1
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Correa-Medero LO, Jankowski SE, Hong HS, Armas ND, Vijendra AI, Reynolds MB, Fogo GM, Awad D, Dils AT, Inoki KA, Williams RG, Ye AM, Svezhova N, Gomez-Rivera F, Collins KL, O'Riordan MX, Sanderson TH, Lyssiotis CA, Carty SA. ER-associated degradation adapter Sel1L is required for CD8 + T cell function and memory formation following acute viral infection. Cell Rep 2024; 43:114156. [PMID: 38687642 PMCID: PMC11194752 DOI: 10.1016/j.celrep.2024.114156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 03/06/2024] [Accepted: 04/10/2024] [Indexed: 05/02/2024] Open
Abstract
The maintenance of antigen-specific CD8+ T cells underlies the efficacy of vaccines and immunotherapies. Pathways contributing to CD8+ T cell loss are not completely understood. Uncovering the pathways underlying the limited persistence of CD8+ T cells would be of significant benefit for developing novel strategies of promoting T cell persistence. Here, we demonstrate that murine CD8+ T cells experience endoplasmic reticulum (ER) stress following activation and that the ER-associated degradation (ERAD) adapter Sel1L is induced in activated CD8+ T cells. Sel1L loss limits CD8+ T cell function and memory formation following acute viral infection. Mechanistically, Sel1L is required for optimal bioenergetics and c-Myc expression. Finally, we demonstrate that human CD8+ T cells experience ER stress upon activation and that ER stress is negatively associated with improved T cell functionality in T cell-redirecting therapies. Together, these results demonstrate that ER stress and ERAD are important regulators of T cell function and persistence.
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Affiliation(s)
- Luis O Correa-Medero
- Graduate Program in Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | | | - Hanna S Hong
- Graduate Program in Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Nicholas D Armas
- Graduate Program in Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | | | - Mack B Reynolds
- Graduate Program in Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Garrett M Fogo
- Neuroscience Graduate Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Dominik Awad
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Alexander T Dils
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA
| | | | - Reid G Williams
- Graduate Program in Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | | | - Nadezhda Svezhova
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA; Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | | | - Kathleen L Collins
- Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA; Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA; Cellular and Molecular Biology Graduate Program, University of Michigan, Ann Arbor, MI 48109, USA
| | - Mary X O'Riordan
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Thomas H Sanderson
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA; Department of Emergency Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, USA
| | - Costas A Lyssiotis
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, MI 48109, USA; Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA
| | - Shannon A Carty
- Division of Hematology and Oncology, Department of Internal Medicine, University of Michigan, Ann Arbor, MI 48109, USA; Rogel Cancer Center, University of Michigan, Ann Arbor, MI 48109, USA.
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2
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Eggert J, Zinzow-Kramer WM, Hu Y, Kolawole EM, Tsai YL, Weiss A, Evavold BD, Salaita K, Scharer CD, Au-Yeung BB. Cbl-b mitigates the responsiveness of naive CD8 + T cells that experience extensive tonic T cell receptor signaling. Sci Signal 2024; 17:eadh0439. [PMID: 38319998 PMCID: PMC10897907 DOI: 10.1126/scisignal.adh0439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 01/18/2024] [Indexed: 02/08/2024]
Abstract
Naive T cells experience tonic T cell receptor (TCR) signaling in response to self-antigens presented by major histocompatibility complex (MHC) in secondary lymphoid organs. We investigated how relatively weak or strong tonic TCR signals influence naive CD8+ T cell responses to stimulation with foreign antigens. The heterogeneous expression of Nur77-GFP, a transgenic reporter of tonic TCR signaling, in naive CD8+ T cells suggests variable intensities or durations of tonic TCR signaling. Although the expression of genes associated with acutely stimulated T cells was increased in Nur77-GFPHI cells, these cells were hyporesponsive to agonist TCR stimulation compared with Nur77-GFPLO cells. This hyporesponsiveness manifested as diminished activation marker expression and decreased secretion of IFN-γ and IL-2. The protein abundance of the ubiquitin ligase Cbl-b, a negative regulator of TCR signaling, was greater in Nur77-GFPHI cells than in Nur77-GFPLO cells, and Cbl-b deficiency partially restored the responsiveness of Nur77-GFPHI cells. Our data suggest that the cumulative effects of previously experienced tonic TCR signaling recalibrate naive CD8+ T cell responsiveness. These changes include gene expression changes and negative regulation partially dependent on Cbl-b. This cell-intrinsic negative feedback loop may enable the immune system to restrain naive CD8+ T cells with higher self-reactivity.
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Affiliation(s)
- Joel Eggert
- Division of Immunology, Lowance Center for Human Immunology, Department of Medicine, Emory University; Atlanta, 30322, USA
| | - Wendy M. Zinzow-Kramer
- Division of Immunology, Lowance Center for Human Immunology, Department of Medicine, Emory University; Atlanta, 30322, USA
| | - Yuesong Hu
- Department of Chemistry, Emory University; Atlanta, 30322, USA
| | - Elizabeth M. Kolawole
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, 84112, USA
| | - Yuan-Li Tsai
- Rosalind Russell and Ephraim P. Engleman Rheumatology Research Center, Departments of Medicine and of Microbiology and Immunology, University of California, San Francisco; San Francisco, 94143, USA
| | - Arthur Weiss
- Rosalind Russell and Ephraim P. Engleman Rheumatology Research Center, Departments of Medicine and of Microbiology and Immunology, University of California, San Francisco; San Francisco, 94143, USA
| | - Brian D. Evavold
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, 84112, USA
| | - Khalid Salaita
- Department of Chemistry, Emory University; Atlanta, 30322, USA
| | | | - Byron B. Au-Yeung
- Division of Immunology, Lowance Center for Human Immunology, Department of Medicine, Emory University; Atlanta, 30322, USA
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3
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Wither MJ, White WL, Pendyala S, Leanza PJ, Fowler DM, Kueh HY. Antigen perception in T cells by long-term Erk and NFAT signaling dynamics. Proc Natl Acad Sci U S A 2023; 120:e2308366120. [PMID: 38113261 PMCID: PMC10756264 DOI: 10.1073/pnas.2308366120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 10/20/2023] [Indexed: 12/21/2023] Open
Abstract
Immune system threat detection hinges on T cells' ability to perceive varying peptide-major histocompatibility complex (pMHC) antigens. As the Erk and NFAT pathways link T cell receptor engagement to gene regulation, their signaling dynamics may convey information about pMHC inputs. To test this idea, we developed a dual reporter mouse strain and a quantitative imaging assay that, together, enable simultaneous monitoring of Erk and NFAT dynamics in live T cells over day-long timescales as they respond to varying pMHC inputs. Both pathways initially activate uniformly across various pMHC inputs but diverge only over longer (9+ h) timescales, enabling independent encoding of pMHC affinity and dose. These late signaling dynamics are decoded via multiple temporal and combinatorial mechanisms to generate pMHC-specific transcriptional responses. Our findings underscore the importance of long timescale signaling dynamics in antigen perception and establish a framework for understanding T cell responses under diverse contexts.
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Affiliation(s)
- Matthew J. Wither
- University of Washington, Department of Bioengineering, Seattle, WA98195
| | - William L. White
- University of Washington, Department of Bioengineering, Seattle, WA98195
| | - Sriram Pendyala
- University of Washington, Department of Genome Sciences, Seattle, WA98195
| | - Paul J. Leanza
- University of Washington, Department of Bioengineering, Seattle, WA98195
| | - Douglas M. Fowler
- University of Washington, Department of Genome Sciences, Seattle, WA98195
| | - Hao Yuan Kueh
- University of Washington, Department of Bioengineering, Seattle, WA98195
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA98109
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4
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McDonald B, Chick BY, Ahmed NS, Burns M, Ma S, Casillas E, Chen D, Mann TH, O'Connor C, Hah N, Hargreaves DC, Kaech SM. Canonical BAF complex activity shapes the enhancer landscape that licenses CD8 + T cell effector and memory fates. Immunity 2023; 56:1303-1319.e5. [PMID: 37315534 PMCID: PMC10281564 DOI: 10.1016/j.immuni.2023.05.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 02/08/2023] [Accepted: 05/10/2023] [Indexed: 06/16/2023]
Abstract
CD8+ T cells provide host protection against pathogens by differentiating into distinct effector and memory cell subsets, but how chromatin is site-specifically remodeled during their differentiation is unclear. Due to its critical role in regulating chromatin and enhancer accessibility through its nucleosome remodeling activities, we investigated the role of the canonical BAF (cBAF) chromatin remodeling complex in antiviral CD8+ T cells during infection. ARID1A, a subunit of cBAF, was recruited early after activation and established de novo open chromatin regions (OCRs) at enhancers. Arid1a deficiency impaired the opening of thousands of activation-induced enhancers, leading to loss of TF binding, dysregulated proliferation and gene expression, and failure to undergo terminal effector differentiation. Although Arid1a was dispensable for circulating memory cell formation, tissue-resident memory (Trm) formation was strongly impaired. Thus, cBAF governs the enhancer landscape of activated CD8+ T cells that orchestrates TF recruitment and activity and the acquisition of specific effector and memory differentiation states.
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Affiliation(s)
- Bryan McDonald
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA 92037, USA; Biomedical Sciences Graduate Program, University of California at San Diego, La Jolla, CA 92093, USA
| | - Brent Y Chick
- Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA; Biological Sciences Graduate Program, University of California at San Diego, La Jolla, CA 92093, USA
| | - Nasiha S Ahmed
- Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Mannix Burns
- Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Shixin Ma
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Eduardo Casillas
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Dan Chen
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Thomas H Mann
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Carolyn O'Connor
- Flow Cytometry Core, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Nasun Hah
- Chapman Charitable Foundations Genomic Sequencing Core, The Salk Institute for Biological Studies, La Jolla, CA, USA
| | - Diana C Hargreaves
- Molecular and Cell Biology Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
| | - Susan M Kaech
- NOMIS Center for Immunobiology and Microbial Pathogenesis, Salk Institute for Biological Studies, La Jolla, CA 92037, USA.
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5
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Baxter AE, Huang H, Giles JR, Chen Z, Wu JE, Drury S, Dalton K, Park SL, Torres L, Simone BW, Klapholz M, Ngiow SF, Freilich E, Manne S, Alcalde V, Ekshyyan V, Berger SL, Shi J, Jordan MS, Wherry EJ. The SWI/SNF chromatin remodeling complexes BAF and PBAF differentially regulate epigenetic transitions in exhausted CD8 + T cells. Immunity 2023; 56:1320-1340.e10. [PMID: 37315535 DOI: 10.1016/j.immuni.2023.05.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Revised: 02/28/2023] [Accepted: 05/11/2023] [Indexed: 06/16/2023]
Abstract
CD8+ T cell exhaustion (Tex) limits disease control during chronic viral infections and cancer. Here, we investigated the epigenetic factors mediating major chromatin-remodeling events in Tex-cell development. A protein-domain-focused in vivo CRISPR screen identified distinct functions for two versions of the SWI/SNF chromatin-remodeling complex in Tex-cell differentiation. Depletion of the canonical SWI/SNF form, BAF, impaired initial CD8+ T cell responses in acute and chronic infection. In contrast, disruption of PBAF enhanced Tex-cell proliferation and survival. Mechanistically, PBAF regulated the epigenetic and transcriptional transition from TCF-1+ progenitor Tex cells to more differentiated TCF-1- Tex subsets. Whereas PBAF acted to preserve Tex progenitor biology, BAF was required to generate effector-like Tex cells, suggesting that the balance of these factors coordinates Tex-cell subset differentiation. Targeting PBAF improved tumor control both alone and in combination with anti-PD-L1 immunotherapy. Thus, PBAF may present a therapeutic target in cancer immunotherapy.
