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Jamaleddine H, Rogers D, Perreault G, Postat J, Patel D, Mandl JN, Khadra A. Chronic infection control relies on T cells with lower foreign antigen binding strength generated by N-nucleotide diversity. PLoS Biol 2024; 22:e3002465. [PMID: 38300945 PMCID: PMC10833529 DOI: 10.1371/journal.pbio.3002465] [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: 01/30/2023] [Accepted: 12/08/2023] [Indexed: 02/03/2024] Open
Abstract
The breadth of pathogens to which T cells can respond is determined by the T cell receptors (TCRs) present in an individual's repertoire. Although more than 90% of the sequence diversity among TCRs is generated by terminal deoxynucleotidyl transferase (TdT)-mediated N-nucleotide addition during V(D)J recombination, the benefit of TdT-altered TCRs remains unclear. Here, we computationally and experimentally investigated whether TCRs with higher N-nucleotide diversity via TdT make distinct contributions to acute or chronic pathogen control specifically through the inclusion of TCRs with lower antigen binding strengths (i.e., lower reactivity to peptide-major histocompatibility complex (pMHC)). When T cells with high pMHC reactivity have a greater propensity to become functionally exhausted than those of low pMHC reactivity, our computational model predicts a shift toward T cells with low pMHC reactivity over time during chronic, but not acute, infections. This TCR-affinity shift is critical, as the elimination of T cells with lower pMHC reactivity in silico substantially increased the time to clear a chronic infection, while acute infection control remained largely unchanged. Corroborating an affinity-centric benefit for TCR diversification via TdT, we found evidence that TdT-deficient TCR repertoires possess fewer T cells with weaker pMHC binding strengths in vivo and showed that TdT-deficient mice infected with a chronic, but not an acute, viral pathogen led to protracted viral clearance. In contrast, in the case of a chronic fungal pathogen where T cells fail to clear the infection, both our computational model and experimental data showed that TdT-diversified TCR repertoires conferred no additional protection to the hosts. Taken together, our in silico and in vivo data suggest that TdT-mediated TCR diversity is of particular benefit for the eventual resolution of prolonged pathogen replication through the inclusion of TCRs with lower foreign antigen binding strengths.
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Affiliation(s)
| | - Dakota Rogers
- Department of Physiology, McGill University, Montreal, Quebec, Canada
- McGill University Research Centre on Complex Traits, Montreal, Quebec, Canada
| | - Geneviève Perreault
- McGill University Research Centre on Complex Traits, Montreal, Quebec, Canada
| | - Jérémy Postat
- Department of Physiology, McGill University, Montreal, Quebec, Canada
- McGill University Research Centre on Complex Traits, Montreal, Quebec, Canada
| | - Dhanesh Patel
- Department of Physiology, McGill University, Montreal, Quebec, Canada
- McGill University Research Centre on Complex Traits, Montreal, Quebec, Canada
| | - Judith N. Mandl
- Department of Physiology, McGill University, Montreal, Quebec, Canada
- McGill University Research Centre on Complex Traits, Montreal, Quebec, Canada
- Department of Microbiology and Immunology, McGill University, Montreal, Quebec, Canada
| | - Anmar Khadra
- Department of Physiology, McGill University, Montreal, Quebec, Canada
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Kitaba NT, Knudsen GTM, Johannessen A, Rezwan FI, Malinovschi A, Oudin A, Benediktsdottir B, Martino D, González FJC, Gómez LP, Holm M, Jõgi NO, Dharmage SC, Skulstad SM, Watkins SH, Suderman M, Gómez-Real F, Schlünssen V, Svanes C, Holloway JW. Fathers' preconception smoking and offspring DNA methylation. Clin Epigenetics 2023; 15:131. [PMID: 37649101 PMCID: PMC10469907 DOI: 10.1186/s13148-023-01540-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Accepted: 07/24/2023] [Indexed: 09/01/2023] Open
Abstract
BACKGROUND Experimental studies suggest that exposures may impact respiratory health across generations via epigenetic changes transmitted specifically through male germ cells. Studies in humans are, however, limited. We aim to identify epigenetic marks in offspring associated with father's preconception smoking. METHODS We conducted epigenome-wide association studies (EWAS) in the RHINESSA cohort (7-50 years) on father's any preconception smoking (n = 875 offspring) and father's pubertal onset smoking < 15 years (n = 304), using Infinium MethylationEPIC Beadchip arrays, adjusting for offspring age, own smoking and maternal smoking. EWAS of maternal and offspring personal smoking were performed for comparison. Father's smoking-associated dmCpGs were checked in subpopulations of offspring who reported no personal smoking and no maternal smoking exposure. RESULTS Father's smoking commencing preconception was associated with methylation of blood DNA in offspring at two cytosine-phosphate-guanine sites (CpGs) (false discovery rate (FDR) < 0.05) in PRR5 and CENPP. Father's pubertal onset smoking was associated with 19 CpGs (FDR < 0.05) mapped to 14 genes (TLR9, DNTT, FAM53B, NCAPG2, PSTPIP2, MBIP, C2orf39, NTRK2, DNAJC14, CDO1, PRAP1, TPCN1, IRS1 and CSF1R). These differentially methylated sites were hypermethylated and associated with promoter regions capable of gene silencing. Some of these sites were associated with offspring outcomes in this cohort including ever-asthma (NTRK2), ever-wheezing (DNAJC14, TPCN1), weight (FAM53B, NTRK2) and BMI (FAM53B, NTRK2) (p < 0.05). Pathway analysis showed enrichment for gene ontology pathways including regulation of gene expression, inflammation and innate immune responses. Father's smoking-associated sites did not overlap with dmCpGs identified in EWAS of personal and maternal smoking (FDR < 0.05), and all sites remained significant (p < 0.05) in analyses of offspring with no personal smoking and no maternal smoking exposure. CONCLUSION Father's preconception smoking, particularly in puberty, is associated with offspring DNA methylation, providing evidence that epigenetic mechanisms may underlie epidemiological observations that pubertal paternal smoking increases risk of offspring asthma, low lung function and obesity.
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Affiliation(s)
- Negusse Tadesse Kitaba
- Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK
| | - Gerd Toril Mørkve Knudsen
- Department of Clinical Sciences, University of Bergen, Bergen, Norway
- Department of Occupational Medicine, Haukeland University Hospital, Bergen, Norway
| | - Ane Johannessen
- Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - Faisal I Rezwan
- Department of Computer Science, Aberystwyth University, Aberystwyth, UK
| | - Andrei Malinovschi
- Department of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
| | - Anna Oudin
- Section of Sustainable Health, Department of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
| | - Bryndis Benediktsdottir
- Department of Allergy, Respiratory Medicine and Sleep, Landspitali University Hospital, Reykjavik, Iceland
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - David Martino
- Wal-Yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, Australia
| | | | | | - Mathias Holm
- Occupational and Environmental Medicine, School of Public Health and Community Medicine, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Nils Oskar Jõgi
- Department of Clinical Sciences, University of Bergen, Bergen, Norway
- Department of Occupational Medicine, Haukeland University Hospital, Bergen, Norway
| | - Shyamali C Dharmage
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Melbourne, Australia
| | - Svein Magne Skulstad
- Department of Occupational Medicine, Haukeland University Hospital, Bergen, Norway
| | - Sarah H Watkins
- University of Bristol, MRC Integrative Epidemiology Unit, Population Health Sciences, Bristol Medical School, Bristol, UK
| | - Matthew Suderman
- University of Bristol, MRC Integrative Epidemiology Unit, Population Health Sciences, Bristol Medical School, Bristol, UK
| | - Francisco Gómez-Real
- Department of Clinical Sciences, University of Bergen, Bergen, Norway
- Department of Gynaecology and Obstetrics, Haukeland University Hospital, Bergen, Norway
| | - Vivi Schlünssen
- Department of Public Health, Work, Environment and Health, Danish Ramazzini Centre, Aarhus University Denmark, Aarhus, Denmark
- National Research Center for the Working Environment, Copenhagen, Denmark
| | - Cecilie Svanes
- Department of Occupational Medicine, Haukeland University Hospital, Bergen, Norway
- Centre for International Health, Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - John W Holloway
- Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, SO16 6YD, UK.
- NIHR Southampton Biomedical Research Center, University Hospitals Southampton, Southampton, UK.
