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Wang T, Wang J, Xu H, Yan H, Liu Y, Zhang N, Zhang Y, Zhang J, Xu J, Zhang L, Ge X, Meng M, Liu P, Yang Q, Qin D, Li S, He B. Salvianolic acid B alleviates autoimmunity in Treg-deficient mice via inhibiting IL2-STAT5 signaling. Phytother Res 2024. [PMID: 38887974 DOI: 10.1002/ptr.8222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 03/23/2024] [Accepted: 04/11/2024] [Indexed: 06/20/2024]
Abstract
Regulatory T cell (Treg) deficiency leads to immune dysregulation, polyendocrinopathy, enteropathy, and X-linked (IPEX) syndrome, which is a CD4+ T cell-driven autoimmune disease in both humans and mice. Despite understanding the molecular and cellular characteristics of IPEX syndrome, new treatment options have remained elusive. Here, we hypothesized that salvianolic acid B (Sal B), one of the main active ingredients of Salvia miltiorrhiza, can protect against immune disorders induced by Treg deficiency. To examine whether Sal B can inhibit Treg deficiency-induced autoimmunity, Treg-deficient scurfy (SF) mice with a mutation in forkhead box protein 3 were treated with different doses of Sal B. Immune cells, inflammatory cell infiltration, and cytokines were evaluated by flow cytometry, hematoxylin and eosin staining and enzyme-linked immunosorbent assay Kits, respectively. Moreover, RNA sequencing, western blot, and real-time PCR were adopted to investigate the molecular mechanisms of action of Sal B. Sal B prolonged lifespan and reduced inflammation in the liver and lung of SF mice. Moreover, Sal B decreased plasma levels of several inflammatory cytokines, such as IL-2, IFN-γ, IL-4, TNF-α, and IL-6, in SF mice. By analyzing the transcriptomics of livers, we determined the signaling pathways, especially the IL-2-signal transducer and activator of transcription 5 (STAT5) signaling pathway, which were associated with Treg deficiency-induced autoimmunity. Remarkably, Sal B reversed the expression of gene signatures related to the IL-2-STAT5 signaling pathway in vitro and in vivo. Sal B prolongs survival and inhibits lethal inflammation in SF mice through the IL-2-STAT5 axis. Our findings may inspire novel drug discovery efforts aimed at treating IPEX syndrome.
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Affiliation(s)
- Ting Wang
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Jing Wang
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Huan Xu
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Han Yan
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Ying Liu
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Ning Zhang
- Institute of Biopharmaceutical Research, Liaocheng University, Liaocheng, China
| | - Yawen Zhang
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Jingmin Zhang
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Jingxuan Xu
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Lei Zhang
- Shanghai Key Laboratory of Pancreatic Disease, Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiaolu Ge
- Shanghai Key Laboratory of Pancreatic Disease, Department of Gastroenterology, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Mingjing Meng
- Laboratory of Molecular Pharmacology and Drug Discovery, Institute of Chinese Materia Medica, The Fourth Clinical Medical College, Guangzhou University of Chinese Medicine, Shenzhen, Guangdong, China
| | - Peiman Liu
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Qiaozhi Yang
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Daogang Qin
- Key Laboratory for Pediatrics of Integrated Traditional and Western Medicine, Liaocheng People's Hospital, Shandong, China
| | - Sen Li
- Department of Endocrinology, Liaocheng People's Hospital, Liaocheng, Shandong, China
| | - Baokun He
- Laboratory of Molecular Pharmacology and Drug Discovery, Institute of Chinese Materia Medica, The Fourth Clinical Medical College, Guangzhou University of Chinese Medicine, Shenzhen, Guangdong, China
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Keller HR, Ligons DL, Li C, Hwang S, Luckey MA, Prakhar P, Liman N, Crossman A, Lazarevic V, Park YK, Park JH. The molecular basis and cellular effects of distinct CD103 expression on CD4 and CD8 T cells. Cell Mol Life Sci 2021; 78:5789-5805. [PMID: 34129058 DOI: 10.1007/s00018-021-03877-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 05/24/2021] [Accepted: 06/08/2021] [Indexed: 10/21/2022]
Abstract
Integrin CD103 mediates the adhesion and tissue retention of T cells by binding to E-cadherin which is abundant on epithelial cells. Notably, CD103 is highly expressed on CD8 T cells but conspicuously absent on most CD4 T cells. The mechanism controlling such lineage-specific expression of CD103 remains unclear. Using a series of genetically engineered mouse models, here, we demonstrate that the regulatory mechanism of CD103 expression is distinct between CD4 and CD8 T cells, and that the transcription factor Runx3 plays an important but not an essential role in this process. We further found that the availability of integrin β7 which heterodimerizes with CD103 was necessary but also constrained the surface expression of CD103. Notably, the forced surface expression of CD103 did not significantly alter the thymic development of conventional T cells but severely impaired the generation of MHC-II-restricted TCR transgenic T cells, revealing previously unappreciated aspects of CD103 in the selection and maturation of CD4 T cells. Unlike its effect on CD4 T cell development, however, CD103 overexpression did not significantly affect CD4 T cells in peripheral tissues. Moreover, the frequency and number of CD4 T cells in the small intestine epithelium did not increase even though E-cadherin is highly expressed in this tissue. Collectively, these results suggest that most mature CD4 T cells are refractory to the effects of CD103 expression, and that they presumably utilize CD103-independent pathways to control their tissue retention and residency.
