesota Cancer Center, Minneapolis, MN, United States
| | - Stephanie Y. Rhee
- Department of Pediatrics, Division of Blood & Marrow Transplant & Cellular Therapy, University of Minnesota Cancer Center, Minneapolis, MN, United States
| | - Peter T. Sage
- Renal Division, Transplantation Research Center, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States
| | - Roddy S. O’Connor
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Philadelphia, PA, United States
- Center for Cellular Immunotherapies, Perelman School of Medicine, Philadelphia, PA, United States
| | - Jeffrey C. Rathmell
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Bruce R. Blazar
- Department of Pediatrics, Division of Blood & Marrow Transplant & Cellular Therapy, University of Minnesota Cancer Center, Minneapolis, MN, United States
| |
Collapse
|
6
|
Fujiwara H. Crosstalk Between Intestinal Microbiota Derived Metabolites and Tissues in Allogeneic Hematopoietic Cell Transplantation. Front Immunol 2021; 12:703298. [PMID: 34512627 PMCID: PMC8429959 DOI: 10.3389/fimmu.2021.703298] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 08/09/2021] [Indexed: 12/12/2022] Open
Abstract
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is an evidence based- cellular immunotherapy for hematological malignancies. Immune reactions not only promote graft-versus-tumor effects that kill hematological malignant cells but also graft-versus-host disease (GVHD) that is the primary complication characterized by systemic organ damages consisting of T-cells and antigen presenting cells (APCs) activation. GVHD has long been recognized as an immunological reaction that requires an immunosuppressive treatment targeting immune cells. However immune suppression cannot always prevent GVHD or effectively treat it once it has developed. Recent studies using high-throughput sequencing technology investigated the impact of microbial flora on GVHD and provided profound insights of the mechanism of GVHD other than immune cells. Allo-HSCT affects the intestinal microbiota and microbiome-metabolome axis that can alter intestinal homeostasis and the severity of experimental GVHD. This axis can potentially be manipulated via dietary intervention or metabolites produced by intestinal bacteria affected post-allo-HSCT. In this review, we discuss the mechanism of experimental GVHD regulation by the complex microbial community-metabolites-host tissue axis. Furthermore, we summarize the major findings of microbiome-based immunotherapeutic approaches that protect tissues from experimental GVHD. Understanding the complex relationships between gut microbiota-metabolites-host tissues axis provides crucial insight into the pathogenesis of GVHD and advances the development of new therapeutic approaches.
Collapse
Affiliation(s)
- Hideaki Fujiwara
- Department of Hematology and Oncology, Okayama University Hospital, Okayama, Japan
| |
Collapse
|
7
|
Regulation and Functions of Protumoral Unconventional T Cells in Solid Tumors. Cancers (Basel) 2021; 13:cancers13143578. [PMID: 34298791 PMCID: PMC8304984 DOI: 10.3390/cancers13143578] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 07/02/2021] [Accepted: 07/12/2021] [Indexed: 01/03/2023] Open
Abstract
The vast majority of studies on T cell biology in tumor immunity have focused on peptide-reactive conventional T cells that are restricted to polymorphic major histocompatibility complex molecules. However, emerging evidence indicated that unconventional T cells, including γδ T cells, natural killer T (NKT) cells and mucosal-associated invariant T (MAIT) cells are also involved in tumor immunity. Unconventional T cells span the innate-adaptive continuum and possess the unique ability to rapidly react to nonpeptide antigens via their conserved T cell receptors (TCRs) and/or to activating cytokines to orchestrate many aspects of the immune response. Since unconventional T cell lineages comprise discrete functional subsets, they can mediate both anti- and protumoral activities. Here, we review the current understanding of the functions and regulatory mechanisms of protumoral unconventional T cell subsets in the tumor environment. We also discuss the therapeutic potential of these deleterious subsets in solid cancers and why further feasibility studies are warranted.
Collapse
|
8
|
Francisella tularensis induces Th1 like MAIT cells conferring protection against systemic and local infection. Nat Commun 2021; 12:4355. [PMID: 34272362 PMCID: PMC8285429 DOI: 10.1038/s41467-021-24570-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 06/15/2021] [Indexed: 02/06/2023] Open
Abstract
Mucosal-associated Invariant T (MAIT) cells are recognized for their antibacterial functions. The protective capacity of MAIT cells has been demonstrated in murine models of local infection, including in the lungs. Here we show that during systemic infection of mice with Francisella tularensis live vaccine strain results in evident MAIT cell expansion in the liver, lungs, kidney and spleen and peripheral blood. The responding MAIT cells manifest a polarised Th1-like MAIT-1 phenotype, including transcription factor and cytokine profile, and confer a critical role in controlling bacterial load. Post resolution of the primary infection, the expanded MAIT cells form stable memory-like MAIT-1 cell populations, suggesting a basis for vaccination. Indeed, a systemic vaccination with synthetic antigen 5-(2-oxopropylideneamino)-6-D-ribitylaminouracil in combination with CpG adjuvant similarly boosts MAIT cells, and results in enhanced protection against both systemic and local infections with different bacteria. Our study highlights the potential utility of targeting MAIT cells to combat a range of bacterial pathogens.
Collapse
|
9
|
Augmentation of the Riboflavin-Biosynthetic Pathway Enhances Mucosa-Associated Invariant T (MAIT) Cell Activation and Diminishes Mycobacterium tuberculosis Virulence. mBio 2021; 13:e0386521. [PMID: 35164552 PMCID: PMC8844931 DOI: 10.1128/mbio.03865-21] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Mucosa-associated invariant T (MAIT) cells play a critical role in antimicrobial defense. Despite increased understanding of their mycobacterial ligands and the clinical association of MAIT cells with tuberculosis (TB), their function in protection against Mycobacterium tuberculosis infection remains unclear. Here, we show that overexpressing key genes of the riboflavin-biosynthetic pathway potentiates MAIT cell activation and results in attenuation of M. tuberculosis virulence in vivo. Further, we observed greater control of M. tuberculosis infection in MAIThi CAST/EiJ mice than in MAITlo C57BL/6J mice, highlighting the protective role of MAIT cells against TB. We also endogenously adjuvanted Mycobacterium bovis BCG with MR1 ligands via overexpression of the lumazine synthase gene ribH and evaluated its protective efficacy in the mouse model of M. tuberculosis infection. Altogether, our findings demonstrate that MAIT cells confer host protection against TB and that overexpression of genes in the riboflavin-biosynthetic pathway attenuates M. tuberculosis virulence. Enhancing MAIT cell-mediated immunity may also offer a novel approach toward improved vaccines against TB. IMPORTANCE Mucosa-associated invariant T (MAIT) cells are an important subset of innate lymphocytes that recognize microbial ligands derived from the riboflavin biosynthesis pathway and mediate antimicrobial immune responses. Modulated MAIT cell responses have been noted in different forms of tuberculosis. However, it has been unclear if increased MAIT cell abundance is protective against TB disease. In this study, we show that augmentation of the mycobacterial MAIT cell ligands leads to higher MAIT cell activation with reduced M. tuberculosis virulence and that elevated MAIT cell abundance confers greater control of M. tuberculosis infection. Our study also highlights the potential of endogenously adjuvanting the traditional BCG vaccine with MR1 ligands to augment MAIT cell activation. This study increases current knowledge on the roles of the riboflavin-biosynthetic pathway and MAIT cell activation in M. tuberculosis virulence and host immunity against TB.
Collapse
|
10
|
Masetti R, Zama D, Leardini D, Muratore E, Turroni S, Brigidi P, Pession A. Microbiome-Derived Metabolites in Allogeneic Hematopoietic Stem Cell Transplantation. Int J Mol Sci 2021; 22:1197. [PMID: 33530464 PMCID: PMC7865777 DOI: 10.3390/ijms22031197] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 01/19/2021] [Accepted: 01/22/2021] [Indexed: 02/07/2023] Open
Abstract
The gut microbiome has emerged as a major character in the context of hematopoietic stem cell transplantation. The biology underpinning this relationship is still to be defined. Recently, mounting evidence has suggested a role for microbiome-derived metabolites in mediating crosstalk between intestinal microbial communities and the host. Some of these metabolites, such as fiber-derived short-chain fatty acids or amino acid-derived compounds, were found to have a role also in the transplant setting. New interesting data have been published on this topic, posing a new intriguing perspective on comprehension and treatment. This review provides an updated comprehensive overview of the available evidence in the field of gut microbiome-derived metabolites and hematopoietic stem cell transplantation.
Collapse
Affiliation(s)
- Riccardo Masetti
- Pediatric Oncology and Hematology “Lalla Seràgnoli”, Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (R.M.); (D.Z.); (E.M.); (A.P.)
| | - Daniele Zama
- Pediatric Oncology and Hematology “Lalla Seràgnoli”, Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (R.M.); (D.Z.); (E.M.); (A.P.)
| | - Davide Leardini
- Pediatric Oncology and Hematology “Lalla Seràgnoli”, Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (R.M.); (D.Z.); (E.M.); (A.P.)
| | - Edoardo Muratore
- Pediatric Oncology and Hematology “Lalla Seràgnoli”, Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (R.M.); (D.Z.); (E.M.); (A.P.)
| | - Silvia Turroni
- Unit of Microbial Ecology of Health, Department of Pharmacy and Biotechnology, University of Bologna, 40126 Bologna, Italy;
| | - Patrizia Brigidi
- Department of Medical and Surgical Sciences (DIMEC), University of Bologna, 40126 Bologna, Italy;
| | - Andrea Pession
- Pediatric Oncology and Hematology “Lalla Seràgnoli”, Pediatric Unit, IRCCS Azienda Ospedaliero-Universitaria di Bologna, 40138 Bologna, Italy; (R.M.); (D.Z.); (E.M.); (A.P.)
| |
Collapse
|
11
|
Abstract
Tuberculosis (TB) is a serious global public health challenge that results in significant morbidity and mortality worldwide. TB is caused by infection with the bacilli Mycobacterium tuberculosis (M. tuberculosis), which has evolved a wide variety of strategies in order to thrive within its host. Understanding the complex interactions between M. tuberculosis and host immunity can inform the rational design of better TB vaccines and therapeutics. This chapter covers innate and adaptive immunity against M. tuberculosis infection, including insights on bacterial immune evasion and subversion garnered from animal models of infection and human studies. In addition, this chapter discusses the immunology of the TB granuloma, TB diagnostics, and TB comorbidities. Finally, this chapter provides a broad overview of the current TB vaccine pipeline.
Collapse
|
12
|
Wong EB, Gold MC, Meermeier EW, Xulu BZ, Khuzwayo S, Sullivan ZA, Mahyari E, Rogers Z, Kløverpris H, Sharma PK, Worley AH, Lalloo U, Baijnath P, Ambaram A, Naidoo L, Suleman M, Madansein R, McLaren JE, Ladell K, Miners KL, Price DA, Behar SM, Nielsen M, Kasprowicz VO, Leslie A, Bishai WR, Ndung’u T, Lewinsohn DM. TRAV1-2 + CD8 + T-cells including oligoconal expansions of MAIT cells are enriched in the airways in human tuberculosis. Commun Biol 2019; 2:203. [PMID: 31231693 PMCID: PMC6549148 DOI: 10.1038/s42003-019-0442-2] [Citation(s) in RCA: 48] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Accepted: 04/24/2019] [Indexed: 12/12/2022] Open
Abstract
Mucosal-associated invariant T (MAIT) cells typically express a TRAV1-2+ semi-invariant TCRα that enables recognition of bacterial, mycobacterial, and fungal riboflavin metabolites presented by MR1. MAIT cells are associated with immune control of bacterial and mycobacterial infections in murine models. Here, we report that a population of pro-inflammatory TRAV1-2+ CD8+ T cells are present in the airways and lungs of healthy individuals and are enriched in bronchoalveolar fluid of patients with active pulmonary tuberculosis (TB). High-throughput T cell receptor analysis reveals oligoclonal expansions of canonical and donor-unique TRAV1-2+ MAIT-consistent TCRα sequences within this population. Some of these cells demonstrate MR1-restricted mycobacterial reactivity and phenotypes suggestive of MAIT cell identity. These findings demonstrate enrichment of TRAV1-2+ CD8+ T cells with MAIT or MAIT-like features in the airways during active TB and suggest a role for these cells in the human pulmonary immune response to Mycobacterium tuberculosis.
