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Gootjes C, Zwaginga JJ, Roep BO, Nikolic T. Defining Human Regulatory T Cells beyond FOXP3: The Need to Combine Phenotype with Function. Cells 2024; 13:941. [PMID: 38891073 PMCID: PMC11172350 DOI: 10.3390/cells13110941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 04/18/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024] Open
Abstract
Regulatory T cells (Tregs) are essential to maintain immune homeostasis by promoting self-tolerance. Reduced Treg numbers or functionality can lead to a loss of tolerance, increasing the risk of developing autoimmune diseases. An overwhelming variety of human Tregs has been described, based on either specific phenotype, tissue compartment, or pathological condition, yet the bulk of the literature only addresses CD25-positive and CD127-negative cells, coined by naturally occurring Tregs (nTregs), most of which express the transcription factor Forkhead box protein 3 (FOXP3). While the discovery of FOXP3 was seminal to understanding the origin and biology of nTregs, there is evidence in humans that not all T cells expressing FOXP3 are regulatory, and that not all Tregs express FOXP3. Namely, the activation of human T cells induces the transient expression of FOXP3, irrespective of whether they are regulatory or inflammatory effectors, while some induced T cells that may be broadly defined as Tregs (e.g., Tr1 cells) typically lack demethylation and do not express FOXP3. Furthermore, it is unknown whether and how many nTregs exist without FOXP3 expression. Several other candidate regulatory molecules, such as GITR, Lag-3, GARP, GPA33, Helios, and Neuropilin, have been identified but subsequently discarded as Treg-specific markers. Multiparametric analyses have uncovered a plethora of Treg phenotypes, and neither single markers nor combinations thereof can define all and only Tregs. To date, only the functional capacity to inhibit immune responses defines a Treg and distinguishes Tregs from inflammatory T cells (Teffs) in humans. This review revisits current knowledge of the Treg universe with respect to their heterogeneity in phenotype and function. We propose that it is unavoidable to characterize human Tregs by their phenotype in combination with their function, since phenotype alone does not unambiguously define Tregs. There is an unmet need to align the expression of specific markers or combinations thereof with a particular suppressive function to coin functional Treg entities and categorize Treg diversity.
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Affiliation(s)
- Chelsea Gootjes
- Laboratory of Immunomodulation and Regenerative Cell Therapy, Department of Internal Medicine, Leiden University Medical Center, 2333 ZA Leiden, The Netherlands; (J.J.Z.); (T.N.)
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2
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Soudais C, Schaus R, Bachelet C, Minet N, Mouasni S, Garcin C, Souza CL, David P, Cousu C, Asnagli H, Parker A, Palmquist-Gomes P, Sepulveda FE, Storck S, Meilhac SM, Fischer A, Martin E, Latour S. Inactivation of cytidine triphosphate synthase 1 prevents fatal auto-immunity in mice. Nat Commun 2024; 15:1982. [PMID: 38438357 PMCID: PMC10912214 DOI: 10.1038/s41467-024-45805-y] [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: 02/23/2023] [Accepted: 01/25/2024] [Indexed: 03/06/2024] Open
Abstract
De novo synthesis of the pyrimidine, cytidine triphosphate (CTP), is crucial for DNA/RNA metabolism and depends on the CTP synthetases, CTPS1 and -2. Partial CTPS1 deficiency in humans has previously been shown to lead to immunodeficiency, with impaired expansion of T and B cells. Here, we examine the effects of conditional and inducible inactivation of Ctps1 and/or Ctps2 on mouse embryonic development and immunity. We report that deletion of Ctps1, but not Ctps2, is embryonic-lethal. Tissue and cells with high proliferation and renewal rates, such as intestinal epithelium, erythroid and thymic lineages, activated B and T lymphocytes, and memory T cells strongly rely on CTPS1 for their maintenance and growth. However, both CTPS1 and CTPS2 are required for T cell proliferation following TCR stimulation. Deletion of Ctps1 in T cells or treatment with a CTPS1 inhibitor rescued Foxp3-deficient mice from fatal systemic autoimmunity and reduced the severity of experimental autoimmune encephalomyelitis. These findings support that CTPS1 may represent a target for immune suppression.
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Affiliation(s)
- Claire Soudais
- Laboratory of Lymphocyte Activation and Susceptibility to EBV infection, Inserm UMR 1163, Institut Imagine, Paris, France.
- Université de Paris Cité, Paris, France.
| | - Romane Schaus
- Laboratory of Lymphocyte Activation and Susceptibility to EBV infection, Inserm UMR 1163, Institut Imagine, Paris, France
| | - Camille Bachelet
- Laboratory of Lymphocyte Activation and Susceptibility to EBV infection, Inserm UMR 1163, Institut Imagine, Paris, France
- Université de Paris Cité, Paris, France
| | - Norbert Minet
- Laboratory of Lymphocyte Activation and Susceptibility to EBV infection, Inserm UMR 1163, Institut Imagine, Paris, France
- Université de Paris Cité, Paris, France
| | - Sara Mouasni
- Laboratory of Molecular Basis of Altered Immune Homeostasis Inserm UMR 1163, Institut Imagine, Paris, France
| | - Cécile Garcin
- Laboratory of Lymphocyte Activation and Susceptibility to EBV infection, Inserm UMR 1163, Institut Imagine, Paris, France
- Université de Paris Cité, Paris, France
| | - Caique Lopes Souza
- Laboratory of Lymphocyte Activation and Susceptibility to EBV infection, Inserm UMR 1163, Institut Imagine, Paris, France
- Université de Paris Cité, Paris, France
| | - Pierre David
- Transgenesis Platform, Laboratoire d'Expérimentation Animale et Transgenèse (LEAT), Institut Imagine-Structure Fédérative de Recherche Necker INSERM US24/CNRS, UMS3633, Paris, France
| | - Clara Cousu
- Université Paris Cité, CNRS UMR 8253, INSERM U1151, Institut Necker Enfants Malades, F-75015, Paris, France
| | - Hélène Asnagli
- Step-Pharma, Technoparc du Pays-de-Gex, Saint-Genis-Pouilly, France
| | - Andrew Parker
- Step-Pharma, Technoparc du Pays-de-Gex, Saint-Genis-Pouilly, France
| | - Paul Palmquist-Gomes
- Université de Paris Cité, Paris, France
- Imagine - Institut Pasteur, Unit of Heart Morphogenesis, INSERM UMR1163, F-75015, Paris, France
| | - Fernando E Sepulveda
- Laboratory of Molecular Basis of Altered Immune Homeostasis Inserm UMR 1163, Institut Imagine, Paris, France
| | - Sébastien Storck
- Université Paris Cité, CNRS UMR 8253, INSERM U1151, Institut Necker Enfants Malades, F-75015, Paris, France
| | - Sigolène M Meilhac
- Université de Paris Cité, Paris, France
- Imagine - Institut Pasteur, Unit of Heart Morphogenesis, INSERM UMR1163, F-75015, Paris, France
| | - Alain Fischer
- Laboratory of Lymphocyte Activation and Susceptibility to EBV infection, Inserm UMR 1163, Institut Imagine, Paris, France
- Collège de France, Paris, France
| | - Emmanuel Martin
- Laboratory of Lymphocyte Activation and Susceptibility to EBV infection, Inserm UMR 1163, Institut Imagine, Paris, France
| | - Sylvain Latour
- Laboratory of Lymphocyte Activation and Susceptibility to EBV infection, Inserm UMR 1163, Institut Imagine, Paris, France.
- Université de Paris Cité, Paris, France.
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3
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Hajam EY, Panikulam P, Chu CC, Jayaprakash H, Majumdar A, Jamora C. The expanding impact of T-regs in the skin. Front Immunol 2022; 13:983700. [PMID: 36189219 PMCID: PMC9521603 DOI: 10.3389/fimmu.2022.983700] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 08/26/2022] [Indexed: 11/29/2022] Open
Abstract
As the interface between the body and the environment, the skin functions as the physical barrier against external pathogens and toxic agents. In addition, the skin is an immunologically active organ with a plethora of resident adaptive and innate immune cells, as well as effector molecules that provide another layer of protection in the form of an immune barrier. A major subpopulation of these immune cells are the Foxp3 expressing CD4 T cells or regulatory T cells (T-regs). The canonical function of T-regs is to keep other immune cells in check during homeostasis or to dissipate a robust inflammatory response following pathogen clearance or wound healing. Interestingly, recent data has uncovered unconventional roles that vary between different tissues and we will highlight the emerging non-lymphoid functions of cutaneous T-regs. In light of the novel functions of other immune cells that are routinely being discovered in the skin, their regulation by T-regs implies that T-regs have executive control over a broad swath of biological activities in both homeostasis and disease. The blossoming list of non-inflammatory functions, whether direct or indirect, suggests that the role of T-regs in a regenerative organ such as the skin will be a field ripe for discovery for decades to come.
