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Petkau G, Mitchell TJ, Evans MJ, Matheson L, Salerno F, Turner M. Zfp36l1 establishes the high-affinity CD8 T-cell response by directly linking TCR affinity to cytokine sensing. Eur J Immunol 2024; 54:e2350700. [PMID: 38039407 PMCID: PMC11146077 DOI: 10.1002/eji.202350700] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2023] [Revised: 11/29/2023] [Accepted: 11/30/2023] [Indexed: 12/03/2023]
Abstract
How individual T cells compete for and respond to IL-2 at the molecular level, and, as a consequence, how this shapes population dynamics and the selection of high-affinity clones is still poorly understood. Here we describe how the RNA binding protein ZFP36L1, acts as a sensor of TCR affinity to promote clonal expansion of high-affinity CD8 T cells. As part of an incoherent feed-forward loop, ZFP36L1 has a nonredundant role in suppressing multiple negative regulators of cytokine signaling and mediating a selection mechanism based on competition for IL-2. We suggest that ZFP36L1 acts as a sensor of antigen affinity and establishes the dominance of high-affinity T cells by installing a hierarchical response to IL-2.
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Affiliation(s)
- Georg Petkau
- The Babraham InstituteBabraham Research CampusCambridgeUnited Kingdom
| | - Twm J. Mitchell
- The Babraham InstituteBabraham Research CampusCambridgeUnited Kingdom
| | | | - Louise Matheson
- The Babraham InstituteBabraham Research CampusCambridgeUnited Kingdom
| | - Fiamma Salerno
- The Babraham InstituteBabraham Research CampusCambridgeUnited Kingdom
| | - Martin Turner
- The Babraham InstituteBabraham Research CampusCambridgeUnited Kingdom
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2
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Salhotra A, Falk L, Park G, Sandhu K, Ali H, Modi B, Hui S, Nakamura R. A review of low dose interleukin-2 therapy in management of chronic graft-versus-host-disease. Expert Rev Clin Immunol 2024; 20:169-184. [PMID: 37921226 DOI: 10.1080/1744666x.2023.2279188] [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: 05/07/2023] [Accepted: 10/31/2023] [Indexed: 11/04/2023]
Abstract
INTRODUCTION Patients with chronic graft versus host disease (cGVHD) have low circulating regulatory T cells (Tregs). Interleukin-2(IL-2) is a growth factor for Tregs, and clinical trials have explored its use in cGVHD patients. AREAS COVERED Here we will discuss the biology of IL-2, its rationale for use and results of clinical trials in cGVHD. We also describe its mechanisms of action and alteration in gene expression in T-cell subsets after treatment with low dose IL-2 and photopheresis. EXPERT OPINION Clinical trials using Low dose IL-2 have been done at single centers in small patient series. The majority of the clinical responses seen with IL-2 in cGVHD are classified as partial responses and efficacy as a single agent is limited. Compared to currently approved oral therapies, it has to be administered subcutaneously and requires specialized processing for compounding and storage limiting its widespread use. Its use is associated with constitutional symptoms and local injection site reactions. Local reactions can be easily managed by supportive care practices like rotation of injection sites and premeditations, constitutional symptoms resolve with, dose reduction (25-50%) allowing for continued therapy. Additional studies are needed to define optimal combination strategies with approved agents. Longer acting formulations of IL-2 that require less frequent dosing may also improve patient compliance.
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Affiliation(s)
- Amandeep Salhotra
- Department of Hematology and HCT, City of Hope National Medical Center, Duarte, USA
| | - Leah Falk
- Department of Hematology and HCT, City of Hope National Medical Center, Duarte, USA
| | - Gabriel Park
- Department of Pharmacy, City of Hope National Medical Center, Duarte, CA, USA
| | - Karamjeet Sandhu
- Department of Hematology and HCT, City of Hope National Medical Center, Duarte, USA
| | - Haris Ali
- Department of Hematology and HCT, City of Hope National Medical Center, Duarte, USA
| | - Badri Modi
- Department of Surgery, Division of Dermatology, City of Hope National Medical Center, Duarte, CA, USA
| | - Susanta Hui
- Department of Radiation Oncology, City of Hope Medical Center, Duarte, CA, USA
| | - Ryotaro Nakamura
- Department of Hematology and HCT, City of Hope National Medical Center, Duarte, USA
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3
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Tripathi S, Tsang JS, Park K. Systems immunology of regulatory T cells: can one circuit explain it all? Trends Immunol 2023; 44:766-781. [PMID: 37690962 PMCID: PMC10543564 DOI: 10.1016/j.it.2023.08.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/11/2023] [Accepted: 08/12/2023] [Indexed: 09/12/2023]
Abstract
Regulatory T (Treg) cells play vital roles in immune homeostasis and response, including discrimination between self- and non-self-antigens, containment of immunopathology, and inflammation resolution. These diverse functions are orchestrated by cellular circuits involving Tregs and other cell types across space and time. Despite dramatic progress in our understanding of Treg biology, a quantitative framework capturing how Treg-containing circuits give rise to these diverse functions is lacking. Here, we propose that different facets of Treg function can be interpreted as distinct operating regimes of the same underlying circuit. We discuss how a systems immunology approach, involving quantitative experiments, computational modeling, and machine learning, can advance our understanding of Treg function, and help identify general operating and design principles underlying immune regulation.
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Affiliation(s)
- Shubham Tripathi
- Yale Center for Systems and Engineering Immunology and Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA.
| | - John S Tsang
- Yale Center for Systems and Engineering Immunology and Department of Immunobiology, Yale School of Medicine, New Haven, CT 06520, USA; Department of Biomedical Engineering, Yale University, New Haven, CT 06520, USA; Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA.
| | - Kyemyung Park
- Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA; Graduate School of Health Science and Technology and Department of Biomedical Engineering, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea.
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4
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Cheng L, Liu L, Su R, Yan H, Zi X, Gao C, Li X, Wang C. The decreased of peripheral blood natural killer cell is associated with serum IL-2 level in the renal tubular acidosis in patients with primary sjogren's syndrome. BMC Immunol 2023; 24:17. [PMID: 37391717 PMCID: PMC10314557 DOI: 10.1186/s12865-023-00550-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 06/19/2023] [Indexed: 07/02/2023] Open
Abstract
BACKGROUND Primary Sjogren's Syndrome (pSS) is a lymphoproliferative disease with autoimmune characteristics, which is characterized by lymphocyte infiltration of exocrine glands and involvement and dysfunction of extraglandular organs. Renal tubular acidosis (RTA) is a common renal involvement in pSS. This study investigated the phenotypic characteristics of peripheral blood lymphocyte subsets and cytokines in pSS patients complicated with RTA (pSS-RTA). METHOD This retrospective study included 25 pSS patients complicated with RTA and 54 pSS patients without RTA (pSS-no-RTA). To examine the level of peripheral lymphocytes subsets, flow cytometry analysis was used. The level of serum cytokines were detected by flow cytometry bead array(CBA). The influencing factors related to the occurrence of pSS-RTA were identified through logistic regression analyze. RESULTS The absolute number of CD4 + T cells and Th2 cells in peripheral blood were decreased in pSS-RTA patients than pSS-no-RTA patients. Moreover, the absolute number of NK cells and Treg cells were also decreased in pSS-RTA patients than pSS-no-RTA. The level of serum IL-2 was higher in pSS-RTA patients than pSS-no-RTA patients, and is negatively correlated with the number of NK cells, the number and percentage of Th17 cells, and Th17/Treg. Serum IL-2 level is also correlated with various cytokines. Multivariate logistic analysis proved that elevated ESR and ALP were risk factors for pSS complicated with RTA, while Treg was a protective factor. CONCLUSION The increase of serum IL-2 level and the decrease of peripheral blood NK cells and Treg cells may be the immune mechanism of the development of pSS-RTA disease.
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Affiliation(s)
- Liyun Cheng
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Lu Liu
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Ronghui Su
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Huanhuan Yan
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Xiaoyu Zi
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Chong Gao
- Pathology, Joint Program in Transfusion Medicine, Children's Hospital, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Xiaofeng Li
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China
| | - Caihong Wang
- Department of Rheumatology, The Second Hospital of Shanxi Medical University, Taiyuan, Shanxi, China.
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5
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Simeonov DR, Park K, Cortez JT, Young A, Li Z, Nguyen V, Umhoefer J, Indart AC, Woo JM, Anderson MS, Tsang JS, Germain RN, Wong HS, Marson A. Non-coding sequence variation reveals fragility within interleukin 2 feedback circuitry and shapes autoimmune disease risk. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.17.545426. [PMID: 37503101 PMCID: PMC10370162 DOI: 10.1101/2023.06.17.545426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Genetic variants associated with human autoimmune diseases commonly map to non-coding control regions, particularly enhancers that function selectively in immune cells and fine-tune gene expression within a relatively narrow range of values. How such modest, cell-type-selective changes can meaningfully shape organismal disease risk remains unclear. To explore this issue, we experimentally manipulated species-conserved enhancers within the disease-associated IL2RA locus and studied accompanying changes in the progression of autoimmunity. Perturbing distinct enhancers with restricted activity in conventional T cells (Tconvs) or regulatory T cells (Tregs)-two functionally antagonistic T cell subsets-caused only modest, cell-type-selective decreases in IL2ra expression parameters. However, these same perturbations had striking and opposing effects in vivo , completely preventing or severely accelerating disease in a murine model of type 1 diabetes. Quantitative tissue imaging and computational modelling revealed that each enhancer manipulation impinged on distinct IL-2-dependent feedback circuits. These imbalances altered the intracellular signaling and intercellular communication dynamics of activated Tregs and Tconvs, producing opposing spatial domains that amplified or constrained ongoing autoimmune responses. These findings demonstrate how subtle changes in gene regulation stemming from non-coding variation can propagate across biological scales due to non-linearities in intra- and intercellular feedback circuitry, dramatically shaping disease risk at the organismal level.
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Nishiyama N, Ruoff P, Jimenez JC, Miwakeichi F, Nishiyama Y, Yata T. Modeling the interaction between donor-derived regulatory T cells and effector T cells early after allogeneic hematopoietic stem cell transplantation. Biosystems 2023; 227-228:104889. [PMID: 37019377 DOI: 10.1016/j.biosystems.2023.104889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 03/12/2023] [Accepted: 03/29/2023] [Indexed: 04/05/2023]
Abstract
While allogeneic hematopoietic stem cell transplantation (allo-HSCT) is a potential curative therapy against hematological malignancies, modulation of donor T cell alloreactivity is required to enhance the graft-versus-leukemia (GVL) effect and control graft-versus-host-disease (GVHD) after allo-HSCT. Donor-derived regulatory CD4+CD25+Foxp3+ T cells (Tregs) play a central role in establishing of immune tolerance after allo-HSCT. They could be a key target to be modulated for increasing the GVL effect and control of GVHD. We constructed an ordinary differential equation model incorporating bidirectional interactions between Tregs and effector CD4+ T cells (Teffs) as a mechanism for control of Treg cell concentration. The goal is to elucidate how the interaction between Tregs and Teffs is modulated in order to get insights into fine tuning of alloreactivity after allo-HSCT. The model was calibrated with respect to published Treg and Teff recovery data after allo-HSCT. The calibrated model exhibits perfect or near-perfect adaptation to stepwise perturbations between Treg and Teff interactions, as seen in Treg cell populations when patients with relapsed malignancy were treated with anti-CTLA-4 (cytotoxic T lymphocyte-associated antigen 4). In addition, the model predicts observed shifts of Tregs and Teffs concentrations after co-stimulatory receptor IL-2R or TNFR2 blockade with allo-HSCT. The present results suggest simultaneous blockades of co-stimulatory and co-inhibitory receptors as a potential treatment for enhancing the GVL effect after allo-HSCT without developing GVHD.
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7
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ALLERGY IS AN IMMUNE DISORDER RELATED TO A LACK OF REGULATION: THE GLUING ROLE OF IL-2. Immunol Lett 2022; 251-252:103-106. [DOI: 10.1016/j.imlet.2022.11.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 11/09/2022] [Accepted: 11/13/2022] [Indexed: 11/16/2022]
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8
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Muckenhuber M, Wekerle T, Schwarz C. Costimulation blockade and Tregs in solid organ transplantation. Front Immunol 2022; 13:969633. [PMID: 36119115 PMCID: PMC9478950 DOI: 10.3389/fimmu.2022.969633] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 08/15/2022] [Indexed: 12/02/2022] Open
Abstract
Regulatory T cells (Tregs) play a critical role in maintaining self-tolerance and in containing allo-immune responses in the context of transplantation. Recent advances yielded the approval of the first pharmaceutical costimulation blockers (abatacept and belatacept), with more of them in the pipeline. These costimulation blockers inhibit effector cells with high clinical efficacy to control disease activity, but might inadvertently also affect Tregs. Treg homeostasis is controlled by a complex network of costimulatory and coinhibitory signals, including CD28, the main target of abatacept/belatacept, and CTLA4, PD-1 and ICOS. This review shall give an overview on what effects the therapeutic manipulation of costimulation has on Treg function in transplantation.
