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Konecny AJ, Shows DM, Lord JD. Colonic mucosal associated invariant T cells in Crohn's disease have a diverse and non-public T cell receptor beta chain repertoire. PLoS One 2023; 18:e0285918. [PMID: 37922286 PMCID: PMC10624325 DOI: 10.1371/journal.pone.0285918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 10/13/2023] [Indexed: 11/05/2023] Open
Abstract
OBJECTIVES Mucosal-Associated Invariant T (MAIT) cells are T cells with a semi-invariant T cell receptor (TCR), recognizing riboflavin precursors presented by a non-polymorphic MR1 molecule. As these precursors are produced by the gut microbiome, we characterized the frequency, phenotype and clonality of MAIT cells in human colons with and without Crohn's disease (CD). METHODS The transcriptome of MAIT cells sorted from blood and intestinal lamina propria cells from colectomy recipients were compared with other CD8+ T cells. Colon biopsies from an additional ten CD patients and ten healthy controls (HC) were analyzed by flow cytometry. TCR genes were sequenced from individual MAIT cells from these biopsies and compared with those of MAIT cells from autologous blood. RESULTS MAIT cells in the blood and colon showed a transcriptome distinct from other CD8 T cells, with more expression of the IL-23 receptor. MAIT cells were enriched in the colons of CD patients, with less NKG2D in inflamed versus uninflamed segments. Regardless of disease, most MAIT cells expressed integrin α4β7 in the colon but not in the blood, where they were enriched for α4β7 expression. TCR sequencing revealed heterogeneity in the colon and blood, with few public sequences associated with cohorts. CONCLUSION MAIT cells are enriched in the colons of CD patients and disproportionately express molecules (IL-23R, integrin α4β7) targeted by CD therapeutics, to suggest a pathogenic role for them in CD. Public TCR sequences were neither common nor sufficiently restricted to a cohort to suggest protective or pathogenic antigen-specificities.
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Affiliation(s)
- Andrew J. Konecny
- Benaroya Research Institute, Translational Research Program, Seattle, WA, United States of America
- Department of Immunology, University of Washington, Seattle, WA, United States of America
| | - Donna M. Shows
- Benaroya Research Institute, Translational Research Program, Seattle, WA, United States of America
| | - James D. Lord
- Benaroya Research Institute, Translational Research Program, Seattle, WA, United States of America
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2
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Kurioka A, Klenerman P. Aging unconventionally: γδ T cells, iNKT cells, and MAIT cells in aging. Semin Immunol 2023; 69:101816. [PMID: 37536148 PMCID: PMC10804939 DOI: 10.1016/j.smim.2023.101816] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/19/2023] [Accepted: 07/20/2023] [Indexed: 08/05/2023]
Abstract
Unconventional T cells include γδ T cells, invariant Natural Killer T cells (iNKT) cells and Mucosal Associated Invariant T (MAIT) cells, which are distinguished from conventional T cells by their recognition of non-peptide ligands presented by non-polymorphic antigen presenting molecules and rapid effector functions that are pre-programmed during their development. Here we review current knowledge of the effect of age on unconventional T cells, from early life to old age, in both mice and humans. We then discuss the role of unconventional T cells in age-associated diseases and infections, highlighting the similarities between members of the unconventional T cell family in the context of aging.
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Affiliation(s)
- Ayako Kurioka
- Nuffield Department of Medicine, University of Oxford, Oxford, UK.
| | - Paul Klenerman
- Nuffield Department of Medicine, University of Oxford, Oxford, UK; Translational Gastroenterology Unit, University of Oxford, Oxford, UK
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3
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Seth P, Dubey S. IL-22 as a target for therapeutic intervention: Current knowledge on its role in various diseases. Cytokine 2023; 169:156293. [PMID: 37441942 DOI: 10.1016/j.cyto.2023.156293] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Revised: 06/12/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023]
Abstract
IL-22 has emerged as a crucial cytokine mediating protective response against pathogens and tissue regeneration. Dysregulated production of IL-22 has been shown to play a pivotal role in the pathogenesis of various diseases like malignant tumours, viral, cardiovascular, allergic and autoimmune disorders. Interleukin 22 belongs to IFN-IL-10 cytokine family. It is a major proinflammatory cytokine secreted by activated Th1 cells (Th22), though can also be secreted by many other immune cells like group 3 innate lymphocytes, γδ T cells, NK cells, NK T cells, and mucosal associated invariant T cells. Th22 cells exclusively release IL-22 but not IL-17 or IFN-γ (as Th1 cells releases IFN-γ along with IL-22 and Th17 cells releases IL-17 along with IL-22) and also express aryl hydrocarbon receptor as the key transcription factor. Th22 cells also exhibit expression of chemokine receptor CCR6 and skin-homing receptors CCR4 and CCR10 indicating the involvement of this subset in bolstering epithelial barrier immunity and promoting secretion of antimicrobial peptides (AMPs) from intestinal epithelial cells. The function of IL-22 is modulated by IL-22 binding protein (binds to IL-22 and inhibits it binding to its cell surface receptor); which serves as a competitor for IL-22R1 chain of IL-22 receptor. The pathogenic and protective nature of the Th22 cells is modulated both by the site of infected tissue and the type of disease pathology. This review aims to discuss key features of IL-22 biology, comparisons between IL and 22 and IFN-γ and its role as a potential immune therapy target in different maladies.
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Affiliation(s)
- Pranav Seth
- Amity Institute of Virology & Immunology, Amity University Uttar Pradesh, Sector 125, Noida, India
| | - Shweta Dubey
- Amity Institute of Virology & Immunology, Amity University Uttar Pradesh, Sector 125, Noida, India.