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Affiliation(s)
- Edries Yousaf Hajam
- IFOM ETS- The AIRC Institute of Molecular Oncology Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
- School of Chemical and Biotechnology, Shanmugha Arts, Science, Technology and Research Academy (SASTRA) University, Thanjavur, Tamil Nadu, India
| | - Patricia Panikulam
- IFOM ETS- The AIRC Institute of Molecular Oncology Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
| | | | - Haarshadri Jayaprakash
- IFOM ETS- The AIRC Institute of Molecular Oncology Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
| | | | - Colin Jamora
- IFOM ETS- The AIRC Institute of Molecular Oncology Joint Research Laboratory, Centre for Inflammation and Tissue Homeostasis, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, Karnataka, India
- *Correspondence: Colin Jamora,
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Kotschenreuther K, Yan S, Kofler DM. Migration and homeostasis of regulatory T cells in rheumatoid arthritis. Front Immunol 2022; 13:947636. [PMID: 36016949 PMCID: PMC9398455 DOI: 10.3389/fimmu.2022.947636] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 07/20/2022] [Indexed: 12/17/2022] Open
Abstract
Regulatory T (Treg) cells are garnering increased attention in research related to autoimmune diseases, including rheumatoid arthritis (RA). They play an essential role in the maintenance of immune homeostasis by restricting effector T cell activity. Reduced functions and frequencies of Treg cells contribute to the pathogenesis of RA, a common autoimmune disease which leads to systemic inflammation and erosive joint destruction. Treg cells from patients with RA are characterized by impaired functions and by an altered phenotype. They show increased plasticity towards Th17 cells and a reduced suppressive capacity. Besides the suppressive function of Treg cells, their effectiveness is determined by their ability to migrate into inflamed tissues. In the past years, new mechanisms involved in Treg cell migration have been identified. One example of such a mechanism is the phosphorylation of vasodilator-stimulated phosphoprotein (VASP). Efficient migration of Treg cells requires the presence of VASP. IL-6, a cytokine which is abundantly present in the peripheral blood and in the synovial tissue of RA patients, induces posttranslational modifications of VASP. Recently, it has been shown in mice with collagen-induced arthritis (CIA) that this IL-6 mediated posttranslational modification leads to reduced Treg cell trafficking. Another protein which facilitates Treg cell migration is G-protein-signaling modulator 2 (GPSM2). It modulates G-protein coupled receptor functioning, thereby altering the cellular activity initiated by cell surface receptors in response to extracellular signals. The almost complete lack of GPSM2 in Treg cells from RA patients contributes to their reduced ability to migrate towards inflammatory sites. In this review article, we highlight the newly identified mechanisms of Treg cell migration and review the current knowledge about impaired Treg cell homeostasis in RA.
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Affiliation(s)
- Konstantin Kotschenreuther
- Laboratory of Molecular Immunology, Division of Rheumatology and Clinical Immunology, Department I of Internal Medicine, Faculty of Medicine, University Hospital Cologne, University of Cologne, Cologne, Germany
| | - Shuaifeng Yan
- Laboratory of Molecular Immunology, Division of Rheumatology and Clinical Immunology, Department I of Internal Medicine, Faculty of Medicine, University Hospital Cologne, University of Cologne, Cologne, Germany
| | - David M. Kofler
- Laboratory of Molecular Immunology, Division of Rheumatology and Clinical Immunology, Department I of Internal Medicine, Faculty of Medicine, University Hospital Cologne, University of Cologne, Cologne, Germany
- Center for Integrated Oncology Aachen Bonn Cologne Duesseldorf, Cologne, Germany
- *Correspondence: David M. Kofler,
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Su S, Katopodi XL, Pita-Juarez YH, Maverakis E, Vlachos IS, Adamopoulos IE. Serine and arginine rich splicing factor 1 deficiency alters pathways involved in IL-17A expression and is implicated in human psoriasis. Clin Immunol 2022; 240:109041. [PMID: 35613697 PMCID: PMC10797199 DOI: 10.1016/j.clim.2022.109041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/08/2022] [Accepted: 05/09/2022] [Indexed: 12/25/2022]
Abstract
Serine and Arginine Rich Splicing Factor 1 (SRSF1) is a splicing factor that binds to exonic enhancers and stimulates splicing and is previously implicated with autoimmunity. Herein, we investigate the role of SRSF1 in regulating innate immune functions that are pertinent in the pathogenesis of auto-inflammatory diseases. Specifically, we show that conditional deletion of SRSF1 in mature lymphocytes resulted in higher expression of il-17a and il-17 f and an expansion of IL17A+ CD8 T cells. Mechanistically, the aberrant expression of IL-17A in SRSF1 cKO mice could not be attributed to alternative splicing of il-17a or il-17 f genes but possibly to defective CD11B+LY6C+ myeloid derived suppressor function in the spleen. Finally, meta-analysis of RNA-Seq collected from psoriasis patients demonstrate a clear correlation between SRSF1 and psoriasis that suggests a putative role of SRSF1 in IL-17A-induced psoriasis.
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Affiliation(s)
- Shi Su
- Department of Rheumatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Xanthi-Lida Katopodi
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Yered H Pita-Juarez
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Emanual Maverakis
- Department of Dermatology, University of California, Davis, Sacramento, CA, USA
| | - Ioannis S Vlachos
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; Harvard Medical School Initiative for RNA Medicine, Boston, MA, USA; Cancer Research Institute, Beth Israel Deaconess Medical Center, Boston, MA, USA; Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - Iannis E Adamopoulos
- Department of Rheumatology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA.
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Borna S, Lee E, Sato Y, Bacchetta R. Towards gene therapy for IPEX syndrome. Eur J Immunol 2022; 52:705-716. [PMID: 35355253 PMCID: PMC9322407 DOI: 10.1002/eji.202149210] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 01/29/2022] [Accepted: 03/29/2022] [Indexed: 11/30/2022]
Abstract
Immune dysregulation polyendocrinopathy enteropathy X linked (IPEX) syndrome is an uncurable disease of the immune system, with immune dysregulation that is caused by mutations in FOXP3. Current treatment options, such as pharmacological immune suppression and allogeneic hematopoietic stem cell transplantation, have been beneficial but present limitations, and their life‐long consequences are ill‐defined. Other similar blood monogenic diseases have been successfully treated using gene transfer in autologous patient cells, thus providing an effective and less invasive therapeutic. Development of gene therapy for patients with IPEX is particularly challenging because successful strategies must restore the complex expression profile of the transcription factor FOXP3, ensuring it is tightly regulated and its cell subset‐specific roles are maintained. This review summarizes current efforts toward achieving gene therapy to treat immune dysregulation in IPEX patients.
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Affiliation(s)
- Simon Borna
- Department of Pediatrics, Division of Hematology, Oncology, Stem Cell Transplantation and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Esmond Lee
- Department of Pediatrics, Division of Hematology, Oncology, Stem Cell Transplantation and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA.,Institute for Stem Cell Biology and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Yohei Sato
- Department of Pediatrics, Division of Hematology, Oncology, Stem Cell Transplantation and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Rosa Bacchetta
- Department of Pediatrics, Division of Hematology, Oncology, Stem Cell Transplantation and Regenerative Medicine, Stanford University School of Medicine, Stanford, CA, USA.,Center for Definitive and Curative Medicine, Stanford University School of Medicine, Stanford, CA, USA
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7
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Petrova T, Bennett K, Nanda S, Strickson S, Scudamore CL, Prescott AR, Cohen P. Why are the phenotypes of TRAF6 knock-in and TRAF6 knock-out mice so different? PLoS One 2022; 17:e0263151. [PMID: 35157702 PMCID: PMC8843210 DOI: 10.1371/journal.pone.0263151] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Accepted: 01/12/2022] [Indexed: 11/30/2022] Open
Abstract
The expression of TNF-Receptor Associated Factor 6 (TRAF6) is essential for many physiological processes. Here we studied the phenotype of TRAF6[L74H] knock-in mice which are devoid of TRAF6 E3 ligase activity in every cell of the body, but express normal levels of the TRAF6 protein. Remarkably, TRAF6[L74H] mice have none of the phenotypes seen in TRAF6 KO mice. Instead TRAF6[L74H] mice display an entirely different phenotype, exhibiting autoimmunity, and severe inflammation of the skin and modest inflammation of the liver and lungs. Similar to mice with a Treg-specific knockout of TRAF6, or mice devoid of TRAF6 in all T cells, the CD4+ and CD8+ T cells in the spleen and lymph nodes displayed an activated effector memory phenotype with CD44high/CD62Llow expression on the cell surface. In contrast, T cells from WT mice exhibited the CD44low/CD62Lhigh phenotype characteristic of naïve T cells. The onset of autoimmunity and autoinflammation in TRAF6[L74H] mice (two weeks) was much faster than in mice with a Treg-specific knockout of TRAF6 or lacking TRAF6 expression in all T cells (2-3 months) and we discuss whether this may be caused by secondary inflammation of other tissues. The distinct phenotypes of mice lacking TRAF6 expression in all cells appears to be explained by their inability to signal via TNF Receptor Superfamily members, which does not seem to be impaired significantly in TRAF6[L74H] mice.
