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Naidoo K, Altfeld M. SARS-CoV-2 exploits innate miscommunication for persistence. Nat Immunol 2023; 24:1974-1975. [PMID: 37919526 DOI: 10.1038/s41590-023-01679-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2023]
Affiliation(s)
- Kewreshini Naidoo
- Department of Virus Immunology, Leibniz Institute of Virology, Hamburg, Germany
| | - Marcus Altfeld
- Department of Virus Immunology, Leibniz Institute of Virology, Hamburg, Germany.
- Institute of Immunology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
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2
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Liu M, Zhang Y, Hu Y, Guo Z, Dong L. The upregulation of peripheral CD3 -CD56 +CD16 + natural killer cells correlates with Th1/Th2 imbalance in asthma patients during acute upper respiratory viral infections. BMC Immunol 2023; 24:40. [PMID: 37865742 PMCID: PMC10590514 DOI: 10.1186/s12865-023-00575-y] [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: 05/12/2023] [Accepted: 10/10/2023] [Indexed: 10/23/2023] Open
Abstract
PURPOSE The aim of this study is to clarify the changes of peripheral CD3-CD56+CD16+ NK cells and their correlation with Th1/Th2 immunity profiles in asthma during the phase of acute upper respiratory viral infections (AURVIs). METHODS Peripheral venous blood and induced sputum samples were collected from 56 mild asthma patients, 49 asthma patients with AURVIs and 50 healthy subjects. Peripheral CD3-CD56+CD16+ NK cells were monitored by flow cytometry during the course of acute viral infections. Meanwhile, the induced sputum Th2 cytokines IL-4 and IL-5, and Th1 cytokine IFN-γ were also detected by ELISA assay. RESULTS The asthmatics had lower levels of peripheral CD3-CD56+CD16+ NK cells populations as well as higher induced sputum cytokines (IL-4, IL-5 and IFN-γ) compared to healthy controls at baseline. Upon upper respiratory viral infections, peripheral CD3-CD56+CD16+ NK cells numbers in asthma patients sharply elevated on day 3 and slowly decreased by day 14, in accordance with induced sputum IFN-γ changes. IL-4 and IL-5 levels spiked much later (day 8) and lasted until day 14. Compared with asthma alone group, the IFN-γ/IL-4 and IFN-γ/IL-5 ratios of the asthma patients with AURVIs on day 1 were higher and peaked on day 3. The changes of peripheral CD3-CD56+CD16+ NK cells proportions positively correlated with the IFN-γ/IL-4 and IFN-γ/IL-5 ratios on day 1 to day 3 in asthma subsequent to upper respiratory viral infections. CONCLUSIONS Our findings showed an imbalanced Th1/Th2 immunity in airways of asthma with acute upper respiratory viral infections. Upregulated peripheral CD3-CD56+CD16+ NK cells play a crucial role in biased Th1 immunity of airways in asthma during the acute phase of viral infections. The anti-viral Th1 immunity by targeting NK cells may be a possible therapeutic option for virus-induced asthma exacerbation.
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Affiliation(s)
- Meixuan Liu
- Department of Respiratory Medicine, Shanghai East Hospital, School of Medicine, Tongji University, 200123, Shanghai, China
| | - Yunxuan Zhang
- Department of Pharmacy, Huadong Hospital, Fudan University, 200120, Shanghai, China
| | - Yunqian Hu
- Department of Respiratory Medicine, Shanghai East Hospital, School of Medicine, Tongji University, 200123, Shanghai, China
| | - Zhongliang Guo
- Department of Respiratory Medicine, Shanghai East Hospital, School of Medicine, Tongji University, 200123, Shanghai, China.
| | - Lin Dong
- Department of Thoracic Surgery, Shanghai East Hospital, School of Medicine, Tongji University, 200123, Shanghai, China.
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3
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Mora-Bitria L, Asquith B. Innate receptors modulating adaptive T cell responses: KIR-HLA interactions and T cell-mediated control of chronic viral infections. Immunogenetics 2023; 75:269-282. [PMID: 36719466 PMCID: PMC9887252 DOI: 10.1007/s00251-023-01293-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Accepted: 01/02/2023] [Indexed: 02/01/2023]
Abstract
Killer-cell immunoglobulin-like receptors (KIRs) are mainly expressed on natural killer (NK) cells and are key regulators of innate immune responses. NK cells are the first responders in the face of infection and help promote placentation during pregnancy; the importance of KIRs in these NK-mediated processes is well-established. However, mounting evidence suggests that KIRs also have a prominent and long-lasting effect on the adaptive immune system. Here, we review the evidence for the impact of KIRs on T cell responses with a focus on the clinical significance of this interaction.
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Affiliation(s)
- Laura Mora-Bitria
- Department of Infectious Disease, Faculty of Medicine, Imperial College London, London, UK
| | - Becca Asquith
- Department of Infectious Disease, Faculty of Medicine, Imperial College London, London, UK.
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4
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Huang AL, Hendren N, Carter S, Larsen C, Garg S, La Hoz R, Farr M. Biomarker-Based Assessment for Infectious Risk Before and After Heart Transplantation. Curr Heart Fail Rep 2022; 19:236-246. [PMID: 35597863 PMCID: PMC9124010 DOI: 10.1007/s11897-022-00556-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/25/2022] [Indexed: 11/25/2022]
Abstract
Purpose of Review Survival outcomes for heart transplant recipients have improved in recent decades, but infection remains a significant cause of morbidity and mortality. In this review, we discuss several biological markers, or biomarkers, that may be used to monitor immunologic status in this patient population. Recent Findings While modest, data on the utility of immune biomarkers in heart transplant recipients suggest correlation between low level of immune response and increased infection risk. More novel assays, such as the detection of circulating levels of pathogen cell-free DNA in plasma and the use of Torque teno virus load as a surrogate for net state of immunosuppression, have potential to be additional important biomarkers. Summary Biomarker approaches to individualize immunosuppression therapy among heart transplant recipients is a promising area of medicine. However, additional studies are needed to inform the optimal protocol in which to incorporate these biomarkers into clinical practice.
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Affiliation(s)
- Athena L. Huang
- Parkland Memorial Hospital, Dallas, TX USA
- Division of Cardiology, University of Texas Southwestern Medical Center, 5959 Harry Hines Jr. Blvd, Dallas, TX 75235 USA
| | - Nicholas Hendren
- Parkland Memorial Hospital, Dallas, TX USA
- Division of Cardiology, University of Texas Southwestern Medical Center, 5959 Harry Hines Jr. Blvd, Dallas, TX 75235 USA
| | - Spencer Carter
- Parkland Memorial Hospital, Dallas, TX USA
- Division of Cardiology, University of Texas Southwestern Medical Center, 5959 Harry Hines Jr. Blvd, Dallas, TX 75235 USA
| | - Christian Larsen
- Division of Infectious Diseases and Geography Medicine, University of Texas Southwestern Medical Center, Dallas, TX USA
| | - Sonia Garg
- Division of Cardiology, University of Texas Southwestern Medical Center, 5959 Harry Hines Jr. Blvd, Dallas, TX 75235 USA
| | - Ricardo La Hoz
- Division of Infectious Diseases and Geography Medicine, University of Texas Southwestern Medical Center, Dallas, TX USA
| | - Maryjane Farr
- Division of Cardiology, University of Texas Southwestern Medical Center, 5959 Harry Hines Jr. Blvd, Dallas, TX 75235 USA
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5
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Wantoch M, Wilson EB, Droop AP, Phillips SL, Coffey M, El‐Sherbiny YM, Holmes TD, Melcher AA, Wetherill LF, Cook GP. Oncolytic virus treatment differentially affects the CD56 dim and CD56 bright NK cell subsets in vivo and regulates a spectrum of human NK cell activity. Immunology 2022; 166:104-120. [PMID: 35156714 PMCID: PMC10357483 DOI: 10.1111/imm.13453] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2021] [Accepted: 01/10/2022] [Indexed: 11/30/2022] Open
Abstract
Natural killer (NK) cells protect against intracellular infection and cancer. These properties are exploited in oncolytic virus (OV) therapy, where antiviral responses enhance anti-tumour immunity. We have analysed the mechanism by which reovirus, an oncolytic dsRNA virus, modulates human NK cell activity. Reovirus activates NK cells in a type I interferon (IFN-I) dependent manner, inducing STAT1 and STAT4 signalling in both CD56dim and CD56bright NK cell subsets. Gene expression profiling revealed the dominance of IFN-I responses and identified induction of genes associated with NK cell cytotoxicity and cell cycle progression, with distinct responses in the CD56dim and CD56bright subsets. However, reovirus treatment inhibited IL-15 induced NK cell proliferation in an IFN-I dependent manner and was associated with reduced AKT signalling. In vivo, human CD56dim and CD56bright NK cells responded with similar kinetics to reovirus treatment, but CD56bright NK cells were transiently lost from the peripheral circulation at the peak of the IFN-I response, suggestive of their redistribution to secondary lymphoid tissue. Coupled with the direct, OV-mediated killing of tumour cells, the activation of both CD56dim and CD56bright NK cells by antiviral pathways induces a spectrum of activity that includes the NK cell-mediated killing of tumour cells and modulation of adaptive responses via the trafficking of IFN-γ expressing CD56bright NK cells to lymph nodes.
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Affiliation(s)
- Michelle Wantoch
- Leeds Institute of Medical Research, School of Medicine, University of LeedsLeedsUK
- Present address:
Wellcome‐MRC Cambridge Stem Cell InstituteUniversity of CambridgeCambridgeUK
| | - Erica B. Wilson
- Leeds Institute of Medical Research, School of Medicine, University of LeedsLeedsUK
| | - Alastair P. Droop
- Leeds Institute of Medical Research, School of Medicine, University of LeedsLeedsUK
- Present address:
Wellcome Trust Sanger InstituteCambridgeUK
| | - Sarah L. Phillips
- Leeds Institute of Medical Research, School of Medicine, University of LeedsLeedsUK
| | | | - Yasser M. El‐Sherbiny
- Leeds Institute of Medical Research, School of Medicine, University of LeedsLeedsUK
- Present address:
School of Science and TechnologyNottingham Trent UniversityNottinghamUK
- Present address:
Clinical Pathology DepartmentFaculty of MedicineMansoura UniversityMansouraEgypt
| | - Tim D. Holmes
- Leeds Institute of Medical Research, School of Medicine, University of LeedsLeedsUK
- Present address:
Department of Clinical ScienceUniversity of BergenBergenNorway
| | - Alan A. Melcher
- Leeds Institute of Medical Research, School of Medicine, University of LeedsLeedsUK
- Present address:
Institute of Cancer ResearchLondonUK
| | - Laura F. Wetherill
- Leeds Institute of Medical Research, School of Medicine, University of LeedsLeedsUK
| | - Graham P. Cook
- Leeds Institute of Medical Research, School of Medicine, University of LeedsLeedsUK
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6
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Webb TJ. Inclusion criteria: how NK cells gain access to T cells. J Clin Invest 2021; 131:e152054. [PMID: 34523608 DOI: 10.1172/jci152054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Natural killer (NK) cells play an important role in host defense against viral infections and malignancy, and their role for regulating other components of the antiviral response is being investigated. In this issue of the JCI, Ali et al. examine the mechanisms by which NK cells migrate into the white pulp and mediate suppression of virus-specific T cells. Herein, the authors show that an acute lymphocytic choriomeningitis virus (LCMV) infection induced a potent type I IFN (IFN-I) response that resulted in the expression of chemokine receptor CXCR3 ligands and permitted NK cell trafficking to T cell zones. Collectively, these findings have broad implications for vaccination strategies and warrant further investigation into the transcriptomic profiles of these regulatory NK cells.
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Yan Y, Yao D, Li X. Immunological Mechanism and Clinical Application of PAMP Adjuvants. Recent Pat Anticancer Drug Discov 2021; 16:30-43. [PMID: 33563182 DOI: 10.2174/1574892816666210201114712] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Revised: 11/20/2020] [Accepted: 11/29/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND The host innate immune system can recognize Pathogen-Associated Molecular Patterns (PAMPs) through Pattern Recognition Receptors (PRRs), thereby initiating innate immune responses and subsequent adaptive immune responses. PAMPs can be developed as a vaccine adjuvant for modulating and optimizing antigen-specific immune responses, especially in combating viral infections and tumor therapy. Although several PAMP adjuvants have been successfully developed they are still lacking in general, and many of them are in the preclinical exploration stage. OBJECTIVE This review summarizes the research progress and development direction of PAMP adjuvants, focusing on their immune mechanisms and clinical applications. METHODS PubMed, Scopus, and Google Scholar were screened for this information. We highlight the immune mechanisms and clinical applications of PAMP adjuvants. RESULTS Because of the differences in receptor positions, specific immune cells targets, and signaling pathways, the detailed molecular mechanism and pharmacokinetic properties of one agonist cannot be fully generalized to another agonist, and each PAMP should be studied separately. In addition, combination therapy and effective integration of different adjuvants can increase the additional efficacy of innate and adaptive immune responses. CONCLUSION The mechanisms by which PAMPs exert adjuvant functions are diverse. With continuous discovery in the future, constant adjustments should be made to build new understandings. At present, the goal of therapeutic vaccination is to induce T cells that can specifically recognize and eliminate tumor cells and establish long-term immune memory. Following immune checkpoint modulation therapy, cancer treatment vaccines may be an option worthy of clinical testing.