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Affiliation(s)
- Hilary R Keller
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA.,Department of Surgery, Guthrie Robert Packer Hospital, Sayre, PA, 18840, USA
| | - Davinna L Ligons
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - Can Li
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - SuJin Hwang
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - Megan A Luckey
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - Praveen Prakhar
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - Nurcin Liman
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - Assiatu Crossman
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - Vanja Lazarevic
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA
| | - Yoo Kyoung Park
- Department of Medical Nutrition-AgeTech-Service Convergence Major, Graduate School of East-West Medical Science, Kyung Hee University, Yongin-si, Gyeonggi-do, 17104, South Korea.
| | - Jung-Hyun Park
- Experimental Immunology Branch, Center for Cancer Research, National Cancer Institute, NIH, Bethesda, MD, 20892, USA.
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Winkelmann P, Unterweger AL, Khullar D, Beigel F, Koletzko L, Siebeck M, Gropp R. The PI3K pathway as a therapeutic intervention point in inflammatory bowel disease. IMMUNITY INFLAMMATION AND DISEASE 2021; 9:804-818. [PMID: 33942546 PMCID: PMC8342202 DOI: 10.1002/iid3.435] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/26/2021] [Accepted: 03/29/2021] [Indexed: 12/31/2022]
Abstract
With glucose being the preferred source of energy in activated T cells, targeting glycolysis has become an attractive therapeutic intervention point for chronic inflammatory bowel diseases (IBD). The switch to glycolysis is mediated by phosphoinositide‐3‐kinases (PI3K) which relay signals from surface receptors to the AKT pathway. We first confirmed by analysis of the oxygen consumption rate (OCR) and extracellular acidification rate (ECAR) that metabolism is shifted towards glycolysis in IBD patients as compared to non‐IBD donors. In contrast to non‐IBD donors, OCR correlated with ECAR (IBD: cor = 0.79, p = 2E‐10; non‐IBD: cor = 0.37, p = n.s.), in IBD patients. Second, we tested the PI3K inhibitor copanlisib as a potential therapeutic. Ex vivo, copanlisib suppressed the ECAR significantly in T cells activated by anti‐CD3 antibodies and significantly decreased ECAR rates in the presence of copanlisib (anti‐CD3: 58.24 ± 29.06; copanlisib: 43.16 ± 20.23, p < .000. In addition, copanlisib impaired the activation of CD4+ CD25+ T cells (anti‐CD3: 42.15 ± 21.46; anti‐CD3 + copanlisib: 26.06 ± 21.82 p = .013) and the secretion of cytokines (IFNγ: anti‐CD3: 6332.0 ± 5707.61 pmol/ml; anti‐CD3 + copanlisib: 6332.0 ± 5707.61, p = .018). In vivo, copanlisib significantly improved the histological scores (ethanol: 8.5 ± 3.81; copanlisib: 4.57 ± 2.82, p = .006) in the NSG‐UC mouse model. Orthogonal partial least square analysis confirmed the efficacy of copanlisib. These data suggest that the PI3K pathway provides an attractive therapeutic intervention point in IBD for patients in relapse. Targeting metabolic pathways have the potential to develop phase dependent therapies.
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Affiliation(s)
- Paula Winkelmann
- Department of General, Visceral, and Transplantation Surgery, University Hospital, LMU, Munich, Germany
| | - Anna-Lena Unterweger
- Department of General, Visceral, and Transplantation Surgery, University Hospital, LMU, Munich, Germany
| | - Diya Khullar
- Department of General, Visceral, and Transplantation Surgery, University Hospital, LMU, Munich, Germany
| | - Florian Beigel
- Department of Medicine II, University Hospital, LMU, München, Germany
| | - Leandra Koletzko
- Department of Medicine II, University Hospital, LMU, München, Germany
| | - Matthias Siebeck
- Department of General, Visceral, and Transplantation Surgery, University Hospital, LMU, Munich, Germany
| | - Roswitha Gropp
- Department of General, Visceral, and Transplantation Surgery, University Hospital, LMU, Munich, Germany
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IL233, an IL-2-IL-33 hybrid cytokine induces prolonged remission of mouse lupus nephritis by targeting Treg cells as a single therapeutic agent. J Autoimmun 2019; 102:133-141. [PMID: 31103267 DOI: 10.1016/j.jaut.2019.05.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 05/01/2019] [Accepted: 05/04/2019] [Indexed: 12/29/2022]
Abstract
Lupus glomerulonephritis (GN) is an autoimmune disease characterized by immune complex-deposition, complement activation and glomerular inflammation. In lupus-prone NZM2328 mice, the occurrence of lupus GN was accompanied by a decrease in Treg cells and an increase in proinflammatory cytokine-producing T cells. Because IL-33 in addition to IL-2 has been shown to be important for Treg cell proliferation and ST2 (IL-33 receptor) positive Treg cells are more potent in suppressor activity, a hybrid cytokine with active domains of IL-2 and IL-33 was generated to target the ST2+ Treg cells as a therapeutic agent to treat lupus GN. Three mouse models were used: spontaneous and Ad-IFNα- accelerated lupus GN in NZM2328 and the lymphoproliferative autoimmune GN in MRL/lpr mice. Daily injections of IL233 for 5 days prevented Ad-IFNα-induced lupus GN and induced remission of spontaneous lupus GN. The remission was permanent in that no relapses were detected. The remission was accompanied by persistent elevation of Treg cells in the renal lymph nodes. IL233 is more potent than IL-2 and IL-33 either singly or in combination in the treatment of lupus GN. The results of this study support the thesis that IL233 should be considered as a novel agent for treating lupus GN.