Collapse
Affiliation(s)
- Emily B. Wong
- Africa Health Research Institute, KwaZulu-Natal, South Africa
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, MA USA
- Harvard Medical School, Boston, MA USA
- Division of Infection and Immunity, University College London, London, UK
| | - Marielle C. Gold
- Department of Pulmonary & Critical Care Medicine, Oregon Health & Science University, Portland, OR USA
- VA Portland Health Care System, Portland, OR USA
- Department of Molecular Microbiology & Immunology, Oregon Health & Science University, Portland, OR USA
| | - Erin W. Meermeier
- Department of Pulmonary & Critical Care Medicine, Oregon Health & Science University, Portland, OR USA
| | - Bongiwe Z. Xulu
- Africa Health Research Institute, KwaZulu-Natal, South Africa
| | - Sharon Khuzwayo
- Africa Health Research Institute, KwaZulu-Natal, South Africa
| | | | - Eisa Mahyari
- Division of Bioinformatics and Computational Biology (BCB), Department of Medical Informatics and Clinical Epidemiology (DMICE), Oregon Health & Science University, Portland, OR USA
| | - Zoe Rogers
- Africa Health Research Institute, KwaZulu-Natal, South Africa
| | - Hénrik Kløverpris
- Africa Health Research Institute, KwaZulu-Natal, South Africa
- Division of Infection and Immunity, University College London, London, UK
- Institute for Immunology and Microbiology, University of Copenhagen, Copenhagen, Denmark
| | | | | | - Umesh Lalloo
- Durban University of Technology, Durban, South Africa
| | - Prinita Baijnath
- Durban University of Technology, Durban, South Africa
- Department of Pulmonology, Inkosi Albert Luthuli Hospital, Durban, South Africa
| | - Anish Ambaram
- Department of Pulmonology, Inkosi Albert Luthuli Hospital, Durban, South Africa
| | - Leon Naidoo
- Department of Pulmonology, Inkosi Albert Luthuli Hospital, Durban, South Africa
| | - Moosa Suleman
- Department of Pulmonology, Inkosi Albert Luthuli Hospital, Durban, South Africa
- Department of Pulmonology & Critical Care, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa
| | - Rajhmun Madansein
- Department of Cardiothoracic Surgery, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa
- Centre for AIDS Programme of Research in South Africa (CAPRISA), Durban, South Africa
| | - James E. McLaren
- Institute of Infection & Immunity, Cardiff University School of Medicine, Cardiff, Wales UK
| | - Kristin Ladell
- Institute of Infection & Immunity, Cardiff University School of Medicine, Cardiff, Wales UK
| | - Kelly L. Miners
- Institute of Infection & Immunity, Cardiff University School of Medicine, Cardiff, Wales UK
| | - David A. Price
- Institute of Infection & Immunity, Cardiff University School of Medicine, Cardiff, Wales UK
- Human Immunology Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland USA
| | - Samuel M. Behar
- Department of Microbiology and Physiological Systems, University of Massachusetts Medical School, Worcester, MA USA
| | - Morten Nielsen
- Center for Biological Sequence Analysis, Department of Bio and Health Informatics, Technical University of Denmark, Lyngby, Denmark
- Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, Buenos Aires, Argentina
| | - Victoria O. Kasprowicz
- Africa Health Research Institute, KwaZulu-Natal, South Africa
- HIV Pathogenesis Programme, Doris Duke Medical Research Institute, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa
- The Ragon Institute of MGH, MIT, and Harvard, Harvard Medical School, Cambridge, MA USA
| | - Alasdair Leslie
- Africa Health Research Institute, KwaZulu-Natal, South Africa
- Division of Infection and Immunity, University College London, London, UK
| | - William R. Bishai
- Division of Infectious Diseases, Johns Hopkins University School of Medicine, Baltimore, MD USA
| | - Thumbi Ndung’u
- Africa Health Research Institute, KwaZulu-Natal, South Africa
- Instituto de Investigaciones Biotecnológicas, Universidad Nacional de San Martín, Buenos Aires, Argentina
- HIV Pathogenesis Programme, Doris Duke Medical Research Institute, Nelson R. Mandela School of Medicine, University of KwaZulu-Natal, Durban, South Africa
- The Ragon Institute of MGH, MIT, and Harvard, Harvard Medical School, Cambridge, MA USA
- Max Planck Institute for Infection Biology, Berlin, Germany
| | - David M. Lewinsohn
- Department of Pulmonary & Critical Care Medicine, Oregon Health & Science University, Portland, OR USA
- VA Portland Health Care System, Portland, OR USA
- Department of Molecular Microbiology & Immunology, Oregon Health & Science University, Portland, OR USA
| |
Collapse
|
13
|
Host Defenses to Extracellular Bacteria. Clin Immunol 2019. [DOI: 10.1016/b978-0-7020-6896-6.00027-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
14
|
Jiang J, Natarajan K, Margulies DH. MHC Molecules, T cell Receptors, Natural Killer Cell Receptors, and Viral Immunoevasins-Key Elements of Adaptive and Innate Immunity. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1172:21-62. [PMID: 31628650 DOI: 10.1007/978-981-13-9367-9_2] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Molecules encoded by the Major Histocompatibility Complex (MHC) bind self or foreign peptides and display these at the cell surface for recognition by receptors on T lymphocytes (designated T cell receptors-TCR) or on natural killer (NK) cells. These ligand/receptor interactions govern T cell and NK cell development as well as activation of T memory and effector cells. Such cells participate in immunological processes that regulate immunity to various pathogens, resistance and susceptibility to cancer, and autoimmunity. The past few decades have witnessed the accumulation of a huge knowledge base of the molecular structures of MHC molecules bound to numerous peptides, of TCRs with specificity for many different peptide/MHC (pMHC) complexes, of NK cell receptors (NKR), of MHC-like viral immunoevasins, and of pMHC/TCR and pMHC/NKR complexes. This chapter reviews the structural principles that govern peptide/MHC (pMHC), pMHC/TCR, and pMHC/NKR interactions, for both MHC class I (MHC-I) and MHC class II (MHC-II) molecules. In addition, we discuss the structures of several representative MHC-like molecules. These include host molecules that have distinct biological functions, as well as virus-encoded molecules that contribute to the evasion of the immune response.
Collapse
Affiliation(s)
- Jiansheng Jiang
- Molecular Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bldg. 10, Room 11D07, 10 Center Drive, Bethesda, MD, 20892-1892, USA.
| | - Kannan Natarajan
- Molecular Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bldg. 10, Room 11D07, 10 Center Drive, Bethesda, MD, 20892-1892, USA
| | - David H Margulies
- Molecular Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bldg. 10, Room 11D12, 10 Center Drive, Bethesda, MD, 20892-1892, USA
| |
Collapse
|
15
|
Kjer-Nielsen L, Corbett AJ, Chen Z, Liu L, Mak JY, Godfrey DI, Rossjohn J, Fairlie DP, McCluskey J, Eckle SB. An overview on the identification of MAIT cell antigens. Immunol Cell Biol 2018; 96:573-587. [PMID: 29656544 DOI: 10.1111/imcb.12057] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Revised: 04/05/2018] [Accepted: 04/05/2018] [Indexed: 12/11/2022]
Abstract
Mucosal associated invariant T (MAIT) cells are restricted by the monomorphic MHC class I-like molecule, MHC-related protein-1 (MR1). Until 2012, the origin of the MAIT cell antigens (Ags) was unknown, although it was established that MAIT cells could be activated by a broad range of bacteria and yeasts, possibly suggesting a conserved Ag. Using a combination of protein chemistry, mass spectrometry, cellular biology, structural biology and small molecule chemistry, we discovered MR1 ligands derived from folic acid (vitamin B9) and from an intermediate in the microbial biosynthesis of riboflavin (vitamin B2). While the folate derivative 6-formylpterin generally inhibited MAIT cell activation, two riboflavin pathway derivatives, 5-(2-oxopropylideneamino)-6-D-ribitylaminouracil and 5-(2-oxoethylideneamino)-6-D-ribitylaminouracil, were potent MAIT cell agonists. Other intermediates and derivatives of riboflavin synthesis displayed weak or no MAIT cell activation. Collectively, these studies revealed that in addition to peptide and lipid-based Ags, small molecule natural product metabolites are also ligands that can activate T cells expressing αβ T-cell receptors, and here we recount this discovery.
Collapse
Affiliation(s)
- Lars Kjer-Nielsen
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, 3000, Australia
| | - Alexandra J Corbett
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, 3000, Australia
| | - Zhenjun Chen
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, 3000, Australia
| | - Ligong Liu
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, 4072, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Jeffrey Yw Mak
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, 4072, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Dale I Godfrey
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, 3000, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Melbourne, Melbourne, VIC, 3000, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3800, Australia.,Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3800, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, VIC, 3800, Australia.,Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, CF14 4XN, UK
| | - David P Fairlie
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD, 4072, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, 3000, Australia
| | - Sidonia Bg Eckle
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, 3000, Australia
| |
Collapse
|
16
|
Shey MS, Balfour A, Wilkinson KA, Meintjes G. Contribution of APCs to mucosal-associated invariant T cell activation in infectious disease and cancer. Innate Immun 2018; 24:192-202. [PMID: 29631470 PMCID: PMC6139754 DOI: 10.1177/1753425918768695] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
APCs such as monocytes and dendritic cells are among the first cells to recognize
invading pathogens and initiate an immune response. The innate response can
either eliminate the pathogen directly, or through presentation of Ags to T
cells, which can help to clear the infection. Mucosal-associated invariant T
(MAIT) cells are among the unconventional T cells whose activation does not
involve the classical co-stimulation during Ag presentation. MAIT cells can be
activated either via presentation of unconventional Ags (such as riboflavin
metabolites) through the evolutionarily conserved major histocompatibility class
I-like molecule, MR1, or directly by cytokines such as IL-12 and IL-18. Given
that APCs produce cytokines and can express MR1, these cells can play an
important role in both pathways of MAIT cell activation. In this review, we
summarize evidence on the role of APCs in MAIT cell activation in infectious
disease and cancer. A better understanding of the interactions between APCs and
MAIT cells is important in further elucidating the role of MAIT cells in
infectious diseases, which may facilitate the design of novel interventions such
as vaccines.
Collapse
Affiliation(s)
- Muki Shehu Shey
- 1 Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory 7925, South Africa.,2 Department of Medicine, Faculty of Health Sciences University of Cape Town, Observatory 7925, South Africa
| | - Avuyonke Balfour
- 1 Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory 7925, South Africa.,2 Department of Medicine, Faculty of Health Sciences University of Cape Town, Observatory 7925, South Africa
| | - Katalin Andrea Wilkinson
- 1 Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory 7925, South Africa.,2 Department of Medicine, Faculty of Health Sciences University of Cape Town, Observatory 7925, South Africa.,3 The Francis Crick Institute, Midland Road, London, NW1 2AT
| | - Graeme Meintjes
- 1 Wellcome Centre for Infectious Diseases Research in Africa, Institute of Infectious Diseases and Molecular Medicine, University of Cape Town, Observatory 7925, South Africa.,2 Department of Medicine, Faculty of Health Sciences University of Cape Town, Observatory 7925, South Africa
| |
Collapse
|
17
|
Varelias A, Bunting MD, Ormerod KL, Koyama M, Olver SD, Straube J, Kuns RD, Robb RJ, Henden AS, Cooper L, Lachner N, Gartlan KH, Lantz O, Kjer-Nielsen L, Mak JY, Fairlie DP, Clouston AD, McCluskey J, Rossjohn J, Lane SW, Hugenholtz P, Hill GR. Recipient mucosal-associated invariant T cells control GVHD within the colon. J Clin Invest 2018; 128:1919-1936. [PMID: 29629900 DOI: 10.1172/jci91646] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Accepted: 02/16/2018] [Indexed: 12/11/2022] Open
Abstract
Mucosal-associated invariant T (MAIT) cells are a unique innate-like T cell subset that responds to a wide array of bacteria and yeast through recognition of riboflavin metabolites presented by the MHC class I-like molecule MR1. Here, we demonstrate using MR1 tetramers that recipient MAIT cells are present in small but definable numbers in graft-versus-host disease (GVHD) target organs and protect from acute GVHD in the colon following bone marrow transplantation (BMT). Consistent with their preferential juxtaposition to microbial signals in the colon, recipient MAIT cells generate large amounts of IL-17A, promote gastrointestinal tract integrity, and limit the donor alloantigen presentation that in turn drives donor Th1 and Th17 expansion specifically in the colon after BMT. Allogeneic BMT recipients deficient in IL-17A also develop accelerated GVHD, suggesting MAIT cells likely regulate GVHD, at least in part, by the generation of this cytokine. Indeed, analysis of stool microbiota and colon tissue from IL-17A-/- and MR1-/- mice identified analogous shifts in microbiome operational taxonomic units (OTU) and mediators of barrier integrity that appear to represent pathways controlled by similar, IL-17A-dependent mechanisms. Thus, MAIT cells act to control barrier function to attenuate pathogenic T cell responses in the colon and, given their very high frequency in humans, likely represent an important population in clinical BMT.