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Affiliation(s)
- Moritz Muckenhuber
- Division of Transplantation, Department of General Surgery, Medical University of Vienna, Vienna, Austria
| | - Thomas Wekerle
- Division of Transplantation, Department of General Surgery, Medical University of Vienna, Vienna, Austria
- *Correspondence: Thomas Wekerle, ; Christoph Schwarz,
| | - Christoph Schwarz
- Division of Visceral Surgery, Department of General Surgery, Medical University of Vienna, Vienna, Austria
- *Correspondence: Thomas Wekerle, ; Christoph Schwarz,
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9
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Richard AC. Divide and Conquer: Phenotypic and Temporal Heterogeneity Within CD8+ T Cell Responses. Front Immunol 2022; 13:949423. [PMID: 35911755 PMCID: PMC9334874 DOI: 10.3389/fimmu.2022.949423] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 06/22/2022] [Indexed: 11/23/2022] Open
Abstract
The advent of technologies that can characterize the phenotypes, functions and fates of individual cells has revealed extensive and often unexpected levels of diversity between cells that are nominally of the same subset. CD8+ T cells, also known as cytotoxic T lymphocytes (CTLs), are no exception. Investigations of individual CD8+ T cells both in vitro and in vivo have highlighted the heterogeneity of cellular responses at the levels of activation, differentiation and function. This review takes a broad perspective on the topic of heterogeneity, outlining different forms of variation that arise during a CD8+ T cell response. Specific attention is paid to the impact of T cell receptor (TCR) stimulation strength on heterogeneity. In particular, this review endeavors to highlight connections between variation at different cellular stages, presenting known mechanisms and key open questions about how variation between cells can arise and propagate.
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10
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Whyte CE, Singh K, Burton OT, Aloulou M, Kouser L, Veiga RV, Dashwood A, Okkenhaug H, Benadda S, Moudra A, Bricard O, Lienart S, Bielefeld P, Roca CP, Naranjo-Galindo FJ, Lombard-Vadnais F, Junius S, Bending D, Ono M, Hochepied T, Halim TY, Schlenner S, Lesage S, Dooley J, Liston A. Context-dependent effects of IL-2 rewire immunity into distinct cellular circuits. J Exp Med 2022; 219:e20212391. [PMID: 35699942 PMCID: PMC9202720 DOI: 10.1084/jem.20212391] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 04/06/2022] [Accepted: 05/16/2022] [Indexed: 12/17/2022] Open
Abstract
Interleukin 2 (IL-2) is a key homeostatic cytokine, with therapeutic applications in both immunogenic and tolerogenic immune modulation. Clinical use has been hampered by pleiotropic functionality and widespread receptor expression, with unexpected adverse events. Here, we developed a novel mouse strain to divert IL-2 production, allowing identification of contextual outcomes. Network analysis identified priority access for Tregs and a competitive fitness cost of IL-2 production among both Tregs and conventional CD4 T cells. CD8 T and NK cells, by contrast, exhibited a preference for autocrine IL-2 production. IL-2 sourced from dendritic cells amplified Tregs, whereas IL-2 produced by B cells induced two context-dependent circuits: dramatic expansion of CD8+ Tregs and ILC2 cells, the latter driving a downstream, IL-5-mediated, eosinophilic circuit. The source-specific effects demonstrate the contextual influence of IL-2 function and potentially explain adverse effects observed during clinical trials. Targeted IL-2 production therefore has the potential to amplify or quench particular circuits in the IL-2 network, based on clinical desirability.
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Affiliation(s)
- Carly E. Whyte
- Immunology Programme, The Babraham Institute, Cambridge, UK
| | - Kailash Singh
- Immunology Programme, The Babraham Institute, Cambridge, UK
| | - Oliver T. Burton
- Immunology Programme, The Babraham Institute, Cambridge, UK
- VIB Center for Brain and Disease Research, Vlaams Instituut voor Biotechnologie, Leuven, Belgium
- Department of Microbiology, Immunology and Transplantation, KU Leuven—University of Leuven, Leuven, Belgium
| | - Meryem Aloulou
- Immunology Programme, The Babraham Institute, Cambridge, UK
- Toulouse Institute for Infectious and Inflammatory Diseases (Infinity), Centre national de la recherche scientifique U5051, Institut national de la santé et de la recherche médicale U1291, University of Toulouse III, Toulouse, France
| | - Lubna Kouser
- Immunology Programme, The Babraham Institute, Cambridge, UK
| | | | - Amy Dashwood
- Immunology Programme, The Babraham Institute, Cambridge, UK
| | | | - Samira Benadda
- Immunology Programme, The Babraham Institute, Cambridge, UK
- Centre de Recherche Sur L’inflammation, Centre national de la recherche scientifique ERL8252, Institut national de la santé et de la recherche médicale U1149, Université de Paris, Paris, France
| | - Alena Moudra
- Immunology Programme, The Babraham Institute, Cambridge, UK
| | - Orian Bricard
- Immunology Programme, The Babraham Institute, Cambridge, UK
| | | | | | - Carlos P. Roca
- Immunology Programme, The Babraham Institute, Cambridge, UK
| | | | - Félix Lombard-Vadnais
- Department of Microbiology and Immunology, McGill University, Montréal, Quebec, Canada
- Department of Immunology-Oncology, Maisonneuve-Rosemont Hospital, Montréal, Quebec, Canada
| | - Steffie Junius
- VIB Center for Brain and Disease Research, Vlaams Instituut voor Biotechnologie, Leuven, Belgium
- Department of Microbiology, Immunology and Transplantation, KU Leuven—University of Leuven, Leuven, Belgium
| | - David Bending
- Institute of Immunology and Immunotherapy, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Masahiro Ono
- Department of Life Sciences, Imperial College London, London, UK
| | - Tino Hochepied
- Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
- VIB Center for Inflammation Research, Vlaams Instituut voor Biotechnologie, Ghent, Belgium
| | | | - Susan Schlenner
- Department of Microbiology, Immunology and Transplantation, KU Leuven—University of Leuven, Leuven, Belgium
| | - Sylvie Lesage
- Centre de Recherche Sur L’inflammation, Centre national de la recherche scientifique ERL8252, Institut national de la santé et de la recherche médicale U1149, Université de Paris, Paris, France
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Quebec, Canada
| | - James Dooley
- Immunology Programme, The Babraham Institute, Cambridge, UK
- VIB Center for Brain and Disease Research, Vlaams Instituut voor Biotechnologie, Leuven, Belgium
- Department of Microbiology, Immunology and Transplantation, KU Leuven—University of Leuven, Leuven, Belgium
| | - Adrian Liston
- Immunology Programme, The Babraham Institute, Cambridge, UK
- VIB Center for Brain and Disease Research, Vlaams Instituut voor Biotechnologie, Leuven, Belgium
- Department of Microbiology, Immunology and Transplantation, KU Leuven—University of Leuven, Leuven, Belgium
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11
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Lam AJ, Haque M, Ward-Hartstonge KA, Uday P, Wardell CM, Gillies JK, Speck M, Mojibian M, Klein Geltink RI, Levings MK. PTEN is required for human Treg suppression of costimulation in vitro. Eur J Immunol 2022; 52:1482-1497. [PMID: 35746855 DOI: 10.1002/eji.202249888] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 05/18/2022] [Accepted: 06/10/2022] [Indexed: 11/07/2022]
Abstract
Regulatory T cell (Treg) therapy is under clinical investigation for the treatment of transplant rejection, autoimmune disease, and graft-versus-host disease. With the advent of genome editing, attention has turned to reinforcing Treg function for therapeutic benefit. A hallmark of Tregs is dampened activation of PI3K-AKT signalling, of which PTEN is a major negative regulator. Loss-of-function studies of PTEN, however, have not conclusively shown a requirement for PTEN in upholding Treg function and stability. Using CRISPR-based genome editing in human Tregs, we show that PTEN ablation does not cause a global defect in Treg function and stability; rather, it selectively blocks their ability to suppress antigen-presenting cells. PTEN-KO Tregs exhibit elevated glycolytic activity, upregulate FOXP3, maintain a Treg phenotype, and have no discernable defects in lineage stability. Functionally, PTEN is dispensable for human Treg-mediated inhibition of T cell activity in vitro and in vivo, but is required for suppression of costimulatory molecule expression by antigen-presenting cells. These data are the first to define a role for a signalling pathway in controlling a subset of human Treg activity. Moreover, they point to the functional necessity of PTEN-regulated PI3K-AKT activity for optimal human Treg function. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Avery J Lam
- BC Children's Hospital Research Institute, Vancouver, BC, V5Z 4H4, Canada.,Department of Surgery, University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Manjurul Haque
- BC Children's Hospital Research Institute, Vancouver, BC, V5Z 4H4, Canada.,Department of Surgery, University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Kirsten A Ward-Hartstonge
- BC Children's Hospital Research Institute, Vancouver, BC, V5Z 4H4, Canada.,Department of Surgery, University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Prakruti Uday
- BC Children's Hospital Research Institute, Vancouver, BC, V5Z 4H4, Canada.,Department of Surgery, University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Christine M Wardell
- BC Children's Hospital Research Institute, Vancouver, BC, V5Z 4H4, Canada.,Department of Surgery, University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Jana K Gillies
- BC Children's Hospital Research Institute, Vancouver, BC, V5Z 4H4, Canada.,Department of Surgery, University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Madeleine Speck
- BC Children's Hospital Research Institute, Vancouver, BC, V5Z 4H4, Canada.,Department of Surgery, University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Majid Mojibian
- BC Children's Hospital Research Institute, Vancouver, BC, V5Z 4H4, Canada.,Department of Surgery, University of British Columbia, Vancouver, BC, V5Z 1M9, Canada
| | - Ramon I Klein Geltink
- BC Children's Hospital Research Institute, Vancouver, BC, V5Z 4H4, Canada.,Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, V6T 2B5, Canada.,Department of Molecular Oncology, BC Cancer Research, Vancouver, BC, V5Z 1L3, Canada
| | - Megan K Levings
- BC Children's Hospital Research Institute, Vancouver, BC, V5Z 4H4, Canada.,Department of Surgery, University of British Columbia, Vancouver, BC, V5Z 1M9, Canada.,School of Biomedical Engineering, University of British Columbia, Vancouver, V6T 1Z3, Canada
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12
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Teh CE, Preston SP, Robbins AK, Stutz MD, Cooney J, Clark MP, Policheni AN, Allison CC, Mackiewicz L, Arandjelovic P, Ebert G, Doerflinger M, Tan T, Rankin LC, Teh PP, Belz GT, Kallies A, Strasser A, Pellegrini M, Gray DHD. Caspase-8 has dual roles in regulatory T cell homeostasis balancing immunity to infection and collateral inflammatory damage. Sci Immunol 2022; 7:eabn8041. [PMID: 35333545 DOI: 10.1126/sciimmunol.abn8041] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Targeting the potent immunosuppressive properties of FOXP3+ regulatory T cells (Tregs) has substantial therapeutic potential for treating autoimmune and inflammatory diseases. Yet, the molecular mechanisms controlling Treg homeostasis, particularly during inflammation, remain unclear. We report that caspase-8 is a central regulator of Treg homeostasis in a context-specific manner that is decisive during immune responses. In mouse genetic models, targeting caspase-8 in Tregs led to accumulation of effector Tregs resistant to apoptotic cell death. Conversely, inflammation induced the MLKL-dependent necroptosis of caspase-8-deficient lymphoid and tissue Tregs, which enhanced immunity to a variety of chronic infections to promote clearance of viral or parasitic pathogens. However, improved immunity came at the risk of lethal inflammation in overwhelming infections. Caspase-8 inhibition using a clinical-stage compound revealed that human Tregs have heightened sensitivity to necroptosis compared with conventional T cells. These findings reveal a fundamental mechanism in Tregs that could be targeted to manipulate the balance between immune tolerance versus response for therapeutic benefit.
