1
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Fung HY, Espinal AM, Teryek M, Lemenze AD, Bergsbaken T. STAT4 increases the phenotypic and functional heterogeneity of intestinal tissue-resident memory T cells. Mucosal Immunol 2023; 16:250-263. [PMID: 36925068 PMCID: PMC10327535 DOI: 10.1016/j.mucimm.2023.03.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 03/05/2023] [Indexed: 03/17/2023]
Abstract
Tissue-resident memory T cells (Trms) are an important subset of lymphocytes that are lodged within non-lymphoid tissues and carry out diverse functions to control local pathogen replication. CD103 has been used to broadly define subsets of Trms within the intestine, with CD103+ and CD103- subsets having unique transcriptional profiles and effector functions. Here we identify signal transducer and activator of transcription 4 (STAT4) as an important regulator of CD103- Trm differentiation. STAT4-deficient cells trafficked to the intestine and localized to areas of infection but displayed impaired Trm differentiation with fewer CD103- Trms. Single-cell RNA-sequencing demonstrated that STAT4-deficiency led to a reduction in CD103- Trm subsets and expansion of a single population of CD103+ cells. Alterations in Trm populations were due, in part, to STAT4-mediated inhibition of transforming growth factor (TGF)-β-driven expression of Trm signature genes. STAT4-dependent Trm populations expressed genes associated with cytokine production and cell migration, and STAT4-deficient Trm cells had altered localization within the tissue and reduced effector function after reactivation in vivo. Overall, our data indicate that STAT4 leads to increased differentiation of CD103- Trms, in part by modulating the expression of TGF-β-regulated genes, and results in increased Trm heterogeneity and function within the intestinal tissue.
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Affiliation(s)
- Helen Y Fung
- Center for Immunity and Inflammation, Department of Pathology, Laboratory Medicine & Immunology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, USA
| | - Angie M Espinal
- Center for Immunity and Inflammation, Department of Pathology, Laboratory Medicine & Immunology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, USA
| | - Matthew Teryek
- Center for Immunity and Inflammation, Department of Pathology, Laboratory Medicine & Immunology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, USA
| | - Alexander D Lemenze
- Center for Immunity and Inflammation, Department of Pathology, Laboratory Medicine & Immunology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, USA
| | - Tessa Bergsbaken
- Center for Immunity and Inflammation, Department of Pathology, Laboratory Medicine & Immunology, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, USA.
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2
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CD8 T Cell Vaccines and a Cytomegalovirus-Based Vector Approach. Life (Basel) 2021; 11:life11101097. [PMID: 34685468 PMCID: PMC8538937 DOI: 10.3390/life11101097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Revised: 10/13/2021] [Accepted: 10/15/2021] [Indexed: 11/17/2022] Open
Abstract
The twentieth century witnessed a huge expansion in the number of vaccines used with great success in combating diseases, especially the ones caused by viral and bacterial pathogens. Despite this, several major public health threats, such as HIV, tuberculosis, malaria, and cancer, still pose an enormous humanitarian and economic burden. As vaccines based on the induction of protective, neutralizing antibodies have not managed to effectively combat these diseases, in recent decades, the focus has increasingly shifted towards the cellular immune response. There is substantial evidence demonstrating CD8 T cells as key players in the protection not only against many viral and bacterial pathogens, but also in the fight against neoplastic cells. Here, we present arguments for CD8 T cells to be considered as promising candidates for vaccine targeting. We discuss the heterogeneity of CD8 T cell populations and their contribution in the protection of the host. We also outline several strategies of using a common human pathogen, cytomegalovirus, as a vaccine vector since accumulated data strongly suggest it represents a promising approach to the development of novel vaccines against both pathogens and tumors.
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3
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Abstract
Immunological memory and exhaustion are fundamental features of adaptive immunity. Recent advances reveal increasing heterogeneity and diversity among CD8 T-cell subsets, resulting in new subsets to annotate and understand. Here, we review our current knowledge of differentiation and maintenance of memory and exhausted CD8 T cells, including phenotypic classification, developmental paths, transcriptional and epigenetic features, and cell intrinsic and extrinsic factors. Additionally, we use this outline to discuss the nomenclature of effector, memory, and exhausted CD8 T cells. Finally, we discuss how new findings about these cell types may impact the therapeutic efficacy and development of immunotherapies targeting effector, memory, and/or exhausted CD8 T cells in chronic infections and cancer.