Collapse
Affiliation(s)
- Antiopi Varelias
- Bone Marrow Transplantation Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia.,Faculty of Medicine, and
| | - Mark D Bunting
- Bone Marrow Transplantation Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Kate L Ormerod
- Australian Centre for Ecogenomics, The University of Queensland, Brisbane, Australia
| | - Motoko Koyama
- Bone Marrow Transplantation Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Stuart D Olver
- Bone Marrow Transplantation Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Jasmin Straube
- Gordon and Jessie Gilmour Leukaemia Research Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Rachel D Kuns
- Bone Marrow Transplantation Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Renee J Robb
- Bone Marrow Transplantation Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Andrea S Henden
- Bone Marrow Transplantation Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia.,The Royal Brisbane and Women's Hospital, Brisbane, Australia
| | - Leanne Cooper
- Gordon and Jessie Gilmour Leukaemia Research Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Nancy Lachner
- Australian Centre for Ecogenomics, The University of Queensland, Brisbane, Australia
| | - Kate H Gartlan
- Bone Marrow Transplantation Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia.,Faculty of Medicine, and
| | - Olivier Lantz
- INSERM U932 and Department de Biologie des Tumeurs, Institute Curie and Centre d'Investigation Clinique, CICBT507 IGR/Curie, Paris, France
| | - Lars Kjer-Nielsen
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Australia
| | - Jeffrey Yw Mak
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
| | - David P Fairlie
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Australia
| | | | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program and The Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute Monash University, Clayton, Australia.,Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, United Kingdom.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Australia
| | - Steven W Lane
- Faculty of Medicine, and.,Gordon and Jessie Gilmour Leukaemia Research Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia.,The Royal Brisbane and Women's Hospital, Brisbane, Australia
| | - Philip Hugenholtz
- Australian Centre for Ecogenomics, The University of Queensland, Brisbane, Australia
| | - Geoffrey R Hill
- Bone Marrow Transplantation Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia.,Faculty of Medicine, and.,The Royal Brisbane and Women's Hospital, Brisbane, Australia
| |
Collapse
|
18
|
Gherardin NA, Loh L, Admojo L, Davenport AJ, Richardson K, Rogers A, Darcy PK, Jenkins MR, Prince HM, Harrison SJ, Quach H, Fairlie DP, Kedzierska K, McCluskey J, Uldrich AP, Neeson PJ, Ritchie DS, Godfrey DI. Enumeration, functional responses and cytotoxic capacity of MAIT cells in newly diagnosed and relapsed multiple myeloma. Sci Rep 2018. [PMID: 29515123 PMCID: PMC5841305 DOI: 10.1038/s41598-018-22130-1] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Mucosal-associated invariant T (MAIT) cells are T cells that recognise vitamin-B derivative Ag presented by the MHC-related-protein 1 (MR1) antigen-presenting molecule. While MAIT cells are highly abundant in humans, their role in tumour immunity remains unknown. Here we have analysed the frequency and function of MAIT cells in multiple myeloma (MM) patients. We show that MAIT cell frequency in blood is reduced compared to healthy adult donors, but comparable to elderly healthy control donors. Furthermore, there was no evidence that MAIT cells accumulated at the disease site (bone marrow) of these patients. Newly diagnosed MM patient MAIT cells had reduced IFNγ production and CD27 expression, suggesting an exhausted phenotype, although IFNγ-producing capacity is restored in relapsed/refractory patient samples. Moreover, immunomodulatory drugs Lenalidomide and Pomalidomide, indirectly inhibited MAIT cell activation. We further show that cell lines can be pulsed with vitamin-B derivative Ags and that these can be presented via MR1 to MAIT cells in vitro, to induce cytotoxic activity comparable to that of natural killer (NK) cells. Thus, MAIT cells are reduced in MM patients, which may contribute to disease in these individuals, and moreover, MAIT cells may represent new immunotherapeutic targets for treatment of MM and other malignancies.
Collapse
Affiliation(s)
- Nicholas A Gherardin
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, 3010, Australia.,Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,ARC Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria, 3010, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - Liyen Loh
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Lorenztino Admojo
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - Alexander J Davenport
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - Kelden Richardson
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - Amy Rogers
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - Phillip K Darcy
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - Misty R Jenkins
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, 3050, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - H Miles Prince
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,Clinical Haematology and Bone Marrow Transplant Service, Royal Melbourne Hospital, Parkville, Victoria, 3002, Australia.,Department of Medicine, University of Melbourne, Parkville, Victoria, 3010, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - Simon J Harrison
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,Clinical Haematology and Bone Marrow Transplant Service, Royal Melbourne Hospital, Parkville, Victoria, 3002, Australia.,Department of Medicine, University of Melbourne, Parkville, Victoria, 3010, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - Hang Quach
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,Department of Medicine, University of Melbourne, Parkville, Victoria, 3010, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - David P Fairlie
- Division of Chemistry & Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, 4072, Australia.,ARC Centre of Excellence in Advanced Molecular Imaging, University of Queensland, Queensland, 4072, Australia
| | - Katherine Kedzierska
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Adam P Uldrich
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, 3010, Australia.,ARC Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria, 3010, Australia
| | - Paul J Neeson
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - David S Ritchie
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Victoria, 3000, Australia.,Clinical Haematology and Bone Marrow Transplant Service, Royal Melbourne Hospital, Parkville, Victoria, 3002, Australia.,Department of Medicine, University of Melbourne, Parkville, Victoria, 3010, Australia.,Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, 3010, Australia
| | - Dale I Godfrey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, 3010, Australia. .,ARC Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria, 3010, Australia.
| |
Collapse
|
19
|
Chen R, Zhang L, Qi J, Zhang N, Zhang L, Yao S, Wu Y, Jiang B, Wang Z, Yuan H, Zhang Q, Xia C. Discovery and Analysis of Invertebrate IgV J-C2 Structure from Amphioxus Provides Insight into the Evolution of the Ig Superfamily. THE JOURNAL OF IMMUNOLOGY 2018. [PMID: 29514951 DOI: 10.4049/jimmunol.1700906] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The emergence of adaptive immunity in jawed vertebrates depended on the appearance of variable immune receptors, BCRs and TCRs, which exhibit variable-J-constant (VJ-C)-type Ig superfamily folds. Hitherto, however, the structures of IgV-J-IgC-type molecules had never been characterized in invertebrates, leaving the origin of BCR/TCR-type molecules unknown. Using x-ray crystallography, the structure of a VJ-C2 molecule, named AmpIgVJ-C2, was determined in amphioxus (Branchiostoma floridae). The first domain shows typical V folding, including the hydrophobic core, CDR analogs, and eight conserved residues. The second domain is a C2-type Ig superfamily domain, as defined by its short length and the absence of β-strand D- and C1-typical motifs. AmpIgVJ-C2 molecules form homodimers, using "three-layer packing dimerization," as described for TCRs and BCRs. The AmpIgVJ-C2 V domain harbors a diglycine motif in β-strand G and forms a β-bulge structure participating in V-V intermolecular interaction. By immunohistochemistry, AmpIgVJ-C2 molecules were primarily found in mucosal tissues, whereas PCR and sequence analysis indicated considerable genetic variation at the single-gene level; these findings would be consistent with an immune function and a basic ability to adapt to binding different immune targets. Our results show a BCR/TCR-ancestral like molecule in amphioxus and help us to understand the evolution of the adaptive immune system.
Collapse
Affiliation(s)
- Rong Chen
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China.,Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture, National Center for Engineering Research of Veterinary Bio-products, Xuanwu District, Nanjing 210014, China
| | - Lijie Zhang
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China
| | - Jianxun Qi
- Chinese Academy of Sciences Key Laboratory of Pathogenic Microbiology Immunology, Institute of Microbiology, Chinese Academy of Sciences, Chaoyang District, Beijing 100101, China
| | - Nianzhi Zhang
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China
| | - Ling Zhang
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China
| | - Shugang Yao
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China
| | - Yanan Wu
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China
| | - Bo Jiang
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China
| | - Zhenbao Wang
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China
| | - Hongyu Yuan
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China
| | - Qiujin Zhang
- College of Life Sciences, Fujian Normal University, Fujian 350117, China; and
| | - Chun Xia
- Department of Microbiology and Immunology, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China; .,Key Laboratory of Animal Epidemiology and Zoonosis, Ministry of Agriculture, College of Veterinary Medicine, China Agricultural University, Haidian District, Beijing 100094, China
| |
Collapse
|
20
|
Awad W, Le Nours J, Kjer-Nielsen L, McCluskey J, Rossjohn J. Mucosal-associated invariant T cell receptor recognition of small molecules presented by MR1. Immunol Cell Biol 2018; 96:588-597. [PMID: 29393543 DOI: 10.1111/imcb.12017] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 01/25/2018] [Accepted: 01/28/2018] [Indexed: 12/11/2022]
Abstract
The major histocompatibility complex (MHC) class-I related molecule MR1 is a monomorphic and evolutionary conserved antigen (Ag)-presenting molecule that shares the overall architecture of MHC-I and CD1 proteins. However, in contrast to MHC-I and the CD1 family that present peptides and lipids, respectively, MR1 specifically presents small organic molecules. During microbial infection of mammalian cells, MR1 captures and presents vitamin B precursors, derived from the microbial biosynthesis of riboflavin, on the surface of antigen-presenting cells. These MR1-Ag complexes are recognized by the mucosal-associated invariant T cell receptor (MAIT TCR), which subsequently leads to MAIT cell activation. Recently, MR1 was shown to trap chemical scaffolds including drug and drug-like molecules. Here, we review this metabolite Ag-presenting molecule and further define the key molecular interactions underlying the recognition and reactivity of MAIT TCRs to MR1 in an Ag-dependent manner.
Collapse
Affiliation(s)
- Wael Awad
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3800, Australia
| | - Jérôme Le Nours
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3800, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, VIC, 3800, Australia
| | - Lars Kjer-Nielsen
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, VIC, 3010, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, VIC, 3010, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC, 3800, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, VIC, 3800, Australia.,Division of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff, CF14 4XN, UK
| |
Collapse
|
21
|
Patient-Centered Research Priorities for Pulmonary Nontuberculous Mycobacteria (NTM) Infection. An NTM Research Consortium Workshop Report. Ann Am Thorac Soc 2018; 13:S379-84. [PMID: 27627485 DOI: 10.1513/annalsats.201605-387ws] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Nontuberculous mycobacteria (NTM) cause an increasingly important chronic and debilitating lung disease in older adults. Diagnosis is often delayed, although awareness among clinicians and patients is increasing. When necessary, treatment often lasts 18-24 months and consists of three or four antibiotics that can have serious side effects. Relapses are common and commonly require resumption of prolonged therapy. Given the need for improved diagnostic techniques and clinical trials to identify new therapies or to improve existing therapies, a group of North American clinicians and researchers formed the NTM Research Consortium (NTMRC) in 2014. The NTMRC recognized the importance of including the patient voice in determining research priorities for NTM. In November 2015, patients, caregivers, patient advocates, clinical experts, and researchers gathered for a 1-day meeting in Portland, Oregon funded by the Patient-Centered Outcomes Research Institute. The meeting goal was to define patient-centered research priorities for NTM lung infections. Patients expressed frustration with the number of people who have endured years of missed diagnoses or inadequate treatment of NTM. Participants identified as top research priorities the prevention of NTM infection; approval of more effective treatments with fewer side effects and easier administration; understanding the best chest physiotherapy methods; validating and using tools to measure quality of life; and developing a disease-specific activity and severity assessment tool. Workshop participants agreed that two complementary objectives are critical to ensure the best achievable outcomes for patients: (1) additional clinician education to improve screening and diagnosis of NTM infections; and (2) development of a geographically distributed network of experts in NTM disease to offer consultation or direct therapy after a diagnosis is made.
Collapse
|
22
|
Constantinides MG. Interactions between the microbiota and innate and innate-like lymphocytes. J Leukoc Biol 2017; 103:409-419. [PMID: 29345366 DOI: 10.1002/jlb.3ri0917-378r] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2017] [Revised: 11/21/2017] [Accepted: 11/24/2017] [Indexed: 12/18/2022] Open
Abstract
The microbiota, which consists of commensal bacteria, fungi, and viruses, limits the colonization of pathogens at barrier tissues and promotes immune homeostasis. The latter is accomplished through the induction and regulation of both innate and adaptive immune responses. Innate lymphocytes, which include the type-1 innate lymphoid cell (ILC1), NK cell, type-2 innate lymphoid cell (ILC2), type-3 innate lymphoid cell (ILC3), and lymphoid tissue inducer (LTi) cell populations, and innate-like lymphocytes, such as NKT cells, mucosal-associated invariant T (MAIT) cells, and γδ T cells, are uniquely capable of responding to the microbiota due to their tissue localization and rapid primary responses. In turn, through their effector functions, these lymphocyte populations modulate the composition of the microbiota and maintain the segregation of commensals. This review will focus on how innate and innate-like lymphocytes mediate the crosstalk with the microbiome.
Collapse
Affiliation(s)
- Michael G Constantinides
- Mucosal Immunology Section, Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, USA
| |
Collapse
|
23
|
Kumar V, Ahmad A. Role of MAIT cells in the immunopathogenesis of inflammatory diseases: New players in old game. Int Rev Immunol 2017; 37:90-110. [PMID: 29106304 DOI: 10.1080/08830185.2017.1380199] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Current advances in immunology have led to the identification of a population of novel innate immune T cells, called mucosa-associated invariant T (MAIT) cells. The cells in humans express an invariant TCRα chain (Vα7.2-Jα33) paired with a limited subset of TCRβ chains (Vβ2, 13 and 22), are restricted by the MHC class I (MH1)-related (MR)-1, and recognize molecules that are produced in the bacterial riboflavin (vitamin B2) biosynthetic pathway. They are present in the circulation, liver and at various mucosal sites (i.e. intestine, lungs and female reproductive tract, etc.). They kill host cells infected with bacteria and yeast, and secrete soluble mediators such as TNF-α, IFN-γ, IL-17, etc. The cells regulate immune responses and inflammation associated with a wide spectrum of acute and chronic diseases in humans. Since their discovery in 1993, significant advances have been made in understanding biology of MAIT cells and the potential role of these cells in the pathogenesis of autoimmune, inflammatory and infectious diseases as well as cancer in humans. The purpose of this review is to provide a current state of our knowledge about MAIT cell biology and delineate their role in autoimmune and inflammatory diseases (sterile or caused by infectious agents) and cancer in humans. A better understanding of the role of MAIT cells in human diseases may lead to novel ways of immunotherapies.