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Affiliation(s)
- Amy E Baxter
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Hua Huang
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Epigenetics Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Josephine R Giles
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Parker Institute for Cancer Immunotherapy, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Zeyu Chen
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Jennifer E Wu
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Parker Institute for Cancer Immunotherapy, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Sydney Drury
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Katherine Dalton
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Simone L Park
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Leonel Torres
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Center for Cellular Immunotherapies, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Brandon W Simone
- Center for Cellular Immunotherapies, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Max Klapholz
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Parker Institute for Cancer Immunotherapy, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Radiation Oncology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Shin Foong Ngiow
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Parker Institute for Cancer Immunotherapy, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Elizabeth Freilich
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Epigenetics Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Cancer Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Sasikanth Manne
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Victor Alcalde
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Viktoriya Ekshyyan
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Shelley L Berger
- Epigenetics Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Cancer Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Cell and Developmental Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA
| | - Junwei Shi
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Epigenetics Institute, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Cancer Biology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.
| | - Martha S Jordan
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Parker Institute for Cancer Immunotherapy, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.
| | - E John Wherry
- Institute for Immunology and Immune Health, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA; Parker Institute for Cancer Immunotherapy, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104, USA.
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6
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Wither MJ, White WL, Pendyala S, Leanza PJ, Fowler D, Kueh HY. Antigen perception in T cells by long-term Erk and NFAT signaling dynamics. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.06.01.543260. [PMID: 37333368 PMCID: PMC10274683 DOI: 10.1101/2023.06.01.543260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
Abstract
Immune system threat detection hinges on T cells' ability to perceive varying peptide major-histocompatibility complex (pMHC) antigens. As the Erk and NFAT pathways link T cell receptor engagement to gene regulation, their signaling dynamics may convey information about pMHC inputs. To test this idea, we developed a dual reporter mouse strain and a quantitative imaging assay that, together, enable simultaneous monitoring of Erk and NFAT dynamics in live T cells over day-long timescales as they respond to varying pMHC inputs. Both pathways initially activate uniformly across various pMHC inputs, but diverge only over longer (9+ hrs) timescales, enabling independent encoding of pMHC affinity and dose. These late signaling dynamics are decoded via multiple temporal and combinatorial mechanisms to generate pMHC-specific transcriptional responses. Our findings underscore the importance of long timescale signaling dynamics in antigen perception, and establish a framework for understanding T cell responses under diverse contexts. SIGNIFICANCE STATEMENT To counter diverse pathogens, T cells mount distinct responses to varying peptide-major histocompatibility complex ligands (pMHCs). They perceive the affinity of pMHCs for the T cell receptor (TCR), which reflects its foreignness, as well as pMHC abundance. By tracking signaling responses in single living cells to different pMHCs, we find that T cells can independently perceive pMHC affinity vs dose, and encode this information through the dynamics of Erk and NFAT signaling pathways downstream of the TCR. These dynamics are jointly decoded by gene regulatory mechanisms to produce pMHC-specific activation responses. Our work reveals how T cells can elicit tailored functional responses to diverse threats and how dysregulation of these responses may lead to immune pathologies.
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7
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Tsao HW, Kaminski J, Kurachi M, Barnitz RA, DiIorio MA, LaFleur MW, Ise W, Kurosaki T, Wherry EJ, Haining WN, Yosef N. Batf-mediated epigenetic control of effector CD8 + T cell differentiation. Sci Immunol 2022; 7:eabi4919. [PMID: 35179948 DOI: 10.1126/sciimmunol.abi4919] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The response of naive CD8+ T cells to their cognate antigen involves rapid and broad changes to gene expression that are coupled with extensive chromatin remodeling, but the mechanisms governing these changes are not fully understood. Here, we investigated how these changes depend on the basic leucine zipper ATF-like transcription factor Batf, which is essential for the early phases of the process. Through genome scale profiling, we characterized the role of Batf in chromatin organization at several levels, including the accessibility of key regulatory regions, the expression of their nearby genes, and the interactions that these regions form with each other and with key transcription factors. We identified a core network of transcription factors that cooperated with Batf, including Irf4, Runx3, and T-bet, as indicated by their colocalization with Batf and their binding in regions whose accessibility, interactions, and expression of nearby genes depend on Batf. We demonstrated the synergistic activity of this network by overexpressing the different combinations of these genes in fibroblasts. Batf and Irf4, but not Batf alone, were sufficient to increase accessibility and transcription of key loci, normally associated with T cell function. Addition of Runx3 and T-bet further contributed to fine-tuning of these changes and was essential for establishing chromatin loops characteristic of T cells. These data provide a resource for studying the epigenomic and transcriptomic landscape of effector differentiation of cytotoxic T cells and for investigating the interdependency between transcription factors and its effects on the epigenome and transcriptome of primary cells.
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Affiliation(s)
- Hsiao-Wei Tsao
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA.,Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - James Kaminski
- Center for Computational Biology, University of California, Berkeley, Berkeley, CA, USA
| | - Makoto Kurachi
- Department of Molecular Genetics, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - R Anthony Barnitz
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Michael A DiIorio
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA
| | - Martin W LaFleur
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA.,Evergrande Center for Immunologic Diseases, Harvard Medical School and Brigham and Women's Hospital, Boston, MA, USA.,Division of Medical Sciences, Harvard Medical School, Boston, MA, USA.,Department of Microbiology and Immunobiology, Harvard Medical School, Boston, MA, USA
| | - Wataru Ise
- Laboratory of Lymphocyte Differentiation, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan
| | - Tomohiro Kurosaki
- Laboratory of Lymphocyte Differentiation, WPI Immunology Frontier Research Center, Osaka University, Osaka, Japan.,Laboratory for Lymphocyte Differentiation, RIKEN Center for Integrative Medical Sciences, Kanagawa, Japan
| | - E John Wherry
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA.,Institute for Immunology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - W Nicholas Haining
- Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA, USA.,Broad Institute of MIT and Harvard, Cambridge, MA, USA.,Division of Pediatric Hematology and Oncology, Boston Children's Hospital, Boston, MA, USA
| | - Nir Yosef
- Center for Computational Biology, University of California, Berkeley, Berkeley, CA, USA.,Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology and Harvard University, Boston, MA, USA.,Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, Berkeley, CA, USA.,Chan Zuckerberg Biohub, San Francisco, CA, USA
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8
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Abdel-Hakeem MS, Manne S, Beltra JC, Stelekati E, Chen Z, Nzingha K, Ali MA, Johnson JL, Giles JR, Mathew D, Greenplate AR, Vahedi G, Wherry EJ. Epigenetic scarring of exhausted T cells hinders memory differentiation upon eliminating chronic antigenic stimulation. Nat Immunol 2021; 22:1008-1019. [PMID: 34312545 PMCID: PMC8323971 DOI: 10.1038/s41590-021-00975-5] [Citation(s) in RCA: 123] [Impact Index Per Article: 41.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 06/10/2021] [Indexed: 12/16/2022]
Abstract
Exhausted CD8 T cells (TEX) are a distinct state of T cell differentiation associated with failure to clear chronic viruses and cancer. Immunotherapies such as PD-1 blockade can reinvigorate TEX cells, but reinvigoration is not durable. A major unanswered question is whether TEX cells differentiate into functional durable memory T cells (TMEM) upon antigen clearance. Here, using a mouse model, we found that upon eliminating chronic antigenic stimulation, TEX cells partially (re)acquire phenotypic and transcriptional features of TMEM cells. These 'recovering' TEX cells originated from the T cell factor (TCF-1+) TEX progenitor subset. Nevertheless, the recall capacity of these recovering TEX cells remained compromised as compared to TMEM cells. Chromatin-accessibility profiling revealed a failure to recover core memory epigenetic circuits and maintenance of a largely exhausted open chromatin landscape. Thus, despite some phenotypic and transcriptional recovery upon antigen clearance, exhaustion leaves durable epigenetic scars constraining future immune responses. These results support epigenetic remodeling interventions for TEX cell-targeted immunotherapies.
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Affiliation(s)
- Mohamed S Abdel-Hakeem
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Microbiology and Immunology, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Sasikanth Manne
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Jean-Christophe Beltra
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Parker Institute for Cancer Immunotherapy at University of Pennsylvania, Philadelphia, PA, USA
| | - Erietta Stelekati
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Microbiology and Immunology, University of Miami, Miami, FL, USA
| | - Zeyu Chen
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Kito Nzingha
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Mohammed-Alkhatim Ali
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - John L Johnson
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Microbiology, University of Pennsylvania, Philadelphia, PA, USA
| | - Josephine R Giles
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Parker Institute for Cancer Immunotherapy at University of Pennsylvania, Philadelphia, PA, USA
| | - Divij Mathew
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Allison R Greenplate
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Golnaz Vahedi
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
- Department of Genetics, University of Pennsylvania, Philadelphia, PA, USA
- Penn Epigenetics Institute, University of Pennsylvania, Philadelphia, PA, USA
| | - E John Wherry
- Department of Systems Pharmacology and Translational Therapeutics, University of Pennsylvania, Philadelphia, PA, USA.
- Institute for Immunology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
- Parker Institute for Cancer Immunotherapy at University of Pennsylvania, Philadelphia, PA, USA.
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9
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Smyth M, Khamina K, Popa A, Gudipati V, Agerer B, Lercher A, Kosack L, Endler L, Baazim H, Viczenczova C, Huppa JB, Bergthaler A. Characterization of CD8 T Cell-Mediated Mutations in the Immunodominant Epitope GP33-41 of Lymphocytic Choriomeningitis Virus. Front Immunol 2021; 12:638485. [PMID: 34194424 PMCID: PMC8236698 DOI: 10.3389/fimmu.2021.638485] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2020] [Accepted: 05/25/2021] [Indexed: 11/13/2022] Open
Abstract
Cytotoxic T lymphocytes (CTLs) represent key immune effectors of the host response against chronic viruses, due to their cytotoxic response to virus-infected cells. In response to this selection pressure, viruses may accumulate escape mutations that evade CTL-mediated control. To study the emergence of CTL escape mutations, we employed the murine chronic infection model of lymphocytic choriomeningitis virus (LCMV). We developed an amplicon-based next-generation sequencing pipeline to detect low frequency mutations in the viral genome and identified non-synonymous mutations in the immunodominant LCMV CTL epitope, GP33-41, in infected wildtype mice. Infected Rag2-deficient mice lacking CTLs did not contain such viral mutations. By using transgenic mice with T cell receptors specific to GP33-41, we characterized the emergence of viral mutations in this epitope under varying selection pressure. We investigated the two most abundant viral mutations by employing reverse genetically engineered viral mutants encoding the respective mutations. These experiments provided evidence that these mutations prevent activation and expansion of epitope-specific CD8 T cells. Our findings on the mutational dynamics of CTL escape mutations in a widely-studied viral infection model contributes to our understanding of how chronic viruses interact with their host and evade the immune response. This may guide the development of future treatments and vaccines against chronic infections.
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Affiliation(s)
- Mark Smyth
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Kseniya Khamina
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Alexandra Popa
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Venugopal Gudipati
- Center for Pathophysiology, Infectiology and Immunology, Institute for Hygiene and Applied Immunology, Medical University of Vienna, Vienna, Austria
| | - Benedikt Agerer
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Alexander Lercher
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Lindsay Kosack
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Lukas Endler
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Hatoon Baazim
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Csilla Viczenczova
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
| | - Johannes B Huppa
- Center for Pathophysiology, Infectiology and Immunology, Institute for Hygiene and Applied Immunology, Medical University of Vienna, Vienna, Austria
| | - Andreas Bergthaler
- CeMM Research Center for Molecular Medicine of the Austrian Academy of Sciences, Vienna, Austria
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10
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Lai YP, Kuo LC, Lin BR, Lin HJ, Lin CY, Chen YT, Hsiao PW, Chang HT, Ko PCI, Chen HC, Chang HY, Lu J, Ho HN, Wu-Hsieh BA, Kung JT, Chen SC. CD28 engagement inhibits CD73-mediated regulatory activity of CD8 + T cells. Commun Biol 2021; 4:595. [PMID: 34011962 PMCID: PMC8134507 DOI: 10.1038/s42003-021-02119-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Accepted: 04/19/2021] [Indexed: 02/03/2023] Open
Abstract
CD28 is required for T cell activation as well as the generation of CD4+Foxp3+ Treg. It is unclear, however, how CD28 costimulation affects the development of CD8+ T cell suppressive function. Here, by use of Hepa1.6.gp33 in vitro killing assay and B16.gp33 tumor mouse model we demonstrate that CD28 engagement during TCR ligation prevents CD8+ T cells from becoming suppressive. Interestingly, our results showed that ectonucleotidase CD73 expression on CD8+ T cells is upregulated in the absence of CD28 costimulation. In both murine and human tumor-bearing hosts, CD73 is upregulated on CD28-CD8+ T cells that infiltrate the solid tumor. UPLC-MS/MS analysis revealed that CD8+ T cells activation without CD28 costimulation produces elevated levels of adenosine and that CD73 mediates its production. Adenosine receptor antagonists block CD73-mediated suppression. Our data support the notion that CD28 costimulation inhibits CD73 upregulation and thereby prevents CD8+ T cells from becoming suppressive. This study uncovers a previously unidentified role for CD28 costimulation in CD8+ T cell activation and suggests that the CD28 costimulatory pathway can be a potential target for cancer immunotherapy.
