151
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Raud B, McGuire PJ, Jones RG, Sparwasser T, Berod L. Fatty acid metabolism in CD8 + T cell memory: Challenging current concepts. Immunol Rev 2019; 283:213-231. [PMID: 29664569 DOI: 10.1111/imr.12655] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
CD8+ T cells are key members of the adaptive immune response against infections and cancer. As we discuss in this review, these cells can present diverse metabolic requirements, which have been intensely studied during the past few years. Our current understanding suggests that aerobic glycolysis is a hallmark of activated CD8+ T cells, while naive and memory (Tmem ) cells often rely on oxidative phosphorylation, and thus mitochondrial metabolism is a crucial determinant of CD8+ Tmem cell development. Moreover, it has been proposed that CD8+ Tmem cells have a specific requirement for the oxidation of long-chain fatty acids (LC-FAO), a process modulated in lymphocytes by the enzyme CPT1A. However, this notion relies heavily on the metabolic analysis of in vitro cultures and on chemical inhibition of CPT1A. Therefore, we introduce more recent studies using genetic models to demonstrate that CPT1A-mediated LC-FAO is dispensable for the development of CD8+ T cell memory and protective immunity, and question the use of chemical inhibitors to target this enzyme. We discuss insights obtained from those and other studies analyzing the metabolic characteristics of CD8+ Tmem cells, and emphasize how T cells exhibit flexibility in their choice of metabolic fuel.
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Affiliation(s)
- Brenda Raud
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Peter J McGuire
- Metabolism, Infection, and Immunity Section, National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - Russell G Jones
- Department of Physiology, Goodman Cancer Research Centre, McGill University, Montreal, QC, Canada
| | - Tim Sparwasser
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
| | - Luciana Berod
- Institute of Infection Immunology, TWINCORE, Centre for Experimental and Clinical Infection Research, a joint venture between the Medical School Hannover (MHH) and the Helmholtz Centre for Infection Research (HZI), Hannover, Germany
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152
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Welten SPM, Sandu I, Baumann NS, Oxenius A. Memory CD8 T cell inflation vs tissue-resident memory T cells: Same patrollers, same controllers? Immunol Rev 2019; 283:161-175. [PMID: 29664565 DOI: 10.1111/imr.12649] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The induction of long-lived populations of memory T cells residing in peripheral tissues is of considerable interest for T cell-based vaccines, as they can execute immediate effector functions and thus provide protection in case of pathogen encounter at mucosal and barrier sites. Cytomegalovirus (CMV)-based vaccines support the induction and accumulation of a large population of effector memory CD8 T cells in peripheral tissues, in a process called memory inflation. Tissue-resident memory (TRM ) T cells, induced by various infections and vaccination regimens, constitute another subset of memory cells that take long-term residence in peripheral tissues. Both memory T cell subsets have evoked substantial interest in exploitation for vaccine purposes. However, a direct comparison between these two peripheral tissue-localizing memory T cell subsets with respect to their short- and long-term ability to provide protection against heterologous challenge is pending. Here, we discuss communalities and differences between TRM and inflationary CD8 T cells with respect to their development, maintenance, function, and protective capacity. In addition, we discuss differences and similarities between the transcriptional profiles of TRM and inflationary T cells, supporting the notion that they are distinct memory T cell populations.
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Affiliation(s)
- Suzanne P M Welten
- Institute of Microbiology, Department of Biology, ETH Zürich, Zürich, Switzerland
| | - Ioana Sandu
- Institute of Microbiology, Department of Biology, ETH Zürich, Zürich, Switzerland
| | - Nicolas S Baumann
- Institute of Microbiology, Department of Biology, ETH Zürich, Zürich, Switzerland
| | - Annette Oxenius
- Institute of Microbiology, Department of Biology, ETH Zürich, Zürich, Switzerland
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153
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Rostamzadeh D, Yousefi M, Haghshenas MR, Ahmadi M, Dolati S, Babaloo Z. mTOR Signaling pathway as a master regulator of memory CD8 + T-cells, Th17, and NK cells development and their functional properties. J Cell Physiol 2019; 234:12353-12368. [PMID: 30710341 DOI: 10.1002/jcp.28042] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 12/03/2018] [Indexed: 12/27/2022]
Abstract
The mammalian target of rapamycin (mTOR) is a member of the evolutionary phosphatidylinositol kinase-related kinases (PIKKs). mTOR plays a pivotal role in the regulation of diverse aspects of cellular physiology such as body metabolism, cell growth, protein synthesis, cell size, autophagy, and cell differentiation. Immunologically, mTOR has a fundamental part in controlling and shaping diverse functions of innate and adaptive immune cells, in particular, T-cell subsets differentiation, survival, and metabolic reprogramming to ultimately regulate the fate of diverse immune cell types. Researchers report that rapamycin, a selective mTOR inhibitor, and immunosuppressive agent, has surprising immunostimulatory effects on inducing both quantitative and qualitative aspects of virus-specific memory CD8+ T-cells differentiation and homeostasis in a T-cell-intrinsic manner. The mTOR signaling pathway also plays a critical role in dictating the outcome of regulatory T cells (Treg), T helper 17 (Th17) cells, and natural killer (NK) cells proliferation and maturation, as well as the effector functions and cytotoxic properties of NK cells. Manipulation of mTOR activity is a critical therapeutic approach for pharmacological agents that seek to inhibit mTOR. This approach should enhance specific memory CD8 + T-cells responses and induce fully functional effector properties of NK cells to provoke their antitumor and antiviral activities.
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Affiliation(s)
- Davood Rostamzadeh
- Department of Immunology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Shiraz Institute for Cancer Research, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mehdi Yousefi
- Department of Immunology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Student's Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Reza Haghshenas
- Shiraz Institute for Cancer Research, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Majid Ahmadi
- Department of Immunology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Stem Cell and Regenerative Medicine Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sanam Dolati
- Department of Immunology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.,Aging Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Zohreh Babaloo
- Immunology Unit, Drug Applied Research Center, Tabriz University of Medical Sciences.,Head of Immunology Department, Medicine Faculty, Tabriz University of Medical Science
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154
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Jitschin R, Böttcher M, Saul D, Lukassen S, Bruns H, Loschinski R, Ekici AB, Reis A, Mackensen A, Mougiakakos D. Inflammation-induced glycolytic switch controls suppressivity of mesenchymal stem cells via STAT1 glycosylation. Leukemia 2019; 33:1783-1796. [PMID: 30679801 DOI: 10.1038/s41375-018-0376-6] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Revised: 11/19/2018] [Accepted: 12/07/2018] [Indexed: 02/06/2023]
Abstract
Mesenchymal stem cells (MSCs) represent key contributors to tissue homeostasis and promising therapeutics for hyperinflammatory conditions including graft-versus-host disease. Their immunomodulatory effects are controlled by microenvironmental signals. The MSCs' functional response towards inflammatory cues is known as MSC-"licensing" and includes indoleamine 2,3-dioxygenase (IDO) upregulation. MSCs use tryptophan-depleting IDO to suppress T-cells. Increasing evidence suggests that several functions are (co-)determined by the cells' metabolic commitment. MSCs are capable of both, high levels of glycolysis and of oxidative phosphorylation. Although several studies have addressed alterations of the immune regulatory phenotype elicited by inflammatory priming metabolic mechanisms controlling this process remain unknown. We demonstrate that inflammatory MSC-licensing causes metabolic shifts including enhanced glycolysis and increased fatty acid oxidation. Yet, only interfering with glycolysis impacts IDO upregulation and impedes T-cell-suppressivity. We identified the Janus kinase (JAK)/signal transducer and activator of transcription (STAT)1 pathway as a regulator of both glycolysis and IDO, and show that enhanced glucose turnover is linked to abundant STAT1 glycosylation. Inhibiting the responsible O-acetylglucosamine (O-GlcNAc) transferase abolishes STAT1 activity together with IDO upregulation. Our data suggest that STAT1-O-GlcNAcylation increases its stability towards degradation thus sustaining downstream effects. This pathway could represent a target for interventions aiming to enhance the MSCs' immunoregulatory potency.
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Affiliation(s)
- R Jitschin
- Department of Medicine 5 for Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - M Böttcher
- Department of Medicine 5 for Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - D Saul
- Department of Medicine 5 for Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - S Lukassen
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - H Bruns
- Department of Medicine 5 for Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - R Loschinski
- Department of Medicine 5 for Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - A B Ekici
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - A Reis
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - A Mackensen
- Department of Medicine 5 for Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany
| | - D Mougiakakos
- Department of Medicine 5 for Hematology and Oncology, Friedrich-Alexander-Universität Erlangen-Nürnberg, 91054, Erlangen, Germany.
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155
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Insulin Receptor-Mediated Stimulation Boosts T Cell Immunity during Inflammation and Infection. Cell Metab 2018; 28:922-934.e4. [PMID: 30174303 DOI: 10.1016/j.cmet.2018.08.003] [Citation(s) in RCA: 170] [Impact Index Per Article: 28.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Revised: 05/02/2018] [Accepted: 08/01/2018] [Indexed: 01/04/2023]
Abstract
T cells represent a critical effector of cell-mediated immunity. Activated T cells engage in metabolic reprogramming during effector differentiation to accommodate dynamic changes in energy demands. Here, we show that the hormone, insulin, and downstream signaling through its insulin receptor shape adaptive immune function through modulating T cell metabolism. T cells lacking insulin receptor expression (LckCre+ Insrfl/fl) show reduced antigen-specific proliferation and compromised production of pro-inflammatory cytokines. In vivo, T cell-specific insulin receptor deficiency reduces T cell-driven colonic inflammation. In a model of severe influenza infection with A/PR8 (H1N1), lack of insulin receptor on T cells curtails antigen-specific immunity to influenza viral antigens. Mechanistically, insulin receptor signaling reinforces a metabolic program that supports T cell nutrient uptake and associated glycolytic and respiratory capacities. These data highlight insulin receptor signaling as an important node integrating immunometabolic pathways to drive optimal T cell effector function in health and disease.
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156
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Eomesodermin driven IL-10 production in effector CD8 + T cells promotes a memory phenotype. Cell Immunol 2018; 335:93-102. [PMID: 30528350 DOI: 10.1016/j.cellimm.2018.11.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/29/2018] [Accepted: 11/30/2018] [Indexed: 12/17/2022]
Abstract
CD8+ T cell differentiation is controlled by the transcription factors T-bet and Eomesodermin, in concert with the cytokines IL-2, IL-10 and IL-12. Among these pathways, the mechanisms by which T-box proteins and IL-10 interact to promote a memory T cell fate remain poorly understood. Here, we show that Eomes and IL-10 drive a central memory phenotype in murine CD8+ T cells. Eomes expression led to increased IL-10 expression by the effector CD8+ T cells themselves as well as an increase in the level of the lymph node homing selectin CD62L. Furthermore, exposure of effector CD8+ T cells to IL-10 maintained CD62L expression levels in culture. Thus, Eomes promotes a step-wise transition of effector T cells towards a memory phenotype, synergizing with IL-10 to enhance the expression of CD62L. The early augmentation of lymph node homing markers by Eomes may facilitate the retention of effector T cells in the relatively low inflammatory milieu of the secondary lymphoid organs that promotes central memory development.