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4
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Dou X, Peng M, Jiang R, Li W, Zhang X. Upregulated CD8 + MAIT cell differentiation and KLRD1 gene expression after inactivated SARS-CoV-2 vaccination identified by single-cell sequencing. Front Immunol 2023; 14:1174406. [PMID: 37654490 PMCID: PMC10466403 DOI: 10.3389/fimmu.2023.1174406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Accepted: 06/30/2023] [Indexed: 09/02/2023] Open
Abstract
Background The primary strategy for reducing the incidence of COVID-19 is SARS-CoV-2 vaccination. Few studies have explored T cell subset differentiation and gene expressions induced by SARS-CoV-2 vaccines. Our study aimed to analyze T cell dynamics and transcriptome gene expression after inoculation with an inactivated SARS-CoV-2 vaccine by using single-cell sequencing. Methods Single-cell sequencing was performed after peripheral blood mononuclear cells were extracted from three participants at four time points during the inactivated SARS-CoV-2 vaccination process. After library preparation, raw read data analysis, quality control, dimension reduction and clustering, single-cell T cell receptor (TCR) sequencing, TCR V(D)J sequencing, cell differentiation trajectory inference, differentially expressed genes, and pathway enrichment were analyzed to explore the characteristics and mechanisms of postvaccination immunodynamics. Results Inactivated SARS-CoV-2 vaccination promoted T cell proliferation, TCR clone amplification, and TCR diversity. The proliferation and differentiation of CD8+ mucosal-associated invariant T (MAIT) cells were significantly upregulated, as were KLRD1 gene expression and the two pathways of nuclear-transcribed mRNA catabolic process, nonsense-mediated decay, and translational initiation. Conclusion Upregulation of CD8+ MAIT cell differentiation and KLRD1 expression after inactivated SARS-CoV-2 vaccination was demonstrated by single-cell sequencing. We conclude that the inactivated SARS-CoV-2 vaccine elicits adaptive T cell immunity to enhance early immunity and rapid response to the targeted virus.
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Affiliation(s)
- Xiaowen Dou
- Medical Laboratory of the Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Mian Peng
- Department of Critical Care Medicine, The Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Ruiwei Jiang
- Medical Laboratory of the Third Affiliated Hospital of Shenzhen University, Shenzhen, China
| | - Weiqin Li
- Department of Critical Care Medicine, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Xiuming Zhang
- Medical Laboratory of the Third Affiliated Hospital of Shenzhen University, Shenzhen, China
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5
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Zhang K, Chen L, Zhu C, Zhang M, Liang C. Current Knowledge of Th22 Cell and IL-22 Functions in Infectious Diseases. Pathogens 2023; 12:pathogens12020176. [PMID: 36839448 PMCID: PMC9965464 DOI: 10.3390/pathogens12020176] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/19/2023] [Accepted: 01/19/2023] [Indexed: 01/24/2023] Open
Abstract
T helper 22 (Th22) cells, a newly defined CD4+ T-cell lineage, are characterized by their distinct cytokine profile, which primarily consists of IL-13, IL-22 and TNF-α. Th22 cells express a wide spectrum of chemokine receptors, such as CCR4, CCR6 and CCR10. The main effector molecule secreted by Th22 cells is IL-22, a member of the IL-10 family, which acts by binding to IL-22R and triggering a complex downstream signaling system. Th22 cells and IL-22 have been found to play variable roles in human immunity. In preventing the progression of infections such as HIV and influenza, Th22/IL-22 exhibited protective anti-inflammatory characteristics, and their deleterious proinflammatory activities have been demonstrated to exacerbate other illnesses, including hepatitis B and Helicobacter pylori infection. Herein, we review the current understanding of Th22 cells, including their definition, differentiation and mechanisms, and the effect of Th22/IL-22 on human infectious diseases. According to studies on Th22 cells, Th22/IL-22 may be a promising therapeutic target and an effective treatment strategy for various infections.
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Affiliation(s)
- Kunyu Zhang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei 230022, China
- Institute of Urology, Anhui Medical University, Hefei 230022, China
- The Second Clinical Medical College, Anhui Medical University, Hefei 230032, China
| | - Lei Chen
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei 230022, China
- Institute of Urology, Anhui Medical University, Hefei 230022, China
| | - Chenyu Zhu
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei 230022, China
- Institute of Urology, Anhui Medical University, Hefei 230022, China
- The Second Clinical Medical College, Anhui Medical University, Hefei 230032, China
| | - Meng Zhang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei 230022, China
- Institute of Urology, Anhui Medical University, Hefei 230022, China
- Correspondence: (M.Z.); (C.L.); Tel./Fax: +86-55162922034 (M.Z.); +86-55162922034 (C.L.)
| | - Chaozhao Liang
- Department of Urology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China
- Anhui Province Key Laboratory of Genitourinary Diseases, Anhui Medical University, Hefei 230022, China
- Institute of Urology, Anhui Medical University, Hefei 230022, China
- Correspondence: (M.Z.); (C.L.); Tel./Fax: +86-55162922034 (M.Z.); +86-55162922034 (C.L.)