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Affiliation(s)
- Yu Yan
- School of Medicine and Pharmacy, Ocean University of China, Qingdao, Shandong 266071, China
| | - Dan Yao
- School of Medicine and Pharmacy, Ocean University of China, Qingdao, Shandong 266071, China
| | - Xiaoyu Li
- School of Medicine and Pharmacy, Ocean University of China, Qingdao, Shandong 266071, China
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8
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Rahimi G, Rahimi B, Panahi M, Abkhiz S, Saraygord-Afshari N, Milani M, Alizadeh E. An overview of Betacoronaviruses-associated severe respiratory syndromes, focusing on sex-type-specific immune responses. Int Immunopharmacol 2021; 92:107365. [PMID: 33440306 PMCID: PMC7797024 DOI: 10.1016/j.intimp.2021.107365] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 12/31/2020] [Accepted: 12/31/2020] [Indexed: 01/25/2023]
Abstract
Emerging beta-coronaviruses (β-CoVs), including Severe Acute Respiratory Syndrome CoV-1 (SARS-CoV-1), Middle East Respiratory Syndrome-CoV (MERS-CoV), and Severe Acute Respiratory Syndrome CoV-2 (SARS-CoV-2, the cause of COVID19) are responsible for acute respiratory illnesses in human. The epidemiological features of the SARS, MERS, and new COVID-19 have revealed sex-dependent variations in the infection, frequency, treatment, and fatality rates of these syndromes. Females are likely less susceptible to viral infections, perhaps due to their steroid hormone levels, the impact of X-linked genes, and the sex-based immune responses. Although mostly inactive, the X chromosome makes the female's immune system more robust. The extra immune-regulatory genes of the X chromosome are associated with lower levels of viral load and decreased infection rate. Moreover, a higher titer of the antibodies and their longer blood circulation half-life are involved in a more durable immune protection in females. The activation rate of the immune cells and the production of TLR7 and IFN are more prominent in females. Although the bi-allelic expression of the immune regulatory genes can sometimes lead to autoimmune reactions, the higher titer of TLR7 in females is further associated with a stronger anti-viral immune response. Considering these sex-related differences and the similarities between the SARS, MERS, and COVID-19, we will discuss them in immune responses against the β-CoVs-associated syndromes. We aim to provide information on sex-based disease susceptibility and response. A better understanding of the evasion strategies of pathogens and the host immune responses can provide worthful insights into immunotherapy, and vaccine development approaches.
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Affiliation(s)
- Golbarg Rahimi
- Department of Cellular and Molecular Biology, University of Esfahan, Esfahan, Iran
| | - Bahareh Rahimi
- Department of Medical Biotechnology, Faculty of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Panahi
- Student Research Committee, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran,Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Shadi Abkhiz
- Department of Medical Biotechnology, Faculty of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Neda Saraygord-Afshari
- Department of Medical Biotechnology, Faculty of Allied Medical Sciences, Iran University of Medical Sciences, Tehran, Iran
| | - Morteza Milani
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences and Infectious and Tropical Diseases Research Center, Tabriz University of Medical Sciences, Tabriz, Iran,Corresponding authors at: Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Golgasht Street, Tabriz 5166/15731, Iran (M. Milani). Drug Applied Research Center and Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Golgasht Street, Tabriz 5166/15731, Iran (E. Alizadeh)
| | - Effat Alizadeh
- Drug Applied Research Center and Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran,Corresponding authors at: Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Golgasht Street, Tabriz 5166/15731, Iran (M. Milani). Drug Applied Research Center and Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Golgasht Street, Tabriz 5166/15731, Iran (E. Alizadeh)
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9
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Abdul-Jawad S, Baù L, Alaguthurai T, Del Molino Del Barrio I, Laing AG, Hayday TS, Monin L, Muñoz-Ruiz M, McDonald L, Francos Quijorna I, McKenzie D, Davis R, Lorenc A, Chan JNE, Ryan S, Bugallo-Blanco E, Yorke R, Kamdar S, Fish M, Zlatareva I, Vantourout P, Jennings A, Gee S, Doores K, Bailey K, Hazell S, De Naurois J, Moss C, Russell B, Khan AA, Rowley M, Benjamin R, Enting D, Alrifai D, Wu Y, Zhou Y, Barber P, Ng T, Spicer J, Van Hemelrijck M, Kumar M, Vidler J, Lwin Y, Fields P, Karagiannis SN, Coolen ACC, Rigg A, Papa S, Hayday AC, Patten PEM, Irshad S. Acute Immune Signatures and Their Legacies in Severe Acute Respiratory Syndrome Coronavirus-2 Infected Cancer Patients. Cancer Cell 2021; 39:257-275.e6. [PMID: 33476581 PMCID: PMC7833668 DOI: 10.1016/j.ccell.2021.01.001] [Citation(s) in RCA: 83] [Impact Index Per Article: 27.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/02/2020] [Accepted: 12/30/2020] [Indexed: 01/09/2023]
Abstract
Given the immune system's importance for cancer surveillance and treatment, we have investigated how it may be affected by SARS-CoV-2 infection of cancer patients. Across some heterogeneity in tumor type, stage, and treatment, virus-exposed solid cancer patients display a dominant impact of SARS-CoV-2, apparent from the resemblance of their immune signatures to those for COVID-19+ non-cancer patients. This is not the case for hematological malignancies, with virus-exposed patients collectively displaying heterogeneous humoral responses, an exhausted T cell phenotype and a high prevalence of prolonged virus shedding. Furthermore, while recovered solid cancer patients' immunophenotypes resemble those of non-virus-exposed cancer patients, recovered hematological cancer patients display distinct, lingering immunological legacies. Thus, while solid cancer patients, including those with advanced disease, seem no more at risk of SARS-CoV-2-associated immune dysregulation than the general population, hematological cancer patients show complex immunological consequences of SARS-CoV-2 exposure that might usefully inform their care.
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Affiliation(s)
- Sultan Abdul-Jawad
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - Luca Baù
- Institute of Biomedical Engineering, University of Oxford, Oxford, UK
| | - Thanussuyah Alaguthurai
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK; Breast Cancer Now Research Unit, King's College London, London, UK
| | - Irene Del Molino Del Barrio
- Cancer Immunotherapy Accelerator, UCL Cancer Institute, University College and King's College, London, UK; Peter Gorer Department of Immunobiology, King's College London, London, UK
| | - Adam G Laing
- Peter Gorer Department of Immunobiology, King's College London, London, UK
| | - Thomas S Hayday
- Peter Gorer Department of Immunobiology, King's College London, London, UK
| | | | | | - Louisa McDonald
- Oncology and Haematology Clinical Trials (OHCT), Guy's and St Thomas' NHS Foundation Trust, London UK
| | | | | | - Richard Davis
- Peter Gorer Department of Immunobiology, King's College London, London, UK
| | - Anna Lorenc
- Peter Gorer Department of Immunobiology, King's College London, London, UK
| | - Julie Nuo En Chan
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - Sarah Ryan
- Department of Inflammation Biology, King's College London, London, UK
| | - Eva Bugallo-Blanco
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - Rozalyn Yorke
- Department of Inflammation Biology, King's College London, London, UK
| | - Shraddha Kamdar
- Peter Gorer Department of Immunobiology, King's College London, London, UK
| | - Matthew Fish
- Peter Gorer Department of Immunobiology, King's College London, London, UK; Department of Intensive Care Medicine, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Iva Zlatareva
- Peter Gorer Department of Immunobiology, King's College London, London, UK
| | - Pierre Vantourout
- Peter Gorer Department of Immunobiology, King's College London, London, UK
| | - Aislinn Jennings
- Peter Gorer Department of Immunobiology, King's College London, London, UK; Department of Intensive Care Medicine, Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Sarah Gee
- Peter Gorer Department of Immunobiology, King's College London, London, UK
| | - Katie Doores
- Department of Infectious Diseases, King's College London, London, UK
| | - Katharine Bailey
- Department of Haematology, Guy's and St Thomas' NHS Foundation trust, London, UK
| | - Sophie Hazell
- Department of Haematology, Guy's and St Thomas' NHS Foundation trust, London, UK
| | - Julien De Naurois
- Department of Medical Oncology Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Charlotte Moss
- Department of Translational Oncology & Urology Research (TOUR), King's College London, London, UK
| | - Beth Russell
- Department of Translational Oncology & Urology Research (TOUR), King's College London, London, UK
| | - Aadil A Khan
- Targeted Therapy Team, The Institute of Cancer Research, London, UK
| | - Mark Rowley
- London Institute for Mathematical Sciences, Mayfair, London, UK; Saddle Point Science Ltd, London, UK
| | - Reuben Benjamin
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK; Department of Haematological Medicine, King's College Hospital, London, UK
| | - Deborah Enting
- Department of Translational Oncology & Urology Research (TOUR), King's College London, London, UK
| | - Doraid Alrifai
- Department of Medical Oncology Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Yin Wu
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK; Cancer Immunotherapy Accelerator, UCL Cancer Institute, University College and King's College, London, UK; Peter Gorer Department of Immunobiology, King's College London, London, UK; The Francis Crick Institute, London, UK
| | - You Zhou
- Systems Immunity University Research Institute and Division of Infection and Immunity, Cardiff University, Cardiff, UK
| | - Paul Barber
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - Tony Ng
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - James Spicer
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - Mieke Van Hemelrijck
- Department of Translational Oncology & Urology Research (TOUR), King's College London, London, UK
| | - Mayur Kumar
- Department of Gastroenterology, Princess Royal University Hospital, Kent, UK
| | - Jennifer Vidler
- Department of Haematological Medicine, King's College Hospital, London, UK
| | - Yadanar Lwin
- Department of Haematological Medicine, King's College Hospital, London, UK
| | - Paul Fields
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK; Department of Haematology, Guy's and St Thomas' NHS Foundation trust, London, UK
| | - Sophia N Karagiannis
- Breast Cancer Now Research Unit, King's College London, London, UK; St. John's Institute of Dermatology, King's College London, London, UK; NIHR Biomedical Research Centre, and King's College London, London, UK
| | - Anthony C C Coolen
- Targeted Therapy Team, The Institute of Cancer Research, London, UK; London Institute for Mathematical Sciences, Mayfair, London, UK; Saddle Point Science Ltd, London, UK; Department of Biophysics, Radboud University, Nijmegen, The Netherlands
| | - Anne Rigg
- Department of Medical Oncology Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Sophie Papa
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK; Department of Medical Oncology Guy's and St Thomas' NHS Foundation Trust, London, UK
| | - Adrian C Hayday
- Peter Gorer Department of Immunobiology, King's College London, London, UK; The Francis Crick Institute, London, UK
| | - Piers E M Patten
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK; Department of Haematological Medicine, King's College Hospital, London, UK; Medical Research Council (MRC) Clinical Academic Research Partnership, London, UK
| | - Sheeba Irshad
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK; Breast Cancer Now Research Unit, King's College London, London, UK; Department of Medical Oncology Guy's and St Thomas' NHS Foundation Trust, London, UK; Cancer Research UK (CRUK) Clinician Scientist, London, UK.
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10
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Rosen HR, Golden-Mason L. Control of HCV Infection by Natural Killer Cells and Macrophages. Cold Spring Harb Perspect Med 2020; 10:a037101. [PMID: 31871225 PMCID: PMC7447067 DOI: 10.1101/cshperspect.a037101] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Host defense against invading pathogens within the liver is dominated by innate immunity. Natural killer (NK) cells have been implicated at all stages of hepatitis C virus (HCV) infection, from providing innate protection to contributing to treatment-induced clearance. Decreased NK cell levels, altered NK cell subset distribution, activation marker expression, and functional polarization toward a cytolytic phenotype are hallmarks of chronic HCV infection. Interferon α (IFN-α) is a potent activator of NK cells; therefore, it is not surprising that NK cell activation has been identified as a key factor associated with sustained virological response (SVR) to IFN-α-based therapies. Understanding the role of NK cells, macrophages, and other innate immune cells post-SVR remains paramount for prevention of disease pathogenesis and progression. Novel strategies to treat liver disease may be aimed at targeting these cells.
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Affiliation(s)
- Hugo R Rosen
- Department of Medicine, University of Southern California (USC), Los Angeles, California 90033, USA
- USC Research Center for Liver Diseases, Los Angeles, California 90033, USA
| | - Lucy Golden-Mason
- Department of Medicine, University of Southern California (USC), Los Angeles, California 90033, USA
- USC Research Center for Liver Diseases, Los Angeles, California 90033, USA
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11
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Responsiveness to Influenza Vaccination Correlates with NKG2C-Expression on NK Cells. Vaccines (Basel) 2020; 8:vaccines8020281. [PMID: 32517137 PMCID: PMC7349951 DOI: 10.3390/vaccines8020281] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/24/2020] [Accepted: 06/03/2020] [Indexed: 12/24/2022] Open
Abstract
Influenza vaccination often results in a large percentage of low responders, especially in high-risk groups. As a first line of defense, natural killer (NK) cells play a crucial role in the fight against infections. However, their implication with regard to vaccine responsiveness is insufficiently assessed. Therefore, this study aimed at the validation of essential NK cell features potentially associated with differential vaccine responsiveness with a special focus on NKG2C- and/or CD57-expressing NK cells considered to harbor memory-like functions. To this end, 16 healthy volunteers were vaccinated with an adjuvanted pandemic influenza vaccine. Vaccine responders and low responders were classified according to their hemagglutination inhibition antibody titers. A majority of responders displayed enhanced frequencies of NKG2C-expressing NK cells 7- or 14-days post-vaccination as compared to low responders, whereas the expression of CD57 was not differentially modulated. The NK cell cytotoxic potential was found to be confined to CD56dimCD16+ NKG2C-expressing NK cells in the responders but not in the low responders, which was further confirmed by stochastic neighbor embedding analysis. The presented study is the first of its kind that ascribes CD56dimCD16+ NKG2C-expressing NK cells a crucial role in biasing adaptive immune responses upon influenza vaccination and suggests NKG2C as a potential biomarker in predicting pandemic influenza vaccine responsiveness.
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12
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Klarquist J, Cantrell R, Lehn MA, Lampe K, Hennies CM, Hoebe K, Janssen EM. Type I IFN Drives Experimental Systemic Lupus Erythematosus by Distinct Mechanisms in CD4 T Cells and B Cells. Immunohorizons 2020; 4:140-152. [PMID: 32161059 PMCID: PMC7294741 DOI: 10.4049/immunohorizons.2000005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 02/20/2020] [Indexed: 12/20/2022] Open
Abstract
Myriad studies have linked type I IFN to the pathogenesis of autoimmune diseases, including systemic lupus erythematosus (SLE). Although increased levels of type I IFN are found in patients with SLE, and IFN blockade ameliorates disease in many mouse models of lupus, its precise roles in driving SLE pathogenesis remain largely unknown. In this study, we dissected the effect of type I IFN sensing by CD4 T cells and B cells on the development of T follicular helper cells (TFH), germinal center (GC) B cells, plasmablasts, and antinuclear dsDNA IgG levels using the bm12 chronic graft-versus-host disease model of SLE-like disease. Type I IFN sensing by B cells decreased their threshold for BCR signaling and increased their expression of MHC class II, CD40, and Bcl-6, requirements for optimal GC B cell functions. In line with these data, ablation of type I IFN sensing in B cells significantly reduced the accumulation of GC B cells, plasmablasts, and autoantibodies. Ablation of type I IFN sensing in T cells significantly inhibited TFH expansion and subsequent B cell responses. In contrast to the effect in B cells, type I IFN did not promote proliferation in the T cells but protected them from NK cell-mediated killing. Consequently, ablation of either perforin or NK cells completely restored TFH expansion of IFNAR-/- TFH and, subsequently, restored the B cell responses. Together, our data provide evidence for novel roles of type I IFN and immunoregulatory NK cells in the context of sterile inflammation and SLE-like disease.