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157
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Steinbach K, Vincenti I, Merkler D. Resident-Memory T Cells in Tissue-Restricted Immune Responses: For Better or Worse? Front Immunol 2018; 9:2827. [PMID: 30555489 PMCID: PMC6284001 DOI: 10.3389/fimmu.2018.02827] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 11/15/2018] [Indexed: 12/13/2022] Open
Abstract
Tissue-resident-memory CD8+ T cells (TRM) have been described as a non-circulating memory T cell subset that persists at sites of previous infection. While TRM in all non-lymphoid organs probably share a core signature differentiation pathway, certain aspects of their maintenance and effector functions may vary. It is well-established that TRM provide long-lived protective immunity through immediate effector function and accelerated recruitment of circulating immune cells. Besides immune defense against pathogens, other immunological roles of TRM are less well-studied. Likewise, evidence of a putative detrimental role of TRM for inflammatory diseases is only beginning to emerge. In this review, we discuss the protective and harmful role of TRM in organ-specific immunity and immunopathology as well as prospective implications for immunomodulatory therapy.
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Affiliation(s)
- Karin Steinbach
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | - Ilena Vincenti
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland
| | - Doron Merkler
- Department of Pathology and Immunology, University of Geneva, Geneva, Switzerland.,Division of Clinical Pathology, Geneva University Hospital, Geneva, Switzerland
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158
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Kavazović I, Polić B, Wensveen FM. Cheating the Hunger Games; Mechanisms Controlling Clonal Diversity of CD8 Effector and Memory Populations. Front Immunol 2018; 9:2831. [PMID: 30555492 PMCID: PMC6281969 DOI: 10.3389/fimmu.2018.02831] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Accepted: 11/16/2018] [Indexed: 11/23/2022] Open
Abstract
Effector and memory CD8 T cells have an intrinsic difference in the way they must approach antigen; effector cells need to address the pathogen at hand and therefore favor outgrowth of only high-affinity clones. In contrast, the memory pool benefits from greater clonal diversity to recognize and eliminate pathogens with mutations in their immunogenic epitopes. Effector and memory fates are ultimately the result of the same three signals that control T cell activation; T cell receptor (TCR) engagement together with co-stimulation and cytokines. Great progress has been made in our understanding of the transcriptional programs that drive effector or memory differentiation. However, how these two different programs result from the same initial cues is still a matter of debate. An emerging image is that not only the classical three signals determine T cell differentiation, but also the ability of cells to access these signals relative to that of other activated clones. Inter-clonal competition is therefore not only a selective force, but also a mediator of CD8 T cell fate. How this is regulated on a transcriptional level, especially in the context of a selective “hunger game” based on antigen-affinity in which only cells of high-affinity are supposed to survive, is still poorly defined. In this review, we discuss recent literature that illustrates how antigen-affinity dependent inter-clonal competition shapes effector and memory populations in an environment of antigen affinity-driven selection. We argue that fine-tuning of TCR signal intensity presents an attractive target for regulating the scope of CD8 T cell vaccines.
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Affiliation(s)
- Inga Kavazović
- Department of Histology & Embryology University of Rijeka, Rijeka, Croatia
| | - Bojan Polić
- Department of Histology & Embryology University of Rijeka, Rijeka, Croatia
| | - Felix M Wensveen
- Department of Histology & Embryology University of Rijeka, Rijeka, Croatia.,Department of Experimental Immunology, Amsterdam University Medical Center University of Amsterdam, Amsterdam, Netherlands
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159
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CD8+ T cells: mechanistic target of rapamycin and eukaryotic initiation factor 2 in elite HIV-1 control. AIDS 2018; 32:2835-2838. [PMID: 30407253 DOI: 10.1097/qad.0000000000002008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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160
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Rousseau B, Guillemin A, Duvoux C, Neuzillet C, Tlemsani C, Compagnon P, Azoulay D, Salloum C, Laurent A, de la Taille A, Salomon L, Cholley I, Haioun C, Dupuis J, Wolkenstein P, Matignon MB, Grimbert P, Tournigand C. Optimal oncologic management and mTOR inhibitor introduction are safe and improve survival in kidney and liver allograft recipients withde novocarcinoma. Int J Cancer 2018; 144:886-896. [DOI: 10.1002/ijc.31769] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 06/30/2018] [Accepted: 07/17/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Benoit Rousseau
- Medical Oncology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- IMRB, INSERM U955; University Paris Est Créteil, Team 18; 94100 Créteil France
| | - Aude Guillemin
- Medical Oncology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
| | - Christophe Duvoux
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Hepatology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Cindy Neuzillet
- Medical Oncology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
| | - Camille Tlemsani
- Medical Oncology, Cochin Hospital; Assistance Publique-Hôpitaux de Paris; 75014 Paris France
| | - Philippe Compagnon
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Visceral and hepatobiliary surgery, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Daniel Azoulay
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Visceral and hepatobiliary surgery, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Chaddy Salloum
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Visceral and hepatobiliary surgery, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Alexis Laurent
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Visceral and hepatobiliary surgery, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Alexandre de la Taille
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Urology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Laurent Salomon
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Urology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Irène Cholley
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Urology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Corinne Haioun
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Lymphoid Malignancies Unit, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Jehan Dupuis
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Lymphoid Malignancies Unit, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Pierre Wolkenstein
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Dermatology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Marie-Bénédicte Matignon
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Nephrology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Philippe Grimbert
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
- Nephrology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
| | - Christophe Tournigand
- Medical Oncology, Henri Mondor Hospital; Assistance Publique-Hôpitaux de Paris; 94100 Créteil France
- Faculty of Medicine; University of Paris-Est; 94000 Créteil France
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161
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Saeidi A, Zandi K, Cheok YY, Saeidi H, Wong WF, Lee CYQ, Cheong HC, Yong YK, Larsson M, Shankar EM. T-Cell Exhaustion in Chronic Infections: Reversing the State of Exhaustion and Reinvigorating Optimal Protective Immune Responses. Front Immunol 2018; 9:2569. [PMID: 30473697 PMCID: PMC6237934 DOI: 10.3389/fimmu.2018.02569] [Citation(s) in RCA: 208] [Impact Index Per Article: 34.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 10/18/2018] [Indexed: 12/31/2022] Open
Abstract
T-cell exhaustion is a phenomenon of dysfunction or physical elimination of antigen-specific T cells reported in human immunodeficiency virus (HIV), hepatitis B virus (HBV), and hepatitis C virus (HCV) infections as well as cancer. Exhaustion appears to be often restricted to CD8+ T cells responses in the literature, although CD4+ T cells have also been reported to be functionally exhausted in certain chronic infections. Although our understanding of the molecular mechanisms associated with the transcriptional regulation of T-cell exhaustion is advancing, it is imperative to also explore the central mechanisms that control the altered expression patterns. Targeting metabolic dysfunctions with mitochondrion-targeted antioxidants are also expected to improve the antiviral functions of exhausted virus-specific CD8+ T cells. In addition, it is crucial to consider the contributions of mitochondrial biogenesis on T-cell exhaustion and how mitochondrial metabolism of T cells could be targeted whilst treating chronic viral infections. Here, we review the current understanding of cardinal features of T-cell exhaustion in chronic infections, and have attempted to focus on recent discoveries, potential strategies to reverse exhaustion and reinvigorate optimal protective immune responses in the host.
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Affiliation(s)
- Alireza Saeidi
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia.,Center of Excellence for Research in AIDS, University of Malaya, Kuala Lumpur, Malaysia
| | - Keivan Zandi
- Department of Pediatrics School of Medicine Emory University, Atlanta, GA, United States
| | - Yi Ying Cheok
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Hamidreza Saeidi
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University of Putra Malaysia, Selangor, Malaysia
| | - Won Fen Wong
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Chalystha Yie Qin Lee
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Heng Choon Cheong
- Department of Medical Microbiology, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Yean Kong Yong
- Center of Excellence for Research in AIDS, University of Malaya, Kuala Lumpur, Malaysia.,Laboratory Center, Xiamen University Malaysia, Sepang, Malaysia
| | - Marie Larsson
- Division of Molecular Virology, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden
| | - Esaki Muthu Shankar
- Division of Infection Biology and Medical Microbiology, Department of Life Sciences, School of Life Sciences, Central University of Tamil Nadu, Thiruvarur, India
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162
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Liu S, Xu M, Zhu C, Zhao Q, Zhou F. Taste receptor T1R1/T1R3 promotes the tumoricidal activity of hepatic CD49a + CD49b - natural killer cells. Eur J Immunol 2018; 48:2031-2041. [PMID: 30259960 DOI: 10.1002/eji.201847688] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 08/05/2018] [Accepted: 09/27/2018] [Indexed: 12/15/2022]
Abstract
Natural Killer (NK) cell-based immunotherapy is a promising approach to treat hepatocellular carcinoma (HCC). The mechanisms underlying the regulation of NK cell activity are not completely understood. In this research, we identified the expression of taste receptor type 1 member 1 (T1R1) and taste receptor type 1 member 3 (T1R3) in a subset of hepatic NK cells in a mouse HCC model. T1R1 and T1R3 were selectively expressed in CD49a+ CD49b- NK cells in livers with HCC. In the in vitro cytotoxicity assay, amino acids promoted the tumoricidal effect of CD49a+ CD49b- NK cells through increasing the production of perforin, granzyme B and IFN-γ. Furthermore, using a lentivirus to induce the expression of exogenous T1R1 and T1R3 in normal hepatic NK cells, we found that amino acids enhanced NK cell-mediated cytotoxicity on tumor cells through the T1R1/T1R3 receptor, as demonstrated by more tumor cell lysis, up-regulation of perforin and granzyme B in comparison with control NK cells. In addition, amino acids activated Akt and mechanistic target of rapamycin complex 1 (mTORC1) signaling in NK cells through T1R1/T1R3 receptor. T-bet expression in NK cells was also increased by amino acid treatment. Therefore, T1R1/T1R3 receptor promotes the tumoricidal activity of hepatic CD49a+ CD49b- NK cells.
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Affiliation(s)
- Shaoping Liu
- Medical Research Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Min Xu
- Department of Hematology and Oncology, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chengliang Zhu
- Department of Clinical Laboratory, Renmin Hospital of Wuhan University, Wuhan, China
| | - Qiu Zhao
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Hubei Clinical Center and Key Laboratory for Intestinal and Colorectal Diseases, Wuhan, China
| | - Feng Zhou
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Hubei Clinical Center and Key Laboratory for Intestinal and Colorectal Diseases, Wuhan, China
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163
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Beziaud L, Boullerot L, Tran T, Mansi L, Marie-Joseph EL, Ravel P, Johannes L, Bayry J, Tartour E, Adotévi O. Rapalog combined with CCR4 antagonist improves anticancer vaccines efficacy. Int J Cancer 2018; 143:3008-3018. [PMID: 30183073 DOI: 10.1002/ijc.31842] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 07/28/2018] [Accepted: 08/09/2018] [Indexed: 12/28/2022]
Abstract
mTOR pathway inhibitors such as rapalogs represent a promising tool to induce functional memory CD8 T cells. In our study, we investigated the combination of temsirolimus with anticancer vaccines. Using various designs of cancer vaccines (short and long peptides or the B subunit of Shiga toxin as an antigen delivery vector) and tumor models (melanoma, lung and colon cancer), we showed that the administration of temsirolimus efficiently decreased tumor growth and enhanced tumor-specific CD8 T-cell responses induced by vaccination. Furthermore, tumor-specific CD8 T cells induced by the bi-therapy (vaccine + temsirolimus) exhibit phenotypic characteristics of central memory (CD127+ CD62L+ ) CD8 T cells compared to vaccination alone. We demonstrated that regulatory CD4 T cells (Tregs ) expansion in vivo limits the efficacy of the bi-therapy by altering the antitumor CD8 T-cell responses. Finally, the use of a small molecule CCR4 antagonist to prevent Tregs induction considerably improved the efficacy of the bi-therapy by enhancing CD8 T cells-mediated antitumor immunity. Taken together, our study highlights the potential interest of combining cancer vaccines with drugs that promote memory CD8 T cells and inhibit Tregs .