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6
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Su B, Kong D, Yang X, Zhang T, Kuang YQ. Mucosal-associated invariant T cells: a cryptic coordinator in HIV-infected immune reconstitution. J Med Virol 2022; 94:3043-3053. [PMID: 35243649 DOI: 10.1002/jmv.27696] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/20/2022] [Accepted: 03/01/2022] [Indexed: 11/11/2022]
Abstract
Human immunodeficiency virus type 1 (HIV-1) infection causes considerable morbidity and mortality worldwide. Although antiretroviral therapy (ART) has largely transformed HIV infection from a fatal disease to a chronic condition, approximately 10%~40% of HIV-infected individuals who receive effective ART and sustain long-term viral suppression still cannot achieve optimal immune reconstitution. These patients are called immunological non-responders, a state associated with poor clinical prognosis. Mucosal-associated invariant T (MAIT) cells are an evolutionarily conserved unconventional T cell subset defined by expression of semi-invariant αβ T cell receptor (TCR), which recognizes metabolites derived from the riboflavin biosynthetic pathway presented on major histocompatibility complex (MHC)-related protein-1 (MR1). MAIT cells, which are considered to act as a bridge between innate and adaptive immunity, produce a wide range of cytokines and cytotoxic molecules upon activation through TCR-dependent and TCR-independent mechanisms, which is of major importance in defense against a variety of pathogens. In addition, MAIT cells are involved in autoimmune and immune-mediated diseases. The number of MAIT cells is dramatically and irreversibly decreased in the early stage of HIV infection and is not fully restored even after long-term suppressive ART. In light of the important role of MAIT cells in mucosal immunity and because microbial translocation is inversely associated with CD4+ T cell counts, we propose that MAIT cells participate in the maintenance of intestinal barrier integrity and microbial homeostasis, thus further affecting immune reconstitution in HIV-infected individuals. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Bin Su
- Beijing Key Laboratory for HIV/AIDS Research, Clinical and Research Center for Infectious Diseases, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China.,Sino-French Joint Laboratory for Research on Humoral Immune Response to HIV Infection, Clinical and Research Center for Infectious Diseases, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China
| | - Deshenyue Kong
- NHC Key Laboratory of Drug Addiction Medicine, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, 650032, China.,Scientific Research Laboratory Center, First Affiliated Hospital of Kunming Medical University, Kunming, 650032, China
| | - Xiaodong Yang
- Beijing Key Laboratory for HIV/AIDS Research, Clinical and Research Center for Infectious Diseases, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China.,Sino-French Joint Laboratory for Research on Humoral Immune Response to HIV Infection, Clinical and Research Center for Infectious Diseases, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China
| | - Tong Zhang
- Beijing Key Laboratory for HIV/AIDS Research, Clinical and Research Center for Infectious Diseases, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China.,Sino-French Joint Laboratory for Research on Humoral Immune Response to HIV Infection, Clinical and Research Center for Infectious Diseases, Beijing Youan Hospital, Capital Medical University, Beijing, 100069, China
| | - Yi-Qun Kuang
- NHC Key Laboratory of Drug Addiction Medicine, First Affiliated Hospital of Kunming Medical University, Kunming Medical University, Kunming, 650032, China.,Scientific Research Laboratory Center, First Affiliated Hospital of Kunming Medical University, Kunming, 650032, China
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7
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Phetsouphanh C, Phalora P, Hackstein CP, Thornhill J, Munier CML, Meyerowitz J, Murray L, VanVuuren C, Goedhals D, Drexhage L, Russell RA, Sattentau QJ, Mak JYW, Fairlie DP, Fidler S, Kelleher AD, Frater J, Klenerman P. Human MAIT cells respond to and suppress HIV-1. eLife 2021; 10:e50324. [PMID: 34951583 PMCID: PMC8752121 DOI: 10.7554/elife.50324] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Accepted: 12/23/2021] [Indexed: 11/13/2022] Open
Abstract
Human MAIT cells sit at the interface between innate and adaptive immunity, are polyfunctional and are capable of killing pathogen infected cells via recognition of the Class IB molecule MR1. MAIT cells have recently been shown to possess an antiviral protective role in vivo and we therefore sought to explore this in relation to HIV-1 infection. There was marked activation of MAIT cells in vivo in HIV-1-infected individuals, which decreased following ART. Stimulation of THP1 monocytes with R5 tropic HIVBAL potently activated MAIT cells in vitro. This activation was dependent on IL-12 and IL-18 but was independent of the TCR. Upon activation, MAIT cells were able to upregulate granzyme B, IFNγ and HIV-1 restriction factors CCL3, 4, and 5. Restriction factors produced by MAIT cells inhibited HIV-1 infection of primary PBMCs and immortalized target cells in vitro. These data reveal MAIT cells to be an additional T cell population responding to HIV-1, with a potentially important role in controlling viral replication at mucosal sites.