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Affiliation(s)
- Jared Klarquist
- Department of Immunology and Microbiology, University of Colorado, Anschutz Medical Campus, Aurora, CO 80045;
| | - Rachel Cantrell
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; and
| | - Maria A Lehn
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; and
| | - Kristin Lampe
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; and
| | - Cassandra M Hennies
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH 45267
- Division of Immunobiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH 45229; and
| | - Kasper Hoebe
- Janssen Research and Development, Johnson & Johnson, Spring House, PA 19477
| | - Edith M Janssen
- Janssen Research and Development, Johnson & Johnson, Spring House, PA 19477
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13
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Szereday L, Meggyes M, Berki T, Miseta A, Farkas N, Gervain J, Par A, Par G. Direct-acting antiviral treatment downregulates immune checkpoint inhibitor expression in patients with chronic hepatitis C. Clin Exp Med 2020; 20:219-230. [PMID: 32108916 PMCID: PMC7181552 DOI: 10.1007/s10238-020-00618-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Accepted: 02/18/2020] [Indexed: 12/13/2022]
Abstract
Chronic hepatitis C (CHC) infection is associated with increased TIM-3, PD-1 immune checkpoint receptors expression that inhibits adaptive T cells and increases NK cell cytotoxicity against T helper cells, both resulting T cell exhaustion. Elimination of the virus with direct-acting antivirals (DAAs) may modify host immune response via altering these immune checkpoint receptors’ expression. We conducted a prospective study to analyze changes in TIM-3, PD-1 and their ligands galectin-9, PD-L1 expression by peripheral blood T cell subpopulations, NK cell subpopulations, and monocytes by multicolor flow cytometry in 14 CHC patients successfully treated with 12 weeks of dasabuvir, ombitasvir, and paritaprevir/ritonavir plus ribavirin. Blood samples were collected before, at the end of treatment, and 12 and 24 weeks later. Sustained virological response (SVR) was associated with increased percentage of peripheral blood CD3+ T and CD8+ cytotoxic T lymphocytes and decreased percentage of NKbright cells. After DAA treatment, decreased TIM-3 expression by CD4+ T cells, by NKbright, and by NKT cells was found. Expression of immune checkpoint molecules’ ligand PD-L1 by NK cells and by regulatory T cells and galectin-9 by NK cells and monocytes also decreased significantly at SVR. Our data suggest that DAA treatment not only inhibits viral replication but may alter host adaptive and innate immune responses. A decrease in immune checkpoint molecules and their ligands expression both on adaptive and on innate immune cells may contribute to the recovery of exhausted adaptive immune responses and to sustained virological response.
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Affiliation(s)
- Laszlo Szereday
- Department of Medical Microbiology and Immunology, University of Pecs, Medical School, 12 Szigeti Street, Pecs, 7624, Hungary. .,Janos Szentagothai Research Centre, Pecs, Hungary.
| | - Matyas Meggyes
- Department of Medical Microbiology and Immunology, University of Pecs, Medical School, 12 Szigeti Street, Pecs, 7624, Hungary.,Janos Szentagothai Research Centre, Pecs, Hungary
| | - Timea Berki
- Department of Biotechnology and Immunology, University of Pecs, Medical School, Pecs, Hungary
| | - Attila Miseta
- Department of Laboratory Medicine, University of Pecs, Medical School, Pecs, Hungary
| | - Nelli Farkas
- Institute for Translational Medicine, University of Pecs, Medical School, Pecs, Hungary
| | - Judit Gervain
- County Hospital Fejér, Szent György Hospital, Szekesfehervar, Hungary
| | - Alajos Par
- Division of Gastroenterology, First Department of Medicine, University of Pecs, Medical School, Pecs, Hungary
| | - Gabriella Par
- Institute for Translational Medicine, University of Pecs, Medical School, Pecs, Hungary.,Division of Gastroenterology, First Department of Medicine, University of Pecs, Medical School, Pecs, Hungary
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14
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Terrén I, Orrantia A, Mikelez-Alonso I, Vitallé J, Zenarruzabeitia O, Borrego F. NK Cell-Based Immunotherapy in Renal Cell Carcinoma. Cancers (Basel) 2020; 12:cancers12020316. [PMID: 32013092 PMCID: PMC7072691 DOI: 10.3390/cancers12020316] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 01/14/2020] [Accepted: 01/23/2020] [Indexed: 02/06/2023] Open
Abstract
Natural killer (NK) cells are cytotoxic lymphocytes that are able to kill tumor cells without prior sensitization. It has been shown that NK cells play a pivotal role in a variety of cancers, highlighting their relevance in tumor immunosurveillance. NK cell infiltration has been reported in renal cell carcinoma (RCC), the most frequent kidney cancer in adults, and their presence has been associated with patients’ survival. However, the role of NK cells in this disease is not yet fully understood. In this review, we summarize the biology of NK cells and the mechanisms through which they are able to recognize and kill tumor cells. Furthermore, we discuss the role that NK cells play in renal cell carcinoma, and review current strategies that are being used to boost and exploit their cytotoxic capabilities.
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Affiliation(s)
- Iñigo Terrén
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (I.T.); (A.O.); (I.M.-A.); (J.V.); (O.Z.)
| | - Ane Orrantia
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (I.T.); (A.O.); (I.M.-A.); (J.V.); (O.Z.)
| | - Idoia Mikelez-Alonso
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (I.T.); (A.O.); (I.M.-A.); (J.V.); (O.Z.)
- CIC biomaGUNE, 20014 Donostia-San Sebastián, Spain
| | - Joana Vitallé
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (I.T.); (A.O.); (I.M.-A.); (J.V.); (O.Z.)
| | - Olatz Zenarruzabeitia
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (I.T.); (A.O.); (I.M.-A.); (J.V.); (O.Z.)
| | - Francisco Borrego
- Immunopathology Group, Biocruces Bizkaia Health Research Institute, 48903 Barakaldo, Spain; (I.T.); (A.O.); (I.M.-A.); (J.V.); (O.Z.)
- Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
- Correspondence: ; Tel.: +34-94-600-6000 (ext. 7079)
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15
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Affinity Maturation Is Impaired by Natural Killer Cell Suppression of Germinal Centers. Cell Rep 2019; 24:3367-3373.e4. [PMID: 30257198 PMCID: PMC6192537 DOI: 10.1016/j.celrep.2018.08.075] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 07/07/2018] [Accepted: 08/24/2018] [Indexed: 02/07/2023] Open
Abstract
Somatic hypermutation of immunoglobulin sequences in germinal center (GC) reactions must be optimized to elicit high-affinity, protective antibodies after vaccination. We expose natural killer (NK) cells as robust negative regulators of somatic hypermutation in antigen-reactive B cells. NK cells restrict follicular helper T cell (TFH) and GC B cell frequencies and titers of antigen-specific immunoglobulin after administration of alum-adjuvanted hapten-protein conjugate vaccines. This inhibition is perforin dependent, suggesting that NK cells kill one or more cells critical for GC development. In the presence of perforin-competent NK cells, antigen-specific GC B cells acquire fewer mutations, including less frequent generation of non-synonymous substitutions and mutations associated with increased antibody affinity. Thus, NK cells limit the magnitude of GC reactions and thereby restrain vaccine elicitation of high-affinity antibodies. Circumventing this activity of NK cells during vaccination has strong potential to enhance humoral immunity and facilitate vaccine-elicited prevention of disease.
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16
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Gyurova IE, Schlums H, Sucharew H, Ambroggio L, Ochayon DE, Win HT, Bryceson YT, Bernstein DI, Waggoner SN. Dynamic Changes in Natural Killer Cell Subset Frequencies in the Absence of Cytomegalovirus Infection. Front Immunol 2019; 10:2728. [PMID: 31824507 PMCID: PMC6882915 DOI: 10.3389/fimmu.2019.02728] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Accepted: 11/07/2019] [Indexed: 01/02/2023] Open
Abstract
Individuals lacking functional natural killer (NK) cells suffer severe, recurrent infections with cytomegalovirus (CMV), highlighting the critical role of NK cells in antiviral defense. Therefore, ongoing attempts to develop an efficacious vaccine to prevent CMV infection should potentially aim to elicit NK-cell antiviral responses as an accessory to conventional T- and B-cell based approaches. In this regard, CMV infection provokes marked phenotypic and functional differentiation of the NK-cell compartment, including development of adaptive NK cells that exhibit enhanced antiviral activity. We examined longitudinal blood samples collected from 40 CMV-seronegative adolescents to ascertain whether a CMV glycoprotein B (gB) vaccine in the absence of CMV infection can stimulate differentiation or expansion of CMV-associated subsets of NK cells. Study participants uniformly lacked the CMV-dependent NKG2C+ subset of NK cells, suggesting that an adjuvanted CMV gB vaccine alone is an inadequate stimulus for sustained expansion of these cells. In contrast, we observed unexpected dynamic fluctuations in the frequency of NK cells lacking FcRγ, EAT-2, and SYK, which were independent of vaccination or CMV infection. Whereas, FcRγneg NK cells in CMV infection are reported to express increased levels of the maturation marker CD57, the FcRγneg NK cells observed in our CMV-negative vaccine cohort express less CD57 than their FcRγ+ counterparts. The FcRγneg NK cells in CMV-negative individuals were also functionally distinct from this subset in CMV infection, exhibiting comparable IFN-γ production and degranulation as FcRγ+ NK cells in response to cytokine or antibody-dependent stimuli. These results suggest that frequencies of some NK cell subsets may increase in response to unknown environmental or inflammatory cues distinct from that which occurs after CMV infection. Greater understanding of the nature of the signals driving CMV-independent accumulation of these subsets should permit development of mechanisms to facilitate vaccine-driven expansion of CMV-reactive NK cells.
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Affiliation(s)
- Ivayla E Gyurova
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States.,Pathobiology and Molecular Medicine Graduate Program, University of Cincinnati, Cincinnati, OH, United States
| | - Heinrich Schlums
- Department of Medicine, Center for Hematology and Regenerative Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Heidi Sucharew
- Division of Biostatistics and Epidemiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Lilliam Ambroggio
- Sections of Emergency Medicine and Hospital Medicine, Department of Pediatrics, Children's Hospital Colorado, University of Colorado Denver, Denver, CO, United States
| | - David E Ochayon
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Hannah Than Win
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Yenan T Bryceson
- Department of Medicine, Center for Hematology and Regenerative Medicine, Karolinska Institutet, Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - David I Bernstein
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States.,Division of Infectious Diseases, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Stephen N Waggoner
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States.,Pathobiology and Molecular Medicine Graduate Program, University of Cincinnati, Cincinnati, OH, United States.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States
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17
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Alosaimi B, Hamed ME, Naeem A, Alsharef AA, AlQahtani SY, AlDosari KM, Alamri AA, Al-Eisa K, Khojah T, Assiri AM, Enani MA. MERS-CoV infection is associated with downregulation of genes encoding Th1 and Th2 cytokines/chemokines and elevated inflammatory innate immune response in the lower respiratory tract. Cytokine 2019; 126:154895. [PMID: 31706200 PMCID: PMC7128721 DOI: 10.1016/j.cyto.2019.154895] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 10/14/2019] [Accepted: 10/17/2019] [Indexed: 12/31/2022]
Abstract
MERS-CoV infection downregulates Th1 and Th2 cytokines and chemokines. MERS-CoV infection provokes high levels of IL-1α, IL-1β and IL-8 (CXCL8). Inflammatory cytokines/chemokines correlate with MERS-CoV case fatality rate. Th1/Th2 downregulation may contribute to severe infection and evolution of ARDS.
MERS-CoV, a highly pathogenic virus in humans, is associated with high morbidity and case fatality. Inflammatory responses have a significant impact on MERS-CoV pathogenesis and disease outcome. However, CD4+ T-cell induced immune responses during acute MERS-CoV infection are barely detectable, with potent inhibition of effector T cells and downregulation of antigen presentation. The local pulmonary immune response, particularly the Th1 and Th2-related immune response during acute severe MERS-CoV infection is not fully understood. In this study, we offer the first insights into the pulmonary gene expression profile of Th1 and Th2-related cytokines/chemokines (Th1 & Th2 responses) during acute MERS-CoV infection using RT2 Profiler PCR Arrays. We also quantified the expression level of primary inflammatory cytokines/chemokines. Our results showed a downregulation of Th2, inadequate (partial) Th1 immune response and high expression levels of inflammatory cytokines IL-1α and IL-1β and the neutrophil chemoattractant chemokine IL-8 (CXCL8) in the lower respiratory tract of MERS-CoV infected patients. Moreover, we identified a high viral load in all included patients. We also observed a correlation between inflammatory cytokines, Th1, and Th2 downregulation and the case fatality rate. Th1 and Th2 response downregulation, high expression of inflammatory cytokines, and high viral load may contribute to lung inflammation, severe infection, the evolution of pneumonia and ARDS, and a higher case fatality rate. Further study of the molecular mechanisms underlying the Th1 and Th2 regulatory pathways will be vital for active vaccine development and the identification of novel therapeutic strategies.