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Affiliation(s)
- Laurent Beziaud
- Université Bourgogne Franche-Comté, INSERM, EFS BFC, UMR1098, Interactions Hôte-Greffon-Tumeur/Ingénierie Cellulaire et Génique, Besançon, France
| | - Laura Boullerot
- Université Bourgogne Franche-Comté, INSERM, EFS BFC, UMR1098, Interactions Hôte-Greffon-Tumeur/Ingénierie Cellulaire et Génique, Besançon, France
| | - Thi Tran
- INSERM UMR970, Hôpital Europeen Georges Pompidou, Paris, France
| | - Laura Mansi
- Université Bourgogne Franche-Comté, INSERM, EFS BFC, UMR1098, Interactions Hôte-Greffon-Tumeur/Ingénierie Cellulaire et Génique, Besançon, France.,Department of Medical Oncology, University Hospital of Besançon, Besançon, France
| | - Elodie Lauret Marie-Joseph
- Université Bourgogne Franche-Comté, INSERM, EFS BFC, UMR1098, Interactions Hôte-Greffon-Tumeur/Ingénierie Cellulaire et Génique, Besançon, France
| | - Patrice Ravel
- IRCM - INSERM U1194, Institut de Recherche en Cancérologie de Montpellier, Equipe Bioinformatique et biologie des systèmes du cancer, Montpellier, France
| | - Ludger Johannes
- Institut Curie, PSL Research University, Chemical Biology of Membranes and Therapeutic Delivery Unit, INSERM U1143, Paris, France
| | - Jagadeesh Bayry
- INSERMCentre de Recherche des Cordeliers, Sorbonne Université Paris Descartes, Paris, France
| | - Eric Tartour
- INSERM UMR970, Hôpital Europeen Georges Pompidou, Paris, France.,Department of Biological Immunology, Assistance Publique-Hôpitaux de Paris, Paris, France.,University Paris Descartes, Paris, France
| | - Olivier Adotévi
- Université Bourgogne Franche-Comté, INSERM, EFS BFC, UMR1098, Interactions Hôte-Greffon-Tumeur/Ingénierie Cellulaire et Génique, Besançon, France.,Department of Medical Oncology, University Hospital of Besançon, Besançon, France
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164
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Olesin E, Nayar R, Saikumar-Lakshmi P, Berg LJ. The Transcription Factor Runx2 Is Required for Long-Term Persistence of Antiviral CD8 + Memory T Cells. Immunohorizons 2018; 2:251-261. [PMID: 30264035 PMCID: PMC6156005 DOI: 10.4049/immunohorizons.1800046] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
During acute lymphocytic choriomeningitis virus infection, pathogen-specific CD8+ cytotoxic T lymphocytes undergo clonal expansion leading to viral clearance. Following this, the majority of pathogen-specific CD8+ T cells undergo apoptosis, leaving a small number of memory CD8+ T cells that persist long-term and provide rapid protection upon secondary infection. Whereas much is known about the cytokines and transcription factors that regulate the early effector phase of the antiviral CD8+ T cell response, the factors regulating memory T cell homeostasis and survival are not well understood. In this article, we show that the Runt-related transcription factor Runx2 is important for long-term memory CD8+ T cell persistence following acute lymphocytic choriomeningitis virus-Armstrong infection in mice. Loss of Runx2 in T cells led to a reduction in KLRG1lo CD127hi memory precursor cell numbers with no effect on KLRG1hi CD127lo terminal effector cell populations. Runx2 expression levels were transcriptionally regulated by TCR signal strength via IRF4, TLR4/7, and selected cytokines. These data demonstrate a CD8+ T cell–intrinsic role for Runx2 in the long-term maintenance of antiviral memory CD8+ T cell populations.
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Affiliation(s)
- Elizabeth Olesin
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Ribhu Nayar
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Priya Saikumar-Lakshmi
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Leslie J Berg
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
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165
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Lack of Sprouty 1 and 2 enhances survival of effector CD8 + T cells and yields more protective memory cells. Proc Natl Acad Sci U S A 2018; 115:E8939-E8947. [PMID: 30126987 DOI: 10.1073/pnas.1808320115] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Identifying novel pathways that promote robust function and longevity of cytotoxic T cells has promising potential for immunotherapeutic strategies to combat cancer and chronic infections. We show that sprouty 1 and 2 (Spry1/2) molecules regulate the survival and function of memory CD8+ T cells. Spry1/2 double-knockout (DKO) ovalbumin (OVA)-specific CD8+ T cells (OT-I cells) mounted more vigorous autoimmune diabetes than WT OT-I cells when transferred to mice expressing OVA in their pancreatic β-islets. To determine the consequence of Spry1/2 deletion on effector and memory CD8+ T cell development and function, we used systemic infection with lymphocytic choriomeningitis virus (LCMV) Armstrong. Spry1/2 DKO LCMV gp33-specific P14 CD8+ T cells survive contraction better than WT cells and generate significantly more polyfunctional memory T cells. The larger number of Spry1/2 DKO memory T cells displayed enhanced infiltration into infected tissue, demonstrating that absence of Spry1/2 can result in increased recall capacity. Upon adoptive transfer into naive hosts, Spry1/2 DKO memory T cells controlled Listeria monocytogenes infection better than WT cells. The enhanced formation of more functional Spry1/2 DKO memory T cells was associated with significantly reduced mTORC1 activity and glucose uptake. Reduced p-AKT, p-FoxO1/3a, and T-bet expression was also consistent with enhanced survival and memory accrual. Collectively, loss of Spry1/2 enhances the survival of effector CD8+ T cells and results in the formation of more protective memory cells. Deleting Spry1/2 in antigen-specific CD8+ T cells may have therapeutic potential for enhancing the survival and functionality of effector and memory CD8+ T cells in vivo.
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166
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Hu Z, Zou Q, Su B. Regulation of T cell immunity by cellular metabolism. Front Med 2018; 12:463-472. [PMID: 30112717 DOI: 10.1007/s11684-018-0668-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 07/17/2018] [Indexed: 12/14/2022]
Abstract
T cells are an important adaptive immune response arm that mediates cell-mediated immunity. T cell metabolism plays a central role in T cell activation, proliferation, differentiation, and effector function. Specific metabolic programs are tightly controlled to mediate T cell immune responses, and alterations in T cell metabolism may result in many immunological disorders. In this review, we will summarize the main T cell metabolic pathways and the important factors participating in T cell metabolic programming during T cell homeostasis, differentiation, and function.
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Affiliation(s)
- Zhilin Hu
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China
| | - Qiang Zou
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
| | - Bing Su
- Shanghai Institute of Immunology, Department of Immunology and Microbiology, Key Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of Education, Shanghai Jiao Tong University School of Medicine, Shanghai, 200025, China.
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167
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Singh MD, Ni M, Sullivan JM, Hamerman JA, Campbell DJ. B cell adaptor for PI3-kinase (BCAP) modulates CD8 + effector and memory T cell differentiation. J Exp Med 2018; 215:2429-2443. [PMID: 30093532 PMCID: PMC6122975 DOI: 10.1084/jem.20171820] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 04/13/2018] [Accepted: 07/23/2018] [Indexed: 12/13/2022] Open
Abstract
Singh et al. show that expression of B cell adaptor for PI3-kinase (BCAP) is induced upon T cell activation and that this helps control effector and memory CD8+ T cell differentiation. CD8+ T cells respond to signals via the T cell receptor (TCR), costimulatory molecules, and immunoregulatory cytokines by developing into diverse populations of effector and memory cells. The relative strength of phosphoinositide 3-kinase (PI3K) signaling early in the T cell response can dramatically influence downstream effector and memory T cell differentiation. We show that initial PI3K signaling during T cell activation results in up-regulation of the signaling scaffold B cell adaptor for PI3K (BCAP), which further potentiates PI3K signaling and promotes the accumulation of CD8+ T cells with a terminally differentiated effector phenotype. Accordingly, BCAP-deficient CD8+ T cells have attenuated clonal expansion and altered effector and memory T cell development following infection with Listeria monocytogenes. Thus, induction of BCAP serves as a positive feedback circuit to enhance PI3K signaling in activated CD8+ T cells, thereby acting as a molecular checkpoint regulating effector and memory T cell development.
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Affiliation(s)
- Mark D Singh
- Immunology Program, Benaroya Research Institute, Seattle, WA
| | - Minjian Ni
- Immunology Program, Benaroya Research Institute, Seattle, WA
| | - Jenna M Sullivan
- Immunology Program, Benaroya Research Institute, Seattle, WA.,Department of Immunology, University of Washington School of Medicine, Seattle, WA
| | - Jessica A Hamerman
- Immunology Program, Benaroya Research Institute, Seattle, WA.,Department of Immunology, University of Washington School of Medicine, Seattle, WA
| | - Daniel J Campbell
- Immunology Program, Benaroya Research Institute, Seattle, WA .,Department of Immunology, University of Washington School of Medicine, Seattle, WA
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168
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Headen DM, Woodward KB, Coronel MM, Shrestha P, Weaver JD, Zhao H, Tan M, Hunckler MD, Bowen WS, Johnson CT, Shea L, Yolcu ES, García AJ, Shirwan H. Local immunomodulation Fas ligand-engineered biomaterials achieves allogeneic islet graft acceptance. NATURE MATERIALS 2018; 17:732-739. [PMID: 29867165 PMCID: PMC6060019 DOI: 10.1038/s41563-018-0099-0] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Accepted: 04/18/2018] [Indexed: 05/17/2023]
Abstract
Islet transplantation is a promising therapy for type 1 diabetes. However, chronic immunosuppression to control rejection of allogeneic islets induces morbidities and impairs islet function. T effector cells are responsible for islet allograft rejection and express Fas death receptors following activation, becoming sensitive to Fas-mediated apoptosis. Here, we report that localized immunomodulation using microgels presenting an apoptotic form of the Fas ligand with streptavidin (SA-FasL) results in prolonged survival of allogeneic islet grafts in diabetic mice. A short course of rapamycin treatment boosted the immunomodulatory efficacy of SA-FasL microgels, resulting in acceptance and function of allografts over 200 days. Survivors generated normal systemic responses to donor antigens, implying immune privilege of the graft, and had increased CD4+CD25+FoxP3+ T regulatory cells in the graft and draining lymph nodes. Deletion of T regulatory cells resulted in acute rejection of established islet allografts. This localized immunomodulatory biomaterial-enabled approach may provide an alternative to chronic immunosuppression for clinical islet transplantation.