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Affiliation(s)
- Chansavath Phetsouphanh
- Peter Medawar Building for Pathogen Research, University of OxfordOxfordUnited Kingdom
- The Kirby Institute, University of New South WalesSydneyAustralia
| | - Prabhjeet Phalora
- Peter Medawar Building for Pathogen Research, University of OxfordOxfordUnited Kingdom
| | | | | | | | - Jodi Meyerowitz
- Peter Medawar Building for Pathogen Research, University of OxfordOxfordUnited Kingdom
| | - Lyle Murray
- Peter Medawar Building for Pathogen Research, University of OxfordOxfordUnited Kingdom
| | | | - Dominique Goedhals
- Division of Virology, University of the Free State/National Health Laboratory ServiceFree StateSouth Africa
| | - Linnea Drexhage
- Sir William Dunn School of Pathology, University of OxfordOxfordUnited Kingdom
| | - Rebecca A Russell
- Sir William Dunn School of Pathology, University of OxfordOxfordUnited Kingdom
| | - Quentin J Sattentau
- Sir William Dunn School of Pathology, University of OxfordOxfordUnited Kingdom
| | - Jeffrey YW Mak
- ARC Centre of Excellence in Advanced Molecular Imaging, Institute for Molecular Bioscience, The University of QueenslandBrisbaneAustralia
- ARC Centre of Excellence in Advanced Molecular Imaging, Institute for Molecular Bioscience, The University of QueenslandBrisbaneAustralia
| | - David P Fairlie
- ARC Centre of Excellence in Advanced Molecular Imaging, Institute for Molecular Bioscience, The University of QueenslandBrisbaneAustralia
- ARC Centre of Excellence in Advanced Molecular Imaging, Institute for Molecular Bioscience, The University of QueenslandBrisbaneAustralia
| | | | | | - John Frater
- Peter Medawar Building for Pathogen Research, University of OxfordOxfordUnited Kingdom
| | - Paul Klenerman
- Peter Medawar Building for Pathogen Research, University of OxfordOxfordUnited Kingdom
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8
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The Emerging Roles of T Helper Cell Subsets and Cytokines in Severe Neutrophilic Asthma. Inflammation 2021; 45:1007-1022. [PMID: 34825300 DOI: 10.1007/s10753-021-01598-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 06/01/2021] [Accepted: 11/07/2021] [Indexed: 12/11/2022]
Abstract
Neutrophilic asthma (NA) is a severe type of steroid resistant asthma, and so far the immune mechanisms underlying NA are not clear. In this article, we performed a comprehensive assessment of Th-cell subsets and cytokines in severe NA patients. A total of 13 healthy individuals and 31 severe asthma patients were enrolled in this study. Refractory asthma patients were defined as those with eosinophilic asthma (EA, accounted for 32% of asthmatic patients) or NA (68%) according to sputum neutrophil/eosinophil counts or blood eosinophils. Th-cell subsets in peripheral blood mononuclear cells (PBMCs) were analyzed by flow cytometry, and cytokines were detected by cytometric bead array (CBA). The results showed significant differences were observed in Th-cell phenotypes, where the number of Th1 cells were reduced and the numbers of Th2 cells were increased in NA and EA groups, respectively, when compared with healthy controls. Th17 cells were not strongly associated with severe neutrophilic asthma. The frequencies of mucosal-associated invariant T (MAIT) cells were strikingly reduced in severe asthma patients, especially in the NA group. This NA group also showed increased levels of IL-17A, IL-17F, TNF-α, and IL-6 in serum and increased levels of IL-17A, IL-17F, IFN-γ, TNF-α, IL-1β, IL-5, IL-6, and IL-8 in sputum. In addition, sputum IL-6 was positively correlated with TNF-α, IFN-γ, IL-17A, and IL-8. Our results uncovered a controversial role for Th17 cells, which were reduced in severe asthma patients. Severe neutrophilic asthma was associated with a striking deficiency of MAIT cells and high pro-inflammatory cytokine levels.
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9
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Coker MO, Cairo C, Garzino-Demo A. HIV-Associated Interactions Between Oral Microbiota and Mucosal Immune Cells: Knowledge Gaps and Future Directions. Front Immunol 2021; 12:676669. [PMID: 34616391 PMCID: PMC8488204 DOI: 10.3389/fimmu.2021.676669] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Accepted: 08/06/2021] [Indexed: 02/02/2023] Open
Abstract
Even with sustained use of antiretroviral therapy (ART), HIV-infected individuals have an increased risk of systemic comorbid conditions and oral pathologies, including opportunistic infections, oral mucosal inflammation, and gingival and periodontal diseases. The immune-mediated mechanisms that drive this increased risk, in the context of sustained viral suppression, are unclear. HIV infection, even when controlled, alters microbial communities contributing to a chronic low-grade inflammatory state that underlies these non-HIV co-morbidities. The higher prevalence of dental caries, and mucosal and periodontal inflammation reported in HIV-infected individuals on ART is often associated with differentially abundant oral microbial communities, possibly leading to a heightened susceptibility to inflammation. This mini-review highlights current gaps in knowledge regarding the microbe-mediated oral mucosal immunity with HIV infection while discussing opportunities for future research investigations and implementation of novel approaches to elucidate these gaps. Interventions targeting both inflammation and microbial diversity are needed to mitigate oral inflammation-related comorbidities, particularly in HIV-infected individuals. More broadly, additional research is needed to bolster general models of microbiome-mediated chronic immune activation and aid the development of precise microbiota-targeted interventions to reverse or mitigate adverse outcomes.
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Affiliation(s)
- Modupe O Coker
- Department of Oral Biology, School of Dental Medicine at Rutgers, Newark, NJ, United States.,Department of Epidemiology, School of Public Health at Rutgers, Newark, NJ, United States
| | - Cristiana Cairo
- Institute of Human Virology, School of Medicine, University of Maryland, Baltimore, MD, United States.,Department of Medicine, School of Medicine, University of Maryland, Baltimore, MD, United States
| | - Alfredo Garzino-Demo
- Institute of Human Virology, School of Medicine, University of Maryland, Baltimore, MD, United States.,Department of Microbiology and Immunology, School of Medicine, University of Maryland, Baltimore, MD, United States.,Department of Molecular Medicine, University of Padova, Padova, Italy
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10
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Gong J, Zhan H, Liang Y, He Q, Cui D. Role of Th22 Cells in Human Viral Diseases. Front Med (Lausanne) 2021; 8:708140. [PMID: 34434945 PMCID: PMC8381044 DOI: 10.3389/fmed.2021.708140] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Accepted: 07/05/2021] [Indexed: 12/12/2022] Open
Abstract
Naive CD4+ T cells can differentiate into different cell subsets after receiving antigen stimulation, which secrete corresponding characteristic cytokines and thereby exert biological effects in various diseases. Th22 cells, a novel subset of CD4+ T cells, are different from Th1, Th2, Th17, and Treg cell subsets, which have been discovered in recent years. They can express CCR4, CCR6, and CCR10 molecules and secrete IL-22, IL-13, and TNF-α. They are not able to secrete IL-17, IL-4, and interferon-γ (IFN-γ). IL-22 is considered as a major effector molecule of Th22 cells whose functions and mechanisms of regulating cell differentiation have been constantly improved. In this review, we provide an overview of the origin, differentiation of Th22 cells. Moreover, we also describe the interrelationships between Th22 cells and Th17, Th1, and Th2 cells. Additionally, the role of Th22 cells were discussed in human diseases with virus infection, which will provide novel insight for the prevention and treatment of viral infection in human.