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Affiliation(s)
- Bandar Alosaimi
- Research Center, King Fahad Medical City, Riyadh, Saudi Arabia; College of Medicine, King Fahad Medical City, Riyadh, Saudi Arabia.
| | - Maaweya E Hamed
- College of Science, King Saud University, Department of Botany and Microbiology, Riyadh, Saudi Arabia
| | - Asif Naeem
- Research Center, King Fahad Medical City, Riyadh, Saudi Arabia
| | - Ali A Alsharef
- General Directorate of Laboratories and Blood Banks, Ministry of Health, Saudi Arabia
| | - Saeed Y AlQahtani
- General Directorate of Laboratories and Blood Banks, Ministry of Health, Saudi Arabia
| | - Kamel M AlDosari
- Riyadh Regional Laboratory, Ministry of Health, Riyadh, Saudi Arabia
| | - Aref A Alamri
- Riyadh Regional Laboratory, Ministry of Health, Riyadh, Saudi Arabia
| | - Kholoud Al-Eisa
- Riyadh Regional Laboratory, Ministry of Health, Riyadh, Saudi Arabia
| | - Taghreed Khojah
- Riyadh Regional Laboratory, Ministry of Health, Riyadh, Saudi Arabia
| | - Abdullah M Assiri
- Preventive Medicine Assistant Deputyship, Ministry of Health, Riyadh, Saudi Arabia
| | - Mushira A Enani
- Medical Specialties Department, Section of Infectious Diseases, King Fahad Medical City, Riyadh, Saudi Arabia
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18
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Uzhachenko RV, Shanker A. CD8 + T Lymphocyte and NK Cell Network: Circuitry in the Cytotoxic Domain of Immunity. Front Immunol 2019; 10:1906. [PMID: 31456803 PMCID: PMC6700470 DOI: 10.3389/fimmu.2019.01906] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2019] [Accepted: 07/29/2019] [Indexed: 12/15/2022] Open
Abstract
Multiple effector layers in the immune system ensure an optimal temporal and spatial distribution of immune defense. Cytotoxic innate lymphoid natural killers (NK) and adaptive CD8+ T lymphocytes (CTL) interact to elicit specific cytolytic outcomes. The CTL carry antigen-specific T cell receptors (TCR) to recognize cognate peptides bound with major histocompatibility complex class-I (MHC-I) or human leukocyte antigen (HLA) molecules on target cells. Upon TCR engagement with MHC-I:peptide at a threshold of avidity, T cell intracellular programs converge into cytolytic activity. By contrast, NK cells lack antigen-specific receptors but express a repertoire of highly polymorphic and polygenic inhibitory and activating receptors that bind various ligands including MHC and like molecules. A highly calibrated maturation enables NK cells to eliminate target cells with lowered or absent MHC-I or induced MHC-I-related molecules while maintaining their tolerance toward self-MHC. Both CTL and mature NK cells undergo membranous reorganization and express various effector molecules to eliminate aberrant cells undergoing a stress of transformation, infection or other pathological noxa. Here, we present the cellular modules that underlie the CTL–NK circuitry to maximize their effector cooperativity against stressed or cancerous cells.
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Affiliation(s)
- Roman V Uzhachenko
- Department of Biochemistry, Cancer Biology, Neuroscience and Pharmacology, School of Medicine, Meharry Medical College, Nashville, TN, United States
| | - Anil Shanker
- Department of Biochemistry, Cancer Biology, Neuroscience and Pharmacology, School of Medicine, Meharry Medical College, Nashville, TN, United States.,Host-Tumor Interactions Research Program, Vanderbilt-Ingram Comprehensive Cancer Center, Vanderbilt University School of Medicine, Nashville, TN, United States.,Vanderbilt Center for Immunobiology, Vanderbilt University School of Medicine, Nashville, TN, United States.,Vanderbilt Institute for Infection, Immunology and Inflammation, Vanderbilt University School of Medicine, Nashville, TN, United States
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19
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Pallmer K, Barnstorf I, Baumann NS, Borsa M, Jonjic S, Oxenius A. NK cells negatively regulate CD8 T cells via natural cytotoxicity receptor (NCR) 1 during LCMV infection. PLoS Pathog 2019; 15:e1007725. [PMID: 30995287 PMCID: PMC6469806 DOI: 10.1371/journal.ppat.1007725] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 03/21/2019] [Indexed: 11/23/2022] Open
Abstract
Besides their function in recognizing cancerous and virally infected cells, natural killer (NK) cells have the potential to shape adaptive immune responses. However, the mechanisms employed by NK cells to negatively regulate virus-specific CD8 T cell responses remain to be fully defined. Using activating receptor natural cytotoxicity receptor (NCR) 1 deficient (NCR1gfp/gfp) mice, we found increased numbers of virus-specific CD8 T cells, leading to enhanced virus control during acute LCMV infection. Furthermore, virus-specific CD8 T cells were more activated in the absence of NCR1, resulting in exacerbated immunopathology, documented by weight loss, and superior virus control early during chronic LCMV infection. Transfer experiments of virus-specific CD8 T cells into NCR1 deficient hosts revealed a direct cross talk between NK and CD8 T cells. Studies on the splenic microarchitecture revealed pronounced disorganization of T cells in infected NCR1gfp/gfp mice, resulting in enhanced immunopathology and disruption of the T cell niche upon chronic LCMV infection. Our data show a novel pathway employed by NK cells to regulate antiviral CD8 T cell responses, namely direct recognition and elimination of activated CD8 T cells via NCR1 early during infection to protect the host from an overshooting T cell response. LCMV, which is part of the Arenaviridae family, is a well-established mouse model for acute and chronic virus infections, and it has allowed the identification of many immunological principles that were subsequently confirmed in human infections, such as CTL escape or CD8 T cell exhaustion. NK cells belong to the first line defense, being activated early following infection or exposure to malignant cells, and mediate their antiviral or anti-tumoral effect by direct cytotoxicity and inflammatory cytokine secretion. While NK cells are dispensable for control of LCMV, NK cells have the potential to shape adaptive immunity by regulating T cell responses. The absence of NK cells leads to increased T cell immunity and thereby, to faster eradication of the virus. However, the detailed mechanisms of how NK cells control antiviral T cell responses is still poorly defined. Here, we identified the activating NK cell receptor NCR1 to be involved in the regulation of CD8 T cell responses during acute and chronic LCMV infection. The absence of NCR1 led to a more robust CD4 and CD8 T cell response and to superior viral control in acute and chronic LCMV infections. However, the increased CD8 T cell responses led to severe immunopathology in the setting of chronic infection. Hence, NK cells curtail CD8 T cell responses to protect the host from immunopathological damage in an NCR1 dependent manner.
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Affiliation(s)
| | | | | | - Mariana Borsa
- Institute of Microbiology, ETH Zürich, Zürich, Switzerland
| | - Stipan Jonjic
- Department of Histology and Embryology, Faculty of Medicine, Rijeka, Croatia
| | - Annette Oxenius
- Institute of Microbiology, ETH Zürich, Zürich, Switzerland
- * E-mail:
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20
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Middle East Respiratory Syndrome Coronavirus (MERS-CoV): Infection, Immunological Response, and Vaccine Development. J Immunol Res 2019; 2019:6491738. [PMID: 31089478 PMCID: PMC6476043 DOI: 10.1155/2019/6491738] [Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/20/2019] [Accepted: 02/20/2019] [Indexed: 02/06/2023] Open
Abstract
Middle East respiratory syndrome coronavirus (MERS-CoV) first emerged in late 2012. Since its emergence, a total of 2279 patients from 27 countries have been infected across the globe according to a World Health Organization (WHO) report (Feb. 12th, 2019). Approximately 806 patients have died. The virus uses its spike proteins as adhesive factors that are proinflammatory for host entry through a specific receptor called dipeptidyl peptidase-4 (DPP4). This receptor is considered a key factor in the signaling and activation of the acquired and innate immune responses in infected patients. Using potent antigens in combination with strong adjuvants may effectively trigger the activation of specific MERS-CoV cellular responses as well as the production of neutralizing antibodies. Unfortunately, to date, there is no effective approved treatment or vaccine for MERS-CoV. Thus, there are urgent needs for the development of novel MERS-CoV therapies as well as vaccines to help minimize the spread of the virus from infected patients, thereby mitigating the risk of any potential pandemics. Our main goals are to highlight and describe the current knowledge of both the innate and adaptive immune responses to MERS-CoV and the current state of MERS-CoV vaccine development. We believe this study will increase our understanding of the mechanisms that enhance the MERS-CoV immune response and subsequently contribute to the control of MERS-CoV infections.
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21
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Zenere G, Olwenyi OA, Byrareddy SN, Braun SE. Optimizing intracellular signaling domains for CAR NK cells in HIV immunotherapy: a comprehensive review. Drug Discov Today 2019; 24:983-991. [PMID: 30771481 PMCID: PMC7065919 DOI: 10.1016/j.drudis.2019.02.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 01/16/2019] [Accepted: 02/07/2019] [Indexed: 12/18/2022]
Abstract
Natural killer (NK) cells are innate immune lymphocytes with a key role in host defense against HIV infection. Recent advances in chimeric antigen receptors (CARs) have made NK cells a prime target for expressing recombinant receptors capable of redirecting NK cytotoxic functions towards HIV-infected cells. In this review, we discuss the role of NK cells in HIV and the mechanisms of actions of HIV-targeting CAR strategies. Furthermore, we also review NK cells signal transduction and its application to CAR NK cell strategies to develop new combinations of CAR intracellular domains and to improve CAR NK signaling and cytotoxic functions.
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Affiliation(s)
- Giorgio Zenere
- Division of Immunology, Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA 70433, USA
| | - Omalla Allan Olwenyi
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198-5880, USA
| | - Siddappa N Byrareddy
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198-5880, USA; Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE 68198-5880, USA; Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE 68198-5880, USA; Department of Cell Biology and Genetics, University of Nebraska Medical Center, Omaha, NE 68198-5880, USA
| | - Stephen E Braun
- Division of Immunology, Tulane National Primate Research Center, Tulane University School of Medicine, Covington, LA 70433, USA; Department of Pharmacology, Tulane University School of Medicine, New Orleans, LA 70112, USA.
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22
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Ali A, Gyurova IE, Waggoner SN. Mutually assured destruction: the cold war between viruses and natural killer cells. Curr Opin Virol 2019; 34:130-139. [PMID: 30877885 DOI: 10.1016/j.coviro.2019.02.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 01/30/2019] [Accepted: 02/07/2019] [Indexed: 12/22/2022]
Abstract
Natural killer (NK) cells play a multitude of antiviral roles that are significant enough to provoke viral counterefforts to subvert their activity. As innate lymphocytes, NK cells provide a rapid source of pro-inflammatory antiviral cytokines and bring to bear cytolytic activities that are collectively meant to constrain viral replication and dissemination. Additionally, NK cells participate in adaptive immunity both by shaping virus-specific T-cell responses and by developing adaptive features themselves, including enhanced antibody-dependent effector functions. The relative importance of different functional activities of NK cells are poorly understood, thereby obfuscating clinical use of these cells. Here we focus on opposing efforts of NK cells and viruses to gain tactical superiority during infection.
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Affiliation(s)
- Ayad Ali
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, United States; Medical Scientist Training Program, University of Cincinnati College of Medicine, United States; Immunology Graduate Training Program, University of Cincinnati College of Medicine, United States
| | - Ivayla E Gyurova
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, United States; Pathobiology and Molecular Medicine Graduate Program, University of Cincinnati College of Medicine, United States
| | - Stephen N Waggoner
- Center for Autoimmune Genomics and Etiology, Cincinnati Children's Hospital Medical Center, United States; Medical Scientist Training Program, University of Cincinnati College of Medicine, United States; Immunology Graduate Training Program, University of Cincinnati College of Medicine, United States; Pathobiology and Molecular Medicine Graduate Program, University of Cincinnati College of Medicine, United States; Department of Pediatrics, University of Cincinnati College of Medicine, United States.
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Dendle C, Mulley WR, Holdsworth S. Can immune biomarkers predict infections in solid organ transplant recipients? A review of current evidence. Transplant Rev (Orlando) 2018; 33:87-98. [PMID: 30551846 DOI: 10.1016/j.trre.2018.10.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 10/01/2018] [Accepted: 10/02/2018] [Indexed: 12/12/2022]
Abstract
Despite improvements in graft survival, solid organ transplantation is still associated with considerable infection induced morbidity and mortality. If we were able to show that serious infection risk was associated with excessive suppression of immune capacity, we would be justified in "personalizing" the extent of immunosuppression by carefully monitored reduction to see if we can improve immune compromize without increasing the risk of rejection. Reliable biomarkers are needed to identify this patients at an increased risk of infection. This review focuses on the currently available evidence in solid organ transplant recipients for immune non-pathogen specific biomarkers to predict severe infections with the susceptibility to particular pathogens according to the component of the immune system that is suppressed. This review is categorized into immune biomarkers representative of the humoral, cellular, phagocytic, natural killer cell and complement system. Biomarkers humoral and cellular systems of the that have demonstrated an association with infections include immunoglobulins, lymphocyte number, lymphocyte subsets, intracellular concentrations of adenosine triphosphate in stimulated CD4+ cells and soluble CD30. Biomarkers of the innate immune system that have demonstrated an association with infections include natural killer cell numbers, complement and mannose binding lectin. Emerging evidence shows that quantification of viral nucleic acid (such as Epstein Barr Virus) can act as a biomarker to predict all-cause infections. Studies that show the most promise are those in which several immune biomarkers are assessed in combination. Ongoing research is required to validate non-pathogen specific immune biomarkers in multi-centre studies using standardized study designs.
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Affiliation(s)
- Claire Dendle
- Centre for Inflammatory Diseases, School of Clinical Sciences, Monash University and Monash Infectious Diseases, Monash Health, Australia.
| | - William R Mulley
- Centre for Inflammatory Diseases, School of Clinical Sciences, Monash University, Australia; Department of Nephrology, Monash Medical Centre, Clayton, Victoria 3168, Australia.
| | - Stephen Holdsworth
- Centre for Inflammatory Diseases, School of Clinical Sciences, Monash University, Australia; Department of Nephrology, Monash Medical Centre, Clayton, Victoria 3168, Australia.
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24
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Regulation and Function of NK and T Cells During Dengue Virus Infection and Vaccination. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1062:251-264. [PMID: 29845538 PMCID: PMC7121313 DOI: 10.1007/978-981-10-8727-1_18] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The focus of this review is to discuss findings in the last 10 years that have advanced our understanding of human NK cell responses to dengue virus. We will review recently identified interactions of activating and inhibitory receptors on NK cells with dengue virus, human NK responses to natural dengue infection and highlight possible interactions by which NK cells may shape adaptive immune responses. T cell responses to natural dengue infection will be reviewed by Laura Rivino in Chap. 17 . With the advent of numerous dengue vaccine clinical trials, we will also review T and NK cell immune responses to dengue virus vaccination. As our understanding of the diverse functions of NK cell has advanced, it has become increasingly clear that human NK cell responses to viral infections are more complicated than initially recognized.