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Rashu R, Ninkov M, Wardell CM, Benoit JM, Wang NI, Meilleur CE, D'Agostino MR, Zhang A, Feng E, Saeedian N, Bell GI, Vahedi F, Hess DA, Barr SD, Troyer RM, Kang CY, Ashkar AA, Miller MS, Haeryfar SMM. Targeting the MR1-MAIT cell axis improves vaccine efficacy and affords protection against viral pathogens. PLoS Pathog 2023; 19:e1011485. [PMID: 37384813 DOI: 10.1371/journal.ppat.1011485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Accepted: 06/14/2023] [Indexed: 07/01/2023] Open
Abstract
Mucosa-associated invariant T (MAIT) cells are MR1-restricted, innate-like T lymphocytes with tremendous antibacterial and immunomodulatory functions. Additionally, MAIT cells sense and respond to viral infections in an MR1-independent fashion. However, whether they can be directly targeted in immunization strategies against viral pathogens is unclear. We addressed this question in multiple wild-type and genetically altered but clinically relevant mouse strains using several vaccine platforms against influenza viruses, poxviruses and severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). We demonstrate that 5-(2-oxopropylideneamino)-6-D-ribitylaminouracil (5-OP-RU), a riboflavin-based MR1 ligand of bacterial origin, can synergize with viral vaccines to expand MAIT cells in multiple tissues, reprogram them towards a pro-inflammatory MAIT1 phenotype, license them to bolster virus-specific CD8+ T cell responses, and potentiate heterosubtypic anti-influenza protection. Repeated 5-OP-RU administration did not render MAIT cells anergic, thus allowing for its inclusion in prime-boost immunization protocols. Mechanistically, tissue MAIT cell accumulation was due to their robust proliferation, as opposed to altered migratory behavior, and required viral vaccine replication competency and Toll-like receptor 3 and type I interferon receptor signaling. The observed phenomenon was reproducible in female and male mice, and in both young and old animals. It could also be recapitulated in a human cell culture system in which peripheral blood mononuclear cells were exposed to replicating virions and 5-OP-RU. In conclusion, although viruses and virus-based vaccines are devoid of the riboflavin biosynthesis machinery that supplies MR1 ligands, targeting MR1 enhances the efficacy of vaccine-elicited antiviral immunity. We propose 5-OP-RU as a non-classic but potent and versatile vaccine adjuvant against respiratory viruses.
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Affiliation(s)
- Rasheduzzaman Rashu
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Marina Ninkov
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Christine M Wardell
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Jenna M Benoit
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Nicole I Wang
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Courtney E Meilleur
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Michael R D'Agostino
- McMaster Immunology Research Centre, McMaster University, Hamilton, Ontario, Canada
| | - Ali Zhang
- McMaster Immunology Research Centre, McMaster University, Hamilton, Ontario, Canada
| | - Emily Feng
- McMaster Immunology Research Centre, McMaster University, Hamilton, Ontario, Canada
| | - Nasrin Saeedian
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Gillian I Bell
- Krembil Centre for Stem Cell Biology, Molecular Medicine Research Laboratories, Robarts Research Institute, London, Ontario, Canada
| | - Fatemeh Vahedi
- McMaster Immunology Research Centre, McMaster University, Hamilton, Ontario, Canada
| | - David A Hess
- Krembil Centre for Stem Cell Biology, Molecular Medicine Research Laboratories, Robarts Research Institute, London, Ontario, Canada
- Department of Physiology and Pharmacology, Western University, London, Ontario, Canada
| | - Stephen D Barr
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Ryan M Troyer
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Chil-Yong Kang
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Ali A Ashkar
- McMaster Immunology Research Centre, McMaster University, Hamilton, Ontario, Canada
- Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Matthew S Miller
- McMaster Immunology Research Centre, McMaster University, Hamilton, Ontario, Canada
- Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada
- Michael G. DeGroote Institute for Infectious Disease Research, McMaster University, Hamilton, Ontario, Canada
| | - S M Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, Ontario, Canada
- Division of General Surgery, Department of Surgery, Western University, London, Ontario, Canada
- Lawson Health Research Institute, London, Ontario, Canada
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Trofimov A, Brouillard P, Larouche JD, Séguin J, Laverdure JP, Brasey A, Ehx G, Roy DC, Busque L, Lachance S, Lemieux S, Perreault C. Two types of human TCR differentially regulate reactivity to self and non-self antigens. iScience 2022; 25:104968. [PMID: 36111255 PMCID: PMC9468382 DOI: 10.1016/j.isci.2022.104968] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 06/24/2022] [Accepted: 08/12/2022] [Indexed: 11/30/2022] Open
Abstract
Based on analyses of TCR sequences from over 1,000 individuals, we report that the TCR repertoire is composed of two ontogenically and functionally distinct types of TCRs. Their production is regulated by variations in thymic output and terminal deoxynucleotidyl transferase (TDT) activity. Neonatal TCRs derived from TDT-negative progenitors persist throughout life, are highly shared among subjects, and are reported as disease-associated. Thus, 10%–30% of most frequent cord blood TCRs are associated with common pathogens and autoantigens. TDT-dependent TCRs present distinct structural features and are less shared among subjects. TDT-dependent TCRs are produced in maximal numbers during infancy when thymic output and TDT activity reach a summit, are more abundant in subjects with AIRE mutations, and seem to play a dominant role in graft-versus-host disease. Factors decreasing thymic output (age, male sex) negatively impact TCR diversity. Males compensate for their lower repertoire diversity via hyperexpansion of selected TCR clonotypes. Over 108 TCR CDR3 sequences from ∼103 individuals and 7 cohorts were analyzed The TCR repertoire is composed of two layers: neonatal and TDT-dependent layer ∼70% of frequent cord blood TCRs are associated with common pathogens Acute graft-vs-host disease correlates with a high proportion of TDT-dependent TCRs
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Affiliation(s)
- Assya Trofimov
- Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Department of Computer Science and Research Operations, Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Quebec Institute for Learning Algorithms (Mila), Montreal, Quebec H2S 3H1, Canada
- Currently Fred Hutchinson Cancer Center, Seattle, WA 98109, USA
- Currently Department of Physics, University of Washington, Seattle, WA 98195-1560, USA
| | - Philippe Brouillard
- Department of Computer Science and Research Operations, Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Quebec Institute for Learning Algorithms (Mila), Montreal, Quebec H2S 3H1, Canada
| | - Jean-David Larouche
- Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Department of Medicine, Université de Montréal, Montreal, Quebec H3C 3J7, Canada
| | - Jonathan Séguin
- Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montreal, Quebec H3C 3J7, Canada
| | - Jean-Philippe Laverdure
- Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montreal, Quebec H3C 3J7, Canada
| | - Ann Brasey
- Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada
| | - Gregory Ehx
- Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Currently Interdisciplinary Cluster for Applied Geno-Proteomics (GIGA-I3), University of Liege, Liege 4000, Belgium
| | | | - Lambert Busque
- Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada
| | - Silvy Lachance
- Department of Medicine, Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada
| | - Sébastien Lemieux
- Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Department of Computer Science and Research Operations, Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Department of Biochemistry at University of Montreal, Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Corresponding author
| | - Claude Perreault
- Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Department of Medicine, Université de Montréal, Montreal, Quebec H3C 3J7, Canada
- Maisonneuve-Rosemont Hospital, Montreal, Quebec H1T 2M4, Canada
- Corresponding author
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5
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Spared Nerve Injury Causes Sexually Dimorphic Mechanical Allodynia and Differential Gene Expression in Spinal Cords and Dorsal Root Ganglia in Rats. Mol Neurobiol 2021; 58:5396-5419. [PMID: 34331199 PMCID: PMC8497331 DOI: 10.1007/s12035-021-02447-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Accepted: 06/06/2021] [Indexed: 11/05/2022]
Abstract
Neuropathic pain is more prevalent in women. However, females are under-represented in animal experiments, and the mechanisms of sex differences remain inadequately understood. We used the spared nerve injury (SNI) model in rats to characterize sex differences in pain behaviour, unbiased RNA-Seq and proteomics to study the mechanisms. Male and female rats were subjected to SNI- and sham-surgery. Mechanical and cold allodynia were assessed. Ipsilateral lumbar dorsal root ganglia (DRG) and spinal cord (SC) segments were collected for RNA-seq analysis with DESeq2 on Day 7. Cerebrospinal fluid (CSF) samples for proteomic analysis and DRGs and SCs for analysis of IB-4 and CGRP, and IBA1 and GFAP, respectively, were collected on Day 21. Females developed stronger mechanical allodynia. There were no differences between the sexes in CGRP and IB-4 in the DRG or glial cell markers in the SC. No CSF protein showed change following SNI. DRG and SC showed abundant changes in gene expression. Sexually dimorphic responses were found in genes related to T-cells (cd28, ctla4, cd274, cd4, prf1), other immunological responses (dpp4, c5a, cxcr2 and il1b), neuronal transmission (hrh3, thbs4, chrna4 and pdyn), plasticity (atf3, c1qc and reg3b), and others (bhlhe22, mcpt1l, trpv6). We observed significantly stronger mechanical allodynia in females and numerous sexually dimorphic changes in gene expression following SNI in rats. Several genes have previously been linked to NP, while some are novel. Our results suggest gene targets for further studies in the development of new, possibly sex-specific, therapies for NP.