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Affiliation(s)
- Jianguang Gong
- Department of Nephrology, Nephrology Center, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, China
| | - Huifang Zhan
- Department of Emergency, Zhejiang University Hospital, Hangzhou, China
| | - Yan Liang
- Department of Nephrology, Nephrology Center, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, China.,Zhejiang Academy of Medical Sciences, Hangzhou, China
| | - Qiang He
- Department of Nephrology, Nephrology Center, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou, China
| | - Dawei Cui
- Department of Blood Transfusion, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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11
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Moriarty RV, Ellis AL, O’Connor SL. Monkeying around with MAIT Cells: Studying the Role of MAIT Cells in SIV and Mtb Co-Infection. Viruses 2021; 13:863. [PMID: 34066765 PMCID: PMC8151491 DOI: 10.3390/v13050863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/03/2021] [Accepted: 05/06/2021] [Indexed: 11/25/2022] Open
Abstract
There were an estimated 10 million new cases of tuberculosis (TB) disease in 2019. While over 90% of individuals successfully control Mycobacterium tuberculosis (Mtb) infection, which causes TB disease, HIV co-infection often leads to active TB disease. Despite the co-endemic nature of HIV and TB, knowledge of the immune mechanisms contributing to the loss of control of Mtb replication during HIV infection is lacking. Mucosal-associated invariant T (MAIT) cells are innate-like T cells that target and destroy bacterially-infected cells and may contribute to the control of Mtb infection. Studies examining MAIT cells in human Mtb infection are commonly performed using peripheral blood samples. However, because Mtb infection occurs primarily in lung tissue and lung-associated lymph nodes, these studies may not be fully translatable to the tissues. Additionally, studies longitudinally examining MAIT cell dynamics during HIV/Mtb co-infection are rare, and lung and lymph node tissue samples from HIV+ patients are typically unavailable. Nonhuman primates (NHP) provide a model system to characterize MAIT cell activity during Mtb infection, both in Simian Immunodeficiency Virus (SIV)-infected and SIV-naïve animals. Using NHPs allows for a more comprehensive understanding of tissue-based MAIT cell dynamics during infection with both pathogens. NHP SIV and Mtb infection is similar to human HIV and Mtb infection, and MAIT cells are phenotypically similar in humans and NHPs. Here, we discuss current knowledge surrounding MAIT cells in SIV and Mtb infection, how SIV infection impairs MAIT cell function during Mtb co-infection, and knowledge gaps to address.
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Affiliation(s)
| | | | - Shelby L. O’Connor
- Department of Pathology and Laboratory Medicine, University of Wisconsin-Madison, Madison, WI 53711, USA; (R.V.M.); (A.L.E.)
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12
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Paleja B, Low AHL, Kumar P, Saidin S, Lajam A, Nur Hazirah S, Chua C, Li Yun L, Albani S. Systemic Sclerosis Perturbs the Architecture of the Immunome. Front Immunol 2020; 11:1602. [PMID: 32849542 PMCID: PMC7423974 DOI: 10.3389/fimmu.2020.01602] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 06/16/2020] [Indexed: 11/13/2022] Open
Abstract
Systemic sclerosis (SSc) is an autoimmune disease characterized by excessive fibrosis of skin and internal organs, and vascular dysfunction. Association of T and B cell subsets has been reported in SSc; however, there is lack of systematic studies of functional relations between immune cell subsets in this disease. This lack of mechanistic knowledge hampers targeted intervention. In the current study we sought to determine differential immune cell composition and their interactions in peripheral blood of SSc patients. Mononuclear cells from blood of SSc patients (n = 20) and healthy controls (n = 10) were analyzed by mass cytometry using a 36-marker (cell surface and intracellular) panel. Transcriptome analysis (m-RNA sequencing) was performed on sorted T and B cell subsets. Unsupervised clustering analysis revealed significant differences in the frequencies of T and B cell subsets in patients. Correlation network analysis highlighted an overall dysregulated immune architecture coupled with domination of inflammatory senescent T cell modules in SSc patients. Transcriptome analysis of sorted immune cells revealed an activated phenotype of CD4 and mucosal associated invariant T (MAIT) cells in patients, accompanied by increased expression of inhibitory molecules, reminiscent of phenotype exhibited by functionally adapted, exhausted T cells in response to chronic stimulation. Overall, this study provides an in-depth analysis of the systemic immunome in SSc, highlighting the potential pathogenic role of inflammation and chronic stimulation-mediated “functional adaptation” of immune cells.
