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Sayson SL, Fan JN, Ku CL, Lo JF, Chou SH. DNAJA3 regulates B cell development and immune function. Biomed J 2024; 47:100628. [PMID: 37487907 PMCID: PMC10966173 DOI: 10.1016/j.bj.2023.100628] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 06/28/2023] [Accepted: 07/08/2023] [Indexed: 07/26/2023] Open
Abstract
BACKGROUND DnaJ homolog subfamily A member 3 (DNAJA3), also known as the tumorous imaginal disc (Tid1), is shown to be crucial in T cell development. DNAJA3 functions as a tumor suppressor implicated in lymphocyte development and survival. However, the role of DNAJA3 in B cell development and immune function remains unknown. In this study, we utilized a mouse model of B cell-specific DNAJA3 knockout (CD19-Cre/+; DNAJA3flx/flx) to investigate the physiological function of DNAJA3 in B cell development and immune function. METHODS We characterized B cell populations in various developmental stages and examined mitochondrial content and function between control and DNAJA3 KO using flow cytometry analysis. DNAJA3 and OXPHOS protein complexes in sorted B cells between mice groups were compared using immunoblot techniques. The activity of B cell blastogenesis in splenocytes was measured by performing CFSE and MTT assays. Furthermore, immunoglobulin production was detected using the ELISA method. RESULTS DNAJA3 deficiency decreases from pro B cells to immature B cells. The overall B220+ population in the bone marrow and secondary immune organs also decreased. B cell subpopulations B1 (B1b) and B2 significantly decrease. The B cell blastogenesis activity and immunoglobulin production decreased in DNAJA3 KO mice. Mechanistically, DNAJA3 deficiency significantly increases dysfunctional mitochondria activity and decreases mitochondrial mass, membrane potential, and mitochondria respiratory complex proteins. These factors could have influenced B cell differentiation during development, differentiation to antibody-secreting cells, and immune activation. CONCLUSION Overall, our study provides supportive evidence for the role of DNAJA3 in B cell development and function.
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Affiliation(s)
- Stephanie L Sayson
- Department of Life Science, Fu-Jen Catholic University, New Taipei, Taiwan; Institute of Applied Science & Engineering, Fu-Jen Catholic University, New Taipei, Taiwan
| | - Jia-Ning Fan
- Department of Life Science, Fu-Jen Catholic University, New Taipei, Taiwan
| | - Chien-Liang Ku
- Institute of Oral Biology, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Jeng-Fan Lo
- Department of Dentistry, College of Dentistry, National Yang Ming Chiao Tung University, Taipei, Taiwan; Institute of Oral Biology, National Yang Ming Chiao Tung University, Taipei, Taiwan; Cancer and Immunology Research Center, National Yang Ming Chiao Tung University, Taipei, Taiwan; Department of Dentistry, Taipei Veterans General Hospital, Taipei, Taiwan.
| | - Shiu-Huey Chou
- Department of Life Science, Fu-Jen Catholic University, New Taipei, Taiwan; Institute of Applied Science & Engineering, Fu-Jen Catholic University, New Taipei, Taiwan.
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Zhang W, Xu X, Zhang R, Tian Y, Ma X, Wang X, Jiang Y, Man C. Stress-Induced Immunosuppression Inhibits Regional Immune Responses in Chicken Adipose Tissue Partially through Suppressing T Cells by Up-Regulating Steroid Metabolism. Animals (Basel) 2024; 14:225. [PMID: 38254394 PMCID: PMC10812502 DOI: 10.3390/ani14020225] [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: 11/21/2023] [Revised: 12/31/2023] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Lipid metabolism plays an important role in maintaining lipid homeostasis and regulating immune functions. However, the regulations and mechanisms of lipid metabolism on the regional immune function of avian adipose tissue (AT) have not been reported. In this study, qRT-PCR was used to investigate the changes and relationships of different lipid metabolism pathways in chicken AT during stress-induced immunosuppression (SIIS) inhibiting immune response to Newcastle disease virus vaccine, then the miRNA regulation patterns of 3-hydroxy-3-methylglutaryl-CoA reductase (HMGCR) gene and its potential applications were further identified. The results showed that AT actively responded to SIIS, and ATGL, CPT1A and HMGCR were all the key genes involved in the processes of SIIS inhibiting the immune responses. SIIS significantly inhibited the natural and specific immune phases of the primary immune response and the initiation phase of the secondary immune response in AT by suppressing T cells by up-regulating steroid anabolism. Moreover, steroid metabolism could play dual roles in regulating the regional immune functions of AT. The miR-29a/c-3p-HMGCR network was a potential regulation mechanism of steroid metabolism in AT, and serum circulating miR-29a/c-3p had the potential as molecular markers. The study can provide valuable references for an in-depth investigation of the regional immune functions regulated by lipid metabolism in AT.
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Affiliation(s)
| | | | | | | | | | | | | | - Chaolai Man
- College of Life Science and Technology, Harbin Normal University, Harbin 150025, China; (W.Z.); (X.X.); (R.Z.); (Y.T.); (X.M.); (X.W.); (Y.J.)
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3
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Schimmer S, Mittermüller D, Werner T, Görs PE, Meckelmann SW, Finlay DK, Dittmer U, Littwitz-Salomon E. Fatty acids are crucial to fuel NK cells upon acute retrovirus infection. Front Immunol 2023; 14:1296355. [PMID: 38094304 PMCID: PMC10716207 DOI: 10.3389/fimmu.2023.1296355] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 11/14/2023] [Indexed: 12/18/2023] Open
Abstract
Natural killer (NK) cells are cytotoxic innate immune cells, able to recognize and eliminate virus-infected as well as cancer cells. Metabolic reprogramming is crucial for their activity as they have enhanced energy and nutritional demands for their functions during an infection. Fatty acids (FAs) represent an important source of cellular energy and are essential for proliferation of immune cells. However, the precise role of FAs for NK cells activity in retrovirus infection was unknown. Here we show that activated NK cells increase the expression of the FA uptake receptor CD36 and subsequently the uptake of FAs upon acute virus infection. We found an enhanced flexibility of NK cells to utilize FAs as source of energy compare to naïve NK cells. NK cells that were able to generate energy from FAs showed an augmented target cell killing and increased expression of cytotoxic parameters. However, NK cells that were unable to generate energy from FAs exhibited a severely decreased migratory capacity. Our results demonstrate that NK cells require FAs in order to fight acute virus infection. Susceptibility to severe virus infections as it is shown for people with malnutrition may be augmented by defects in the FA processing machinery, which might be a target to therapeutically boost NK cell functions in the future.
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Affiliation(s)
- Simone Schimmer
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Daniela Mittermüller
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- Institute for Experimental Immunology and Imaging, University Hospital Essen, University of Duisburg Essen, Essen, Germany
| | - Tanja Werner
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Paul E. Görs
- Applied Analytical Chemistry, University of Duisburg‐Essen, Essen, Germany
| | - Sven W. Meckelmann
- Applied Analytical Chemistry, University of Duisburg‐Essen, Essen, Germany
| | - David K. Finlay
- School of Biochemistry and Immunology, School of Pharmacy and Pharmaceutical Sciences, Trinity Biomedical Sciences Institute, Trinity College Dublin, Dublin, Ireland
| | - Ulf Dittmer
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Elisabeth Littwitz-Salomon
- Institute for Virology, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
- Institute for Translational HIV Research, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
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4
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Duong LK, Corbali HI, Riad TS, Ganjoo S, Nanez S, Voss T, Barsoumian HB, Welsh J, Cortez MA. Lipid metabolism in tumor immunology and immunotherapy. Front Oncol 2023; 13:1187279. [PMID: 37205182 PMCID: PMC10185832 DOI: 10.3389/fonc.2023.1187279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 04/24/2023] [Indexed: 05/21/2023] Open
Abstract
Lipids are a diverse class of biomolecules that have been implicated in cancer pathophysiology and in an array of immune responses, making them potential targets for improving immune responsiveness. Lipid and lipid oxidation also can affect tumor progression and response to treatment. Although their importance in cellular functions and their potential as cancer biomarkers have been explored, lipids have yet to be extensively investigated as a possible form of cancer therapy. This review explores the role of lipids in cancer pathophysiology and describes how further understanding of these macromolecules could prompt novel treatments for cancer.