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Stutz R, Meyer C, Kaiser E, Goedicke-Fritz S, Schroeder HW, Bals R, Haertel C, Rogosch T, Kerzel S, Zemlin M. Attenuated asthma phenotype in mice with a fetal-like antigen receptor repertoire. Sci Rep 2021; 11:14199. [PMID: 34244568 PMCID: PMC8270943 DOI: 10.1038/s41598-021-93553-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 06/21/2021] [Indexed: 11/09/2022] Open
Abstract
We hypothesized that the scarcity of N-nucleotides might contribute to the inability of the neonate to mount a robust allergic immune response. To test this, we used terminal deoxyribunucleotidyl Transferase deficient (TdT-/-) mice, which express "fetal-like" T cell receptor and immunoglobulin repertoires with largely germline-encoded CDR3 regions. Intraperitoneal sensitization was followed by aerosol provocation with either PBS or the allergen OVA in both TdT-/- mice and wild-type mice to develop allergic respiratory inflammation. The effects of this procedure were investigated by lung function test, immunological analysis of serum and brochoalveolar lavage. The local TH2 cytokine milieu was significantly attenuated in TdT-/- mice. Within this group, the induction of total IgE levels was also significantly reduced after sensitization. TdT-/- mice showed a tendency toward reduced eosinophilic inflow into the bronchial tubes, which was associated with the elimination of respiratory hyperreactivity. In conclusion, in a murine model of allergic airway inflammation, the expression of fetal-like antigen receptors was associated with potent indications of a reduced ability to mount an asthma phenotype. This underlines the importance of somatically-generated antigen-receptor repertoire diversity in type one allergic immune responses and suggests that the fetus may be protected from allergic responses, at least in part, by controlling N addition.
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Affiliation(s)
- Regine Stutz
- Department of General Pediatrics and Neonatology, Saarland University Medical School, Homburg, Germany
| | - Christopher Meyer
- Department of General Pediatrics and Neonatology, Saarland University Medical School, Homburg, Germany
| | - Elisabeth Kaiser
- Department of General Pediatrics and Neonatology, Saarland University Medical School, Homburg, Germany
| | - Sybelle Goedicke-Fritz
- Department of General Pediatrics and Neonatology, Saarland University Medical School, Homburg, Germany.,Department of Pediatrics, Philipps-University Marburg, Marburg, Germany
| | - Harry W Schroeder
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Robert Bals
- Department of Internal Medicine V-Pulmonology, Allergology and Critical Care Medicine, Saarland University, Saarland University Medical School, Homburg, Germany
| | - Christoph Haertel
- Department of Pediatrics, Würzburg University Medical Center, Würzburg, Germany
| | - Tobias Rogosch
- Department of Pediatrics, Philipps-University Marburg, Marburg, Germany
| | - Sebastian Kerzel
- Department of Pediatrics, Philipps-University Marburg, Marburg, Germany.,Department of Pediatric Pneumology and Allergy, University Children's Hospital Regensburg, Campus St. Hedwig, Regensburg, Germany
| | - Michael Zemlin
- Department of General Pediatrics and Neonatology, Saarland University Medical School, Homburg, Germany. .,Department of Pediatrics, Philipps-University Marburg, Marburg, Germany.
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7
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Sun H, Lagarrigue F, Wang H, Fan Z, Lopez-Ramirez MA, Chang JT, Ginsberg MH. Distinct integrin activation pathways for effector and regulatory T cell trafficking and function. J Exp Med 2021; 218:e20201524. [PMID: 33104169 PMCID: PMC7590511 DOI: 10.1084/jem.20201524] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Revised: 09/17/2020] [Accepted: 09/22/2020] [Indexed: 12/19/2022] Open
Abstract
Integrin activation mediates lymphocyte trafficking and immune functions. Conventional T cell (Tconv cell) integrin activation requires Rap1-interacting adaptor molecule (RIAM). Here, we report that Apbb1ip-/- (RIAM-null) mice are protected from spontaneous colitis due to IL-10 deficiency, a model of inflammatory bowel disease (IBD). Protection is ascribable to reduced accumulation and homing of Tconv cells in gut-associated lymphoid tissue (GALT). Surprisingly, there are abundant RIAM-null regulatory T cells (T reg cells) in the GALT. RIAM-null T reg cells exhibit normal homing to GALT and lymph nodes due to preserved activation of integrins αLβ2, α4β1, and α4β7. Similar to Tconv cells, T reg cell integrin activation and immune function require Rap1; however, lamellipodin (Raph1), a RIAM paralogue, compensates for RIAM deficiency. Thus, in contrast to Tconv cells, RIAM is dispensable for T reg cell integrin activation and suppressive function. In consequence, inhibition of RIAM can inhibit spontaneous Tconv cell-mediated autoimmune colitis while preserving T reg cell trafficking and function.
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Affiliation(s)
- Hao Sun
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Frederic Lagarrigue
- Department of Medicine, University of California, San Diego, La Jolla, CA
- Institut de Pharmacologie et Biologie Structurale, Université de Toulouse, Centre National de la Recherche Scientifique, Université Paul Sabatier, Toulouse, France
| | - Hsin Wang
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Zhichao Fan
- Department of Immunology, School of Medicine, UConn Health, Farmington, CT
| | | | - John T. Chang
- Department of Medicine, University of California, San Diego, La Jolla, CA
| | - Mark H. Ginsberg
- Department of Medicine, University of California, San Diego, La Jolla, CA
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8
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Meilleur CE, Memarnejadian A, Shivji AN, Benoit JM, Tuffs SW, Mele TS, Singh B, Dikeakos JD, Topham DJ, Mu HH, Bennink JR, McCormick JK, Haeryfar SMM. Discordant rearrangement of primary and anamnestic CD8+ T cell responses to influenza A viral epitopes upon exposure to bacterial superantigens: Implications for prophylactic vaccination, heterosubtypic immunity and superinfections. PLoS Pathog 2020; 16:e1008393. [PMID: 32433711 PMCID: PMC7239382 DOI: 10.1371/journal.ppat.1008393] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 02/10/2020] [Indexed: 12/21/2022] Open
Abstract
Infection with (SAg)-producing bacteria may precede or follow infection with or vaccination against influenza A viruses (IAVs). However, how SAgs alter the breadth of IAV-specific CD8+ T cell (TCD8) responses is unknown. Moreover, whether recall responses mediating heterosubtypic immunity to IAVs are manipulated by SAgs remains unexplored. We employed wild-type (WT) and mutant bacterial SAgs, SAg-sufficient/deficient Staphylococcus aureus strains, and WT, mouse-adapted and reassortant IAV strains in multiple in vivo settings to address the above questions. Contrary to the popular view that SAgs delete or anergize T cells, systemic administration of staphylococcal enterotoxin B (SEB) or Mycoplasma arthritidis mitogen before intraperitoneal IAV immunization enlarged the clonal size of ‘select’ IAV-specific TCD8 and reshuffled the hierarchical pattern of primary TCD8 responses. This was mechanistically linked to the TCR Vβ makeup of the impacted clones rather than their immunodominance status. Importantly, SAg-expanded TCD8 retained their IFN-γ production and cognate cytolytic capacities. The enhancing effect of SEB on immunodominant TCD8 was also evident in primary responses to vaccination with heat-inactivated and live attenuated IAV strains administered intramuscularly and intranasally, respectively. Interestingly, in prime-boost immunization settings, the outcome of SEB administration depended strictly upon the time point at which this SAg was introduced. Accordingly, SEB injection before priming raised CD127highKLRG1low memory precursor frequencies and augmented the anamnestic responses of SEB-binding TCD8. By comparison, introducing SEB before boosting diminished recall responses to IAV-derived epitopes drastically and indiscriminately. This was accompanied by lower Ki67 and higher Fas, LAG-3 and PD-1 levels consistent with a pro-apoptotic and/or exhausted phenotype. Therefore, SAgs can have contrasting impacts on anti-IAV immunity depending on the naïve/memory status and the TCR composition of exposed TCD8. Finally, local administration of SEB or infection with SEB-producing S. aureus enhanced pulmonary TCD8 responses to IAV. Our findings have clear implications for superinfections and prophylactic vaccination. Exposure to bacterial superantigens (SAgs) is often a consequence of infection with common Gram-positive bacteria causing septic and toxic shock or food poisoning. How SAgs affect the magnitude, breadth and quality of infection/vaccine-elicited CD8+ T cell (TCD8) responses to respiratory viral pathogens, including influenza A viruses (IAVs), is far from clear. Also importantly, superinfections with IAVs and SAg-producing bacteria are serious clinical occurrences during seasonal and pandemic flu and require urgent attention. We demonstrate that two structurally distinct SAgs, including staphylococcal enterotoxin B (SEB), unexpectedly enhance primary TCD8 responses to ‘select’ IAV-derived epitopes depending on the TCR makeup of the responding clones. Intriguingly, the timing of exposure to SEB dictates the outcome of prime-boost immunization. Seeing a SAg before priming raises memory precursor frequencies and augments anamnestic TCD8 responses. Conversely, a SAg encounter before boosting renders TCD8 prone to death or exhaustion and impedes recall responses, thus likely compromising heterosubtypic immunity to IAVs. Finally, local exposure to SEB increases the pulmonary response of immunodominant IAV-specific TCD8. These findings shed new light on how bacterial infections and SAgs influence the effectiveness of anti-IAV TCD8 responses, and have, as such, wide-ranging implications for preventative vaccination and infection control.