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Affiliation(s)
- Yuki Muroyama
- Institute for Immunology
- Department of Systems Pharmacology and Translational Therapeutics
| | - E John Wherry
- Institute for Immunology
- Department of Systems Pharmacology and Translational Therapeutics
- Abramson Cancer Center
- Parker Institute for Cancer Immunotherapy, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA
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4
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Milner JJ, Toma C, Quon S, Omilusik K, Scharping NE, Dey A, Reina-Campos M, Nguyen H, Getzler AJ, Diao H, Yu B, Delpoux A, Yoshida TM, Li D, Qi J, Vincek A, Hedrick SM, Egawa T, Zhou MM, Crotty S, Ozato K, Pipkin ME, Goldrath AW. Bromodomain protein BRD4 directs and sustains CD8 T cell differentiation during infection. J Exp Med 2021; 218:e20202512. [PMID: 34037670 PMCID: PMC8160575 DOI: 10.1084/jem.20202512] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 03/10/2021] [Accepted: 05/03/2021] [Indexed: 12/26/2022] Open
Abstract
In response to infection, pathogen-specific CD8 T cells differentiate into functionally diverse effector and memory T cell populations critical for resolving disease and providing durable immunity. Through small-molecule inhibition, RNAi studies, and induced genetic deletion, we reveal an essential role for the chromatin modifier and BET family member BRD4 in supporting the differentiation and maintenance of terminally fated effector CD8 T cells during infection. BRD4 bound diverse regulatory regions critical to effector T cell differentiation and controlled transcriptional activity of terminal effector-specific super-enhancers in vivo. Consequentially, induced deletion of Brd4 or small molecule-mediated BET inhibition impaired maintenance of a terminal effector T cell phenotype. BRD4 was also required for terminal differentiation of CD8 T cells in the tumor microenvironment in murine models, which we show has implications for immunotherapies. Taken together, these data reveal an unappreciated requirement for BRD4 in coordinating activity of cis regulatory elements to control CD8 T cell fate and lineage stability.
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Affiliation(s)
- J. Justin Milner
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Clara Toma
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Sara Quon
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Kyla Omilusik
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Nicole E. Scharping
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Anup Dey
- Division of Developmental Biology, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD
| | - Miguel Reina-Campos
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Hongtuyet Nguyen
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Adam J. Getzler
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Huitian Diao
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Bingfei Yu
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Arnaud Delpoux
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Tomomi M. Yoshida
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
| | - Deyao Li
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA
- Department of Medicine, Harvard Medical School, Boston, MA
| | - Jun Qi
- Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, MA
- Department of Medicine, Harvard Medical School, Boston, MA
| | - Adam Vincek
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Stephen M. Hedrick
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
- Department of Cellular and Molecular Medicine, University of California San Diego, La Jolla, CA
| | - Takeshi Egawa
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO
| | - Ming-Ming Zhou
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Shane Crotty
- Division of Vaccine Discovery, La Jolla Institute for Allergy and Immunology, La Jolla, CA
- Division of Infectious Diseases, Department of Medicine, University of California San Diego, La Jolla, CA
| | - Keiko Ozato
- Division of Developmental Biology, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, MD
| | - Matthew E. Pipkin
- Department of Immunology and Microbiology, The Scripps Research Institute, Jupiter, FL
| | - Ananda W. Goldrath
- Division of Biological Sciences, University of California San Diego, La Jolla, CA
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5
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Delineation of a molecularly distinct terminally differentiated memory CD8 T cell population. Proc Natl Acad Sci U S A 2020; 117:25667-25678. [PMID: 32978300 PMCID: PMC7568335 DOI: 10.1073/pnas.2008571117] [Citation(s) in RCA: 65] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Memory CD8 T cells provide durable protection against diverse intracellular pathogens and can be broadly segregated into distinct circulating and tissue-resident populations. Paradigmatic studies have demonstrated that circulating memory cells can be further divided into effector memory (Tem) and central memory (Tcm) populations based on discrete functional characteristics. Following resolution of infection, we identified a persisting antigen-specific CD8 T cell population that was terminally fated with potent effector function but maintained memory T cell qualities and conferred robust protection against reinfection. Notably, this terminally differentiated effector memory CD8 T cell population (terminal-Tem) was conflated within the conventional Tem population, prompting redefinition of the classical characteristics of Tem cells. Murine terminal-Tem were transcriptionally, functionally, and developmentally unique compared to Tem cells. Through mass cytometry and single-cell RNA sequencing (RNA-seq) analyses of human peripheral blood from healthy individuals, we also identified an analogous terminal-Tem population of CD8 T cells that was transcriptionally distinct from Tem and Tcm Key findings from this study show that parsing of terminal-Tem from conventionally defined Tem challenge the reported characteristics of Tem biology, including enhanced presence in lymphoid tissues, robust IL-2 production, and recall potential, greater than expected homeostatic fitness, refined transcription factor dependencies, and a distinct molecular phenotype. Classification of terminal-Tem and clarification of Tem biology hold broad implications for understanding the molecular regulation of memory cell states and harnessing immunological memory to improve immunotherapies.