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Affiliation(s)
- Bhairav Paleja
- Translational Immunology Institute, Singhealth/Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Andrea Hsiu Ling Low
- Department of Rheumatology and Immunology, Singapore General Hospital, Singapore, Singapore.,Duke-NUS Medical School, Singapore, Singapore
| | - Pavanish Kumar
- Translational Immunology Institute, Singhealth/Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Suzan Saidin
- Translational Immunology Institute, Singhealth/Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Ahmad Lajam
- Translational Immunology Institute, Singhealth/Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Sharifah Nur Hazirah
- Translational Immunology Institute, Singhealth/Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Camillus Chua
- Translational Immunology Institute, Singhealth/Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Lai Li Yun
- Translational Immunology Institute, Singhealth/Duke-NUS Academic Medical Centre, Singapore, Singapore
| | - Salvatore Albani
- Translational Immunology Institute, Singhealth/Duke-NUS Academic Medical Centre, Singapore, Singapore
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13
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Chen Z, Wang H, D'Souza C, Koay HF, Meehan B, Zhao Z, Pediongco T, Shi M, Zhu T, Wang B, Kjer-Nielsen L, Eckle SBG, Rossjohn J, Fairlie DP, Godfrey DI, Strugnell RA, McCluskey J, Corbett AJ. Characterization and Purification of Mouse Mucosal-Associated Invariant T (MAIT) Cells. ACTA ACUST UNITED AC 2020; 127:e89. [PMID: 31763782 DOI: 10.1002/cpim.89] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This unit describes the utility of various mouse models of infection and immunization for studying mucosal-associated invariant T (MAIT) cell immunity: MAIT cells can be isolated from the lungs (or from other tissues/organs) and then identified and characterized by flow cytometry using MR1 tetramers in combination with a range of antibodies. The response kinetics, cytokine profiles, and functional differentiation of lung MAIT cells are studied following infection with the bacterial pathogen Legionella longbeachae or Salmonella enterica Typhimurium or immunization with synthetic MAIT cell antigen plus Toll-like receptor agonist. MAIT cells enriched or expanded during the process can be used for further studies. A step-by-step protocol is provided for MAIT cell sorting and adoptive transfer. Mice can then be challenged and MAIT cells tracked and further examined. © 2019 by John Wiley & Sons, Inc.
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Affiliation(s)
- Zhenjun Chen
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Huimeng Wang
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Criselle D'Souza
- Human Immunology Translational Research Lab (HITRL), Peter MacCallum Cancer Centre, Melbourne, Victoria, Australia
| | - Hui-Fern Koay
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Bronwyn Meehan
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Zhe Zhao
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Troi Pediongco
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Mai Shi
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia.,School of Medicine, Tsinghua University, Beijing, China
| | - Tianyuan Zhu
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Bingjie Wang
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Lars Kjer-Nielsen
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Sidonia B G Eckle
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Jamie Rossjohn
- Infection and Immunity Program and the Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, Monash University, Clayton, Victoria, Australia.,Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Wales, United Kingdom
| | - David P Fairlie
- Division of Chemistry and Structural Biology, Institute for Molecular Bioscience, The University of Queensland, Brisbane, Queensland, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, The University of Queensland, Brisbane, Queensland, Australia
| | - Dale I Godfrey
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia.,Australian Research Council Centre of Excellence in Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria, Australia
| | - Richard A Strugnell
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Alexandra J Corbett
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
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14
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Godfrey DI, Koay HF, McCluskey J, Gherardin NA. The biology and functional importance of MAIT cells. Nat Immunol 2019; 20:1110-1128. [PMID: 31406380 DOI: 10.1038/s41590-019-0444-8] [Citation(s) in RCA: 304] [Impact Index Per Article: 60.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 06/11/2019] [Indexed: 01/25/2023]
Abstract
In recent years, a population of unconventional T cells called 'mucosal-associated invariant T cells' (MAIT cells) has captured the attention of immunologists and clinicians due to their abundance in humans, their involvement in a broad range of infectious and non-infectious diseases and their unusual specificity for microbial riboflavin-derivative antigens presented by the major histocompatibility complex (MHC) class I-like protein MR1. MAIT cells use a limited T cell antigen receptor (TCR) repertoire with public antigen specificities that are conserved across species. They can be activated by TCR-dependent and TCR-independent mechanisms and exhibit rapid, innate-like effector responses. Here we review evidence showing that MAIT cells are a key component of the immune system and discuss their basic biology, development, role in disease and immunotherapeutic potential.
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Affiliation(s)
- Dale I Godfrey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, Australia.
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria, Australia.
| | - Hui-Fern Koay
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria, Australia
| | - James McCluskey
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, Australia
| | - Nicholas A Gherardin
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Parkville, Victoria, Australia
- Australian Research Council Centre of Excellence for Advanced Molecular Imaging, University of Melbourne, Parkville, Victoria, Australia
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15
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Abstract
As our understanding of mucosal immunity increases, it is becoming clear that the host response to HIV-1 is more complex and nuanced than originally believed. The mucosal landscape is populated with a variety of specialized cell types whose functions include combating infectious agents while preserving commensal microbiota, maintaining barrier integrity, and ensuring immune homeostasis. Advances in multiparameter flow cytometry, gene expression analysis and bioinformatics have allowed more detailed characterization of these cell types and their roles in host defense than was previously possible. This review provides an overview of existing literature on immunity to HIV-1 and SIVmac in mucosal tissues of the female reproductive tract and the gastrointestinal tract, focusing on major effector cell populations and briefly summarizing new information on tissue resident memory T cells, Treg, Th17, Th22 and innate lymphocytes (ILC), subsets that have been studied primarily in the gastrointestinal mucosa.