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Affiliation(s)
- Devon M Headen
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Kyle B Woodward
- Institute for Cellular Therapeutics, University of Louisville, Louisville, KY, USA
- Department of Microbiology and Immunology, University of Louisville, Louisville, KY, USA
| | - María M Coronel
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Pradeep Shrestha
- Institute for Cellular Therapeutics, University of Louisville, Louisville, KY, USA
- Department of Microbiology and Immunology, University of Louisville, Louisville, KY, USA
| | - Jessica D Weaver
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - Hong Zhao
- Institute for Cellular Therapeutics, University of Louisville, Louisville, KY, USA
| | - Min Tan
- Institute for Cellular Therapeutics, University of Louisville, Louisville, KY, USA
| | - Michael D Hunckler
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
| | - William S Bowen
- Institute for Cellular Therapeutics, University of Louisville, Louisville, KY, USA
| | - Christopher T Johnson
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA
- Department of Microbiology and Immunology, University of Louisville, Louisville, KY, USA
| | - Lonnie Shea
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
- Department of Biomedical Engineering, Georgia Institute of Technology, Atlanta, GA, USA
| | - Esma S Yolcu
- Institute for Cellular Therapeutics, University of Louisville, Louisville, KY, USA
- Department of Microbiology and Immunology, University of Louisville, Louisville, KY, USA
| | - Andrés J García
- Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
- Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA.
| | - Haval Shirwan
- Institute for Cellular Therapeutics, University of Louisville, Louisville, KY, USA.
- Department of Microbiology and Immunology, University of Louisville, Louisville, KY, USA.
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169
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Enamorado M, Khouili SC, Iborra S, Sancho D. Genealogy, Dendritic Cell Priming, and Differentiation of Tissue-Resident Memory CD8 + T Cells. Front Immunol 2018; 9:1751. [PMID: 30108585 PMCID: PMC6079237 DOI: 10.3389/fimmu.2018.01751] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/16/2018] [Indexed: 11/13/2022] Open
Abstract
Tissue-resident memory CD8+ T (Trm) cells define a distinct non-recirculating subset. Trm cells constitute a first line of defense against local infections in barrier tissues, but they are also found in non-barrier tissues and play a role in antitumor immunity. Their differentiation in tissues and their phenotypical, transcriptional, and functional characteristics are the object of active research. Herein, we will discuss the potential existence of committed CD8+ Trm precursors and the genealogy of memory CD8+ T cell subsets. In addition to the priming of naive T cells, there is some plasticity of antigen-experienced effector and memory T cell subsets to generate Trm precursors. Local inflammation, antigen presentation, and cytokines drive Trm differentiation. It is of prime interest how specific dendritic cell subsets modulate priming and differentiation of Trm cells, as well as their reactivation within tissues. Research on how we can manipulate generation of memory T cells subsets is key for improved vaccination strategies.
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Affiliation(s)
- Michel Enamorado
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Sofía C Khouili
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
| | - Salvador Iborra
- Department of Immunology, School of Medicine, Universidad Complutense de Madrid, 12 de Octubre Health Research Institute (imas12), Madrid, Spain
| | - David Sancho
- Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain
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170
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Immunometabolism of T cells and NK cells: metabolic control of effector and regulatory function. Inflamm Res 2018; 67:813-828. [PMID: 30066126 DOI: 10.1007/s00011-018-1174-3] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Revised: 07/24/2018] [Accepted: 07/26/2018] [Indexed: 01/10/2023] Open
Abstract
Metabolic flux can dictate cell fate, including immune cell effector and regulatory function. The metabolic regulation of cell function is well characterized with respect to effector, memory, and regulatory T cells. This knowledge may allow for manipulation of T cell metabolic pathways that set the stage for more effective T cell therapy. Natural Killer (NK) and T-lymphocytes have complementary roles in the defense against pathogens. However, studies of NK cell metabolism are only beginning to emerge and there is comparatively little knowledge on the metabolic regulation of NK-cell activation and effector function. Given their common lymphoid lineage, effector functions and cellular memory potential our current knowledge on T cell metabolism could inform investigation of metabolic reprogramming in NK cells. In this review, we compare the current knowledge of metabolic regulation in T cell and NK cell development, activation, effector and memory function. Commonalties in glucose transport, hypoxia-inducible factors and mTOR highlight metabolic control points in both cells types. Contrasting the glycolytic and oxidative nodes of metabolic regulation in T cells versus NK cells may provide insight into the contribution of specific immune responses to disease and promote the development of immunotherapeutic approaches targeting both innate and adaptive immune responses.
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171
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Jung JW, Veitch M, Bridge JA, Overgaard NH, Cruz JL, Linedale R, Franklin ME, Saunders NA, Simpson F, Frazer IH, Steptoe RJ, Wells JW. Clinically-Relevant Rapamycin Treatment Regimens Enhance CD8 + Effector Memory T Cell Function In The Skin and Allow their Infiltration into Cutaneous Squamous Cell Carcinoma. Oncoimmunology 2018; 7:e1479627. [PMID: 30228949 DOI: 10.1080/2162402x.2018.1479627] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 05/15/2018] [Accepted: 05/16/2018] [Indexed: 10/28/2022] Open
Abstract
Patients receiving immunosuppressive drugs to prevent organ transplant rejection exhibit a greatly increased risk of developing cutaneous squamous cell carcinoma (SCC). However, not all immunosuppressive drugs confer the same risk. Randomised, controlled trials demonstrate that switching renal transplant recipients receiving calcineurin inhibitor-based therapies to mammalian target of rapamycin (mTOR) inhibitors results in a reduced incidence of de novo SSC formation, and can even result in the regression of pre-existing premalignant lesions. However, the contribution played by residual immune function in this setting is unclear. We examined the hypotheses that mTOR inhibitors promote the enhanced differentiation and function of CD8+ memory T cells in the skin. Here, we demonstrate that the long-term oral administration of rapamycin to achieve clinically-relevant whole blood drug target thresholds, creates a "low rapamycin dose" environment in the skin. While both rapamycin and the calcineurin inhibitor tacrolimus elongated the survival of OVA-expressing skin grafts, and inhibited short-term antigen-specific CD8+ T cell responses, rapamycin but not tacrolimus permitted the statistically significant infiltration of CD8+ effector memory T cells into UV-induced SCC lesions. Furthermore, rapamycin uniquely enhanced the number and function of CD8+ effector and central memory T cells in a model of long-term contact hypersensitivity provided that rapamycin was present during the antigen sensitization phase. Thus, our findings suggest that patients switched to mTOR inhibitor regimens likely experience enhanced CD8+ memory T cell function to new antigen-challenges in their skin, which could contribute to their lower risk of de novo SSC formation and regression of pre-existing premalignant lesions.
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Affiliation(s)
- Ji-Won Jung
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia
| | - Margaret Veitch
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia
| | - Jennifer A Bridge
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia
| | - Nana H Overgaard
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia.,Division of Immunology & Vaccinology, National Veterinary Institute, Technical University of Denmark, Lyngby, Denmark
| | - Jazmina L Cruz
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia
| | - Richard Linedale
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia
| | - Michael E Franklin
- Department of Clinical Pharmacology, Princess Alexandra Hospital, Queensland Health, Brisbane, QLD, Australia
| | - Nicholas A Saunders
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia
| | - Fiona Simpson
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia
| | - Ian H Frazer
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia
| | - Raymond J Steptoe
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia
| | - James W Wells
- The University of Queensland Diamantina Institute, Translational Research Institute, Brisbane, QLD Australia
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172
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Gaber T, Chen Y, Krauß PL, Buttgereit F. Metabolism of T Lymphocytes in Health and Disease. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2018; 342:95-148. [PMID: 30635095 DOI: 10.1016/bs.ircmb.2018.06.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Adaptive immune responses that occur in infection, cancer, and autoimmune as well as allergic diseases involve the participation of T cells. T cells travel throughout the body searching for antigens, which are recognized via the major histocompatibility complexes. In the healthy organism, these T cells maintain metabolic quiescence until they encounter a potentially cognate antigen. Once activated, e.g., during an infection or tissue damage, T cells switch their metabolic program to gain energy and building blocks to maintain cellular homeostasis and to fulfill their specific immune functions involving clonal expansion and/or differentiation into effector and memory T cells to ultimately ensure host survival. Thus, differences in metabolism in healthy and pathogenic T cells provide an explanation for dysfunctionality of T-cell responses in metabolic disorders, autoimmunity, and cancer. Here, we summarize current knowledge on T-cell metabolism during the maintenance of homeostasis, activation, and differentiation as well as over the course of time that memory is generated in health and in diseased states such as autoimmunity and cancer.
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Affiliation(s)
- Timo Gaber
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Department of Rheumatology and Clinical Immunology, Berlin, Germany; German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany
| | - Yuling Chen
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Department of Rheumatology and Clinical Immunology, Berlin, Germany; German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany
| | - Pierre-Louis Krauß
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Department of Rheumatology and Clinical Immunology, Berlin, Germany; German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany
| | - Frank Buttgereit
- Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, Berlin Institute of Health, Department of Rheumatology and Clinical Immunology, Berlin, Germany; German Rheumatism Research Centre (DRFZ) Berlin, a Leibniz Institute, Berlin, Germany
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173
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Miyakoda M, Honma K, Kimura D, Akbari M, Kimura K, Matsuyama T, Yui K. Differential requirements for IRF4 in the clonal expansion and homeostatic proliferation of naive and memory murine CD8 + T cells. Eur J Immunol 2018; 48:1319-1328. [PMID: 29745988 DOI: 10.1002/eji.201747120] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 04/04/2018] [Accepted: 05/07/2018] [Indexed: 12/19/2022]
Abstract
Interferon regulatory factor 4 (IRF4) has critical roles in immune cell differentiation and function and is indispensable for clonal expansion and effector function in T cells. Here, we demonstrate that the AKT pathway is impaired in murine CD8+ T cells lacking IRF4. The expression of phosphatase and tensin homolog (PTEN), a negative regulator of the AKT pathway, was elevated in Irf4-/- CD8+ T cells. Inhibition of PTEN partially rescued downstream events, suggesting that PTEN constitutes a checkpoint in the IRF4-mediated regulation of cell signaling. Despite the clonal expansion defect, in the absence of IRF4, memory-like CD8+ T cells could be generated and maintained, although unable to expand in recall responses. The homeostatic proliferation of naïve Irf4-/- CD8+ T cells was impaired, whereas their number eventually reached a level similar to that of wild-type CD8+ T cells. Conversely, memory-like Irf4-/- CD8+ T cells underwent homeostatic proliferation in a manner similar to that of wild-type memory CD8+ T cells. These results suggest that IRF4 regulates the clonal expansion of CD8+ T cells at least in part via the AKT signaling pathway. Moreover, IRF4 regulates the homeostatic proliferation of naïve CD8+ T cells, whereas the maintenance of memory CD8+ T cells is IRF4-independent.