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Affiliation(s)
- Courtney E. Meilleur
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Arash Memarnejadian
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Adil N. Shivji
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Jenna M. Benoit
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Stephen W. Tuffs
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - Tina S. Mele
- Division of General Surgery, Department of Surgery, Western University, London, Ontario, Canada
- Division of Critical Care Medicine, Department of Medicine, Western University, London, Ontario, Canada
| | - Bhagirath Singh
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Lawson Health Research Institute, London, Ontario, Canada
- Centre for Human Immunology, Western University, London, Ontario, Canada
| | - Jimmy D. Dikeakos
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
| | - David J. Topham
- David H. Smith Center for Vaccine Biology and Immunology, Department of Microbiology and Immunology, University of Rochester Medical Center, Rochester, New York, United States of America
| | - Hong-Hua Mu
- Division of Rheumatology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City, Utah, United States of America
| | - Jack R. Bennink
- Viral Immunology Section, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland, United States of America
| | - John K. McCormick
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Lawson Health Research Institute, London, Ontario, Canada
- Centre for Human Immunology, Western University, London, Ontario, Canada
| | - S. M. Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Ontario, Canada
- Division of General Surgery, Department of Surgery, Western University, London, Ontario, Canada
- Lawson Health Research Institute, London, Ontario, Canada
- Centre for Human Immunology, Western University, London, Ontario, Canada
- Division of Clinical Immunology & Allergy, Department of Medicine, Western University, London, Ontario, Canada
- * E-mail:
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9
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Meilleur CE, Wardell CM, Mele TS, Dikeakos JD, Bennink JR, Mu HH, McCormick JK, Haeryfar SMM. Bacterial Superantigens Expand and Activate, Rather than Delete or Incapacitate, Preexisting Antigen-Specific Memory CD8+ T Cells. J Infect Dis 2020; 219:1307-1317. [PMID: 30418594 DOI: 10.1093/infdis/jiy647] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 11/07/2018] [Indexed: 11/13/2022] Open
Abstract
Superantigens (SAgs) released by common Gram-positive bacterial pathogens have been reported to delete, anergize, or activate mouse T cells. However, little is known about their effects on preexisting memory CD8+ T cell (TCD8) pools. Furthermore, whether SAgs manipulate human memory TCD8 responses to cognate antigens is unknown. We used a human peripheral blood mononuclear cell culture system and a nontransgenic mouse model in which the impact of stimulation by two fundamentally distinct SAgs, staphylococcal enterotoxin B and Mycoplasma arthritidis mitogen, on influenza virus- and/or cytomegalovirus-specific memory TCD8 could be monitored. Bacterial SAgs surprisingly expanded antiviral memory TCD8 generated naturally through infection or artificially through vaccination. Mechanistically, this was a T cell-intrinsic and T cell receptor β-chain variable-dependent phenomenon. Importantly, SAg-expanded TCD8 displayed an effector memory phenotype and were capable of producing interferon-γ and destroying target cells ex vivo or in vivo. These findings have clear implications for antimicrobial defense and rational vaccine design.
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Affiliation(s)
- Courtney E Meilleur
- Department of Microbiology and Immunology, Western University, London, Canada
| | - Christine M Wardell
- Department of Microbiology and Immunology, Western University, London, Canada
| | - Tina S Mele
- Division of General Surgery, Department of Surgery, Western University, London, Canada.,Division of Critical Care Medicine, Western University, London, Canada
| | - Jimmy D Dikeakos
- Department of Microbiology and Immunology, Western University, London, Canada
| | - Jack R Bennink
- Viral Immunology Section, Division of Intramural Research, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, Maryland
| | - Hong-Hua Mu
- Division of Rheumatology, Department of Internal Medicine, University of Utah School of Medicine, Salt Lake City
| | - John K McCormick
- Department of Microbiology and Immunology, Western University, London, Canada.,Centre for Human Immunology, Western University, London, Canada.,Lawson Health Research Institute, London, Canada
| | - S M Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Canada.,Division of General Surgery, Department of Surgery, Western University, London, Canada.,Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, Canada.,Centre for Human Immunology, Western University, London, Canada.,Lawson Health Research Institute, London, Canada
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10
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Sun H, Kuk W, Rivera-Nieves J, Lopez-Ramirez MA, Eckmann L, Ginsberg MH. β7 Integrin Inhibition Can Increase Intestinal Inflammation by Impairing Homing of CD25 hiFoxP3 + Regulatory T Cells. Cell Mol Gastroenterol Hepatol 2019; 9:369-385. [PMID: 31707128 PMCID: PMC7016000 DOI: 10.1016/j.jcmgh.2019.10.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 10/28/2019] [Accepted: 10/30/2019] [Indexed: 12/11/2022]
Abstract
BACKGROUND & AIMS Integrin α4β7 mediates lymphocyte trafficking to the gut and gut-associated lymphoid tissues, a process critical for recruitment of effector lymphocytes from the circulation to the gut mucosa in inflammatory bowel disease (IBD) and murine models of intestinal inflammation. Antibody blockade of β7 integrins generally is efficacious in IBD; however, some patients fail to respond, and a few patients can experience exacerbations. This study examined the effects of loss of β7 integrin function in murine models of IBD. METHODS In a mouse IBD model caused by lack of interleukin 10, a cytokine important in CD25hiFoxP3+ regulatory T cell (Treg) function, genetic deletion of β7 integrin or antibody blockade of α4β7-mucosal addressin cell adhesion molecule-1 interaction paradoxically exacerbated colitis. RESULTS Loss of β7 impaired the capacity of Tregs homing to the gut and therefore suppress intestinal inflammation in an adoptive T-cell transfer model; however, the intrinsic suppressive function of β7-deficient Tregs remained intact, indicating that the β7 deficiency selectively impacts gut homing. Deletion of β7 integrin did not worsen colitis in an acute dextran sodium sulfate model in which Treg number and function were normal. CONCLUSIONS In Integrin subunit beta (Itgb)7-/-Il10-/- mice, loss of β7-dependent Treg homing to gut-associated lymphoid tissues combined with loss of intrinsic Treg function exacerbated intestinal inflammation. These results suggest that IBD patients with reduced CD25hiFoxP3+ Treg numbers or function or lack of interleukin 10 could be at risk for failure of α4β7 blocking therapy.