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Affiliation(s)
- Tsvetana Petrova
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | - Kyle Bennett
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee, United Kingdom
- Division of Cell Signalling, School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | - Sambit Nanda
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | - Sam Strickson
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | | | - Alan R. Prescott
- Dundee Imaging Facility and Division of Cell Signalling and Immunology, School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | - Philip Cohen
- MRC Protein Phosphorylation and Ubiquitylation Unit, School of Life Sciences, University of Dundee, Dundee, United Kingdom
- * E-mail:
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Mucosal tissue regulatory T cells are integral in balancing immunity and tolerance at portals of antigen entry. Mucosal Immunol 2022; 15:398-407. [PMID: 34845322 PMCID: PMC8628059 DOI: 10.1038/s41385-021-00471-x] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/19/2021] [Accepted: 11/03/2021] [Indexed: 02/04/2023]
Abstract
Foxp3+ regulatory T cells (Tregs) are a subset of CD4+ T cells that exert suppressive control over other immune cells. Tregs are critical for preventing systemic autoimmunity and maintaining peripheral tolerance, and yet they also assist in orchestration of immunity to pathogenic insult, wherein they limit collateral immunopathology and assist in facilitating a fine balance between immune tolerance and effector activity. Tregs have been extensively studied in lymphoid tissues, and a growing body of work has characterized phenotypically distinct Tregs localized in various nonlymphoid tissue compartments. These tissue Tregs can perform location-specific, alternative functions, highlighting their dynamic, context-dependent roles. Tregs have also been identified in mucosal tissues where specialized physiological functions are paramount, including helping the host to respond appropriately to pathogenic versus innocuous antigens that are abundant at mucosal portals of antigen entry. As in other tissue Treg compartments, mucosal Tregs in the respiratory, gastrointestinal, and genitourinary tracts are distinct from circulating counterparts and can carry out mucosa-specific functions as well as classic suppressive functions that are the hallmark of Tregs. In this review, we summarize current knowledge regarding mucosal Tregs in both health and disease.
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The many-sided contributions of NF-κB to T-cell biology in health and disease. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2020; 361:245-300. [PMID: 34074496 DOI: 10.1016/bs.ircmb.2020.10.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
T cells (or T lymphocytes) exhibit a myriad of functions in immune responses, ranging from pathogen clearance to autoimmunity, cancer and even non-lymphoid tissue homeostasis. Therefore, deciphering the molecular mechanisms orchestrating their specification, function and gene expression pattern is critical not only for our comprehension of fundamental biology, but also for the discovery of novel therapeutic targets. Among the master regulators of T-cell identity, the functions of the NF-κB family of transcription factors have been under scrutiny for several decades. However, a more precise understanding of their pleiotropic functions is only just emerging. In this review we will provide a global overview of the roles of NF-κB in the different flavors of mature T cells. We aim at highlighting the complex and sometimes diverging roles of the five NF-κB subunits in health and disease.
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Bukhari S, Mertz AF, Naik S. Eavesdropping on the conversation between immune cells and the skin epithelium. Int Immunol 2020; 31:415-422. [PMID: 30721971 DOI: 10.1093/intimm/dxy088] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Accepted: 01/04/2019] [Indexed: 11/12/2022] Open
Abstract
The skin epithelium covers our body and serves as a vital interface with the external environment. Here, we review the context-specific interactions between immune cells and the epithelium that underlie barrier fitness and function. We highlight the mechanisms by which these two systems engage each other and how immune-epithelial interactions are tuned by microbial and inflammatory stimuli. Epithelial homeostasis relies on a delicate balance of immune surveillance and tolerance, breakdown of which results in disease. In addition to their canonical immune functions, resident and recruited immune cells also supply the epithelium with instructive signals to promote repair. Decoding the dialogue between immunity and the epithelium therefore has great potential for boosting barrier function or mitigating inflammatory epithelial diseases.
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Affiliation(s)
- Shoiab Bukhari
- Department of Pathology, Department of Medicine and Ronald O. Perelman Department of Dermatology, NYU School of Medicine, New York, NY, USA
| | - Aaron F Mertz
- Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, NY, USA
| | - Shruti Naik
- Department of Pathology, Department of Medicine and Ronald O. Perelman Department of Dermatology, NYU School of Medicine, New York, NY, USA
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Gingele S, Pul R, Sardari M, Borbor M, Henkel F, Moellenkamp TM, Gudi V, Happle C, Grychtol R, Habener A, Hansen G, Hermann DM, Stangel M, Kleinschnitz C, Skuljec J. FoxP3 deficiency causes no inflammation or neurodegeneration in the murine brain. J Neuroimmunol 2020; 342:577216. [PMID: 32199198 DOI: 10.1016/j.jneuroim.2020.577216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 03/10/2020] [Accepted: 03/11/2020] [Indexed: 12/20/2022]
Abstract
Regulatory T cells (Treg) maintain immunological self-tolerance and their functional or numerical deficits are associated with progression of several neurological diseases. We examined the effects of Treg absence on the structure and integrity of the unchallenged murine brain. When compared to control, Treg-deficient FoxP3sf mutant mice showed no differences in brain size, myelin amount and oligodendrocyte numbers. FoxP3sf strain displayed no variations in quantity of neurons and astrocytes, whereas microglia numbers were slightly reduced. We demonstrate lack of neuroinflammation and parenchymal responses in the brains of Treg-deficient mice, suggesting a minor Treg role in absence of blood-brain barrier breakdown.
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Affiliation(s)
- Stefan Gingele
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
| | - Refik Pul
- Department of Neurology, University Medicine Essen, University Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany.
| | - Maryam Sardari
- Department of Neurology, University Medicine Essen, University Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany.
| | - Mina Borbor
- Department of Neurology, University Medicine Essen, University Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany.
| | - Florian Henkel
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
| | - Thiemo M Moellenkamp
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
| | - Viktoria Gudi
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
| | - Christine Happle
- Department of Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), German Center for Lung Research (DZL), Germany.
| | - Ruth Grychtol
- Department of Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), German Center for Lung Research (DZL), Germany.
| | - Anika Habener
- Department of Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), German Center for Lung Research (DZL), Germany.
| | - Gesine Hansen
- Department of Pediatric Pneumology, Allergology and Neonatology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany; Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), German Center for Lung Research (DZL), Germany.
| | - Dirk M Hermann
- Department of Neurology, University Medicine Essen, University Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany.
| | - Martin Stangel
- Department of Neurology, Hannover Medical School, Carl-Neuberg-Str. 1, 30625 Hannover, Germany.
| | - Christoph Kleinschnitz
- Department of Neurology, University Medicine Essen, University Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany.
| | - Jelena Skuljec
- Department of Neurology, University Medicine Essen, University Duisburg-Essen, Hufelandstr. 55, 45147 Essen, Germany.
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12
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Abdel-Motal UM, Al-Shaibi A, Elawad M, Lo B. Zero tolerance! A perspective on monogenic disorders with defective regulatory T cells and IBD-like disease. Immunol Rev 2019; 287:236-240. [PMID: 30565246 DOI: 10.1111/imr.12717] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Accepted: 08/12/2018] [Indexed: 12/27/2022]
Abstract
Recently, several studies have investigated a number of rare monogenic autoimmune disorders, in which the causative genetic defects were identified and found to affect the development or function of regulatory T cells (Tregs). The studies of these disorders have facilitated a deeper understanding of the mechanisms involved in immune regulation and tolerance. Furthermore, these studies have highlighted the importance of Tregs in maintaining homeostasis at the mucosal interface between the host and microbiome. Here, we offer our perspective on these monogenic autoimmune disorders, highlighting their overlapping clinical features with inflammatory bowel disease.