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Affiliation(s)
- Mana Miyakoda
- Division of Immunology, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University
| | - Kiri Honma
- Division of Immunology, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University
| | - Daisuke Kimura
- Division of Immunology, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University
| | - Masoud Akbari
- Division of Immunology, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University
| | - Kazumi Kimura
- Division of Immunology, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University
| | - Toshifumi Matsuyama
- Division of Cytokine Signaling, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University
| | - Katsuyuki Yui
- Division of Immunology, Department of Molecular Microbiology and Immunology, Graduate School of Biomedical Sciences, Nagasaki University
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174
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Fox A, Harland KL, Kedzierska K, Kelso A. Exposure of Human CD8 + T Cells to Type-2 Cytokines Impairs Division and Differentiation and Induces Limited Polarization. Front Immunol 2018; 9:1141. [PMID: 29892290 PMCID: PMC5985406 DOI: 10.3389/fimmu.2018.01141] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 05/07/2018] [Indexed: 12/18/2022] Open
Abstract
Effector CD8+ T cells generally produce type-1 cytokines and mediators of the perforin/granzyme cytolytic pathway, yet type-2-polarized CD8+ cells (Tc2) are detected in type-2 (T2) cytokine-driven diseases such as asthma. It is unclear whether T2 cytokine exposure during activation is sufficient to polarize human CD8+ T cells. To address this question, a protocol was developed for high-efficiency activation of human CD8+ T cells in which purified single cells or populations were stimulated with plate-bound anti-CD3 and anti-CD11a mAb for up to 8 days in T2 polarizing or neutral conditions, before functional analysis. Activation of CD8+ naïve T cells (TN) in T2 compared with neutral conditions decreased the size of single-cell clones, although early division kinetics were equivalent, indicating an effect on overall division number. Activation of TN in T2 conditions followed by brief anti-CD3 mAb restimulation favored expression of T2 cytokines, GATA3 and Eomes, and lowered expression of type-1 cytokines, Prf1, Gzmb, T-BET, and Prdm1. However, IL-4 was only weakly expressed, and PMA and ionomycin restimulation favored IFN-γ over IL-4 expression. Activation of TN in T2 compared with neutral conditions prevented downregulation of costimulatory (CD27, CD28) and lymph-node homing receptors (CCR7) and CD95 acquisition, which typically occur during differentiation into effector phenotypes. CD3 was rapidly and substantially induced after activation in neutral, but not T2 conditions, potentially contributing to greater division and differentiation in neutral conditions. CD8+ central memory T cells (TCM) were less able to enter division upon reactivation in T2 compared with neutral conditions, and were more refractory to modulating IFN-γ and IL-4 production than CD8+ TN. In summary, while activation of TN in T2 conditions can generate T2 cytokine-biased cells, IL-4 expression is weak, T2 bias is lost upon strong restimulation, differentiation, and division are arrested, and reactivation of TCM is reduced in T2 conditions. Taken together, this suggests that exposure to T2 cytokines during activation may not be sufficient to generate and retain human Tc2 cells.
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Affiliation(s)
- Annette Fox
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, VIC, Australia
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175
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Ban YH, Oh SC, Seo SH, Kim SM, Choi IP, Greenberg PD, Chang J, Kim TD, Ha SJ. miR-150-Mediated Foxo1 Regulation Programs CD8 + T Cell Differentiation. Cell Rep 2018; 20:2598-2611. [PMID: 28903041 DOI: 10.1016/j.celrep.2017.08.065] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Revised: 06/30/2017] [Accepted: 08/21/2017] [Indexed: 01/01/2023] Open
Abstract
MicroRNA (miR)-150 is a developmental regulator of several immune-cell types, but its role in CD8+ T cells is largely unexplored. Here, we show that miR-150 regulates the generation of memory CD8+ T cells. After acute virus infection, miR-150 knockout (KO) mice exhibited an accelerated differentiation of CD8+ T cells into memory cells and improved production of effector cytokines. Additionally, miR-150 KO CD8+ T cells displayed an enhanced recall response and improved protection against infections with another virus and bacteria. We found that forkhead box O1 (Foxo1) and T cell-specific transcription factor 1 (TCF1) are upregulated during the early activation phase in miR-150 KO CD8+ T cells and that miR-150 directly targets and suppresses Foxo1. These results suggest that miR-150-mediated suppression of Foxo1 regulates the balance between effector and memory cell differentiation, which might aid in the development of improved vaccines and T cell therapeutics.
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Affiliation(s)
- Young Ho Ban
- Department of Biochemistry, College of Life Science & Biotechnology, Yonsei University, Seoul 03722, Korea
| | - Se-Chan Oh
- Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, Korea
| | - Sang-Hwan Seo
- Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea
| | - Seok-Min Kim
- Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, Korea
| | - In-Pyo Choi
- Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, Korea
| | - Philip D Greenberg
- Fred Hutchinson Cancer Research Center, University of Washington, Seattle, WA 98195, USA
| | - Jun Chang
- Division of Life & Pharmaceutical Sciences, Center for Cell Signaling & Drug Discovery Research, Ewha Womans University, Seoul 03760, Korea
| | - Tae-Don Kim
- Immunotherapy Convergence Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; Department of Functional Genomics, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon, Korea.
| | - Sang-Jun Ha
- Department of Biochemistry, College of Life Science & Biotechnology, Yonsei University, Seoul 03722, Korea.
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176
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Christopoulos P, Engel-Riedel W, Grohé C, Kropf-Sanchen C, von Pawel J, Gütz S, Kollmeier J, Eberhardt W, Ukena D, Baum V, Nimmrich I, Sieder C, Schnabel PA, Serke M, Thomas M. Everolimus with paclitaxel and carboplatin as first-line treatment for metastatic large-cell neuroendocrine lung carcinoma: a multicenter phase II trial. Ann Oncol 2018; 28:1898-1902. [PMID: 28535181 DOI: 10.1093/annonc/mdx268] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Background Large-cell neuroendocrine carcinoma of the lung (LCNEC) is a rare disease with poor prognosis and limited treatment options. Neuroendocrine tumors frequently show overactivation of the mTOR pathway. Based on the good activity of the mTOR inhibitor everolimus in different types of neuroendocrine tumors and the results of a previous phase I trial, we evaluated the efficacy and safety of everolimus in combination with carboplatin and paclitaxel as upfront treatment for patients with advanced LCNEC. Patients and methods In this prospective, multicenter phase II trial chemotherapy-naive patients with stage IV LCNEC received 5 mg everolimus daily combined with paclitaxel 175 mg/m2 and carboplatin AUC 5 every 3 weeks for a maximum of four cycles followed by maintenance everolimus 5 mg daily until progression. Efficacy parameters were determined based on central radiologic assessment. Results Forty-nine patients with a mean age of 62 ±9 years and a predominance of male (71%) smokers (98%) were enrolled in 10 German centers. The overall response rate was 45% (95% confidence interval [CI] 31%-60%), the disease control rate 74% (CI 59%-85%), the median progression-free survival 4.4 (CI 3.2-6) months and the median overall survival 9.9 (CI 6.9-11.7) months. The progression-free survival rate at 3 months (primary end point) was 76% (CI 64%-88%) according to Kaplan-Meier. Grade-3/4 toxicities occurred in 51% of patients and mainly consisted of general physical health deterioration (8%), cytopenias (24%), infections (10%) and gastrointestinal problems (8%). Typical everolimus-related adverse events, like stomatitis, rash and ocular problems occurred only in a minority of patients (<15%) and were exclusively of grade 1-2. Conclusion Everolimus in combination with carboplatin and paclitaxel is an effective and well-tolerated first-line treatment for patients with metastatic LCNEC. Registered clinical trial numbers EudraCT number 2010-022273-34, NCT01317615.
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Affiliation(s)
- P Christopoulos
- Department of Thoracic Oncology, Thoraxklinik at Heidelberg University Hospital, Translational Lung Research Center Heidelberg (TLRC-H), Heidelberg, Member of the German Center for Lung Research (DZL)
| | - W Engel-Riedel
- Department of Pneumology, Lung Hospital Cologne Merheim, City of Cologne Municipal Hospitals, Cologne
| | - C Grohé
- Department of Pneumology, Protestant Lung Hospital, Berlin
| | - C Kropf-Sanchen
- Department of Internal Medicine II, University Hospital Ulm, Ulm
| | - J von Pawel
- Department of Pneumology, Asklepios Hospital Munich-Gauting
| | - S Gütz
- Department of Pneumology and Cardiology, Lutheran Deaconess' Hospital, Leipzig
| | - J Kollmeier
- Department of Pneumology, HELIOS Hospital Emil von Behring, Berlin
| | - W Eberhardt
- Department of Medical Oncology (Cancer Research), Ruhrlandclinic, University Hospital, Essen
| | - D Ukena
- Department of Pneumology and Respiratory Medicine, Hospital Bremen-Ost, Bremen
| | - V Baum
- Business Unit Oncology, Novartis Pharma GmbH, Nürnberg
| | - I Nimmrich
- Business Unit Oncology, Novartis Pharma GmbH, Nürnberg
| | - C Sieder
- Business Unit Oncology, Novartis Pharma GmbH, Nürnberg
| | - P A Schnabel
- Department of Pathology, University Medical Center Saarland, Homburg
| | - M Serke
- Department of Pneumology, Lung Hospital Hemer, Germany
| | - M Thomas
- Department of Thoracic Oncology, Thoraxklinik at Heidelberg University Hospital, Translational Lung Research Center Heidelberg (TLRC-H), Heidelberg, Member of the German Center for Lung Research (DZL)
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177
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Wang H, Xiao Y, Su L, Cui N, Liu D. mTOR Modulates CD8+ T Cell Differentiation in Mice with Invasive Pulmonary Aspergillosis. Open Life Sci 2018; 13:129-136. [PMID: 33817078 PMCID: PMC7874697 DOI: 10.1515/biol-2018-0018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 02/13/2018] [Indexed: 11/24/2022] Open
Abstract
CD8+ T cells are a vital component of the adaptive immune system and important for eliminating intracellular pathogens. Notably, mTOR activity is associated with CD8+ T effector memory (Tem) cell differentiation in fungal infections. This study investigates the molecular mechanisms of CD8+ Tem cell proliferation and differentiation mediated by the mTOR pathway in immunosuppressed mice with invasive pulmonary aspergillosis (IPA). We first established the immunosuppressed IPA mouse model, then mice were subjected to rapamycin treatment daily or interleukin (IL)-12 treatment every other day. Lung tissues and blood samples were obtained seven days later. Aspergillus fumigatus was cultured from the lung tissue of mice inoculated with A. fumigatus spores. After IL-12 treatment, the expression of mTOR and its downstream signaling molecule S6 kinase, number of CD8+ Tem cells and interferon-γ expression were significantly increased, while they were significantly decreased after treatment with rapamycin. Additionally, IL-12 treatment induced T-bet but inhibited Eomesodermin expression, while the opposite was seen when the mTOR pathway was blocked by rapamycin. In conclusion, we found that the mTOR pathway induced CD8+ T cell proliferation and differentiation by regulating T-bet and Eomesodermin expression, which significantly influenced immune regulation during IPA and enhanced the immune response against fungal infection.