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Affiliation(s)
- Charis E Teh
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Simon P Preston
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Alissa K Robbins
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Michael D Stutz
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - James Cooney
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Michelle P Clark
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Antonia N Policheni
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Cody C Allison
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Liana Mackiewicz
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
| | - Philip Arandjelovic
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Gregor Ebert
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Marcel Doerflinger
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Tania Tan
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia
| | - Lucille C Rankin
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Peggy P Teh
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia.,Department of Renal Medicine, Alfred Health, Melbourne, VIC, Australia.,Department of Nephrology, Western Health, Melbourne, VIC, Australia
| | - Gabrielle T Belz
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Axel Kallies
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC, Australia
| | - Andreas Strasser
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Marc Pellegrini
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
| | - Daniel H D Gray
- Walter and Eliza Hall Institute of Medical Research, Melbourne, VIC, Australia.,Department of Medical Biology, University of Melbourne, Melbourne, VIC, Australia
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13
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Frantz C, Cauvet A, Durand A, Gonzalez V, Pierre R, Do Cruzeiro M, Bailly K, Andrieu M, Orvain C, Avouac J, Ottaviani M, Thuillet R, Tu L, Guignabert C, Lucas B, Auffray C, Allanore Y. Driving Role of Interleukin-2-Related Regulatory CD4+ T Cell Deficiency in the Development of Lung Fibrosis and Vascular Remodeling in a Mouse Model of Systemic Sclerosis. Arthritis Rheumatol 2022; 74:1387-1398. [PMID: 35255201 DOI: 10.1002/art.42111] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 01/18/2022] [Accepted: 03/03/2022] [Indexed: 11/10/2022]
Abstract
OBJECTIVE Systemic sclerosis (SSc) is a debilitating autoimmune disease characterized by severe lung outcomes resulting in reduced life expectancy. Fra-2-transgenic mice offer the opportunity to decipher the relationships between the immune system and lung fibrosis. This study was undertaken to investigate whether the Fra-2-transgenic mouse lung phenotype may result from an imbalance between the effector and regulatory arms in the CD4+ T cell compartment. METHODS We first used multicolor flow cytometry to extensively characterize homeostasis and the phenotype of peripheral CD4+ T cells from Fra-2-transgenic mice and control mice. We then tested different treatments for their effectiveness in restoring CD4+ Treg cell homeostasis, including adoptive transfer of Treg cells and treatment with low-dose interleukin-2 (IL-2). RESULTS Fra-2-transgenic mice demonstrated a marked decrease in the proportion and absolute number of peripheral Treg cells that preceded accumulation of activated, T helper cell type 2-polarized, CD4+ T cells. This defect in Treg cell homeostasis was derived from a combination of mechanisms including impaired generation of these cells in both the thymus and the periphery. The impaired ability of peripheral conventional CD4+ T cells to produce IL-2 may greatly contribute to Treg cell deficiency in Fra-2-transgenic mice. Notably, adoptive transfer of Treg cells, low-dose IL-2 therapy, or combination therapy changed the phenotype of Fra-2-transgenic mice, resulting in a significant reduction in pulmonary parenchymal fibrosis and vascular remodeling in the lungs. CONCLUSION Immunotherapies for restoring Treg cell homeostasis could be relevant in SSc. An intervention based on low-dose IL-2 injections, as is already proposed in other autoimmune diseases, could be the most suitable treatment modality for restoring Treg cell homeostasis for future research.
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Affiliation(s)
- Camelia Frantz
- Université de Paris, Inserm U1016, CNRS UMR 8104, and Cochin Hospital, Paris, France
| | - Anne Cauvet
- Université de Paris, Inserm U1016, CNRS UMR 8104, Paris, France
| | - Aurélie Durand
- Université de Paris, Inserm U1016, CNRS UMR 8104, Paris, France
| | | | - Rémi Pierre
- Université de Paris, Inserm U1016, CNRS UMR 8104, Paris, France
| | | | - Karine Bailly
- Université de Paris, Inserm U1016, CNRS UMR 8104, Paris, France
| | - Muriel Andrieu
- Université de Paris, Inserm U1016, CNRS UMR 8104, Paris, France
| | - Cindy Orvain
- Université de Paris, Inserm U1016, CNRS UMR 8104, Paris, France
| | - Jérôme Avouac
- Université de Paris, Inserm U1016, CNRS UMR 8104, and Cochin Hospital, Paris, France
| | - Mina Ottaviani
- INSERM UMR S 999, Hôpital Marie Lannelongue, and Université Paris-Saclay, Paris, France
| | - Raphaël Thuillet
- INSERM UMR S 999, Hôpital Marie Lannelongue, and Université Paris-Saclay, Paris, France
| | - Ly Tu
- INSERM UMR S 999, Hôpital Marie Lannelongue, and Université Paris-Saclay, Paris, France
| | - Christophe Guignabert
- INSERM UMR S 999, Hôpital Marie Lannelongue, and Université Paris-Saclay, Paris, France
| | - Bruno Lucas
- Université de Paris, Inserm U1016, CNRS UMR 8104, Paris, France
| | - Cédric Auffray
- Université de Paris, Inserm U1016, CNRS UMR 8104, Paris, France
| | - Yannick Allanore
- Université de Paris, Inserm U1016, CNRS UMR 8104, and Cochin Hospital, Paris, France
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14
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Heluany CS, Scharf P, Schneider AH, Donate PB, Dos Reis Pedreira Filho W, de Oliveira TF, Cunha FQ, Farsky SHP. Toxic mechanisms of cigarette smoke and heat-not-burn tobacco vapor inhalation on rheumatoid arthritis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 809:151097. [PMID: 34695477 DOI: 10.1016/j.scitotenv.2021.151097] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/24/2021] [Accepted: 10/16/2021] [Indexed: 06/13/2023]
Abstract
Tobacco combustion exposure worsens rheumatoid arthritis (RA). Non-combustible tobacco devices, as heat-not-burn tobacco (HNBT), are emerging as harm reduction to smokers by releasing nicotine and lower combustible tobacco products. Nevertheless, HNBT toxicity remains unclear. Hence, here we investigated the impacts of the tobacco combustible product (cigarette smoke; CS) or HNBT vapor exposures on antigen-induced arthritis (AIA) in C57BL/6 mice. Animals were exposed to airflow, HNBT vapor, or CS during 1 h/twice a day, under the Health Canada Intense (HCI) smoking regime, between days 14 to 20 after the first immunization. At day 21, 16 h after the last exposures, mice were i.a. challenged and the AIA effects were evaluated 24 h later. CS- or HNBT-exposed mice presented equivalent blood nicotine levels. CS exposure worsened articular symptoms, pulmonary inflammation, and expression of lung metallothioneins. Nevertheless, CS or HNBT exposures reduced lymphoid organs' cellularity, splenocyte proliferation and IL-2 secretion. Additional in vitro CS or HNBT exposures confirmed the harmful effects on splenocytes, which were partially mediated by the activation of nicotine/α7nAchR pathway. Associated, data demonstrate the toxic mechanisms of CS or HNBT inhalation at HCI regime on RA, and highlight that further investigations are fundamental to assure the toxicity of emerging tobacco products on the immune system during specific challenges.
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Affiliation(s)
- Cintia Scucuglia Heluany
- Department of Clinical & Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, SP, Brazil
| | - Pablo Scharf
- Department of Clinical & Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, SP, Brazil
| | | | - Paula Barbim Donate
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil
| | | | - Tiago Franco de Oliveira
- Department of Pharmacosciences, Federal University of Health Sciences of Porto Alegre, Porto Alegre, RS, Brazil
| | - Fernando Queiroz Cunha
- Department of Pharmacology, Ribeirao Preto Medical School, University of Sao Paulo, Brazil
| | - Sandra Helena Poliselli Farsky
- Department of Clinical & Toxicological Analyses, School of Pharmaceutical Sciences, University of Sao Paulo, SP, Brazil.
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15
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Pyle CJ, Labeur-Iurman L, Groves HT, Puttur F, Lloyd CM, Tregoning JS, Harker JA. Enhanced IL-2 in early life limits the development of TFH and protective antiviral immunity. J Exp Med 2021; 218:e20201555. [PMID: 34665220 PMCID: PMC8529914 DOI: 10.1084/jem.20201555] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/23/2021] [Accepted: 09/23/2021] [Indexed: 01/03/2023] Open
Abstract
T follicular helper cell (TFH)-dependent antibody responses are critical for long-term immunity. Antibody responses are diminished in early life, limiting long-term protective immunity and allowing prolonged or recurrent infection, which may be important for viral lung infections that are highly prevalent in infancy. In a murine model using respiratory syncytial virus (RSV), we show that TFH and the high-affinity antibody production they promote are vital for preventing disease on RSV reinfection. Following a secondary RSV infection, TFH-deficient mice had significantly exacerbated disease characterized by delayed viral clearance, increased weight loss, and immunopathology. TFH generation in early life was compromised by heightened IL-2 and STAT5 signaling in differentiating naive T cells. Neutralization of IL-2 during early-life RSV infection resulted in a TFH-dependent increase in antibody-mediated immunity and was sufficient to limit disease severity upon reinfection. These data demonstrate the importance of TFH in protection against recurrent RSV infection and highlight a mechanism by which this is suppressed in early life.
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Affiliation(s)
- Chloe J. Pyle
- National Heart and Lung Institute, Imperial College London, South Kensington, London, UK
| | - Lucia Labeur-Iurman
- National Heart and Lung Institute, Imperial College London, South Kensington, London, UK
| | - Helen T. Groves
- Department of Infectious Disease, Imperial College London, St. Mary’s Campus, London, UK
| | - Franz Puttur
- National Heart and Lung Institute, Imperial College London, South Kensington, London, UK
| | - Clare M. Lloyd
- National Heart and Lung Institute, Imperial College London, South Kensington, London, UK
- Asthma UK Centre in Allergic Mechanisms for Asthma, London, UK
| | - John S. Tregoning
- Department of Infectious Disease, Imperial College London, St. Mary’s Campus, London, UK
| | - James A. Harker
- National Heart and Lung Institute, Imperial College London, South Kensington, London, UK
- Asthma UK Centre in Allergic Mechanisms for Asthma, London, UK
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16
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Wong HS, Germain RN. Mesoscale T cell antigen discrimination emerges from intercellular feedback. Trends Immunol 2021; 42:865-875. [PMID: 34493455 DOI: 10.1016/j.it.2021.08.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 08/13/2021] [Accepted: 08/13/2021] [Indexed: 12/14/2022]
Abstract
Mature T cells must distinguish between foreign and self-antigens to promote host defense while limiting autoimmunity. How such discrimination occurs reproducibly has been explored extensively regarding mechanisms regulating initial T cell activation at short time and length scales. Here, we suggest that T cells encounter a higher-level discriminatory boundary post-activation, empowering or constraining their responses over greater spatiotemporal scales. This boundary emerges from coordinated communication among at least three cell types, forming a control system governed by intercellular circuits, including negative feedback from regulatory T cells (Tregs). We propose that the nonlinearities inherent to this system can amplify subtle baseline imbalances in a single cell type's functional state, altering the threshold for productive T cell responses and autoimmune disease risk.
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Affiliation(s)
- Harikesh S Wong
- Lymphocyte Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA.
| | - Ronald N Germain
- Lymphocyte Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA.
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17
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Bardou M, Postat J, Loaec C, Lemaître F, Ronteix G, Garcia Z, Bousso P. Quorum sensing governs collective dendritic cell activation in vivo. EMBO J 2021; 40:e107176. [PMID: 34124789 PMCID: PMC8327941 DOI: 10.15252/embj.2020107176] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 05/10/2021] [Accepted: 05/14/2021] [Indexed: 01/11/2023] Open
Abstract
Dendritic cell (DC) activation by viral RNA sensors such as TLR3 and MDA-5 is critical for initiating antiviral immunity. Optimal DC activation is promoted by type I interferon (IFN) signaling which is believed to occur in either autocrine or paracrine fashion. Here, we show that neither autocrine nor paracrine type I IFN signaling can fully account for DC activation by poly(I:C) in vitro and in vivo. By controlling the density of type I IFN-producing cells in vivo, we establish that instead a quorum of type I IFN-producing cells is required for optimal DC activation and that this process proceeds at the level of an entire lymph node. This collective behavior, governed by type I IFN diffusion, is favored by the requirement for prolonged cytokine exposure to achieve DC activation. Furthermore, collective DC activation was found essential for the development of innate and adaptive immunity in lymph nodes. Our results establish how collective rather than cell-autonomous processes can govern the initiation of immune responses.