Collapse
Affiliation(s)
- Vijay Kumar
- a Department of Paediatrics and Child Care , Children's Health Queensland Clinical unit School of Medicine, Mater Research, Faculty of Medicine and Biomedical Sciences, University of Queensland , ST Lucia, Brisbane , Queensland , Australia
| | - Ali Ahmad
- b Laboratory of Innate Immunity, CHU Ste-Justine/Department of Microbiology , Infectious Diseases & Immunology, University of Montreal , Montreal , Quebec , Canada
| |
Collapse
|
24
|
Meierovics AI, Cowley SC. MAIT cells promote inflammatory monocyte differentiation into dendritic cells during pulmonary intracellular infection. J Exp Med 2016; 213:2793-2809. [PMID: 27799620 PMCID: PMC5110023 DOI: 10.1084/jem.20160637] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 07/14/2016] [Accepted: 09/29/2016] [Indexed: 12/24/2022] Open
Abstract
Cowley and Meierovics show that mucosa-associated invariant T (MAIT) cells promote the differentiation of monocytes into monocyte-derived dendritic cells during Francisella tularensis LVS pulmonary infection. Mucosa-associated invariant T (MAIT) cells are a unique innate T cell subset that is necessary for rapid recruitment of activated CD4+ T cells to the lungs after pulmonary F. tularensis LVS infection. Here, we investigated the mechanisms behind this effect. We provide evidence to show that MAIT cells promote early differentiation of CCR2-dependent monocytes into monocyte-derived DCs (Mo-DCs) in the lungs after F. tularensis LVS pulmonary infection. Adoptive transfer of Mo-DCs to MAIT cell–deficient mice (MR1−/− mice) rescued their defect in the recruitment of activated CD4+ T cells to the lungs. We further demonstrate that MAIT cell–dependent GM-CSF production stimulated monocyte differentiation in vitro, and that in vivo production of GM-CSF was delayed in the lungs of MR1−/− mice. Finally, GM-CSF–deficient mice exhibited a defect in monocyte differentiation into Mo-DCs that was phenotypically similar to MR1−/− mice. Overall, our data demonstrate that MAIT cells promote early pulmonary GM-CSF production, which drives the differentiation of inflammatory monocytes into Mo-DCs. Further, this delayed differentiation of Mo-DCs in MR1−/− mice was responsible for the delayed recruitment of activated CD4+ T cells to the lungs. These findings establish a novel mechanism by which MAIT cells function to promote both innate and adaptive immune responses.
Collapse
Affiliation(s)
- Anda I Meierovics
- Laboratory of Mucosal Pathogens and Cellular Immunology, Division of Bacterial, Parasitic, and Allergenic Products, Center for Biologics Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20993
| | - Siobhán C Cowley
- Laboratory of Mucosal Pathogens and Cellular Immunology, Division of Bacterial, Parasitic, and Allergenic Products, Center for Biologics Evaluation and Research, U.S. Food and Drug Administration, Silver Spring, MD 20993
| |
Collapse
|
25
|
Koay HF, Gherardin NA, Enders A, Loh L, Mackay LK, Almeida CF, Russ BE, Nold-Petry CA, Nold MF, Bedoui S, Chen Z, Corbett AJ, Eckle SBG, Meehan B, d'Udekem Y, Konstantinov IE, Lappas M, Liu L, Goodnow CC, Fairlie DP, Rossjohn J, Chong MM, Kedzierska K, Berzins SP, Belz GT, McCluskey J, Uldrich AP, Godfrey DI, Pellicci DG. A three-stage intrathymic development pathway for the mucosal-associated invariant T cell lineage. Nat Immunol 2016; 17:1300-1311. [PMID: 27668799 DOI: 10.1038/ni.3565] [Citation(s) in RCA: 253] [Impact Index Per Article: 31.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 08/22/2016] [Indexed: 02/08/2023]
Abstract
Mucosal-associated invariant T cells (MAIT cells) detect microbial vitamin B2 derivatives presented by the antigen-presenting molecule MR1. Here we defined three developmental stages and checkpoints for the MAIT cell lineage in humans and mice. Stage 1 and stage 2 MAIT cells predominated in thymus, while stage 3 cells progressively increased in abundance extrathymically. Transition through each checkpoint was regulated by MR1, whereas the final checkpoint that generated mature functional MAIT cells was controlled by multiple factors, including the transcription factor PLZF and microbial colonization. Furthermore, stage 3 MAIT cell populations were expanded in mice deficient in the antigen-presenting molecule CD1d, suggestive of a niche shared by MAIT cells and natural killer T cells (NKT cells). Accordingly, this study maps the developmental pathway and checkpoints that control the generation of functional MAIT cells.
Collapse
Affiliation(s)
- Hui-Fern Koay
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Nicholas A Gherardin
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia.,Cancer Immunology Research Program, Peter MacCallum Cancer Centre, East Melbourne, Australia
| | - Anselm Enders
- John Curtin School of Medical Research, Department of Immunology, Canberra, Australia
| | - Liyen Loh
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Laura K Mackay
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Melbourne, Australia
| | - Catarina F Almeida
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Brendan E Russ
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Claudia A Nold-Petry
- Department of Paediatrics, Monash University, Clayton, Australia.,The Ritchie Centre, Hudson Institute of Medical Research, Clayton, Australia
| | - Marcel F Nold
- Department of Paediatrics, Monash University, Clayton, Australia.,The Ritchie Centre, Hudson Institute of Medical Research, Clayton, Australia
| | - Sammy Bedoui
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Zhenjun Chen
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Alexandra J Corbett
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Sidonia B G Eckle
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Bronwyn Meehan
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Yves d'Udekem
- Royal Children's Hospital, Flemington Road, Parkville, Australia
| | | | - Martha Lappas
- Obstetrics, Nutrition and Endocrinology Group, Department of Obstetrics and Gynaecology, University of Melbourne, Heidelberg, Australia.,Mercy Perinatal Research Centre, Mercy Hospital for Women, Heidelberg, Australia
| | - Ligong Liu
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Queensland, Brisbane, Australia
| | - Chris C Goodnow
- John Curtin School of Medical Research, Department of Immunology, Canberra, Australia
| | - David P Fairlie
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Queensland, Brisbane, Australia
| | - Jamie Rossjohn
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Australia.,Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff, UK.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, Australia
| | - Mark M Chong
- St Vincent's Institute of Medical Research, Fitzroy, Victoria, Australia
| | - Katherine Kedzierska
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Stuart P Berzins
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia.,Collaborative Research Network, Federation University, Ballarat, Australia.,Fiona Elsey Cancer Research Institute, Ballarat, Australia
| | - Gabrielle T Belz
- The Division of Molecular Immunology, Walter and Eliza Hall Institute of Medical Research, Parkville, Australia.,Department of Medical Biology, University of Melbourne, Parkville, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Adam P Uldrich
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Melbourne, Australia
| | - Dale I Godfrey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Melbourne, Australia
| | - Daniel G Pellicci
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia.,Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Melbourne, Australia
| |
Collapse
|
26
|
Vitamin B2 as a virulence factor in Pseudogymnoascus destructans skin infection. Sci Rep 2016; 6:33200. [PMID: 27620349 PMCID: PMC5020413 DOI: 10.1038/srep33200] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 08/22/2016] [Indexed: 12/02/2022] Open
Abstract
Pathogenic and non-pathogenic related microorganisms differ in secondary metabolite production. Here we show that riboflavin overproduction by a fungal pathogen and its hyperaccumulation in affected host tissue exacerbates a skin infection to necrosis. In white-nose syndrome (WNS) skin lesions caused by Pseudogymnoascus destructans, maximum riboflavin concentrations reached up to 815 μg ml−1, indicating bioaccumulation and lack of excretion. We found that high riboflavin concentrations are cytotoxic under conditions specific for hibernation, affect bats’ primary fibroblasts and induce cell detachment, loss of mitochondrial membrane potential, polymerization of cortical actin, and cell necrosis. Our results explain molecular pathology of WNS, where a skin infection becomes fatal. Hyperaccumulation of vitamin B2 coupled with reduced metabolism and low tissue oxygen saturation during hibernation prevents removal of excess riboflavin in infected bats. Upon reperfusion, oxygen reacts with riboflavin resulting in dramatic pathology after arousal. While multiple molecules enable invasive infection, riboflavin-associated extensive necrosis likely contributes to pathophysiology and altered arousal pattern in infected bats. Bioaccumulation of a vitamin under natural infection represents a novel condition in a complex host-pathogen interplay.
Collapse
|
27
|
Khaitan A, Kilberg M, Kravietz A, Ilmet T, Tastan C, Mwamzuka M, Marshed F, Liu M, Ahmed A, Borkowsky W, Unutmaz D. HIV-Infected Children Have Lower Frequencies of CD8+ Mucosal-Associated Invariant T (MAIT) Cells that Correlate with Innate, Th17 and Th22 Cell Subsets. PLoS One 2016; 11:e0161786. [PMID: 27560150 PMCID: PMC4999196 DOI: 10.1371/journal.pone.0161786] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2016] [Accepted: 08/11/2016] [Indexed: 12/16/2022] Open
Abstract
Mucosal-associated invariant T cells (MAIT) are innate T cells restricted by major histocompatibility related molecule 1 (MR1) presenting riboflavin metabolite ligands derived from microbes. Specificity to riboflavin metabolites confers MAIT cells a broad array of host-protective activity against gram-negative and -positive bacteria, mycobacteria, and fungal pathogens. MAIT cells are present at low levels in the peripheral blood of neonates and gradually expand to relatively abundant levels during childhood. Despite no anti-viral activity, MAIT cells are depleted early and irreversibly in HIV infected adults. Such loss or impaired expansion of MAIT cells in HIV-positive children may render them more susceptible to common childhood illnesses and opportunistic infections. In this study we evaluated the frequency of MAIT cells in perinatally HIV-infected children, their response to antiretroviral treatment and their associations with HIV clinical status and related innate and adaptive immune cell subsets with potent antibacterial effector functions. We found HIV+ children between ages 3 to 18 years have significantly decreased CD8+ MAIT cell frequencies compared to uninfected healthy children. Remarkably, CD8 MAIT levels gradually increased with antiretroviral therapy, with greater recovery when treatment is initiated at a young age. Moreover, diminished CD8+ MAIT cell frequencies are associated with low CD4:CD8 ratios and elevated sCD14, suggesting a link with HIV disease progression. Last, CD8+ MAIT cell levels tightly correlate with other antibacterial and mucosa-protective immune subsets, namely, neutrophils, innate-like T cells, and Th17 and Th22 cells. Together these findings suggest that low frequencies of MAIT cells in HIV positive children are part of a concerted disruption to the innate and adaptive immune compartments specialized in sensing and responding to pathogenic or commensal bacteria.
Collapse
Affiliation(s)
- Alka Khaitan
- New York University School of Medicine, Department of Pediatrics, Division of Infectious Diseases and Immunology, New York, NY, United States of America
- * E-mail:
| | - Max Kilberg
- New York University School of Medicine, Department of Pediatrics, Division of Infectious Diseases and Immunology, New York, NY, United States of America
| | - Adam Kravietz
- New York University, Department of Microbiology, New York, NY, United States of America
| | - Tiina Ilmet
- New York University School of Medicine, Department of Pediatrics, Division of Infectious Diseases and Immunology, New York, NY, United States of America
| | - Cihan Tastan
- New York University, Department of Microbiology, New York, NY, United States of America
- The Jackson Laboratory for Genomic Medicine, Farmington, CT, United States of America
| | | | | | - Mengling Liu
- New York University, Division of Biostatistics, Department of Population Health, Department of Environmental Medicine, New York, NY, United States of America
| | | | - William Borkowsky
- New York University School of Medicine, Department of Pediatrics, Division of Infectious Diseases and Immunology, New York, NY, United States of America
| | - Derya Unutmaz
- New York University, Department of Microbiology, New York, NY, United States of America
- The Jackson Laboratory for Genomic Medicine, Farmington, CT, United States of America
| |
Collapse
|
28
|
Liuzzi AR, Kift-Morgan A, Lopez-Anton M, Friberg IM, Zhang J, Brook AC, Roberts GW, Donovan KL, Colmont CS, Toleman MA, Bowen T, Johnson DW, Topley N, Moser B, Fraser DJ, Eberl M. Unconventional Human T Cells Accumulate at the Site of Infection in Response to Microbial Ligands and Induce Local Tissue Remodeling. THE JOURNAL OF IMMUNOLOGY 2016; 197:2195-207. [PMID: 27527598 PMCID: PMC5009878 DOI: 10.4049/jimmunol.1600990] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 07/12/2016] [Indexed: 12/13/2022]
Abstract
The antimicrobial responsiveness and function of unconventional human T cells are poorly understood, with only limited access to relevant specimens from sites of infection. Peritonitis is a common and serious complication in individuals with end-stage kidney disease receiving peritoneal dialysis. By analyzing local and systemic immune responses in peritoneal dialysis patients presenting with acute bacterial peritonitis and monitoring individuals before and during defined infectious episodes, our data show that Vγ9/Vδ2+ γδ T cells and mucosal-associated invariant T cells accumulate at the site of infection with organisms producing (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate and vitamin B2, respectively. Such unconventional human T cells are major producers of IFN-γ and TNF-α in response to these ligands that are shared by many microbial pathogens and affect the cells lining the peritoneal cavity by triggering local inflammation and inducing tissue remodeling with consequences for peritoneal membrane integrity. Our data uncover a crucial role for Vγ9/Vδ2 T cells and mucosal-associated invariant T cells in bacterial infection and suggest that they represent a useful predictive marker for important clinical outcomes, which may inform future stratification and patient management. These findings are likely to be applicable to other acute infections where local activation of unconventional T cells contributes to the antimicrobial inflammatory response.