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Affiliation(s)
- Lisa K. Duong
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Halil Ibrahim Corbali
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
- Department of Medical Pharmacology, Cerrahpasa Medical Faculty, Istanbul University-Cerrahpasa, Istanbul, Türkiye
| | - Thomas S. Riad
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Shonik Ganjoo
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Selene Nanez
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Tiffany Voss
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Hampartsoum B. Barsoumian
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - James Welsh
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
| | - Maria Angelica Cortez
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, TX, United States
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5
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Aria H, Ghaedrahmati F, Ganjalikhani-Hakemi M. Cutting edge: Metabolic immune reprogramming, reactive oxygen species, and cancer. J Cell Physiol 2021; 236:6168-6189. [PMID: 33561318 DOI: 10.1002/jcp.30303] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 01/09/2021] [Accepted: 01/19/2021] [Indexed: 02/05/2023]
Abstract
A recently proposed term "immunometabolism" points to the functional intracellular metabolic changes that occur within different immune cells. Recent findings suggest that immune responses can be determined by the metabolic status of immune cells and metabolic reprogramming is an important feature of immune cell activation. Metabolic reprogramming is also well known for cancer cells and has been suggested as a major sign of cancer progression. Metabolic reprogramming of immune cells is also seen in the tumor microenvironment. In the past decade, immunometabolism has progressively become an extraordinarily vibrant and productive area of study in immunology because of its importance for immunotherapy. Understanding the immunometabolic situation of T cells and other immune cells along with the metabolic behavior of cancer cells can help us design new therapeutic approaches against cancers. Here, we have the aim to review the cutting-edge findings on the immunometabolic situation in immune and tumor cells. We discuss new findings on signaling pathways during metabolic reprogramming, its regulation, and the participation of reactive oxygen species in these processes.
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Affiliation(s)
- Hamid Aria
- Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Farhoodeh Ghaedrahmati
- Department of Immunology, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran
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Huang C, Shao J, Lou C, Wu F, Ge T, Gao H, Zheng X, Dong X, Xu L, Chen Z. Reduced Energy Metabolism Impairs T Cell-Dependent B Cell Responses in Patients With Advanced HBV-Related Cirrhosis. Front Immunol 2021; 12:660312. [PMID: 34248941 PMCID: PMC8261287 DOI: 10.3389/fimmu.2021.660312] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Accepted: 05/31/2021] [Indexed: 12/16/2022] Open
Abstract
Background and Aims Patients with decompensated HBV-related liver cirrhosis (HBV D-LC) showed compromised immune responses, which manifested as a proneness to develop infections and hyporesponsiveness to vaccines, resulting in accelerated disease progression. The alterations in T cell-dependent B cell responses in this pathophysiological process were not well understood. This study aimed to investigate T cell-dependent B cell responses in this process and discuss the mechanism from the perspective of metabolism. Methods Changes in phenotypes and subsets of peripheral B cells between HBV D-LC patients and healthy controls (HCs) were compared by flow cytometry. Isolated B cells were activated by coculture with circulating T follicular (cTfh) cells. After coculture, the frequencies of plasmablasts and plasma cells and immunoglobin levels were analyzed. Oxidative phosphorylation (OXPHOS) and glycolysis were analyzed by a Seahorse analyzer. Mitochondrial function and the AKT/mTOR pathway were analyzed by flow cytometry. Results The proliferation and differentiation capacities of B cells after T cell stimulation were impaired in D-LC. Furthermore, we found that B cells from D-LC patients showed reductions in OXPHOS and glycolysis after activation, which may result from reduced glucose uptake, mitochondrial dysfunction and attenuated activation of the AKT/mTOR pathway. Conclusions B cells from HBV D-LC patients showed dysfunctional energy metabolism after T cell-dependent activation. Understanding the regulations of B cell metabolic pathway and their changes may provide a new direction to rescue B cell hyporesponsiveness in patients with HBV D-LC, preventing these patients be infected and improving sensitivity to vaccines.
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Affiliation(s)
- Chunhong Huang
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Junwei Shao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Congcong Lou
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Fengtian Wu
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Tiantian Ge
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hainv Gao
- Department of Infectious Diseases, Shulan (Hangzhou) Hospital Affiliated to Zhejiang Shuren University Shulan International Medical College, Hangzhou, China
| | - Xiaoping Zheng
- Department of Pathology, Shulan (Hangzhou) Hospital Affiliated to Zhejiang Shuren University Shulan International Medical College, Hangzhou, China
| | - Xuejun Dong
- Department of Clinical Laboratory Center, Shaoxing People's Hospital (Shaoxing Hospital, Zhejiang University School of Medicine), Shaoxing, China
| | - Lichen Xu
- Department of Nephrology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhi Chen
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, National Clinical Research Center for Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Disease, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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7
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Ripperger TJ, Bhattacharya D. Transcriptional and Metabolic Control of Memory B Cells and Plasma Cells. Annu Rev Immunol 2021; 39:345-368. [PMID: 33556247 DOI: 10.1146/annurev-immunol-093019-125603] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
For many infections and almost all vaccines, neutralizing-antibody-mediated immunity is the primary basis and best functional correlate of immunological protection. Durable long-term humoral immunity is mediated by antibodies secreted by plasma cells that preexist subsequent exposures and by memory B cells that rapidly respond to infections once they have occurred. In the midst of the current pandemic of coronavirus disease 2019, it is important to define our current understanding of the unique roles of memory B cells and plasma cells in immunity and the factors that control the formation and persistence of these cell types. This fundamental knowledge is the basis to interpret findings from natural infections and vaccines. Here, we review transcriptional and metabolic programs that promote and support B cell fates and functions, suggesting points at which these pathways do and do not intersect.
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Affiliation(s)
- Tyler J Ripperger
- Department of Immunobiology, University of Arizona College of Medicine-Tucson, Tucson, Arizona 85724, USA; ,
| | - Deepta Bhattacharya
- Department of Immunobiology, University of Arizona College of Medicine-Tucson, Tucson, Arizona 85724, USA; ,
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Burdick Sanchez NC, Broadway PR, Carroll JA. Influence of Yeast Products on Modulating Metabolism and Immunity in Cattle and Swine. Animals (Basel) 2021; 11:ani11020371. [PMID: 33540746 PMCID: PMC7913008 DOI: 10.3390/ani11020371] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 01/19/2021] [Accepted: 01/27/2021] [Indexed: 12/21/2022] Open
Abstract
Nutritional supplementation has been used by livestock producers for many years in order to increase animal performance, improve animal health, and reduce negative effects associated with enteric and/or respiratory pathogens. Supplements such as yeast and yeast-based products have broad applications across many livestock production systems, including poultry, aquaculture, cattle, and swine and have been shown to benefit animal production at various stages. These benefits include improvement in milk production, weight gain and feed conversion, as well as immune function. Initial research into the mode of action for these effects has focused on stimulation of the immune system by the β-glucan fractions of yeast. However, emerging studies have revealed that some of the beneficial effects of yeast products may stem from altering metabolism, including the availability of glucose and fatty acids. These changes in metabolism, and potentially energy availability, may partially explain differences in immune function observed in yeast-supplemented livestock, as the energy demands of an activated immune system are extremely high. Thus, this paper explores the influence of yeast products on metabolism in cattle and swine, and how changes in metabolism and energy availability may contribute to improvements in immune function in supplemented animals.
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Eleftheriadis T, Pissas G, Mavropoulos A, Nikolaou E, Filippidis G, Liakopoulos V, Stefanidis I. In Mixed Lymphocyte Reaction, the Hypoxia-Inducible Factor Prolyl-Hydroxylase Inhibitor Roxadustat Suppresses Cellular and Humoral Alloimmunity. Arch Immunol Ther Exp (Warsz) 2020; 68:31. [PMID: 33011826 DOI: 10.1007/s00005-020-00596-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Accepted: 09/18/2020] [Indexed: 12/13/2022]
Abstract
Hypoxia-inducible factor (HIF) prolyl-hydroxylase inhibitors are currently used for the treatment of renal anemia. Since HIF affects immune cells, we evaluated the effect of such a drug, the roxadustat, on adaptive immunity. Cell proliferation was assessed in a two-way mixed lymphocyte reaction (MLR) with BrdU assay. In CD4+ T cells isolated from the two-way MLRs, western blotting was performed to detect the impact of roxadustat on HIF-1α and HIF-2α, the apoptotic marker cleaved caspase-3, and the master transcription factors of CD4+ T cells differentiation towards Th1, Th2, Th17, Treg and Tfh subsets. The signature cytokines of the above CD4+ T-cell subsets IFN-γ, IL-4, IL-17, IL-10, and IL-21 were measured in the supernatants. For assessing humoral immunity, we developed a suitable antibody-mediated complement-dependent cytotoxicity assay. Roxadustat stabilized HIF-1α and HIF-2α, suppressed cell proliferation, inhibited CD4+ T-cell differentiation into Th1 and Th17 subsets, while it favored differentiation towards Th2, Treg and Tfh. Roxadustat suppressed humoral immunity too. These immunosuppressive properties of roxadustat indicate that the recently introduced HIF prolyl-hydroxylase inhibitors in medical therapeutics may render the patients vulnerable to infections. This possibility should be further evaluated in clinical trials.