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Affiliation(s)
- Hao Sun
- Department of Medicine, University of California San Diego, La Jolla, California
| | - Wun Kuk
- Department of Medicine, University of California San Diego, La Jolla, California
| | - Jesús Rivera-Nieves
- Inflammatory Bowel Disease Center, University of California San Diego, La Jolla, California
| | | | - Lars Eckmann
- Division of Gastroenterology, University of California San Diego, La Jolla, California
| | - Mark H Ginsberg
- Department of Medicine, University of California San Diego, La Jolla, California.
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11
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Haeryfar SMM, Schell TD. PD-1/PD-L1 co-inhibition shapes anticancer T cell immunodominance: facing the consequences of an immunological ménage à trois. Cancer Immunol Immunother 2018; 67:1669-1672. [PMID: 30132082 PMCID: PMC11028081 DOI: 10.1007/s00262-018-2231-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 08/09/2018] [Indexed: 12/16/2022]
Abstract
PD-1- and PD-L1-blocking monoclonal antibodies have shown significant promise in clinical settings and rekindled the hope for successful cancer immunotherapy. We recently demonstrated that interfering with PD-1/PD-L1 signaling selectively augments CD8+ T cell (TCD8) responses to subdominant determinants (SDDs) of a model tumor antigen. This was likely due to decreased lysis of SDD-specific TCD8 by neighboring immunodominant clones co-engaging the same antigen-presenting cells (APCs). We therefore proposed that PD-1-based checkpoint inhibitors widen the range of tumor determinants that can be effectively targeted by TCD8. Subsequently and using different tumor models, Chen et al. reported, in Proceedings of the National Academy of Sciences of the United States of America, that PD-L1 protects APCs from the lytic function of immunodominant TCD8 and that PD-L1 blockade narrows, rather than broadens, the overall anticancer T cell response. Here, we briefly compare and contrast the experimental systems employed by the two groups, which may account, at least partially, for the opposing conclusions drawn. We argue that the pathway(s) of tumor antigen presentation, direct presentation versus cross-presentation, and the intensity of PD-1 expression by immunodominant and subdominant TCD8 must be taken into consideration in rational design of anti-PD-1/PD-L1-adjuvanted tumor vaccines and therapies.
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Affiliation(s)
- S M Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, 1151 Richmond Street, London, ON, N6A 5C1, Canada.
- Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, ON, N6A 5A5, Canada.
- Centre for Human Immunology, Western University, London, ON, N6A 5C1, Canada.
- Lawson Health Research Institute, London, ON, N6C 2R5, Canada.
| | - Todd D Schell
- Department of Microbiology and Immunology, Penn State Hershey College of Medicine, Hershey, PA, 17033, USA
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12
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Memarnejadian A, Meilleur CE, Shaler CR, Khazaie K, Bennink JR, Schell TD, Haeryfar SMM. PD-1 Blockade Promotes Epitope Spreading in Anticancer CD8 + T Cell Responses by Preventing Fratricidal Death of Subdominant Clones To Relieve Immunodomination. THE JOURNAL OF IMMUNOLOGY 2017; 199:3348-3359. [PMID: 28939757 DOI: 10.4049/jimmunol.1700643] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 08/26/2017] [Indexed: 12/15/2022]
Abstract
The interactions between programmed death-1 (PD-1) and its ligands hamper tumor-specific CD8+ T cell (TCD8) responses, and PD-1-based "checkpoint inhibitors" have shown promise in certain cancers, thus revitalizing interest in immunotherapy. PD-1-targeted therapies reverse TCD8 exhaustion/anergy. However, whether they alter the epitope breadth of TCD8 responses remains unclear. This is an important question because subdominant TCD8 are more likely than immunodominant clones to escape tolerance mechanisms and may contribute to protective anticancer immunity. We have addressed this question in an in vivo model of TCD8 responses to well-defined epitopes of a clinically relevant oncoprotein, large T Ag. We found that unlike other coinhibitory molecules (CTLA-4, LAG-3, TIM-3), PD-1 was highly expressed by subdominant TCD8, which correlated with their propensity to favorably respond to PD-1/PD-1 ligand-1 (PD-L1)-blocking Abs. PD-1 blockade increased the size of subdominant TCD8 clones at the peak of their primary response, and it also sustained their presence, thus giving rise to an enlarged memory pool. The expanded population was fully functional as judged by IFN-γ production and MHC class I-restricted cytotoxicity. The selective increase in subdominant TCD8 clonal size was due to their enhanced survival, not proliferation. Further mechanistic studies utilizing peptide-pulsed dendritic cells, recombinant vaccinia viruses encoding full-length T Ag or epitope mingenes, and tumor cells expressing T Ag variants revealed that anti-PD-1 invigorates subdominant TCD8 responses by relieving their lysis-dependent suppression by immunodominant TCD8 To our knowledge, our work constitutes the first report that interfering with PD-1 signaling potentiates epitope spreading in tumor-specific responses, a finding with clear implications for cancer immunotherapy and vaccination.
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Affiliation(s)
- Arash Memarnejadian
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada
| | - Courtney E Meilleur
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada
| | - Christopher R Shaler
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada
| | | | - Jack R Bennink
- Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Todd D Schell
- Department of Microbiology and Immunology, Pennsylvania State University, Hershey, PA 17033
| | - S M Mansour Haeryfar
- Department of Microbiology and Immunology, Western University, London, Ontario N6A 5C1, Canada; .,Division of Clinical Immunology and Allergy, Department of Medicine, Western University, London, Ontario N6G 5W9, Canada.,Centre for Human Immunology, Western University, London, Ontario N6A 5C1, Canada; and.,Lawson Health Research Institute, London, Ontario N6C 2R5, Canada
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13
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Flesch IEA, Hollett NA, Wong YC, Quinan BR, Howard D, da Fonseca FG, Tscharke DC. Extent of Systemic Spread Determines CD8+ T Cell Immunodominance for Laboratory Strains, Smallpox Vaccines, and Zoonotic Isolates of Vaccinia Virus. THE JOURNAL OF IMMUNOLOGY 2015. [PMID: 26195812 DOI: 10.4049/jimmunol.1402508] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
CD8(+) T cells that recognize virus-derived peptides presented on MHC class I are vital antiviral effectors. Such peptides presented by any given virus vary greatly in immunogenicity, allowing them to be ranked in an immunodominance hierarchy. However, the full range of parameters that determine immunodominance and the underlying mechanisms remain unknown. In this study, we show across a range of vaccinia virus strains, including the current clonal smallpox vaccine, that the ability of a strain to spread systemically correlated with reduced immunodominance. Reduction in immunodominance was observed both in the lymphoid system and at the primary site of infection. Mechanistically, reduced immunodominance was associated with more robust priming and especially priming in the spleen. Finally, we show this is not just a property of vaccine and laboratory strains of virus, because an association between virulence and immunodominance was also observed in isolates from an outbreak of zoonotic vaccinia virus that occurred in Brazil.