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Interleukin-27R Signaling Mediates Early Viral Containment and Impacts Innate and Adaptive Immunity after Chronic Lymphocytic Choriomeningitis Virus Infection. J Virol 2018; 92:JVI.02196-17. [PMID: 29593047 PMCID: PMC5974502 DOI: 10.1128/jvi.02196-17] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2017] [Accepted: 03/22/2018] [Indexed: 12/19/2022] Open
Abstract
Chronic viral infections represent a major challenge to the host immune response, and a unique network of immunological elements, including cytokines, are required for their containment. By using a model persistent infection with the natural murine pathogen lymphocytic choriomeningitis virus clone 13 (LCMV Cl13) we investigated the role of one such cytokine, interleukin-27 (IL-27), in the control of chronic infection. We found that IL-27 receptor (IL-27R) signaling promoted control of LCMV Cl13 as early as days 1 and 5 after infection and that il27p28 transcripts were rapidly elevated in multiple subsets of dendritic cells (DCs) and myeloid cells. In particular, plasmacytoid DCs (pDCs), the most potent type 1 interferon (IFN-I)-producing cells, significantly increased il27p28 in a Toll-like receptor 7 (TLR7)-dependent fashion. Notably, mice deficient in an IL-27-specific receptor, WSX-1, exhibited a pleiotropy of innate and adaptive immune alterations after chronic lymphocytic choriomeningitis virus (LCMV) infection, including compromised NK cell cytotoxicity and antibody responses. While, the majority of these immune alterations appeared to be cell extrinsic, cell-intrinsic IL-27R was necessary to maintain early pDC numbers, which, alongside lower IFN-I transcription in CD11b+ DCs and myeloid cells, may explain the compromised IFN-I elevation that we observed early after LCMV Cl13 infection in IL-27R-deficient mice. Together, these data highlight the critical role of IL-27 in enabling optimal antiviral immunity early and late after infection with a systemic persistent virus and suggest that a previously unrecognized positive-feedback loop mediated by IL-27 in pDCs might be involved in this process. IMPORTANCE Persistently replicating pathogens, such as human immunodeficiency virus, hepatitis B virus, and hepatitis C virus, represent major health problems worldwide. These infections impose a long-term challenge on the host immune system, which must be heavily and continuously regulated to keep pathogen replication in check without causing fatal immunopathology. Using a persistently replicating rodent pathogen, LCMV, in its natural host, we identified the cellular sources and effects of one important regulatory pathway, interleukin-27 receptor WSX-1 signaling, that is required for both very early and late restriction of chronic (but not acute) infection. We found that WSX-1 was necessary to promote innate immunity and the development of aberrant adaptive immune responses. This not only highlights the role of IL-27 receptor signaling in regulating distinct host responses that are known to be necessary to control chronic infections, but also positions IL-27 as a potential therapeutic target for their modulation.
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Adenovirus Vector Vaccination Impacts NK Cell Rheostat Function following Lymphocytic Choriomeningitis Virus Infection. J Virol 2018. [PMID: 29514912 PMCID: PMC5952142 DOI: 10.1128/jvi.02103-17] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Natural killer (NK) cells respond rapidly as a first line of defense against infectious pathogens. In addition, NK cells may provide a "rheostat" function and have been shown to reduce the magnitude of antigen-specific T cell responses following infection to avoid immunopathology. However, it remains unknown whether NK cells similarly modulate vaccine-elicited T cell responses following virus challenge. We used the lymphocytic choriomeningitis virus (LCMV) clone 13 infection model to address whether NK cells regulate T cell responses in adenovirus vector-vaccinated mice following challenge. As expected, NK cell depletion in unvaccinated mice resulted in increased virus-specific CD4+ and CD8+ T cell responses and immunopathology following LCMV challenge. In contrast, NK cell depletion had minimal to no impact on antigen-specific T cell responses in mice that were vaccinated with an adenovirus serotype 5 (Ad5)-GP vector prior to LCMV challenge. Moreover, NK cell depletion in vaccinated mice prior to challenge did not result in immunopathology and did not compromise protective efficacy. These data suggest that adenovirus vaccine-elicited T cells may be less sensitive to NK cell rheostat regulation than T cells primed by LCMV infection.IMPORTANCE Recent data have shown that NK cell depletion leads to enhanced virus-elicited T cell responses that can result in severe immunopathology following LCMV infection in mice. In this study, we observed that NK cells exerted minimal to no impact on vaccine-elicited T cells following LCMV challenge, suggesting that adenovirus vaccine-elicited T cells may be less subject to NK cell regulation. These data contribute to our understanding of NK cell regulatory functions and T cell-based vaccines.
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Dustin LB. Innate and Adaptive Immune Responses in Chronic HCV Infection. Curr Drug Targets 2018; 18:826-843. [PMID: 26302811 DOI: 10.2174/1389450116666150825110532] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2015] [Revised: 07/25/2015] [Accepted: 07/27/2015] [Indexed: 12/14/2022]
Abstract
Hepatitis C virus (HCV) remains a public health problem of global importance, even in the era of potent directly-acting antiviral drugs. In this chapter, I discuss immune responses to acute and chronic HCV infection. The outcome of HCV infection is influenced by viral strategies that limit or delay the initiation of innate antiviral responses. This delay may enable HCV to establish widespread infection long before the host mounts effective T and B cell responses. HCV's genetic agility, resulting from its high rate of replication and its error prone replication mechanism, enables it to evade immune recognition. Adaptive immune responses fail to keep up with changing viral epitopes. Neutralizing antibody epitopes may be hidden by decoy structures, glycans, and lipoproteins. T cell responses fail due to changing epitope sequences and due to exhaustion, a phenomenon that may have evolved to limit immune-mediated pathology. Despite these difficulties, innate and adaptive immune mechanisms do impact HCV replication. Immune-mediated clearance of infection is possible, occurring in 20-50% of people who contract the disease. New developments raise hopes for effective immunological interventions to prevent or treat HCV infection.
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Affiliation(s)
- Lynn B Dustin
- University of Oxford, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, Kennedy Institute of Rheumatology, Peter Medawar Building for Pathogen Research, South Parks Road, Oxford OX1 3SY, United Kingdom
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Burrack KS, Huggins MA, Taras E, Dougherty P, Henzler CM, Yang R, Alter S, Jeng EK, Wong HC, Felices M, Cichocki F, Miller JS, Hart GT, Johnson AJ, Jameson SC, Hamilton SE. Interleukin-15 Complex Treatment Protects Mice from Cerebral Malaria by Inducing Interleukin-10-Producing Natural Killer Cells. Immunity 2018; 48:760-772.e4. [PMID: 29625893 DOI: 10.1016/j.immuni.2018.03.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 11/27/2017] [Accepted: 03/05/2018] [Indexed: 12/21/2022]
Abstract
Cerebral malaria is a deadly complication of Plasmodium infection and involves blood brain barrier (BBB) disruption following infiltration of white blood cells. During experimental cerebral malaria (ECM), mice inoculated with Plasmodium berghei ANKA-infected red blood cells develop a fatal CM-like disease caused by CD8+ T cell-mediated pathology. We found that treatment with interleukin-15 complex (IL-15C) prevented ECM, whereas IL-2C treatment had no effect. IL-15C-expanded natural killer (NK) cells were necessary and sufficient for protection against ECM. IL-15C treatment also decreased CD8+ T cell activation in the brain and prevented BBB breakdown without influencing parasite load. IL-15C induced NK cells to express IL-10, which was required for IL-15C-mediated protection against ECM. Finally, we show that ALT-803, a modified human IL-15C, mediates similar induction of IL-10 in NK cells and protection against ECM. These data identify a regulatory role for cytokine-stimulated NK cells in the prevention of a pathogenic immune response.
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Affiliation(s)
- Kristina S Burrack
- Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55414, USA
| | - Matthew A Huggins
- Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55414, USA; Department of Immunology, Mayo Clinic, Rochester, MN 55905, USA
| | - Emily Taras
- Department of Medicine, University of Minnesota, Minneapolis, MN 55414, USA
| | - Philip Dougherty
- Department of Medicine, University of Minnesota, Minneapolis, MN 55414, USA
| | - Christine M Henzler
- Supercomputing Institute for Advanced Computational Research, University of Minnesota, Minneapolis, MN 55414, USA
| | - Rendong Yang
- Supercomputing Institute for Advanced Computational Research, University of Minnesota, Minneapolis, MN 55414, USA
| | - Sarah Alter
- Altor BioScience Corporation, Miramar, FL 33025, USA
| | - Emily K Jeng
- Altor BioScience Corporation, Miramar, FL 33025, USA
| | - Hing C Wong
- Altor BioScience Corporation, Miramar, FL 33025, USA
| | - Martin Felices
- Department of Medicine, University of Minnesota, Minneapolis, MN 55414, USA
| | - Frank Cichocki
- Department of Medicine, University of Minnesota, Minneapolis, MN 55414, USA
| | - Jeffrey S Miller
- Department of Medicine, University of Minnesota, Minneapolis, MN 55414, USA
| | - Geoffrey T Hart
- Center for Immunology, Department of Medicine, University of Minnesota, Minneapolis, MN 55414, USA
| | - Aaron J Johnson
- Department of Immunology, Mayo Clinic, Rochester, MN 55905, USA
| | - Stephen C Jameson
- Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55414, USA
| | - Sara E Hamilton
- Center for Immunology, Department of Laboratory Medicine and Pathology, University of Minnesota, Minneapolis, MN 55414, USA.
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Lee LN, Bolinger B, Banki Z, de Lara C, Highton AJ, Colston JM, Hutchings C, Klenerman P. Adenoviral vaccine induction of CD8+ T cell memory inflation: Impact of co-infection and infection order. PLoS Pathog 2017; 13:e1006782. [PMID: 29281733 PMCID: PMC5760110 DOI: 10.1371/journal.ppat.1006782] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 01/09/2018] [Accepted: 11/29/2017] [Indexed: 12/14/2022] Open
Abstract
The efficacies of many new T cell vaccines rely on generating large populations of long-lived pathogen-specific effector memory CD8 T cells. However, it is now increasingly recognized that prior infection history impacts on the host immune response. Additionally, the order in which these infections are acquired could have a major effect. Exploiting the ability to generate large sustained effector memory (i.e. inflationary) T cell populations from murine cytomegalovirus (MCMV) and human Adenovirus-subtype (AdHu5) 5-beta-galactosidase (Ad-lacZ) vector, the impact of new infections on pre-existing memory and the capacity of the host's memory compartment to accommodate multiple inflationary populations from unrelated pathogens was investigated in a murine model. Simultaneous and sequential infections, first with MCMV followed by Ad-lacZ, generated inflationary populations towards both viruses with similar kinetics and magnitude to mono-infected groups. However, in Ad-lacZ immune mice, subsequent acute MCMV infection led to a rapid decline of the pre-existing Ad-LacZ-specific inflating population, associated with bystander activation of Fas-dependent apoptotic pathways. However, responses were maintained long-term and boosting with Ad-lacZ led to rapid re-expansion of the inflating population. These data indicate firstly that multiple specificities of inflating memory cells can be acquired at different times and stably co-exist. Some acute infections may also deplete pre-existing memory populations, thus revealing the importance of the order of infection acquisition. Importantly, immunization with an AdHu5 vector did not alter the size of the pre-existing memory. These phenomena are relevant to the development of adenoviral vectors as novel vaccination strategies for diverse infections and cancers. (241 words).
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MESH Headings
- Adenovirus Infections, Human/immunology
- Adenovirus Infections, Human/prevention & control
- Adenoviruses, Human/genetics
- Adenoviruses, Human/immunology
- Adenoviruses, Human/pathogenicity
- Animals
- CD8-Positive T-Lymphocytes/immunology
- Coinfection/immunology
- Coinfection/prevention & control
- Epitopes, T-Lymphocyte/genetics
- Epitopes, T-Lymphocyte/immunology
- Herpesviridae Infections/immunology
- Herpesviridae Infections/prevention & control
- Host-Pathogen Interactions/immunology
- Humans
- Immunologic Memory
- Lac Operon
- Mice
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Knockout
- Models, Immunological
- Muromegalovirus/genetics
- Muromegalovirus/immunology
- Muromegalovirus/pathogenicity
- Receptors, Interleukin-18/deficiency
- Receptors, Interleukin-18/genetics
- Receptors, Interleukin-18/immunology
- Viral Vaccines/genetics
- Viral Vaccines/immunology
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Affiliation(s)
- Lian N. Lee
- Peter Medawar Building and Translational Gastroenterology Unit, Oxford, United Kingdom
| | - Beatrice Bolinger
- Peter Medawar Building and Translational Gastroenterology Unit, Oxford, United Kingdom
- Schweizerischer Apothekerverband, pharmaSuisse, Bern, Switzerland
| | - Zoltan Banki
- Peter Medawar Building and Translational Gastroenterology Unit, Oxford, United Kingdom
- Division of Virology, Innsbruck Medical University, Innsbruck, Austria
| | - Catherine de Lara
- Peter Medawar Building and Translational Gastroenterology Unit, Oxford, United Kingdom
| | - Andrew J. Highton
- Peter Medawar Building and Translational Gastroenterology Unit, Oxford, United Kingdom
| | - Julia M. Colston
- Peter Medawar Building and Translational Gastroenterology Unit, Oxford, United Kingdom
| | - Claire Hutchings
- Peter Medawar Building and Translational Gastroenterology Unit, Oxford, United Kingdom
| | - Paul Klenerman
- Peter Medawar Building and Translational Gastroenterology Unit, Oxford, United Kingdom
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30
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Chapel A, Garcia-Beltran WF, Hölzemer A, Ziegler M, Lunemann S, Martrus G, Altfeld M. Peptide-specific engagement of the activating NK cell receptor KIR2DS1. Sci Rep 2017; 7:2414. [PMID: 28546555 PMCID: PMC5445099 DOI: 10.1038/s41598-017-02449-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 04/11/2017] [Indexed: 01/10/2023] Open
Abstract
The activating NK cell receptor KIR2DS1 has been shown to be involved in many disorders including autoimmune diseases, malignancies and pregnancy outcomes. However, the precise ligands and functions of this receptor remain unclear. We aimed to gain a better understanding of the factors involved in the binding of KIR2DS1 and its inhibitory counterpart KIR2DL1 to HLA class I molecules, and the consequences for KIR2DS1+ NK-cell function. A systematic screen that assessed binding to 97 HLA-I proteins confirmed that KIR2DS1-binding was narrowly restricted to HLA-C group 2 complexes, while KIR2DL1 showed a broader binding specificity. Using KIR2DS1ζ+ Jurkat reporter-cells and peptide-pulsed 721.221.TAP1KO-HLA-C*06:02 cells, we identified the synthetic peptide SRGPVHHLL presented by HLA-C*06:02 that strongly engaged KIR2DS1- and KIR2DL1-binding. Functional analysis showed that this HLA-C*06:02-presented peptide can furthermore activate primary KIR2DS1(+) NK cell clones. Thus, we demonstrated peptide-dependent binding of the activating NK cell receptor KIR2DS1, providing new insights into the underlying mechanisms involved in KIR2DS1-related disorders.