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Affiliation(s)
- Theodoros Eleftheriadis
- Department of Nephrology, Faculty of Medicine, University of Thessaly, Biopolis, Mezourlo Hill, 41110, Larissa, Greece.
| | - Georgios Pissas
- Department of Nephrology, Faculty of Medicine, University of Thessaly, Biopolis, Mezourlo Hill, 41110, Larissa, Greece
| | - Athanasios Mavropoulos
- Department of Nephrology, Faculty of Medicine, University of Thessaly, Biopolis, Mezourlo Hill, 41110, Larissa, Greece
| | - Evdokia Nikolaou
- Department of Nephrology, Faculty of Medicine, University of Thessaly, Biopolis, Mezourlo Hill, 41110, Larissa, Greece
| | - Georgios Filippidis
- Department of Nephrology, Faculty of Medicine, University of Thessaly, Biopolis, Mezourlo Hill, 41110, Larissa, Greece
| | - Vassilios Liakopoulos
- Department of Nephrology, Faculty of Medicine, University of Thessaly, Biopolis, Mezourlo Hill, 41110, Larissa, Greece
| | - Ioannis Stefanidis
- Department of Nephrology, Faculty of Medicine, University of Thessaly, Biopolis, Mezourlo Hill, 41110, Larissa, Greece
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Raybuck AL, Lee K, Cho SH, Li J, Thomas JW, Boothby MR. mTORC1 as a cell-intrinsic rheostat that shapes development, preimmune repertoire, and function of B lymphocytes. FASEB J 2019; 33:13202-13215. [PMID: 31533002 PMCID: PMC6894075 DOI: 10.1096/fj.201900069r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2019] [Accepted: 08/19/2019] [Indexed: 11/11/2022]
Abstract
Ample evidence indicates that nutrient concentrations in extracellular milieux affect signaling mediated by environmental sensor proteins. For instance, the mechanistic target of rapamycin (mTOR) is reduced during protein malnutrition and is known to be modulated by concentrations of several amino acids when in a multiprotein signaling complex that contains regulatory-associated protein of mTOR. We hypothesized that a partial decrease in mTOR complex 1 (mTORC1) activity intrinsic to B-lineage cells would perturb lymphocyte development or function, or both. We show that a cell-intrinsic decrease in mTORC1 activity impacted developmental progression, antigen receptor repertoire, and function along the B lineage. Thus, preimmune repertoires of B-lineage cells were altered in the marrow and periphery in a genetic model of regulatory-associated protein of mTOR haplo-insufficiency. An additional role for mTORC1 was revealed when a B-cell antigen receptor transgene was found to circumvent the abnormal B-cell development: haploinsufficient B cells were profoundly impaired in responses to antigen in vivo. Collectively, our findings indicate that mTORC1 serves as a rheostat that shapes differentiation along the B lineage, the preimmune repertoire, and antigen-driven selection of mature B cells. The findings also reveal a range in the impact of this nutrient sensor on activity-response relationships for distinct endpoints.-Raybuck, A. L., Lee, K., Cho, S. H., Li, J., Thomas, J. W., Boothby, M. R. mTORC1 as a cell-intrinsic rheostat that shapes development, preimmune repertoire, and function of B lymphocytes.
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Affiliation(s)
- Ariel L. Raybuck
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Keunwook Lee
- Department of Biomedical Science, Hallym University, Chuncheon, Gangwon-do, South Korea
| | - Sung Hoon Cho
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation (VI4), Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Jingxin Li
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - James W. Thomas
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Mark R. Boothby
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Vanderbilt Institute for Infection, Immunology, and Inflammation (VI4), Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA
- Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
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11
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Saha A, Taylor PA, Lees CJ, Panoskaltsis-Mortari A, Osborn MJ, Feser CJ, Thangavelu G, Melchinger W, Refaeli Y, Hill GR, Munn DH, Murphy WJ, Serody JS, Maillard I, Kreymborg K, van den Brink M, Dong C, Huang S, Zang X, Allison JP, Zeiser R, Blazar BR. Donor and host B7-H4 expression negatively regulates acute graft-versus-host disease lethality. JCI Insight 2019; 4:127716. [PMID: 31578305 DOI: 10.1172/jci.insight.127716] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Accepted: 08/23/2019] [Indexed: 12/30/2022] Open
Abstract
B7-H4 is a negative regulatory B7 family member. We investigated the role of host and donor B7-H4 in regulating acute graft-versus-host disease (GVHD). Allogeneic donor T cells infused into B7-H4-/- versus WT recipients markedly accelerated GVHD-induced lethality. Chimera studies pointed toward B7-H4 expression on host hematopoietic cells as more critical than parenchymal cells in controlling GVHD. Rapid mortality in B7-H4-/- recipients was associated with increased donor T cell expansion, gut T cell homing and loss of intestinal epithelial integrity, increased T effector function (proliferation, proinflammatory cytokines, cytolytic molecules), and reduced apoptosis. Higher metabolic demands of rapidly proliferating donor T cells in B7-H4-/- versus WT recipients required multiple metabolic pathways, increased extracellular acidification rates (ECARs) and oxygen consumption rates (OCRs), and increased expression of fuel substrate transporters. During GVHD, B7-H4 expression was upregulated on allogeneic WT donor T cells. B7-H4-/- donor T cells given to WT recipients increased GVHD mortality and had function and biological properties similar to WT T cells from allogeneic B7-H4-/- recipients. Graft-versus-leukemia responses were intact regardless as to whether B7-H4-/- mice were used as hosts or donors. Taken together, these data provide new insights into the negative regulatory processes that control GVHD and provide support for developing therapeutic strategies directed toward the B7-H4 pathway.
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Affiliation(s)
- Asim Saha
- Masonic Cancer Center and Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, Minnesota, USA
| | - Patricia A Taylor
- Masonic Cancer Center and Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, Minnesota, USA
| | - Christopher J Lees
- Masonic Cancer Center and Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, Minnesota, USA
| | - Angela Panoskaltsis-Mortari
- Masonic Cancer Center and Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, Minnesota, USA
| | - Mark J Osborn
- Masonic Cancer Center and Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, Minnesota, USA
| | - Colby J Feser
- Masonic Cancer Center and Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, Minnesota, USA
| | - Govindarajan Thangavelu
- Masonic Cancer Center and Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, Minnesota, USA
| | - Wolfgang Melchinger
- Department of Hematology, Oncology, and Stem-Cell Transplantation, Freiburg University Medical Center, Albert Ludwigs University Freiburg, Freiburg, Germany
| | - Yosef Refaeli
- Department of Dermatology, University of Colorado, Aurora, Colorado, USA
| | - Geoffrey R Hill
- Fred Hutchinson Cancer Research Center, University of Washington, Seattle, Washington, USA
| | - David H Munn
- Department of Pediatrics, Georgia Health Sciences University, Augusta, Georgia, USA
| | - William J Murphy
- Department of Dermatology, UC Davis School of Medicine, Sacramento, California, USA
| | - Jonathan S Serody
- Department of Medicine, University of North Carolina, Chapel Hill, North Carolina, USA
| | - Ivan Maillard
- Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan, USA
| | - Katharina Kreymborg
- Department of Immunology and Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Marcel van den Brink
- Department of Immunology and Medicine, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Chen Dong
- Institute for Immunology and School of Medicine, Tsinghua University, Beijing, China
| | - Shuyu Huang
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, USA
| | - Xingxing Zang
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, New York, USA
| | - James P Allison
- Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Robert Zeiser
- Department of Hematology, Oncology, and Stem-Cell Transplantation, Freiburg University Medical Center, Albert Ludwigs University Freiburg, Freiburg, Germany
| | - Bruce R Blazar
- Masonic Cancer Center and Department of Pediatrics, Division of Blood and Marrow Transplantation, University of Minnesota, Minneapolis, Minnesota, USA
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12
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mTOR and Aging: An Old Fashioned Dress. Int J Mol Sci 2019; 20:ijms20112774. [PMID: 31174250 PMCID: PMC6600378 DOI: 10.3390/ijms20112774] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 06/03/2019] [Accepted: 06/04/2019] [Indexed: 12/12/2022] Open
Abstract
Aging is a physiologic/pathologic process characterized by a progressive impairment of cellular functions, supported by the alterations of several molecular pathways, leading to an increased cell susceptibility to injury. This deterioration is the primary risk factor for several major human pathologies. Numerous cellular processes, including genomic instability, telomere erosion, epigenetic alterations, loss of proteostasis, deregulated nutrient-sensing, mitochondrial dysfunction, stem cell exhaustion, and altered intercellular signal transduction represent common denominators of aging in different organisms. Mammalian target of rapamycin (mTOR) is an evolutionarily conserved nutrient sensing protein kinase that regulates growth and metabolism in all eukaryotic cells. Studies in flies, worms, yeast, and mice support the hypothesis that the mTOR signalling network plays a pivotal role in modulating aging. mTOR is emerging as the most robust mediator of the protective effects of various forms of dietary restriction, which has been shown to extend lifespan and slow the onset of age-related diseases across species. Herein we discuss the role of mTor signalling network in the development of classic age-related diseases, focused on cardiovascular system, immune response, and cancer.