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Affiliation(s)
- Margot Bardou
- Dynamics of Immune Responses UnitEquipe Labellisée Ligue Contre le CancerInstitut PasteurParisFrance
- INSERM U1223ParisFrance
| | - Jérémy Postat
- Dynamics of Immune Responses UnitEquipe Labellisée Ligue Contre le CancerInstitut PasteurParisFrance
- INSERM U1223ParisFrance
- Université de ParisParisFrance
| | - Clémence Loaec
- Dynamics of Immune Responses UnitEquipe Labellisée Ligue Contre le CancerInstitut PasteurParisFrance
- INSERM U1223ParisFrance
| | - Fabrice Lemaître
- Dynamics of Immune Responses UnitEquipe Labellisée Ligue Contre le CancerInstitut PasteurParisFrance
- INSERM U1223ParisFrance
| | - Gustave Ronteix
- Physical microfluidics and BioengineeringInstitut PasteurParisFrance
- LadHyXCNRSEcole PolytechniqueInstitut Polytechnique de ParisPalaiseauFrance
| | - Zacarias Garcia
- Dynamics of Immune Responses UnitEquipe Labellisée Ligue Contre le CancerInstitut PasteurParisFrance
- INSERM U1223ParisFrance
| | - Philippe Bousso
- Dynamics of Immune Responses UnitEquipe Labellisée Ligue Contre le CancerInstitut PasteurParisFrance
- INSERM U1223ParisFrance
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18
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Exploring the Pathogenic Role and Therapeutic Implications of Interleukin 2 in Autoimmune Hepatitis. Dig Dis Sci 2021; 66:2493-2512. [PMID: 32833154 DOI: 10.1007/s10620-020-06562-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2020] [Accepted: 08/12/2020] [Indexed: 12/11/2022]
Abstract
Interleukin 2 is essential for the expansion of regulatory T cells, and low-dose recombinant interleukin 2 has improved the clinical manifestations of diverse autoimmune diseases in preliminary studies. The goals of this review are to describe the actions of interleukin 2 and its receptor, present preliminary experiences with low-dose interleukin 2 in the treatment of diverse autoimmune diseases, and evaluate its potential as a therapeutic intervention in autoimmune hepatitis. English abstracts were identified in PubMed by multiple search terms. Full-length articles were selected for review, and secondary and tertiary bibliographies were developed. Interleukin 2 is critical for the thymic selection, peripheral expansion, induction, and survival of regulatory T cells, and it is also a growth factor for activated T cells and natural killer cells. Interleukin 2 activates the signal transducer and activator of transcription 5 after binding with its trimeric receptor on regulatory T cells. Immune suppressor activity is increased; anti-inflammatory interleukin 10 is released; pro-inflammatory interferon-gamma is inhibited; and activation-induced apoptosis of CD8+ T cells is upregulated. Preliminary experiences with cyclic injections of low-dose recombinant interleukin 2 in diverse autoimmune diseases have demonstrated increased numbers of circulating regulatory T cells, preserved regulatory function, improved clinical manifestations, and excellent tolerance. Similar improvements have been recognized in one of two patients with refractory autoimmune hepatitis. In conclusion, interferon 2 has biological actions that favor the immune suppressor functions of regulatory T cells, and low-dose regimens in preliminary studies encourage its rigorous investigation in autoimmune hepatitis.
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19
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Wong HS, Park K, Gola A, Baptista AP, Miller CH, Deep D, Lou M, Boyd LF, Rudensky AY, Savage PA, Altan-Bonnet G, Tsang JS, Germain RN. A local regulatory T cell feedback circuit maintains immune homeostasis by pruning self-activated T cells. Cell 2021; 184:3981-3997.e22. [PMID: 34157301 PMCID: PMC8390950 DOI: 10.1016/j.cell.2021.05.028] [Citation(s) in RCA: 51] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 01/29/2021] [Accepted: 05/18/2021] [Indexed: 12/21/2022]
Abstract
A fraction of mature T cells can be activated by peripheral self-antigens, potentially eliciting host autoimmunity. We investigated homeostatic control of self-activated T cells within unperturbed tissue environments by combining high-resolution multiplexed and volumetric imaging with computational modeling. In lymph nodes, self-activated T cells produced interleukin (IL)-2, which enhanced local regulatory T cell (Treg) proliferation and inhibitory functionality. The resulting micro-domains reciprocally constrained inputs required for damaging effector responses, including CD28 co-stimulation and IL-2 signaling, constituting a negative feedback circuit. Due to these local constraints, self-activated T cells underwent transient clonal expansion, followed by rapid death ("pruning"). Computational simulations and experimental manipulations revealed the feedback machinery's quantitative limits: modest reductions in Treg micro-domain density or functionality produced non-linear breakdowns in control, enabling self-activated T cells to subvert pruning. This fine-tuned, paracrine feedback process not only enforces immune homeostasis but also establishes a sharp boundary between autoimmune and host-protective T cell responses.
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Affiliation(s)
- Harikesh S Wong
- Lymphocyte Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA.
| | - Kyemyung Park
- Multiscale Systems Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA; Biophysics program, Institute for Physical Science and Technology, University of Maryland, College Park, MD 20742, USA
| | - Anita Gola
- Lymphocyte Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA
| | - Antonio P Baptista
- Lymphocyte Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA; Laboratory of Immunoregulation and Mucosal Immunology, VIB-UGhent Center for Inflammation Research, Ghent University, 9052 Ghent, Belgium; Department of Internal Medicine and Pediatrics, Ghent University, 9000 Ghent, Belgium
| | | | - Deeksha Deep
- Howard Hughes Medical Institute, Immunology Program and Ludwig Center for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Meng Lou
- Lymphocyte Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA
| | - Lisa F Boyd
- Molecular Biology Section, Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Alexander Y Rudensky
- Howard Hughes Medical Institute, Immunology Program and Ludwig Center for Cancer Immunotherapy, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Peter A Savage
- Department of Pathology, University of Chicago, Chicago, IL 60637, USA
| | - Grégoire Altan-Bonnet
- Immunodynamics Group, Cancer and Inflammation Program, National Cancer Institute, National Institutes of Health, Bethesda, MD, USA
| | - John S Tsang
- Multiscale Systems Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA
| | - Ronald N Germain
- Lymphocyte Biology Section, Laboratory of Immune System Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA.
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20
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Li Y, Tunbridge HM, Britton GJ, Hill EV, Sinai P, Cirillo S, Thompson C, Fallah-Arani F, Dovedi SJ, Wraith DC, Wülfing C. A LAT-Based Signaling Complex in the Immunological Synapse as Determined with Live Cell Imaging Is Less Stable in T Cells with Regulatory Capability. Cells 2021; 10:418. [PMID: 33671236 PMCID: PMC7921939 DOI: 10.3390/cells10020418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/12/2021] [Accepted: 02/12/2021] [Indexed: 12/03/2022] Open
Abstract
Peripheral immune regulation is critical for the maintenance of self-tolerance. Here we have investigated signaling processes that distinguish T cells with regulatory capability from effector T cells. The murine Tg4 T cell receptor recognizes a peptide derived from the self-antigen myelin basic protein. T cells from Tg4 T cell receptor transgenic mice can be used to generate effector T cells and three types of T cells with regulatory capability, inducible regulatory T cells, T cells tolerized by repeated in vivo antigenic peptide exposure or T cells treated with the tolerogenic drug UCB9608 (a phosphatidylinositol 4 kinase IIIβ inhibitor). We comparatively studied signaling in all of these T cells by activating them with the same antigen presenting cells presenting the same myelin basic protein peptide. Supramolecular signaling structures, as efficiently detected by large-scale live cell imaging, are critical mediators of T cell activation. The formation of a supramolecular signaling complex anchored by the adaptor protein linker for activation of T cells (LAT) was consistently terminated more rapidly in Tg4 T cells with regulatory capability. Such termination could be partially reversed by blocking the inhibitory receptors CTLA-4 and PD-1. Our work suggests that attenuation of proximal signaling may favor regulatory over effector function in T cells.
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Affiliation(s)
- Yikui Li
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
| | - Helen M Tunbridge
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
| | - Graham J Britton
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
- Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Elaine V Hill
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
| | - Parisa Sinai
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
| | - Silvia Cirillo
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
| | | | | | - Simon J Dovedi
- R&D Oncology, AstraZeneca, Granta Park, Cambridge, CB21 6GH, UK
| | - David C Wraith
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, B15 2TT, UK
| | - Christoph Wülfing
- School of Cellular and Molecular Medicine, University of Bristol, Bristol, BS8 1TD, UK
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21
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The role of regulatory T cells in the pathogenesis and treatment of prostate cancer. Life Sci 2021; 284:119132. [PMID: 33513396 DOI: 10.1016/j.lfs.2021.119132] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/10/2021] [Accepted: 01/18/2021] [Indexed: 02/07/2023]
Abstract
Despite developments in the treatment of various cancers, prostate cancer is one of the deadliest diseases known to men. Systemic therapies such as androgen deprivation, chemotherapy, and radiation therapy have not been very successful in treating this disease. Numerous studies have shown that there is a direct relationship between cancer progression and inhibition of anti-tumor immune responses that can lead to progression of various malignancies, including prostate cancer. Interestingly, CD4+CD25+FoxP3+ regulatory T cells significantly accumulate and increase in draining lymph nodes and PBMCs of patients with prostate cancer and other solid tumors. In vivo and in vitro studies have shown that Tregs can suppress anti-tumor responses, which is directly related to the increased risk of cancer recurrence. Tregs are essential for preserving self-tolerance and inhibiting extra immune responses harmful to the host. Since the tumor-related antigens are mainly self-antigens, Tregs could play a major role in tumor progression. Accordingly, it has discovered that prostate cancer patients with higher Tregs have poor prognosis and low survival rates. However, anti-tumor responses can be reinforced by suppression of Tregs with using monoclonal antibodies against CD25 and CTLA-4. Therefore, depleting Tregs or suppressing their functions could be one of the effective ways for prostate cancer immunotherapy. The purpose of this review is to investigate the role of Treg cells in the progression of prostate cancer and to evaluate effective strategies for the treatment of prostate cancer by regulating Treg cells.
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22
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Hayes ET, Hagan CE, Khoryati L, Gavin MA, Campbell DJ. Regulatory T Cells Maintain Selective Access to IL-2 and Immune Homeostasis despite Substantially Reduced CD25 Function. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2020; 205:2667-2678. [PMID: 33055282 PMCID: PMC7657993 DOI: 10.4049/jimmunol.1901520] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Accepted: 09/12/2020] [Indexed: 11/19/2022]
Abstract
IL-2 is a critical regulator of immune homeostasis through its impact on both regulatory T (Treg) and effector T cells. However, the precise role of IL-2 in the maintenance and function of Treg cells in the adult peripheral immune system remains unclear. In this study, we report that neutralization of IL-2 in mice abrogated all IL-2R signaling in Treg cells, but was well tolerated and only gradually impacted Treg cell function and immune homeostasis. By contrast, despite substantially reduced IL-2 sensitivity, Treg cells maintained selective IL-2 signaling and prevented immune dysregulation following treatment with the inhibitory anti-CD25 Ab PC61. Reduction of Treg cells with a depleting version of the same CD25 Ab permitted CD8+ effector T cell proliferation before progressing to more widespread immune dysregulation. Thus, despite severely curtailed CD25 expression and function, Treg cells retain selective access to IL-2 that supports their anti-inflammatory functions in vivo. Ab-mediated targeting of CD25 is being actively pursued for treatment of autoimmune disease and prevention of allograft rejection, and our findings help inform therapeutic manipulation and design for optimal patient outcomes.