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Affiliation(s)
- Inge E A Flesch
- Research School of Biology, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Natasha A Hollett
- Research School of Biology, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Yik Chun Wong
- Research School of Biology, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Bárbara Resende Quinan
- Research School of Biology, Australian National University, Canberra, Australian Capital Territory 2601, Australia; Laboratório de Virologia Básica e Aplicada, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil; and
| | - Debbie Howard
- John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Flávio G da Fonseca
- Laboratório de Virologia Básica e Aplicada, Departamento de Microbiologia, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais 31270-901, Brazil; and
| | - David C Tscharke
- Research School of Biology, Australian National University, Canberra, Australian Capital Territory 2601, Australia; John Curtin School of Medical Research, Australian National University, Canberra, Australian Capital Territory 2601, Australia
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14
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Osuna CE, Gonzalez AM, Chang HH, Hung AS, Ehlinger E, Anasti K, Alam SM, Letvin NL. TCR affinity associated with functional differences between dominant and subdominant SIV epitope-specific CD8+ T cells in Mamu-A*01+ rhesus monkeys. PLoS Pathog 2014; 10:e1004069. [PMID: 24743648 PMCID: PMC3990730 DOI: 10.1371/journal.ppat.1004069] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2013] [Accepted: 02/28/2014] [Indexed: 01/18/2023] Open
Abstract
Many of the factors that contribute to CD8+ T cell immunodominance hierarchies during viral infection are known. However, the functional differences that exist between dominant and subdominant epitope-specific CD8+ T cells remain poorly understood. In this study, we characterized the phenotypic and functional differences between dominant and subdominant simian immunodeficiency virus (SIV) epitope-specific CD8+ T cells restricted by the major histocompatibility complex (MHC) class I allele Mamu-A*01 during acute and chronic SIV infection. Whole genome expression analyses during acute infection revealed that dominant SIV epitope-specific CD8+ T cells had a gene expression profile consistent with greater maturity and higher cytotoxic potential than subdominant epitope-specific CD8+ T cells. Flow-cytometric measurements of protein expression and anti-viral functionality during chronic infection confirmed these phenotypic and functional differences. Expression analyses of exhaustion-associated genes indicated that LAG-3 and CTLA-4 were more highly expressed in the dominant epitope-specific cells during acute SIV infection. Interestingly, only LAG-3 expression remained high during chronic infection in dominant epitope-specific cells. We also explored the binding interaction between peptide:MHC (pMHC) complexes and their cognate TCRs to determine their role in the establishment of immunodominance hierarchies. We found that epitope dominance was associated with higher TCR:pMHC affinity. These studies demonstrate that significant functional differences exist between dominant and subdominant epitope-specific CD8+ T cells within MHC-restricted immunodominance hierarchies and suggest that TCR:pMHC affinity may play an important role in determining the frequency and functionality of these cell populations. These findings advance our understanding of the regulation of T cell immunodominance and will aid HIV vaccine design.
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Affiliation(s)
- Christa E. Osuna
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
- Department of Environmental Health, Harvard School of Public Health, Boston, Massachusetts, United States of America
- * E-mail:
| | - Ana Maria Gonzalez
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Hsun-Hsien Chang
- Children's Hospital Informatics Program, Harvard-MIT Division of Health Sciences and Technology, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Amy Shi Hung
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Elizabeth Ehlinger
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Kara Anasti
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - S. Munir Alam
- Duke Human Vaccine Institute, Duke University School of Medicine, Durham, North Carolina, United States of America
- Department of Pathology, Duke University of Medicine, Durham, North Carolina, United States of America
| | - Norman L. Letvin
- Center for Virology and Vaccine Research, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, United States of America
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15
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Berdis AJ. DNA Polymerases That Perform Template-Independent DNA Synthesis. NUCLEIC ACID POLYMERASES 2014. [DOI: 10.1007/978-3-642-39796-7_5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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16
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Rudd BD, Venturi V, Smith NL, Nzingha K, Goldberg EL, Li G, Nikolich-Zugich J, Davenport MP. Acute neonatal infections 'lock-in' a suboptimal CD8+ T cell repertoire with impaired recall responses. PLoS Pathog 2013; 9:e1003572. [PMID: 24068921 PMCID: PMC3771883 DOI: 10.1371/journal.ppat.1003572] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2012] [Accepted: 07/07/2013] [Indexed: 11/28/2022] Open
Abstract
Microbial infection during various stages of human development produces widely different clinical outcomes, yet the links between age-related changes in the immune compartment and functional immunity remain unclear. The ability of the immune system to respond to specific antigens and mediate protection in early life is closely correlated with the level of diversification of lymphocyte antigen receptors. We have previously shown that the neonatal primary CD8+ T cell response to replication competent virus is significantly constricted compared to the adult response. In the present study, we have analyzed the subsequent formation of neonatal memory CD8+ T cells and their response to secondary infectious challenge. In particular, we asked whether the less diverse CD8+ T cell clonotypes that are elicited by neonatal vaccination with replication competent virus are ‘locked-in’ to the adult memory T cell, and thus may compromise the strength of adult immunity. Here we report that neonatal memory CD8+ T cells mediate poor recall responses compared to adults and are comprised of a repertoire of lower avidity T cells. During a later infectious challenge the neonatal memory CD8+ T cells compete poorly with the fully diverse repertoire of naïve adult CD8+ T cells and are outgrown by the adult primary response. This has important implications for the timing of vaccination in early life. Newborns typically have a heightened sensitivity to infectious diseases, the reasons for which are not yet well understood. One contributing factor is the limited diversity of lymphocyte receptors early in life to recognize antigen and control infection. We have previously shown that antigen-specific CD8+ T cell repertoires are significantly constricted in neonates compared with adults. In this study, we addressed the question of whether the developmental stage of the host at the time of vaccination influences the composition of the memory CD8+ T cell repertoire and its ability to mount a robust response to subsequent infections. We observed that the antigen-specific T cell repertoires elicited in the context of an acute neonatal infection, that are less diverse and comprised of lower-avidity T cells, are partially ‘locked-in’ to the adult memory T cell repertoire. However, in the face of a secondary infectious challenge, naïve adult T cells outcompete the lower avidity neonatal memory T cells and raise the diversity of the overall CD8+ T cell response. These results have potential implications for the design of vaccines to be administered in early life.
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MESH Headings
- Aging
- Animals
- Animals, Newborn
- CD8-Positive T-Lymphocytes/immunology
- CD8-Positive T-Lymphocytes/metabolism
- CD8-Positive T-Lymphocytes/pathology
- DNA, Recombinant/metabolism
- Herpes Simplex/immunology
- Herpes Simplex/prevention & control
- Herpes Simplex/virology
- Herpesvirus 1, Human/genetics
- Herpesvirus 1, Human/immunology
- Herpesvirus 1, Human/metabolism
- Immune System/growth & development
- Immune System/immunology
- Immune System/pathology
- Immunologic Deficiency Syndromes/etiology
- Immunologic Deficiency Syndromes/immunology
- Immunologic Deficiency Syndromes/metabolism
- Immunologic Deficiency Syndromes/pathology
- Immunologic Memory
- Listeria monocytogenes/genetics
- Listeria monocytogenes/immunology
- Listeria monocytogenes/metabolism
- Listeria monocytogenes/pathogenicity
- Listeriosis/immunology
- Listeriosis/microbiology
- Listeriosis/physiopathology
- Listeriosis/prevention & control
- Mice, Inbred Strains
- Models, Immunological
- Receptors, Antigen, T-Cell, alpha-beta/metabolism
- Specific Pathogen-Free Organisms
- Vaccines, Attenuated/adverse effects
- Vaccines, Attenuated/immunology
- Vaccinia/immunology
- Vaccinia/prevention & control
- Vaccinia/virology
- Vaccinia virus/genetics
- Vaccinia virus/immunology
- Vaccinia virus/metabolism
- Virulence
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Affiliation(s)
- Brian D. Rudd
- Department of Microbiology and Immunology, Cornell University, Ithaca, New York, United States of America
- * E-mail: (BDR); (JNZ); (MPD)
| | - Vanessa Venturi
- Computational Biology Group, Centre for Vascular Research, University of New South Wales, Kensington, New South Wales, Australia
| | - Norah L. Smith
- Department of Microbiology and Immunology, Cornell University, Ithaca, New York, United States of America
| | - Kito Nzingha
- Department of Microbiology and Immunology, Cornell University, Ithaca, New York, United States of America
| | - Emily L. Goldberg
- Department of Immunobiology and the Arizona Center on Aging, University of Arizona College of Medicine, Tucson, Arizona, and the BIO5 Institute, University of Arizona, Tucson, Arizona, United States of America
| | - Gang Li
- Department of Immunobiology and the Arizona Center on Aging, University of Arizona College of Medicine, Tucson, Arizona, and the BIO5 Institute, University of Arizona, Tucson, Arizona, United States of America
| | - Janko Nikolich-Zugich
- Department of Immunobiology and the Arizona Center on Aging, University of Arizona College of Medicine, Tucson, Arizona, and the BIO5 Institute, University of Arizona, Tucson, Arizona, United States of America
- * E-mail: (BDR); (JNZ); (MPD)
| | - Miles P. Davenport
- Complex Systems in Biology Group, Centre for Vascular Research, University of New South Wales, Kensington, New South Wales, Australia
- * E-mail: (BDR); (JNZ); (MPD)
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Lin LCW, Flesch IEA, Tscharke DC. Immunodomination during peripheral vaccinia virus infection. PLoS Pathog 2013; 9:e1003329. [PMID: 23633956 PMCID: PMC3635974 DOI: 10.1371/journal.ppat.1003329] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Accepted: 03/14/2013] [Indexed: 11/20/2022] Open
Abstract
Immunodominance is a fundamental property of CD8(+) T cell responses to viruses and vaccines. It had been observed that route of administration alters immunodominance after vaccinia virus (VACV) infection, but only a few epitopes were examined and no mechanism was provided. We re-visited this issue, examining a panel of 15 VACV epitopes and four routes, namely intradermal (i.d.), subcutaneous (s.c.), intraperitoneal (i.p.) and intravenous (i.v.) injection. We found that immunodominance is sharpened following peripheral routes of infection (i.d. and s.c.) compared with those that allow systemic virus dissemination (i.p. and i.v.). This increased immunodominance was demonstrated with native epitopes of VACV and with herpes simplex virus glycoprotein B when expressed from VACV. Responses to some subdominant epitopes were altered by as much as fourfold. Tracking of virus, examination of priming sites, and experiments restricting virus spread showed that priming of CD8(+) T cells in the spleen was necessary, but not sufficient to broaden responses. Further, we directly demonstrated that immunodomination occurs more readily when priming is mainly in lymph nodes. Finally, we were able to reduce immunodominance after i.d., but not i.p. infection, using a VACV expressing the costimulators CD80 (B7-1) and CD86 (B7-2), which is notable because VACV-based vaccines incorporating these molecules are in clinical trials. Taken together, our data indicate that resources for CD8(+) T cell priming are limiting in local draining lymph nodes, leading to greater immunodomination. Further, we provide evidence that costimulation can be a limiting factor that contributes to immunodomination. These results shed light on a possible mechanism of immunodomination and highlight the need to consider multiple epitopes across the spectrum of immunogenicities in studies aimed at understanding CD8(+) T cell immunity to viruses.