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13
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Akkaya B, Roesler AS, Miozzo P, Theall BP, Al Souz J, Smelkinson MG, Kabat J, Traba J, Sack MN, Brzostowski JA, Pena M, Dorward DW, Pierce SK, Akkaya M. Increased Mitochondrial Biogenesis and Reactive Oxygen Species Production Accompany Prolonged CD4 + T Cell Activation. THE JOURNAL OF IMMUNOLOGY 2018; 201:3294-3306. [PMID: 30373851 DOI: 10.4049/jimmunol.1800753] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Accepted: 09/25/2018] [Indexed: 01/13/2023]
Abstract
Activation of CD4+ T cells to proliferate drives cells toward aerobic glycolysis for energy production while using mitochondria primarily for macromolecular synthesis. In addition, the mitochondria of activated T cells increase production of reactive oxygen species, providing an important second messenger for intracellular signaling pathways. To better understand the critical changes in mitochondria that accompany prolonged T cell activation, we carried out an extensive analysis of mitochondrial remodeling using a combination of conventional strategies and a novel high-resolution imaging method. We show that for 4 d following activation, mouse CD4+ T cells sustained their commitment to glycolysis facilitated by increased glucose uptake through increased expression of GLUT transporters. Despite their limited contribution to energy production, mitochondria were active and showed increased reactive oxygen species production. Moreover, prolonged activation of CD4+ T cells led to increases in mitochondrial content and volume, in the number of mitochondria per cell and in mitochondrial biogenesis. Thus, during prolonged activation, CD4+ T cells continue to obtain energy predominantly from glycolysis but also undergo extensive mitochondrial remodeling, resulting in increased mitochondrial activity.
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Affiliation(s)
- Billur Akkaya
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Alexander S Roesler
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852
| | - Pietro Miozzo
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852
| | - Brandon P Theall
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852
| | - Jafar Al Souz
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Margery G Smelkinson
- Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Juraj Kabat
- Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Javier Traba
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892; and
| | - Michael N Sack
- Cardiovascular Branch, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892; and
| | - Joseph A Brzostowski
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852
| | - Mirna Pena
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852
| | - David W Dorward
- Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT 59840
| | - Susan K Pierce
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852
| | - Munir Akkaya
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20852;
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14
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From zero to sixty and back to zero again: the metabolic life of B cells. Curr Opin Immunol 2018; 57:1-7. [PMID: 30312894 DOI: 10.1016/j.coi.2018.09.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 09/26/2018] [Accepted: 09/26/2018] [Indexed: 12/17/2022]
Abstract
Throughout their lifetimes B cells shift metabolic gears to move rapidly from quiescent states to full out proliferative expansion and back again. Here we discuss recent findings that shed light on how B cells rapidly shift gears to metabolically fuel expansion and then just as rapidly down shift during phases of receptor rearrangements to ensure genome stability. We also discuss the link between metabolic activity and fate decisions in B cells.
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15
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Sack MN. Mitochondrial fidelity and metabolic agility control immune cell fate and function. J Clin Invest 2018; 128:3651-3661. [PMID: 30059015 DOI: 10.1172/jci120845] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Remodeling of mitochondrial metabolism plays an important role in regulating immune cell fate, proliferation, and activity. Furthermore, given their bacterial ancestry, disruption in mitochondrial fidelity leading to extravasation of their content initiates and amplifies innate immune surveillance with a myriad of physiologic and pathologic consequences. Investigations into the role of mitochondria in the immune system have come to the fore, and appreciation of mitochondrial function and quality control in immune regulation has enhanced our understanding of disease pathogenesis and identified new targets for immune modulation. This mitochondria-centered Review focuses on the role of mitochondrial metabolism and fidelity, as well as the role of the mitochondria as a structural platform, for the control of immune cell polarity, activation, and signaling. Mitochondria-linked disease and mitochondrially targeted therapeutic strategies to manage these conditions are also discussed.
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16
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Akkaya M, Traba J, Roesler AS, Miozzo P, Akkaya B, Theall BP, Sohn H, Pena M, Smelkinson M, Kabat J, Dahlstrom E, Dorward DW, Skinner J, Sack MN, Pierce SK. Second signals rescue B cells from activation-induced mitochondrial dysfunction and death. Nat Immunol 2018; 19:871-884. [PMID: 29988090 PMCID: PMC6202187 DOI: 10.1038/s41590-018-0156-5] [Citation(s) in RCA: 156] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2018] [Accepted: 05/11/2018] [Indexed: 12/31/2022]
Abstract
B cells are activated by two temporally distinct signals, the first provided by antigen binding to the B cell antigen receptor (BCR) and the second by T helper cells. Here we show that B cells responded to antigen by rapidly increasing metabolic activity including both oxidative phosphorylation and glycolysis. In the absence of a second signal B cells progressively lost mitochondrial function and glycolytic capacity leading to apoptosis. Mitochondrial dysfunction was a result of the gradual accumulation of intracellular calcium through calcium response activated calcium channels that was preventable for approximately nine hours after B cell antigen binding by either T helper cells or Toll-like receptor 9 signaling. Thus, BCR signaling appears to activate a metabolic program that imposes a limited time window in which B cells either receive a second signal and survive or are eliminated.
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Affiliation(s)
- Munir Akkaya
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA.
| | - Javier Traba
- Laboratory of Mitochondrial Biology and Metabolism, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Alexander S Roesler
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA.,Duke University School of Medicine, Durham, NC, USA
| | - Pietro Miozzo
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA.,University of Massachusetts Medical School, Worcester, MA, USA
| | - Billur Akkaya
- Laboratory of Immunology, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Brandon P Theall
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Haewon Sohn
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Mirna Pena
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Margery Smelkinson
- Biological Imaging Section, Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Juraj Kabat
- Biological Imaging Section, Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA
| | - Eric Dahlstrom
- Genomics Unit, Rocky Mountain Laboratories, Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - David W Dorward
- Microscopy Unit, Rocky Mountain Laboratories, Research Technologies Branch, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Hamilton, MT, USA
| | - Jeff Skinner
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA
| | - Michael N Sack
- Laboratory of Mitochondrial Biology and Metabolism, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD, USA
| | - Susan K Pierce
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD, USA.
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17
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Karonitsch T, Kandasamy RK, Kartnig F, Herdy B, Dalwigk K, Niederreiter B, Holinka J, Sevelda F, Windhager R, Bilban M, Weichhart T, Säemann M, Pap T, Steiner G, Smolen JS, Kiener HP, Superti-Furga G. mTOR Senses Environmental Cues to Shape the Fibroblast-like Synoviocyte Response to Inflammation. Cell Rep 2018; 23:2157-2167. [PMID: 29768212 PMCID: PMC5972226 DOI: 10.1016/j.celrep.2018.04.044] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 02/02/2018] [Accepted: 04/11/2018] [Indexed: 12/25/2022] Open
Abstract
Accumulating evidence suggests that metabolic master regulators, including mTOR, regulate adaptive and innate immune responses. Resident mesenchymal tissue components are increasingly recognized as key effector cells in inflammation. Whether mTOR also controls the inflammatory response in fibroblasts is insufficiently studied. Here, we show that TNF signaling co-opts the mTOR pathway to shift synovial fibroblast (FLS) inflammation toward an IFN response. mTOR pathway activation is associated with decreased NF-κB-mediated gene expression (e.g., PTGS2, IL-6, and IL-8) but increased STAT1-dependent gene expression (e.g., CXCL11 and TNFSF13B). We further demonstrate how metabolic inputs, such as amino acids, impinge on TNF-mTORC1 signaling to differentially regulate pro-inflammatory signaling circuits. Our results define a critical role for mTOR in the regulation of the pro-inflammatory response in FLSs and unfold its pathogenic involvement in TNF-driven diseases, such as rheumatoid arthritis (RA).