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Affiliation(s)
- Hao Wang
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Yu Xiao
- Department of Pathology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Longxiang Su
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Na Cui
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
| | - Dawei Liu
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Science, Beijing, China
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178
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Monteiro A, Cruto C, Rosado P, Martinho A, Rosado L, Fonseca M, Paiva A. Characterization of circulating gamma-delta T cells in relapsing vs remission multiple sclerosis. J Neuroimmunol 2018; 318:65-71. [DOI: 10.1016/j.jneuroim.2018.02.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/14/2018] [Accepted: 02/14/2018] [Indexed: 12/23/2022]
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179
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Abstract
Memory cytotoxic T lymphocytes (CTLs) are able to provide protections to the host against repeated insults from intracellular pathogens. However, it has not been completely understood how the effector functions of memory CTLs are induced upon antigen challenge, which is directly related to the efficacy of their protection. Third signal cytokines, such as IL-12 and type I interferon, have been suggested to be involved in the protective function of memory CTLs, but direct evidence is warranted. In this report, we found that memory CTLs need to be reactivated to exert effector functions. Infusion of a large population of quiescent memory CTLs did not lead to cancer control in tumor-bearing mice, whereas infusion of a reactivated memory CTL population did. This reactivation of memory CTLs requires cytokines such as IL-12 in addition to antigen but was less dependent upon costimulation and IL-2 compared to naive CTLs. Memory CTLs responded more quickly and with greater strength than their naive counterparts upon stimulation, which is associated with higher upregulation of important transcription factors such as T-bet and phosphorylated STAT4. In addition, memory CTLs underwent less expansion than naive CTLs upon pathogen challenge. In conclusion, effector functions of established memory CTLs may be affected by certain cytokines such as IL-12 and type I IFN. Thus, a pathogen's ability to induce cytokines could contribute to the efficacy of protection of an established memory CTL population.
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180
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Wang Z, Valera JC, Zhao X, Chen Q, Gutkind JS. mTOR co-targeting strategies for head and neck cancer therapy. Cancer Metastasis Rev 2018; 36:491-502. [PMID: 28822012 PMCID: PMC5613059 DOI: 10.1007/s10555-017-9688-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Head and neck squamous cell carcinoma (HNSCC) is the sixth most common malignancy worldwide. There is an urgent need to develop effective therapeutic approaches to prevent and treat HNSCC. Recent deep sequencing of the HNSCC genomic landscape revealed a multiplicity and diversity of genetic alterations in this malignancy. Although a large variety of specific molecules were found altered in each individual tumor, they all participate in only a handful of driver signaling pathways. Among them, the PI3K/mTOR pathway is the most frequently activated, which plays a central role in cancer initiation and progression. In turn, targeting of mTOR may represent a precision therapeutic approach for HNSCC. Indeed, mTOR inhibition exerts potent anti-tumor activity in HNSCC experimental systems, and mTOR targeting clinical trials show encouraging results. However, advanced HNSCC patients may exhibit unpredictable drug resistance, and the analysis of its molecular basis suggests that co-targeting strategies may provide a more effective option. In addition, although counterintuitive, emerging evidence suggests that mTOR inhibition may enhance the anti-tumor immune response. These new findings raise the possibility that the combination of mTOR inhibitors and immune oncology agents may provide novel precision therapeutic options for HNSCC.
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Affiliation(s)
- Zhiyong Wang
- Moores Cancer Center, University of California San Diego, La Jolla, CA, USA.,State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases,West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China
| | | | - Xuefeng Zhao
- Moores Cancer Center, University of California San Diego, La Jolla, CA, USA.,State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases,West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China
| | - Qianming Chen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases,West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan, 610041, China.
| | - J Silvio Gutkind
- Moores Cancer Center, University of California San Diego, La Jolla, CA, USA.
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181
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Large cell neuroendocrine lung carcinoma induces peripheral T-cell repertoire alterations with predictive and prognostic significance. Lung Cancer 2018; 119:48-55. [PMID: 29656752 DOI: 10.1016/j.lungcan.2018.03.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 02/05/2018] [Accepted: 03/01/2018] [Indexed: 12/13/2022]
Abstract
OBJECTIVES This study was performed to evaluate for a potentially important role of T cells in the pathophysiology and treatment sensitivity of large cell neuroendocrine lung carcinoma (LCNEC), an orphan disease with poor prognosis and scarce data to guide novel therapeutic strategies. MATERIALS AND METHODS We performed T-cell receptor (TCR) β-chain spectratyping on blood samples of patients treated within the CRAD001KDE37 trial (n = 35) using age-matched current or former (n = 11) and never smokers (n = 10) as controls. The data were analyzed in conjunction with the complete blood counts of the probands as well as the data about response to treatment and overall survival in the clinical trial. RESULTS AND CONCLUSION Untreated stage IV LCNEC patients had significant T-cell repertoire alterations (p < 0.001) compared to age-matched smokers. These changes correlated positively with blood lymphocyte counts (r = 0.49, p < 0.01), suggesting antigen-induced T-cell proliferation as the causative mechanism. At the same time, LCNEC patients showed mild lymphopenia (1.54 vs. 2.51/nl in median, p < 0.01), which reveals a second, antigen-independent mechanism of systemic immune dysregulation. More pronounced T-cell repertoire alterations and higher blood lymphocyte counts at diagnosis were associated with a better treatment response by RECIST and with a longer overall survival (441 vs. 157 days in median, p = 0.019). A higher degree of T-cell repertoire normalization after 3 months of therapy also distinguished a patient group with more favourable prognosis (median overall survival 617 vs. 316 days, p = 0.036) independent of radiological response. Thus, LCNEC induces clinically relevant changes of the T-cell repertoire, which are measurable in the blood and could be exploited for prognostic, predictive and therapeutic purposes. Their pathogenesis appears to involve antigen-induced oligoclonal T-cell expansions superimposed on TCR-independent lymphopenia.
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182
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Chemin K, Ramsköld D, Diaz-Gallo LM, Herrath J, Houtman M, Tandre K, Rönnblom L, Catrina A, Malmström V. EOMES-positive CD4 + T cells are increased in PTPN22 (1858T) risk allele carriers. Eur J Immunol 2018; 48:655-669. [PMID: 29388193 DOI: 10.1002/eji.201747296] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 12/20/2017] [Accepted: 01/19/2018] [Indexed: 12/18/2022]
Abstract
The presence of the PTPN22 risk allele (1858T) is associated with several autoimmune diseases including rheumatoid arthritis (RA). Despite a number of studies exploring the function of PTPN22 in T cells, the exact impact of the PTPN22 risk allele on T-cell function in humans is still unclear. In this study, using RNA sequencing, we show that, upon TCR-activation, naïve human CD4+ T cells homozygous for the PTPN22 risk allele overexpress a set of genes including CFLAR and 4-1BB, which are important for cytotoxic T-cell differentiation. Moreover, the protein expression of the T-box transcription factor Eomesodermin (EOMES) was increased in T cells from healthy donors homozygous for the PTPN22 risk allele and correlated with a decreased number of naïve CD4+ T cells. There was no difference in the frequency of other CD4+ T-cell subsets (Th1, Th17, Tfh, Treg). Finally, an accumulation of EOMES+ CD4+ T cells was observed in synovial fluid of RA patients with a more pronounced production of Perforin-1 in PTPN22 risk allele carriers. Altogether, we propose a novel mechanism of action of PTPN22 risk allele through the generation of cytotoxic CD4+ T cells and identify EOMES+ CD4+ T cells as a relevant T-cell subset in RA pathogenesis.
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Affiliation(s)
- Karine Chemin
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital Solna, Karolinska Institute, Stockholm, Sweden
| | - Daniel Ramsköld
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital Solna, Karolinska Institute, Stockholm, Sweden
| | - Lina-Marcela Diaz-Gallo
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital Solna, Karolinska Institute, Stockholm, Sweden
| | - Jessica Herrath
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital Solna, Karolinska Institute, Stockholm, Sweden
| | - Miranda Houtman
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital Solna, Karolinska Institute, Stockholm, Sweden
| | - Karolina Tandre
- Department of Medical Sciences, Rheumatology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Lars Rönnblom
- Department of Medical Sciences, Rheumatology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Anca Catrina
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital Solna, Karolinska Institute, Stockholm, Sweden
| | - Vivianne Malmström
- Rheumatology Unit, Department of Medicine, Karolinska University Hospital Solna, Karolinska Institute, Stockholm, Sweden
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183
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Zhang J, Marotel M, Fauteux-Daniel S, Mathieu AL, Viel S, Marçais A, Walzer T. T-bet and Eomes govern differentiation and function of mouse and human NK cells and ILC1. Eur J Immunol 2018; 48:738-750. [PMID: 29424438 DOI: 10.1002/eji.201747299] [Citation(s) in RCA: 113] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 12/14/2017] [Accepted: 02/06/2018] [Indexed: 11/08/2022]
Abstract
T-bet and Eomes are T-box transcription factors that drive the differentiation and function of cytotoxic lymphocytes such as NK cells. Their DNA-binding domains are highly similar, suggesting redundant transcriptional activity. However, while these transcription factors have different patterns of expression, the phenotype of loss-of-function mouse models suggests that they play distinct roles in the development of NK cells and other innate lymphoid cells (ILCs). Recent technological advances using reporter mice and conditional knockouts were fundamental in defining the regulation and function of these factors at steady state and during pathological conditions such as various types of cancer or infection. Here, we review these recent developments, focusing on NK cells as prototypical cytotoxic lymphocytes and their development, and also discuss parallels between NK cells and T cells. We also examine the role of T-bet and Eomes in human NK cells and ILC1s. Considering divergent findings on mouse and human ILC1s, we propose that NK cells are defined by coexpression of T-bet and Eomes, while ILC1s express only one of these factors, either T-bet or Eomes, depending on the tissue or the species.