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Sharma R, Kinsey GR. Regulatory T cells in acute and chronic kidney diseases. Am J Physiol Renal Physiol 2018; 314:F679-F698. [PMID: 28877881 PMCID: PMC6031912 DOI: 10.1152/ajprenal.00236.2017] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Revised: 08/18/2017] [Accepted: 09/04/2017] [Indexed: 02/07/2023] Open
Abstract
Foxp3-expressing CD4+ regulatory T cells (Tregs) make up one subset of the helper T cells (Th) and are one of the major mechanisms of peripheral tolerance. Tregs prevent abnormal activation of the immune system throughout the lifespan, thus protecting from autoimmune and inflammatory diseases. Recent studies have elucidated the role of Tregs beyond autoimmunity. Tregs play important functions in controlling not only innate and adaptive immune cell activation, but also regulate nonimmune cell function during insults and injury. Inflammation contributes to a multitude of acute and chronic diseases affecting the kidneys. This review examines the role of Tregs in pathogenesis of renal inflammatory diseases and explores the approaches for enhancing Tregs for prevention and therapy of renal inflammation.
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Affiliation(s)
- Rahul Sharma
- Division of Nephrology and Center for Immunity, Inflammation and Regenerative Medicine, Department of Medicine, University of Virginia , Charlottesville, Virginia
| | - Gilbert R Kinsey
- Division of Nephrology and Center for Immunity, Inflammation and Regenerative Medicine, Department of Medicine, University of Virginia , Charlottesville, Virginia
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Humblet-Baron S, Franckaert D, Dooley J, Bornschein S, Cauwe B, Schönefeldt S, Bossuyt X, Matthys P, Baron F, Wouters C, Liston A. IL-2 consumption by highly activated CD8 T cells induces regulatory T-cell dysfunction in patients with hemophagocytic lymphohistiocytosis. J Allergy Clin Immunol 2016; 138:200-209.e8. [PMID: 26947179 DOI: 10.1016/j.jaci.2015.12.1314] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Revised: 11/25/2015] [Accepted: 12/14/2015] [Indexed: 12/15/2022]
Abstract
BACKGROUND Hemophagocytic lymphohistiocytosis (HLH) is a severe inflammatory condition driven by excessive CD8(+) T-cell activation. HLH occurs as both acquired and familial hemophagocytic lymphohistiocytosis (FHL) forms. In both conditions, a sterile or infectious trigger is required for disease initiation, which then becomes self-sustaining and life-threatening. Recent studies have attributed the key distal event to excessive IFN-γ production; however, the proximal events driving immune dysregulation have remained undefined. OBJECTIVE We sought to investigate the role of regulatory T (Treg) cells in the pathophysiology of experimental FHL. METHODS Because mutation in perforin is a common cause of FHL, we used an experimental FHL mouse model in which disease in perforin-deficient mice is triggered by lymphocytic choriomeningitis virus (LCMV). We assessed Treg and CD8(+) T-cell homeostasis and activation during the changing systemic conditions in the mice. In addition, human blood samples were collected and analyzed during the HLH episode. RESULTS We found no primary Treg cell defects in perforin-deficient mice. However, Treg cell numbers collapsed after LCMV inoculation. The collapse of Treg cell numbers in LCMV-triggered perforin-deficient, but not wild-type, mice was accompanied by the combination of lower IL-2 secretion by conventional CD4(+) T cells, increased IL-2 consumption by activated CD8(+) T cells, and secretion of competitive soluble CD25. Moreover low Treg cell numbers were observed in untreated patients experiencing HLH flares. CONCLUSION These results demonstrate that excessive CD8(+) T-cell activation rewires the IL-2 homeostatic network away from Treg cell maintenance and toward feed-forward inflammation. These results also provide a potential mechanistic pathway for the progression of infectious inflammation to persistent inflammation in patients with HLH.