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Affiliation(s)
- Thomas Karonitsch
- Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, 1090 Vienna, Austria; CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria.
| | - Richard K Kandasamy
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria
| | - Felix Kartnig
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria
| | - Barbara Herdy
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria
| | - Karolina Dalwigk
- Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, 1090 Vienna, Austria
| | - Birgit Niederreiter
- Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, 1090 Vienna, Austria
| | - Johannes Holinka
- Department of Orthopaedics, Medical University of Vienna, 1090 Vienna, Austria
| | - Florian Sevelda
- Department of Orthopaedics, Medical University of Vienna, 1090 Vienna, Austria
| | - Reinhard Windhager
- Department of Orthopaedics, Medical University of Vienna, 1090 Vienna, Austria
| | - Martin Bilban
- Department of Laboratory Medicine, Medical University of Vienna, 1090 Vienna, Austria
| | - Thomas Weichhart
- Center of Pathobiochemistry and Genetics, Institute of Medical Genetics, Medical University of Vienna, 1090 Vienna, Austria
| | - Marcus Säemann
- Department of Medicine VI, Wilhelminenspital, 1160 Vienna, Austria; Sigmund Freud Private University, Medical School, 1020 Vienna, Austria
| | - Thomas Pap
- Institute of Musculoskeletal Medicine, University Hospital Muenster, 48149 Muenster, Germany
| | - Günter Steiner
- Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, 1090 Vienna, Austria
| | - Josef S Smolen
- Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, 1090 Vienna, Austria
| | - Hans P Kiener
- Division of Rheumatology, Department of Medicine 3, Medical University of Vienna, 1090 Vienna, Austria
| | - Giulio Superti-Furga
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, 1090 Vienna, Austria; Center for Physiology and Pharmacology, Medical University of Vienna, 1090 Vienna, Austria.
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18
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Eleftheriadis T, Pissas G, Liakopoulos V, Stefanidis I. IDO decreases glycolysis and glutaminolysis by activating GCN2K, while it increases fatty acid oxidation by activating AhR, thus preserving CD4+ T‑cell survival and proliferation. Int J Mol Med 2018; 42:557-568. [PMID: 29693118 DOI: 10.3892/ijmm.2018.3624] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 03/15/2018] [Indexed: 11/05/2022] Open
Abstract
It is generally hypothesized in the literature that indoleamine 2,3‑dioxygenase (IDO), by degrading L‑tryptophan along the kynurenine pathway, suppresses CD4+ T‑cell function by inducing apoptosis, inhibiting proliferation and promoting differentiation towards a regulatory phenotype. These effects are either accompanied or directly lead to alterations in cell metabolism. The present study evaluated the pathways that govern the effect of IDO on the utilization of the three main energy sources in CD4+ T‑cells. Two‑way mixed lymphocyte reactions were performed with or without oleate and/or the IDO inhibitor 1‑methyl‑DL‑tryptophan. In addition, isolated CD4+ T‑cells cultured in an oleate‑containing medium were activated in the presence or not of the general control nonderepressible 2 kinase (GCN2K) activator tryptophanol. L‑tryptophan, glucose and free fatty acid consumption, cell proliferation, apoptosis and the levels of key proteins involved in IDO‑mediated signal transduction, and glucose, glutamine and free fatty acid utilization were assessed. The results indicate that IDO decreased glycolysis and glutaminolysis by activating GCN2K, resulting in activation of AMP‑activated protein kinase (AMPK). In parallel with AMPK activation, IDO‑induced activation of aryl hydrocarbon receptor increased the expression of all carnitine palmitoyltransferase I isoenzymes, leading ultimately to increased free fatty acid oxidation and preservation of CD4+ T‑cell survival and proliferation. Thus, contrary to what is generally hypothesized, in a normal environment containing fatty acids, the immunosuppressive effect of IDO may not be due to a decrease in CD4+ T‑cell survival and proliferation, since IDO supplies the required energy for cell survival and proliferation by increasing free fatty acid oxidation.
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Affiliation(s)
- Theodoros Eleftheriadis
- Department of Nephrology, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Georgios Pissas
- Department of Nephrology, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Vassilios Liakopoulos
- Department of Nephrology, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Ioannis Stefanidis
- Department of Nephrology, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
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19
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Chatterjee S, Daenthanasanmak A, Chakraborty P, Wyatt MW, Dhar P, Selvam SP, Fu J, Zhang J, Nguyen H, Kang I, Toth K, Al-Homrani M, Husain M, Beeson G, Ball L, Helke K, Husain S, Garrett-Mayer E, Hardiman G, Mehrotra M, Nishimura MI, Beeson CC, Bupp MG, Wu J, Ogretmen B, Paulos CM, Rathmell J, Yu XZ, Mehrotra S. CD38-NAD +Axis Regulates Immunotherapeutic Anti-Tumor T Cell Response. Cell Metab 2018; 27:85-100.e8. [PMID: 29129787 PMCID: PMC5837048 DOI: 10.1016/j.cmet.2017.10.006] [Citation(s) in RCA: 176] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 05/02/2017] [Accepted: 10/13/2017] [Indexed: 10/18/2022]
Abstract
Heightened effector function and prolonged persistence, the key attributes of Th1 and Th17 cells, respectively, are key features of potent anti-tumor T cells. Here, we established ex vivo culture conditions to generate hybrid Th1/17 cells, which persisted long-term in vivo while maintaining their effector function. Using transcriptomics and metabolic profiling approaches, we showed that the enhanced anti-tumor property of Th1/17 cells was dependent on the increased NAD+-dependent activity of the histone deacetylase Sirt1. Pharmacological or genetic inhibition of Sirt1 activity impaired the anti-tumor potential of Th1/17 cells. Importantly, T cells with reduced surface expression of the NADase CD38 exhibited intrinsically higher NAD+, enhanced oxidative phosphorylation, higher glutaminolysis, and altered mitochondrial dynamics that vastly improved tumor control. Lastly, blocking CD38 expression improved tumor control even when using Th0 anti-tumor T cells. Thus, strategies targeting the CD38-NAD+ axis could increase the efficacy of anti-tumor adoptive T cell therapy.
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Affiliation(s)
- Shilpak Chatterjee
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Anusara Daenthanasanmak
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Paramita Chakraborty
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Megan W Wyatt
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Payal Dhar
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Shanmugam Panneer Selvam
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Jianing Fu
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Jinyu Zhang
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Hung Nguyen
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Inhong Kang
- Department of Pathology and Laboratory Medicine, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Kyle Toth
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Mazen Al-Homrani
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Mahvash Husain
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Gyda Beeson
- Department of Pharmaceutical and Biomedical Sciences, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Lauren Ball
- Department of Pharmaceutical and Biomedical Sciences, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Kristi Helke
- Department of Pathology and Laboratory Medicine, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Shahid Husain
- Department of Ophthalmology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Elizabeth Garrett-Mayer
- Department of Public Health, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Gary Hardiman
- Department of Nephrology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Meenal Mehrotra
- Department of Pathology and Laboratory Medicine, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | | | - Craig C Beeson
- Department of Pharmaceutical and Biomedical Sciences, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | | | - Jennifer Wu
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Besim Ogretmen
- Department of Biochemistry and Molecular Biology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Chrystal M Paulos
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Jeffery Rathmell
- Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, TN 37232, USA
| | - Xue-Zhong Yu
- Department of Microbiology and Immunology, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA
| | - Shikhar Mehrotra
- Department of Surgery, Hollings Cancer Center, Medical University of South Carolina, Charleston, SC 29425, USA.
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20
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Cox NJ, Luo PM, Smith TJ, Bisnett BJ, Soderblom EJ, Boyce M. A Novel Glycoproteomics Workflow Reveals Dynamic O-GlcNAcylation of COPγ1 as a Candidate Regulator of Protein Trafficking. Front Endocrinol (Lausanne) 2018; 9:606. [PMID: 30459710 PMCID: PMC6232944 DOI: 10.3389/fendo.2018.00606] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 09/24/2018] [Indexed: 02/04/2023] Open
Abstract
O-linked β-N-acetylglucosamine (O-GlcNAc) is an abundant and essential intracellular form of protein glycosylation in animals and plants. In humans, dysregulation of O-GlcNAcylation occurs in a wide range of diseases, including cancer, diabetes, and neurodegeneration. Since its discovery more than 30 years ago, great strides have been made in understanding central aspects of O-GlcNAc signaling, including identifying thousands of its substrates and characterizing the enzymes that govern it. However, while many O-GlcNAcylated proteins have been reported, only a small subset of these change their glycosylation status in response to a typical stimulus or stress. Identifying the functionally important O-GlcNAcylation changes in any given signaling context remains a significant challenge in the field. To address this need, we leveraged chemical biology and quantitative mass spectrometry methods to create a new glycoproteomics workflow for profiling stimulus-dependent changes in O-GlcNAcylated proteins. In proof-of-principle experiments, we used this new workflow to interrogate changes in O-GlcNAc substrates in mammalian protein trafficking pathways. Interestingly, our results revealed dynamic O-GlcNAcylation of COPγ1, an essential component of the coat protein I (COPI) complex that mediates Golgi protein trafficking. Moreover, we detected 11 O-GlcNAc moieties on COPγ1 and found that this modification is reduced by a model secretory stress that halts COPI trafficking. Our results suggest that O-GlcNAcylation may regulate the mammalian COPI system, analogous to its previously reported roles in other protein trafficking pathways. More broadly, our glycoproteomics workflow is applicable to myriad systems and stimuli, empowering future studies of O-GlcNAc in a host of biological contexts.