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Affiliation(s)
- Anaïs Chapel
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | | | - Angelique Hölzemer
- Department of Internal Medicine, University Hospital Eppendorf (UKE), Hamburg, Germany
| | - Maja Ziegler
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Sebastian Lunemann
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Gloria Martrus
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Marcus Altfeld
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany.
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31
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Frenkel D, Zhang F, Guirnalda P, Haynes C, Bockstal V, Radwanska M, Magez S, Black SJ. Trypanosoma brucei Co-opts NK Cells to Kill Splenic B2 B Cells. PLoS Pathog 2016; 12:e1005733. [PMID: 27403737 PMCID: PMC4942092 DOI: 10.1371/journal.ppat.1005733] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Accepted: 06/08/2016] [Indexed: 11/19/2022] Open
Abstract
After infection with T. brucei AnTat 1.1, C57BL/6 mice lost splenic B2 B cells and lymphoid follicles, developed poor parasite-specific antibody responses, lost weight, became anemic and died with fulminating parasitemia within 35 days. In contrast, infected C57BL/6 mice lacking the cytotoxic granule pore-forming protein perforin (Prf1-/-) retained splenic B2 B cells and lymphoid follicles, developed high-titer antibody responses against many trypanosome polypeptides, rapidly suppressed parasitemia and did not develop anemia or lose weight for at least 60 days. Several lines of evidence show that T. brucei infection-induced splenic B cell depletion results from natural killer (NK) cell-mediated cytotoxicity: i) B2 B cells were depleted from the spleens of infected intact, T cell deficient (TCR-/-) and FcγRIIIa deficient (CD16-/-) C57BL/6 mice excluding a requirement for T cells, NKT cell, or antibody-dependent cell-mediated cytotoxicity; ii) administration of NK1.1 specific IgG2a (mAb PK136) but not irrelevant IgG2a (myeloma M9144) prevented infection-induced B cell depletion consistent with a requirement for NK cells; iii) splenic NK cells but not T cells or NKT cells degranulated in infected C57BL/6 mice co-incident with B cell depletion evidenced by increased surface expression of CD107a; iv) purified NK cells from naïve C57BL/6 mice killed purified splenic B cells from T. brucei infected but not uninfected mice in vitro indicating acquisition of an NK cell activating phenotype by the post-infection B cells; v) adoptively transferred C57BL/6 NK cells prevented infection-induced B cell population growth in infected Prf1-/- mice consistent with in vivo B cell killing; vi) degranulated NK cells in infected mice had altered gene and differentiation antigen expression and lost cytotoxic activity consistent with functional exhaustion, but increased in number as infection progressed indicating continued generation. We conclude that NK cells in T. brucei infected mice kill B cells, suppress humoral immunity and expedite early mortality.
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Affiliation(s)
- Deborah Frenkel
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, United States of America
| | - Fengqiu Zhang
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, United States of America
| | - Patrick Guirnalda
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, United States of America
| | - Carole Haynes
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, United States of America
- Laboratory for Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Viki Bockstal
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, United States of America
- Laboratory for Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium
| | | | - Stefan Magez
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, United States of America
- Laboratory for Cellular and Molecular Immunology, Vrije Universiteit Brussel, Brussels, Belgium
- Department of Structural Biology, Vrije Universiteit Brussel, Brussels, Belgium
| | - Samuel J. Black
- Department of Veterinary and Animal Sciences, University of Massachusetts Amherst, Amherst, Massachusetts, United States of America
- * E-mail:
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32
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Stegmann KA, Robertson F, Hansi N, Gill U, Pallant C, Christophides T, Pallett LJ, Peppa D, Dunn C, Fusai G, Male V, Davidson BR, Kennedy P, Maini MK. CXCR6 marks a novel subset of T-bet(lo)Eomes(hi) natural killer cells residing in human liver. Sci Rep 2016; 6:26157. [PMID: 27210614 PMCID: PMC4876507 DOI: 10.1038/srep26157] [Citation(s) in RCA: 181] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Accepted: 04/27/2016] [Indexed: 12/15/2022] Open
Abstract
Natural killer cells (NK) are highly enriched in the human liver, where they can regulate immunity and immunopathology. We probed them for a liver-resident subset, distinct from conventional bone-marrow-derived NK. CXCR6+ NK were strikingly enriched in healthy and diseased liver compared to blood (p < 0.0001). Human hepatic CXCR6+ NK had an immature phenotype (predominantly CD56brightCD16−CD57−), and expressed the tissue-residency marker CD69. CXCR6+ NK produced fewer cytotoxic mediators and pro-inflammatory cytokines than the non-liver-specific CXCR6− fraction. Instead CXCR6+ NK could upregulate TRAIL, a key death ligand in hepatitis pathogenesis. CXCR6 demarcated liver NK into two transcriptionally distinct populations: T-bethiEomeslo(CXCR6−) and T-betloEomeshi(CXCR6+); the latter was virtually absent in the periphery. The small circulating CXCR6+ subset was predominantly T-bethiEomeslo, suggesting its lineage was closer to CXCR6− peripheral than CXCR6+ liver NK. These data reveal a large subset of human liver-resident T-betloEomeshi NK, distinguished by their surface expression of CXCR6, adapted for hepatic tolerance and inducible anti-viral immunity.
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Affiliation(s)
- Kerstin A Stegmann
- Division of Infection and Immunity and Institute of Immunity and Transplantation, UCL, London, UK
| | - Francis Robertson
- Department of Surgery and Interventional Science, UCL, Royal Free Hospital London, London, United Kingdom
| | - Navjyot Hansi
- Centre for Digestive Diseases, Blizard Institute, Bart's and the London School of Medicine and Dentistry, London, UK
| | - Upkar Gill
- Centre for Digestive Diseases, Blizard Institute, Bart's and the London School of Medicine and Dentistry, London, UK
| | - Celeste Pallant
- Division of Infection and Immunity and Institute of Immunity and Transplantation, UCL, London, UK
| | - Theodoros Christophides
- Division of Infection and Immunity and Institute of Immunity and Transplantation, UCL, London, UK
| | - Laura J Pallett
- Division of Infection and Immunity and Institute of Immunity and Transplantation, UCL, London, UK
| | - Dimitra Peppa
- Division of Infection and Immunity and Institute of Immunity and Transplantation, UCL, London, UK
| | - Claire Dunn
- Division of Infection and Immunity and Institute of Immunity and Transplantation, UCL, London, UK
| | - Giuseppe Fusai
- Department of Surgery and Interventional Science, UCL, Royal Free Hospital London, London, United Kingdom
| | - Victoria Male
- Division of Infection and Immunity and Institute of Immunity and Transplantation, UCL, London, UK
| | - Brian R Davidson
- Department of Surgery and Interventional Science, UCL, Royal Free Hospital London, London, United Kingdom
| | - Patrick Kennedy
- Centre for Digestive Diseases, Blizard Institute, Bart's and the London School of Medicine and Dentistry, London, UK
| | - Mala K Maini
- Division of Infection and Immunity and Institute of Immunity and Transplantation, UCL, London, UK
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Townsley E, O'Connor G, Cosgrove C, Woda M, Co M, Thomas SJ, Kalayanarooj S, Yoon I, Nisalak A, Srikiatkhachorn A, Green S, Stephens HAF, Gostick E, Price DA, Carrington M, Alter G, McVicar DW, Rothman AL, Mathew A. Interaction of a dengue virus NS1-derived peptide with the inhibitory receptor KIR3DL1 on natural killer cells. Clin Exp Immunol 2016; 183:419-30. [PMID: 26439909 PMCID: PMC4750593 DOI: 10.1111/cei.12722] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/04/2015] [Indexed: 12/26/2022] Open
Abstract
Killer immunoglobulin-like receptors (KIRs) interact with human leucocyte antigen (HLA) class I ligands and play a key role in the regulation and activation of NK cells. The functional importance of KIR-HLA interactions has been demonstrated for a number of chronic viral infections, but to date only a few studies have been performed in the context of acute self-limited viral infections. During our investigation of CD8(+) T cell responses to a conserved HLA-B57-restricted epitope derived from dengue virus (DENV) non-structural protein-1 (NS1), we observed substantial binding of the tetrameric complex to non-T/non-B lymphocytes in peripheral blood mononuclear cells (PBMC) from a long-standing clinical cohort in Thailand. We confirmed binding of the NS1 tetramer to CD56(dim) NK cells, which are known to express KIRs. Using depletion studies and KIR-transfected cell lines, we demonstrated further that the NS1 tetramer bound the inhibitory receptor KIR3DL1. Phenotypical analysis of PBMC from HLA-B57(+) subjects with acute DENV infection revealed marked activation of NS1 tetramer-binding natural killer (NK) cells around the time of defervescence in subjects with severe dengue disease. Collectively, our findings indicate that subsets of NK cells are activated relatively late in the course of acute DENV illness and reveal a possible role for specific KIR-HLA interactions in the modulation of disease outcomes.
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Affiliation(s)
- E. Townsley
- Division of Infectious Diseases and ImmunologyUniversity of Massachusetts Medical SchoolWorcesterMAUSA
| | - G. O'Connor
- Cancer and Inflammation Program, Laboratory of Experimental ImmunologyLeidos Biomedical Research Inc., Frederick National Laboratory for Cancer ResearchFrederickMDUSA
| | - C. Cosgrove
- Ragon Institute at MGH, MIT And HarvardMassachusetts General Hospital, Harvard Medical SchoolBostonMAUSA
| | - M. Woda
- Division of Infectious Diseases and ImmunologyUniversity of Massachusetts Medical SchoolWorcesterMAUSA
| | - M. Co
- Division of Infectious Diseases and ImmunologyUniversity of Massachusetts Medical SchoolWorcesterMAUSA
| | - S. J. Thomas
- Walter Reed Army Institute of ResearchSilver SpringMDUSA
| | - S. Kalayanarooj
- Queen Sirikit National Institute for Child HealthBangkokThailand
| | - I.‐K. Yoon
- Department of VirologyArmed Forces Research Institute of Medical SciencesBangkokThailand
| | - A. Nisalak
- Department of VirologyArmed Forces Research Institute of Medical SciencesBangkokThailand
| | - A. Srikiatkhachorn
- Division of Infectious Diseases and ImmunologyUniversity of Massachusetts Medical SchoolWorcesterMAUSA
| | - S. Green
- Division of Infectious Diseases and ImmunologyUniversity of Massachusetts Medical SchoolWorcesterMAUSA
| | - H. A. F. Stephens
- Centre for Nephrology and the Anthony Nolan TrustRoyal Free Campus, University CollegeLondonUK
| | - E. Gostick
- Cardiff University School of MedicineInstitute of Infection and ImmunityCardiffUK
| | - D. A. Price
- Cardiff University School of MedicineInstitute of Infection and ImmunityCardiffUK
- Human Immunology Section, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of HealthBethesdaMDUSA
| | - M. Carrington
- Cancer and Inflammation Program, Laboratory of Experimental ImmunologyLeidos Biomedical Research Inc., Frederick National Laboratory for Cancer ResearchFrederickMDUSA
- Ragon Institute at MGH, MIT And HarvardMassachusetts General Hospital, Harvard Medical SchoolBostonMAUSA
| | - G. Alter
- Ragon Institute at MGH, MIT And HarvardMassachusetts General Hospital, Harvard Medical SchoolBostonMAUSA
| | - D. W. McVicar
- Cancer and Inflammation Program, Laboratory of Experimental ImmunologyLeidos Biomedical Research Inc., Frederick National Laboratory for Cancer ResearchFrederickMDUSA
| | - A. L. Rothman
- Institute for Immunology and Informatics, University of Rhode IslandProvidenceRIUSA
| | - A. Mathew
- Division of Infectious Diseases and ImmunologyUniversity of Massachusetts Medical SchoolWorcesterMAUSA
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Luci C, Bekri S, Bihl F, Pini J, Bourdely P, Nouhen K, Malgogne A, Walzer T, Braud VM, Anjuère F. NKp46+ Innate Lymphoid Cells Dampen Vaginal CD8 T Cell Responses following Local Immunization with a Cholera Toxin-Based Vaccine. PLoS One 2015; 10:e0143224. [PMID: 26630176 PMCID: PMC4668070 DOI: 10.1371/journal.pone.0143224] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 11/02/2015] [Indexed: 01/06/2023] Open
Abstract
Innate and adaptive immune cells work in concert to generate efficient protection at mucosal surface. Vaginal mucosa is an epithelial tissue that contains innate and adaptive immune effector cells. Our previous studies demonstrated that vaginal administration of Cholera toxin -based vaccines generate antigen-specific CD8 T cells through the stimulation of local dendritic cells (DC). Innate lymphoid cells (ILC) are a group of lymphocytes localized in epithelial tissues that have important immune functions against pathogens and in tissue homeostasis. Their contribution to vaccine-induced mucosal T cell responses is an important issue for the design of protective vaccines. We report here that the vaginal mucosa contains a heterogeneous population of NKp46+ ILC that includes conventional NK cells and ILC1-like cells. We show that vaginal NKp46+ ILC dampen vaccine-induced CD8 T cell responses generated after local immunization. Indeed, in vivo depletion of NKp46+ ILC with anti-NK1.1 antibody or NKG2D blockade increases the magnitude of vaginal OVA-specific CD8 T cells. Furthermore, such treatments also increase the number of DC in the vagina. NKG2D ligands being expressed by vaginal DC but not by CD8 T cells, these results support that NKp46+ ILC limit mucosal CD8 T cell responses indirectly through the NKG2D-dependent elimination of vaginal DC. Our data reveal an unappreciated role of NKp46+ ILC in the regulation of mucosal CD8 T cell responses.