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Affiliation(s)
- Yo-Ping Lai
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Lu-Cheng Kuo
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Been-Ren Lin
- Division of Colorectal Surgery, Department of Surgery, National Taiwan University Hospital and College of Medicine, Taipei, Taiwan
| | - Hung-Ju Lin
- Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Chih-Yu Lin
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Yi-Ting Chen
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
| | - Pei-Wen Hsiao
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Huan-Tsung Chang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
| | - Patrick Chow-In Ko
- Department of Emergency Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Hsiao-Chin Chen
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan
| | - Hsiang-Yu Chang
- Department of Chemistry, National Taiwan University, Taipei, Taiwan
| | - Jean Lu
- Genomics Research Center, Academia Sinica, Taipei, Taiwan
- Department of Life Science, Tzu Chi University, Hualien, Taiwan
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
| | - Hong-Nerng Ho
- Department of Obstetrics and Gynecology, National Taiwan University, College of Medicine, Taipei, Taiwan
- Graduate Institute of Immunology, National Taiwan University, College of Medicine, Taipei, Taiwan
| | - Betty A Wu-Hsieh
- Graduate Institute of Immunology, National Taiwan University, College of Medicine, Taipei, Taiwan
| | - John T Kung
- Institute of Molecular Biology, Academia Sinica, Taipei, Taiwan
| | - Shu-Ching Chen
- Department of Medical Research, National Taiwan University Hospital, Taipei, Taiwan.
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11
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Tran CW, Gold MJ, Garcia-Batres C, Tai K, Elford AR, Himmel ME, Elia AJ, Ohashi PS. Hypoxia-inducible factor 1 alpha limits dendritic cell stimulation of CD8 T cell immunity. PLoS One 2020; 15:e0244366. [PMID: 33382742 PMCID: PMC7775062 DOI: 10.1371/journal.pone.0244366] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Accepted: 12/08/2020] [Indexed: 12/31/2022] Open
Abstract
Dendritic cells are sentinels of the immune system and represent a key cell in the activation of the adaptive immune response. Hypoxia-inducible factor 1 alpha (HIF-1α)–a crucial oxygen sensor stabilized during hypoxic conditions–has been shown to have both activating and inhibitory effects in immune cells in a context- and cell-dependent manner. Previous studies have demonstrated that in some immune cell types, HIF-1α serves a pro-inflammatory role. Genetic deletion of HIF-1α in macrophages has been reported to reduce their pro-inflammatory function. In contrast, loss of HIF-1α enhanced the pro-inflammatory activity of dendritic cells in a bacterial infection model. In this study, we aimed to further clarify the effects of HIF-1α in dendritic cells. Constitutive expression of HIF-1α resulted in diminished immunostimulatory capacity of dendritic cells in vivo, while conditional deletion of HIF-1α in dendritic cells enhanced their ability to induce a cytotoxic T cell response. HIF-1α-expressing dendritic cells demonstrated increased production of inhibitory mediators including IL-10, iNOS and VEGF, which correlated with their reduced capacity to drive effector CD8+ T cell function. Altogether, these data reveal that HIF-1α can promote the anti-inflammatory functions of dendritic cells and provides insight into dysfunctional immune responses in the context of HIF-1α activation.
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Affiliation(s)
- Charles W. Tran
- Princess Margaret Cancer Centre, Toronto, Ontario, Canada
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | | | | | - Kelly Tai
- Princess Margaret Cancer Centre, Toronto, Ontario, Canada
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | | | | | - Andrew J. Elia
- Princess Margaret Cancer Centre, Toronto, Ontario, Canada
| | - Pamela S. Ohashi
- Princess Margaret Cancer Centre, Toronto, Ontario, Canada
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
- * E-mail:
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12
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Anderson KG, Voillet V, Bates BM, Chiu EY, Burnett MG, Garcia NM, Oda SK, Morse CB, Stromnes IM, Drescher CW, Gottardo R, Greenberg PD. Engineered Adoptive T-cell Therapy Prolongs Survival in a Preclinical Model of Advanced-Stage Ovarian Cancer. Cancer Immunol Res 2019; 7:1412-1425. [PMID: 31337659 DOI: 10.1158/2326-6066.cir-19-0258] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 05/29/2019] [Accepted: 07/19/2019] [Indexed: 01/01/2023]
Abstract
Adoptive T-cell therapy using high-affinity T-cell receptors (TCR) to target tumor antigens has potential for improving outcomes in high-grade serous ovarian cancer (HGSOC) patients. Ovarian tumors develop a hostile, multicomponent tumor microenvironment containing suppressive cells, inhibitory ligands, and soluble factors that facilitate evasion of antitumor immune responses. Developing and validating an immunocompetent mouse model of metastatic ovarian cancer that shares antigenic and immunosuppressive qualities of human disease would facilitate establishing effective T-cell therapies. We used deep transcriptome profiling and IHC analysis of human HGSOC tumors and disseminated mouse ID8VEGF tumors to compare immunologic features. We then evaluated the ability of CD8 T cells engineered to express a high-affinity TCR specific for mesothelin, an ovarian cancer antigen, to infiltrate advanced ID8VEGF murine ovarian tumors and control tumor growth. Human CD8 T cells engineered to target mesothelin were also evaluated for ability to kill HLA-A2+ HGSOC lines. IHC and gene-expression profiling revealed striking similarities between tumors of both species, including processing/presentation of a leading candidate target antigen, suppressive immune cell infiltration, and expression of molecules that inhibit T-cell function. Engineered T cells targeting mesothelin infiltrated mouse tumors but became progressively dysfunctional and failed to persist. Treatment with repeated doses of T cells maintained functional activity, significantly prolonging survival of mice harboring late-stage disease at treatment onset. Human CD8 T cells engineered to target mesothelin were tumoricidal for three HGSOC lines. Treatment with engineered T cells may have clinical applicability in patients with advanced-stage HGSOC.
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MESH Headings
- Animals
- Antigens, Neoplasm/genetics
- Antigens, Neoplasm/immunology
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- Cell Line, Tumor
- Cytotoxicity, Immunologic
- Disease Models, Animal
- Female
- GPI-Linked Proteins/genetics
- GPI-Linked Proteins/immunology
- Gene Expression
- Gene Expression Profiling
- Genetic Engineering
- HLA-A Antigens/genetics
- HLA-A Antigens/immunology
- Humans
- Immunophenotyping
- Immunotherapy, Adoptive/adverse effects
- Immunotherapy, Adoptive/methods
- Mesothelin
- Mice
- Neoplasm Grading
- Neoplasm Staging
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/mortality
- Ovarian Neoplasms/pathology
- Ovarian Neoplasms/therapy
- Prognosis
- Receptors, Antigen, T-Cell/genetics
- Receptors, Antigen, T-Cell/metabolism
- Receptors, Chimeric Antigen/genetics
- Receptors, Chimeric Antigen/metabolism
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- Treatment Outcome
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Kristin G Anderson
- Department of Immunology, University of Washington School of Medicine, Seattle, Washington
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Valentin Voillet
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Breanna M Bates
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Edison Y Chiu
- Department of Immunology, University of Washington School of Medicine, Seattle, Washington
| | - Madison G Burnett
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Nicolas M Garcia
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Shannon K Oda
- Department of Immunology, University of Washington School of Medicine, Seattle, Washington
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Christopher B Morse
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
- Department of Obstetrics and Gynecology, Division of Gynecologic Oncology, University of Washington School of Medicine, Seattle, Washington
| | - Ingunn M Stromnes
- Department of Immunology, University of Washington School of Medicine, Seattle, Washington
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Charles W Drescher
- Public Health Sciences Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Raphael Gottardo
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
| | - Philip D Greenberg
- Department of Immunology, University of Washington School of Medicine, Seattle, Washington.
- Clinical Research Division, Fred Hutchinson Cancer Research Center, Seattle, Washington
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13
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Huang Z, Zak J, Pratumchai I, Shaabani N, Vartabedian VF, Nguyen N, Wu T, Xiao C, Teijaro JR. IL-27 promotes the expansion of self-renewing CD8 + T cells in persistent viral infection. J Exp Med 2019; 216:1791-1808. [PMID: 31164392 PMCID: PMC6683984 DOI: 10.1084/jem.20190173] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 04/04/2019] [Accepted: 05/07/2019] [Indexed: 12/21/2022] Open
Abstract
CXCR5+ TCF1+ CD8+ T cells sustain responses during persistent viral infection and mediate the proliferative burst following anti-PD1 treatment. Huang et al. show that IL-27 supports rapid division of these cells by competing with type 1 interferon for STAT1, driving IRF1 expression and preventing cell death. Chronic infection and cancer are associated with suppressed T cell responses in the presence of cognate antigen. Recent work identified memory-like CXCR5+ TCF1+ CD8+ T cells that sustain T cell responses during persistent infection and proliferate upon anti-PD1 treatment. Approaches to expand these cells are sought. We show that blockade of interferon type 1 (IFN-I) receptor leads to CXCR5+ CD8+ T cell expansion in an IL-27– and STAT1-dependent manner. IFNAR1 blockade promoted accelerated cell division and retention of TCF1 in virus-specific CD8+ T cells. We found that CD8+ T cell–intrinsic IL-27 signaling safeguards the ability of TCF1hi cells to maintain proliferation and avoid terminal differentiation or programmed cell death. Mechanistically, IL-27 endowed rapidly dividing cells with IRF1, a transcription factor that was required for sustained division in a cell-intrinsic manner. These findings reveal that IL-27 opposes IFN-I to uncouple effector differentiation from cell division and suggest that IL-27 signaling could be exploited to augment self-renewing T cells in chronic infections and cancer.
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Affiliation(s)
- Zhe Huang
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA
| | - Jaroslav Zak
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA
| | - Isaraphorn Pratumchai
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA.,Department of Chemical Immunology, Leiden University Medical Center, Leiden, Netherlands
| | - Namir Shaabani
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA
| | - Vincent F Vartabedian
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA
| | - Nhan Nguyen
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA
| | - Tuoqi Wu
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD
| | - Changchun Xiao
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA
| | - John R Teijaro
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA
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14
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Smith LK, Boukhaled GM, Condotta SA, Mazouz S, Guthmiller JJ, Vijay R, Butler NS, Bruneau J, Shoukry NH, Krawczyk CM, Richer MJ. Interleukin-10 Directly Inhibits CD8 + T Cell Function by Enhancing N-Glycan Branching to Decrease Antigen Sensitivity. Immunity 2018; 48:299-312.e5. [PMID: 29396160 DOI: 10.1016/j.immuni.2018.01.006] [Citation(s) in RCA: 163] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2017] [Revised: 09/01/2017] [Accepted: 01/02/2018] [Indexed: 01/29/2023]
Abstract
Chronic viral infections remain a global health concern. The early events that facilitate viral persistence have been linked to the activity of the immunoregulatory cytokine IL-10. However, the mechanisms by which IL-10 facilitates the establishment of chronic infection are not fully understood. Herein, we demonstrated that the antigen sensitivity of CD8+ T cells was decreased during chronic infection and that this was directly mediated by IL-10. Mechanistically, we showed that IL-10 induced the expression of Mgat5, a glycosyltransferase that enhances N-glycan branching on surface glycoproteins. Increased N-glycan branching on CD8+ T cells promoted the formation of a galectin 3-mediated membrane lattice, which restricted the interaction of key glycoproteins, ultimately increasing the antigenic threshold required for T cell activation. Our study identified a regulatory loop in which IL-10 directly restricts CD8+ T cell activation and function through modification of cell surface glycosylation allowing the establishment of chronic infection.