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6
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Milner JJ, Toma C, He Z, Kurd NS, Nguyen QP, McDonald B, Quezada L, Widjaja CE, Witherden DA, Crowl JT, Shaw LA, Yeo GW, Chang JT, Omilusik KD, Goldrath AW. Heterogenous Populations of Tissue-Resident CD8 + T Cells Are Generated in Response to Infection and Malignancy. Immunity 2020; 52:808-824.e7. [PMID: 32433949 PMCID: PMC7784612 DOI: 10.1016/j.immuni.2020.04.007] [Citation(s) in RCA: 157] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 01/21/2020] [Accepted: 04/17/2020] [Indexed: 11/23/2022]
Abstract
Tissue-resident memory CD8+ T cells (Trm) provide host protection through continuous surveillance of non-lymphoid tissues. Using single-cell RNA-sequencing (scRNA-seq) and genetic reporter mice, we identified discrete lineages of intestinal antigen-specific CD8+ T cells, including a Blimp1hiId3lo tissue-resident effector cell population most prominent in the early phase of acute viral and bacterial infections and a molecularly distinct Blimp1loId3hi tissue-resident memory population that subsequently accumulated at later infection time points. These Trm populations exhibited distinct cytokine production, secondary memory potential, and transcriptional programs including differential roles for transcriptional regulators Blimp1, T-bet, Id2, and Id3 in supporting and maintaining intestinal Trm. Extending our analysis to malignant tissue, we also identified discrete populations of effector-like and memory-like CD8+ T cell populations with tissue-resident gene-expression signatures that shared features of terminally exhausted and progenitor-exhausted T cells, respectively. Our findings provide insight into the development and functional heterogeneity of Trm cells, which has implications for enhancing vaccination and immunotherapy approaches.
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Affiliation(s)
- J Justin Milner
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA, USA
| | - Clara Toma
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA, USA
| | - Zhaoren He
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Nadia S Kurd
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Quynh P Nguyen
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA, USA
| | - Bryan McDonald
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA, USA
| | - Lauren Quezada
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | | | - Deborah A Witherden
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA, USA
| | - John T Crowl
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA, USA
| | - Laura A Shaw
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA, USA
| | - Gene W Yeo
- Department of Cellular and Molecular Medicine, University of California, San Diego, La Jolla, CA, USA
| | - John T Chang
- Department of Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Kyla D Omilusik
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA, USA.
| | - Ananda W Goldrath
- Division of Biological Sciences, University of California, San Diego, La Jolla, CA, USA.