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Affiliation(s)
- Leon C. W. Lin
- Division of Biomedical Science and Biochemistry, Research School of Biology, The Australian National University, Canberra, Australian Capital Territory, Australia
| | - Inge E. A. Flesch
- Division of Biomedical Science and Biochemistry, Research School of Biology, The Australian National University, Canberra, Australian Capital Territory, Australia
| | - David C. Tscharke
- Division of Biomedical Science and Biochemistry, Research School of Biology, The Australian National University, Canberra, Australian Capital Territory, Australia
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Immunodominance: a pivotal principle in host response to viral infections. Clin Immunol 2012; 143:99-115. [PMID: 22391152 DOI: 10.1016/j.clim.2012.01.015] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 01/25/2012] [Accepted: 01/28/2012] [Indexed: 11/24/2022]
Abstract
We encounter pathogens on a daily basis and our immune system has evolved to mount an immune response following an infection. An interesting phenomenon that has evolved in response to clearing bacterial and viral infections is called immunodominance. Immunodominance refers to the phenomenon that, despite co-expression of multiple major histocompatibility complex class I alleles by host cells and the potential generation of hundreds of distinct antigenic peptides for recognition following an infection, a large portion of the anti-viral cytotoxic T lymphocyte population targets only some peptide/MHC class I complexes. Here we review the main factors contributing to immunodominance in relation to influenza A and HIV infection. Of special interest are the factors contributing to immunodominance in humans and rodents following influenza A infection. By critically reviewing these findings, we hope to improve understanding of the challenges facing the discovery of new factors enabling better anti-viral vaccine strategies in the future.
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Czernik A, Camilleri M, Pittelkow MR, Grando SA. Paraneoplastic autoimmune multiorgan syndrome: 20 years after. Int J Dermatol 2011; 50:905-14. [DOI: 10.1111/j.1365-4632.2011.04868.x] [Citation(s) in RCA: 81] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ramsden DA. Polymerases in nonhomologous end joining: building a bridge over broken chromosomes. Antioxid Redox Signal 2011; 14:2509-19. [PMID: 20649463 PMCID: PMC3113452 DOI: 10.1089/ars.2010.3429] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Repair of double-strand breaks in chromosomal DNA is essential. Unfortunately, a paradigm central to most DNA repair pathways--damaged DNA is replaced by polymerases, by using an intact, undamaged complementary strand as a template--no longer works. The nonhomologous end joining (NHEJ) pathway nevertheless still uses DNA polymerases to help repair double-strand breaks. Bacteria use a member of the archaeo-eukaryal primase superfamily, whereas eukaryotes use multiple members of the polymerase X family. These polymerases can, depending on the biologic context, accurately replace break-associated damage, mitigate loss of flanking DNA, or diversify products of repair. Polymerases specifically implicated in NHEJ are uniquely effective in these roles: relative to canonic polymerases, NHEJ polymerases have been engineered to do more with less.
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Affiliation(s)
- Dale A Ramsden
- Department of Biochemistry and Biophysics, Lineberger Comprehensive Cancer Center, and Curriculum in Genetics and Molecular Biology, University of North Carolina at Chapel Hill, NC 27599, USA.
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21
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Tatum AM, Watson AM, Schell TD. Direct presentation regulates the magnitude of the CD8+ T cell response to cell-associated antigen through prolonged T cell proliferation. THE JOURNAL OF IMMUNOLOGY 2010; 185:2763-72. [PMID: 20660711 DOI: 10.4049/jimmunol.0903920] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The magnitude and complexity of Ag-specific CD8(+) T cell responses is determined by intrinsic properties of the immune system and extrinsic factors, such as vaccination. We evaluated mechanisms that regulate the CD8(+) T cell response to two distinct determinants derived from the same protein Ag, SV40 T Ag (T Ag), following immunization of C57BL/6 mice with T Ag-transformed cells. The results show that direct presentation of T cell determinants by T Ag-transformed cells regulates the magnitude of the CD8(+) T cell response in vivo but not the immunodominance hierarchy. The immunodominance hierarchy was reversed in a dose-dependent manner by addition of excess naive T cells targeting the subdominant determinant. However, T cell competition played only a minor role in limiting T cell accumulation under physiological conditions. We found that the magnitude of the T cell response was regulated by the ability of T Ag-transformed cells to directly present the T Ag determinants. The hierarchy of the CD8(+) T cell response was maintained when Ag presentation in vivo was restricted to cross-presentation, but the presence of T Ag-transformed cells capable of direct presentation dramatically enhanced T cell accumulation at the peak of the response. This enhancement was due to a prolonged period of T cell proliferation, resulting in a delay in T cell contraction. Our findings reveal that direct presentation by nonprofessional APCs can dramatically enhance accumulation of CD8(+) T cells during the primary response, revealing a potential strategy to enhance vaccination approaches.
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Affiliation(s)
- Angela M Tatum
- Department of Microbiology and Immunology, The Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
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Mahmoud TI, Kearney JF. Terminal deoxynucleotidyl transferase is required for an optimal response to the polysaccharide α-1,3 dextran. THE JOURNAL OF IMMUNOLOGY 2009; 184:851-8. [PMID: 20018621 DOI: 10.4049/jimmunol.0902791] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
An understanding of Ab responses to polysaccharides associated with pathogenic microorganisms is of importance for improving vaccine design, especially in neonates that respond poorly to these types of Ags. In this study, we have investigated the role of the lymphoid-specific enzyme TdT in generating B cell clones responsive to alpha-1,3 dextran (DEX). TdT is a DNA polymerase that plays a major role in generating diversity of lymphocyte AgRs during V(D)J recombination. In this study, we show that the DEX-specific Ab response is lower, and the dominant DEX-specific J558 idiotype (Id) is not detected in TdT(-/-) mice when compared with wild-type (WT) BALB/c mice. Nucleotide sequencing of H chain CDR3s of DEX-specific plasmablasts, sorted postimmunization, showed that TdT(-/-) mice generate a lower frequency of the predominant adult molecularly determined clone J558. Complementation of TdT expression in TdT(-/-) mice by early forced expression of the short splice variant of TdT-restored WT proportions of J558 Id+ clones and also abrogated the development of the minor M104E Id+ clones. J558 Id V(D)J rearrangements are detected as early as 7 d after birth in IgM-negative B cell precursors in the liver and spleen of WT and TdT-transgenic mice but not in TdT(-/-) mice. These data show that TdT is essential for the generation of the predominant higher-affinity DEX-responsive J558 clone.