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Affiliation(s)
- Nathan J. Cox
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
| | - Peter M. Luo
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
| | - Timothy J. Smith
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
| | - Brittany J. Bisnett
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
| | - Erik J. Soderblom
- Proteomics and Metabolomics Core Facility, Center for Genomic and Computational Biology, Duke University, Durham, NC, United States
| | - Michael Boyce
- Department of Biochemistry, Duke University School of Medicine, Durham, NC, United States
- *Correspondence: Michael Boyce
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21
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Eleftheriadis T, Pissas G, Mavropoulos A, Liakopoulos V, Stefanidis I. Comparison of the effect of the aerobic glycolysis inhibitor dichloroacetate and of the Krebs cycle inhibitor LW6 on cellular and humoral alloimmunity. Biomed Rep 2017; 7:439-444. [PMID: 29181155 DOI: 10.3892/br.2017.980] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 09/06/2017] [Indexed: 02/06/2023] Open
Abstract
Cell metabolism is altered during T-cell and B-cell activation and differentiation. Clarifying the exact metabolic shifts may lead to the development of new immunosuppressive medications. In this study, the effect of the aerobic glycolysis inhibitor dichloroacetate (DCA) and of the Krebs cycle enzyme malate dehydrogenase 2 (MDH2) inhibitor LW6 on T-cell alloimmune clonal expansion and on alloantibody production, was evaluated. T-cell clonal expansion was assessed in two-way mixed lymphocyte reaction (MLR). Humoral alloimmunity was evaluated by the alloantibody production in one-way MLR. For this purpose, an antibody-mediated complement-dependent cytotoxicity assay was developed in which the supernatants from one-way MLRs were used against resting peripheral blood mononuclear cells (PBMCs) derived from the same individual that contributed the stimulator cells for the respective MLR. DCA had a minimum effect on alloimmune T-cell clonal expansion, whereas it increased humoral immunity significantly. LW6 decreased both alloimmune T-cell proliferation and alloantibody production. The results indicate that MDH2 may be a perfect target for the development of new immunosuppressive medications, especially when inhibition of both cellular and humoral alloimmunity is desirable.
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Affiliation(s)
- Theodoros Eleftheriadis
- Department of Nephrology, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Georgios Pissas
- Department of Nephrology, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Athanasios Mavropoulos
- Department of Rheumatology and Clinical Immunology, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Vassilios Liakopoulos
- Department of Nephrology, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
| | - Ioannis Stefanidis
- Department of Nephrology, Faculty of Medicine, University of Thessaly, 41110 Larissa, Greece
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22
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Selfish brain and selfish immune system interplay: A theoretical framework for metabolic comorbidities of mood disorders. Neurosci Biobehav Rev 2017; 72:43-49. [DOI: 10.1016/j.neubiorev.2016.11.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 10/06/2016] [Accepted: 11/16/2016] [Indexed: 12/17/2022]
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23
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Saha A, O'Connor RS, Thangavelu G, Lovitch SB, Dandamudi DB, Wilson CB, Vincent BG, Tkachev V, Pawlicki JM, Furlan SN, Kean LS, Aoyama K, Taylor PA, Panoskaltsis-Mortari A, Foncea R, Ranganathan P, Devine SM, Burrill JS, Guo L, Sacristan C, Snyder NW, Blair IA, Milone MC, Dustin ML, Riley JL, Bernlohr DA, Murphy WJ, Fife BT, Munn DH, Miller JS, Serody JS, Freeman GJ, Sharpe AH, Turka LA, Blazar BR. Programmed death ligand-1 expression on donor T cells drives graft-versus-host disease lethality. J Clin Invest 2016; 126:2642-60. [PMID: 27294527 DOI: 10.1172/jci85796] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Accepted: 04/28/2016] [Indexed: 12/20/2022] Open
Abstract
Programmed death ligand-1 (PD-L1) interaction with PD-1 induces T cell exhaustion and is a therapeutic target to enhance immune responses against cancer and chronic infections. In murine bone marrow transplant models, PD-L1 expression on host target tissues reduces the incidence of graft-versus-host disease (GVHD). PD-L1 is also expressed on T cells; however, it is unclear whether PD-L1 on this population influences immune function. Here, we examined the effects of PD-L1 modulation of T cell function in GVHD. In patients with severe GVHD, PD-L1 expression was increased on donor T cells. Compared with mice that received WT T cells, GVHD was reduced in animals that received T cells from Pdl1-/- donors. PD-L1-deficient T cells had reduced expression of gut homing receptors, diminished production of inflammatory cytokines, and enhanced rates of apoptosis. Moreover, multiple bioenergetic pathways, including aerobic glycolysis, oxidative phosphorylation, and fatty acid metabolism, were also reduced in T cells lacking PD-L1. Finally, the reduction of acute GVHD lethality in mice that received Pdl1-/- donor cells did not affect graft-versus-leukemia responses. These data demonstrate that PD-L1 selectively enhances T cell-mediated immune responses, suggesting a context-dependent function of the PD-1/PD-L1 axis, and suggest selective inhibition of PD-L1 on donor T cells as a potential strategy to prevent or ameliorate GVHD.
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Champagne DP, Hatle KM, Fortner KA, D'Alessandro A, Thornton TM, Yang R, Torralba D, Tomás-Cortázar J, Jun YW, Ahn KH, Hansen KC, Haynes L, Anguita J, Rincon M. Fine-Tuning of CD8(+) T Cell Mitochondrial Metabolism by the Respiratory Chain Repressor MCJ Dictates Protection to Influenza Virus. Immunity 2016; 44:1299-311. [PMID: 27234056 DOI: 10.1016/j.immuni.2016.02.018] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 02/18/2016] [Accepted: 02/18/2016] [Indexed: 12/27/2022]
Abstract
Mitochondrial respiration is regulated in CD8(+) T cells during the transition from naive to effector and memory cells, but mechanisms controlling this process have not been defined. Here we show that MCJ (methylation-controlled J protein) acted as an endogenous break for mitochondrial respiration in CD8(+) T cells by interfering with the formation of electron transport chain respiratory supercomplexes. Metabolic profiling revealed enhanced mitochondrial metabolism in MCJ-deficient CD8(+) T cells. Increased oxidative phosphorylation and subcellular ATP accumulation caused by MCJ deficiency selectively increased the secretion, but not expression, of interferon-γ. MCJ also adapted effector CD8(+) T cell metabolism during the contraction phase. Consequently, memory CD8(+) T cells lacking MCJ provided superior protection against influenza virus infection. Thus, MCJ offers a mechanism for fine-tuning CD8(+) T cell mitochondrial metabolism as an alternative to modulating mitochondrial mass, an energetically expensive process. MCJ could be a therapeutic target to enhance CD8(+) T cell responses.
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Affiliation(s)
- Devin P Champagne
- Program in Immunobiology, Department of Medicine, University of Vermont, Burlington, Vermont, 05405 USA
| | - Ketki M Hatle
- Program in Immunobiology, Department of Medicine, University of Vermont, Burlington, Vermont, 05405 USA
| | - Karen A Fortner
- Program in Immunobiology, Department of Medicine, University of Vermont, Burlington, Vermont, 05405 USA
| | - Angelo D'Alessandro
- Department of Biochemistry and Molecular Genetics, University of Colorado Denver, Aurora, CO 80045, USA
| | - Tina M Thornton
- Program in Immunobiology, Department of Medicine, University of Vermont, Burlington, Vermont, 05405 USA
| | - Rui Yang
- Program in Immunobiology, Department of Medicine, University of Vermont, Burlington, Vermont, 05405 USA
| | - Daniel Torralba
- Program in Immunobiology, Department of Medicine, University of Vermont, Burlington, Vermont, 05405 USA
| | - Julen Tomás-Cortázar
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Derio 48160 Bizkaia, Spain
| | - Yong Woong Jun
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Pohang University of Science and Technology (POSTECH), Nam-Gu, Pohang, 790-784 Gyeongbuk, Republic of Korea
| | - Kyo Han Ahn
- Department of Chemistry, Center for Electro-Photo Behaviors in Advanced Molecular Systems, Pohang University of Science and Technology (POSTECH), Nam-Gu, Pohang, 790-784 Gyeongbuk, Republic of Korea
| | - Kirk C Hansen
- Department of Biochemistry and Molecular Genetics, University of Colorado Denver, Aurora, CO 80045, USA
| | - Laura Haynes
- Center on Aging and Department of Immunology, University of Connecticut Health Center, Farmington, CT 06030 USA
| | - Juan Anguita
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Derio 48160 Bizkaia, Spain; Ikerbasque, Basque Foundation for Science, Bilbao, Bizkaia, Spain
| | - Mercedes Rincon
- Program in Immunobiology, Department of Medicine, University of Vermont, Burlington, Vermont, 05405 USA.