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Affiliation(s)
- Ussama M Abdel-Motal
- Division of Translational Medicine, Research Branch, Sidra Medicine, Doha, Qatar
| | - Ahmad Al-Shaibi
- Division of Translational Medicine, Research Branch, Sidra Medicine, Doha, Qatar
| | - Mamoun Elawad
- Division of Gastroenterology, Hepatology and Nutrition, Sidra Medicine, Doha, Qatar
| | - Bernice Lo
- Division of Translational Medicine, Research Branch, Sidra Medicine, Doha, Qatar
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13
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He B, Liu Y, Hoang TK, Tian X, Taylor CM, Luo M, Tran DQ, Tatevian N, Rhoads JM. Antibiotic-modulated microbiome suppresses lethal inflammation and prolongs lifespan in Treg-deficient mice. MICROBIOME 2019; 7:145. [PMID: 31699146 PMCID: PMC6839243 DOI: 10.1186/s40168-019-0751-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2019] [Accepted: 09/24/2019] [Indexed: 05/10/2023]
Abstract
BACKGROUND Regulatory T cell (Treg) deficiency leads to IPEX syndrome, a lethal autoimmune disease, in Human and mice. Dysbiosis of the gut microbiota in Treg-deficient scurfy (SF) mice has been described, but to date, the role of the gut microbiota remains to be determined. RESULTS To examine how antibiotic-modified microbiota can inhibit Treg deficiency-induced lethal inflammation in SF mice, Treg-deficient SF mice were treated with three different antibiotics. Different antibiotics resulted in distinct microbiota and metabolome changes and led to varied efficacy in prolonging lifespan and reducing inflammation in the liver and lung. Moreover, antibiotics altered plasma levels of several cytokines, especially IL-6. By analyzing gut microbiota and metabolome, we determined the microbial and metabolomic signatures which were associated with the antibiotics. Remarkably, antibiotic treatments restored the levels of several primary and secondary bile acids, which significantly reduced IL-6 expression in RAW macrophages in vitro. IL-6 blockade prolonged lifespan and inhibited inflammation in the liver and lung. By using IL-6 knockout mice, we further identified that IL-6 deletion provided a significant portion of the protection against inflammation induced by Treg dysfunction. CONCLUSION Our results show that three antibiotics differentially prolong survival and inhibit lethal inflammation in association with a microbiota-IL-6 axis. This pathway presents a potential avenue for treating Treg deficiency-mediated autoimmune disorders.
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Affiliation(s)
- Baokun He
- Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200080, China.
- Shanghai Key Laboratory of Pancreatic Disease, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 201620, China.
- Division of Gastroenterology, Department of Pediatrics, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, 77030, USA.
| | - Yuying Liu
- Division of Gastroenterology, Department of Pediatrics, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, 77030, USA
| | - Thomas K Hoang
- Division of Gastroenterology, Department of Pediatrics, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, 77030, USA
| | - Xiangjun Tian
- Department of Bioinformatics & Computational Biology, The University of Texas MD Anderson Cancer Center, Houston, TX, 77030, USA
| | - Christopher M Taylor
- Department of Microbiology, Immunology & Parasitology, Louisiana State University School of Medicine, Children's Hospital, New Orleans, Louisiana, 70118, USA
| | - Meng Luo
- Department of Microbiology, Immunology & Parasitology, Louisiana State University School of Medicine, Children's Hospital, New Orleans, Louisiana, 70118, USA
| | - Dat Q Tran
- Division of Gastroenterology, Department of Pediatrics, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, 77030, USA
| | - Nina Tatevian
- Department of Pathology and Laboratory Medicine, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, 77030, USA
| | - J Marc Rhoads
- Division of Gastroenterology, Department of Pediatrics, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, 77030, USA.
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14
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Ronin E, Lubrano di Ricco M, Vallion R, Divoux J, Kwon HK, Grégoire S, Collares D, Rouers A, Baud V, Benoist C, Salomon BL. The NF-κB RelA Transcription Factor Is Critical for Regulatory T Cell Activation and Stability. Front Immunol 2019; 10:2487. [PMID: 31749798 PMCID: PMC6842949 DOI: 10.3389/fimmu.2019.02487] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2019] [Accepted: 10/04/2019] [Indexed: 01/01/2023] Open
Abstract
Regulatory T cells (Tregs) play a major role in immune homeostasis and in the prevention of autoimmune diseases. It has been shown that c-Rel is critical in Treg thymic differentiation, but little is known on the role of NF-κB on mature Treg biology. We thus generated mice with a specific knockout of RelA, a key member of NF-κB, in Tregs. These mice developed a severe autoimmune syndrome with multi-organ immune infiltration and high activation of lymphoid and myeloid cells. Phenotypic and transcriptomic analyses showed that RelA is critical in the acquisition of the effector Treg state independently of surrounding inflammatory environment. Unexpectedly, RelA-deficient Tregs also displayed reduced stability and cells that had lost Foxp3 produced inflammatory cytokines. Overall, we show that RelA is critical for Treg biology as it promotes both the generation of their effector phenotype and the maintenance of their identity.
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Affiliation(s)
- Emilie Ronin
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Martina Lubrano di Ricco
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Romain Vallion
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Jordane Divoux
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Ho-Keun Kwon
- Division of Immunology, Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA, United States
| | - Sylvie Grégoire
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Davi Collares
- Laboratoire NF-κB, Differentiation and Cancer, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Angéline Rouers
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
| | - Véronique Baud
- Laboratoire NF-κB, Differentiation and Cancer, Université Paris Descartes, Sorbonne Paris Cité, Paris, France
| | - Christophe Benoist
- Division of Immunology, Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA, United States
| | - Benoit L Salomon
- Sorbonne Université, INSERM, CNRS, Centre d'Immunologie et des Maladies Infectieuses (CIMI-Paris), Paris, France
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15
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Liu Y, Tran DQ, Rhoads JM. Probiotics in Disease Prevention and Treatment. J Clin Pharmacol 2019; 58 Suppl 10:S164-S179. [PMID: 30248200 DOI: 10.1002/jcph.1121] [Citation(s) in RCA: 111] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Accepted: 02/17/2018] [Indexed: 12/17/2022]
Abstract
Few treatments for human diseases have received as much investigation in the past 20 years as probiotics. In 2017, English-language meta-analyses totaling 52 studies determined the effect of probiotics on conditions ranging from necrotizing enterocolitis and colic in infants to constipation, irritable bowel syndrome, and hepatic encephalopathy in adults. The strongest evidence in favor of probiotics lies in the prevention or treatment of 5 disorders: necrotizing enterocolitis, acute infectious diarrhea, acute respiratory tract infections, antibiotic-associated diarrhea, and infant colic. Probiotic mechanisms of action include the inhibition of bacterial adhesion; enhanced mucosal barrier function; modulation of the innate and adaptive immune systems (including induction of tolerogenic dendritic cells and regulatory T cells); secretion of bioactive metabolites; and regulation of the enteric and central nervous systems. Future research is needed to identify the optimal probiotic and dose for specific diseases, to address whether the addition of prebiotics (to form synbiotics) would enhance activity, and to determine if defined microbial communities would provide benefit exceeding that of single-species probiotics.
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Affiliation(s)
- Yuying Liu
- Department of Pediatrics, Division of Gastroenterology, and the Pediatric Research Center, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, USA
| | - Dat Q Tran
- Department of Pediatrics, Division of Gastroenterology, and the Pediatric Research Center, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, USA
| | - J Marc Rhoads
- Department of Pediatrics, Division of Gastroenterology, and the Pediatric Research Center, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX, USA
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16
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Olukanni O, Awotula A, Osuntoki A, Govindwar S. Influence of redox mediators and media on methyl red decolorization and its biodegradation by Providencia rettgeri. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0668-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
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17
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Foulsham W, Marmalidou A, Amouzegar A, Coco G, Chen Y, Dana R. Review: The function of regulatory T cells at the ocular surface. Ocul Surf 2017; 15:652-659. [PMID: 28576753 DOI: 10.1016/j.jtos.2017.05.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2017] [Revised: 05/29/2017] [Accepted: 05/29/2017] [Indexed: 12/20/2022]
Abstract
Regulatory T cells (Tregs) are critical modulators of immune homeostasis. Tregs maintain peripheral tolerance to self-antigens, thereby preventing autoimmune disease. Furthermore, Tregs suppress excessive immune responses deleterious to the host. Recent research has deepened our understanding of how Tregs function at the ocular surface. This manuscript describes the classification, the immunosuppressive mechanisms, and the phenotypic plasticity of Tregs. We review the contribution of Tregs to ocular surface autoimmune disease, as well as the function of Tregs in allergy and infection at the ocular surface. Finally, we review the role of Tregs in promoting allotolerance in corneal transplantation.