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Affiliation(s)
- Logan K Smith
- Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada; Microbiome and Disease Tolerance Centre, McGill University, Montreal, QC, Canada
| | - Giselle M Boukhaled
- Department of Physiology, Rosalind and Morris Goodman Cancer Research Centre, McGill University, Montreal, QC, Canada
| | - Stephanie A Condotta
- Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada; Microbiome and Disease Tolerance Centre, McGill University, Montreal, QC, Canada
| | - Sabrina Mazouz
- Centre de Recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada; Department of Microbiology, Immunology and Infectiology, Université de Montréal, Montreal, QC, Canada
| | - Jenna J Guthmiller
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Rahul Vijay
- Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, USA
| | - Noah S Butler
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA; Department of Microbiology and Immunology, University of Iowa, Iowa City, IA, USA
| | - Julie Bruneau
- Centre de Recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada; Department of Family Medicine and Emergency Medicine, Université de Montréal, Montreal, QC, Canada
| | - Naglaa H Shoukry
- Centre de Recherche du Centre hospitalier de l'Université de Montréal (CRCHUM), Montreal, QC, Canada; Department of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Connie M Krawczyk
- Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada; Department of Physiology, Rosalind and Morris Goodman Cancer Research Centre, McGill University, Montreal, QC, Canada
| | - Martin J Richer
- Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada; Microbiome and Disease Tolerance Centre, McGill University, Montreal, QC, Canada.
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15
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Tran CW, Saibil SD, Le Bihan T, Hamilton SR, Lang KS, You H, Lin AE, Garza KM, Elford AR, Tai K, Parsons ME, Wigmore K, Vainberg MG, Penninger JM, Woodgett JR, Mak TW, Ohashi PS. Glycogen Synthase Kinase-3 Modulates Cbl-b and Constrains T Cell Activation. THE JOURNAL OF IMMUNOLOGY 2017; 199:4056-4065. [DOI: 10.4049/jimmunol.1600396] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 10/05/2017] [Indexed: 11/19/2022]
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16
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Becklund BR, Purton JF, Ramsey C, Favre S, Vogt TK, Martin CE, Spasova DS, Sarkisyan G, LeRoy E, Tan JT, Wahlus H, Bondi-Boyd B, Luther SA, Surh CD. The aged lymphoid tissue environment fails to support naïve T cell homeostasis. Sci Rep 2016; 6:30842. [PMID: 27480406 PMCID: PMC4969611 DOI: 10.1038/srep30842] [Citation(s) in RCA: 83] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Accepted: 06/16/2016] [Indexed: 12/05/2022] Open
Abstract
Aging is associated with a gradual loss of naïve T cells and a reciprocal increase in the proportion of memory T cells. While reduced thymic output is important, age-dependent changes in factors supporting naïve T cells homeostasis may also be involved. Indeed, we noted a dramatic decrease in the ability of aged mice to support survival and homeostatic proliferation of naïve T cells. The defect was not due to a reduction in IL-7 expression, but from a combination of changes in the secondary lymphoid environment that impaired naïve T cell entry and access to key survival factors. We observed an age-related shift in the expression of homing chemokines and structural deterioration of the stromal network in T cell zones. Treatment with IL-7/mAb complexes can restore naïve T cell homeostatic proliferation in aged mice. Our data suggests that homeostatic mechanisms that support the naïve T cell pool deteriorate with age.
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Affiliation(s)
- Bryan R Becklund
- Department of Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA.,Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Jared F Purton
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Chris Ramsey
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Stéphanie Favre
- Department of Biochemistry, Center for Immunity and Infection, University of Lausanne, 1066 Epalinges, Switzerland
| | - Tobias K Vogt
- Department of Biochemistry, Center for Immunity and Infection, University of Lausanne, 1066 Epalinges, Switzerland
| | - Christopher E Martin
- Department of Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA.,Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Darina S Spasova
- Department of Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA.,Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Gor Sarkisyan
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Eric LeRoy
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Joyce T Tan
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Heidi Wahlus
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Brea Bondi-Boyd
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Sanjiv A Luther
- Department of Biochemistry, Center for Immunity and Infection, University of Lausanne, 1066 Epalinges, Switzerland
| | - Charles D Surh
- Department of Developmental Immunology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, 92037, USA.,Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA, 92037, USA.,Academy of Immunology and Microbiology, Institute for Basic Science, Pohang, Republic of Korea.,Department of Integrative Biosciences and Biotechnology, Pohang University of Science and Technology, Pohang, Republic of Korea
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17
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Condotta SA, Khan SH, Rai D, Griffith TS, Badovinac VP. Polymicrobial Sepsis Increases Susceptibility to Chronic Viral Infection and Exacerbates CD8+ T Cell Exhaustion. THE JOURNAL OF IMMUNOLOGY 2015; 195:116-25. [PMID: 25980007 DOI: 10.4049/jimmunol.1402473] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 04/21/2015] [Indexed: 02/06/2023]
Abstract
Patients who survive sepsis display suppressed immune functions, often manifested as an increased susceptibility to secondary infections. Recently, using a cecal-ligation and puncture (CLP) model of sepsis, we showed that sepsis induces substantial and long-lasting changes in the available naive CD8(+) T cell repertoire affecting the capacity of the host to respond to newly encountered acute infections. However, the extent to which sepsis changes the host susceptibility to chronic infection and affects CD8(+) T cell responses is currently unknown. In this study, we demonstrate that inbred and outbred mice recovering from a septic event are more susceptible to lymphocytic choriomeningitis virus (LCMV) clone-13 infection exhibited by mortality and viral burden. Primary virus-specific CD8(+) T cells in LCMV clone-13-infected septic mice displayed exacerbated CD8(+) T cell exhaustion illustrated by increased inhibitory molecule expression (e.g., programmed cell death 1, lymphocyte-activation gene 3, and 2B4) and diminished Ag-driven cytokine production (e.g., IFN-γ, TNF-α) compared with similarly infected sham-treated mice. Importantly, therapeutic inhibitory molecule dual blockade (anti-PD-L1 and anti-lymphocyte-activation gene 3) increased the number of circulating LCMV-specific CD8(+) T cells, and improved CD8(+) T cell function and pathogen control in chronically infected septic mice. Together, these results illustrate that polymicrobial sepsis compromises the overall health of the host leading to increased vulnerability to chronic infection and exacerbated CD8(+) T cell exhaustion. Collectively, our findings suggest that septic survivors may be more susceptible and at greater risk for developing exhaustible CD8(+) T cells upon encountering a subsequent chronic infection.
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Affiliation(s)
- Stephanie A Condotta
- Department of Pathology, University of Iowa Carver College of Medicine, Iowa City, IA 52242
| | - Shaniya H Khan
- Interdisciplinary Program in Immunology, University of Iowa Carver College of Medicine, Iowa City, IA 52242
| | - Deepa Rai
- Department of Pathology, University of Iowa Carver College of Medicine, Iowa City, IA 52242
| | - Thomas S Griffith
- Microbiology, Immunology and Cancer Biology Graduate Program, University of Minnesota Medical School, Minneapolis, MN 55455; Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455; Masonic Cancer Center, University of Minnesota Medical School, Minneapolis, MN 55455; Department of Urology, University of Minnesota Medical School, Minneapolis, MN 55455; and Minneapolis VA Health Care System, Minneapolis, MN 55417
| | - Vladimir P Badovinac
- Department of Pathology, University of Iowa Carver College of Medicine, Iowa City, IA 52242; Interdisciplinary Program in Immunology, University of Iowa Carver College of Medicine, Iowa City, IA 52242;
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RNAi-mediated TCR knockdown prevents autoimmunity in mice caused by mixed TCR dimers following TCR gene transfer. Mol Ther 2014; 22:1983-91. [PMID: 25048215 DOI: 10.1038/mt.2014.142] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 07/17/2014] [Indexed: 12/31/2022] Open
Abstract
Genetically modified T cells that express a transduced T cell receptor (TCR) α/β heterodimer in addition to their endogenous TCR are used in clinical studies to treat cancer. These cells express two TCR-α and two TCR-β chains that do not only compete for CD3 proteins but also form potentially self-reactive mixed TCR dimers, composed of endogenous and transferred chains. To overcome these deficits, we developed an RNAi-TCR replacement vector that simultaneously silences the endogenous TCR and expresses an RNAi-resistant TCR. Transduction of the virus-specific P14 TCR without RNAi resulted in unequal P14 TCR-α and -β chain surface levels, indicating heterodimerization with endogenous TCR chains. Such unequal expression was also observed following TCR gene optimization. Equal surface levels of the introduced TCR chains were however achieved by silencing the endogenous TCR. Importantly, all mice that received cells transduced with the native or optimized P14 TCR developed lethal TCR gene transfer-induced graft-versus-host-disease (TI-GVHD) due to formation of mixed TCR dimers. In contrast, TI-GVHD was almost completely prevented when using the RNAi-TCR replacement vector. Our data demonstrate that RNAi-assisted TCR replacement reduces the formation of mixed TCR dimers, and thereby significantly reduces the risk of TI-GVHD in TCR gene therapy.
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Li J, Figueira SK, Vrazo ACA, Binkowski BF, Butler BL, Tabata Y, Filipovich A, Jordan MB, Risma KA. Real-time detection of CTL function reveals distinct patterns of caspase activation mediated by Fas versus granzyme B. THE JOURNAL OF IMMUNOLOGY 2014; 193:519-28. [PMID: 24928990 DOI: 10.4049/jimmunol.1301668] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Activation of caspase-mediated apoptosis is reported to be a hallmark of both granzyme B- and Fas-mediated pathways of killing by CTLs; however, the kinetics of caspase activation remain undefined owing to an inability to monitor target cell-specific apoptosis in real time. We have overcome this limitation by developing a novel biosensor assay that detects continuous, protease-specific activity in target cells. Biosensors were engineered from a circularly permuted luciferase, linked internally by either caspase 3/7 or granzyme B/caspase 8 cleavage sites, thus allowing activation upon proteolytic cleavage by the respective proteases. Coincubation of murine CTLs with target cells expressing either type of biosensor led to a robust luminescent signal within minutes of cell contact. The signal was modulated by the strength of TCR signaling, the ratio of CTL/target cells, and the type of biosensor used. Additionally, the luciferase signal at 30 min correlated with target cell death, as measured by a (51)Cr-release assay. The rate of caspase 3/7 biosensor activation was unexpectedly rapid following granzyme B- compared with Fas-mediated signal induction in murine CTLs; the latter appeared gradually after a 90-min delay in perforin- or granzyme B-deficient CTLs. Remarkably, the Fas-dependent, caspase 3/7 biosensor signal induced by perforin-deficient human CTLs was also detectable after a 90-min delay when measured by redirected killing. Thus, we have used a novel, real-time assay to demonstrate the distinct pattern of caspase activation induced by granzyme B versus Fas in human and murine CTLs.