Collapse
Affiliation(s)
- Anna Rita Liuzzi
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Ann Kift-Morgan
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Melisa Lopez-Anton
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom; Wales Kidney Research Unit, Heath Park Campus, Cardiff CF14 4XN, United Kingdom
| | - Ida M Friberg
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Jingjing Zhang
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Amy C Brook
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Gareth W Roberts
- Wales Kidney Research Unit, Heath Park Campus, Cardiff CF14 4XN, United Kingdom; Directorate of Nephrology and Transplantation, Cardiff and Vale University Health Board, University Hospital of Wales, Cardiff CF14 4XW, United Kingdom
| | - Kieron L Donovan
- Wales Kidney Research Unit, Heath Park Campus, Cardiff CF14 4XN, United Kingdom; Directorate of Nephrology and Transplantation, Cardiff and Vale University Health Board, University Hospital of Wales, Cardiff CF14 4XW, United Kingdom
| | - Chantal S Colmont
- Wales Kidney Research Unit, Heath Park Campus, Cardiff CF14 4XN, United Kingdom
| | - Mark A Toleman
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Timothy Bowen
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom; Wales Kidney Research Unit, Heath Park Campus, Cardiff CF14 4XN, United Kingdom
| | - David W Johnson
- Department of Renal Medicine, University of Queensland at Princess Alexandra Hospital, Brisbane, Queensland 4102, Australia; Centre for Kidney Disease Research, Translational Research Institute, Brisbane, Queensland 4102, Australia; Australia and New Zealand Dialysis and Transplant Registry, Adelaide, South Australia 5001, Australia
| | - Nicholas Topley
- Centre for Medical Education, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom; and Systems Immunity Research Institute, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Bernhard Moser
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom; Systems Immunity Research Institute, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Donald J Fraser
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom; Wales Kidney Research Unit, Heath Park Campus, Cardiff CF14 4XN, United Kingdom; Directorate of Nephrology and Transplantation, Cardiff and Vale University Health Board, University Hospital of Wales, Cardiff CF14 4XW, United Kingdom; Systems Immunity Research Institute, Cardiff University, Cardiff CF14 4XN, United Kingdom
| | - Matthias Eberl
- Division of Infection and Immunity, School of Medicine, Cardiff University, Cardiff CF14 4XN, United Kingdom; Systems Immunity Research Institute, Cardiff University, Cardiff CF14 4XN, United Kingdom
| |
Collapse
|
29
|
Schrager LK, Izzo A, Velmurugan K. Immunopathogenesis of tuberculosis and novel mechanisms of vaccine activity. Tuberculosis (Edinb) 2016; 99 Suppl 1:S3-7. [DOI: 10.1016/j.tube.2016.05.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
30
|
Laugel B, Lloyd A, Meermeier EW, Crowther MD, Connor TR, Dolton G, Miles JJ, Burrows SR, Gold MC, Lewinsohn DM, Sewell AK. Engineering of Isogenic Cells Deficient for MR1 with a CRISPR/Cas9 Lentiviral System: Tools To Study Microbial Antigen Processing and Presentation to Human MR1-Restricted T Cells. THE JOURNAL OF IMMUNOLOGY 2016; 197:971-82. [PMID: 27307560 PMCID: PMC4947828 DOI: 10.4049/jimmunol.1501402] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Accepted: 05/18/2016] [Indexed: 01/11/2023]
Abstract
The nonclassical HLA molecule MHC-related protein 1 (MR1) presents metabolites of the vitamin B synthesis pathways to mucosal-associated invariant T (MAIT) cells and other MR1-restricted T cells. This new class of Ags represents a variation on the classical paradigm of self/non-self discrimination because these T cells are activated through their TCR by small organic compounds generated during microbial vitamin B2 synthesis. Beyond the fundamental significance, the invariant nature of MR1 across the human population is a tantalizing feature for the potential development of universal immune therapeutic and diagnostic tools. However, many aspects of MR1 Ag presentation and MR1-restricted T cell biology remain unknown, and the ubiquitous expression of MR1 across tissues and cell lines can be a confounding factor for experimental purposes. In this study, we report the development of a novel CRISPR/Cas9 genome editing lentiviral system and its use to efficiently disrupt MR1 expression in A459, THP-1, and K562 cell lines. We generated isogenic MR1(-/-) clonal derivatives of the A549 lung carcinoma and THP-1 monocytic cell lines and used these to study T cell responses to intracellular pathogens. We confirmed that MAIT cell clones were unable to respond to MR1(-/-) clones infected with bacteria whereas Ag presentation by classical and other nonclassical HLAs was unaffected. This system represents a robust and efficient method to disrupt the expression of MR1 and should facilitate investigations into the processing and presentation of MR1 Ags as well as into the biology of MAIT cells.
Collapse
Affiliation(s)
- Bruno Laugel
- Division of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, United Kingdom;
| | - Angharad Lloyd
- Division of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, United Kingdom
| | - Erin W Meermeier
- Department of Pulmonary and Critical Care Medicine, Oregon Health and Science University, Portland, OR 97239
| | - Michael D Crowther
- Division of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, United Kingdom
| | - Thomas R Connor
- Cardiff School of Biosciences, Cardiff University, Cardiff CF10 3AX, United Kingdom; and
| | - Garry Dolton
- Division of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, United Kingdom
| | - John J Miles
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland 4006, Australia
| | - Scott R Burrows
- QIMR Berghofer Medical Research Institute, Brisbane, Queensland 4006, Australia
| | - Marielle C Gold
- Department of Pulmonary and Critical Care Medicine, Oregon Health and Science University, Portland, OR 97239
| | - David M Lewinsohn
- Cardiff School of Biosciences, Cardiff University, Cardiff CF10 3AX, United Kingdom; and
| | - Andrew K Sewell
- Division of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, United Kingdom;
| |
Collapse
|
31
|
Affiliation(s)
- David A. Rhodes
- Department of Pathology, Immunology Division, University of Cambridge, Cambridge Institute for Medical Research, Cambridge CB2 0XY, United Kingdom; ,
| | - Walter Reith
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, CH-1211 Geneva 4, Switzerland;
| | - John Trowsdale
- Department of Pathology, Immunology Division, University of Cambridge, Cambridge Institute for Medical Research, Cambridge CB2 0XY, United Kingdom; ,
| |
Collapse
|
32
|
Gao Y, Rae W, Ramakrishnan KA, Barcenas-Morales G, Döffinger R, Eren E, Faust SN, Ottensmeier CH, Williams AP. Mucosal-Associated Invariant T (MAIT) Cells Are Impaired in Th17 Associated Primary and Secondary Immunodeficiencies. PLoS One 2016; 11:e0155059. [PMID: 27167980 PMCID: PMC4864289 DOI: 10.1371/journal.pone.0155059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 04/23/2016] [Indexed: 11/27/2022] Open
Abstract
The recently described Mucosal Associated Invariant T (MAIT) cells mediate specific recognition of bacterial and fungal vitamin B2 metabolites. As innate T cells, they possess broad effector responses, including IFN- including Iproduction, that are comparable to conventional T cell responses. Immunodeficiencies associated with systemic Th17 deficiency may also be compounded by defects in MAIT immunity. We evaluated Th17 immunity in this innate T cell compartment in primary (AD-HIES) and secondary immunodeficiency (thymoma) patients with conventional Th17 deficiency and susceptibility to fungal and bacterial disease. Our results suggest that MAIT cells are both reduced and functional deficient in STAT3 deficiency and thymoma patients with IL-12/23 autoantibodies. In contrast, thymoma patients without autoantibodies preserved the normal number and functional MAIT cells.
Collapse
Affiliation(s)
- Yifang Gao
- Academic Unit of Cancer Sciences, Faculty of Medicine, University of Southampton and Southampton NIHR Experimental Cancer Medicine Centre, Southampton, United Kingdom
| | - William Rae
- Department of Clinical Immunology, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - Keseva Ananth Ramakrishnan
- Academic Unit of Cancer Sciences, Faculty of Medicine, University of Southampton and Southampton NIHR Experimental Cancer Medicine Centre, Southampton, United Kingdom
| | | | - Rainer Döffinger
- Department of Clinical Immunology, Addenbrookes Hospital, Cambridge, United Kingdom
| | - Efrem Eren
- Department of Clinical Immunology, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - Saul N. Faust
- NIHR Wellcome Trust Clinical Research Facility, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - Christian H. Ottensmeier
- Academic Unit of Cancer Sciences, Faculty of Medicine, University of Southampton and Southampton NIHR Experimental Cancer Medicine Centre, Southampton, United Kingdom
| | - Anthony P. Williams
- Academic Unit of Cancer Sciences, Faculty of Medicine, University of Southampton and Southampton NIHR Experimental Cancer Medicine Centre, Southampton, United Kingdom
- Department of Clinical Immunology, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| |
Collapse
|
33
|
Mucosa-Associated Invariant T Cells Are Systemically Depleted in Simian Immunodeficiency Virus-Infected Rhesus Macaques. J Virol 2016; 90:4520-4529. [PMID: 26912615 DOI: 10.1128/jvi.02876-15] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 02/14/2016] [Indexed: 01/25/2023] Open
Abstract
UNLABELLED Mucosa-associated invariant T (MAIT) cells contribute to host immune protection against a wide range of potential pathogens via the recognition of bacterial metabolites presented by the major histocompatibility complex class I-related molecule MR1. Although bacterial products translocate systemically in human immunodeficiency virus (HIV)-infected individuals and simian immunodeficiency virus (SIV)-infected Asian macaques, several studies have shown that MAIT cell frequencies actually decrease in peripheral blood during the course of HIV/SIV disease. However, the mechanisms underlying this proportional decline remain unclear. In this study, we characterized the phenotype, activation status, functionality, distribution, and clonotypic structure of MAIT cell populations in the peripheral blood, liver, mesenteric lymph nodes (MLNs), jejunum, and bronchoalveolar lavage (BAL) fluid of healthy and SIV-infected rhesus macaques (RMs). Low frequencies of MAIT cells were observed in the peripheral blood, MLNs, and BAL fluid of SIV-infected RMs. These numerical changes were coupled with increased proliferation and a highly public T cell receptor alpha (TCRα) repertoire in the MAIT cell compartment without redistribution to other anatomical sites. Collectively, our data show systemically decreased frequencies of MAIT cells likely attributable to enhanced turnover in SIV-infected RMs. This process may impair protective immunity against certain opportunistic infections with progression to AIDS. IMPORTANCE The data presented in this study reveal for the first time that MAIT cells are systemically depleted in an AIDS virus infection. These findings provide a new mechanistic link with our current understanding of HIV/SIV pathogenesis and implicate MAIT cell depletion in the disease process.
Collapse
|
34
|
McWilliam HEG, Eckle SBG, Theodossis A, Liu L, Chen Z, Wubben JM, Fairlie DP, Strugnell RA, Mintern JD, McCluskey J, Rossjohn J, Villadangos JA. The intracellular pathway for the presentation of vitamin B-related antigens by the antigen-presenting molecule MR1. Nat Immunol 2016; 17:531-7. [PMID: 27043408 DOI: 10.1038/ni.3416] [Citation(s) in RCA: 119] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Accepted: 02/18/2016] [Indexed: 02/08/2023]
Abstract
The antigen-presenting molecule MR1 presents vitamin B-related antigens (VitB antigens) to mucosal-associated invariant T (MAIT) cells through an uncharacterized pathway. We show that MR1, unlike other antigen-presenting molecules, does not constitutively present self-ligands. In the steady state it accumulates in a ligand-receptive conformation within the endoplasmic reticulum. VitB antigens reach this location and form a Schiff base with MR1, triggering a 'molecular switch' that allows MR1-VitB antigen complexes to traffic to the plasma membrane. These complexes are endocytosed with kinetics independent of the affinity of the MR1-ligand interaction and are degraded intracellularly, although some MR1 molecules acquire new ligands during passage through endosomes and recycle back to the surface. MR1 antigen presentation is characterized by a rapid 'off-on-off' mechanism that is strictly dependent on antigen availability.