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Affiliation(s)
- Jiang Zhang
- CIRI, Centre International de Recherche en Infectiologie-International Center for Infectiology Research, Inserm, U1111, Ecole Normale Supérieure de Lyon, Université Lyon 1, CNRS, UMR5308, Lyon, France.,Shanghai Key Laboratory of Regulatory Biology, School of Life Sciences, East China Normal University, Shanghai, China
| | - Marie Marotel
- CIRI, Centre International de Recherche en Infectiologie-International Center for Infectiology Research, Inserm, U1111, Ecole Normale Supérieure de Lyon, Université Lyon 1, CNRS, UMR5308, Lyon, France
| | - Sébastien Fauteux-Daniel
- CIRI, Centre International de Recherche en Infectiologie-International Center for Infectiology Research, Inserm, U1111, Ecole Normale Supérieure de Lyon, Université Lyon 1, CNRS, UMR5308, Lyon, France
| | - Anne-Laure Mathieu
- CIRI, Centre International de Recherche en Infectiologie-International Center for Infectiology Research, Inserm, U1111, Ecole Normale Supérieure de Lyon, Université Lyon 1, CNRS, UMR5308, Lyon, France
| | - Sébastien Viel
- CIRI, Centre International de Recherche en Infectiologie-International Center for Infectiology Research, Inserm, U1111, Ecole Normale Supérieure de Lyon, Université Lyon 1, CNRS, UMR5308, Lyon, France.,Laboratoire d'Immunologie, Centre Hospitalier Lyon Sud, Hospices Civils de Lyon, 69495, Pierre-Bénite, France
| | - Antoine Marçais
- CIRI, Centre International de Recherche en Infectiologie-International Center for Infectiology Research, Inserm, U1111, Ecole Normale Supérieure de Lyon, Université Lyon 1, CNRS, UMR5308, Lyon, France
| | - Thierry Walzer
- CIRI, Centre International de Recherche en Infectiologie-International Center for Infectiology Research, Inserm, U1111, Ecole Normale Supérieure de Lyon, Université Lyon 1, CNRS, UMR5308, Lyon, France
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184
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Cui N, Wang H, Su LX, Zhang JH, Long Y, Liu DW. Role of Triggering Receptor Expressed on Myeloid Cell-1 Expression in Mammalian Target of Rapamycin Modulation of CD8 + T-cell Differentiation during the Immune Response to Invasive Pulmonary Aspergillosis. Chin Med J (Engl) 2018; 130:1211-1217. [PMID: 28485322 PMCID: PMC5443028 DOI: 10.4103/0366-6999.205850] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
Background: Triggering receptor expressed on myeloid cell-1 (TREM-1) may play a vital role in mammalian target of rapamycin (mTOR) modulation of CD8+ T-cell differentiation through the transcription factors T-box expressed in T-cells and eomesodermin during the immune response to invasive pulmonary aspergillosis (IPA). This study aimed to investigate whether the mTOR signaling pathway modulates the proliferation and differentiation of CD8+ T-cells during the immune response to IPA and the role TREM-1 plays in this process. Methods: Cyclophosphamide (CTX) was injected intraperitoneally, and Aspergillus fumigatus spore suspension was inoculated intranasally to establish the immunosuppressed IPA mouse model. After inoculation, rapamycin (2 mg·kg−1·d−1) or interleukin (IL)-12 (5 μg/kg every other day) was given for 7 days. The number of CD8+ effector memory T-cells (Tem), expression of interferon (IFN)-γ, mTOR, and ribosomal protein S6 kinase (S6K), and the levels of IL-6, IL-10, galactomannan (GM), and soluble TREM-1 (sTREM-1) were measured. Results: Viable A. fumigatus was cultured from the lung tissue of the inoculated mice. Histological examination indicated greater inflammation, hemorrhage, and lung tissue injury in both IPA and CTX + IPA mice groups. The expression of mTOR and S6K was significantly increased in the CTX + IPA + IL-12 group compared with the control, IPA (P = 0.01; P = 0.001), and CTX + IPA (P = 0.034; P = 0.032) groups, but significantly decreased in the CTX + IPA + RAPA group (P < 0.001). Compared with the CTX + IPA group, the proportion of Tem, expression of IFN-γ, and the level of sTREM-1 were significantly higher after IL-12 treatment (P = 0.024, P = 0.032, and P = 0.017, respectively), and the opposite results were observed when the mTOR pathway was blocked by rapamycin (P < 0.001). Compared with the CTX + IPA and CTX + IPA + RAPA groups, IL-12 treatment increased IL-6 and downregulated IL-10 as well as GM, which strengthened the immune response to the IPA infection. Conclusions: mTOR modulates CD8+ T-cell differentiation during the immune response to IPA. TREM-1 may play a vital role in signal transduction between mTOR and the downstream immune response.
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Affiliation(s)
- Na Cui
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Hao Wang
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Long-Xiang Su
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Jia-Hui Zhang
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Yun Long
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Da-Wei Liu
- Department of Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing 100730, China
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Jameson SC, Masopust D. Understanding Subset Diversity in T Cell Memory. Immunity 2018; 48:214-226. [PMID: 29466754 PMCID: PMC5863745 DOI: 10.1016/j.immuni.2018.02.010] [Citation(s) in RCA: 347] [Impact Index Per Article: 57.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 01/05/2018] [Accepted: 02/05/2018] [Indexed: 12/30/2022]
Abstract
Considerable advances have been made in recent years in understanding the generation and function of memory T cells. Memory T cells are typically parsed into discreet subsets based on phenotypic definitions that connote distinct roles in immunity. Here we consider new developments in the field and focus on how emerging differences between memory cells with respect to their trafficking, metabolism, epigenetic regulation, and longevity may fail to fit into small groups of "memory subsets." Rather, the properties of individual memory T cells fall on a continuum within each of these and other parameters. We discuss how this continuum influences the way that the efficacy of vaccination is assessed, as well as the suitability of a memory population for protective immunity.
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Affiliation(s)
- Stephen C Jameson
- Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55414, USA.
| | - David Masopust
- Department of Microbiology and Immunology, University of Minnesota, Minneapolis, MN 55414, USA.
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186
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Tim-3 co-stimulation promotes short-lived effector T cells, restricts memory precursors, and is dispensable for T cell exhaustion. Proc Natl Acad Sci U S A 2018; 115:2455-2460. [PMID: 29463725 DOI: 10.1073/pnas.1712107115] [Citation(s) in RCA: 108] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Tim-3 is highly expressed on a subset of T cells during T cell exhaustion in settings of chronic viral infection and tumors. Using lymphocytic choriomeningitis virus (LCMV) Clone 13, a model for chronic infection, we found that Tim-3 was neither necessary nor sufficient for the development of T cell exhaustion. Nonetheless, expression of Tim-3 was sufficient to drive resistance to PD-L1 blockade therapy during chronic infection. Strikingly, expression of Tim-3 promoted the development of short-lived effector T cells, at the expense of memory precursor development, after acute LCMV infection. These effects were accompanied by increased Akt/mTOR signaling in T cells expressing endogenous or ectopic Tim-3. Conversely, Akt/mTOR signaling was reduced in effector T cells from Tim-3-deficient mice. Thus, Tim-3 is essential for optimal effector T cell responses, and may also contribute to exhaustion by restricting the development of long-lived memory T cells. Taken together, our results suggest that Tim-3 is actually more similar to costimulatory receptors that are up-regulated after T cell activation than to a dominant inhibitory protein like PD-1. These findings have significant implications for the development of anti-Tim-3 antibodies as therapeutic agents.
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187
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Metabolic exhaustion in infection, cancer and autoimmunity. Nat Immunol 2018; 19:213-221. [DOI: 10.1038/s41590-018-0045-y] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 12/22/2017] [Indexed: 12/16/2022]
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188
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Choi J, Pease DR, Chen S, Zhang B, Phee H. P21-activated kinase 2 is essential in maintenance of peripheral Foxp3 + regulatory T cells. Immunology 2018; 154:309-321. [PMID: 29297928 PMCID: PMC5980155 DOI: 10.1111/imm.12886] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 12/19/2017] [Accepted: 12/21/2017] [Indexed: 12/24/2022] Open
Abstract
The p21‐activated kinase 2 (Pak2), an effector molecule of the Rho family GTPases Rac and Cdc42, regulates diverse functions of T cells. Previously, we showed that Pak2 is required for development and maturation of T cells in the thymus, including thymus‐derived regulatory T (Treg) cells. However, whether Pak2 is required for the functions of various subsets of peripheral T cells, such as naive CD4 and helper T‐cell subsets including Foxp3+ Treg cells, is unknown. To determine the role of Pak2 in CD4 T cells in the periphery, we generated inducible Pak2 knockout (KO) mice, in which Pak2 was deleted in CD4 T cells acutely by administration of tamoxifen. Temporal deletion of Pak2 greatly reduced the number of Foxp3+ Treg cells, while minimally affecting the homeostasis of naive CD4 T cells. Pak2 was required for proliferation and Foxp3 expression of Foxp3+ Treg cells upon T‐cell receptor and interleukin‐2 stimulation, differentiation of in vitro induced Treg cells, and activation of naive CD4 T cells. Together, Pak2 is essential in maintaining the peripheral Treg cell pool by providing proliferation and maintenance signals to Foxp3+ Treg cells.
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Affiliation(s)
- Jinyong Choi
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - David Randall Pease
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Siqi Chen
- Department of Hematology and Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Bin Zhang
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Department of Hematology and Oncology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA
| | - Hyewon Phee
- Department of Microbiology-Immunology, Feinberg School of Medicine, Northwestern University, Chicago, IL, USA.,Amgen Inc, South San Francisco, CA, USA
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189
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190
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mTOR Cross-Talk in Cancer and Potential for Combination Therapy. Cancers (Basel) 2018; 10:cancers10010023. [PMID: 29351204 PMCID: PMC5789373 DOI: 10.3390/cancers10010023] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 01/15/2018] [Accepted: 01/16/2018] [Indexed: 12/20/2022] Open
Abstract
The mammalian Target of Rapamycin (mTOR) pathway plays an essential role in sensing and integrating a variety of exogenous cues to regulate cellular growth and metabolism, in both physiological and pathological conditions. mTOR functions through two functionally and structurally distinct multi-component complexes, mTORC1 and mTORC2, which interact with each other and with several elements of other signaling pathways. In the past few years, many new insights into mTOR function and regulation have been gained and extensive genetic and pharmacological studies in mice have enhanced our understanding of how mTOR dysfunction contributes to several diseases, including cancer. Single-agent mTOR targeting, mostly using rapalogs, has so far met limited clinical success; however, due to the extensive cross-talk between mTOR and other pathways, combined approaches are the most promising avenues to improve clinical efficacy of available therapeutics and overcome drug resistance. This review provides a brief and up-to-date narrative on the regulation of mTOR function, the relative contributions of mTORC1 and mTORC2 complexes to cancer development and progression, and prospects for mTOR inhibition as a therapeutic strategy.
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191
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Unexpected positive control of NFκB and miR-155 by DGKα and ζ ensures effector and memory CD8+ T cell differentiation. Oncotarget 2018; 7:33744-64. [PMID: 27014906 PMCID: PMC5085116 DOI: 10.18632/oncotarget.8164] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 03/04/2016] [Indexed: 11/25/2022] Open
Abstract
Signals from the T-cell receptor (TCR) and γ-chain cytokine receptors play crucial roles in initiating activation and effector/memory differentiation of CD8 T-cells. We report here that simultaneous deletion of both diacylglycerol kinase (DGK) α and ζ (DKO) severely impaired expansion of CD8 effector T cells and formation of memory CD8 T-cells after Listeria monocytogenes infection. Moreover, ablation of both DGKα and ζ in preformed memory CD8 T-cells triggered death and impaired homeostatic proliferation of these cells. DKO CD8 T-cells were impaired in priming due to decreased expression of chemokine receptors and migration to the draining lymph nodes. Moreover, DKO CD8 T-cells were unexpectedly defective in NFκB-mediated miR-155 transcript, leading to excessive SOCS1 expression and impaired γ-chain cytokine signaling. Our data identified a DGK-NFκB-miR-155-SOCS1 axis that bridges TCR and γ-chain cytokine signaling for robust CD8 T-cell primary and memory responses to bacterial infection.