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Affiliation(s)
- Jinzhu Li
- Division of Allergy/Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | - Sarah K Figueira
- Division of Allergy/Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | - Alexandra C A Vrazo
- Division of Allergy/Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | | | | | - Yasuhiro Tabata
- Division of Bone Marrow Transplantation and Immune Deficiency, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | - Alexandra Filipovich
- Division of Bone Marrow Transplantation and Immune Deficiency, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267; and
| | - Michael B Jordan
- Division of Bone Marrow Transplantation and Immune Deficiency, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267; and Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229
| | - Kimberly A Risma
- Division of Allergy/Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267; and
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Stärck L, Popp K, Pircher H, Uckert W. Immunotherapy with TCR-Redirected T Cells: Comparison of TCR-Transduced and TCR-Engineered Hematopoietic Stem Cell–Derived T Cells. THE JOURNAL OF IMMUNOLOGY 2013; 192:206-13. [DOI: 10.4049/jimmunol.1202591] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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21
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Condotta SA, Rai D, James BR, Griffith TS, Badovinac VP. Sustained and incomplete recovery of naive CD8+ T cell precursors after sepsis contributes to impaired CD8+ T cell responses to infection. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2013; 190:1991-2000. [PMID: 23355736 PMCID: PMC3578009 DOI: 10.4049/jimmunol.1202379] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Patients who survive severe sepsis often display compromised immune function with impairment in innate and adaptive immune responses. These septic patients are highly susceptible to "secondary" infections with intracellular pathogens that are usually controlled by CD8(+) T cells. It is not known when and if this observed immunoparalysis of CD8(+) T cell immunity recovers, and the long-term consequences of sepsis on the ability of naive CD8(+) T cells to respond to subsequent infections are poorly understood. In this study, using the cecal-ligation and puncture mouse model of sepsis, we show that sepsis induces a rapid loss of naive CD8(+) T cells. However, IL-15-dependent numerical recovery is observed a month after initial septic insult. Numerical recovery is accompanied by IL-15-dependent phenotypic changes where a substantial proportion of naive (Ag-inexperienced) CD8(+) T cells display a "memory-like" phenotype (CD44(hi)/CD11a(hi)). Importantly, the impairment of naive CD8(+) T cells to respond to viral and bacterial infection was sustained for month(s) after sepsis induction. Incomplete recovery of naive CD8(+) T cell precursors was observed in septic mice, suggesting that the availability of naive precursors contributes to the sustained impairment in primary CD8(+) T cell responses. Thus, sepsis can result in substantial and long-lasting changes in the available CD8(+) T cell repertoire affecting the capacity of the host to respond to new infections.
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Affiliation(s)
| | - Deepa Rai
- Department of Pathology, University of Iowa, Iowa City, IA 52242
| | - Britnie R. James
- Microbiology, Immunology, and Cancer Biology Graduate Program, University of Minnesota, Minneapolis, MN 55455
| | - Thomas S. Griffith
- Microbiology, Immunology, and Cancer Biology Graduate Program, University of Minnesota, Minneapolis, MN 55455
- Center for Immunology, University of Minnesota, Minneapolis, MN 55455
- Department of Urology, University of Minnesota, Minneapolis, MN 55455
- Minneapolis VA Health Care System, Minneapolis, MN 55417
| | - Vladimir P. Badovinac
- Department of Pathology, University of Iowa, Iowa City, IA 52242
- Interdisciplinary Program in Immunology, University of Iowa, Iowa City, IA 52242
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Nicolò C, Di Sante G, Procoli A, Migliara G, Piermattei A, Valentini M, Delogu G, Cittadini A, Constantin G, Ria F. M tuberculosis in the adjuvant modulates time of appearance of CNS-specific effector T cells in the spleen through a polymorphic site of TLR2. PLoS One 2013; 8:e55819. [PMID: 23409051 PMCID: PMC3569447 DOI: 10.1371/journal.pone.0055819] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2012] [Accepted: 01/02/2013] [Indexed: 11/19/2022] Open
Abstract
DC deliver information regulating trafficking of effector T cells along T-cell priming. However, the role of pathogen-derived motives in the regulation of movement of T cells has not been studied. We hereinafter report that amount of M tuberculosis in the adjuvant modulates relocation of PLP139-151 specific T cells. In the presence of a low dose of M tuberculosis in the adjuvant, T cells (detected by CDR3 BV-BJ spectratyping, the so-called "immunoscope") mostly reach the spleen by day 28 after immunization ("late relocation") in the SJL strain, whereas T cells reach the spleen by d 14 with a high dose of M tuberculosis ("early relocation"). The C57Bl/6 background confers a dominant "early relocation" phenotype to F1 (SJL×C57Bl/6) mice, allowing early relocation of T cells in the presence of low dose M tuberculosis. A single non-synonymous polymorphism of TLR2 is responsible for "early/late" relocation phenotype. Egress of T lymphocytes is regulated by TLR2 expressed on T cells. Thus, pathogens engaging TLR2 on T cells regulate directly T-cell trafficking, and polymorphisms of TLR2 condition T-cell trafficking upon a limiting concentration of ligand.
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Affiliation(s)
- Chiara Nicolò
- Institute of General Pathology, Università Cattolica del S. Cuore, Rome, Italy
| | - Gabriele Di Sante
- Institute of General Pathology, Università Cattolica del S. Cuore, Rome, Italy
| | - Annabella Procoli
- Institute of Gynecology, Università Cattolica del S. Cuore, Rome, Italy
| | - Giuseppe Migliara
- Institute of General Pathology, Università Cattolica del S. Cuore, Rome, Italy
| | - Alessia Piermattei
- Institute of General Pathology, Università Cattolica del S. Cuore, Rome, Italy
| | | | - Giovanni Delogu
- Institute of Microbiology, Università Cattolica del S. Cuore, Rome, Italy
| | - Achille Cittadini
- Institute of General Pathology, Università Cattolica del S. Cuore, Rome, Italy
| | - Gabriela Constantin
- Section of General Pathology, Department of Pathology and Diagnostics, University of Verona, Verona, Italy
| | - Francesco Ria
- Institute of General Pathology, Università Cattolica del S. Cuore, Rome, Italy
- * E-mail:
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Mekker A, Tchang VS, Haeberli L, Oxenius A, Trkola A, Karrer U. Immune senescence: relative contributions of age and cytomegalovirus infection. PLoS Pathog 2012; 8:e1002850. [PMID: 22916013 PMCID: PMC3420944 DOI: 10.1371/journal.ppat.1002850] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2012] [Accepted: 06/15/2012] [Indexed: 01/11/2023] Open
Abstract
Immune senescence, defined as the age-associated dysregulation and dysfunction of the immune system, is characterised by impaired protective immunity and decreased efficacy of vaccines. Recent clinical, epidemiological and immunological studies suggest that Cytomegalovirus (CMV) infection may be associated with accelerated immune senescence, possibly by restricting the naïve T cell repertoire. However, direct evidence whether and how CMV-infection is implicated in immune senescence is still lacking. In this study, we have investigated whether latent mouse CMV (MCMV) infection with or without thymectomy (Tx) alters antiviral immunity of young and aged mice. After infection with lymphocytic choriomeningitis virus (LCMV) or Vaccinia virus, specific antiviral T cell responses were significantly reduced in old, old MCMV-infected and/or Tx mice compared to young mice. Importantly, control of LCMV replication was more profoundly impaired in aged MCMV-infected mice compared to age-matched MCMV-naïve or young mice. In addition, latent MCMV infection was associated with slightly reduced vaccination efficacy in old Tx mice. In contrast to the prevailing hypothesis of a CMV-mediated restriction of the naïve T cell repertoire, we found similar naïve T cell numbers in MCMV-infected and non-infected mice, whereas ageing and Tx clearly reduced the naïve T cell pool. Instead, MCMV-infection expanded the total CD8+ T cell pool by a massive accumulation of effector memory T cells. Based on these results, we propose a new model of increased competition between CMV-specific memory T cells and any ‘de novo’ immune response in aged individuals. In summary, our results directly demonstrate in a mouse model that latent CMV-infection impairs immunity in old age and propagates immune senescence. Cytomegalovirus (CMV) persistently infects 50–90% of the human population. After primary infection, constant immune surveillance is required to prevent CMV-related disease. During ageing, increasing T cell resources are expended to keep CMV under control. Recent human studies have suggested that this investment may come at the cost of accelerated immune senescence, a condition describing the age-associated decline of the immune system's functionality. In the present study, we have developed a mouse model to directly investigate whether and how CMV-infection might impair immunity of aged individuals. We demonstrate that old mice with long-lasting CMV-infection are more susceptible to viral infections than old mice without CMV since their virus specific T cell response is suppressed. Contrary to the prevailing hypothesis we found no indication for a CMV-associated shrinking of the naïve T cell compartment. Instead, CMV-infection precipitated a massive expansion of memory T cells. Thus, we propose an alternative mechanism of CMV-enhanced immune senescence based on T cell competition between CMV-specific memory T cells and de novo generated T cell responses. In summary, we provide the first direct evidence that CMV-infection is indeed a propagating factor for poor immunity in the elderly.
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Affiliation(s)
- Andrea Mekker
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, Zurich, Switzerland
- Molecular Life Science Graduate School, University of Zurich, Zurich, Switzerland
| | - Vincent S. Tchang
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, Zurich, Switzerland
| | - Lea Haeberli
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, Zurich, Switzerland
| | - Annette Oxenius
- Institute of Microbiology, Swiss Federal Institute of Technology (ETH) Zurich, HCI 4, Zurich, Switzerland
| | - Alexandra Trkola
- Institute of Medical Virology, University of Zurich, Zurich, Switzerland
| | - Urs Karrer
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital of Zurich, Zurich, Switzerland
- * E-mail:
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24
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Hansen AK, Regner M, Bonefeld CM, Boding L, Kongsbak M, Ødum N, Müllbacher A, Geisler C, von Essen MR. TCR down-regulation boosts T-cell-mediated cytotoxicity and protection against poxvirus infections. Eur J Immunol 2011; 41:1948-57. [PMID: 21590764 DOI: 10.1002/eji.201141413] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2011] [Revised: 03/16/2011] [Accepted: 04/21/2011] [Indexed: 11/12/2022]
Abstract
Cytotoxic T (Tc) cells play a key role in the defense against virus infections. Tc cells recognize infected cells via the T-cell receptor (TCR) and subsequently kill the target cells by one or more cytotoxic mechanisms. Induction of the cytotoxic mechanisms is finely tuned by the activation signals from the TCR. To determine whether TCR down-regulation affects the cytotoxicity of Tc cells, we studied TCR down-regulation-deficient CD3γLLAA mice. We found that Tc cells from CD3γLLAA mice have reduced cytotoxicity due to a specific deficiency in exocytosis of lytic granules. To determine whether this defect was reflected in an increased susceptibility to virus infections, we studied the course of ectromelia virus (ECTV) infection. We found that the susceptibility to ECTV infection was significantly increased in CD3γLLAA mice with a mortality rate almost as high as in granzyme B knock-out mice. Finally, we found that TCR signaling in CD3γLLAA Tc cells caused highly increased tyrosine phosphorylation and activation of the c-Cbl ubiquitin ligase, and that the impaired exocytosis of lytic granules could be rescued by the knockdown of c-Cbl. Thus, our work demonstrates that TCR down-regulation critically increases Tc cell cytotoxicity and protection against poxvirus infection.
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Affiliation(s)
- Ann K Hansen
- Department of International Health, Immunology and Microbiology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
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25
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Abstract
Individuals with impaired perforin-dependent cytotoxic function (Ctx(-)) develop a fatal inflammatory disorder called hemophagocytic lymphohistiocytosis (HLH). It has been hypothesized that immune hyperactivation during HLH is caused by heightened infection, defective apoptosis/responsiveness of Ctx(-) lymphocytes, or enhanced antigen presentation. Whereas clinical and experimental data suggest that increased T-cell activation drives HLH, potential abnormalities of T-cell activation have not been well characterized in Ctx(-) hosts. To define such abnormalities and to test these hypotheses, we assessed in vivo T-cell activation kinetics and viral loads after lymphocytic choriomeningitis virus (LCMV) infection of Ctx(-) mice. We found that increased T-cell activation occurred early during infection of Ctx(-) mice, while they had viral burdens that were identical to those of WT animals, demonstrating that T-cell hyperactivation was independent of viral load. Furthermore, cell transfer and signaling studies indicated that increased antigenic stimulation, not a cell-intrinsic defect of responsiveness, underlay heightened T-cell activation in vivo. Finally, direct measurement of viral antigen presentation demonstrated an increase in Ctx(-) mice that was proportional to abnormal T-cell activation. We conclude that perforin-dependent cytotoxicity has an immunoregulatory role that is distinguishable from its pathogen clearance function and limits T-cell activation in the physiologic context by suppressing antigen presentation.