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7
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Memory CD4 + T Cells in Immunity and Autoimmune Diseases. Cells 2020; 9:cells9030531. [PMID: 32106536 PMCID: PMC7140455 DOI: 10.3390/cells9030531] [Citation(s) in RCA: 95] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/20/2020] [Accepted: 02/20/2020] [Indexed: 12/26/2022] Open
Abstract
CD4+ T helper (Th) cells play central roles in immunity in health and disease. While much is known about the effector function of Th cells in combating pathogens and promoting autoimmune diseases, the roles and biology of memory CD4+ Th cells are complex and less well understood. In human autoimmune diseases such as multiple sclerosis (MS), there is a critical need to better understand the function and biology of memory T cells. In this review article we summarize current concepts in the field of CD4+ T cell memory, including natural history, developmental pathways, subsets, and functions. Furthermore, we discuss advancements in the field of the newly-described CD4+ tissue-resident memory T cells and of CD4+ memory T cells in autoimmune diseases, two major areas of important unresolved questions in need of answering to advance new vaccine design and development of novel treatments for CD4+ T cell-mediated autoimmune diseases.
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8
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Abstract
MicroRNAs (miRNAs) are a class of short noncoding RNAs that play critical roles in the regulation of a broad range of biological processes. Like transcription factors, miRNAs exert their effects by modulating the expression of networks of genes that operate in common or convergent pathways. CD8+ T cells are critical agents of the adaptive immune system that provide protection from infection and cancer. Here, we review the important roles of miRNAs in the regulation of CD8+ T cell biology and provide perspectives on the broader emerging principles of miRNA function.
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Affiliation(s)
- John D Gagnon
- Sandler Asthma Basic Research Center, Department of Microbiology & Immunology, University of California San Francisco, San Francisco, CA, USA
| | - K Mark Ansel
- Sandler Asthma Basic Research Center, Department of Microbiology & Immunology, University of California San Francisco, San Francisco, CA, USA
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9
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Tinoco R, Carrette F, Henriquez ML, Fujita Y, Bradley LM. Fucosyltransferase Induction during Influenza Virus Infection Is Required for the Generation of Functional Memory CD4 + T Cells. THE JOURNAL OF IMMUNOLOGY 2018; 200:2690-2702. [PMID: 29491007 DOI: 10.4049/jimmunol.1701251] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Accepted: 02/04/2018] [Indexed: 11/19/2022]
Abstract
T cells mediating influenza viral control are instructed in lymphoid and nonlymphoid tissues to differentiate into memory T cells that confer protective immunity. The mechanisms by which influenza virus-specific memory CD4+ T cells arise have been attributed to changes in transcription factors, cytokines and cytokine receptors, and metabolic programming. The molecules involved in these biosynthetic pathways, including proteins and lipids, are modified to varying degrees of glycosylation, fucosylation, sialation, and sulfation, which can alter their function. It is currently unknown how the glycome enzymatic machinery regulates CD4+ T cell effector and memory differentiation. In a murine model of influenza virus infection, we found that fucosyltransferase enzymatic activity was induced in effector and memory CD4+ T cells. Using CD4+ T cells deficient in the Fut4/7 enzymes that are expressed only in hematopoietic cells, we found decreased frequencies of effector cells with reduced expression of T-bet and NKG2A/C/E in the lungs during primary infection. Furthermore, Fut4/7-/- effector CD4+ T cells had reduced survival with no difference in proliferation or capacity for effector function. Although Fut4/7-/- CD4+ T cells seeded the memory pool after primary infection, they failed to form tissue-resident cells, were dysfunctional, and were unable to re-expand after secondary infection. Our findings highlight an important regulatory axis mediated by cell-intrinsic fucosyltransferase activity in CD4+ T cell effectors that ensure the development of functional memory CD4+ T cells.