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Affiliation(s)
- Barbara L Shacklett
- Department of Medical Microbiology and Immunology.,Division of Infectious Diseases, Department of Medicine, School of Medicine, University of California, Davis, CA 95616
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16
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Chen P, Deng W, Li D, Zeng T, Huang L, Wang Q, Wang J, Zhang W, Yu X, Duan D, Wang J, Xia H, Chen H, Huang W, Li J, Zhang D, Zhong XP, Gao J. Circulating Mucosal-Associated Invariant T Cells in a Large Cohort of Healthy Chinese Individuals From Newborn to Elderly. Front Immunol 2019; 10:260. [PMID: 30838000 PMCID: PMC6389679 DOI: 10.3389/fimmu.2019.00260] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 01/29/2019] [Indexed: 11/13/2022] Open
Abstract
Mucosal-associated invariant T (MAIT) cells, which are enriched in human blood and express a semi-invariant TCR chain, play important roles in conditions such as infectious diseases and cancer. The influence of age on levels and functional characteristics of circulating MAIT cells have not been fully addressed. Here we have collected blood samples from a large cohort of healthy Chinese individuals from newborn (cord blood) to the elderly and assessed the levels of circulating MAIT cells as well as their phenotype, activation and apoptosis status, and cytokine expression profiles after in vitro stimulation. We found that the frequencies of circulating MAIT cells gradually increased in blood from newborns as they progressed into adulthood (20–40 years old) but then decreased during further progression toward old age (>60 years old). The lowered numbers of circulating MAIT cells in the elderly was correlated with a gradual increase of apoptosis. A majority of circulating MAIT cells expressed the chemokine receptors CCR5 and CCR6, and most also expressed CD8 and CD45RO. Few expressed CD69 in cord blood, but the frequency increased with age. Upon in vitro activation with PMA plus ionomycin or IL12 plus IL18, fewer MAIT cells isolated from the young adult group expressed IFN-γ, IL17A and Granzyme B then cells from other age groups while the proportion of cells that expressed TNF-α was similar. Taken together, our data provide information for guiding the assessment of normal levels and phenotypes of MAIT cells at different ages in healthy individuals and patients.
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Affiliation(s)
- Pengcheng Chen
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China.,Department of Clinical Laboratory, Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Wenhai Deng
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Dandan Li
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Tai Zeng
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Ling Huang
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Qun Wang
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Jinli Wang
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Weiguang Zhang
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xiaoxiao Yu
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Deming Duan
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Jinle Wang
- Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University Wenzhou, China
| | - Hong Xia
- First Affiliated Hospital of Wenzhou Medical University Wenzhou, China
| | - Hanbin Chen
- First Affiliated Hospital of Wenzhou Medical University Wenzhou, China
| | - Wesley Huang
- San Marino High School, San Marino, CA, United States
| | - Jingao Li
- Department of Radiation Oncology, Jiangxi Cancer Hospital, Nanchang, China
| | - Dahong Zhang
- Department of Urology, Zhejiang Provincial People's Hospital, Hangzhou, China
| | - Xiao-Ping Zhong
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China.,Department of Pediatrics, Division of Allergy and Immunology, Duke University Medical Center, Durham, NC, United States
| | - Jimin Gao
- Zhejiang Provincial Key Lab for Technology and Application of Model Organisms, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
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17
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Tuning of human MAIT cell activation by commensal bacteria species and MR1-dependent T-cell presentation. Mucosal Immunol 2018; 11:1591-1605. [PMID: 30115998 PMCID: PMC6279574 DOI: 10.1038/s41385-018-0072-x] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 07/16/2018] [Accepted: 07/23/2018] [Indexed: 02/04/2023]
Abstract
Human mucosal-associated invariant T (MAIT) cell receptors (TCRs) recognize bacterial riboflavin pathway metabolites through the MHC class 1-related molecule MR1. However, it is unclear whether MAIT cells discriminate between many species of the human microbiota. To address this, we developed an in vitro functional assay through human T cells engineered for MAIT-TCRs (eMAIT-TCRs) stimulated by MR1-expressing antigen-presenting cells (APCs). We then screened 47 microbiota-associated bacterial species from different phyla for their eMAIT-TCR stimulatory capacities. Only bacterial species that encoded the riboflavin pathway were stimulatory for MAIT-TCRs. Most species that were high stimulators belonged to Bacteroidetes and Proteobacteria phyla, whereas low/non-stimulator species were primarily Actinobacteria or Firmicutes. Activation of MAIT cells by high- vs low-stimulating bacteria also correlated with the level of riboflavin they secreted or after bacterial infection of macrophages. Remarkably, we found that human T-cell subsets can also present riboflavin metabolites to MAIT cells in a MR1-restricted fashion. This T-T cell-mediated signaling also induced IFNγ, TNF and granzyme B from MAIT cells, albeit at lower level than professional APC. These findings suggest that MAIT cells can discriminate and categorize complex human microbiota through computation of TCR signals depending on antigen load and presenting cells, and fine-tune their functional responses.
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18
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Ussher JE, Willberg CB, Klenerman P. MAIT cells and viruses. Immunol Cell Biol 2018; 96:630-641. [PMID: 29350807 PMCID: PMC6055725 DOI: 10.1111/imcb.12008] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 01/09/2018] [Accepted: 01/09/2018] [Indexed: 12/11/2022]
Abstract
Mucosal associated invariant T cells (MAIT cells) bear a T cell receptor (TCR) that specifically targets microbially derived metabolites. Functionally, they respond to bacteria and yeasts, which possess the riboflavin pathway, essential for production of such metabolites and which are presented on MR1. Viruses cannot generate these ligands, so a priori, they should not be recognized by MAIT cells and indeed this is true when considering recognition through the TCR. However, MAIT cells are distinctive in another respect, since they respond quite sensitively to non‐TCR signals, especially in the form of inflammatory cytokines. Thus, a number of groups have shown that virus infection can be “sensed” by MAIT cells and a functional response invoked. Since MAIT cells are abundant in humans, especially in tissues such as the liver, the question has arisen as to whether this TCR‐independent MAIT cell triggering by viruses plays any role in vivo. In this review, we will discuss the evidence for this phenomenon and some common features which emerge across different recent studies in this area.