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Affiliation(s)
- Stéphanie Humblet-Baron
- Translational Immunology Laboratory, VIB, Leuven, Belgium; Department of Microbiology and Immunology, KUL-University of Leuven, Leuven, Belgium
| | - Dean Franckaert
- Translational Immunology Laboratory, VIB, Leuven, Belgium; Department of Microbiology and Immunology, KUL-University of Leuven, Leuven, Belgium
| | - James Dooley
- Translational Immunology Laboratory, VIB, Leuven, Belgium; Department of Microbiology and Immunology, KUL-University of Leuven, Leuven, Belgium
| | - Simon Bornschein
- Translational Immunology Laboratory, VIB, Leuven, Belgium; Department of Microbiology and Immunology, KUL-University of Leuven, Leuven, Belgium
| | - Bénédicte Cauwe
- Translational Immunology Laboratory, VIB, Leuven, Belgium; Department of Microbiology and Immunology, KUL-University of Leuven, Leuven, Belgium
| | - Susann Schönefeldt
- Translational Immunology Laboratory, VIB, Leuven, Belgium; Department of Microbiology and Immunology, KUL-University of Leuven, Leuven, Belgium
| | - Xavier Bossuyt
- Department of Microbiology and Immunology, KUL-University of Leuven, Leuven, Belgium; University Hospitals Leuven, Leuven, Belgium
| | | | - Frédéric Baron
- GIGA I(3) and the Department of Hematology, University of Liège, Liege, Belgium
| | - Carine Wouters
- University Hospitals Leuven, Leuven, Belgium; Pediatric Immunology, KUL-University of Leuven, Leuven, Belgium
| | - Adrian Liston
- Translational Immunology Laboratory, VIB, Leuven, Belgium; Department of Microbiology and Immunology, KUL-University of Leuven, Leuven, Belgium.
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Xia M, Hu S, Fu Y, Jin W, Yi Q, Matsui Y, Yang J, McDowell MA, Sarkar S, Kalia V, Xiong N. CCR10 regulates balanced maintenance and function of resident regulatory and effector T cells to promote immune homeostasis in the skin. J Allergy Clin Immunol 2014; 134:634-644.e10. [PMID: 24767879 DOI: 10.1016/j.jaci.2014.03.010] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 03/16/2014] [Accepted: 03/19/2014] [Indexed: 12/21/2022]
Abstract
BACKGROUND CCR10 and CCL27 make up the most skin-specific chemokine receptor/ligand pair implicated in skin allergy and inflammatory diseases, including atopic dermatitis and psoriasis. This pair is thought to regulate the migration, maintenance, or both of skin T cells and is suggested to be therapeutic targets for treatment of skin diseases. However, the functional importance of CCR10/CCL27 in vivo remains elusive. OBJECTIVE We sought to determine the expression and function of CCR10 in different subsets of skin T cells under both homeostatic and inflammatory conditions to gain a mechanistic insight into the potential roles of CCR10 during skin inflammation. METHODS Using heterozygous and homozygous CCR10 knockout/enhanced green fluorescent protein knockin mice, we assessed the expression of CCR10 on regulatory and effector T cells of healthy and inflamed skin induced by chemicals, pathogens, and autoreactive T cells. In addition, we assessed the effect of CCR10 knockout on the maintenance and functions of different T cells and inflammatory status in the skin during different phases of the immune response. RESULTS CCR10 expression is preferentially induced on memory-like skin-resident T cells and their progenitors for their maintenance in homeostatic skin but not expressed on most skin-infiltrating effector T cells during inflammation. In CCR10 knockout mice the imbalanced presence and dysregulated function of resident regulatory and effector T cells result in over-reactive and prolonged innate and memory responses in the skin, leading to increased clearance of Leishmania species infection in the skin. CONCLUSION CCR10 is a critical regulator of skin immune homeostasis.
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Affiliation(s)
- Mingcan Xia
- Centre for Molecular Immunology and Infectious Disease, Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, Pa
| | - Shaomin Hu
- Centre for Molecular Immunology and Infectious Disease, Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, Pa
| | - Yaoyao Fu
- Centre for Molecular Immunology and Infectious Disease, Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, Pa
| | - Wensen Jin
- Teaching and Research Section of Nuclear Medicine, Anhui Medical University, Anhui, China
| | - Qiyi Yi
- Teaching and Research Section of Nuclear Medicine, Anhui Medical University, Anhui, China
| | - Yurika Matsui
- Cell and Development Biology Graduate Program, Pennsylvania State University, University Park, Pa
| | - Jie Yang
- Centre for Molecular Immunology and Infectious Disease, Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, Pa
| | - Mary Ann McDowell
- Eck Institute for Global Health, Department of Biological Sciences, University of Notre Dame, Notre Dame, Ind
| | - Surojit Sarkar
- Centre for Molecular Immunology and Infectious Disease, Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, Pa
| | - Vandana Kalia
- Centre for Molecular Immunology and Infectious Disease, Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, Pa
| | - Na Xiong
- Centre for Molecular Immunology and Infectious Disease, Department of Veterinary and Biomedical Sciences, Pennsylvania State University, University Park, Pa.