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26
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Zediak VP, Johnnidis JB, Wherry EJ, Berger SL. Cutting edge: persistently open chromatin at effector gene loci in resting memory CD8+ T cells independent of transcriptional status. THE JOURNAL OF IMMUNOLOGY 2011; 186:2705-9. [PMID: 21278341 DOI: 10.4049/jimmunol.1003741] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Memory CD8(+) T cells are characterized by more rapid and robust effector function upon infection compared with naive T cells, but factors governing effector gene responsiveness are incompletely understood. We sought to understand transcriptional control of the effector genes IFN-γ (Ifng), granzyme B (Gzmb), and perforin 1 (Prf1) in murine memory CD8(+) T cells by characterizing their transcriptional profiles and chromatin states during lymphocytic choriomeningitis virus infection. Each effector gene has a distinct transcriptional profile in resting memory cells and following restimulation. Primary infection leads to reduced nucleosomal density near the transcription start sites and reduced H3K27 methylation throughout the Ifng and Gzmb loci, and these chromatin changes persist in the memory phase. Despite similarities in chromatin at the memory stage, PolII recruitment and continuous transcription occur at the Ifng locus but not the Gzmb locus. We propose that these chromatin changes poise effector genes for rapid upregulation, but are insufficient for PolII recruitment and transcription.
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Affiliation(s)
- Valerie P Zediak
- Department of Cell and Developmental Biology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
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27
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Boding L, Bonefeld CM, Nielsen BL, Lauritsen JPH, von Essen MR, Hansen AK, Larsen JM, Nielsen MM, Odum N, Geisler C. TCR down-regulation controls T cell homeostasis. THE JOURNAL OF IMMUNOLOGY 2009; 183:4994-5005. [PMID: 19801521 DOI: 10.4049/jimmunol.0901539] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
TCR and cytokine receptor signaling play key roles in the complex homeostatic mechanisms that maintain a relative stable number of T cells throughout life. Despite the homeostatic mechanisms, a slow decline in naive T cells is typically observed with age. The CD3gamma di-leucine-based motif controls TCR down-regulation and plays a central role in fine-tuning TCR expression and signaling in T cells. In this study, we show that the age-associated decline of naive T cells is strongly accelerated in CD3gammaLLAA knock-in mice homozygous for a double leucine to alanine mutation in the CD3gamma di-leucine-based motif, whereas the number of memory T cells is unaffected by the mutation. This results in premature T cell population senescence with a severe dominance of memory T cells and very few naive T cells in middle-aged to old CD3gamma mutant mice. The reduced number of naive T cells in CD3gamma mutant mice was caused by the combination of reduced thymic output, decreased T cell apoptosis, and increased transition of naive T cells to memory T cells. Experiments with bone marrow chimeric mice confirmed that the CD3gammaLLAA mutation exerted a T cell intrinsic effect on T cell homeostasis that resulted in an increased transition of CD3gammaLLAA naive T cells to memory T cells and a survival advantage of CD3gammaLLAA T cells compared with wild-type T cells. The experimental observations were further supported by mathematical modeling of T cell homeostasis. Our study thus identifies an important role of CD3gamma-mediated TCR down-regulation in T cell homeostasis.
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Affiliation(s)
- Lasse Boding
- Department of International Health, Immunology and Microbiology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
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Daubeuf S, Aucher A, Sampathkumar SG, Preville X, Yarema KJ, Hudrisier D. Chemical labels metabolically installed into the glycoconjugates of the target cell surface can be used to track lymphocyte/target cell interplay via trogocytosis: comparisons with lipophilic dyes and biotin. Immunol Invest 2008; 36:687-712. [PMID: 18161525 DOI: 10.1080/08820130701674596] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Trogocytosis, the process whereby lymphocytes capture membrane components from the cells they interact with, is classically evidenced by the transfer of fluorescent lipophilic compounds or biotinylated proteins from target cells to T or B cells. A particular class of molecules, not studied explicitly so far in the context of trogocytosis is glycoconjugates. Here, we used a method to metabolically install chemical labels in target cell glycoconjugates. Working with those target cells, we describe the conditions allowing CTL to be detected based on glycoconjugate trogocytosis triggered by antigen or stimulatory antibodies. Accordingly, we used this method to monitor the CTL response triggered in mice after vaccination. In addition, we documented the applicability of this approach to the detection of CD4(+) T and B cells. Overall, glycoconjugates were transferred between target cells and lymphocytes during trogocytosis with efficiencies comparable or higher than measured for biotinylated proteins or lipophilic dyes incorporated into general membrane lipids. From a technological point of view, our approach can be employed to detect reactive lymphocytes via glycoconjugate trogocytosis. More generally, we believe that the ever-growing ability to employ chemistry in living systems to label particular compounds will be powerful in unraveling the contributions of glycosylation to various aspects of T and B cells biology.
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Jost PJ, Weiss S, Ferch U, Gross O, Mak TW, Peschel C, Ruland J. Bcl10/Malt1 signaling is essential for TCR-induced NF-kappaB activation in thymocytes but dispensable for positive or negative selection. THE JOURNAL OF IMMUNOLOGY 2007; 178:953-60. [PMID: 17202357 DOI: 10.4049/jimmunol.178.2.953] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
During T cell development in the thymus, high-affinity/avidity TCR engagement induces negative selection by apoptosis, while lower affinity/avidity TCR interactions lead to positive selection and survival of thymocytes. Yet, the mechanisms that discriminate between positive and negative selection are not fully understood. One major regulator of survival and apoptosis in lymphoid cells is the transcription factor NF-kappaB. Several reports have indicated key roles for NF-kappaB in positive and negative selection. In peripheral T cells, TCR ligation activates NF-kappaB through a selective pathway that involves protein kinase Ctheta, Bcl10, and Malt1. While protein kinase Ctheta is dispensable for thymic TCR signaling, the molecular roles of Bcl10 and Malt1 in thymocytes have not been investigated. In the present study, we show that both Bcl10 and Malt1 are essential for TCR signaling in thymocytes as a genetic disruption of either molecule blocks TCR-induced NF-kappaB activation in these cells. To investigate the function of this pathway in thymic selection, we introduced the Bcl10 or Malt1 mutations into three well-established TCR transgenic mouse models. Surprisingly, using several in vivo or in vitro assays, we were unable to demonstrate a role for TCR-induced NF-kappaB activation in either positive or negative selection. Thus, while TCR signaling to NF-kappaB controls the activation of mature T cells, we suggest that this pathway is not involved in the positive or negative selection of thymocytes.
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Affiliation(s)
- Philipp J Jost
- Third Medical Department, Technical University of Munich, Klinikum rechts der Isar, Ismaninger Strasse 22, 81675 Munich, Germany
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Gu Y, Chae HD, Siefring JE, Jasti AC, Hildeman DA, Williams DA. RhoH GTPase recruits and activates Zap70 required for T cell receptor signaling and thymocyte development. Nat Immunol 2006; 7:1182-90. [PMID: 17028588 DOI: 10.1038/ni1396] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2006] [Accepted: 08/25/2006] [Indexed: 11/09/2022]
Abstract
RhoH is a hematopoietic-specific, GTPase-deficient member of the Rho GTPase family with unknown physiological function. Here we demonstrate that Rhoh-/- mice have impaired T cell receptor (TCR)-mediated thymocyte selection and maturation, resulting in T cell deficiency. RhoH deficiency resulted in defective CD3zeta phosphorylation, impaired translocation of the signaling molecule Zap70 to the immunological synapse and reduced activation of Zap70-mediated signaling in thymic and peripheral T cells. Proteomic analyses demonstrated that RhoH is a component of TCR signaling and is required for recruitment of Zap70 to the TCR through interaction with RhoH noncanonical immunoreceptor tyrosine-based activation motifs (ITAMs). In vivo reconstitution studies also demonstrated that RhoH function depends on phosphorylation of the RhoH ITAMs. These findings suggest that RhoH is a critical regulator of thymocyte development and TCR signaling by mediating recruitment and activation of Zap70.
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Affiliation(s)
- Yi Gu
- Division of Experimental Hematology, Cincinnati Children's Research Foundation and Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, Ohio 45229, USA.
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31
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Thompson LJ, Kolumam GA, Thomas S, Murali-Krishna K. Innate Inflammatory Signals Induced by Various Pathogens Differentially Dictate the IFN-I Dependence of CD8 T Cells for Clonal Expansion and Memory Formation. THE JOURNAL OF IMMUNOLOGY 2006; 177:1746-54. [PMID: 16849484 DOI: 10.4049/jimmunol.177.3.1746] [Citation(s) in RCA: 168] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Type-I IFNs (IFN-I) provide direct survival signals to T cells during Ag-driven proliferation. Because IFN-I production differs depending on the pathogen, we assessed CD8 T cell requirement for direct IFN-I signals during responses to vaccinia virus (VV), vesicular stomatitis virus (VSV), lymphocytic choriomeningitis virus (LCMV), and Listeria monocytogenes (LM) immunizations in vivo. IFN-I-receptor-deficient (IFN-IR(o)) CD8 T cells expanded 3- to 5-fold less and formed a diminished memory pool compared with wild-type (WT) CD8 T cells in response to VV, VSV, or LM. WT CD8 T cells expanded more robustly in response to LCMV-encoded Ags than to Ags encoded by the other three pathogens, and under these conditions the lack of direct IFN-I signals inhibited their expansion by approximately 100-fold. To test whether the high antigenic-load provided by LCMV caused greater expansion and greater IFN-I dependency, we primed WT and IFN-IR(o) OVA-specific OT-1 CD8 T cells with a fixed-number of OVA-peptide-pulsed dendritic cells along with adjuvant effect provided by LCMV, VV, VSV, or LM. Both WT and IFN-IR(o) OT-1 cells were recruited, proliferated, and differentiated into effectors in all the four cases. However, WT OT-1 cells expanded similarly in all four cases. IFN-IR(o) OT-1 cells expanded approximately 20-fold less than the WT OT-1 CD8 T cells when LCMV was used as adjuvant, whereas their expansion was affected only marginally when VV, VSV, or LM were used as adjuvants. Thus, innate/inflammatory signals induced by different pathogens contribute to CD8 T cell expansion and memory formation via distinct levels of IFN-I dependence.
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Affiliation(s)
- Lucas J Thompson
- Department of Immunology and Washington National Primate Center, University of Washington, 1959 Northeast Pacific Street, Seattle, WA 98195, USA
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McCoy KD, Harris NL, Diener P, Hatak S, Odermatt B, Hangartner L, Senn BM, Marsland BJ, Geuking MB, Hengartner H, Macpherson AJS, Zinkernagel RM. Natural IgE Production in the Absence of MHC Class II Cognate Help. Immunity 2006; 24:329-39. [PMID: 16546101 DOI: 10.1016/j.immuni.2006.01.013] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2005] [Revised: 12/14/2005] [Accepted: 01/12/2006] [Indexed: 12/13/2022]
Abstract
IgE induction by parasites and allergens is antigen driven and cognate T cell help dependent. We demonstrate that spontaneously produced IgE in T cell-deficient and germ-free wild-type (wt) mice is composed of natural specificities and induced by a mechanism independent of MHC class II (MHC II) cognate help. This does not require secondary lymphoid structures or germinal center formation, although some bystander T cell-derived IL-4 is necessary. The pathway of spontaneous IgE production is not inhibited by regulatory T cells and increases with age to constitute significant serum concentrations, even in naive animals.