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Affiliation(s)
- William Foulsham
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Anna Marmalidou
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Afsaneh Amouzegar
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Giulia Coco
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Yihe Chen
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Reza Dana
- Schepens Eye Research Institute, Massachusetts Eye and Ear Infirmary, Department of Ophthalmology, Harvard Medical School, Boston, MA, USA.
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18
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Ellis JS, Braley-Mullen H. Mechanisms by Which B Cells and Regulatory T Cells Influence Development of Murine Organ-Specific Autoimmune Diseases. J Clin Med 2017; 6:jcm6020013. [PMID: 28134752 PMCID: PMC5332917 DOI: 10.3390/jcm6020013] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/21/2016] [Accepted: 01/18/2017] [Indexed: 12/25/2022] Open
Abstract
Experiments with B cell-deficient (B−/−) mice indicate that a number of autoimmune diseases require B cells in addition to T cells for their development. Using B−/− Non-obese diabetic (NOD) and NOD.H-2h4 mice, we demonstrated that development of spontaneous autoimmune thyroiditis (SAT), Sjogren’s syndrome and diabetes do not develop in B−/− mice, whereas all three diseases develop in B cell-positive wild-type (WT) mice. B cells are required early in life, since reconstitution of adult mice with B cells or autoantibodies did not restore their ability to develop disease. B cells function as important antigen presenting cells (APC) to initiate activation of autoreactive CD4+ effector T cells. If B cells are absent or greatly reduced in number, other APC will present the antigen, such that Treg are preferentially activated and effector T cells are not activated. In these situations, B−/− or B cell-depleted mice develop the autoimmune disease when T regulatory cells (Treg) are transiently depleted. This review focuses on how B cells influence Treg activation and function, and briefly considers factors that influence the effectiveness of B cell depletion for treatment of autoimmune diseases.
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Affiliation(s)
- Jason S Ellis
- Department of Surgery, University of Missouri, Columbia, MO 65212, USA.
- Department of Molecular Microbiology & Immunology, University of Missouri, Columbia, MO 65212, USA.
| | - Helen Braley-Mullen
- Department of Molecular Microbiology & Immunology, University of Missouri, Columbia, MO 65212, USA.
- Department of Medicine, University of Missouri, Columbia, MO 65212, USA.
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19
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Identification of Small-Molecule Inducers of FOXP3 in Human T Cells Using High-Throughput Flow Cytometry. SINGLE CELL ANALYSIS 2017. [DOI: 10.1007/978-981-10-4499-1_11] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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20
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He B, Hoang TK, Wang T, Ferris M, Taylor CM, Tian X, Luo M, Tran DQ, Zhou J, Tatevian N, Luo F, Molina JG, Blackburn MR, Gomez TH, Roos S, Rhoads JM, Liu Y. Resetting microbiota by Lactobacillus reuteri inhibits T reg deficiency-induced autoimmunity via adenosine A2A receptors. J Exp Med 2016; 214:107-123. [PMID: 27994068 PMCID: PMC5206500 DOI: 10.1084/jem.20160961] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 10/17/2016] [Accepted: 11/29/2016] [Indexed: 12/13/2022] Open
Abstract
He et al. show that T reg deficiency markedly induces autoimmunity and shifts gut microbiota. Remodeling microbiota by Lactobacillus reuteri was found to inhibit autoimmunity via the metabolite inosine, which interacts with the adenosine A2A receptor. This finding establishes a link between the gut microbiota, A2A receptors, and autoimmunity induced by T reg cell deficiency. Regulatory T (T reg) cell deficiency causes lethal, CD4+ T cell–driven autoimmune diseases. Stem cell transplantation is used to treat these diseases, but this procedure is limited by the availability of a suitable donor. The intestinal microbiota drives host immune homeostasis by regulating the differentiation and expansion of T reg, Th1, and Th2 cells. It is currently unclear if T reg cell deficiency–mediated autoimmune disorders can be treated by targeting the enteric microbiota. Here, we demonstrate that Foxp3+ T reg cell deficiency results in gut microbial dysbiosis and autoimmunity over the lifespan of scurfy (SF) mouse. Remodeling microbiota with Lactobacillus reuteri prolonged survival and reduced multiorgan inflammation in SF mice. L. reuteri changed the metabolomic profile disrupted by T reg cell deficiency, and a major effect was to restore levels of the purine metabolite inosine. Feeding inosine itself prolonged life and inhibited multiorgan inflammation by reducing Th1/Th2 cells and their associated cytokines. Mechanistically, the inhibition of inosine on the differentiation of Th1 and Th2 cells in vitro depended on adenosine A2A receptors, which were also required for the efficacy of inosine and of L. reuteri in vivo. These results reveal that the microbiota–inosine–A2A receptor axis might represent a potential avenue for combatting autoimmune diseases mediated by T reg cell dysfunction.
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Affiliation(s)
- Baokun He
- Pediatrics Gastroenterology, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030.,Pediatric Research Center, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
| | - Thomas K Hoang
- Pediatrics Gastroenterology, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030.,Pediatric Research Center, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
| | - Ting Wang
- Pediatrics Gastroenterology, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030.,Pediatric Research Center, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
| | - Michael Ferris
- Department of Microbiology, Immunology and Parasitology, Louisiana State University School of Medicine, New Orleans, LA 70118
| | - Christopher M Taylor
- Department of Microbiology, Immunology and Parasitology, Louisiana State University School of Medicine, New Orleans, LA 70118
| | - Xiangjun Tian
- The Alkek Center for Metagenomics and Microbiome Research, Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, TX 77030
| | - Meng Luo
- Department of Microbiology, Immunology and Parasitology, Louisiana State University School of Medicine, New Orleans, LA 70118
| | - Dat Q Tran
- Pediatric Research Center, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
| | - Jain Zhou
- Pathology and Laboratory Medicine, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
| | - Nina Tatevian
- Pathology and Laboratory Medicine, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
| | - Fayong Luo
- Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
| | - Jose G Molina
- Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
| | - Michael R Blackburn
- Department of Biochemistry and Molecular Biology, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
| | - Thomas H Gomez
- Center for Laboratory Animal Medicine and Care, The University of Texas Health Science Center at Houston, Houston, TX 77030
| | - Stefan Roos
- Department of Microbiology, Uppsala BioCenter, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden.,BioGaia AB, 103 64 Stockholm, Sweden
| | - J Marc Rhoads
- Pediatrics Gastroenterology, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030 .,Pediatric Research Center, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
| | - Yuying Liu
- Pediatrics Gastroenterology, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030 .,Pediatric Research Center, The University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030
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21
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Redecke V, Chaturvedi V, Kuriakose J, Häcker H. SHARPIN controls the development of regulatory T cells. Immunology 2016; 148:216-26. [PMID: 26931177 DOI: 10.1111/imm.12604] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 02/17/2016] [Accepted: 02/24/2016] [Indexed: 12/13/2022] Open
Abstract
SHARPIN is an essential component of the linear ubiquitin chain assembly complex (LUBAC) complex that controls signalling pathways of various receptors, including the tumour necrosis factor receptor (TNFR), Toll-like receptor (TLR) and antigen receptor, in part by synthesis of linear, non-degrading ubiquitin chains. Consistent with SHARPIN's function in different receptor pathways, the phenotype of SHARPIN-deficient mice is complex, including the development of inflammatory systemic and skin diseases, the latter of which depend on TNFR signal transduction. Given the established function of SHARPIN in primary and malignant B cells, we hypothesized that SHARPIN might also regulate T-cell receptor (TCR) signalling and thereby control T-cell biology. Here, we focus primarily on the role of SHARPIN in T cells, specifically regulatory T (Treg) cells. We found that SHARPIN-deficient (Sharpin(cpdm/cpdm) ) mice have significantly reduced numbers of FOXP3(+) Treg cells in lymphoid organs and the peripheral blood. Competitive reconstitution of irradiated mice with mixed bone marrow from wild-type and SHARPIN-deficient mice revealed an overall reduced thymus population with SHARPIN-deficient cells with almost complete loss of thymic Treg development. Consistent with this cell-intrinsic function of SHARPIN in Treg development, TCR stimulation of SHARPIN-deficient thymocytes revealed reduced activation of nuclear factor-κB and c-Jun N-terminal kinase, establishing a function of SHARPIN in TCR signalling, which may explain the defective Treg development. In turn, in vitro generation and suppressive activity of mature SHARPIN-deficient Treg cells were comparable to wild-type cells, suggesting that maturation, but not function, of SHARPIN-deficient Treg cells is impaired. Taken together, these findings show that SHARPIN controls TCR signalling and is required for efficient generation of Treg cells in vivo, whereas the inhibitory function of mature Treg cells appears to be independent of SHARPIN.