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Rajasekaran N, Wang N, Truong P, Rinderknecht C, Macaubas C, Beilhack GF, Shizuru JA, Mellins ED. Host-derived CD4+ T cells attenuate stem cell-mediated transfer of autoimmune arthritis in lethally irradiated C57BL/6.g7 mice. ACTA ACUST UNITED AC 2013; 65:681-92. [PMID: 23233229 DOI: 10.1002/art.37800] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Accepted: 11/15/2012] [Indexed: 12/11/2022]
Abstract
OBJECTIVE In the K/BxN mouse model of inflammatory arthritis, T cells carrying a transgenic T cell receptor initiate disease by helping B cells to produce arthritogenic anti-glucose-6-phosphate isomerase (anti-GPI) autoantibodies. We found that lethally- irradiated lymphocyte-deficient C57BL/6 (B6).g7 (I-A(g7) +) recombinase-activating gene-deficient (Rag(-/-)) mice reconstituted with K/BxN hematopoietic stem and progenitor cells exhibit arthritis by week 4. In contrast, healthy B6.g7 recipients of K/BxN hematopoietic stem and progenitor cells show only mild arthritis, with limited extent and duration. The objective of this study was to investigate the factors responsible for the attenuation of arthritis in B6.g7 recipients. METHODS Antibody responses were measured by enzyme-linked immunosorbent assay. Fluorescence-activated cell sorting analyses were performed for testing chimerism, expression of markers of activation and suppression, tetramer binding, and intracellular cytokines in CD4+ T cells. Suppressive activity of CD4+ T cells was studied by adoptive transfer. RESULTS Titers of anti-GPI antibodies in reconstituted B6.g7 mice were ∼60-fold lower than in reconstituted B6.g7 Rag(-/-) mice. Examination of chimerism in the reconstituted B6.g7 mice showed that B cells and myeloid cells in these mice were donor derived, but CD4+ T cells were primarily host derived and enriched for cells expressing the conventional regulatory markers CD25 and FoxP3. Notably, CD4+CD25-FoxP3- T cells expressed markers of suppressive function (CD73 and folate receptor 4), and delayed disease after adoptive transfer. Activation of donor-derived CD4+ T cells was reduced, and thymic deletion of these cells appeared increased. CONCLUSION Despite myeloablation, host CD4+ T cells having a regulatory phenotype emerge in these mice and attenuate autoimmunity.
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Gunnlaugsdottir B, Maggadottir SM, Skaftadottir I, Ludviksson BR. TheEx VivoInduction of Human CD103+CD25hiFoxp3+CD4+and CD8+Tregs is IL-2 and TGF-β1 Dependent. Scand J Immunol 2013; 77:125-34. [DOI: 10.1111/sji.12009] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2012] [Accepted: 10/07/2012] [Indexed: 12/28/2022]
Affiliation(s)
| | | | - I. Skaftadottir
- Faculty of Medicine; University of Iceland; Reykjavik; Iceland
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Yoshino M, Okuyama K, Murata A, Tomura M, Hayashi SI. CCR7-independent transport of skin antigens occurs in the dermis. Eur J Immunol 2012; 42:1459-67. [PMID: 22622847 DOI: 10.1002/eji.201142114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2011] [Revised: 02/10/2012] [Accepted: 03/05/2012] [Indexed: 11/10/2022]
Abstract
Under homeostatic conditions, skin DCs migrate to regional LNs transporting self-antigens (self-Ags). The transport of self-Ags is considered to be critical for maintaining peripheral tolerance. Although the chemokine receptor CCR7 potently induces the migration of skin DCs to regional LNs, Ccr7(-/-) (Ccr7-KO) mice do not show skin auto-immune diseases. To resolve this inconsistency, we examined Ccr7-KO epidermis- or dermis-hyperpigmented transgenic (Tg) mice, in which the transport of skin self-Ags is traceable by melanin granules (MGs). Under CCR7-deficient conditions, the transport of epidermal MGs to regional LNs was impaired at 7 weeks of age. However, epidermal MGs could be transported when they had accumulated in the dermis. Ccr7-KO-dermis-pigmented Tg mice confirmed the presence of CCR7-independent transport from the dermis. Compared with WT-dermis-pigmented Tg mice, the amount of transported melanin and number of MG-laden CD11c(+) cells were both approximately 40% of the WT levels, while the number of MG-laden CD205(+) or CD207(+) cells decreased to about 10% in skin regional LNs of Ccr7-KO-dermis-pigmented Tg mice. Cell sorting highlighted the involvement of CD11c(+) cells in the CCR7-independent transport. Here, we show that CCR7-independent transport of skin self-Ags occurs in the dermis. This system might contribute to the continuous transport of self-Ags, and maintain peripheral tolerance.
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Affiliation(s)
- Miya Yoshino
- Division of Immunology, Department of Molecular and Cellular Biology, School of Life Science, Faculty of Medicine, Tottori University, Tottori, Japan.
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Hoehlig K, Shen P, Lampropoulou V, Roch T, Malissen B, O'Connor R, Ries S, Hilgenberg E, Anderton SM, Fillatreau S. Activation of CD4⁺ Foxp3⁺ regulatory T cells proceeds normally in the absence of B cells during EAE. Eur J Immunol 2012; 42:1164-73. [PMID: 22539290 DOI: 10.1002/eji.201142242] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
B cells and regulatory T (Treg) cells can both facilitate remission from experimental auto immune encephalomyelitis (EAE), a disease of the central nervous system (CNS) used as a model for multiple sclerosis (MS). Considering that B-cell-depletion therapy (BCDT) is used to treat MS patients, we asked whether Treg-cell activation depended on B cells during EAE. Treg-cell proliferation, accumulation in CNS, and augmentation of suppressive activity in the CNS were normal in B-cell-deficient mice, indicating that B cells are not essential for activation of the protective Treg-cell response and thus provide an independent layer of regulation. This function of B cells involved early suppression of the encephalitogenic CD4(+) T-cell response, which was enhanced in B-cell-deficient mice. CD4(+) T-cell depletion was sufficient to intercept the transition from acute-to-chronic EAE when applied to B-cell-deficient animals that just reached the peak of disease severity. Intriguingly, this treatment did not improve disease when applied later, implying that chronic disability was ultimately maintained independently of pathogenic CD4(+) T cells. Collectively, our data indicate that BCDT is unlikely to impair Treg-cell function, yet it might produce undesirable effects on T-cell-mediated autoimmune pathogenesis.