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Affiliation(s)
- Kathy D McCoy
- Institute of Experimental Immunology, Department of Pathology, Universitätsspital, Schmelzbergstrasse 12, CH-8091 Zurich, Switzerland.
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33
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Puaux AL, Campanaud J, Salles A, Préville X, Timmerman B, Joly E, Hudrisier D. A very rapid and simple assay based on trogocytosis to detect and measure specific T and B cell reactivity by flow cytometry. Eur J Immunol 2006; 36:779-88. [PMID: 16482513 DOI: 10.1002/eji.200535407] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Detection, quantification, separation and characterization of T and B cells reactive to specific antigens are important tasks in both basic and clinical immunology. Here, we describe an approach allowing the performance of all four tasks on a functional basis by flow cytometry. The assay is based on the property of lymphocytes to capture membrane components from the cells they interact with, in a process we call trogocytosis. Working with CD8+ CTL and target cells labeled with membrane markers, we describe the conditions allowing reactive lymphocytes to be detected rapidly and inexpensively within mixed populations. Accordingly, we used this method to monitor the CTL response triggered in mice after vaccination. In addition, we documented the applicability of this method to the detection of antigen-specific CD4+ T and B cells. While our method is, for the time being, not as sensitive as staining of CTL with MHC class I multimers, it allows the simultaneous quantitative identification of reactive CD8+, CD4+ and B cells. Altogether, our method offers a simple and general alternative to other methods previously described to detect and quantify lymphocyte reactivity, and it can also be used in combination with those.
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34
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Cytotoxic T lymphocytes generated by short-term in vitro TCR stimulation in the presence of IL-4 are therapeutically effective against B16 melanoma. J Biomed Sci 2003. [DOI: 10.1007/bf02256315] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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35
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Bosc N, Lefranc MP. The mouse (Mus musculus) T cell receptor alpha (TRA) and delta (TRD) variable genes. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2003; 27:465-497. [PMID: 12697305 DOI: 10.1016/s0145-305x(03)00027-2] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
'The Mouse (Mus musculus) T cell receptor alpha (TRA) and delta (TRD) variable genes' 'IMGT Locus in Focus' report provides the first complete list of the mouse TRAV and TRDV genes which span 1550 kb on chromosome 14 at 19.7 cM. The total number of TRAV genes per haploid genome is 98 belonging to 23 subgroups. This includes 10 TRAV/DV genes which belong to seven subgroups. The functional TRAV genomic repertoire comprises 72-82 TRAV (including 9-10 TRAV/DV) belonging to 19 subgroups. The total number of TRDV genes per haploid genome is 16 (including the 10 TRAV/DV) belonging to 12 subgroups. The functional TRDV genomic repertoire comprises 14-15 genes (5 TRDV and 9-10 TRAV/DV) belonging to 11-12 subgroups. The eight tables and three figures of this report are available at the IMGT Marie-Paule page of IMGT. The international ImMunoGeneTics information system (http://imgt.cines.fr) created by Marie-Paule Lefranc, Université Montpellier II, CNRS, France.
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Affiliation(s)
- Nathalie Bosc
- IMGT, Laboratoire d'ImmunoGénétique Moléculaire (LIGM), Université Montpellier II, Institut de Génétique Humaine, UPR CNRS 1142, 141 rue de la Cardonille, 34396 5, Montpellier Cedex, France
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36
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Nguyen LT, Bachmann MF, Ohashi PS. Contribution of LCMV transgenic models to understanding T lymphocyte development, activation, tolerance, and autoimmunity. Curr Top Microbiol Immunol 2002; 263:119-43. [PMID: 11987812 DOI: 10.1007/978-3-642-56055-2_7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- L T Nguyen
- Department of Immunology, Ontario Cancer Institute, 610 University Avenue, Toronto, Ontario, Canada, M5G 2M9
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37
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Moody AM, Xiong Y, Chang HC, Reinherz EL. The CD8alphabeta co-receptor on double-positive thymocytes binds with differing affinities to the products of distinct class I MHC loci. Eur J Immunol 2001; 31:2791-9. [PMID: 11536178 DOI: 10.1002/1521-4141(200109)31:9<2791::aid-immu2791>3.0.co;2-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The CD8 co-receptor is essential for TCR-dependent immune recognition and T cell development involving peptides bound to MHC class I (MHCI) molecules. The dominant interaction of CD8 alpha alpha and alpha beta co-receptors is with the alpha3 domain of an MHCI molecule. Whether this interaction is different for the products of various MHCI loci is currently unknown. Here we examine the interaction between H-2K(b) and H-2D(b), the two MHCI molecules in the C57BL / 6 mouse, and CD8 using H-2K(b) and H-2D(b) tetramers. The MHCI molecules bind to the CD8alpha beta co-receptor on double-positive thymocytes with different avidities (H-2K(b) > D(b)). The differences are linked to their respective alpha3 domains. Hence, an H-2D(b)K(b) tetramer comprising D(b)alpha1--alpha2 and K(b)alpha3 domains shows more binding than H-2D(b). We also quantitated the monomeric affinities of CD8alpha alpha and CD8alpha beta for H-2K(b) and H-2D(b). The H-2K(b) interaction with CD8alpha alpha and CD8alpha beta is stronger than that of H-2D(b). Given that T cell repertoire selection of DP thymocytes is a function of both TCR-pMHCI and CD8alpha beta-pMHCI avidities, these differences may explain the dominant role of H-2K(b) as compared to H-2D(b) in CD8 T cell development of C57BL / 6 mice. The influence of allelic and non-allelic alpha3 polymorphisms on thymic selection processes are discussed.
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Affiliation(s)
- A M Moody
- Laboratory of Immunobiology, Department of Cancer Immunology & AIDS, Dana-Farber Cancer Institute and Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
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38
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Yannoutsos N, Wilson P, Yu W, Chen HT, Nussenzweig A, Petrie H, Nussenzweig MC. The role of recombination activating gene (RAG) reinduction in thymocyte development in vivo. J Exp Med 2001; 194:471-80. [PMID: 11514603 PMCID: PMC2193494 DOI: 10.1084/jem.194.4.471] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Assembly of T cell receptor (TCR)alpha/beta genes by variable/diversity/joining (V[D]J) rearrangement is an ordered process beginning with recombination activating gene (RAG) expression and TCRbeta recombination in CD4(-)CD8(-)CD25(+) thymocytes. In these cells, TCRbeta expression leads to clonal expansion, RAG downregulation, and TCRbeta allelic exclusion. At the subsequent CD4(+)CD8(+) stage, RAG expression is reinduced and V(D)J recombination is initiated at the TCRalpha locus. This second wave of RAG expression is terminated upon expression of a positively selected alpha/beta TCR. To examine the physiologic role of the second wave of RAG expression, we analyzed mice that cannot reinduce RAG expression in CD4(+)CD8(+) T cells because the transgenic locus that directs RAG1 and RAG2 expression in these mice is missing a distal regulatory element essential for reinduction. In the absence of RAG reinduction we find normal numbers of CD4(+)CD8(+) cells but a 50-70% reduction in the number of mature CD4(+)CD8(-) and CD4(-)CD8(+) thymocytes. TCRalpha rearrangement is restricted to the 5' end of the Jalpha cluster and there is little apparent secondary TCRalpha recombination. Comparison of the TCRalpha genes expressed in wild-type or mutant mice shows that 65% of all alpha/beta T cells carry receptors that are normally assembled by secondary TCRalpha rearrangement. We conclude that RAG reinduction in CD4(+)CD8(+) thymocytes is not required for initial TCRalpha recombination but is essential for secondary TCRalpha recombination and that the majority of TCRalpha chains expressed in mature T cells are products of secondary recombination.
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Affiliation(s)
- N Yannoutsos
- Laboratory of Molecular Immunology, The Rockefeller University, New York, NY 10021, USA.
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39
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Mauvieux L, Villey I, de Villartay JP. T early alpha (TEA) regulates initial TCRVAJA rearrangements and leads to TCRJA coincidence. Eur J Immunol 2001. [DOI: 10.1002/1521-4141(200107)31:7<2080::aid-immu2080>3.0.co;2-h] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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40
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Hudrisier D, Riond J, Mazarguil H, Gairin JE, Joly E. Cutting edge: CTLs rapidly capture membrane fragments from target cells in a TCR signaling-dependent manner. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 166:3645-9. [PMID: 11238601 DOI: 10.4049/jimmunol.166.6.3645] [Citation(s) in RCA: 168] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Upon encounter of a CTL with a target cell carrying foreign Ags, the TCR internalizes with its ligand, the peptide-MHC class I complex. However, it is unclear how this can happen mechanistically because MHC molecules are anchored to the target cell's surface via a transmembrane domain. By using antigenic peptides and lipids that were fluorescently labeled, we found that CTLs promptly capture target cell membranes together with the antigenic peptide as well as various other surface proteins. This efficient and specific capture process requires sustained TCR signaling. Our observations indicate that this process allows efficient acquisition of the Ag by CTL, which may in turn regulate lymphocyte activation or elimination.
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MESH Headings
- 3T3 Cells
- Animals
- Antigen Presentation
- Antigens, Viral
- Cell Membrane/immunology
- Cell Membrane/metabolism
- Cytotoxicity Tests, Immunologic
- Cytotoxicity, Immunologic
- Flow Cytometry
- Fluorescein-5-isothiocyanate/metabolism
- Glycoproteins/immunology
- Glycoproteins/metabolism
- Lymphocytic choriomeningitis virus/immunology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Knockout
- Mice, Transgenic
- Peptide Fragments/immunology
- Peptide Fragments/metabolism
- Receptors, Antigen, T-Cell/physiology
- Signal Transduction/immunology
- T-Lymphocytes, Cytotoxic/immunology
- T-Lymphocytes, Cytotoxic/metabolism
- Tumor Cells, Cultured
- Viral Proteins
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Affiliation(s)
- D Hudrisier
- Institut National de la Santé et de la Recherche Médicale, Unité 395, Centre Hospitalier Universitaire Purpan, BP3028, Toulouse, France.
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41
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Tissot AC, Pecorari F, Plückthun A. Characterizing the functionality of recombinant T-cell receptors in vitro: a pMHC tetramer based approach. J Immunol Methods 2000; 236:147-65. [PMID: 10699587 DOI: 10.1016/s0022-1759(99)00226-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
The very low affinity of the T-cell receptor (TCR) for the peptide-major histocompatibility complex (pMHC) has made it very challenging to design assays for testing the functionality of these molecules on small scales, which in turn has severely hampered the progress in developing expression and refolding methodologies for the TCR. We have now developed an ELISA assay for detecting pMHC binding to functional recombinant TCRs. It uses tetramers of biotinylated pMHCs bound to a neutravidin-horseradish peroxidase conjugate and detects the presence of functional TCR, bound in a productive orientation to an immobilized anti-Cbeta antibody. Specificity can be stringently demonstrated by inhibition with monomeric pMHCs. The assay is very sensitive and specific, and requires only very small amounts of protein. It has allowed us to study the unstable recombinant TCR P14, which we expressed and refolded from Escherichia coli. The TCR P14 is directed against the most abundant epitope of LCMV. We have confirmed the specificity of the interaction by BIAcore, and were able to determine the dissociation constant of the interaction of the P14 TCR and of the gp33-pMHC as 6 microM. This affinity ranks it among the tighter ones of TCR-pMHC interactions, and unusually low affinity thus does not seem to be the cause of the modest protective power of these T-cells, compared to others elicited in the anti-LCMV response. This strategy of multimerizing one partner and immobilizing the other in both a native form and productive orientation should be generally useful for characterizing the weak interactions of cell-surface molecules.