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Affiliation(s)
- Carmelo Luci
- Université de Nice Sophia Antipolis, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7275, Sophia Antipolis, France
- Institut National de la Santé et de la Recherche Médicale, Institut de Pharmacologie Moléculaire et Cellulaire, France
- * E-mail:
| | - Selma Bekri
- Université de Nice Sophia Antipolis, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7275, Sophia Antipolis, France
| | - Franck Bihl
- Université de Nice Sophia Antipolis, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7275, Sophia Antipolis, France
| | - Jonathan Pini
- Université de Nice Sophia Antipolis, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7370, Laboratoire de PhysioMédecine Moléculaire, Nice, France
| | - Pierre Bourdely
- Université de Nice Sophia Antipolis, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7275, Sophia Antipolis, France
| | - Kelly Nouhen
- Université de Nice Sophia Antipolis, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7275, Sophia Antipolis, France
| | - Angélique Malgogne
- Université de Nice Sophia Antipolis, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7275, Sophia Antipolis, France
| | - Thierry Walzer
- Université de Lyon 1, Ecole Normale Supérieure de Lyon, Institut National de la Santé et de la Recherche Médicale U1111, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 5308, Centre International de recherche en infectiologie, Lyon, France
| | - Véronique M. Braud
- Université de Nice Sophia Antipolis, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7275, Sophia Antipolis, France
| | - Fabienne Anjuère
- Université de Nice Sophia Antipolis, Institut de Pharmacologie Moléculaire et Cellulaire, Sophia Antipolis, France
- Centre National de la Recherche Scientifique, Unité Mixte de Recherche 7275, Sophia Antipolis, France
- Institut National de la Santé et de la Recherche Médicale, Institut de Pharmacologie Moléculaire et Cellulaire, France
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Waggoner SN, Reighard SD, Gyurova IE, Cranert SA, Mahl SE, Karmele EP, McNally JP, Moran MT, Brooks TR, Yaqoob F, Rydyznski CE. Roles of natural killer cells in antiviral immunity. Curr Opin Virol 2015; 16:15-23. [PMID: 26590692 PMCID: PMC4821726 DOI: 10.1016/j.coviro.2015.10.008] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 10/20/2015] [Accepted: 10/24/2015] [Indexed: 01/01/2023]
Abstract
NK cells can kill virus-infected cells and protect against severe infections. Long-lived memory NK cells may develop after vaccination or infection. NK cells are potent regulatory of antiviral T and B cell responses. The role of NK cells in human infection is complex and context-dependent.
Natural killer (NK) cells are important in immune defense against virus infections. This is predominantly considered a function of rapid, innate NK-cell killing of virus-infected cells. However, NK cells also prime other immune cells through the release of interferon gamma (IFN-γ) and other cytokines. Additionally, NK cells share features with long-lived adaptive immune cells and can impact disease pathogenesis through the inhibition of adaptive immune responses by virus-specific T and B cells. The relative contributions of these diverse and conflicting functions of NK cells in humans are poorly defined and likely context-dependent, thereby complicating the development of therapeutic interventions. Here we focus on the contributions of NK cells to disease in diverse virus infections germane to human health.
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Affiliation(s)
- Stephen N Waggoner
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States; Immunology Graduate Program, University of Cincinnati, Cincinnati, OH, United States; Medical Scientist Training Program, University of Cincinnati, Cincinnati, OH, United States; Pathobiology and Molecular Medicine Graduate Program, University of Cincinnati, Cincinnati, OH, United States.
| | - Seth D Reighard
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States; Immunology Graduate Program, University of Cincinnati, Cincinnati, OH, United States; Medical Scientist Training Program, University of Cincinnati, Cincinnati, OH, United States
| | - Ivayla E Gyurova
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States; Pathobiology and Molecular Medicine Graduate Program, University of Cincinnati, Cincinnati, OH, United States
| | - Stacey A Cranert
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Sarah E Mahl
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Erik P Karmele
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Jonathan P McNally
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Michael T Moran
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States; Immunology Graduate Program, University of Cincinnati, Cincinnati, OH, United States
| | - Taylor R Brooks
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Fazeela Yaqoob
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States; Immunology Graduate Program, University of Cincinnati, Cincinnati, OH, United States
| | - Carolyn E Rydyznski
- Center for Autoimmune Genomics and Etiology (CAGE), Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States; Immunology Graduate Program, University of Cincinnati, Cincinnati, OH, United States
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Abstract
Natural killer (NK) cells are traditionally regarded as first-line effectors of the innate immune response, but they also have a distinct role in chronic infection. Here, we review the role of NK cells against hepatitis C virus (HCV) and hepatitis B virus (HBV), two agents that cause acute and chronic hepatitis in humans. Interest in NK cells was initially sparked by genetic studies that demonstrated an association between NK cell-related genes and the outcome of HCV infection. Viral hepatitis also provides a model to study the NK cell response to both endogenous and exogenous type I interferon (IFN). Levels of IFN-stimulated genes increase in both acute and chronic HCV infection and pegylated IFNα has been the mainstay of HCV and HBV treatment for decades. In chronic viral hepatitis, NK cells display decreased production of antiviral cytokines. This phenotype is found in both HCV and HBV infection but is induced by different mechanisms. Potent antivirals now provide the opportunity to study the reversibility of the suppressed cytokine production of NK cells in comparison with the antigen-induced defect in IFNγ and tumor necrosis factor-α production of virus-specific T cells. This has implications for immune reconstitution in other conditions of chronic inflammation and immune exhaustion, such as human immunodeficiency virus infection and cancer.
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Affiliation(s)
- Barbara Rehermann
- Correspondence Address correspondence to: Barbara Rehermann, MD, Immunology Section, Liver Diseases Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, DHHS, Bethesda, Maryland 20892. fax: 301-402-0491.Immunology SectionLiver Diseases BranchNational Institute of Diabetes and Digestive and Kidney DiseasesNational Institutes of HealthDHHSBethesdaMaryland 20892
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37
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Fausther-Bovendo H, Kobinger GP. Pre-existing immunity against Ad vectors: humoral, cellular, and innate response, what's important? Hum Vaccin Immunother 2015; 10:2875-84. [PMID: 25483662 PMCID: PMC5443060 DOI: 10.4161/hv.29594] [Citation(s) in RCA: 169] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Pre-existing immunity against human adenovirus (HAd) serotype 5 derived vector in the human population is widespread, thus hampering its clinical use. Various components of the immune system, including neutralizing antibodies (nAbs), Ad specific T cells and type I IFN activated NK cells, contribute to dampening the efficacy of Ad vectors in individuals with pre-existing Ad immunity. In order to circumvent pre-existing immunity to adenovirus, numerous strategies, such as developing alternative Ad serotypes, varying immunization routes and utilizing prime-boost regimens, are under pre-clinical or clinical phases of development. However, these strategies mainly focus on one arm of pre-existing immunity. Selection of alternative serotypes has been largely driven by the absence in the human population of nAbs against them with little attention paid to cross-reactive Ad specific T cells. Conversely, varying the route of immunization appears to mainly rely on avoiding Ad specific tissue-resident T cells. Finally, prime-boost regimens do not actually circumvent pre-existing immunity but instead generate immune responses of sufficient magnitude to confer protection despite pre-existing immunity. Combining the above strategies and thus taking into account all components regulating pre-existing Ad immunity will help further improve the development of Ad vectors for animal and human use.
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Rydyznski CE, Waggoner SN. Boosting vaccine efficacy the natural (killer) way. Trends Immunol 2015; 36:536-46. [PMID: 26272882 DOI: 10.1016/j.it.2015.07.004] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2015] [Revised: 07/15/2015] [Accepted: 07/16/2015] [Indexed: 12/19/2022]
Abstract
Coordination of the innate and adaptive immune systems is paramount to the development of protective humoral and cellular immunity following vaccination. Natural killer (NK) cells are front-line soldiers of the innate immune system, and recent studies have revealed functions for NK cells in long-lived immune memory and the regulation of adaptive immune responses. These findings suggest that NK cells may play important roles in the development of efficacious vaccines, as well as, in some contexts, failed immunizations. Here, we review the current understanding of the immunomodulatory and memory differentiation capabilities of NK cells. We examine the context dependency of the mechanisms and the nature of NK cell-mediated modulation of the immune response, and discuss how these insights may impact immunization strategies and the development of next-generation vaccines.
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Affiliation(s)
- Carolyn E Rydyznski
- Center for Autoimmune Genomics and Etiology (CAGE) and Immunology Graduate Program, Cincinnati Children's Hospital Medical Center, 240 Albert Sabin Way, S6.214, MLC 15012, Cincinnati, OH 45229, USA
| | - Stephen N Waggoner
- Center for Autoimmune Genomics and Etiology (CAGE) and Immunology Graduate Program, Cincinnati Children's Hospital Medical Center, 240 Albert Sabin Way, S6.214, MLC 15012, Cincinnati, OH 45229, USA.
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Chivero ET, Bhattarai N, McLinden JH, Xiang J, Stapleton JT. Human Pegivirus (HPgV; formerly known as GBV-C) inhibits IL-12 dependent natural killer cell function. Virology 2015; 485:116-27. [PMID: 26245365 DOI: 10.1016/j.virol.2015.07.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2015] [Revised: 07/02/2015] [Accepted: 07/13/2015] [Indexed: 02/06/2023]
Abstract
Human Pegivirus (HPgV, formally GB virus C) infects lymphocytes and NK cells in vivo, and infection is associated with reduced T cell and NK cell activation in HIV-infected individuals. The mechanism by which HPgV inhibits NK cell activation has not been assessed. Following IL-12 stimulation, IFNγ expression was lower in HIV-HPgV co-infected subjects compared to HIV mono-infected subjects (p=0.02). In addition, HPgV positive human sera, extracellular vesicles containing E2 protein, recombinant E2 protein and synthetic E2 peptides containing a predicted Tyk2 interacting motif inhibited NK cell IL-12-mediated IFNγ release. E2 protein also inhibited Tyk2 activation following IL-12 stimulation. In contrast, cytolytic NK cell function was not altered by HPgV. Inhibition of NK cell-induced proinflammatory/antiviral cytokines may contribute to both HPgV persistence and reduced immune activation during HIV-coinfection. Understanding mechanisms by which HPgV alters immune activation may contribute towards novel immunomodulatory therapies to treat HIV and inflammatory diseases.
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Affiliation(s)
- Ernest T Chivero
- The Iowa City Veterans Affairs Medical Center The University of Iowa, Iowa City, IA 52242, USA; Interdisciplinary program in Molecular and Cellular Biology, The University of Iowa, Iowa City, IA 52242, USA
| | - Nirjal Bhattarai
- The Iowa City Veterans Affairs Medical Center The University of Iowa, Iowa City, IA 52242, USA; Department of Internal Medicine, The University of Iowa, Iowa City, IA 52242, USA
| | - James H McLinden
- The Iowa City Veterans Affairs Medical Center The University of Iowa, Iowa City, IA 52242, USA; Department of Internal Medicine, The University of Iowa, Iowa City, IA 52242, USA
| | - Jinhua Xiang
- The Iowa City Veterans Affairs Medical Center The University of Iowa, Iowa City, IA 52242, USA; Department of Internal Medicine, The University of Iowa, Iowa City, IA 52242, USA
| | - Jack T Stapleton
- The Iowa City Veterans Affairs Medical Center The University of Iowa, Iowa City, IA 52242, USA; Interdisciplinary program in Molecular and Cellular Biology, The University of Iowa, Iowa City, IA 52242, USA; Department of Internal Medicine, The University of Iowa, Iowa City, IA 52242, USA; Department of Microbiology, The University of Iowa, Iowa City, IA 52242, USA.
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Oth T, Van Elssen CHMJ, Schnijderberg MCA, Senden-Gijsbers BLMG, Germeraad WTV, Bos GMJ, Vanderlocht J. Potency of Both Human Th1 and NK Helper Cell Activation is Determined by IL-12p70-Producing PAMP-Matured DCs. J Interferon Cytokine Res 2015; 35:748-58. [PMID: 26134473 DOI: 10.1089/jir.2015.0022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Besides T helper (Th) cells, natural killer (NK) cells have also been described to participate in the shaping of dendritic cell (DC)-mediated adaptive immune responses. At present, it remains unclear to what extent the induction of these NK helper cell immune mechanisms is coupled with Th responses and whether both helper immune responses are induced by the same DC upon specific pathogen recognition receptor (PRR) stimulation. In this study, we demonstrate that maturation of DCs with a cocktail containing FMKp (membrane fragments of Klebsiella pneumoniae) mounts both Th cell and NK cell helper responses in a PRR-triggered dose-dependent manner as determined by the capacity of the helper cells to produce IFN-γ. Furthermore, by triggering an additional PRR pathway [FMKp in combination with poly(I:C) lyovec], we reveal that both approaches modulate the amount of DC-derived IL-12p70 and that this cytokine is the key determinant of the DC-induced Th1 and NK cell helper responses. Moreover, all PRR triggers able to induce IL-12-producing mature DCs are sufficient to induce these helper responses. We propose the existence of a single program used by DCs to induce potent cellular immune responses by stimulating both T helper and NK cell helper processes. This knowledge can help to select the proper PRR triggers in preventive and therapeutic vaccine design.
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Affiliation(s)
- Tammy Oth
- 1 Division of Hematology, Department of Internal Medicine, School of Oncology and Developmental Biology, Maastricht University Medical Center+ , Maastricht, The Netherlands
| | - Catharina H M J Van Elssen
- 1 Division of Hematology, Department of Internal Medicine, School of Oncology and Developmental Biology, Maastricht University Medical Center+ , Maastricht, The Netherlands
| | - Melanie C A Schnijderberg
- 1 Division of Hematology, Department of Internal Medicine, School of Oncology and Developmental Biology, Maastricht University Medical Center+ , Maastricht, The Netherlands
| | - Birgit L M G Senden-Gijsbers
- 1 Division of Hematology, Department of Internal Medicine, School of Oncology and Developmental Biology, Maastricht University Medical Center+ , Maastricht, The Netherlands
| | - Wilfred T V Germeraad
- 1 Division of Hematology, Department of Internal Medicine, School of Oncology and Developmental Biology, Maastricht University Medical Center+ , Maastricht, The Netherlands
| | - Gerard M J Bos
- 1 Division of Hematology, Department of Internal Medicine, School of Oncology and Developmental Biology, Maastricht University Medical Center+ , Maastricht, The Netherlands
| | - Joris Vanderlocht
- 2 Tissue Typing Laboratory, Department of Transplantation Immunology, School of Oncology and Developmental Biology, Maastricht University Medical Center+ , Maastricht, The Netherlands
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Cytokine-Mediated Activation of NK Cells during Viral Infection. J Virol 2015; 89:7922-31. [PMID: 25995253 DOI: 10.1128/jvi.00199-15] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Accepted: 05/15/2015] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED Natural killer (NK) cells provide a first line of defense against infection via the production of antiviral cytokines and direct lysis of target cells. Cytokines such as interleukin 12 (IL-12) and IL-18 are critical regulators of NK cell activation, but much remains to be learned about how cytokines interact to regulate NK cell function. Here, we have examined cytokine-mediated activation of NK cells during infection with two natural mouse pathogens, lymphocytic choriomeningitis virus (LCMV) and murine cytomegalovirus (MCMV). Using a systematic screen of 1,849 cytokine pairs, we identified the most potent combinations capable of eliciting gamma interferon (IFN-γ) production in NK cells. We observed that NK cell responses to cytokine stimulation were reduced 8 days after acute LCMV infection but recovered to preinfection levels by 60 days postinfection. In contrast, during MCMV infection, NK cell responses to cytokines remained robust at all time points examined. Ly49H-positive (Ly49H+) NK cells recognizing viral ligand m157 showed preferential proliferation during early MCMV infection. A population of these cells was still detected beyond 60 days postinfection, but these divided cells did not demonstrate enhanced IFN-γ production in response to innate cytokine stimulation. Instead, the maturation state of the NK cells (as determined by CD11b or CD27 surface phenotype) was predictive of responsiveness to cytokines, regardless of Ly49H expression. These results help define cytokine interactions that regulate NK cell activation and highlight variations in NK cell function during two unrelated viral infections. IMPORTANCE Natural killer cells play an important role in immunity to many viral infections. From an initial screen of 1,849 cytokine pairs, we identified the most stimulatory cytokine combinations capable of inducing IFN-γ production by NK cells. Ly49H+ NK cells, which can be directly activated by MCMV protein m157, preferentially proliferated during MCMV infection but did not show enhanced IFN-γ production following direct ex vivo cytokine stimulation. Instead, mature CD11b+ and/or CD27+ NK cells responded similarly to innate cytokine stimulation regardless of Ly49H expression. Collectively, our data provide a better foundation for understanding cytokine-mediated NK cell activation during viral infection.