Collapse
Affiliation(s)
- Hamish E G McWilliam
- Department of Microbiology and Immunology, University of Melbourne, Peter Doherty Institute for Infection and Immunity, Victoria, Australia.,Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia.,Australian Research Council (ARC) Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
| | - Sidonia B G Eckle
- Department of Microbiology and Immunology, University of Melbourne, Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | - Alex Theodossis
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Ligong Liu
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia.,ARC Centre of Excellence in Advanced Molecular Imaging, The University of Queensland, Brisbane, Queensland, Australia
| | - Zhenjun Chen
- Department of Microbiology and Immunology, University of Melbourne, Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | - Jacinta M Wubben
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia.,Australian Research Council (ARC) Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia
| | - David P Fairlie
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia.,ARC Centre of Excellence in Advanced Molecular Imaging, The University of Queensland, Brisbane, Queensland, Australia
| | - Richard A Strugnell
- Department of Microbiology and Immunology, University of Melbourne, Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | - Justine D Mintern
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, University of Melbourne, Peter Doherty Institute for Infection and Immunity, Victoria, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia.,Australian Research Council (ARC) Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia.,Institute of Infection and Immunity, Cardiff University School of Medicine, Cardiff, UK
| | - Jose A Villadangos
- Department of Microbiology and Immunology, University of Melbourne, Peter Doherty Institute for Infection and Immunity, Victoria, Australia.,Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, Victoria, Australia
| |
Collapse
|
35
|
Zabijak L, Attencourt C, Guignant C, Chatelain D, Marcelo P, Marolleau JP, Treiner E. Increased tumor infiltration by mucosal-associated invariant T cells correlates with poor survival in colorectal cancer patients. Cancer Immunol Immunother 2015; 64:1601-8. [PMID: 26497850 PMCID: PMC11028701 DOI: 10.1007/s00262-015-1764-7] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 10/03/2015] [Indexed: 12/22/2022]
Abstract
The infiltration of tumors by lymphocytes is a prognosis factor in colorectal cancer (CRC). The magnitude and quality of this infiltration have emerged as important component of the clinical outcome in these patients. Specifically, markers associated with functional cell-mediated immunity, i.e., a Th1 immune response, are independent markers of better prognosis, whereas Th17-associated components are deleterious and correlate with poorer survival. Mucosal-associated invariant T (MAIT) cells are a recently described T cell subset with tissue-homing properties. They display a restricted TCR repertoire specific for widely conserved microbial ligands, and display anti-bacterial properties upon release of Th1-like, Th17-like, and/or cytotoxic granules. MAIT-cell-specific transcripts have been found in kidney and brain cancer, but have not been studies in other sites. In this study, we retrospectively analyzed by confocal microscopy the presence of MAIT cells within colorectal tumors as compared with paired healthy tissues. We observed a significant although variable increase, both in density and in proportion of overall tumor-infiltrating T lymphocytes inside the tumors. Importantly, survival curves as well as multivariate analysis showed that patients displaying a higher recruitment of MAIT cells in their tumor, as compared with the neighboring healthy tissue, showed a less favorable clinical outcome. This study suggests that including MAIT-cell-specific markers or transcripts in the analysis of tumor-infiltrating lymphocytes could be a benefit to the diagnosis and follow-up of CRC patients.
Collapse
Affiliation(s)
- Luciane Zabijak
- EA4666, University of Picardie-Jules Verne, Amiens, France
- ICAP Platform, University of Picardie-Jules Verne, Amiens, France
| | | | - Caroline Guignant
- EA4666, University of Picardie-Jules Verne, Amiens, France
- Immunology Laboratory, CHU Amiens, Amiens, France
| | | | - Paulo Marcelo
- ICAP Platform, University of Picardie-Jules Verne, Amiens, France
| | - Jean-Pierre Marolleau
- EA4666, University of Picardie-Jules Verne, Amiens, France
- Hematology Department, CHU Amiens, Amiens, France
| | - Emmanuel Treiner
- EA4666, University of Picardie-Jules Verne, Amiens, France.
- Immunology Laboratory, CHU Amiens, Amiens, France.
- Inserm UMR1043, CHU Purpan, BP 3028, 31024, Toulouse Cedex 03, France.
| |
Collapse
|
36
|
Eckle SBG, Corbett AJ, Keller AN, Chen Z, Godfrey DI, Liu L, Mak JYW, Fairlie DP, Rossjohn J, McCluskey J. Recognition of Vitamin B Precursors and Byproducts by Mucosal Associated Invariant T Cells. J Biol Chem 2015; 290:30204-11. [PMID: 26468291 DOI: 10.1074/jbc.r115.685990] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Vitamin B2 (riboflavin) is essential for metabolic functions and is synthesized by many bacteria, yeast, and plants, but not by mammals and other animals, which must acquire it from the diet. In mammals, modified pyrimidine intermediates from the microbial biosynthesis of riboflavin are recognized as signature biomarkers of microbial infection. This recognition occurs by specialized lymphocytes known as mucosal associated invariant T (MAIT) cells. The major histocompatibility class I-like antigen-presenting molecule, MR1, captures these pyrimidine intermediates, but only after their condensation with small molecules derived from glycolysis and other metabolic pathways to form short-lived antigens. The resulting MR1-Ag complexes are recognized by MAIT cell antigen receptors (αβ T cell receptors (TCRs)), and the subsequent MAIT cell immune responses are thought to protect the host from pathogens at mucosal surfaces. Here, we review our understanding of how these novel antigens are generated and discuss their interactions with MR1 and MAIT TCRs.
Collapse
Affiliation(s)
- Sidonia B G Eckle
- From the Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, and
| | - Alexandra J Corbett
- From the Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, and
| | - Andrew N Keller
- the Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia
| | - Zhenjun Chen
- From the Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, and
| | - Dale I Godfrey
- From the Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Ligong Liu
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Queensland, Brisbane, Queensland 4072, Australia, and the Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, and
| | - Jeffrey Y W Mak
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Queensland, Brisbane, Queensland 4072, Australia, and the Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, and
| | - David P Fairlie
- Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Queensland, Brisbane, Queensland 4072, Australia, and the Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, and
| | - Jamie Rossjohn
- the Infection and Immunity Program and Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, and Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia, the Institute of Infection and Immunity, Cardiff University School of Medicine, Heath Park, Cardiff CF14 4XN, United Kingdom
| | - James McCluskey
- From the Department of Microbiology and Immunology, The Peter Doherty Institute for Infection and Immunity, and
| |
Collapse
|
37
|
Dumitriu IE. The life (and death) of CD4+ CD28(null) T cells in inflammatory diseases. Immunology 2015; 146:185-93. [PMID: 26190355 DOI: 10.1111/imm.12506] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 07/09/2015] [Accepted: 07/10/2015] [Indexed: 02/06/2023] Open
Abstract
Inflammation contributes to the development and perpetuation of several disorders and T lymphocytes orchestrate the inflammatory immune response. Although the role of T cells in inflammation is widely recognized, specific therapies that tackle inflammatory networks in disease are yet to be developed. CD4(+) CD28(null) T cells are a unique subset of helper T lymphocytes that recently shot back into the limelight as potential catalysts of inflammation in several inflammatory disorders such as autoimmunity, atherosclerosis and chronic viral infections. In contrast to conventional helper T cells, CD4(+) CD28(null) T cells have an inbuilt ability to release inflammatory cytokines and cytotoxic molecules that can damage tissues and amplify inflammatory pathways. It comes as no surprise that patients who have high numbers of these cells have more severe disease and poor prognosis. In this review, I provide an overview on the latest advances in the biology of CD4(+) CD28(null) T cells. Understanding the complex functions and dynamics of CD4(+) CD28(null) T cells may open new avenues for therapeutic intervention to prevent progression of inflammatory diseases.
Collapse
Affiliation(s)
- Ingrid E Dumitriu
- Cardiovascular and Cell Sciences Research Institute, St George's, University of London, London, UK
| |
Collapse
|
38
|
Szabo PA, Anantha RV, Shaler CR, McCormick JK, Haeryfar SMM. CD1d- and MR1-Restricted T Cells in Sepsis. Front Immunol 2015; 6:401. [PMID: 26322041 PMCID: PMC4533011 DOI: 10.3389/fimmu.2015.00401] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 07/22/2015] [Indexed: 12/23/2022] Open
Abstract
Dysregulated immune responses to infection, such as those encountered in sepsis, can be catastrophic. Sepsis is typically triggered by an overwhelming systemic response to an infectious agent(s) and is associated with high morbidity and mortality even under optimal critical care. Recent studies have implicated unconventional, innate-like T lymphocytes, including CD1d- and MR1-restricted T cells as effectors and/or regulators of inflammatory responses during sepsis. These cell types are typified by invariant natural killer T (iNKT) cells, variant NKT (vNKT) cells, and mucosa-associated invariant T (MAIT) cells. iNKT and vNKT cells are CD1d-restricted, lipid-reactive cells with remarkable immunoregulatory properties. MAIT cells participate in antimicrobial defense, and are restricted by major histocompatibility complex-related protein 1 (MR1), which displays microbe-derived vitamin B metabolites. Importantly, NKT and MAIT cells are rapid and potent producers of immunomodulatory cytokines. Therefore, they may be considered attractive targets during the early hyperinflammatory phase of sepsis when immediate interventions are urgently needed, and also in later phases when adjuvant immunotherapies could potentially reverse the dangerous state of immunosuppression. We will highlight recent findings that point to the significance or the therapeutic potentials of NKT and MAIT cells in sepsis and will also discuss what lies ahead in research in this area.
Collapse
Affiliation(s)
- Peter A Szabo
- Department of Microbiology and Immunology, Western University , London, ON , Canada
| | - Ram V Anantha
- Department of Microbiology and Immunology, Western University , London, ON , Canada ; Division of General Surgery, Department of Medicine, Western University , London, ON , Canada
| | - Christopher R Shaler
- Department of Microbiology and Immunology, Western University , London, ON , Canada
| | - John K McCormick
- Department of Microbiology and Immunology, Western University , London, ON , Canada ; Centre for Human Immunology, Western University , London, ON , Canada ; Lawson Health Research Institute , London, ON , Canada
| | - S M Mansour Haeryfar
- Department of Microbiology and Immunology, Western University , London, ON , Canada ; Centre for Human Immunology, Western University , London, ON , Canada ; Lawson Health Research Institute , London, ON , Canada ; Division of Clinical Immunology and Allergy, Department of Medicine, Western University , London, ON , Canada
| |
Collapse
|
39
|
Macho-Fernandez E, Brigl M. The Extended Family of CD1d-Restricted NKT Cells: Sifting through a Mixed Bag of TCRs, Antigens, and Functions. Front Immunol 2015; 6:362. [PMID: 26284062 PMCID: PMC4517383 DOI: 10.3389/fimmu.2015.00362] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Accepted: 07/04/2015] [Indexed: 01/21/2023] Open
Abstract
Natural killer T (NKT) cells comprise a family of specialized T cells that recognize lipid antigens presented by CD1d. Based on their T cell receptor (TCR) usage and antigen specificities, CD1d-restricted NKT cells have been divided into two main subsets: type I NKT cells that use a canonical invariant TCR α-chain and recognize α-galactosylceramide (α-GalCer), and type II NKT cells that use a more diverse αβ TCR repertoire and do not recognize α-GalCer. In addition, α-GalCer-reactive NKT cells that use non-canonical αβ TCRs and CD1d-restricted T cells that use γδ or δ/αβ TCRs have recently been identified, revealing further diversity among CD1d-restricted T cells. Importantly, in addition to their distinct antigen specificities, functional differences are beginning to emerge between the different members of the CD1d-restricted T cell family. In this review, while using type I NKT cells as comparison, we will focus on type II NKT cells and the other non-invariant CD1d-restricted T cell subsets, and discuss our current understanding of the antigens they recognize, the formation of stimulatory CD1d/antigen complexes, the modes of TCR-mediated antigen recognition, and the mechanisms and consequences of their activation that underlie their function in antimicrobial responses, anti-tumor immunity, and autoimmunity.
Collapse
Affiliation(s)
- Elodie Macho-Fernandez
- Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Manfred Brigl
- Department of Pathology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| |
Collapse
|
40
|
Sakala IG, Kjer-Nielsen L, Eickhoff CS, Wang X, Blazevic A, Liu L, Fairlie DP, Rossjohn J, McCluskey J, Fremont DH, Hansen TH, Hoft DF. Functional Heterogeneity and Antimycobacterial Effects of Mouse Mucosal-Associated Invariant T Cells Specific for Riboflavin Metabolites. THE JOURNAL OF IMMUNOLOGY 2015; 195:587-601. [PMID: 26063000 DOI: 10.4049/jimmunol.1402545] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 05/13/2015] [Indexed: 12/15/2022]
Abstract
Mucosal-associated invariant T (MAIT) cells have a semi-invariant TCR Vα-chain, and their optimal development is dependent upon commensal flora and expression of the nonpolymorphic MHC class I-like molecule MR1. MAIT cells are activated in an MR1-restricted manner by diverse strains of bacteria and yeast, suggesting a widely shared Ag. Recently, human and mouse MR1 were found to bind bacterial riboflavin metabolites (ribityllumazine [RL] Ags) capable of activating MAIT cells. In this study, we used MR1/RL tetramers to study MR1 dependency, subset heterogeneity, and protective effector functions important for tuberculosis immunity. Although tetramer(+) cells were detected in both MR1(+/+) and MR1(-/-) TCR Vα19i-transgenic (Tg) mice, MR1 expression resulted in significantly increased tetramer(+) cells coexpressing TCR Vβ6/8, NK1.1, CD44, and CD69 that displayed more robust in vitro responses to IL-12 plus IL-18 and RL Ag, indicating that MR1 is necessary for the optimal development of the classic murine MAIT cell memory/effector subset. In addition, tetramer(+) MAIT cells expressing CD4, CD8, or neither developing in MR1(+/+) Vα19i-Tg mice had disparate cytokine profiles in response to RL Ag. Therefore, murine MAIT cells are considerably more heterogeneous than previously thought. Most notably, after mycobacterial pulmonary infection, heterogeneous subsets of tetramer(+) Vα19i-Tg MAIT cells expressing CXCR3 and α4β1 were recruited into the lungs and afforded early protection. In addition, Vα19iCα(-/-)MR(+/+) mice were significantly better protected than were Vα19iCα(-/-)MR1(-/-), wild-type, and MR1(-/-) non-Tg mice. Overall, we demonstrate considerable functional diversity of MAIT cell responses, as well as that MR1-restricted MAIT cells are important for tuberculosis protective immunity.