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Affiliation(s)
- Erika T Hayes
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101; and
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98195
| | - Cassidy E Hagan
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101; and
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98195
| | - Liliane Khoryati
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101; and
| | - Marc A Gavin
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101; and
| | - Daniel J Campbell
- Immunology Program, Benaroya Research Institute, Seattle, WA 98101; and
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98195
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23
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Miao Y, He L, Qi X, Lin X. Injecting Immunosuppressive M2 Macrophages Alleviates the Symptoms of Periodontitis in Mice. Front Mol Biosci 2020; 7:603817. [PMID: 33195441 PMCID: PMC7645063 DOI: 10.3389/fmolb.2020.603817] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Accepted: 10/05/2020] [Indexed: 12/11/2022] Open
Abstract
Periodontitis is the second most common oral disease affecting tooth-supporting structures. The tissue damage is mainly initiated by the excessive secretion of proinflammatory cytokines by immune cells. Macrophages are a type of antigen-presenting cells that influence the adaptive immunity function. We used a unique set of cytokines, i.e., a combination of IL-4, IL-13, and IL-10, to stimulate macrophages into a subset of M2 polarization cells that express much higher levels of ARG-1, CD206, and PDL-2 genes. The cells’ anti-inflammatory potential was tested with mixed-lymphocyte reaction assay, which showed that this subset of macrophages could increase IL-2 secretion and suppress IL-17, IL-6, and TNF-α secretion by splenocytes. The gram-negative bacterial species Porphyromonas gingivalis was used to initiate an inflammatory process in murine periodontal tissues. In the meantime, cell injection therapy was used to dampen the excessive immune reaction and suppress osteoclast differentiation during periodontitis. Maxilla was collected and analyzed for osteoclast formation. The results indicated that mice in the cell injection group exhibited less osteoclast activity within the periodontal ligament region than in the periodontitis group. Moreover, the injection of M2 macrophages sustained the regulatory population ratio. Therefore, the M2 macrophages induced under the stimulation of IL-4, IL-13, and IL-10 combined had tremendous immune modulation ability. Injecting these cells into local periodontal tissue could effectively alleviate the symptom of periodontitis.
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Affiliation(s)
- Yibin Miao
- Department of Stomatology, Shengjing Hospital of China Medical University, Liaoning, China
| | - Liuting He
- Department of Stomatology, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen, China
| | - Xiaoyu Qi
- Shenyang Medical College, Liaoning, China
| | - Xiaoping Lin
- Department of Stomatology, Shengjing Hospital of China Medical University, Liaoning, China
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Increased Serum Interleukin-2 Levels Are Associated with Abnormal Peripheral Blood Natural Killer Cell Levels in Patients with Active Rheumatoid Arthritis. Mediators Inflamm 2020; 2020:6108342. [PMID: 33013198 PMCID: PMC7512106 DOI: 10.1155/2020/6108342] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2020] [Revised: 06/30/2020] [Accepted: 08/24/2020] [Indexed: 12/29/2022] Open
Abstract
Objective To investigate the relationship between serum interleukin-2 (IL-2) levels and disease activity, absolute numbers of peripheral lymphocyte subsets, autoantibodies, and associated cytokines in patients with rheumatoid arthritis (RA). Methods This study included 106 patients with RA, evaluated their disease activity (DAS28 score), and divided them into disease remission (DAS28 ≤ 2.6), low disease activity (DAS28 ≤ 3.2), and moderate-high disease activity (DAS28 > 3.2) groups. Flow cytometry was used to detect the absolute numbers of peripheral lymphocyte subpopulations and CD4+ T cell subsets in each group, and serum cytokine levels were measured using cytometric bead array. Results Serum IL-2 levels in RA patients were positively correlated with disease activity and rheumatoid factor titers (p < 0.001 and p = 0.045, respectively), and multiple regression analysis revealed that serum IL-2 levels were an independent factor affecting disease activity. Serum IL-2 levels were positively correlated with Th17/Treg ratios (p = 0.013). Compared with the remission group, peripheral lymphocyte and CD4+ T lymphocyte subsets in patients with active RA decreased to varying degrees; however, the numbers of peripheral natural killer (NK) cells were significantly higher in the moderate-high disease activity group than in the remission (p = 0.046) and low disease activity (p = 0.020) groups; the percentages of NK cells had the same trend. In addition, the number and percentage of NK cells were positively correlated with serum IL-2 levels (p = 0.018 and p = 0.006, respectively). Conclusions In RA patients, serum IL-2 levels were not only correlated with patients' disease activity and autoantibody levels but were also involved in their Th17/Treg immune imbalance. In addition, in patients with active RA, NK cell levels were abnormally elevated, possibly due to high serum levels of IL-2.
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Usharauli D, Kamala T. Could cross-reactivity rescue Foxp3+ regulatory T cell precursors from thymic deletion? Scand J Immunol 2020; 93:e12940. [PMID: 32776320 DOI: 10.1111/sji.12940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Revised: 07/06/2020] [Accepted: 07/17/2020] [Indexed: 11/28/2022]
Abstract
Thymocytes that bind with high affinity to peptides displayed by MHC class II (pMHC-II) are deleted while low-affinity binders differentiate into naive CD4+ T cells. However, Foxp3+ regulatory T cells (Tregs) seem to defy this binary choice as their precursors require high-affinity interaction with pMHC-II for maturation in the thymus. Here, we rely on the antigen-specific interpretive framework, SPIRAL (Specific ImmunoRegulatory Algorithm), to propose that Tregs escape thymic deletion by forming dyads with IL-2-producing T cells via antigen cross-reactivity. This interpretation reconciles contradictions related to Treg ontogeny in the thymus and their role in modulating antigen-specific immune responses.
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Functional analysis of clinical response to low-dose IL-2 in patients with refractory chronic graft-versus-host disease. Blood Adv 2020; 3:984-994. [PMID: 30936059 DOI: 10.1182/bloodadvances.2018027474] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Accepted: 02/19/2019] [Indexed: 12/13/2022] Open
Abstract
Patients with chronic graft-versus-host disease (cGVHD) have a paucity of regulatory CD4 T cells (CD4Tregs) that mediate peripheral tolerance. In clinical trials, daily low-dose interleukin-2 (IL-2) has been administered safely for prolonged periods in patients with steroid-refractory cGVHD. Peripheral CD4Tregs expand dramatically in all patients during IL-2 therapy but clinical improvement was observed in ∼50% of patients. Here, we examined the impact of low-dose IL-2 therapy on functional T-cell markers and the T-cell repertoire within CD4Tregs, conventional CD4 T cells (CD4Tcons), and CD8+ T cells. IL-2 had profound effects on CD4Tregs homeostasis in both response groups including selective expansion of the naive subset, improved thymic output, and increased expression of Ki67, FOXP3, and B-cell lymphoma 2 within CD4Tregs. Similar changes were not seen in CD4Tcons or CD8 T cells. Functionally, low-dose IL-2 enhanced, in vitro, CD4Treg-suppressive activity in both response groups, and all patient CD4Tcons were similarly suppressed by healthy donor CD4Tregs. High-throughput sequencing of the T-cell receptor β (TCRβ) locus demonstrated that low-dose IL-2 therapy increased TCR repertoire diversity and decreased evenness within CD4Tregs without affecting CD4Tcons or CD8 T cells. Using clone-tracking analysis, we observed rapid turnover of highly prevalent clones in CD4Tregs as well as the conversion of CD4Tcons to CD4Tregs. After 12 weeks of daily IL-2, clinical responders had a greater influx of novel clones within the CD4Treg compartment compared with nonresponders. Further studies to define the function and specificity of these novel CD4Treg clones may help establish the mechanisms whereby low-dose IL-2 therapy promotes immune tolerance.
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27
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Effect of Timing and Complement Receptor Antagonism on Intragraft Recruitment and Protolerogenic Effects of Mesenchymal Stromal Cells in Murine Kidney Transplantation. Transplantation 2020; 103:1121-1130. [PMID: 30801518 DOI: 10.1097/tp.0000000000002611] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
BACKGROUND Mesenchymal stromal cells (MSCs) have protolerogenic effects in renal transplantation, but they induce long-term regulatory T cells (Treg)-dependent graft acceptance only when infused before transplantation. When given posttransplant, MSCs home to the graft where they promote engraftment syndrome and do not induce Treg. Unfortunately, pretransplant MSC administration is unfeasible in deceased-donor kidney transplantation. METHODS To make MSCs a therapeutic option also for deceased organ recipients, we tested whether MSC infusion at the time of transplant (day 0) or posttransplant (day 2) together with inhibition of complement receptors prevents engraftment syndrome and allows their homing to secondary lymphoid organs for promoting tolerance. We analyzed intragraft and splenic MSC localization, graft survival, and alloimmune response in mice recipients of kidney allografts and syngeneic MSCs given on day 0 or on posttransplant day 2. C3a receptor (C3aR) or C5a receptor (C5aR) antagonists were administered to mice in combination with the cells or were used together to treat MSCs before infusion. RESULTS Syngeneic MSCs given at day 0 homed to the spleen increased Treg numbers and induced long-term graft acceptance. Posttransplant MSC infusion, combined with a short course of C3aR or C5aR antagonist or administration of MSCs pretreated with C3aR and C5aR antagonists, prevented intragraft recruitment of MSCs and graft inflammation, inhibited antidonor T-cell reactivity, but failed to induce Treg, resulting in mild prolongation of graft survival. CONCLUSIONS These data support testing the safety/efficacy profile of administering MSCs on the day of transplant in deceased-donor transplant recipients and indicate that complement is crucial for MSC recruitment into the kidney allograft.
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Uhl LFK, Gérard A. Modes of Communication between T Cells and Relevance for Immune Responses. Int J Mol Sci 2020; 21:E2674. [PMID: 32290500 PMCID: PMC7215318 DOI: 10.3390/ijms21082674] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2020] [Revised: 04/08/2020] [Accepted: 04/10/2020] [Indexed: 11/16/2022] Open
Abstract
T cells are essential mediators of the adaptive immune system, which constantly patrol the body in search for invading pathogens. During an infection, T cells that recognise the pathogen are recruited, expand and differentiate into subtypes tailored to the infection. In addition, they differentiate into subsets required for short and long-term control of the pathogen, i.e., effector or memory. T cells have a remarkable degree of plasticity and heterogeneity in their response, however, their overall response to a given infection is consistent and robust. Much research has focused on how individual T cells are activated and programmed. However, in order to achieve a critical level of population-wide reproducibility and robustness, neighbouring cells and surrounding tissues have to provide or amplify relevant signals to tune the overall response accordingly. The characteristics of the immune response-stochastic on the individual cell level, robust on the global level-necessitate coordinated responses on a system-wide level, which facilitates the control of pathogens, while maintaining self-tolerance. This global coordination can only be achieved by constant cellular communication between responding cells, and faults in this intercellular crosstalk can potentially lead to immunopathology or autoimmunity. In this review, we will discuss how T cells mount a global, collective response, by describing the modes of T cell-T cell (T-T) communication they use and highlighting their physiological relevance in programming and controlling the T cell response.
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Affiliation(s)
| | - Audrey Gérard
- The Kennedy Institute of Rheumatology, University of Oxford, Oxford OX3 7FY, UK;
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29
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Tan X, Chen Q, Zhu H, Zhu S, Gong Y, Wu X, Chen YC, Li X, Li MWH, Liu W, Fan X. Fast and Reproducible ELISA Laser Platform for Ultrasensitive Protein Quantification. ACS Sens 2020; 5:110-117. [PMID: 31829015 DOI: 10.1021/acssensors.9b01795] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Optofluidic lasers are currently of high interest for sensitive intracavity biochemical analysis. In comparison with conventional methods such as fluorescence and colorimetric detection, optofluidic lasers provide a method for amplifying small concentration differences in the gain medium, thus achieving high sensitivity. Here, we report the development of an on-chip ELISA (enzyme-linked immunosorbent assay) laser platform that is able to complete an assay in a short amount of time with small sample/reagent volumes, large dynamic range, and high sensitivity. The arrayed microscale reaction wells in the ELISA lasers can be microfabricated directly on dielectric mirrors, thus significantly improving the quality of the reaction wells and detection reproducibility. The details of the fabrication and characterization of those reaction wells on the mirror are described and the ELISA laser assay protocols are developed. Finally, we applied the ELISA laser to detecting IL-6, showing that a detection limit of about 0.1 pg/mL can be achieved in 1.5 h with 15 μL of sample/reagents per well. This work pushes the ELISA laser a step closer to solving problems in real-world biochemical analysis.