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Affiliation(s)
- Vanessa Redecke
- Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, TN, USA
| | - Vandana Chaturvedi
- Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, TN, USA
| | - Jeeba Kuriakose
- Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, TN, USA
| | - Hans Häcker
- Department of Infectious Diseases, St Jude Children's Research Hospital, Memphis, TN, USA
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22
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Nakajima A, Masaki Y, Nakamura T, Kawanami T, Ishigaki Y, Takegami T, Kawano M, Yamada K, Tsukamoto N, Matsui S, Saeki T, Okazaki K, Kamisawa T, Miyashita T, Yakushijin Y, Fujikawa K, Yamamoto M, Hamano H, Origuchi T, Hirata S, Tsuboi H, Sumida T, Morimoto H, Sato T, Iwao H, Miki M, Sakai T, Fujita Y, Tanaka M, Fukushima T, Okazaki T, Umehara H. Decreased Expression of Innate Immunity-Related Genes in Peripheral Blood Mononuclear Cells from Patients with IgG4-Related Disease. PLoS One 2015; 10:e0126582. [PMID: 25973893 PMCID: PMC4431830 DOI: 10.1371/journal.pone.0126582] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2014] [Accepted: 04/06/2015] [Indexed: 12/24/2022] Open
Abstract
Background IgG4-related disease (IgG4-RD) is a new clinical entity of unknown etiology characterized by elevated serum IgG4 and tissue infiltration by IgG4-positive plasma cells. Although aberrancies in acquired immune system functions, including increases in Th2 and Treg cytokines observed in patients with IgG4-RD, its true etiology remains unclear. To investigate the pathogenesis of IgG4-RD, this study compared the expression of genes related to innate immunity in patients with IgG4-RD and healthy controls. Materials and Methods Peripheral blood mononuclear cells (PBMCs) were obtained from patients with IgG4-RD before and after steroid therapy and from healthy controls. Total RNA was extracted and DNA microarray analysis was performed in two IgG4-RD patients to screen for genes showing changes in expression. Candidate genes were validated by real-time RT-PCR in 27 patients with IgG4-RD and 13 healthy controls. Results DNA microarray analysis identified 21 genes that showed a greater than 3-fold difference in expression between IgG4-RD patients and healthy controls and 30 genes that showed a greater than 3-fold change in IgG4-RD patients following steroid therapy. Candidate genes related to innate immunity, including those encoding Charcot–Leyden crystal protein (CLC), membrane-spanning 4-domain subfamily A member 3 (MS4A3), defensin alpha (DEFA) 3 and 4, and interleukin-8 receptors (IL8R), were validated by real-time RT-PCR. Expression of all genes was significantly lower in IgG4-RD patients than in healthy controls. Steroid therapy significantly increased the expression of DEFA3, DEFA4 and MS4A3, but had no effect on the expression of CLC, IL8RA and IL8RB. Conclusions The expression of genes related to allergy or innate immunity, including CLC, MS4A3, DEFA3, DEFA4, IL8RA and IL8RB, was lower in PBMCs from patients with IgG4-RD than from healthy controls. Although there is the limitation in the number of patients applied in DNA microarray, impaired expression of genes related to innate immunity may be involved in the pathogenesis of IgG4-RD as well as in abnormalities of acquired immunity.
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Affiliation(s)
- Akio Nakajima
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Yasufumi Masaki
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Takuji Nakamura
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Takafumi Kawanami
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Yasuhito Ishigaki
- Medical Research Institute, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Tsutomu Takegami
- Medical Research Institute, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Mitsuhiro Kawano
- Division of Rheumatology, Department of Internal Medicine, Kanazawa University Hospital, Ishikawa 920-8641, Japan
| | - Kazunori Yamada
- Division of Rheumatology, Department of Internal Medicine, Kanazawa University Hospital, Ishikawa 920-8641, Japan
| | - Norifumi Tsukamoto
- Department of Medicine and Clinical Science, Gunma University Graduate School of Medicine, Gunma 371-8511, Japan
| | - Shoko Matsui
- Health Administration Center University of Toyama, Toyama 930-0194, Japan
| | - Takako Saeki
- Department of Internal Medicine, Nagaoka Red Cross Hospital, Niigata 940-2085, Japan
| | - Kazuichi Okazaki
- Third Department of Internal Medicine, Division of Gastroenterology and Hepatology, Kansai Medical University, Osaka 573-1191, Japan
| | - Terumi Kamisawa
- Department of Internal Medicine, Tokyo Metropolitan Komagome Hospital, Tokyo 113-8677, Japan
| | - Taiichiro Miyashita
- Department of Rheumatology, National Hospital Organization Nagasaki Medical center, Nagasaki 380-8582, Japan
| | - Yoshihiro Yakushijin
- Department of Clinical Oncology, Ehime Graduate School of Medicine, Ehime 791-0295, Japan
| | - Keita Fujikawa
- Department of Rheumatology, Japan Community Healthcare Organization, Isahaya General Hospital, Nagasaki 854-8501, Japan
| | - Motohisa Yamamoto
- Department of Gastroenterology, Rheumatology and Clinical Immunology, Sapporo Medical University School of Medicine, Hokkaido 060-8543, Japan
| | - Hideaki Hamano
- Medical Informatics Division and Department of Internal Medicine, Gastroenterology, Shinshu University School Hospital, Nagano 390-8621, Japan
| | - Tomoki Origuchi
- First Department of Internal Medicine, Department of Immunology and Rheumatology, Nagasaki Graduate School of Health Sciences, Nagasaki 852-8520, Japan
| | - Shintaro Hirata
- First Department of Internal Medicine, School of Medicine, University of Occupational and Environmental Health, Japan, Fukuoka 807-8555, Japan
| | - Hiroto Tsuboi
- Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Takayuki Sumida
- Department of Internal Medicine, Faculty of Medicine, University of Tsukuba, Ibaraki 305-8575, Japan
| | - Hisanori Morimoto
- Division of Nephrology, Mitoyo General Hospital, Kagawa 769-1695, Japan
| | - Tomomi Sato
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Haruka Iwao
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Miyuki Miki
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Tomoyuki Sakai
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Yoshimasa Fujita
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Masao Tanaka
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Toshihiro Fukushima
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Toshiro Okazaki
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan
| | - Hisanori Umehara
- Hematology and Immunology, Kanazawa Medical University, Uchinada, Ishikawa 920-0293, Japan; Department of Clinical Immunology, Graduate School of Medicine and Faculty of Medicine, Kyoto University, Kyoto 606-8501, Japan
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Bakdash G, Vogelpoel LTC, van Capel TMM, Kapsenberg ML, de Jong EC. Retinoic acid primes human dendritic cells to induce gut-homing, IL-10-producing regulatory T cells. Mucosal Immunol 2015; 8:265-78. [PMID: 25027601 DOI: 10.1038/mi.2014.64] [Citation(s) in RCA: 167] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Accepted: 06/17/2014] [Indexed: 02/08/2023]
Abstract
The vitamin A metabolite all-trans retinoic acid (RA) is an important determinant of intestinal immunity. RA primes dendritic cells (DCs) to express CD103 and produce RA themselves, which induces the gut-homing receptors α4β7 and CCR9 on T cells and amplifies transforming growth factor (TGF)-β-mediated development of Foxp3(+) regulatory T (Treg) cells. Here we investigated the effect of RA on human DCs and subsequent development of T cells. We report a novel role of RA in immune regulation by showing that RA-conditioned human DCs did not substantially enhance Foxp3 but induced α4β7(+) CCR9(+) T cells expressing high levels of interleukin (IL)-10, which were functional suppressive Treg cells. IL-10 production was dependent on DC-derived RA and was maintained when DCs were stimulated with toll-like receptor ligands. Furthermore, the presence of TGF-β during RA-DC-driven T-cell priming favored the induction of Foxp3(+) Treg cells over IL-10(+) Treg cells. Experiments with naive CD4(+) T cells stimulated by anti-CD3 and anti-CD28 antibodies in the absence of DCs emphasized that RA induces IL-10 in face of inflammatory mediators. The data thus show for the first time that RA induces IL-10-producing Treg cells and postulates a novel mechanism for IL-10 in maintaining tolerance to the intestinal microbiome.