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Affiliation(s)
- James E Ussher
- Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Christian B Willberg
- Peter Medawar Building for Pathogen Research, Nuffield Department of Medicine, University of Oxford, Oxford, UK.,NIHR Biomedical Research Centre, Oxford, UK
| | - Paul Klenerman
- Peter Medawar Building for Pathogen Research, Nuffield Department of Medicine, University of Oxford, Oxford, UK.,NIHR Biomedical Research Centre, Oxford, UK.,Translational Gastroenterology Unit, Oxford University Hospitals, Oxford, UK
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19
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Ghazarian L, Caillat-Zucman S, Houdouin V. Mucosal-Associated Invariant T Cell Interactions with Commensal and Pathogenic Bacteria: Potential Role in Antimicrobial Immunity in the Child. Front Immunol 2017; 8:1837. [PMID: 29326714 PMCID: PMC5736530 DOI: 10.3389/fimmu.2017.01837] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Accepted: 12/05/2017] [Indexed: 12/11/2022] Open
Abstract
Mucosal-associated invariant T (MAIT) cells are unconventional CD3+CD161high T lymphocytes that recognize vitamin B2 (riboflavin) biosynthesis precursor derivatives presented by the MHC-I related protein, MR1. In humans, their T cell receptor is composed of a Vα7.2-Jα33/20/12 chain, combined with a restricted set of Vβ chains. MAIT cells are very abundant in the liver (up to 40% of resident T cells) and in mucosal tissues, such as the lung and gut. In adult peripheral blood, they represent up to 10% of circulating T cells, whereas they are very few in cord blood. This large number of MAIT cells in the adult likely results from their gradual expansion with age following repeated encounters with riboflavin-producing microbes. Upon recognition of MR1 ligands, MAIT cells have the capacity to rapidly eliminate bacterially infected cells through the production of inflammatory cytokines (IFNγ, TNFα, and IL-17) and cytotoxic effector molecules (perforin and granzyme B). Thus, MAIT cells may play a crucial role in antimicrobial defense, in particular at mucosal sites. In addition, MAIT cells have been implicated in diseases of non-microbial etiology, including autoimmunity and other inflammatory diseases. Although their participation in various clinical settings has received increased attention in adults, data in children are scarce. Due to their innate-like characteristics, MAIT cells might be particularly important to control microbial infections in the young age, when long-term protective adaptive immunity is not fully developed. Herein, we review the data showing how MAIT cells may control microbial infections and how they discriminate pathogens from commensals, with a focus on models relevant for childhood infections.
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Affiliation(s)
- Liana Ghazarian
- INSERM UMR1149, Centre de Recherche sur l'Inflammation, Université Paris Diderot, Paris, France
| | - Sophie Caillat-Zucman
- INSERM UMR1149, Centre de Recherche sur l'Inflammation, Université Paris Diderot, Paris, France.,Laboratoire d'Immunologie, Hôpital Saint Louis, AP-HP, Paris, France
| | - Véronique Houdouin
- INSERM UMR1149, Centre de Recherche sur l'Inflammation, Université Paris Diderot, Paris, France.,Service des Maladies Digestives et Respiratoires de l'Enfant, Hôpital Robert Debré, AP-HP, Paris, France
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20
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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.
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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
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21
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Salou M, Franciszkiewicz K, Lantz O. MAIT cells in infectious diseases. Curr Opin Immunol 2017; 48:7-14. [DOI: 10.1016/j.coi.2017.07.009] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 07/03/2017] [Accepted: 07/07/2017] [Indexed: 01/03/2023]
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22
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Mekinian A, Mahevas T, Mohty M, Jachiet V, Rivière S, Fain O, Gaugler B. Mucosal-associated Invariant Cells are Deficient in Systemic Sclerosis. Scand J Immunol 2017; 86:216-220. [DOI: 10.1111/sji.12585] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Accepted: 07/13/2017] [Indexed: 12/30/2022]
Affiliation(s)
- A. Mekinian
- Sorbonne Universités; UPMC Université Paris 06; INSERM; Centre de Recherche Saint-Antoine (CRSA); Paris France
- AP-HP; Hôpital Saint-Antoine; Service de Médecine Interne et de l'Inflammation-(DHU i2B); Université Paris 06; Paris France
| | - T. Mahevas
- AP-HP; Hôpital Saint-Antoine; Service de Médecine Interne et de l'Inflammation-(DHU i2B); Université Paris 06; Paris France
| | - M. Mohty
- Sorbonne Universités; UPMC Université Paris 06; INSERM; Centre de Recherche Saint-Antoine (CRSA); Paris France
- AP-HP; Hôpital Saint-Antoine; Service d'Hématologie; Université Paris 06; Paris France
| | - V. Jachiet
- AP-HP; Hôpital Saint-Antoine; Service de Médecine Interne et de l'Inflammation-(DHU i2B); Université Paris 06; Paris France
| | - S. Rivière
- AP-HP; Hôpital Saint-Antoine; Service de Médecine Interne et de l'Inflammation-(DHU i2B); Université Paris 06; Paris France
| | - O. Fain
- AP-HP; Hôpital Saint-Antoine; Service de Médecine Interne et de l'Inflammation-(DHU i2B); Université Paris 06; Paris France
| | - B. Gaugler
- Sorbonne Universités; UPMC Université Paris 06; INSERM; Centre de Recherche Saint-Antoine (CRSA); Paris France
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