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Affiliation(s)
- Xiaotian Tan
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, Michigan 48109, United States
| | - Qiushu Chen
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, Michigan 48109, United States
| | - Hongbo Zhu
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, Michigan 48109, United States
| | - Song Zhu
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, Michigan 48109, United States
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Yuan Gong
- Key Laboratory of Optical Fiber Sensing and Communications, University of Electronic Science and Technology of China, No. 2006, Xiyuan Avenue, Chengdu 611731, P. R. China
| | - Xiaoqin Wu
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, Michigan 48109, United States
| | - Yu-Cheng Chen
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, Michigan 48109, United States
- School of Electrical and Electronics Engineering, Nanyang Technological University, 50 Nanyang Avenue, 639798 Singapore, Singapore
| | - Xuzhou Li
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, Michigan 48109, United States
| | - Maxwell Wei-Hao Li
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, Michigan 48109, United States
| | - Wenyi Liu
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, Michigan 48109, United States
| | - Xudong Fan
- Department of Biomedical Engineering, University of Michigan, 1101 Beal Avenue, Ann Arbor, Michigan 48109, United States
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30
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Spolski R, Li P, Leonard WJ. Biology and regulation of IL-2: from molecular mechanisms to human therapy. Nat Rev Immunol 2019; 18:648-659. [PMID: 30089912 DOI: 10.1038/s41577-018-0046-y] [Citation(s) in RCA: 333] [Impact Index Per Article: 66.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
IL-2 was first identified as a growth factor capable of driving the expansion of activated human T cell populations. In the more than 40 years since its discovery, a tremendous amount has been learned regarding the mechanisms that regulate the expression of both IL-2 and its cell surface receptor, its mechanisms of signalling and its range of biological actions. More recently, the mechanisms by which IL-2 regulates CD4+ T cell differentiation and function have been elucidated. IL-2 also regulates the effector and memory responses of CD8+ T cells, and the loss of IL-2 or responsiveness to IL-2 at least in part explains the exhausted phenotype that occurs during chronic viral infections and in tumour responses. These basic mechanistic studies have led to the therapeutic ability to manipulate the action of IL-2 on regulatory T (Treg) cells for the treatment of autoimmune disease and on CD8+ T cells for immunotherapy of cancer. IL-2 can have either positive or deleterious effects, and we discuss here recent ideas and approaches for manipulating the actions and overall net effects of IL-2 in disease settings, including cancer.
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Affiliation(s)
- Rosanne Spolski
- Laboratory of Molecular Immunology and The Immunology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Peng Li
- Laboratory of Molecular Immunology and The Immunology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Warren J Leonard
- Laboratory of Molecular Immunology and The Immunology Center, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA.
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31
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Policheni A, Horikawa K, Milla L, Kofler J, Bouillet P, Belz GT, O'Reilly LA, Goodnow CC, Strasser A, Gray DHD. CARD11 is dispensable for homeostatic responses and suppressive activity of peripherally induced FOXP3
+
regulatory T cells. Immunol Cell Biol 2019; 97:740-752. [DOI: 10.1111/imcb.12268] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 05/12/2019] [Accepted: 05/13/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Antonia Policheni
- The Walter and Eliza Hall Institute of Medical Research Melbourne VIC Australia
- Department of Medical Biology The University of Melbourne Melbourne VIC Australia
| | - Keisuke Horikawa
- Australian Cancer Research Foundation Department of Cancer Biology and Therapeutics The John Curtin School of Medical Research The Australian National University Canberra ACT Australia
| | - Liz Milla
- The Walter and Eliza Hall Institute of Medical Research Melbourne VIC Australia
- Department of Medical Biology The University of Melbourne Melbourne VIC Australia
| | - Jennifer Kofler
- Australian Cancer Research Foundation Department of Cancer Biology and Therapeutics The John Curtin School of Medical Research The Australian National University Canberra ACT Australia
| | - Philippe Bouillet
- The Walter and Eliza Hall Institute of Medical Research Melbourne VIC Australia
- Department of Medical Biology The University of Melbourne Melbourne VIC Australia
| | - Gabrielle T Belz
- The Walter and Eliza Hall Institute of Medical Research Melbourne VIC Australia
- Department of Medical Biology The University of Melbourne Melbourne VIC Australia
| | - Lorraine A O'Reilly
- The Walter and Eliza Hall Institute of Medical Research Melbourne VIC Australia
- Department of Medical Biology The University of Melbourne Melbourne VIC Australia
| | | | - Andreas Strasser
- The Walter and Eliza Hall Institute of Medical Research Melbourne VIC Australia
- Department of Medical Biology The University of Melbourne Melbourne VIC Australia
| | - Daniel HD Gray
- The Walter and Eliza Hall Institute of Medical Research Melbourne VIC Australia
- Department of Medical Biology The University of Melbourne Melbourne VIC Australia
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32
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Podestà MA, Remuzzi G, Casiraghi F. Mesenchymal Stromal Cells for Transplant Tolerance. Front Immunol 2019; 10:1287. [PMID: 31231393 PMCID: PMC6559333 DOI: 10.3389/fimmu.2019.01287] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 05/21/2019] [Indexed: 12/18/2022] Open
Abstract
In solid organ transplantation lifelong immunosuppression exposes transplant recipients to life-threatening complications, such as infections and malignancies, and to severe side effects. Cellular therapy with mesenchymal stromal cells (MSC) has recently emerged as a promising strategy to regulate anti-donor immune responses, allowing immunosuppressive drug minimization and tolerance induction. In this review we summarize preclinical data on MSC in solid organ transplant models, focusing on potential mechanisms of action of MSC, including down-regulation of effector T-cell response and activation of regulatory pathways. We will also provide an overview of available data on safety and feasibility of MSC therapy in solid organ transplant patients, highlighting the issues that still need to be addressed before establishing MSC as a safe and effective tolerogenic cell therapy in transplantation.
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Affiliation(s)
- Manuel Alfredo Podestà
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy.,Department of Health Sciences, Università degli Studi di Milano, Milan, Italy
| | - Giuseppe Remuzzi
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
| | - Federica Casiraghi
- Department of Molecular Medicine, Istituto di Ricerche Farmacologiche Mario Negri IRCCS, Bergamo, Italy
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33
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Antonioli L, Blandizzi C, Pacher P, Guilliams M, Haskó G. Rethinking Communication in the Immune System: The Quorum Sensing Concept. Trends Immunol 2019; 40:88-97. [PMID: 30611647 DOI: 10.1016/j.it.2018.12.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 11/15/2018] [Accepted: 12/11/2018] [Indexed: 12/13/2022]
Abstract
Quorum sensing was first described as the communication process bacteria employ to coordinate changes in gene expression and therefore, their collective behavior in response to population density. Emerging new evidence suggests that quorum sensing can also contribute to the regulation of immune cell responses. Quorum sensing might be achieved by the ability of immune cells to perceive the density of their own populations or those of other cells in their environment; responses to alterations in cell density might then be coordinated via changes in gene expression and protein signaling. Quorum sensing mechanisms can regulate T and B cell as well as macrophage function. We posit that perturbations in quorum sensing may undermine the balance between diverse immune cell populations and predispose the host to immune abnormalities.
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Affiliation(s)
- Luca Antonioli
- Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy; Department of Anesthesiology, Columbia University, New York, NY 10032, USA
| | - Corrado Blandizzi
- Department of Clinical and Experimental Medicine, University of Pisa, 56126 Pisa, Italy
| | - Pál Pacher
- Laboratory of Cardiovascular Physiology and Tissue Injury, National Institutes of Health/NIAAA, Bethesda, MD 20892, USA
| | - Martin Guilliams
- Laboratory of Myeloid Cell Ontogeny and Functional Specialization, VIB Center for Inflammation Research, Technologiepark 927, Ghent, Belgium; Department of Biomedical Molecular Biology, Ghent University, Ghent, Belgium
| | - György Haskó
- Department of Anesthesiology, Columbia University, New York, NY 10032, USA.
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Baens M, Stirparo R, Lampi Y, Verbeke D, Vandepoel R, Cools J, Marynen P, de Bock CE, Bornschein S. Malt1 self-cleavage is critical for regulatory T cell homeostasis and anti-tumor immunity in mice. Eur J Immunol 2018; 48:1728-1738. [PMID: 30025160 PMCID: PMC6220888 DOI: 10.1002/eji.201847597] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Revised: 06/04/2018] [Accepted: 07/13/2018] [Indexed: 12/31/2022]
Abstract
Mucosa-associated lymphoid tissue 1 (Malt1) regulates immune cell function by mediating the activation of nuclear factor κB (NF-κB) signaling through both its adaptor and proteolytic function. Malt1 is also a target of its own protease activity and this self-cleavage further contributes to NF-κB activity. Until now, the functional distinction between Malt1 self-cleavage and its general protease function in regulating NF-κB signaling and immune activation remained unclear. Here we demonstrate, using a new mouse model, the importance of Malt1 self-cleavage in regulating expression of NF-κB target genes and subsequent T cell activation. Significantly, we further establish that Treg homeostasis is critically linked to Malt1 function via a Treg intrinsic and extrinsic mechanism. TCR-mediated Malt1 proteolytic activity and self-cleavage was found to drive Il2 expression in conventional CD4+ T cells, thereby regulating Il2 availability for Treg homeostasis. Remarkably, the loss of Malt1-mediated self-cleavage alone was sufficient to cause a significant Treg deficit resulting in increased anti-tumor immune reactivity without associated autoimmunity complications. These results establish for the first time that inhibition of MALT1 proteolytic activity could be a viable therapeutic strategy to augment anti-tumor immunity.
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Affiliation(s)
- Mathijs Baens
- KU Leuven Department of Human GeneticsLeuvenBelgium
- VIB Center for Brain & Disease ResearchLeuvenBelgium
- Cistim Leuven vzwLeuvenBelgium
| | - Rocco Stirparo
- KU Leuven Department of Human GeneticsLeuvenBelgium
- VIB Center for Cancer BiologyLeuvenBelgium
| | - Youlia Lampi
- Switch LaboratoryVIBLeuvenBelgium
- KU Leuven Department for Cellular and MolecularLeuvenBelgium
| | - Delphine Verbeke
- KU Leuven Department of Human GeneticsLeuvenBelgium
- VIB Center for Cancer BiologyLeuvenBelgium
| | - Roel Vandepoel
- KU Leuven Department of Human GeneticsLeuvenBelgium
- VIB Center for Cancer BiologyLeuvenBelgium
| | - Jan Cools
- KU Leuven Department of Human GeneticsLeuvenBelgium
- VIB Center for Cancer BiologyLeuvenBelgium
| | | | - Charles E. de Bock
- KU Leuven Department of Human GeneticsLeuvenBelgium
- VIB Center for Cancer BiologyLeuvenBelgium
| | - Simon Bornschein
- KU Leuven Department of Human GeneticsLeuvenBelgium
- VIB Center for Cancer BiologyLeuvenBelgium
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35
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Taylor ES, McCall JL, Shen S, Girardin A, Munro FM, Black MA, Ward-Hartstonge KA, Kemp RA. Prognostic roles for IL-2-producing and CD69 + T cell subsets in colorectal cancer patients. Int J Cancer 2018; 143:2008-2016. [PMID: 29752720 DOI: 10.1002/ijc.31598] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 03/08/2018] [Accepted: 04/17/2018] [Indexed: 01/30/2023]
Abstract
Tumor infiltrating T cells are a predictor of patient outcome in patients with colorectal cancer (CRC). However, many T cell populations have been associated with both poor and positive patient prognoses, indicating a need to further understand the role of different T cell subsets in CRC. In this study, the T cell infiltrate from the tumor and nontumor bowel (NTB) was examined in 95 CRC patients using flow cytometry and associations with cancer stage and disease recurrence made. Our findings showed that IFN-γ-producing T cells were associated with positive patient outcomes, and CD69+ T cells were associated with disease recurrence. Inflammatory (IL-17) and regulatory T cells were not associated with disease recurrence. Surprisingly, in a second cohort of 32 patients with long-term clinical follow up data, tumor infiltrating IL-2-producing T cells correlated negatively with disease free survival (DFS) and a higher frequency of IL-2-producing T cells was found in the NTB of patients with poorly differentiated tumors. These results point toward the possibility of a negative impact of IL-2 in tumor immune responses, which may influence future immunotherapy treatments in CRC patients.
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Affiliation(s)
- Edward S Taylor
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - John L McCall
- Department of Surgical Sciences, University of Otago, Dunedin, New Zealand
| | - Shirley Shen
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Adam Girardin
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
| | - Fran M Munro
- Department of Surgical Sciences, University of Otago, Dunedin, New Zealand
| | - Michael A Black
- Department of Biochemistry, University of Otago, Dunedin, New Zealand
| | | | - Roslyn A Kemp
- Department of Microbiology and Immunology, University of Otago, Dunedin, New Zealand
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36
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Schwarz C, Mahr B, Muckenhuber M, Wekerle T. Belatacept/CTLA4Ig: an update and critical appraisal of preclinical and clinical results. Expert Rev Clin Immunol 2018; 14:583-592. [PMID: 29874474 DOI: 10.1080/1744666x.2018.1485489] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
INTRODUCTION The B7/CD28/CTLA4 signaling cascade is the most thoroughly studied costimulatory pathway and blockade with CTLA4Ig (abatacept) or its derivative belatacept has emerged as a valuable option for pharmacologic immune modulation. Several clinical studies have ultimately led to the approval of belatacept for immunosuppression in kidney transplant recipients. Areas covered: This review will discuss the immunological background of costimulation blockade and recent preclinical data and clinical results of CTLA4Ig/belatacept. Expert commentary: The development of belatacept is a major advance in clinical transplantation. However, in spite of promising results in preclinical and clinical trials, clinical use remains limited at present, in part due to increased rates of acute rejection. Recent efforts showing encouraging progress in refining such protocols might be a step toward harnessing the full potential of costimulation blockade-based immunosuppression.