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Affiliation(s)
- Roberto Tinoco
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037
| | - Florent Carrette
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037
| | - Monique L Henriquez
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037
| | - Yu Fujita
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037
| | - Linda M Bradley
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037
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10
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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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11
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Dominguez CX, Amezquita RA, Guan T, Marshall HD, Joshi NS, Kleinstein SH, Kaech SM. The transcription factors ZEB2 and T-bet cooperate to program cytotoxic T cell terminal differentiation in response to LCMV viral infection. J Exp Med 2015; 212:2041-56. [PMID: 26503446 PMCID: PMC4647261 DOI: 10.1084/jem.20150186] [Citation(s) in RCA: 193] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 09/15/2015] [Indexed: 12/16/2022] Open
Abstract
The transcription factor T-bet is critical for cytotoxic T lymphocyte (CTL) differentiation, but it is unclear how it operates in a graded manner in the formation of both terminal effector and memory precursor cells during viral infection. We find that, at high concentrations, T-bet induced expression of Zeb2 mRNA, which then triggered CTLs to adopt terminally differentiated states. ZEB2 and T-bet cooperate to switch on a terminal CTL differentiation program, while simultaneously repressing genes necessary for central memory CTL development. Chromatin immunoprecipitation sequencing showed that a large proportion of these genes were bound by T-bet, and this binding was altered by ZEB2 deficiency. Furthermore, T-bet overexpression could not fully bypass ZEB2 function. Thus, the coordinated actions of T-bet and ZEB2 outline a novel genetic pathway that forces commitment of CTLs to terminal differentiation, thereby restricting their memory cell potential.
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Affiliation(s)
- Claudia X Dominguez
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
| | - Robert A Amezquita
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520 Howard Hughes Medical Institute, Chevy Chase, MD 20815
| | - Tianxia Guan
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520 Howard Hughes Medical Institute, Chevy Chase, MD 20815
| | - Heather D Marshall
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
| | - Nikhil S Joshi
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520
| | - Steven H Kleinstein
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520 Interdepartmental Program in Computational Biology and Bioinformatics, Yale University School of Medicine, New Haven, CT 06520 Department of Pathology, Yale University School of Medicine, New Haven, CT 06520
| | - Susan M Kaech
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520 Howard Hughes Medical Institute, Chevy Chase, MD 20815
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12
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Chang JT, Wherry EJ, Goldrath AW. Molecular regulation of effector and memory T cell differentiation. Nat Immunol 2014; 15:1104-15. [PMID: 25396352 PMCID: PMC4386685 DOI: 10.1038/ni.3031] [Citation(s) in RCA: 407] [Impact Index Per Article: 40.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Accepted: 10/14/2014] [Indexed: 02/07/2023]
Abstract
Immunological memory is a cardinal feature of adaptive immunity and an important goal of vaccination strategies. Here we highlight advances in the understanding of the diverse T lymphocyte subsets that provide acute and long-term protection from infection. These include new insights into the transcription factors, and the upstream 'pioneering' factors that regulate their accessibility to key sites of gene regulation, as well as metabolic regulators that contribute to the differentiation of effector and memory subsets; ontogeny and defining characteristics of tissue-resident memory lymphocytes; and origins of the remarkable heterogeneity exhibited by activated T cells. Collectively, these findings underscore progress in delineating the underlying pathways that control diversification in T cell responses but also reveal gaps in the knowledge, as well as the challenges that arise in the application of this knowledge to rationally elicit desired T cell responses through vaccination and immunotherapy.
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Affiliation(s)
- John T Chang
- Department of Medicine, University of California San Diego, La Jolla, California, USA
| | - E John Wherry
- 1] Institute for Immunology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA. [2] Department of Microbiology, University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Ananda W Goldrath
- Division of Biological Sciences, University of California San Diego, La Jolla, California, USA
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13
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Yu SF, Zhang YN, Yang BY, Wu CY. Human memory, but not naive, CD4+ T cells expressing transcription factor T-bet might drive rapid cytokine production. J Biol Chem 2014; 289:35561-9. [PMID: 25378399 DOI: 10.1074/jbc.m114.608745] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
We found that after stimulation for a few hours, memory but not naive CD4(+) T cells produced a large amount of IFN-γ; however, the mechanism of rapid response of memory CD4(+) T cells remains undefined. We compared the expression of transcription factors in resting or activated naive and memory CD4(+) T cells and found that T-bet, but not pSTAT-1 or pSTAT-4, was highly expressed in resting memory CD4(+) T cells and that phenotypic characteristics of T-bet(+)CD4(+) T cells were CD45RA(low)CD62L(low) CCR7(low). After short-term stimulation, purified memory CD4(+) T cells rapidly produced effector cytokines that were closely associated with the pre-existence of T-bet. By contrast, resting naive CD4(+) T cells did not express T-bet, and they produced cytokines only after sustained stimulation. Our further studies indicated that T-bet was expressed in the nuclei of resting memory CD4(+) T cells, which might have important implications for rapid IFN-γ production. Our results indicate that the pre-existence and nuclear mobilization of T-bet in resting memory CD4(+) T cells might be a possible transcriptional mechanism for rapid production of cytokines by human memory CD4(+) T cells.