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Affiliation(s)
- Tamer I Mahmoud
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL 35294, USA
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Flesch IEA, Woo WP, Wang Y, Panchanathan V, Wong YC, La Gruta NL, Cukalac T, Tscharke DC. Altered CD8(+) T cell immunodominance after vaccinia virus infection and the naive repertoire in inbred and F(1) mice. THE JOURNAL OF IMMUNOLOGY 2009; 184:45-55. [PMID: 19949110 DOI: 10.4049/jimmunol.0900999] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Previous studies of CD8(+) T cell immunodominance after primary virus infection of F(1) mice compared with their inbred parents have generally concluded that no dramatic changes occur. In this study, we revisit this issue using vaccinia virus (VACV), which has a large genome, a recently defined immunodominance hierarchy in mice, and is a candidate vector for vaccines. We found that immunogenicity of VACV peptides defined using inbred mice was highly variable in F(1) progeny: some peptides were equally immunogenic in F(1) and inbred, whereas others elicited responses that were reduced by >90% in F(1) mice. Furthermore, the dominance of a peptide in the relevant inbred parent did not predict whether it would be poorly immunogenic in F(1) mice. This result held using F(1) hybrids of MHC-congenic mice, suggesting that MHC differences alone were responsible. It was also extended to foreign epitopes expressed by an rVACV vaccine. F(1) mice were less able to mount responses to the poorly immunogenic peptides when used as a sole immunogen, ruling out immunodomination. In addition, conserved TCR Vbeta usage between inbred and F(1) mice did not always correlate with strong responses in F(1) mice. However, direct estimation of naive precursor numbers showed that these were reduced in F(1) compared with inbred mice for specificities that were poorly immunogenic in the hybrids. These data have implications for our understanding of the extent to which MHC diversity alters the range of epitopes that are immunogenic in outbred populations.
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Affiliation(s)
- Inge E A Flesch
- Research School of Biology, Australian National University, Canberra, Australian Capital Territory, Australia
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24
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Valentine LE, Loffredo JT, Bean AT, León EJ, MacNair CE, Beal DR, Piaskowski SM, Klimentidis YC, Lank SM, Wiseman RW, Weinfurter JT, May GE, Rakasz EG, Wilson NA, Friedrich TC, O'Connor DH, Allison DB, Watkins DI. Infection with "escaped" virus variants impairs control of simian immunodeficiency virus SIVmac239 replication in Mamu-B*08-positive macaques. J Virol 2009; 83:11514-27. [PMID: 19726517 PMCID: PMC2772717 DOI: 10.1128/jvi.01298-09] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Accepted: 08/20/2009] [Indexed: 12/31/2022] Open
Abstract
An understanding of the mechanism(s) by which some individuals spontaneously control human immunodeficiency virus (HIV)/simian immunodeficiency virus replication may aid vaccine design. Approximately 50% of Indian rhesus macaques that express the major histocompatibility complex (MHC) class I allele Mamu-B*08 become elite controllers after infection with simian immunodeficiency virus SIVmac239. Mamu-B*08 has a binding motif that is very similar to that of HLA-B27, a human MHC class I allele associated with the elite control of HIV, suggesting that SIVmac239-infected Mamu-B*08-positive (Mamu-B*08+) animals may be a good model for the elite control of HIV. The association with MHC class I alleles implicates CD8+ T cells and/or natural killer cells in the control of viral replication. We therefore introduced point mutations into eight Mamu-B*08-restricted CD8+ T-cell epitopes to investigate the contribution of epitope-specific CD8+ T-cell responses to the development of the control of viral replication. Ten Mamu-B*08+ macaques were infected with this mutant virus, 8X-SIVmac239. We compared immune responses and viral loads of these animals to those of wild-type SIVmac239-infected Mamu-B*08+ macaques. The five most immunodominant Mamu-B*08-restricted CD8+ T-cell responses were barely detectable in 8X-SIVmac239-infected animals. By 48 weeks postinfection, 2 of 10 8X-SIVmac239-infected Mamu-B*08+ animals controlled viral replication to <20,000 viral RNA (vRNA) copy equivalents (eq)/ml plasma, while 10 of 15 wild-type-infected Mamu-B*08+ animals had viral loads of <20,000 vRNA copy eq/ml (P = 0.04). Our results suggest that these epitope-specific CD8+ T-cell responses may play a role in establishing the control of viral replication in Mamu-B*08+ macaques.
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Affiliation(s)
- Laura E. Valentine
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - John T. Loffredo
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Alex T. Bean
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Enrique J. León
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Caitlin E. MacNair
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Dominic R. Beal
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Shari M. Piaskowski
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Yann C. Klimentidis
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Simon M. Lank
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Roger W. Wiseman
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Jason T. Weinfurter
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Gemma E. May
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Eva G. Rakasz
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Nancy A. Wilson
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - Thomas C. Friedrich
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - David H. O'Connor
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - David B. Allison
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
| | - David I. Watkins
- Department of Pathology and Laboratory Medicine, University of Wisconsin—Madison, Madison, Wisconsin 53706, Wisconsin National Primate Research Center, University of Wisconsin—Madison, Madison, Wisconsin 53715, Section on Statistical Genetics, Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama 35294, Department of Pathobiological Sciences, University of Wisconsin School of Veterinary Medicine, Madison, Wisconsin 53706
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Motea EA, Berdis AJ. Terminal deoxynucleotidyl transferase: the story of a misguided DNA polymerase. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2009; 1804:1151-66. [PMID: 19596089 DOI: 10.1016/j.bbapap.2009.06.030] [Citation(s) in RCA: 154] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2009] [Revised: 06/27/2009] [Accepted: 06/30/2009] [Indexed: 01/06/2023]
Abstract
Nearly every DNA polymerase characterized to date exclusively catalyzes the incorporation of mononucleotides into a growing primer using a DNA or RNA template as a guide to direct each incorporation event. There is, however, one unique DNA polymerase designated terminal deoxynucleotidyl transferase that performs DNA synthesis using only single-stranded DNA as the nucleic acid substrate. In this chapter, we review the biological role of this enigmatic DNA polymerase and the biochemical mechanism for its ability to perform DNA synthesis in the absence of a templating strand. We compare and contrast the molecular events for template-independent DNA synthesis catalyzed by terminal deoxynucleotidyl transferase with other well-characterized DNA polymerases that perform template-dependent synthesis. This includes a quantitative inspection of how terminal deoxynucleotidyl transferase binds DNA and dNTP substrates, the possible involvement of a conformational change that precedes phosphoryl transfer, and kinetic steps that are associated with the release of products. These enzymatic steps are discussed within the context of the available structures of terminal deoxynucleotidyl transferase in the presence of DNA or nucleotide substrate. In addition, we discuss the ability of proteins involved in replication and recombination to regulate the activity of the terminal deoxynucleotidyl transferase. Finally, the biomedical role of this specialized DNA polymerase is discussed focusing on its involvement in cancer development and its use in biomedical applications such as labeling DNA for detecting apoptosis.
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Affiliation(s)
- Edward A Motea
- Department of Chemistry, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH 44106, USA
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Leon-Ponte M, Kasprzyski T, Mannik LA, Haeryfar SMM. Altered immunodominance hierarchies of influenza A virus-specific H-2(b)-restricted CD8+ T cells in the absence of terminal deoxynucleotidyl transferase. Immunol Invest 2008; 37:714-25. [PMID: 18821218 DOI: 10.1080/08820130802349908] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Immunodominance is considered an obstacle to successful T cell-based vaccination, and constant efforts are made to uncover the underlying mechanisms for this phenomenon. We have examined the contribution of terminal deoxynucleotidyl transferase (TdT), whose function accounts for approximately 90% of T cell receptor diversity, to dominance hierarchies of H-2(b)-restricted flu-specific T(CD8+). Using intracellular cytokine staining to quantitatively detect epitope-specific T(CD8+), we demonstrate that TdT-deficient mice exhibit a distinct hierarchical pattern in their primary and recall T(CD8+) responses to influenza A viruses, which results from skewed responsiveness towards select influenza epitopes. Our data establish a link between TdT and immunodominance in H-2(b)-restricted antiviral T(CD8+) responses.
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Affiliation(s)
- Matilde Leon-Ponte
- Department of Microbiology and Immunology, The University of Western Ontario, London, Ontario, Canada
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