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Affiliation(s)
- Christoph Schwarz
- a Division of General Surgery, Department of Surgery , Medical University of Vienna , Vienna , Austria.,b Section of Transplantation Immunology, Department of Surgery , Medical University of Vienna , Vienna , Austria
| | - Benedikt Mahr
- b Section of Transplantation Immunology, Department of Surgery , Medical University of Vienna , Vienna , Austria
| | - Moritz Muckenhuber
- b Section of Transplantation Immunology, Department of Surgery , Medical University of Vienna , Vienna , Austria
| | - Thomas Wekerle
- b Section of Transplantation Immunology, Department of Surgery , Medical University of Vienna , Vienna , Austria
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Tabrizi M, Zhang D, Ganti V, Azadi G. Integrative Pharmacology: Advancing Development of Effective Immunotherapies. AAPS JOURNAL 2018; 20:66. [PMID: 29704129 DOI: 10.1208/s12248-018-0229-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Accepted: 04/13/2018] [Indexed: 12/29/2022]
Abstract
With the recent advances in cancer immunotherapy, it is now evident that the antigen-specific activation of the patients' immune responses can be utilized for achieving significant therapeutic benefits. Novel molecules have been developed and promising advances have been achieved in cancer therapy. The recent success of cancer immunotherapy clearly reflects the novelty of the approach and importance of this class of therapeutics. Due to the nature of immunotherapy, i.e., harnessing the patient's immune system, it becomes critical to evaluate the important variables that can guide preclinical development, translational strategies, patient selection, and effective clinical dosing paradigms following single and combination therapies. To further boost the durability and efficacy profiles of IO (immuno-oncology) drugs following single agent therapy, novel combination therapies are being sought. Combination strategies have become critical for enhancing the anti-tumor immunity in broader cancer indications. Comprehensive methods are being developed to quantify the synergistic combination effect profiles at various development phases. Further evaluation of the signaling and pathway components can potentially establish a unique "signature" characteristic for specific combination therapies following modulation of various immunomodulatory pathways. In this article, critical topics related to preclinical, translational, and clinical development of IO agents are discussed.
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Calcineurin-mediated IL-2 production by CD11c highMHCII + myeloid cells is crucial for intestinal immune homeostasis. Nat Commun 2018; 9:1102. [PMID: 29549257 PMCID: PMC5856784 DOI: 10.1038/s41467-018-03495-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Accepted: 02/19/2018] [Indexed: 12/31/2022] Open
Abstract
The intestinal immune system can respond to invading pathogens yet maintain immune tolerance to self-antigens and microbiota. Myeloid cells are central to these processes, but the signaling pathways that underlie tolerance versus inflammation are unclear. Here we show that mice lacking Calcineurin B in CD11chighMHCII+ cells (Cnb1CD11c mice) spontaneously develop intestinal inflammation and are susceptible to induced colitis. In these mice, colitis is associated with expansion of T helper type 1 (Th1) and Th17 cell populations and a decrease in the number of FoxP3+ regulatory T (Treg) cells, and the pathology is linked to the inability of intestinal Cnb1-deficient CD11chighMHCII+ cells to express IL-2. Deleting IL-2 in CD11chighMHCII+ cells induces spontaneous colitis resembling human inflammatory bowel disease. Our findings identify that the calcineurin–NFAT–IL-2 pathway in myeloid cells is a critical regulator of intestinal homeostasis by influencing the balance of inflammatory and regulatory responses in the mouse intestine. Treg cells can maintain intestinal homeostasis and limit intestinal bowel disease. Here the authors use a mouse model of spontaneous colitis to show that calcineurin-NFAT-induced IL-2 production by dendritic cells regulates the balance between Treg and effector T cells in the gut lamina propria.
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39
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Natural variation in the parameters of innate immune cells is preferentially driven by genetic factors. Nat Immunol 2018; 19:302-314. [PMID: 29476184 DOI: 10.1038/s41590-018-0049-7] [Citation(s) in RCA: 162] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 01/12/2018] [Indexed: 12/21/2022]
Abstract
The quantification and characterization of circulating immune cells provide key indicators of human health and disease. To identify the relative effects of environmental and genetic factors on variation in the parameters of innate and adaptive immune cells in homeostatic conditions, we combined standardized flow cytometry of blood leukocytes and genome-wide DNA genotyping of 1,000 healthy, unrelated people of Western European ancestry. We found that smoking, together with age, sex and latent infection with cytomegalovirus, were the main non-genetic factors that affected variation in parameters of human immune cells. Genome-wide association studies of 166 immunophenotypes identified 15 loci that showed enrichment for disease-associated variants. Finally, we demonstrated that the parameters of innate cells were more strongly controlled by genetic variation than were those of adaptive cells, which were driven by mainly environmental exposure. Our data establish a resource that will generate new hypotheses in immunology and highlight the role of innate immunity in susceptibility to common autoimmune diseases.
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40
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Wong HS, Germain RN. Robust control of the adaptive immune system. Semin Immunol 2017; 36:17-27. [PMID: 29290544 DOI: 10.1016/j.smim.2017.12.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 12/20/2017] [Indexed: 01/07/2023]
Abstract
The adaptive immune system continually faces unpredictable circumstances yet reproducibly counteracts invading pathogens while limiting damage to self. However, the system is dynamic in nature: many of its internal components are not fixed, but rather, fluctuate over time. This concept is exemplified by αβ T lymphocytes, which vary significantly from cell-to-cell in their spatiotemporal dynamics, antigen-binding receptors, and subcellular protein concentrations. How are reproducible immune functions achieved in the face of such variability? This design principle is known as robustness and requires the system to employ layered control schemes that both buffer and exploit different facets of cellular variation. In this article, we discuss these schemes and their applications to individual αβ T cell responses as well as integrated population level behaviours.
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Affiliation(s)
- Harikesh S Wong
- Lymphocyte Biology Section, Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA.
| | - Ronald N Germain
- Lymphocyte Biology Section, Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892-1892, USA.
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41
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Li Y, Strick-Marchand H, Lim AI, Ren J, Masse-Ranson G, Dan Li, Jouvion G, Rogge L, Lucas S, Bin Li, Di Santo JP. Regulatory T cells control toxicity in a humanized model of IL-2 therapy. Nat Commun 2017; 8:1762. [PMID: 29176694 PMCID: PMC5701141 DOI: 10.1038/s41467-017-01570-9] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 09/29/2017] [Indexed: 01/10/2023] Open
Abstract
While patient selection and clinical management have reduced high-dose IL-2 (HDIL2) immunotherapy toxicities, the immune mechanisms that underlie HDIL2-induced morbidity remain unclear. Here we show that dose-dependent morbidity and mortality of IL-2 immunotherapy can be modeled in human immune system (HIS) mice. Depletion of human T cell subsets during the HDIL2 treatment reduces toxicity, pointing to the central function of T cells. Preferential expansion of effector T cells secondary to defective suppressive capacity of regulatory T (Treg) cells after HDIL2 therapy further underscores the importance of Treg in the maintenance of immune tolerance. IL-2 toxicity is induced by selective depletion or inhibition of Treg after LDIL2 therapy, and is ameliorated in HDIL2-treated HIS mice receiving the PIM-1 kinase inhibitor, Kaempferol. Modeling IL-2 pathophysiology in HIS mice offers a means to understand the functions of effector and regulatory T cells in immune-mediated toxicities associated with cancer immunotherapy.
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Affiliation(s)
- Yan Li
- Institut Pasteur, Innate Immunity Unit, Immunology Department, 75724, Paris, France
- Inserm U1223, 75724, Paris, France
| | - Helene Strick-Marchand
- Institut Pasteur, Innate Immunity Unit, Immunology Department, 75724, Paris, France
- Inserm U1223, 75724, Paris, France
| | - Ai Ing Lim
- Institut Pasteur, Innate Immunity Unit, Immunology Department, 75724, Paris, France
- Inserm U1223, 75724, Paris, France
| | - Jiazi Ren
- Key Laboratory of Molecular Virology and Immunology, CAS Center for Excellence in Molecular Cell Science, Unit of Molecular Immunology, Institut Pasteur of Shanghai, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 200025, Shanghai, China
| | - Guillemette Masse-Ranson
- Institut Pasteur, Innate Immunity Unit, Immunology Department, 75724, Paris, France
- Inserm U1223, 75724, Paris, France
| | - Dan Li
- Key Laboratory of Molecular Virology and Immunology, CAS Center for Excellence in Molecular Cell Science, Unit of Molecular Immunology, Institut Pasteur of Shanghai, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 200025, Shanghai, China
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, 200025, Shanghai, China
| | - Gregory Jouvion
- Institut Pasteur, Human Histopathology and Animal Models Unit, 75724, Paris, France
| | - Lars Rogge
- Institut Pasteur, Immunoregulation Unit, Immunology Department, 75724, Paris, France
| | - Sophie Lucas
- de Duve Institute, Université Catholique de Louvain, and WELBIO, B1200, Brussels, Belgium
| | - Bin Li
- Key Laboratory of Molecular Virology and Immunology, CAS Center for Excellence in Molecular Cell Science, Unit of Molecular Immunology, Institut Pasteur of Shanghai, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 200025, Shanghai, China
- Shanghai Institute of Immunology, Shanghai JiaoTong University School of Medicine, 200025, Shanghai, China
| | - James P Di Santo
- Institut Pasteur, Innate Immunity Unit, Immunology Department, 75724, Paris, France.
- Inserm U1223, 75724, Paris, France.
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Vitamin D 3 supplementation and the IL-2/IL-2R pathway in multiple sclerosis: Attenuation of progressive disturbances? J Neuroimmunol 2017; 314:50-57. [PMID: 29153546 DOI: 10.1016/j.jneuroim.2017.11.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 11/06/2017] [Accepted: 11/08/2017] [Indexed: 12/26/2022]
Abstract
Vitamin D3 upregulates IL-2 receptor alpha (IL2RA, CD25)-expression on CD4+ T cells in vitro. We investigated effects of 48-weeks vitamin D3 supplements on CD25-expression by CD4+ T cells of patients with multiple sclerosis (MS). There was no significant difference between the vitamin D3 (n=30) and placebo group (n=23) in IL2RA mRNA-expression by PBMC. Likewise, CD25 cell surface-expression by conventional or regulatory T cells (Treg) did not differ between groups, although Treg CD25-expression and circulating soluble-CD25 levels decreased significantly in the placebo but not vitamin D3-group. We speculate that vitamin D3 may promote the maintenance of CD25-related immune homeostasis in MS.
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Constitutive expression of NF-κB inducing kinase in regulatory T cells impairs suppressive function and promotes instability and pro-inflammatory cytokine production. Sci Rep 2017; 7:14779. [PMID: 29116141 PMCID: PMC5677020 DOI: 10.1038/s41598-017-14965-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Accepted: 10/16/2017] [Indexed: 12/22/2022] Open
Abstract
CD4+Foxp3+ regulatory T cells (Tregs) are indispensable negative regulators of immune responses. To understand Treg biology in health and disease, it is critical to elucidate factors that affect Treg homeostasis and suppressive function. Tregs express several costimulatory TNF receptor family members that activate non-canonical NF-κB via accumulation of NF-κB inducing kinase (NIK). We previously showed that constitutive NIK expression in all T cells causes fatal multi-organ autoimmunity associated with hyperactive conventional T cell responses and poor Treg-mediated suppression. Here, we show that constitutive NIK expression that is restricted to Tregs via a Cre-inducible transgene causes an autoimmune syndrome. We found that constitutive NIK expression decreased expression of numerous Treg signature genes and microRNAs involved in Treg homeostasis and suppressive phenotype. NIK transgenic Tregs competed poorly with WT Tregs in vivo and produced pro-inflammatory cytokines upon stimulation. Lineage tracing experiments revealed accumulation of ex-Foxp3+ T cells in mice expressing NIK constitutively in Tregs, and these former Tregs produced copious IFNγ and IL-2. Our data indicate that under inflammatory conditions in which NIK is activated, Tregs may lose suppressive function and may actively contribute to inflammation.