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Affiliation(s)
- Kai Hoehlig
- Deutsches Rheuma-ForschungsZentrum a Leibniz Institute, Berlin, Germany
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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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Sharma R, Sung SSJ, Gaskin F, Fu SM, Ju ST. A novel function of IL-2: chemokine/chemoattractant/retention receptor genes induction in Th subsets for skin and lung inflammation. J Autoimmun 2012; 38:322-31. [PMID: 22464450 DOI: 10.1016/j.jaut.2012.02.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Accepted: 02/23/2012] [Indexed: 11/28/2022]
Abstract
The Foxp3(+)CD4(+) regulatory T-cell (Treg)-deficient Scurfy (Sf) mice rapidly develop severe inflammation in the skin and lungs with expanded Th subsets bearing increased expression of various chemokine/chemoattractant/retention receptor genes (CRG). Nine different double mutants were generated to elucidate their roles in the skin and lung inflammation. The expanded Th2 response and the increased expression of several CRG for the skin and lung inflammation were inhibited in Sf.Il2(-/-) mice as previously described using microarray analysis. Herein in a reciprocal approach, we demonstrated that Sf.Il4(-/-) and Sf.Stat6(-/-) mice, despite lacking Th2 cytokines IL-4, IL-5, and IL-13, as well as the IL-4/STAT6-dependent CRG expression, the inflammation in the skin and lungs remained. The effect of the other Th1 cytokine IFN-γ was studied in Sf.Ifng(-/-) mice in which the multi-organ inflammation (MOI) was delayed but fully developed afterward with enhanced CRG expression except for the IFN-γ-dependent Cxcr3 in CD4(+) T-cells. Similarly, a transient delay of MOI was observed for Sf.Itgae(-/-) mice but their Th subsets and the critical CRG expansion remained. Ltb4r1(-/-), Alox5(-/-), Cx3cr1(gfp/gfp), or Il10(-/-) mutant genes also failed to effectively block inflammation in the skin and lungs in Sf mice. Our study has identified a novel function of IL-2 as a powerful Th1 cytokine that induces a panel of CRG in Th subsets required for skin and lung inflammation in Sf mice. The CRG panel induced by IL-2 but not by IL-4 or IFN-γ explains the apparent "organ-specific" display of the skin and lung inflammation in Sf mice.
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Affiliation(s)
- Rahul Sharma
- Center for Immunity, Inflammation and Regenerative Medicine, Department of Medicine, School of Medicine, Charlottesville, University of Virginia, VA 22908, USA.
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Ganesh BB, Bhattacharya P, Gopisetty A, Prabhakar BS. Role of cytokines in the pathogenesis and suppression of thyroid autoimmunity. J Interferon Cytokine Res 2011; 31:721-31. [PMID: 21823922 DOI: 10.1089/jir.2011.0049] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Autoimmune thyroid diseases (AITD) are one of the most common organ-specific autoimmune disorders, of which Hashimoto's thyroiditis (HT) and Graves' disease (GD) are 2 of the most common clinical expressions. HT is characterized by hypothyroidism that results from the destruction of the thyroid by thyroglobulin-specific T cell-mediated autoimmune response. In contrast, GD is characterized by hyperthyroidism due to excessive production of thyroid hormone induced by thyrotropin receptor-specific stimulatory autoantibodies. Cytokines play a crucial role in modulating immune responses that affect the balance between maintenance of self-tolerance and initiation of autoimmunity. However, the role of cytokines is often confusing and is neither independent nor exclusive of other immune mediators. A regulatory cytokine may either favor induction of tolerance against thyroid autoimmune disease or favor activation and/or exacerbation of autoimmune responses. These apparently contradictory functions of a given cytokine are primarily influenced by the nature of co-signaling delivered by other cytokines. Consequently, a thorough understanding of the role of a particular cytokine in the context of a specific immune response is essential for the development of appropriate strategies to modulate cytokine responses to maintain or restore health. This review provides a summary of recent research pertaining to the role of cytokines in the pathogenesis of AITD with a particular emphasis on the therapeutic applications of cytokine modulation.