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Affiliation(s)
- G Bakdash
- Department of Cell Biology and Histology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - L T C Vogelpoel
- Department of Cell Biology and Histology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - T M M van Capel
- Department of Cell Biology and Histology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - M L Kapsenberg
- Department of Cell Biology and Histology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - E C de Jong
- Department of Cell Biology and Histology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
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Hadaschik EN, Wei X, Leiss H, Heckmann B, Niederreiter B, Steiner G, Ulrich W, Enk AH, Smolen JS, Stummvoll GH. Regulatory T cell-deficient scurfy mice develop systemic autoimmune features resembling lupus-like disease. Arthritis Res Ther 2015; 17:35. [PMID: 25890083 PMCID: PMC4391674 DOI: 10.1186/s13075-015-0538-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2014] [Accepted: 01/23/2015] [Indexed: 01/18/2023] Open
Abstract
Introduction Scurfy mice are deficient in regulatory T cells (Tregs), develop a severe, generalized autoimmune disorder that can affect almost every organ and die at an early age. Some of these manifestations resemble those found in systemic lupus erythematosus (SLE). In addition, active SLE is associated with low Treg numbers and reduced Treg function, but direct evidence for a central role of Treg malfunction in the pathophysiology of lupus-like manifestations is still missing. In the present study, we characterize the multiorgan pathology, autoantibody profile and blood count abnormalities in scurfy mice and show their close resemblances to lupus-like disease. Methods Scurfy mice have dysfunctional Tregs due to a genetic defect in the transcription factor Forkhead box protein 3 (Foxp3). We analyzed skin, joints, lung and kidneys of scurfy mice and wild-type (WT) controls by conventional histology and immunofluorescence (IF) performed hematological workups and tested for autoantibodies by IF, immunoblotting and enzyme-linked immunosorbent assay. We also analyzed the intestines, liver, spleen and heart, but did not analyze all organs known to be affected in scurfy mice (such as the testicle, the accessory reproductive structures, the pancreas or the eyes). We transferred CD4+ T cells of scurfy or WT mice into T cell-deficient B6/nude mice. Results We confirm previous reports that scurfy mice spontaneously develop severe pneumonitis and hematological abnormalities similar to those in SLE. We show that scurfy mice (but not controls) exhibited additional features of SLE: severe interface dermatitis, arthritis, mesangioproliferative glomerulonephritis and high titers of anti-nuclear antibodies, anti-double-stranded DNA antibodies, anti-histone antibodies and anti-Smith antibodies. Transfer of scurfy CD4+ T cells (but not of WT cells) induced autoantibodies and inflammation of lung, skin and kidneys in T cell-deficient B6/nude mice. Conclusion Our observations support the hypothesis that lupus-like autoimmune features develop in the absence of functional Tregs.
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Affiliation(s)
- Eva N Hadaschik
- Department of Dermatology, University of Heidelberg, Im Neuenheimer Feld 440, 69120, Heidelberg, Germany.
| | - Xiaoying Wei
- Department of Dermatology, University of Heidelberg, Im Neuenheimer Feld 440, 69120, Heidelberg, Germany. .,Department of Pathology, Affiliated Zhong-Da Hospital, Southeast University, 87 Dingjia Bridge, Gulou, 210009, Nanjing, China.
| | - Harald Leiss
- Department of Rheumatology, Medical University of Vienna, Wahringer Gurtel 18-20, 1090, Vienna, Austria.
| | - Britta Heckmann
- Department of Dermatology, University of Heidelberg, Im Neuenheimer Feld 440, 69120, Heidelberg, Germany.
| | - Birgit Niederreiter
- Department of Rheumatology, Medical University of Vienna, Wahringer Gurtel 18-20, 1090, Vienna, Austria.
| | - Günter Steiner
- Department of Rheumatology, Medical University of Vienna, Wahringer Gurtel 18-20, 1090, Vienna, Austria.
| | - Walter Ulrich
- Department of Pathology, Hietzing Hospital, Wolkersbergenstrasse 1, 1130, Vienna, Austria.
| | - Alexander H Enk
- Department of Dermatology, University of Heidelberg, Im Neuenheimer Feld 440, 69120, Heidelberg, Germany.
| | - Josef S Smolen
- Department of Rheumatology, Medical University of Vienna, Wahringer Gurtel 18-20, 1090, Vienna, Austria.
| | - Georg H Stummvoll
- Department of Rheumatology, Medical University of Vienna, Wahringer Gurtel 18-20, 1090, Vienna, Austria.
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Mayer CT, Ghorbani P, Kühl AA, Stüve P, Hegemann M, Berod L, Gershwin ME, Sparwasser T. Few Foxp3⁺ regulatory T cells are sufficient to protect adult mice from lethal autoimmunity. Eur J Immunol 2014; 44:2990-3002. [PMID: 25042334 DOI: 10.1002/eji.201344315] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 06/03/2014] [Accepted: 07/11/2014] [Indexed: 12/12/2022]
Abstract
Foxp3 specifies the Treg cell lineage and is indispensable for immune tolerance. Accordingly, rare Foxp3 mutations cause lethal autoimmunity. The mechanisms precipitating more prevalent human autoimmune diseases are poorly understood, but involve a combination of genetic and environmental factors. Many autoimmune diseases associate with a partial Treg-cell dysfunction, yet mouse models reflecting such complex pathophysiological processes are rare. Around 95% of Foxp3(+) Treg cells can be specifically depleted in bacterial artifical chromosome (BAC)-transgenic Depletion of REGulatory T cells (DEREG) mice through diphtheria toxin (DT) treatment. However, Treg-cell depletion fails to cause autoimmunity in adult DEREG mice for unclear reasons. By crossing Foxp3(GFP) knock-in mice to DEREG mice, we introduced additional genetic susceptibility that does not affect untreated mice. Strikingly, DT treatment of DEREG × Foxp3(GFP) mice rapidly causes autoimmunity characterized by blepharitis, tissue damage, and autoantibody production. This inflammatory disease is associated with augmented T-cell activation, increased Th2 cytokine production and myeloproliferation, and is caused by defective Treg-cell homeostasis, preventing few DT-insensitive Treg cells from repopulating the niche after Treg-cell depletion. Our study provides important insights into self-tolerance. We further highlight DEREG × Foxp3(GFP) mice as a model to investigate the role of environmental factors in precipitating autoimmunity. This may help to better understand and treat human autoimmunity.
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Affiliation(s)
- Christian T Mayer
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research; a joint venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
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26
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Young NA, Sharma R, Friedman AK, Kaffenberger BH, Bolon B, Jarjour WN. Aberrant muscle antigen exposure in mice is sufficient to cause myositis in a Treg cell-deficient milieu. ACTA ACUST UNITED AC 2014; 65:3259-70. [PMID: 24022275 PMCID: PMC4033530 DOI: 10.1002/art.38184] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 08/29/2013] [Indexed: 01/01/2023]
Abstract
Objective Myositis is associated with muscle-targeted inflammation and is observed in some Treg cell–deficient mouse models. Because an autoimmune pathogenesis has been strongly implicated, the aim of this study was to investigate the hypothesis that abnormal exposure to muscle antigens, as observed in muscle injury, can induce autoimmune-mediated myositis in susceptible hosts. Methods FoxP3 mutant (scurfy) mice were mated to synaptotagmin VII (Syt VII) mutant mice, which resulted in a new mouse strain that combines impaired membrane resealing with Treg cell deficiency. Lymphocyte preparations from double-mutant mice were adoptively transferred intraperitoneally, with or without purified Treg cells, into recombination-activating gene 1 (RAG-1)–null recipients. Lymph node cells from mice with the FoxP3 mutation were transferred into RAG-1–null mice either 1) intraperitoneally in conjunction with muscle homogenate or purified myosin protein or 2) intramuscularly with or without cotransfer of purified Treg cells. Results FoxP3-deficient mouse lymph node cells transferred in conjunction with myosin protein or muscle homogenate induced robust skeletal muscle inflammation. The infiltrates consisted predominantly of CD4+ and CD8+ T cells, a limited number of macrophages, and no B cells. Significant inflammation was also seen in similar experiments using lymph node cells from FoxP3/Syt VII double-mutant mice but was absent in experiments using adoptive transfer of FoxP3 mutant mouse cells alone. The cotransfer of Treg cells completely suppressed myositis. Conclusion These data, derived from a new, reproducible model, demonstrate the critical roles of Treg cell deficiency and aberrant muscle antigen exposure in the priming of autoreactive cells to induce myositis. This mouse system has multifaceted potential for examining the interplay in vivo between tissue injury and autoimmunity.