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44
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Zheng K, Fan Y, Ji R, Ma S. Distinctive effects of pilose antler on mouse peripheral blood immune cell populations. FOOD AGR IMMUNOL 2017. [DOI: 10.1080/09540105.2017.1332011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
- Kexin Zheng
- College of Food Science and Technology, Shenyang Agricultural University, Shenyang, People’s Republic of China
| | - Yudan Fan
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, People’s Republic of China
| | - Ruiqin Ji
- College of Horticulture, Shenyang Agricultural University, Shenyang, People’s Republic of China
| | - Shiliang Ma
- College of Food Science and Technology, Shenyang Agricultural University, Shenyang, People’s Republic of China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang, People’s Republic of China
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45
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Veiga-Fernandes H, Freitas AA. The S(c)ensory Immune System Theory. Trends Immunol 2017; 38:777-788. [DOI: 10.1016/j.it.2017.02.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2016] [Revised: 01/09/2017] [Accepted: 02/15/2017] [Indexed: 01/21/2023]
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46
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Döhler A, Schneider T, Eckert I, Ribechini E, Andreas N, Riemann M, Reizis B, Weih F, Lutz MB. RelB + Steady-State Migratory Dendritic Cells Control the Peripheral Pool of the Natural Foxp3 + Regulatory T Cells. Front Immunol 2017; 8:726. [PMID: 28690613 PMCID: PMC5479892 DOI: 10.3389/fimmu.2017.00726] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Accepted: 06/08/2017] [Indexed: 11/18/2022] Open
Abstract
Thymus-derived natural Foxp3+ CD4+ regulatory T cells (nTregs) play a key role in maintaining immune tolerance and preventing autoimmune disease. Several studies indicate that dendritic cells (DCs) are critically involved in the maintenance and proliferation of nTregs. However, the mechanisms how DCs manage to keep the peripheral pool at constant levels remain poorly understood. Here, we describe that the NF-κB/Rel family transcription factor RelB controls the frequencies of steady-state migratory DCs (ssmDCs) in peripheral lymph nodes and their numbers control peripheral nTreg homeostasis. DC-specific RelB depletion was investigated in CD11c-Cre × RelBfl/fl mice (RelBDCko), which showed normal frequencies of resident DCs in lymph nodes and spleen while the subsets of CD103− Langerin− dermal DCs (dDCs) and Langerhans cells but not CD103+ Langerin+ dDC of the ssmDCs in skin-draining lymph nodes were increased. Enhanced frequencies and proliferation rates were also observed for nTregs and a small population of CD4+ CD44high CD25low memory-like T cells (Tml). Interestingly, only the Tml but not DCs showed an increase in IL-2-producing capacity in lymph nodes of RelBDCko mice. Blocking of IL-2 in vivo reduced the frequency of nTregs but increased the Tml frequencies, followed by a recovery of nTregs. Taken together, by employing RelBDCko mice with increased frequencies of ssmDCs our data indicate a critical role for specific ssmDC subsets for the peripheral nTreg and IL-2+ Tml frequencies during homeostasis.
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Affiliation(s)
- Anja Döhler
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Theresa Schneider
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Ina Eckert
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Eliana Ribechini
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
| | - Nico Andreas
- Leibniz Institute on Aging - Fritz Lipmann Institute, Jena, Germany
| | - Marc Riemann
- Leibniz Institute on Aging - Fritz Lipmann Institute, Jena, Germany
| | - Boris Reizis
- Department of Pathology, Department of Medicine, NYU Langone Medical Center, New York, NY, United States
| | - Falk Weih
- Leibniz Institute on Aging - Fritz Lipmann Institute, Jena, Germany
| | - Manfred B Lutz
- Institute for Virology and Immunobiology, University of Würzburg, Würzburg, Germany
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47
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Comparison of Cytokine and Efflux Transporter Expression in Pediatric Versus Adult-onset Ulcerative Colitis. J Pediatr Gastroenterol Nutr 2017; 64:943-948. [PMID: 27622899 DOI: 10.1097/mpg.0000000000001403] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVES Ulcerative colitis (UC), a chronic inflammation of the colon, is often more severe in children than adults. Identification of altered expression of efflux transporters, cytokines, and suppressor of cytokine signaling (SOCS) molecules in pediatric versus adult patients could provide insight into the differential molecular patterns related to the age and disease pathology. METHODS Mucosal samples from terminal ileum and colon in pediatric (9 UC-New, 4 UC-Remission) and adult (9 UC-New, 8 UC-Remission) patients were compared with healthy subjects (15 children and 10 adults) for mRNA expressions of several efflux transporters, cytokines, and SOCS molecules. RESULTS The inflamed colon interleukin (IL)-6, IL-17A, and interferon-γ levels were elevated in UC-New subgroups but close to control values in UC-Remission. IL-1β expression was increased only in UC-New children. Interestingly, uninflamed ileum also showed increased IL-6 and IL-1β levels in UC-New subgroups. SOCS1/SOCS3 expression pattern followed a trend observed for inflammatory cytokines only in children. Both children and adults had decreased multidrug resistance protein 1 expression in colon, which inversely correlated with disease score, IL-6 and interferon-γ levels in UC-New children. IL-2 expression was upregulated in UC-Remission, compared with controls. CONCLUSIONS Efflux transporter expression varies between UC children and adults except for decreased multidrug resistance protein 1. UC is characterized by a dysregulated TH1 and TH17 cytokine response irrespective of age at disease onset, with higher cytokine levels detected in children. Increased IL-2 levels in remission imply a protective role for regulatory T cells (Tregs).
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48
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Lai X, Cao M, Song X, Jia R, Zou Y, Li L, Liang X, He C, Yin L, Yue G, Ye G, Yin Z. Resveratrol promotes recovery of immune function of immunosuppressive mice by activating JNK/NF-κB pathway in splenic lymphocytes. Can J Physiol Pharmacol 2017; 95:763-767. [DOI: 10.1139/cjpp-2016-0404] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Resveratrol, a natural compound found in over 70 plants, is known to possess immunoregulatory effects and anti-inflammatory activity. It has been shown that resveratrol has regulatory effects on different signaling pathways in different diseases. However, few reports have evaluated the effects of resveratrol on reinforcing immunity recovery via activating nuclear factor-κB (NF-κB) pathway and Jun N-terminal kinases (JNK) pathway. The present study aimed to assess immune-enhancing activity and underlying mechanism of resveratrol in immunosuppressive mice. Previously, we reported that resveratrol could promote mouse spleen lymphocyte functions to recover the immune system effectively. In the present study, we show that resveratrol could upregulate the expressions of NF-κB, IκB kinase, JNK, and c-jun in splenic lymphocytes of immunosuppressive mice. Taken together, our results indicate that resveratrol could promote recovery of immunologic function in immunosuppressive mice by activating JNK/NF-κB pathway.
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Affiliation(s)
- Xin Lai
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Mei Cao
- Core Laboratory, Sichuan Provincial People’s Hospital, Chengdu, 610072, China
| | - Xu Song
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Renyong Jia
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yuanfeng Zou
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lixia Li
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiaoxia Liang
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Changliang He
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Lizi Yin
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Guizhou Yue
- College of Science, Sichuan Agricultural University, Ya’an, 625014, China
| | - Gang Ye
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zhongqiong Yin
- Natural Medicine Research Center, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, 611130, China
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Oyler-Yaniv A, Oyler-Yaniv J, Whitlock BM, Liu Z, Germain RN, Huse M, Altan-Bonnet G, Krichevsky O. A Tunable Diffusion-Consumption Mechanism of Cytokine Propagation Enables Plasticity in Cell-to-Cell Communication in the Immune System. Immunity 2017; 46:609-620. [PMID: 28389069 DOI: 10.1016/j.immuni.2017.03.011] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 01/23/2017] [Accepted: 02/16/2017] [Indexed: 12/24/2022]
Abstract
Immune cells communicate by exchanging cytokines to achieve a context-appropriate response, but the distances over which such communication happens are not known. Here, we used theoretical considerations and experimental models of immune responses in vitro and in vivo to quantify the spatial extent of cytokine communications in dense tissues. We established that competition between cytokine diffusion and consumption generated spatial niches of high cytokine concentrations with sharp boundaries. The size of these self-assembled niches scaled with the density of cytokine-consuming cells, a parameter that gets tuned during immune responses. In vivo, we measured interactions on length scales of 80-120 μm, which resulted in a high degree of cell-to-cell variance in cytokine exposure. Such heterogeneous distributions of cytokines were a source of non-genetic cell-to-cell variability that is often overlooked in single-cell studies. Our findings thus provide a basis for understanding variability in the patterning of immune responses by diffusible factors.
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Affiliation(s)
- Alon Oyler-Yaniv
- Physics Department, Ben Gurion University of the Negev, Beer-Sheva 84105, Israel; ImmunoDynamics Group, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 21701, USA; Computational Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Jennifer Oyler-Yaniv
- ImmunoDynamics Group, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 21701, USA; Computational Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Immunology and Microbial Pathogenesis Program, Weill Cornell Graduate School of Medical Sciences, New York, NY 10065, USA
| | - Benjamin M Whitlock
- Computational Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Biochemistry and Molecular Biology Graduate Program, Weill-Cornell Medical College, New York 10065, USA
| | - Zhiduo Liu
- Lymphocyte Biology Section, Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Ronald N Germain
- Lymphocyte Biology Section, Laboratory of Systems Biology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892, USA
| | - Morgan Huse
- Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA
| | - Grégoire Altan-Bonnet
- ImmunoDynamics Group, Cancer and Inflammation Program, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD 21701, USA; Computational Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA.
| | - Oleg Krichevsky
- Physics Department, Ben Gurion University of the Negev, Beer-Sheva 84105, Israel; Computational Biology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Immunology Program, Memorial Sloan Kettering Cancer Center, New York, NY 10065, USA; Ilse Kats Center for Nanoscience, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
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50
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Harpaz I, Bhattacharya U, Elyahu Y, Strominger I, Monsonego A. Old Mice Accumulate Activated Effector CD4 T Cells Refractory to Regulatory T Cell-Induced Immunosuppression. Front Immunol 2017; 8:283. [PMID: 28382033 PMCID: PMC5360761 DOI: 10.3389/fimmu.2017.00283] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Accepted: 02/28/2017] [Indexed: 12/22/2022] Open
Abstract
Chronic low-grade inflammation and reduced lymphocyte potency are implicated in the pathogenesis of major illnesses associated with aging. Whether this immune phenotype results from a loss of cell-mediated regulation or intrinsic dysregulated function of effector T cells (Teffs) requires further research. Here, we report that, as compared with young C57BL6 mice, old mice show an increased frequency of CD4+CD62L- Teffs with a dysregulated activated phenotype and markedly increased effector functions. Analysis of the frequency and suppressive function of CD4+FoxP3+ regulatory T cells (Tregs) indicates an increase in the frequency of FoxP3+ T cells with aging which, however, occurs within the CD4+CD25- T cells. Furthermore, whereas Tregs from young and old mice similarly suppress Teffs from young mice, both have a compromised suppressive capacity of Teffs from old mice, a phenomenon which is partially recovered in the presence of IL-2-producing CD4+CD62L+ non-Teffs. Finally, we observed that Teff subsets from old mice are enriched with IL-17A-producing T cells and exhibit intrinsically dysregulated expression of genes encoding cell-surface molecules and transcription factors, which play a key role in T-cell activation and regulation. We, thus, demonstrate an age-related impairment in the regulation of effector CD4 T cells, which may underlie the higher risk for destructive inflammation associated with aging.
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Affiliation(s)
- Idan Harpaz
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Zlotowski Center for Neuroscience, The National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev , Beer Sheva , Israel
| | - Udayan Bhattacharya
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Zlotowski Center for Neuroscience, The National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev , Beer Sheva , Israel
| | - Yehezqel Elyahu
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Zlotowski Center for Neuroscience, The National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev , Beer Sheva , Israel
| | - Itai Strominger
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Zlotowski Center for Neuroscience, The National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev , Beer Sheva , Israel
| | - Alon Monsonego
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Zlotowski Center for Neuroscience, The National Institute of Biotechnology in the Negev, Ben-Gurion University of the Negev , Beer Sheva , Israel
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