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25
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Weisel FJ, Zuccarino-Catania GV, Chikina M, Shlomchik MJ. A Temporal Switch in the Germinal Center Determines Differential Output of Memory B and Plasma Cells. Immunity 2016; 44:116-130. [PMID: 26795247 DOI: 10.1016/j.immuni.2015.12.004] [Citation(s) in RCA: 361] [Impact Index Per Article: 45.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2015] [Revised: 08/15/2015] [Accepted: 09/24/2015] [Indexed: 10/22/2022]
Abstract
There is little insight into or agreement about the signals that control differentiation of memory B cells (MBCs) and long-lived plasma cells (LLPCs). By performing BrdU pulse-labeling studies, we found that MBC formation preceded the formation of LLPCs in an adoptive transfer immunization system, which allowed for a synchronized Ag-specific response with homogeneous Ag-receptor, yet at natural precursor frequencies. We confirmed these observations in wild-type (WT) mice and extended them with germinal center (GC) disruption experiments and variable region gene sequencing. We thus show that the GC response undergoes a temporal switch in its output as it matures, revealing that the reaction engenders both MBC subsets with different immune effector function and, ultimately, LLPCs at largely separate points in time. These data demonstrate the kinetics of the formation of the cells that provide stable humoral immunity and therefore have implications for autoimmunity, for vaccine development, and for understanding long-term pathogen resistance.
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Affiliation(s)
- Florian J Weisel
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA
| | | | - Maria Chikina
- Department of Computational and Systems Biology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15260, USA
| | - Mark J Shlomchik
- Department of Laboratory Medicine, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15261, USA; Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA.
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26
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Abstract
Mechanistic target of rapamycin (mTOR, also known as mammalian target of rapamycin) is a ubiquitous serine/threonine kinase that regulates cell growth, proliferation and survival. These effects are cell-type-specific, and are elicited in response to stimulation by growth factors, hormones and cytokines, as well as to internal and external metabolic cues. Rapamycin was initially developed as an inhibitor of T-cell proliferation and allograft rejection in the organ transplant setting. Subsequently, its molecular target (mTOR) was identified as a component of two interacting complexes, mTORC1 and mTORC2, that regulate T-cell lineage specification and macrophage differentiation. mTORC1 drives the proinflammatory expansion of T helper (TH) type 1, TH17, and CD4(-)CD8(-) (double-negative, DN) T cells. Both mTORC1 and mTORC2 inhibit the development of CD4(+)CD25(+)FoxP3(+) T regulatory (TREG) cells and, indirectly, mTORC2 favours the expansion of T follicular helper (TFH) cells which, similarly to DN T cells, promote B-cell activation and autoantibody production. In contrast to this proinflammatory effect of mTORC2, mTORC1 favours, to some extent, an anti-inflammatory macrophage polarization that is protective against infections and tissue inflammation. Outside the immune system, mTORC1 controls fibroblast proliferation and chondrocyte survival, with implications for tissue fibrosis and osteoarthritis, respectively. Rapamycin (which primarily inhibits mTORC1), ATP-competitive, dual mTORC1/mTORC2 inhibitors and upstream regulators of the mTOR pathway are being developed to treat autoimmune, hyperproliferative and degenerative diseases. In this regard, mTOR blockade promises to increase life expectancy through treatment and prevention of rheumatic diseases.
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Affiliation(s)
- Andras Perl
- Division of Rheumatology, Departments of Medicine, Microbiology and Immunology, and Biochemistry and Molecular Biology, State University of New York, Upstate Medical University, College of Medicine, 750 East Adams Street, Syracuse, New York 13210, USA
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27
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Shadel GS, Horvath TL. Mitochondrial ROS signaling in organismal homeostasis. Cell 2015; 163:560-9. [PMID: 26496603 DOI: 10.1016/j.cell.2015.10.001] [Citation(s) in RCA: 831] [Impact Index Per Article: 92.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Indexed: 02/07/2023]
Abstract
Generation, transformation, and utilization of organic molecules in support of cellular differentiation, growth, and maintenance are basic tenets that define life. In eukaryotes, mitochondrial oxygen consumption plays a central role in these processes. During the process of oxidative phosphorylation, mitochondria utilize oxygen to generate ATP from organic fuel molecules but in the process also produce reactive oxygen species (ROS). While ROS have long been appreciated for their damage-promoting, detrimental effects, there is now a greater understanding of their roles as signaling molecules. Here, we review mitochondrial ROS-mediated signaling pathways with an emphasis on how they are involved in various basal and adaptive physiological responses that control organismal homeostasis.
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Affiliation(s)
- Gerald S Shadel
- Department of Pathology, Yale School of Medicine, New Haven CT 06520; Department of Genetics, Yale School of Medicine, New Haven CT 06520; Program in Integrative Cell Signaling and Neurobiology of Metabolism, Yale School of Medicine, New Haven CT 06520.
| | - Tamas L Horvath
- Program in Integrative Cell Signaling and Neurobiology of Metabolism, Yale School of Medicine, New Haven CT 06520; Section of Comparative Medicine, Yale School of Medicine, New Haven CT 06520; Department of Neurobiology, Yale School of Medicine, New Haven CT 06520.
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28
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Cohen J, Vincent JL, Adhikari NKJ, Machado FR, Angus DC, Calandra T, Jaton K, Giulieri S, Delaloye J, Opal S, Tracey K, van der Poll T, Pelfrene E. Sepsis: a roadmap for future research. THE LANCET. INFECTIOUS DISEASES 2015; 15:581-614. [DOI: 10.1016/s1473-3099(15)70112-x] [Citation(s) in RCA: 658] [Impact Index Per Article: 73.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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29
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Perl A. mTOR activation is a biomarker and a central pathway to autoimmune disorders, cancer, obesity, and aging. Ann N Y Acad Sci 2015; 1346:33-44. [PMID: 25907074 DOI: 10.1111/nyas.12756] [Citation(s) in RCA: 159] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The mechanistic target of rapamycin (mTOR) is a ubiquitous serine/threonine kinase, which plays pivotal roles in integrating growth signals on a cellular level. To support proliferation and survival under stress, two interacting complexes that harbor mTOR, mTORC1 and mTORC2, promote the transcription of genes involved in carbohydrate metabolism and lipogenesis, enhance protein translation, and inhibit autophagy. Although rapamycin was originally developed as an inhibitor of T cell proliferation for preventing organ transplant rejection, its molecular target, mTOR, has been subsequently identified as a central regulator of metabolic cues that drive lineage specification in the immune system. Owing to oxidative stress, the activation of mTORC1 has emerged as a central pathway for the pathogenesis of systemic lupus erythematosus and other autoimmune diseases. Paradoxically, mTORC1 has also been identified as a mediator of the Warburg effect that allows cell survival under hypoxia. Rapamycin and new classes of mTOR inhibitors are being developed to block not only transplant rejection and autoimmunity but also to treat obesity and various forms of cancer. Through preventing these diseases, personalized mTOR blockade holds promise to extend life span.
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Affiliation(s)
- Andras Perl
- Division of Rheumatology, Department of Medicine State University of New York, Upstate Medical University, College of Medicine, Syracuse, New York.,Division of Rheumatology, Department of Microbiology and Immunology, State University of New York, Upstate Medical University, College of Medicine, Syracuse, New York
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30
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De Riccardis L, Rizzello A, Ferramosca A, Urso E, De Robertis F, Danieli A, Giudetti AM, Trianni G, Zara V, Maffia M. Bioenergetics profile of CD4(+) T cells in relapsing remitting multiple sclerosis subjects. J Biotechnol 2015; 202:31-9. [PMID: 25701681 DOI: 10.1016/j.jbiotec.2015.02.015] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 02/06/2015] [Accepted: 02/11/2015] [Indexed: 12/17/2022]
Abstract
Multiple sclerosis (MS) is a chronic inflammatory autoimmune demyelinating disease of the central nervous system. There are four clinical forms of MS, the most common of which is characterized by a relapsing remitting course (RRMS). The etiology of MS is unknown, but many studies suggested that genetic, environmental and infectious agents may contribute to the development of this disease. In experimental autoimmune encephalomyelitis (EAE), the animal model for MS, it has been shown that CD4(+) T cells play a key role in MS pathogenesis. In fact, these cells are able to cross the blood-brain barrier and cause axonal damage with neuronal death. T cell activation critically depends on mitochondrial ATP synthesis and reactive oxygen species (ROS) production. Interestingly, lots of studies linked the oxidative damage arising from mitochondrial changes to neurodegenerative disorders, such as MS. Based on these evidences, this work focused on the metabolic reprogramming of CD4(+) T cells in MS subjects, being this cell population directly implicated in pathogenesis of disease, paying attention to mitochondrial function and response to oxidative stress. Such aspects, once clarified, may open new opportunities for a therapeutic metabolic modulation of MS disorder.