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Affiliation(s)
- Balaji B Ganesh
- Department of Microbiology and Immunology, Research Resources Center, College of Medicine, University of Illinois at Chicago, Illinois, USA
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Sharma R, Fu SM, Ju ST. IL-2: a two-faced master regulator of autoimmunity. J Autoimmun 2011; 36:91-7. [PMID: 21282039 DOI: 10.1016/j.jaut.2011.01.001] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2010] [Revised: 01/05/2011] [Accepted: 01/06/2011] [Indexed: 01/07/2023]
Abstract
CD4(+) T-cell (Th) cytokines provide important regulatory and effector functions of T-cells. Among them, IL-2 plays a unique role. IL-2 is required for the generation and maintenance of regulatory T-cells (Treg) to provide lifelong protection from autoimmune disease. Whether IL-2 is also required for autoimmune disease development is less clear as Il2(-/)(-) mice themselves spontaneously develop multi-organ inflammation (MOI). In this communication, we discuss evidence that support the thesis that IL-2 is required for the development of autoimmune response, although some aspects of autoimmune response are not regulated by IL-2. Potential IL-2-dependent mechanisms operating at specific stages of the inflammation process are presented. The interplays among Treg, IL-2, autoimmune response and adaptive immunity are discussed. Overall, available information indicates that IL-2 is a two-faced master regulator of autoimmunity: one to prevent autoimmunity while the other promotes autoimmune response. The latter is an unfortunate consequence of IL-2 function that is used to promote the adaptive immune response against foreign antigens and pathogens.
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Affiliation(s)
- Rahul Sharma
- Center for Immunity, Inflammation and Regenerative Medicine, Department of Medicine, University of Virginia, VA, USA
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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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Takimoto T, Wakabayashi Y, Sekiya T, Inoue N, Morita R, Ichiyama K, Takahashi R, Asakawa M, Muto G, Mori T, Hasegawa E, Saika S, Shizuya S, Hara T, Nomura M, Yoshimura A. Smad2 and Smad3 are redundantly essential for the TGF-beta-mediated regulation of regulatory T plasticity and Th1 development. THE JOURNAL OF IMMUNOLOGY 2010; 185:842-55. [PMID: 20548029 DOI: 10.4049/jimmunol.0904100] [Citation(s) in RCA: 249] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Although it has been well established that TGF-beta plays a pivotal role in immune regulation, the roles of its downstream transcription factors, Smad2 and Smad3, have not been fully clarified. Specifically, the function of Smad2 in the immune system has not been investigated because of the embryonic lethality of Smad2-deficient mice. In this study, we generated T cell-specific Smad2 conditional knockout (KO) mice and unexpectedly found that Smad2 and Smad3 were redundantly essential for TGF-beta-mediated induction of Foxp3-expressing regulatory T cells and suppression of IFN-gamma production in CD4(+) T cells. Consistent with these observations, Smad2/Smad3-double KO mice, but not single KO mice, developed fatal inflammatory diseases with higher IFN-gamma production and reduced Foxp3 expression in CD4(+) T cells at the periphery. Although it has been suggested that Foxp3 induction might underlie TGF-beta-mediated immunosuppression, TGF-beta still can suppress Th1 cell development in Foxp3-deficient T cells, suggesting that the Smad2/3 pathway inhibits Th1 cell development with Foxp3-independent mechanisms. We also found that Th17 cell development was reduced in Smad-deficient CD4(+) T cells because of higher production of Th17-inhibitory cytokines from these T cells. However, TGF-beta-mediated induction of RORgamma t, a master regulator of Th17 cell, was independent of both Smad2 and Smad3, suggesting that TGF-beta regulates Th17 development through Smad2/3-dependent and -independent mechanisms.
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Affiliation(s)
- Tomohito Takimoto
- Department of Microbiology and Immunology, Keio University School of Medicine, Shinjyuku-ku, Tokyo, Japan
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Sharma R, Ju ST. Genetic control of the inflammatory T-cell response in regulatory T-cell deficient scurfy mice. Clin Immunol 2010; 136:162-9. [PMID: 20452830 DOI: 10.1016/j.clim.2010.04.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2010] [Revised: 04/06/2010] [Accepted: 04/07/2010] [Indexed: 11/18/2022]
Abstract
IPEX (Immunodysregulation, polyendocrinopathy, enteropathy, X-linked) syndrome is a rare, recessive disorder in patients with mutations in the foxp3 gene, the normal expression of which is required for the generation of functional regulatory T-cells. Scurfy mice also bear a mutation in the foxp3, and like IPEX patients, spontaneously develop multi-organ inflammation. As reviewed herein, breeding immune response genes into Scurfy mice has provided useful insight into how the inflammatory T-cell response is regulated in the absence of regulatory T-cells and post regulatory T-cell checkpoint. Of particular interest are those that preferentially affect the inflammatory T-cell response in an "apparent" organ-specific manner, implying that specific mechanisms of control exist for individual organs during multi-organ inflammation.