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Affiliation(s)
- Si-fei Yu
- From the Institute of Immunology, Zhongshan School of Medicine, Key Laboratory of Tropical Disease Control Research of Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Yan-nan Zhang
- From the Institute of Immunology, Zhongshan School of Medicine, Key Laboratory of Tropical Disease Control Research of Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Bin-yan Yang
- From the Institute of Immunology, Zhongshan School of Medicine, Key Laboratory of Tropical Disease Control Research of Ministry of Education, Sun Yat-sen University, Guangzhou, China
| | - Chang-you Wu
- From the Institute of Immunology, Zhongshan School of Medicine, Key Laboratory of Tropical Disease Control Research of Ministry of Education, Sun Yat-sen University, Guangzhou, China
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14
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CD8 T cells in innate immune responses: using STAT4-dependent but antigen-independent pathways to gamma interferon during viral infection. mBio 2014; 5:e01978-14. [PMID: 25336459 PMCID: PMC4212840 DOI: 10.1128/mbio.01978-14] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
The cytokine gamma interferon (IFN-γ), with antimicrobial and immunoregulatory functions, can be produced by T cells following stimulation through their T cell receptors (TCRs) for antigen. The innate cytokines type 1 IFNs and interleukin-12 (IL-12) can also stimulate IFN-γ production by natural killer (NK) but not naive T cells. High basal expression of signal transducer and activator of transcription 4 (STAT4), used by type 1 IFN and IL-12 to induce IFN-γ as well as CD25, contributes to the NK cell responses. During acute viral infections, antigen-specific CD8 T cells are stimulated to express elevated STAT4 and respond to the innate factors with IFN-γ production. Little is known about the requirements for cytokine compared to TCR stimulation. Primary infections of mice with lymphocytic choriomeningitis virus (LCMV) demonstrated that although the elicited antigen-specific CD8 T cells acquired STAT4-dependent innate cytokine responsiveness for IFN-γ and CD25 induction ex vivo, TCR stimulation induced these through STAT4-independent pathways. During secondary infections, LCMV-immune CD8 T cells had STAT4-dependent IFN-γ expression at times of innate cytokine induction but subsequently expanded through STAT4-independent pathways. At times of innate cytokine responses during infection with the antigen-distinct murine cytomegalovirus virus (MCMV), NK and LCMV-immune CD8 T cells both had activation of pSTAT4 and IFN-γ. The T cell IFN-γ response was STAT4 and IL-12 dependent, but antigen-dependent expansion was absent. By dissecting requirements for STAT4 and antigen, this work provides novel insights into the endogenous regulation of cytokine and proliferative responses and demonstrates conditioning of innate immunity by experience. Understanding the regulation and function of adaptive immunity is key to the development of new and improved vaccines. Its CD8 T cells are activated through antigen-specific receptors to contribute to long-lasting immunity after natural infections or purposeful immunization. The antigen-receptor pathway of stimulation can lead to production of gamma interferon (IFN-γ), a cytokine having both direct antimicrobial and immunoregulatory functions. Natural killer cells can also produce IFN-γ in response to the innate cytokines type 1 IFNs and/or interleukin-12. This work demonstrates that CD8 T cells acquire parallel responsiveness to innate cytokine signaling for IFN-γ expression during their selection and development and maintain this capability to participate in innate immune responses as long-lived memory cells. Thus, CD8 T cells are conditioned to play a role in innate immunity, and their presence under immune conditions has the potential to regulate resistance to either secondary challenges or primary infections with unrelated agents.
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15
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Whitmire JK. Editorial: Not all roads to T cell memory go through STAT4 and T-bet. J Leukoc Biol 2014; 95:699-701. [PMID: 27929377 DOI: 10.1189/jlb.1113578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 02/02/2014] [Accepted: 02/05/2014] [Indexed: 11/24/2022] Open
Affiliation(s)
- Jason K Whitmire
- University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
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