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Affiliation(s)
- A C Tissot
- Biochemisches Institut, Universität Zürich, Winterthurstrasse 190, CH-8057, Zürich, Switzerland
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42
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Pecorari F, Tissot AC, Plückthun A. Folding, heterodimeric association and specific peptide recognition of a murine alphabeta T-cell receptor expressed in Escherichia coli. J Mol Biol 1999; 285:1831-43. [PMID: 9917415 DOI: 10.1006/jmbi.1998.2422] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In a systematic study of the murine T-cell receptor UZ3-4, expressed and refolded from inclusion bodies in Escherichia coli, it was found that functional molecules can be obtained only under a very narrow set of conditions. The refolded T-cell receptor UZ3-4 specifically recognizes its cognate peptide (from mycobacterial Hsp60) in the context of H-2Db, but not another peptide bound to H-2Db, and the dissociation constant was determined by BIAcore as 10(-4) M. Using T-cell receptor constructs comprising all extracellular domains (ValphaCalpha and VbetaCbeta), found to be necessary for stability of the final product, significant amounts of native molecules were obtained only if the intermolecular Calpha-Cbeta disulfide bridge bond was deleted, even though the interaction between the complete alpha and beta-chain was determined to be very weak and fully reversible (KD approximately 10(-7) to 10(-6) M). Fusion of Jun and Fos to the constant domains also decreased the folding yield, because of premature association of intermediates leading to aggregation. Furthermore, only in a very narrow set of concentrations of oxidized and reduced glutathione, native disulfide bonds dominated. This shows that T-cell receptor domains are very prone to aggregation and misassociation during folding, compounded by incorrect disulfide bond formation. Once folded, however, the heterodimeric molecule is very stable and could be concentrated to millimolar concentration.
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Affiliation(s)
- F Pecorari
- Biochemisches Institut, Universität Zürich, Winterthurerstr. 190, Zürich, CH-8057, Switzerland
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43
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Abstract
Our understanding of virus-specific CD8(+) T cell responses is currently being revolutionized by peptide-based assay systems that allow flow cytometric analysis of effector and memory cytotoxic T lymphocyte populations. These techniques are, for the first time, putting the analysis of T-cell-mediated immunity on a quantitative basis.
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Affiliation(s)
- P C Doherty
- Department of Immunology, St Jude Children's Research Hospital, 332 North Lauderdale, Memphis, TN 38105, USA.
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44
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Dattamajumdar AK, Li SW, Jacobson DP, Ladiges W, Hood LE, Osman GE. Characterization of the mouse Tcra-V22 gene subfamily. Immunogenetics 1996; 44:432-40. [PMID: 8824154 DOI: 10.1007/bf02602804] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
T-cell receptors (Tcrs) of higher organisms play a key role in the specific recognition of self and non-self molecules in the immune system. The large number of Tcr variable (V) genes have been organized into V gene subfamilies according to their sequence similarity at the nucleotide and amino acid level. We cloned and characterized four new members of the Tcra-V22 gene subfamily at the genomic level using a simple and sensitive technique that can rapidly clone members of any multi-member gene family. Sequence analysis reveals that the four Tcra-V22 gene subfamily members have more than 98% sequence similarity in their coding regions, at the nucleotide and amino acid levels. However, the intron between the leader and the coding region varies up to 7% between members of the Tcra-V22 gene subfamily. Comparison of the multi-member Tcra-V22 gene subfamily with other multi-member Tcra-V gene subfamilies (V2, V8, and V11), shows that Tcra-V22 is unique in that it has multiple members with nearly identical amino acid sequence and which are not inherently pseudogenes. Sequence similarity analysis of the Tcra-V22 subfamily with the prototypes of all other Tcra-V subfamilies revealed that the Tcra-V22 subfamily has the closest sequence similarity to that of Tcra-V18 (77% at the nucleotide level and 71% at the amino acid level).
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Affiliation(s)
- A K Dattamajumdar
- Center for Bioengineering, University of Washington, Seattle, WA 98195, USA
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45
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Eshima K, Suzuki H, Yamazaki S, Shinohara N. Derivation of T-cell receptor alpha-chain double expresser lines from normal murine mature T cells. Immunology 1996; 87:205-12. [PMID: 8698381 PMCID: PMC1384275 DOI: 10.1046/j.1365-2567.1996.471534.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Because the T-cell receptor (TCR) alpha-chain locus is known to lack allelic exclusion of rearrangements, and as a recent report revealed the existence of alpha-chain double expressers among normal human peripheral blood lymphocytes (PBL), the possible existence of TCR alpha-chain double expressers among mature murine T cells was examined. Although two-colour staining analysis of normal T-cell populations did not immediately reveal recognizable clusters of V alpha double expressers, alternative in vitro stimulations of normal murine T cells with antibodies to two different TCR V alpha chains reproducibly induced TCR alpha-chain double-expresser lines. TCR complexes with different alpha-chains on such T cells were both shown to be functional. The cell lines were heterogeneous with respect to V beta usage and the ratio of the expressed amounts of the two alpha-chains on the surface. The ratio of the two expressed alpha-chains was found to be very stable over a long period of time. These results are consistent with the earlier report on alpha-chain double expressers among human T cells and also show normal occurrence of TCR alpha-chain double expressers in murine T-cell populations.
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MESH Headings
- Animals
- Antibodies, Monoclonal
- Cell Culture Techniques
- Cell Division/immunology
- Cell Line
- Cytotoxicity, Immunologic
- Exocytosis/immunology
- Flow Cytometry
- Mice
- Mice, Inbred C57BL
- Mice, Inbred Strains
- Receptors, Antigen, T-Cell, alpha-beta/analysis
- Receptors, Antigen, T-Cell, alpha-beta/immunology
- Spleen/immunology
- T-Lymphocyte Subsets/cytology
- T-Lymphocyte Subsets/immunology
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Affiliation(s)
- K Eshima
- Department of Applied Biological Chemistry, University of Tokyo, Japan
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46
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Arden B, Clark SP, Kabelitz D, Mak TW. Mouse T-cell receptor variable gene segment families. Immunogenetics 1995; 42:501-30. [PMID: 8550093 DOI: 10.1007/bf00172177] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
All mouse T-cell receptor alpha/delta, beta, and gamma variable (Tcra/d-, b-, and g-V) gene segments were aligned to compare the sequences with one another, to group them into subfamilies, and to derive a name which complies with the standard nomenclature. It was necessary to change the names of some V gene segments because they conflicted with those of other segments. The traditional classification into subfamilies was re-evaluated using a much larger pool of sequences. In the mouse, most V gene segments can be grouped into subfamilies of closely related genes with significantly less similarity between different subfamilies.
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MESH Headings
- Amino Acid Sequence
- Animals
- Base Sequence
- Mice
- Molecular Sequence Data
- Receptors, Antigen, T-Cell, alpha-beta/classification
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, gamma-delta/classification
- Receptors, Antigen, T-Cell, gamma-delta/genetics
- Sequence Alignment
- Terminology as Topic
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Affiliation(s)
- B Arden
- Paul-Ehrlich-Institute, Langen, Germany
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47
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Abstract
Recent experiments show that laboratory mice infected once with an influenza A virus or with the murine parainfluenza type 1 virus, called the Sendai virus, have enhanced numbers of cytotoxic T-lymphocyte precursors ( > 20x background) for life. Neither virus persists at the genome level, and the mice are maintained under conditions where there is no possibility of re-infection. These observations are highly relevant to any understanding of CD8+ cell memory and suggest that the clonal burst size associated with the primary challenge is a key determining factor.
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Affiliation(s)
- P C Doherty
- St Jude Children's Research Hospital, Memphis, Tennessee 38101-0318
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48
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Ewing C, Allan W, Daly K, Hou S, Cole GA, Doherty PC, Blackman MA. Virus-specific CD8+ T-cell responses in mice transgenic for a T-cell receptor beta chain selected at random. J Virol 1994; 68:3065-70. [PMID: 7908699 PMCID: PMC236796 DOI: 10.1128/jvi.68.5.3065-3070.1994] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The consequences of severely limiting the T-cell receptor (TCR) repertoire available for the response to intranasal infection with an influenza A virus or with Sendai virus have been analyzed by using H-2k mice (TG8.1) transgenic for a TCR beta-chain gene (V beta 8.1D beta 2J beta 2.3C beta 2). Analyzing the prevalence of V beta 8.1+ CD8+ T cells in lymph node cultures from nontransgenic (non-TG) H-2k controls primed with either virus and then stimulated in vitro with the homologous virus or with anti-CD3 epsilon showed that this TCR is not normally selected from the CD8+ T-cell repertoire during these infections. However, the TG8.1 mice cleared both viruses and generated virus-specific effector cytotoxic T lymphocytes (CTL) and memory CTL precursors, though the responses were delayed compared with the non-TG controls. Depletion of the CD4+ T-cell subset had little effect on the course of influenza virus infection but substantially slowed the development of the Sendai virus-specific CTL response and virus elimination in both the TG8.1 and non-TG mice, indicating that CD4+ helpers are promoting the CD8+ T-cell response in the Sendai virus model. Even so, restricting the available T-cell repertoire to lymphocytes expressing a single TCR beta chain still allows sufficient TCR diversity for CD8+ T cells (acting in the presence or absence of the CD4+ subset) to limit infection with an influenza A virus and a parainfluenza type 1 virus.
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Affiliation(s)
- C Ewing
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38101
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49
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Doherty PC, Hou S, Evans CF, Whitton JL, Oldstone MB, Blackman MA. Limiting the available T cell receptor repertoire modifies acute lymphocytic choriomeningitis virus-induced immunopathology. J Neuroimmunol 1994; 51:147-52. [PMID: 8182114 DOI: 10.1016/0165-5728(94)90076-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The invariably fatal immunopathological disease that follows intracerebral injection of CBA/Ca (H-2k) mice with 1000 PFU of lymphocytic choriomeningitis virus (LCMV) generally fails to develop in congenic mice transgenic for a V beta 8.1D beta 2J beta 2.3C beta 2 T cell receptor (TCR) gene. The majority of these LCMV-infected TCR-transgenic mice show a substantial meningitis of delayed onset, that resolves without causing any obvious clinical impairment. This inflammatory process depends on the involvement of V beta 8+ T cells, but does not require the participation of the CD4+ subset. The cytotoxic effectors that develop in both the transgenic mice and the CBA/Ca controls are lytic for target cells infected with a vaccinia construct expressing genes encoding the putative polymerase protein of LCMV. Limiting the available TCR repertoire to lymphocytes with a single V beta phenotype (not required for the generation of potent effectors in wild-type mice) thus modifies the development of the lethal neuropathology characteristic of LCMV infection, although the CD8+ cytotoxic T lymphocyte response is not greatly compromised.
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Affiliation(s)
- P C Doherty
- Department of Immunology, St Jude Children's Research Hospital, Memphis, TN 38105
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50
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Horwitz MS, Yanagi Y, Oldstone MB. T-cell receptors from virus-specific cytotoxic T lymphocytes recognizing a single immunodominant nine-amino-acid viral epitope show marked diversity. J Virol 1994; 68:352-7. [PMID: 7504738 PMCID: PMC236295 DOI: 10.1128/jvi.68.1.352-357.1994] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Following infection of the H-2d mouse by lymphocytic choriomeningitis virus, the newly generated cytotoxic T lymphocyte (CTL) response is focused to a single 9-amino-acid peptide sequence (epitope) of the virus. More than 96% of the primary, secondary, and clonal CTL respond to this lymphocytic choriomeningitis virus nucleoprotein epitope. This unique system affords the opportunity to evaluate the T-cell response to a single viral CTL epitope in a case in which the outcome of infection, either viral clearance or host death, is mediated by the CTLs. Specifically, the molecular structure of the T-cell receptors (TCRs) of CTLs responding to this epitope was analyzed. By using an anchored polymerase chain reaction, the TCR chains of three CTL clones cDNAs were amplified, sequenced, and found to have unique V alpha of V beta chains relative to each other as well as to lack restriction to any particular variable chain. These data indicate that the highly diverse antiviral CTL response is pleomorphic and probably provides an advantage to the host as it limits the emergence of viral variants that could more easily arise if the TCR response were homogeneous.
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Affiliation(s)
- M S Horwitz
- Department of Neuropharmacology, Scripps Research Institute, La Jolla, California 92037
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