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Affiliation(s)
- Rahul Sharma
- Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA
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Esposito M, Ruffini F, Bellone M, Gagliani N, Battaglia M, Martino G, Furlan R. Rapamycin inhibits relapsing experimental autoimmune encephalomyelitis by both effector and regulatory T cells modulation. J Neuroimmunol 2010; 220:52-63. [PMID: 20149931 DOI: 10.1016/j.jneuroim.2010.01.001] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Revised: 01/05/2010] [Accepted: 01/05/2010] [Indexed: 01/13/2023]
Abstract
Rapamycin is an oral immunosuppressant drug previously reported to efficiently induce naturally occurring CD4(+)CD25(+)FoxP3(+) regulatory T ((n)T(reg)) cells re-establishing long-term immune self-tolerance in autoimmune diseases. We investigated the effect of rapamycin administration to SJL/j mice affected by PLP(139-151)-induced relapsing-remitting experimental autoimmune encephalomyelitis (RR-EAE). We found that oral or intraperitoneal treatment at the peak of disease or at the end of the first clinical attack, dramatically ameliorated the clinical course of RR-EAE. Treatment suspension resulted in early reappearance of disease. Clinical response was associated with reduced central nervous system demyelination and axonal loss. Rapamycin induced suppression of IFN-gamma, and IL-17 release from antigen-specific T cells in peripheral lymphoid organs. While CD4(+)FoxP3(+) cells were unaffected, we observed disappearance of CD4(+)CD45RB(high) effector T (T(eff)) cells and selective expansion of T(reg) cells bearing the CD4(+)CD45RB(low)FoxP3(+)CD25(+)CD103(+) extended phenotype. Finally, the dual action of rapamycin on both T(eff) and T(reg) cells resulted in modulation of their ratio that closely paralleled disease course. Our data show that rapamycin inhibits RR-EAE, provide evidence for the immunological mechanisms, and indicate this compound as a potential candidate for the treatment of multiple sclerosis.
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Affiliation(s)
- Marianna Esposito
- Clinical Neuroimmunology Unit, Department of Neuroscience, Institute of Experimental Neurology, San Raffaele Scientific Institute DIBIT, Milan, Italy
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Sharma R, Deshmukh US, Zheng L, Fu SM, Ju ST. X-linked Foxp3 (Scurfy) mutation dominantly inhibits submandibular gland development and inflammation respectively through adaptive and innate immune mechanisms. THE JOURNAL OF IMMUNOLOGY 2009; 183:3212-8. [PMID: 19648271 DOI: 10.4049/jimmunol.0804355] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Scurfy (Foxp3(Sf)/Y), Il2(-/-), and Il2ralpha(-/-) mice are deficient in CD4(+)Foxp3(+) regulatory T cells (Treg), but only the latter two develop inflammation in the submandibular gland (SMG), a critical target of Sjögren's syndrome. In this study, we investigated the reason that SMG of Scurfy (Sf), Sf.Il2(-/-), Sf.Il2ralpha(-/-), and the long-lived Sf.Fas(lpr/lpr) mice remained free of inflammation, even though their lymph node cells induced SMG inflammation in Rag1(-/-) recipients. A strong correlation was observed between the development of the granular convoluted tubules (GCT) of the SMG in these mice and SMG resistance to inflammation. Moreover, GCT development in Sf.Rag1(-/-) mice was not impeded, indicating a role of adaptive immunity. In the Sf.Fas(lpr/lpr) mice, this block was linked to atrophy and inflammation in the accessory reproductive organs. Testosterone treatment restored GCT expression, but did not induce SMG inflammation, indicating GCT is not required for inflammation and additional mechanisms were controlling SMG inflammation. Conversely, oral application of LPS induced SMG inflammation, but not GCT expression. LPS treatment induced up-regulation of several chemokines in SMG with little effect on the chemokine receptors on CD4(+) T cells in Sf mice. Our study demonstrates that Sf mutation affects SMG development through adaptive immunity against accessory reproductive organs, and the manifestation of SMG inflammation in Sf mice is critically controlled through innate immunity.
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Affiliation(s)
- Rahul Sharma
- Center for Inflammation, Immunity, and Regenerative Medicine, Department of Medicine, University of Virginia, Charlottesville, VA 22908-0412, USA
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Sharma R, Sung SSJ, Fu SM, Ju ST. Regulation of multi-organ inflammation in the regulatory T cell-deficient scurfy mice. J Biomed Sci 2009; 16:20. [PMID: 19272184 PMCID: PMC2653523 DOI: 10.1186/1423-0127-16-20] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2009] [Accepted: 02/12/2009] [Indexed: 01/07/2023] Open
Abstract
Scurfy mice display the most severe form of multi-organ inflammation due to total lack of the CD4+Foxp3+ regulatory T cells (Treg) resulted from a mutation of the X-linked transcription factor Foxp3. A large repertoire of Treg-suppressible, inflammation-inducing T cells was demonstrated by adoptive transfer experiments using Rag1-/- mice as recipients and by prolongation of lifespan through breeding with Faslpr/lpr mutant. Inflammation in the ear, eyes, skin, tail, salivary glands, lungs, stomach, pancreas, liver, small intestine, colon, skeletal muscle, and accessory reproductive organs are identified. Genetic and cellular regulations of specific organ inflammation are described. Sf mice may be useful for the identification of organ-specific antigens and Treg capable of suppressing inflammation in an organ-specific manner. Sf mice are also useful to determine the important inflammation process at the checkpoint after Treg regulation using genetic analysis through breeding.
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Affiliation(s)
- Rahul Sharma
- Center for Immunity, Inflammation, and Regenerative Medicine, Department of Medicine, University of Virginia, Charlottesville, VA 22908, USA.
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