Collapse
Affiliation(s)
- Isaac G Sakala
- Division of Infectious Diseases, Allergy, and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis, MO 63104; Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO 63110;
| | - Lars Kjer-Nielsen
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Christopher S Eickhoff
- Division of Infectious Diseases, Allergy, and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis, MO 63104
| | - Xiaoli Wang
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO 63110
| | - Azra Blazevic
- Division of Infectious Diseases, Allergy, and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis, MO 63104
| | - Ligong Liu
- Division of Chemistry and Structural Biology, Institute of Molecular Bioscience, University of Queensland, Brisbane, Queensland 4072, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of Queensland, Brisbane, Queensland 4072, Australia
| | - David P Fairlie
- Division of Chemistry and Structural Biology, Institute of Molecular Bioscience, University of Queensland, Brisbane, Queensland 4072, Australia; Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of Queensland, Brisbane, Queensland 4072, Australia
| | - Jamie Rossjohn
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Melbourne, Victoria 3800 Australia; Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, United Kingdom; Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia; and
| | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Daved H Fremont
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO 63110
| | - Ted H Hansen
- Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO 63110;
| | - Daniel F Hoft
- Division of Infectious Diseases, Allergy, and Immunology, Department of Internal Medicine, Saint Louis University School of Medicine, Saint Louis, MO 63104; Department of Microbiology and Immunology, Edward A. Doisy Research Center, Saint Louis University School of Medicine, Saint Louis, MO 63104
| |
Collapse
|
41
|
Carolan E, Tobin LM, Mangan BA, Corrigan M, Gaoatswe G, Byrne G, Geoghegan J, Cody D, O'Connell J, Winter DC, Doherty DG, Lynch L, O'Shea D, Hogan AE. Altered distribution and increased IL-17 production by mucosal-associated invariant T cells in adult and childhood obesity. THE JOURNAL OF IMMUNOLOGY 2015; 194:5775-80. [PMID: 25980010 DOI: 10.4049/jimmunol.1402945] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 04/19/2015] [Indexed: 12/15/2022]
Abstract
Mucosal-associated invariant T (MAIT) cells are innate MHC-unrestricted cells that regulate inflammatory responses through the rapid production of cytokines. In this article, we show that circulating MAIT cells are depleted in obese adults, and depletion is associated with diabetic status. Circulating MAIT cells more frequently produced IL-17 upon stimulation ex vivo, a cytokine implicated in insulin resistance. MAIT cells were enriched in adipose tissue (AT) compared with blood. AT MAIT cells, but not circulating MAIT cells, were capable of producing IL-10. In AT from obese subjects, MAIT cells were depleted, were less likely to produce IL-10, and more frequently produced IL-17. Finally, we show that IL-17(+) MAIT cells are also increased in childhood obesity, and altered MAIT cell frequencies in obese children are positively associated with insulin resistance. These data indicate that MAIT cells are enriched in human AT and display an IL-17(+) phenotype in both obese adults and children, correlating with levels of insulin resistance. The alterations in MAIT cells may be contributing to obesity-related sterile inflammation and insulin resistance.
Collapse
Affiliation(s)
- Eirin Carolan
- Obesity Immunology Research, St Vincent's University Hospital and University College Dublin, Dublin 4, Ireland; National Children's Research Centre, Crumlin Children's Hospital, Dublin 12, Ireland
| | - Laura M Tobin
- Obesity Immunology Research, St Vincent's University Hospital and University College Dublin, Dublin 4, Ireland
| | - Bozgana A Mangan
- Discipline of Immunology, School of Medicine, Trinity College Dublin, Dublin 8, Ireland
| | - Michelle Corrigan
- Obesity Immunology Research, St Vincent's University Hospital and University College Dublin, Dublin 4, Ireland
| | - Gadinthsware Gaoatswe
- Obesity Immunology Research, St Vincent's University Hospital and University College Dublin, Dublin 4, Ireland
| | - Greg Byrne
- School of Biological Sciences, Dublin Institute of Technology, Dublin 2, Ireland
| | - Justin Geoghegan
- Obesity Immunology Research, St Vincent's University Hospital and University College Dublin, Dublin 4, Ireland
| | - Declan Cody
- Department of Endocrinology, Our Ladies Children's Hospital Crumlin, Dublin 12, Ireland; and
| | - Jean O'Connell
- Obesity Immunology Research, St Vincent's University Hospital and University College Dublin, Dublin 4, Ireland
| | - Desmond C Winter
- Obesity Immunology Research, St Vincent's University Hospital and University College Dublin, Dublin 4, Ireland
| | - Derek G Doherty
- Discipline of Immunology, School of Medicine, Trinity College Dublin, Dublin 8, Ireland
| | - Lydia Lynch
- Rheumatology, Allergy and Immunology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Donal O'Shea
- Obesity Immunology Research, St Vincent's University Hospital and University College Dublin, Dublin 4, Ireland
| | - Andrew E Hogan
- Obesity Immunology Research, St Vincent's University Hospital and University College Dublin, Dublin 4, Ireland; National Children's Research Centre, Crumlin Children's Hospital, Dublin 12, Ireland;
| |
Collapse
|
42
|
Wilson RP, Ives ML, Rao G, Lau A, Payne K, Kobayashi M, Arkwright PD, Peake J, Wong M, Adelstein S, Smart JM, French MA, Fulcher DA, Picard C, Bustamante J, Boisson-Dupuis S, Gray P, Stepensky P, Warnatz K, Freeman AF, Rossjohn J, McCluskey J, Holland SM, Casanova JL, Uzel G, Ma CS, Tangye SG, Deenick EK. STAT3 is a critical cell-intrinsic regulator of human unconventional T cell numbers and function. ACTA ACUST UNITED AC 2015; 212:855-64. [PMID: 25941256 PMCID: PMC4451129 DOI: 10.1084/jem.20141992] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 04/20/2015] [Indexed: 01/11/2023]
Abstract
Wilson et al. show that individuals with loss-of-function mutations in STAT3 have reduced numbers of peripheral blood MAIT and NKT cells, but not γδ T cells. Residual MAIT cells had normal expression of RORγt, but displayed impaired secretion of IL-17A and IL-17F. Unconventional T cells such as γδ T cells, natural killer T cells (NKT cells) and mucosal-associated invariant T cells (MAIT cells) are a major component of the immune system; however, the cytokine signaling pathways that control their development and function in humans are unknown. Primary immunodeficiencies caused by single gene mutations provide a unique opportunity to investigate the role of specific molecules in regulating human lymphocyte development and function. We found that individuals with loss-of-function mutations in STAT3 had reduced numbers of peripheral blood MAIT and NKT but not γδ T cells. Analysis of STAT3 mosaic individuals revealed that this effect was cell intrinsic. Surprisingly, the residual STAT3-deficient MAIT cells expressed normal levels of the transcription factor RORγt. Despite this, they displayed a deficiency in secretion of IL-17A and IL-17F, but were able to secrete normal levels of cytokines such as IFNγ and TNF. The deficiency in MAIT and NKT cells in STAT3-deficient patients was mirrored by loss-of-function mutations in IL12RB1 and IL21R, respectively. Thus, these results reveal for the first time the essential role of STAT3 signaling downstream of IL-23R and IL-21R in controlling human MAIT and NKT cell numbers.
Collapse
Affiliation(s)
- Robert P Wilson
- University of Bath, Bath BA2 7AY, England, UK Immunology Division, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia
| | - Megan L Ives
- Immunology Division, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia St. Vincent's Clinical School and School of Women's and Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Geetha Rao
- Immunology Division, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia
| | - Anthony Lau
- University of Bath, Bath BA2 7AY, England, UK Immunology Division, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia
| | - Kathryn Payne
- Immunology Division, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia
| | - Masao Kobayashi
- Department of Pediatrics, Hiroshima University Graduate School of Biomedical and Health Sciences, Hiroshima, Japan 739-8511
| | - Peter D Arkwright
- University of Manchester, Royal Manchester Children's Hospital, Manchester M13 9WL, England, UK
| | - Jane Peake
- Department of Paediatrics and Child Health, Royal Children's Hospital Brisbane, Brisbane, QLD 4006, Australia
| | - Melanie Wong
- Department of Allergy and Immunology, Children's Hospital at Westmead, Westmead, Sydney, NSW 2145, Australia
| | - Stephen Adelstein
- Department of Clinical Immunology, Royal Prince Alfred Hospital, Camperdown, Sydney, NSW 2050, Australia
| | - Joanne M Smart
- Department of Allergy and Immunology, Royal Children's Hospital Melbourne, Parkville, VIC 3052, Australia
| | - Martyn A French
- Department of Clinical Immunology, Royal Perth Hospital, Perth, WA 6000, Australia School of Pathology and Laboratory Medicine, University of Western Australia, Crawley, WA 6009, Australia
| | - David A Fulcher
- Department of Immunology, Institute of Clinical Pathology and Medical Research, Westmead Hospital, Westmead, Sydney, NSW 2006, Australia
| | - Capucine Picard
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, French Institute of Health and Medical Research (INSERM) U1163 and Pediatric Hematology and Immunology Unit, Necker Hospital for Sick Children, 75015 Paris, France Study Center for Primary Immunodeficiencies, Assistance Publique-Hôpitaux de Paris (AP-HP), Necker Hospital, 75015 Paris, France Imagine Institute, Paris Descartes University, 75015 Paris, France
| | - Jacinta Bustamante
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, French Institute of Health and Medical Research (INSERM) U1163 and Pediatric Hematology and Immunology Unit, Necker Hospital for Sick Children, 75015 Paris, France Study Center for Primary Immunodeficiencies, Assistance Publique-Hôpitaux de Paris (AP-HP), Necker Hospital, 75015 Paris, France Imagine Institute, Paris Descartes University, 75015 Paris, France
| | - Stephanie Boisson-Dupuis
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, French Institute of Health and Medical Research (INSERM) U1163 and Pediatric Hematology and Immunology Unit, Necker Hospital for Sick Children, 75015 Paris, France St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY 10065
| | - Paul Gray
- St. Vincent's Clinical School and School of Women's and Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Polina Stepensky
- Department of Pediatric Hematology-Oncology and Bone Marrow Transplantation, Hadassah Medical Center, Hebrew University Medical Center, Jerusalem 91120, Israel
| | - Klaus Warnatz
- Center for Chronic Immunodeficiency, University Medical Center Freiburg, University of Freiburg, 79106 Freiburg, Germany
| | - Alexandra F Freeman
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
| | - Jamie Rossjohn
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences and Australian Research Council (ARC) Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia Department of Biochemistry and Molecular Biology, School of Biomedical Sciences and Australian Research Council (ARC) Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia Institute of Infection and Immunity, School of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, Wales, UK
| | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC 3000, Australia
| | - Steven M Holland
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
| | - Jean-Laurent Casanova
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, French Institute of Health and Medical Research (INSERM) U1163 and Pediatric Hematology and Immunology Unit, Necker Hospital for Sick Children, 75015 Paris, France Laboratory of Human Genetics of Infectious Diseases, Necker Branch, French Institute of Health and Medical Research (INSERM) U1163 and Pediatric Hematology and Immunology Unit, Necker Hospital for Sick Children, 75015 Paris, France Imagine Institute, Paris Descartes University, 75015 Paris, France St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY 10065 Howard Hughes Medical Institute, New York, NY 10065
| | - Gulbu Uzel
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, NIH, Bethesda, MD 20892
| | - Cindy S Ma
- Immunology Division, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia St. Vincent's Clinical School and School of Women's and Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Stuart G Tangye
- Immunology Division, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia St. Vincent's Clinical School and School of Women's and Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| | - Elissa K Deenick
- Immunology Division, Garvan Institute of Medical Research, Darlinghurst, Sydney, NSW 2010, Australia St. Vincent's Clinical School and School of Women's and Children's Health, University of New South Wales, Sydney, NSW 2052, Australia
| |
Collapse
|
43
|
Miyazaki M, Miyazaki K, Chen S, Chandra V, Wagatsuma K, Agata Y, Rodewald HR, Saito R, Chang AN, Varki N, Kawamoto H, Murre C. The E-Id protein axis modulates the activities of the PI3K-AKT-mTORC1-Hif1a and c-myc/p19Arf pathways to suppress innate variant TFH cell development, thymocyte expansion, and lymphomagenesis. Genes Dev 2015; 29:409-25. [PMID: 25691468 PMCID: PMC4335296 DOI: 10.1101/gad.255331.114] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Miyazaki et al. show that Id2 and Id3 suppress the development and expansion of innate variant TFH cells by acting upstream of the Hif1a/Foxo/AKT/mTORC1 pathway as well as the c-myc/p19Arf module. Mice depleted for Id2 and Id3 expression developed colitis and αβ T-cell lymphomas, and the transcription signatures of Id2- and Id3-depleted lymphomas revealed similarities to genetic deficiencies associated with Burkitt lymphoma. It is now well established that the E and Id protein axis regulates multiple steps in lymphocyte development. However, it remains unknown how E and Id proteins mechanistically enforce and maintain the naïve T-cell fate. Here we show that Id2 and Id3 suppressed the development and expansion of innate variant follicular helper T (TFH) cells. Innate variant TFH cells required major histocompatibility complex (MHC) class I-like signaling and were associated with germinal center B cells. We found that Id2 and Id3 induced Foxo1 and Foxp1 expression to antagonize the activation of a TFH transcription signature. We show that Id2 and Id3 acted upstream of the Hif1a/Foxo/AKT/mTORC1 pathway as well as the c-myc/p19Arf module to control cellular expansion. We found that mice depleted for Id2 and Id3 expression developed colitis and αβ T-cell lymphomas. Lymphomas depleted for Id2 and Id3 expression displayed elevated levels of c-myc, whereas p19Arf abundance declined. Transcription signatures of Id2- and Id3-depleted lymphomas revealed similarities to genetic deficiencies associated with Burkitt lymphoma. We propose that, in response to antigen receptor and/or cytokine signaling, the E–Id protein axis modulates the activities of the PI3K–AKT–mTORC1–Hif1a and c-myc/p19Arf pathways to control cellular expansion and homeostatic proliferation.