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Affiliation(s)
- Lidia De Riccardis
- Department of Biological and Environmental Sciences and Technologies, University of Salento, via Monteroni, Lecce, Italy
| | - Antonia Rizzello
- Department of Biological and Environmental Sciences and Technologies, University of Salento, via Monteroni, Lecce, Italy
| | - Alessandra Ferramosca
- Department of Biological and Environmental Sciences and Technologies, University of Salento, via Monteroni, Lecce, Italy
| | - Emanuela Urso
- Department of Biological and Environmental Sciences and Technologies, University of Salento, via Monteroni, Lecce, Italy
| | | | - Antonio Danieli
- Department of Biological and Environmental Sciences and Technologies, University of Salento, via Monteroni, Lecce, Italy
| | - Anna Maria Giudetti
- Department of Biological and Environmental Sciences and Technologies, University of Salento, via Monteroni, Lecce, Italy
| | - Giorgio Trianni
- Department of Neurology, "Vito Fazzi" Hospital, ASL-Lecce, Italy
| | - Vincenzo Zara
- Department of Biological and Environmental Sciences and Technologies, University of Salento, via Monteroni, Lecce, Italy
| | - Michele Maffia
- Department of Biological and Environmental Sciences and Technologies, University of Salento, via Monteroni, Lecce, Italy.
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31
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Howie D, Waldmann H, Cobbold S. Nutrient Sensing via mTOR in T Cells Maintains a Tolerogenic Microenvironment. Front Immunol 2014; 5:409. [PMID: 25221554 PMCID: PMC4147234 DOI: 10.3389/fimmu.2014.00409] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 08/13/2014] [Indexed: 01/01/2023] Open
Abstract
We have proposed that tolerance can be maintained through the induction, by Treg cells, of a tolerogenic microenvironment within tolerated tissues that inhibits effector cell activity but which supports the generation of further Treg cells by “infectious tolerance.” Two important components of this tolerogenic microenvironment depend on metabolism and nutrient sensing. The first is due to the up-regulation of multiple enzymes that consume essential amino acids, which are sensed in naïve T cells primarily via inhibition of the mechanistic target of rapamycin (mTOR) pathway, which in turn encourages their further differentiation into FOXP3+ Treg cells. The second mechanism is the metabolism of extracellular ATP to adenosine by the ectoenzymes CD39 and CD73. These two enzymes are constitutively co-expressed on Treg cells, but can also be induced on a wide variety of cell types by TGFβ and the adenosine generated can be shown to be a potent inhibitor of T cell proliferation. This review will focus on mechanisms of nutrient sensing in T cells, how these are integrated with TCR and cytokine signals via the mTOR pathway, and what impact this has on intracellular metabolism and subsequently the control of differentiation into different effector or regulatory T cell subsets.
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Affiliation(s)
- Duncan Howie
- Sir William Dunn School of Pathology, University of Oxford , Oxford , UK
| | - Herman Waldmann
- Sir William Dunn School of Pathology, University of Oxford , Oxford , UK
| | - Stephen Cobbold
- Sir William Dunn School of Pathology, University of Oxford , Oxford , UK
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32
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O'Sullivan D, van der Windt GJW, Huang SCC, Curtis JD, Chang CH, Buck MD, Qiu J, Smith AM, Lam WY, DiPlato LM, Hsu FF, Birnbaum MJ, Pearce EJ, Pearce EL. Memory CD8(+) T cells use cell-intrinsic lipolysis to support the metabolic programming necessary for development. Immunity 2014; 41:75-88. [PMID: 25001241 DOI: 10.1016/j.immuni.2014.06.005] [Citation(s) in RCA: 571] [Impact Index Per Article: 57.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 06/18/2014] [Indexed: 12/11/2022]
Abstract
Generation of CD8(+) memory T cells requires metabolic reprogramming that is characterized by enhanced mitochondrial fatty-acid oxidation (FAO). However, where the fatty acids (FA) that fuel this process come from remains unclear. While CD8(+) memory T cells engage FAO to a greater extent, we found that they acquired substantially fewer long-chain FA from their external environment than CD8(+) effector T (Teff) cells. Rather than using extracellular FA directly, memory T cells used extracellular glucose to support FAO and oxidative phosphorylation (OXPHOS), suggesting that lipids must be synthesized to generate the substrates needed for FAO. We have demonstrated that memory T cells rely on cell intrinsic expression of the lysosomal hydrolase LAL (lysosomal acid lipase) to mobilize FA for FAO and memory T cell development. Our observations link LAL to metabolic reprogramming in lymphocytes and show that cell intrinsic lipolysis is deterministic for memory T cell fate.
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Affiliation(s)
- David O'Sullivan
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Gerritje J W van der Windt
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Stanley Ching-Cheng Huang
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jonathan D Curtis
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Chih-Hao Chang
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Michael D Buck
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Jing Qiu
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Amber M Smith
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Wing Y Lam
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Lisa M DiPlato
- The Institute for Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Fong-Fu Hsu
- Mass Spectrometry Resource, Division of Endocrinology, Diabetes, Metabolism, and Lipid Research, Department of Internal Medicine, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Morris J Birnbaum
- The Institute for Diabetes, Obesity, and Metabolism, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Edward J Pearce
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA
| | - Erika L Pearce
- Department of Pathology & Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.
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33
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Lymphocyte glucose and glutamine metabolism as targets of the anti-inflammatory and immunomodulatory effects of exercise. Mediators Inflamm 2014; 2014:326803. [PMID: 24987195 PMCID: PMC4060061 DOI: 10.1155/2014/326803] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 04/23/2014] [Accepted: 05/06/2014] [Indexed: 12/30/2022] Open
Abstract
Glucose and glutamine are important energetic and biosynthetic nutrients for T and B lymphocytes. These cells consume both nutrients at high rates in a function-dependent manner. In other words, the pathways that control lymphocyte function and survival directly control the glucose and glutamine metabolic pathways. Therefore, lymphocytes in different functional states reprogram their glucose and glutamine metabolism to balance their requirement for ATP and macromolecule production. The tight association between metabolism and function in these cells was suggested to introduce the possibility of several pathologies resulting from the inability of lymphocytes to meet their nutrient demands under a given condition. In fact, disruptions in lymphocyte metabolism and function have been observed in different inflammatory, metabolic, and autoimmune pathologies. Regular physical exercise and physical activity offer protection against several chronic pathologies, and this benefit has been associated with the anti-inflammatory and immunomodulatory effects of exercise/physical activity. Chronic exercise induces changes in lymphocyte functionality and substrate metabolism. In the present review, we discuss whether the beneficial effects of exercise on lymphocyte function in health and disease are associated with modulation of the glucose and glutamine metabolic pathways.
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34
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Cobbold SP. The mTOR pathway and integrating immune regulation. Immunology 2014; 140:391-8. [PMID: 23952610 DOI: 10.1111/imm.12162] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 08/08/2013] [Accepted: 08/12/2013] [Indexed: 12/18/2022] Open
Abstract
The mammalian target of rapamycin (mTOR) pathway is an important integrator of nutrient-sensing signals in all mammalian cells, and acts to coordinate the cell proliferation with the availability of nutrients such as glucose, amino acids and energy (oxygen and ATP). A large part of the immune response depends on the proliferation and clonal expansion of antigen-specific T cells, which depends on mTOR activation, and the pharmacological inhibition of this pathway by rapamycin is therefore potently immunosuppressive. It is only recently, however, that we have started to understand the more subtle details of how the mTOR pathway is involved in controlling the differentiation of effector versus memory CD8(+) T cells and the decision to generate different CD4(+) helper T-cell subsets. In particular, this review will focus on how nutrient sensing via mTOR controls the expression of the master transcription factor for regulatory T cells in order to maintain the balance between tolerance and inflammation.
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Affiliation(s)
- Stephen P Cobbold
- Sir William Dunn School of Pathology, University of Oxford, Oxford, UK
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