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192
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193
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Backer RA, Hombrink P, Helbig C, Amsen D. The Fate Choice Between Effector and Memory T Cell Lineages: Asymmetry, Signal Integration, and Feedback to Create Bistability. Adv Immunol 2018; 137:43-82. [DOI: 10.1016/bs.ai.2017.12.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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194
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A Pck1-directed glycogen metabolic program regulates formation and maintenance of memory CD8 + T cells. Nat Cell Biol 2017; 20:21-27. [PMID: 29230018 DOI: 10.1038/s41556-017-0002-2] [Citation(s) in RCA: 118] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 10/31/2017] [Indexed: 01/03/2023]
Abstract
CD8+ memory T (Tm) cells are fundamental for protective immunity against infections and cancers 1-5 . Metabolic activities are crucial in controlling memory T-cell homeostasis, but mechanisms linking metabolic signals to memory formation and survival remain elusive. Here we show that CD8+ Tm cells markedly upregulate cytosolic phosphoenolpyruvate carboxykinase (Pck1), the hub molecule regulating glycolysis, tricarboxylic acid cycle and gluconeogenesis, to increase glycogenesis via gluconeogenesis. The resultant glycogen is then channelled to glycogenolysis to generate glucose-6-phosphate and the subsequent pentose phosphate pathway (PPP) that generates abundant NADPH, ensuring high levels of reduced glutathione in Tm cells. Abrogation of Pck1-glycogen-PPP decreases GSH/GSSG ratios and increases levels of reactive oxygen species (ROS), leading to impairment of CD8+ Tm formation and maintenance. Importantly, this metabolic regulatory mechanism could be readily translated into more efficient T-cell immunotherapy in mouse tumour models.
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195
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Sabins NC, Chornoguz O, Leander K, Kaplan F, Carter R, Kinder M, Bachman K, Verona R, Shen S, Bhargava V, Santulli-Marotto S. TIM-3 Engagement Promotes Effector Memory T Cell Differentiation of Human Antigen-Specific CD8 T Cells by Activating mTORC1. THE JOURNAL OF IMMUNOLOGY 2017; 199:4091-4102. [PMID: 29127145 DOI: 10.4049/jimmunol.1701030] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 10/16/2017] [Indexed: 01/19/2023]
Abstract
T cell expression of TIM-3 following Ag encounter has been associated with a continuum of functional states ranging from effector memory T cells to exhaustion. We have designed an in vitro culture system to specifically address the impact of anti-TIM-3/TIM-3 engagement on human Ag-specific CD8 T cells during a normal response to Ag and found that anti-TIM-3 treatment enhances T cell function. In our in vitro T cell culture system, MART1-specific CD8 T cells were expanded from healthy donors using artificial APCs. To ensure that the T cells were the only source of TIM-3, cells were rechallenged with peptide-loaded artificial APCs in the presence of anti-TIM-3 Ab. In these conditions, anti-TIM-3 treatment promotes generation of effector T cells as shown by acquisition of an activated phenotype, increased cytokine production, enhanced proliferation, and a transcription program associated with T cell differentiation. Activation of mTORC1 has been previously demonstrated to enhance CD8 T cell effector function and differentiation. Anti-TIM-3 drives CD8 T cell differentiation through activation of the mTORC1 as evidenced by increased levels of phosphorylated S6 protein and rhebl1 transcript. Altogether these findings suggest that anti-TIM-3, together with Ag, drives differentiation in favor of effector T cells via the activation of mTOR pathway. To our knowledge, this is the first report demonstrating that TIM-3 engagement during Ag stimulation directly influences T cell differentiation through mTORC1.
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Affiliation(s)
- Nina Chi Sabins
- Janssen Biotherapeutics, Janssen Research and Development, Spring House, PA 19477
| | - Olesya Chornoguz
- Janssen Biotherapeutics, Janssen Research and Development, Spring House, PA 19477
| | - Karen Leander
- Janssen Biotherapeutics, Janssen Research and Development, Spring House, PA 19477
| | - Fred Kaplan
- Oncology, Janssen Research and Development, Spring House, PA 19477
| | - Richard Carter
- Janssen Biotherapeutics, Janssen Research and Development, Spring House, PA 19477
| | - Michelle Kinder
- Oncology, Janssen Research and Development, Spring House, PA 19477
| | - Kurtis Bachman
- Oncology, Janssen Research and Development, Spring House, PA 19477
| | - Raluca Verona
- Oncology, Janssen Research and Development, Spring House, PA 19477
| | - Shixue Shen
- Oncology, Janssen Research and Development, Spring House, PA 19477
| | - Vipul Bhargava
- Computational and Systems Biology, Janssen Research and Development, Spring House, PA 19477; and
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196
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A single rapamycin dose protects against late-stage experimental cerebral malaria via modulation of host immunity, endothelial activation and parasite sequestration. Malar J 2017; 16:455. [PMID: 29121917 PMCID: PMC5679345 DOI: 10.1186/s12936-017-2092-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 10/27/2017] [Indexed: 01/05/2023] Open
Abstract
Background Maladaptive immune responses during cerebral malaria (CM) result in high mortality despite opportune anti-malarial chemotherapy. Rapamycin, an FDA-approved immunomodulator, protects against experimental cerebral malaria (ECM) in mice through effects on the host. However, the potential for reduced adaptive immunity with chronic use, combined with an incomplete understanding of mechanisms underlying protection, limit translational potential as an adjunctive therapy in CM. Results The results presented herein demonstrate that a single dose of rapamycin, provided as late as day 4 or 5 post-infection, protected mice from ECM neuropathology and death through modulation of distinct host responses to infection. Rapamycin prevented parasite cytoadherence in peripheral organs, including white adipose tissue, via reduction of CD36 expression. Rapamycin also altered the splenic immune response by reducing the number of activated T cells with migratory phenotype, while increasing local cytotoxic T cell activation. Finally, rapamycin reduced brain endothelial ICAM-1 expression concomitant with reduced brain pathology. Together, these changes potentially contributed to increased parasite elimination while reducing CD8 T cell migration to the brain. Conclusions Rapamycin exerts pleotropic effects on host immunity, vascular activation and parasite sequestration that rescue mice from ECM, and thus support the potential clinical use of rapamycin as an adjunctive therapy in CM.
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197
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mTOR signaling in immune cells and its implications for cancer immunotherapy. Cancer Lett 2017; 408:182-189. [DOI: 10.1016/j.canlet.2017.08.038] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Revised: 08/22/2017] [Accepted: 08/28/2017] [Indexed: 02/06/2023]
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198
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Shehata HM, Murphy AJ, Lee MKS, Gardiner CM, Crowe SM, Sanjabi S, Finlay DK, Palmer CS. Sugar or Fat?-Metabolic Requirements for Immunity to Viral Infections. Front Immunol 2017; 8:1311. [PMID: 29085369 PMCID: PMC5649203 DOI: 10.3389/fimmu.2017.01311] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 09/28/2017] [Indexed: 12/20/2022] Open
Abstract
The realization that an intricate link exists between the metabolic state of immune cells and the nature of the elicited immune responses has brought a dramatic evolution to the field of immunology. We will focus on how metabolic reprogramming through the use of glycolysis and fatty-acid oxidation (sugar or fat) regulates the capacity of immune cells to mount robust and effective immune responses. We will also discuss how fine-tuning sugar and fat metabolism may be exploited as a novel immunotherapeutic strategy to fight viral infections or improve vaccine efficacy.
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Affiliation(s)
- Hesham M Shehata
- Virology and Immunology, Gladstone Institutes, San Francisco, CA, United States
| | - Andrew J Murphy
- Haematopoiesis and Leukocyte Biology, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| | - Man Kit Sam Lee
- Haematopoiesis and Leukocyte Biology, Baker Heart and Diabetes Institute, Melbourne, VIC, Australia
| | - Clair M Gardiner
- School of Biochemistry and Immunology, Trinity College Dublin, Trinity Biomedical Sciences Institute, Dublin, Ireland
| | - Suzanne M Crowe
- Centre for Biomedical Research, Burnet Institute, Melbourne, VIC, Australia.,Department of Infectious Diseases, Monash University, Melbourne, VIC, Australia
| | - Shomyseh Sanjabi
- Virology and Immunology, Gladstone Institutes, San Francisco, CA, United States
| | - David K Finlay
- School of Biochemistry and Immunology, Trinity College Dublin, Trinity Biomedical Sciences Institute, Dublin, Ireland
| | - Clovis Steve Palmer
- Centre for Biomedical Research, Burnet Institute, Melbourne, VIC, Australia.,Department of Infectious Diseases, Monash University, Melbourne, VIC, Australia.,Department of Microbiology and Immunology, University of Melbourne, Melbourne, VIC, Australia
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199
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Yong CS, Abba Moussa D, Cretenet G, Kinet S, Dardalhon V, Taylor N. Metabolic orchestration of T lineage differentiation and function. FEBS Lett 2017; 591:3104-3118. [PMID: 28901530 DOI: 10.1002/1873-3468.12849] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Revised: 09/04/2017] [Accepted: 09/06/2017] [Indexed: 12/14/2022]
Abstract
T cells are stimulated by the engagement of antigen, cytokine, pathogen, and hormone receptors. While research performed over many years has focused on deciphering the molecular components of these pathways, recent data underscore the importance of the metabolic environment in conditioning responses to receptor engagement. The ability of T cells to undergo a massive proliferation and cytokine secretion in response to receptor signals requires alterations to their bioenergetic homeostasis, allowing them to meet new energetic and biosynthetic demands. The metabolic reprogramming of activated T cells is regulated not only by changes in intracellular nutrient uptake and utilization but also by nutrient and oxygen concentrations in the extracellular environment. Notably, the extracellular environment can be profoundly altered by pathological conditions such as infections and tumors, thereby perturbing the metabolism and function of antigen-specific T lymphocytes. This review highlights the interplay between diverse metabolic networks and the transcriptional/epigenetic states that condition T-cell differentiation, comparing the metabolic features of T lymphocytes with other immune cells. We further address recent discoveries in the metabolic pathways that govern T-cell function in physiological and pathological conditions.
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Affiliation(s)
- Carmen S Yong
- IGMM, CNRS, Univ. Montpellier, Montpellier, France
- Cancer Immunology Program, Peter MacCallum Cancer Centre, Melbourne, Vic., Australia
| | | | | | | | | | - Naomi Taylor
- IGMM, CNRS, Univ. Montpellier, Montpellier, France
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200
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Abstract
In healthy individuals, metabolically quiescent T cells survey lymph nodes and peripheral tissues in search of cognate antigens. During infection, T cells that encounter cognate antigens are activated and - in a context-specific manner - proliferate and/or differentiate to become effector T cells. This process is accompanied by important changes in cellular metabolism (known as metabolic reprogramming). The magnitude and spectrum of metabolic reprogramming as it occurs in T cells in the context of acute infection ensure host survival. By contrast, altered T cell metabolism, and hence function, is also observed in various disease states, in which T cells actively contribute to pathology. In this Review, we introduce the idea that the spectrum of immune cell metabolic states can provide a basis for categorizing human diseases. Specifically, we first summarize the metabolic and interlinked signalling requirements of T cells responding to acute infection. We then discuss how metabolic reprogramming of T cells is linked to disease.
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