Collapse
Affiliation(s)
- Masaki Miyazaki
- Department of Molecular Biology, University of California at San Diego, La Jolla, California 92093, USA
| | - Kazuko Miyazaki
- Department of Molecular Biology, University of California at San Diego, La Jolla, California 92093, USA
| | - Shuwen Chen
- Department of Molecular Biology, University of California at San Diego, La Jolla, California 92093, USA
| | - Vivek Chandra
- Department of Molecular Biology, University of California at San Diego, La Jolla, California 92093, USA
| | - Keisuke Wagatsuma
- Department of Biochemistry and Molecular Biology, Shiga University of Medical School, Shiga 520-2192, Japan
| | - Yasutoshi Agata
- Department of Biochemistry and Molecular Biology, Shiga University of Medical School, Shiga 520-2192, Japan
| | - Hans-Reimer Rodewald
- Division of Cellular Immunology, German Cancer Research Center, D-69120 Heidelberg, Germany
| | - Rintaro Saito
- Department of Medicine, University of California at San Diego, La Jolla, California 92093, USA
| | - Aaron N Chang
- Center for Computational Biology, Institute for Genomic Medicine, University of California at San Diego, La Jolla, California 92093, USA
| | - Nissi Varki
- Department of Pathology, University of California at San Diego, La Jolla, California 92093, USA
| | - Hiroshi Kawamoto
- Department of Immunology, Institute for Frontier Medical Sciences, Kyoto University, Kyoto 606-8507, Japan
| | - Cornelis Murre
- Department of Molecular Biology, University of California at San Diego, La Jolla, California 92093, USA;
| |
Collapse
|
44
|
McWilliam HEG, Birkinshaw RW, Villadangos JA, McCluskey J, Rossjohn J. MR1 presentation of vitamin B-based metabolite ligands. Curr Opin Immunol 2015; 34:28-34. [PMID: 25603223 DOI: 10.1016/j.coi.2014.12.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 12/16/2014] [Indexed: 12/11/2022]
Abstract
The major histocompatibility complex class I-related molecule MR1 can bind a novel class of antigens, namely a family of related small organic vitamin B metabolites. When bound to MR1 these metabolites are presented to a population of innate-like T cells, mucosal-associated invariant T (MAIT) cells that express a semi-invariant T cell receptor (TCR). Several non-activating and activating MR1-restricted ligands have been described, which are the degradation products of, or intermediates of, vitamin B9 (folic acid) or vitamin B2 (riboflavin), respectively. The MAIT-activating intermediates of the riboflavin synthesis pathway are unique to a wide range of microbes, and accordingly represent a molecular signature of microbial infection. Recently insights into the binding of these vitamin B metabolites to MR1, and subsequent recognition by the MAIT TCR, have been gleaned, illustrating a novel antigen presentation system.
Collapse
Affiliation(s)
- Hamish E G McWilliam
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia
| | - Richard W Birkinshaw
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia
| | - Jose A Villadangos
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia; Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville,Victoria 3010, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria 3010, Australia.
| | - Jamie Rossjohn
- Department of Biochemistry and Molecular Biology, School of Biomedical Sciences, Monash University, Clayton, Victoria 3800, Australia; ARC Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria 3800, Australia; Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff CF14 4XN, UK.
| |
Collapse
|
45
|
O'Donnell H, McSorley SJ. Salmonella as a model for non-cognate Th1 cell stimulation. Front Immunol 2014; 5:621. [PMID: 25540644 PMCID: PMC4261815 DOI: 10.3389/fimmu.2014.00621] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Accepted: 11/21/2014] [Indexed: 01/13/2023] Open
Abstract
Salmonella has been a model pathogen for examining CD4 T cell activation and effector functions for many years due to the strength of the Th1 cell response observed during Salmonella infections, the relative ease of use of Salmonella, the availability of Salmonella-specific T cell reagents, and the well-characterized nature of the model system, the pathogen, and the immune response elicited. Herein, we discuss the use of Salmonella as a model pathogen to explore the complex interaction of T cells with their inflammatory environment. In particular, we address the issue of bystander activation of naïve T cells and non-cognate stimulation of activated and memory T cells. Further, we compare and contrast our current knowledge of these non-cognate responses in CD8 versus CD4 T cells. Finally, we make a case for Salmonella as a particularly appropriate model pathogen in the study of non-cognate CD4 T cell responses based on the strength of the Th1 response during infection, the requirement for CD4 T cells in bacterial clearance, and the well-characterized inflammatory response to conserved molecular patterns induced by Salmonella infection.
Collapse
Affiliation(s)
- Hope O'Donnell
- Department of Anatomy, Physiology and Cell Biology, Center for Comparative Medicine, School of Veterinary Medicine, University of California Davis , Davis, CA , USA ; Microbiology, Immunology, and Cancer Biology Graduate Program, University of Minnesota Medical School - Twin Cities , Minneapolis, MN , USA
| | - Stephen J McSorley
- Department of Anatomy, Physiology and Cell Biology, Center for Comparative Medicine, School of Veterinary Medicine, University of California Davis , Davis, CA , USA
| |
Collapse
|
46
|
Orme IM. Vaccines to prevent tuberculosis infection rather than disease: Physiological and immunological aspects. Tuberculosis (Edinb) 2014; 101:210-216. [PMID: 25500316 DOI: 10.1016/j.tube.2014.10.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 09/02/2014] [Accepted: 10/22/2014] [Indexed: 12/11/2022]
Abstract
There is increasing enthusiasm and optimism that a vaccine could be developed that prevents infection rather than disease. In this article I discuss the fact that despite this optimism nothing has been produced so far that seems to have this capability, and moreover even the borderline between when infection ends and disease begins has not even been defined. To be effective such a vaccine, or at least the immunity it would generate, would have to work within the confines of the pulmonary physiological systems, which are complex. To date much of the emphasis here has turned away from T cell mediated immunity and towards establishing specific antibodies in the lungs. Here, I argue that with the exception of a possible exclusionary function, most claims of a protective role of antibody are completely over-blown. Finally, even if we had a potential "anti-infection" vaccine, how would we test and validate it?
Collapse
Affiliation(s)
- Ian M Orme
- Mycobacteria Research Laboratories, Department of Microbiology, Immunology and Pathology, Colorado State University, Fort Collins, CO 80523, USA.
| |
Collapse
|
47
|
MAIT cells are depleted early but retain functional cytokine expression in HIV infection. Immunol Cell Biol 2014; 93:177-88. [PMID: 25348935 DOI: 10.1038/icb.2014.91] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Revised: 09/11/2014] [Accepted: 09/12/2014] [Indexed: 12/11/2022]
Abstract
Mucosal-associated invariant T (MAIT) cells home to mucosal sites and exert antimicrobial activity against bacteria and other microorganisms. HIV infection leads to early depletion of gut T cells and translocation of bacterial products. There are reports that MAIT cells, defined by coexpression of Vα7.2 and CD161, are depleted during HIV infection and residual MAIT cells are functionally impaired. However, one study suggested that MAIT cells might remain after HIV infection but evade detection through CD161 downregulation. Thus, the impact of HIV infection on MAIT cells is unclear. We studied longitudinal blood samples from 31 HIV-infected subjects for MAIT cell numbers, phenotype and function using both standard Vα7.2/CD161 surface markers and an MR1 tetramer. We found that MAIT cells were depleted early during HIV infection, and although there was a concomitant rise in Vα7.2(+)CD161(-) cells, these were MR1 tetramer negative, indicating that these are unlikely to be altered MAIT cells. Antigen-mediated activation of residual MAIT cells showed that they remained functional out to 2 years following HIV infection. Although MAIT cells are depleted in HIV infection, residual and functionally active MAIT cells persist and may still be able to assist in controlling bacterial translocation during HIV infection.
Collapse
|
48
|
Huson MAM, Grobusch MP, van der Poll T. The effect of HIV infection on the host response to bacterial sepsis. THE LANCET. INFECTIOUS DISEASES 2014; 15:95-108. [PMID: 25459220 DOI: 10.1016/s1473-3099(14)70917-x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Bacterial sepsis is an important cause of morbidity and mortality in patients with HIV. HIV causes increased susceptibility to invasive infections and affects sepsis pathogenesis caused by pre-existing activation and exhaustion of the immune system. We review the effect of HIV on different components of immune responses implicated in bacterial sepsis, and possible mechanisms underlying the increased risk of invasive bacterial infections. We focus on pattern recognition receptors and innate cellular responses, cytokines, lymphocytes, coagulation, and the complement system. A combination of factors causes increased susceptibility to infection and can contribute to a disturbed immune response during a septic event in patients with HIV. HIV-induced perturbations of the immune system depend on stage of infection and are only in part restored by combination antiretroviral therapy. Immunomodulatory treatments currently under development for sepsis might be particularly beneficial to patients with HIV co-infection because many pathogenic mechanisms in HIV and sepsis overlap.
Collapse
Affiliation(s)
- Michaëla A M Huson
- Division of Infectious Diseases, Centre of Experimental and Molecular Medicine, University of Amsterdam, Amsterdam, Netherlands.
| | - Martin P Grobusch
- Division of Infectious Diseases, Centre of Tropical Medicine and Travel Medicine, Academic Medical Centre, University of Amsterdam, Amsterdam, Netherlands
| | - Tom van der Poll
- Division of Infectious Diseases, Centre of Experimental and Molecular Medicine, University of Amsterdam, Amsterdam, Netherlands
| |
Collapse
|
49
|
Ivanov S, Paget C, Trottein F. Role of non-conventional T lymphocytes in respiratory infections: the case of the pneumococcus. PLoS Pathog 2014; 10:e1004300. [PMID: 25299581 PMCID: PMC4192596 DOI: 10.1371/journal.ppat.1004300] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Non-conventional T lymphocytes constitute a special arm of the immune system and act as sentinels against pathogens at mucosal surfaces. These non-conventional T cells (including mucosal-associated invariant T [MAIT] cells, gamma delta [γδ] T cells, and natural killer T [NKT] cells) display several innate cell-like features and are rapidly activated by the recognition of conserved, stress-induced, self, and microbial ligands. Here, we review the role of non-conventional T cells during respiratory infections, with a particular focus on the encapsulated extracellular pathogen Streptococcus pneumoniae, the leading cause of bacterial pneumonia worldwide. We consider whether MAIT cells, γδ T cells, and NKT cells might offer opportunities for preventing and/or treating human pneumococcus infections.
Collapse
Affiliation(s)
- Stoyan Ivanov
- Institut Pasteur de Lille, Centre d'Infection et d'Immunité de Lille, Lille, France
- Institut National de la Santé et de la Recherche Médicale, U1019, Lille, France
- Centre National de la Recherche Scientifique, UMR 8204, Lille, France
- Université Lille Nord de France, Lille, France
| | - Christophe Paget
- Institut Pasteur de Lille, Centre d'Infection et d'Immunité de Lille, Lille, France
- Institut National de la Santé et de la Recherche Médicale, U1019, Lille, France
- Centre National de la Recherche Scientifique, UMR 8204, Lille, France
- Université Lille Nord de France, Lille, France
| | - François Trottein
- Institut Pasteur de Lille, Centre d'Infection et d'Immunité de Lille, Lille, France
- Institut National de la Santé et de la Recherche Médicale, U1019, Lille, France
- Centre National de la Recherche Scientifique, UMR 8204, Lille, France
- Université Lille Nord de France, Lille, France
- * E-mail:
| |
Collapse
|
50
|
Reduced mucosal associated invariant T-cells are associated with increased disease severity and Pseudomonas aeruginosa infection in cystic fibrosis. PLoS One 2014; 9:e109891. [PMID: 25296025 PMCID: PMC4190362 DOI: 10.1371/journal.pone.0109891] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2014] [Accepted: 09/10/2014] [Indexed: 12/21/2022] Open
Abstract
Background Primary defects in host immune responses have been hypothesised to contribute towards an inability of subjects with cystic fibrosis (CF) to effectively clear pulmonary infections. Innate T-lymphocytes provide rapid pathogen-specific responses prior to the development of classical MHC class I and II restricted T-cell responses and are essential to the initial control of pulmonary infection. We aimed to examine the relationship between peripheral blood lymphocyte phenotype and clinical outcomes in adults with CF. Methods We studied 41 subjects with CF and 22, age matched, non-smoking healthy control subjects. Lymphocytes were extracted from peripheral blood samples and phenotyped by flow-cytometry. Lymphocyte phenotype was correlated with sputum microbiology and clinical parameters. Results In comparison to healthy control subjects, mucosal associated invariant T (MAIT)-lymphocytes were significantly reduced in the peripheral blood of subjects with CF (1.1% versus 2.0% of T-lymphocytes, P = 0.002). MAIT cell concentration was lowest in CF subjects infected with P. aeruginosa and in subjects receiving treatment for a pulmonary exacerbation. Furthermore a reduced MAIT cell concentration correlated with severity of lung disease. Conclusion Reduced numbers of MAIT cells in subjects with CF were associated with P. aeruginosa pulmonary infection, pulmonary exacerbations and more severe lung disease. These findings provide the impetus for future studies examining the utility of MAIT cells in immunotherapies and vaccine development. Longitudinal studies of MAIT cells as biomarkers of CF pulmonary infection are awaited.
Collapse
|