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27
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Ju ST, Sharma R, Gaskin F, Kung JT, Fu SM. The Biology of Autoimmune Response in the Scurfy Mice that Lack the CD4+Foxp3+ Regulatory T-Cells. BIOLOGY 2012; 1:18-42. [PMID: 24832045 PMCID: PMC4011033 DOI: 10.3390/biology1010018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 03/22/2012] [Accepted: 03/26/2012] [Indexed: 12/27/2022]
Abstract
Due to a mutation in the Foxp3 transcription factor, Scurfy mice lack regulatory T-cells that maintain self-tolerance of the immune system. They develop multi-organ inflammation (MOI) and die around four weeks old. The affected organs are skin, tail, lungs and liver. In humans, endocrine and gastrointestinal inflammation are also observed, hence the disease is termed IPEX (Immunodysregulation, Polyendocrinopathy, Enteropathy, X-linked) syndrome. The three week period of fatal MOI offers a useful autoimmune model in which the controls by genetics, T-cell subsets, cytokines, and effector mechanisms could be efficiently investigated. In this report, we will review published work, summarize our recent studies of Scurfy double mutants lacking specific autoimmune-related genes, discuss the cellular and cytokine controls by these genes on MOI, the organ-specificities of the MOI controlled by environments, and the effector mechanisms regulated by specific Th cytokines, including several newly identified control mechanisms for organ-specific autoimmune response.
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Affiliation(s)
- Shyr-Te Ju
- Center for Immunity, Inflammation and Regenerative Medicine, School of Medicine, University of Virginia, Charlottesville, VA 22908, USA.
| | - Rahul Sharma
- Center for Immunity, Inflammation and Regenerative Medicine, School of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - Felicia Gaskin
- Department of Psychiatry and Neurobehavioral Sciences, School of Medicine, University of Virginia, Charlottesville, VA 22908, USA
| | - John T Kung
- Academia Sinica, Nankang District, Taipei 11529, Taiwan
| | - Shu Man Fu
- Center for Immunity, Inflammation and Regenerative Medicine, School of Medicine, University of Virginia, Charlottesville, VA 22908, USA.
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28
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Miyajima M, Chase CM, Alessandrini A, Farkash EA, Della Pelle P, Benichou G, Graham JA, Madsen JC, Russell PS, Colvin RB. Early acceptance of renal allografts in mice is dependent on foxp3(+) cells. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 178:1635-45. [PMID: 21435448 DOI: 10.1016/j.ajpath.2010.12.024] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2010] [Revised: 11/03/2010] [Accepted: 12/13/2010] [Indexed: 10/18/2022]
Abstract
Mouse renal allografts have a remarkable ability to promote acceptance across full major histocompatibility complex incompatibilities in certain strain combinations without immunosuppression. The mechanism is unknown but is believed to involve immunoregulation. This study tests whether Foxp3(+) T-regulatory cells are responsible in the early phase of graft acceptance, using B6.Foxp3(DTR) mice that express diphtheria toxin receptor (DTR) in Foxp3(+) cells. The administration of DT to B6.Foxp3(DTR) recipients with accepted DBA/2 kidneys, 3 weeks to 3 months after transplantation, caused a marked depletion of Foxp3 cells and triggered acute cellular rejection, manifested by a sudden increase in blood urea nitrogen within a week. None of the controls showed an increase in blood urea nitrogen, including DT-treated B6 wild-type recipients of DBA/2 kidneys or B6.Foxp3(DTR) recipients of isografts. Accepted DBA/2 allografts showed prominent lymphoid sheaths around arteries containing numerous CD3(+)Foxp3(+) cells, CD4(+) cells, dedritic cells, and B cells, which was independent of CCR4. The lymphoid sheaths disintegrate after Foxp3 depletion, accompanied by widespread CD8 interstitial mononuclear inflammation, tubulitis, and endarteritis. The Foxp3 depletion caused an increased frequency of donor-reactive cells in the spleen by interferon (IFN) γ enzyme-linked immunosorbent spot (ELISPOT) assays and increased expression of the maturation markers, CD86 and IA(b), on dendritic cells in the spleen and kidney. We conclude that Foxp3(+) cells are needed to maintain acceptance of major histocompatibility complex-incompatible renal allografts in the first 3 months after transplantation and may act by inhibiting DC maturation.
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Affiliation(s)
- Masahiro Miyajima
- Transplantation Center, Massachusetts General Hospital, Boston, MA 02114, USA
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29
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Sharma R, Sung SSJ, Ju CYA, Deshmukh US, Fu SM, Ju ST. Regulatory T-Cell (Treg) hybridoma as a novel tool to study Foxp3 regulation and Treg fate. J Autoimmun 2011; 37:113-21. [PMID: 21621978 DOI: 10.1016/j.jaut.2011.05.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Accepted: 05/02/2011] [Indexed: 11/19/2022]
Abstract
The CD25(+)Foxp3(+) regulatory T-cells (Treg) that had lost CD25 and Foxp3 in vivo (ex-Treg) exist but are difficult to study. We generated antigen (Ag)-specific Treg hybridomas from iTreg clones (iTreg-hyb) using iTreg of DO11.10.Foxp3-GFP mice and presented evidence that they behave like ex-Treg. The iTreg-hyb displayed little CD25 and Foxp3-GFP but strong expression could be induced with OVA(323-339) in the presence of Ag-presenting cells, rIL-2 and rTGF-β1. They displayed all of the iTreg-associated markers examined except CTLA-4, the latter was also absent in the ex-Treg. They lacked the Helios transcription factor, suggesting they were derived from iTreg. Similar to ex-Treg, the iTreg-hyb produced high level of IL-2 and Foxp3 under specific activation conditions. Two unusual properties were observed. First, the ability to induce Foxp3-GFP upon activation is progressively lost in culture over a period of 2-4 weeks. Second, Rag2(-/-) spleen cells alone selectively induced Foxp3-GFP expression albeit 30 times less efficient than Ag-specific activation. We identified cell-free supernatant, IL-6, IL-9, and IL-27 as Foxp3-inducing factors. Our study has significant implications to the stability, plasticity and fate of Treg. The usefulness and limitation of iTreg-hyb as a novel tool to study Foxp3 regulation and the fate of specific Treg subsets are discussed.
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Affiliation(s)
- Rahul Sharma
- Center for Immunity, Inflammation and Regenerative Medicine, Department of Medicine, University of Virginia, Charlottesville, VA 22908-0412, USA
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30
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Sharma R, Sharma PR, Kim YC, Leitinger N, Lee JK, Fu SM, Ju ST. IL-2-controlled expression of multiple T cell trafficking genes and Th2 cytokines in the regulatory T cell-deficient scurfy mice: implication to multiorgan inflammation and control of skin and lung inflammation. THE JOURNAL OF IMMUNOLOGY 2010; 186:1268-78. [PMID: 21169543 DOI: 10.4049/jimmunol.1002677] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Scurfy (Sf) mice bear a mutation in the Foxp3 transcription factor, lack regulatory T cells (Treg), develop multiorgan inflammation, and die prematurely. The major target organs affected are skin, lungs, and liver. “Sf mice lacking the Il2 gene (Sf.Il2–/–), despite being devoid of Treg, did not develop skin and lung inflammation, but the inflammation in liver remained [corrected]. Genome-wide microarray analysis revealed hundreds of genes that were differentially regulated among Sf, Sf.Il2(-/-), and B6 CD4(+) T cells, but the most significant changes were those encoding receptors for trafficking/chemotaxis/retention and cytokines. Our study suggests that IL-2 controls the skin and lung inflammation in Sf mice in an apparent "organ-specific" manner through two novel mechanisms: by regulating the expression of genes encoding a variety of receptors for T cell trafficking/chemotaxis/retention and by regulating Th2 cell expansion and cytokine production. Thus, IL-2 is potentially a master regulator for multiorgan inflammation and an underlying etiological factor for various diseases associated with skin and lung inflammation.
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Affiliation(s)
- Rahul Sharma
- Department of Medicine, Center for Immunity, Inflammation and Regenerative Medicine, University of Virginia, Charlottesville, VA 22908, USA.
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Abstract
Gounaris and colleagues describe a previously unrecognized cross-talk between mast cells and Treg in colon adenomatous polyposis (Gounaris et al., Cancer Res 2009;69:5490-7). Adoptively transferred Treg suppress the focal mastocytosis that fosters tumor initiation and progression. In contrast, endogenous Treg, which abundantly infiltrate polyps, show proinflammatory activity under unknown microenvironmental cues that promote mast cell differentiation and expansion. Compartmentalized Treg plasticity seems to be a key factor in establishing the optimal milieu for cancer development in the intestines. Treg partnership with mast cells recapitulates the complexity of innate-adaptive networks characterizing gut inflammation and represents a novel target for cancer immunotherapy.
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Affiliation(s)
- Mario P Colombo
- Fondazione Istituto Di Ricovero e Cura a Carattere Scientifico Istituto Nazionale dei Tumori, Milan, Italy.
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