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42
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Cook KD, Kline HC, Whitmire JK. NK cells inhibit humoral immunity by reducing the abundance of CD4+ T follicular helper cells during a chronic virus infection. J Leukoc Biol 2015; 98:153-62. [PMID: 25986014 DOI: 10.1189/jlb.4hi1214-594r] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2014] [Accepted: 03/31/2015] [Indexed: 01/06/2023] Open
Abstract
There is a need to understand better how to improve B cell responses and immunity to persisting virus infections, which often cause debilitating illness or death. People with chronic virus infection show evidence of improved virus control when there is a strong neutralizing antibody response, and conversely, B cell dysfunction is associated with higher viral loads. We showed previously that NK cells inhibit CD4(+) and CD8(+) T cell responses to disseminating LCMV infection and that depletion of NK cells attenuates chronic infection. Here, we examined the effect of NK cell depletion on B cell responses to LCMV infection in mice. Whereas mice infected acutely generated a peak level of antibody soon after the infection was resolved, mice infected chronically showed a continued increase in antibody levels that exceeded those after acute infection. We found that early NK cell depletion rapidly increased virus-specific antibody levels to chronic infection, and this effect depended on CD4(+) T cells and was associated with elevated numbers of CXCR5(+)CD4(+) TFH cells. However, the NK cell-depleted mice controlled the infection and by 1 mo pi, had lower TFH cell numbers and antibody levels compared with mice with sustained infection. Finally, we show that NK cell depletion improved antiviral CD8(+) T cell responses only when B cells and virus-specific antibody were present. Our data indicate that NK cells diminish immunity to chronic infection, in part, by suppressing TFH cell and antibody responses.
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Affiliation(s)
- Kevin D Cook
- *Department of Genetics and Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Hannah C Kline
- *Department of Genetics and Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
| | - Jason K Whitmire
- *Department of Genetics and Department of Microbiology and Immunology, University of North Carolina School of Medicine, Chapel Hill, North Carolina, USA
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Generation of cellular immune memory and B-cell immunity is impaired by natural killer cells. Nat Commun 2015; 6:6375. [PMID: 25721802 PMCID: PMC4346304 DOI: 10.1038/ncomms7375] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 01/19/2015] [Indexed: 12/17/2022] Open
Abstract
The goal of most vaccines is the induction of long-lived memory T and B cells capable of protecting the host from infection by cytotoxic mechanisms, cytokines and high-affinity antibodies. However, efforts to develop vaccines against major human pathogens like HIV and HCV have not been successful, thereby highlighting the need for novel approaches to circumvent immunoregulatory mechanisms that limit induction of protective immunity. Here we show that mouse natural killer (NK) cells inhibit generation of long-lived virus-specific memory T- and B-cells as well as virus-specific antibody production after acute infection. Mechanistically, NK cells suppressed CD4 T cells and follicular helper T cells (TFH) in a perforin-dependent manner during the first few days of infection, resulting in a weaker germinal center (GC) response and diminished immune memory. We anticipate that innovative strategies to relieve NK cell-mediated suppression of immunity should facilitate development of efficacious new vaccines targeting difficult-to-prevent infections.
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Chivero ET, Stapleton JT. Tropism of human pegivirus (formerly known as GB virus C/hepatitis G virus) and host immunomodulation: insights into a highly successful viral infection. J Gen Virol 2015; 96:1521-32. [PMID: 25667328 DOI: 10.1099/vir.0.000086] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Human pegivirus (HPgV; originally called GB virus C/hepatitis G virus) is an RNA virus within the genus Pegivirus of the family Flaviviridae that commonly causes persistent infection. Worldwide, ~750 million people are actively infected (viraemic) and an estimated 0.75-1.5 billion people have evidence of prior HPgV infection. No causal association between HPgV and disease has been identified; however, several studies described a beneficial relationship between persistent HPgV infection and survival in individuals infected with human immunodeficiency virus. The beneficial effect appeared to be related to a reduction in host immune activation. HPgV replicates well in vivo (mean plasma viral loads typically >1×107 genome copies ml-1); however, the virus grows poorly in vitro and systems to study this virus are limited. Consequently, mechanisms of viral persistence and host immune modulation remain poorly characterized, and the primary permissive cell type(s) has not yet been identified. HPgV RNA is found in liver, spleen, bone marrow and PBMCs, including T- and B-lymphocytes, NK-cells, and monocytes, although the mechanism of cell-to-cell transmission is unclear. HPgV RNA is also present in serum microvesicles with properties of exosomes. These microvesicles are able to transmit viral RNA to PBMCs in vitro, resulting in productive infection. This review summarizes existing data on HPgV cellular tropism and the effect of HPgV on immune activation in various PBMCs, and discusses how this may influence viral persistence. We conclude that an increased understanding of HPgV replication and immune modulation may provide insights into persistent RNA viral infection of humans.
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Affiliation(s)
- Ernest T Chivero
- Medicine Service, Iowa City Veterans Affairs Medical Center, Interdisciplinary Program in Molecular and Cellular Biology, Departments of Internal Medicine and Microbiology, University of Iowa, Iowa City, IA 52242, USA
| | - Jack T Stapleton
- Medicine Service, Iowa City Veterans Affairs Medical Center, Interdisciplinary Program in Molecular and Cellular Biology, Departments of Internal Medicine and Microbiology, University of Iowa, Iowa City, IA 52242, USA
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T cell exhaustion during persistent viral infections. Virology 2015; 479-480:180-93. [PMID: 25620767 DOI: 10.1016/j.virol.2014.12.033] [Citation(s) in RCA: 219] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2014] [Revised: 12/17/2014] [Accepted: 12/19/2014] [Indexed: 02/08/2023]
Abstract
Although robust and highly effective anti-viral T cells contribute to the clearance of many acute infections, viral persistence is associated with the development of functionally inferior, exhausted, T cell responses. Exhaustion develops in a step-wise and progressive manner, ranges in severity, and can culminate in the deletion of the anti-viral T cells. This disarming of the response is consequential as it compromises viral control and potentially serves to dampen immune-mediated damage. Exhausted T cells are unable to elaborate typical anti-viral effector functions. They are characterized by the sustained upregulation of inhibitory receptors and display a gene expression profile that distinguishes them from prototypic effector and memory T cell populations. In this review we discuss the properties of exhausted T cells; the virological and immunological conditions that favor their development; the cellular and molecular signals that sustain the exhausted state; and strategies for preventing and reversing exhaustion to favor viral control.
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Licensed human natural killer cells aid dendritic cell maturation via TNFSF14/LIGHT. Proc Natl Acad Sci U S A 2014; 111:E5688-96. [PMID: 25512551 DOI: 10.1073/pnas.1411072112] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Interactions between natural killer (NK) cells and dendritic cells (DCs) aid DC maturation and promote T-cell responses. Here, we have analyzed the response of human NK cells to tumor cells, and we identify a pathway by which NK-DC interactions occur. Gene expression profiling of tumor-responsive NK cells identified the very rapid induction of TNF superfamily member 14 [TNFSF14; also known as homologous to lymphotoxins, exhibits inducible expression, and competes with HSV glycoprotein D for HVEM, a receptor expressed by T lymphocytes (LIGHT)], a cytokine implicated in the enhancement of antitumor responses. TNFSF14 protein expression was induced by three primary mechanisms of NK cell activation, namely, via the engagement of CD16, by the synergistic activity of multiple target cell-sensing NK-cell activation receptors, and by the cytokines IL-2 and IL-15. For antitumor responses, TNFSF14 was preferentially produced by the licensed NK-cell population, defined by the expression of inhibitory receptors specific for self-MHC class I molecules. In contrast, IL-2 and IL-15 treatment induced TNFSF14 production by both licensed and unlicensed NK cells, reflecting the ability of proinflammatory conditions to override the licensing mechanism. Importantly, both tumor- and cytokine-activated NK cells induced DC maturation in a TNFSF14-dependent manner. The coupling of TNFSF14 production to tumor-sensing NK-cell activation receptors links the tumor immune surveillance function of NK cells to DC maturation and adaptive immunity. Furthermore, regulation by NK cell licensing helps to safeguard against TNFSF14 production in response to healthy tissues.
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Albrecht C, Malzahn D, Brameier M, Hermes M, Ansari AA, Walter L. Progression to AIDS in SIV-Infected Rhesus Macaques is Associated with Distinct KIR and MHC class I Polymorphisms and NK Cell Dysfunction. Front Immunol 2014; 5:600. [PMID: 25506344 PMCID: PMC4246914 DOI: 10.3389/fimmu.2014.00600] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 11/07/2014] [Indexed: 12/21/2022] Open
Abstract
Killer cell immunoglobulin-like receptors (KIR) regulate the activity of natural killer (NK) cells and have been shown to be associated with susceptibility to a number of human infectious diseases. Here, we analyzed NK cell function and genetic associations in a cohort of 52 rhesus macaques experimentally infected with SIVmac and subsequently stratified into high viral load (HVL) and low viral load (LVL) plasma viral loads at set point. This stratification coincided with fast (HVL) and slow (LVL) disease progression indicated by the disease course and critical clinical parameters including CD4+ T cell counts. HVL animals revealed sustained proliferation of NK cells but distinct loss of peripheral blood NK cell numbers and lytic function. Genetic analyses revealed that KIR genes 3DL05, 3DS05, and 3DL10 as well as 3DSW08, 3DLW03, and 3DSW09 are correlated, most likely due to underlying haplotypes. SIV-infection outcome associated with presence of transcripts for two inhibitory KIR genes (KIR3DL02, KIR3DL10) and three activating KIR genes (KIR3DSW08, KIR3DS02, KIR3DS05). Presence of KIR3DL02 and KIR3DSW08 was associated with LVL outcome, whereas presence of KIR3DS02 was associated with HVL outcome. Furthermore, we identified epistasis between KIR and MHC class I alleles as the transcript presence of the correlated genes KIR3DL05, KIR3DS05, and KIR3DL10 increased HVL risk when Mamu-B*012 transcripts were also present or when Mamu-A1*001 transcripts were absent. These genetic associations were mirrored by changes in the numbers, the level of proliferation, and lytic capabilities of NK cells as well as overall survival time and gastro-intestinal tissue viral load.
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Affiliation(s)
- Christina Albrecht
- Primate Genetics Laboratory, German Primate Center, Leibniz-Institute for Primate Research , Göttingen , Germany
| | - Dörthe Malzahn
- Department of Genetic Epidemiology, University Medical Center, Georg-August-University , Göttingen , Germany
| | - Markus Brameier
- Primate Genetics Laboratory, German Primate Center, Leibniz-Institute for Primate Research , Göttingen , Germany
| | - Meike Hermes
- Primate Genetics Laboratory, German Primate Center, Leibniz-Institute for Primate Research , Göttingen , Germany
| | - Aftab A Ansari
- Department of Pathology and Laboratory Medicine, Emory University School of Medicine , Atlanta, GA , USA
| | - Lutz Walter
- Primate Genetics Laboratory, German Primate Center, Leibniz-Institute for Primate Research , Göttingen , Germany
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Paolini R, Bernardini G, Molfetta R, Santoni A. NK cells and interferons. Cytokine Growth Factor Rev 2014; 26:113-20. [PMID: 25443799 DOI: 10.1016/j.cytogfr.2014.11.003] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Accepted: 11/05/2014] [Indexed: 12/20/2022]
Abstract
The role of Natural Killer cells in host defense against infections as well as in tumour surveillance has been widely appreciated for a number of years. Upon recognition of "altered" cells, NK cells release the content of cytolytic granules, leading to the death of target cells. Moreover, NK cells are powerful producers of chemokines and cytokines, particularly Interferon-γ (IFN-γ), of which they are the earliest source upon a variety of infections. Despite being armed to fight against pathogens, NK cells become fully functional upon an initial phase of activation that requires the action of several cytokines, including type I IFNs. Type I IFNs are now recognized as key players in antiviral defense and immune regulation, and evidences from both mouse models of disease and in vitro studies support the existence of an alliance between type I IFNs and NK cells to ensure effective protection against viral infections. This review will focus on the role of type I IFNs in regulating NK cell functions to elicit antiviral response and on NK cell-produced IFN-γ beneficial and pathological effects.
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Affiliation(s)
- Rossella Paolini
- Department of Molecular Medicine, Istituto Pasteur Fondazione Cenci Bolognetti, "Sapienza" University of Rome, Italy
| | - Giovanni Bernardini
- Department of Molecular Medicine, Istituto Pasteur Fondazione Cenci Bolognetti, "Sapienza" University of Rome, Italy
| | - Rosa Molfetta
- Department of Molecular Medicine, Istituto Pasteur Fondazione Cenci Bolognetti, "Sapienza" University of Rome, Italy
| | - Angela Santoni
- Department of Molecular Medicine, Istituto Pasteur Fondazione Cenci Bolognetti, "Sapienza" University of Rome, Italy; IRCCS, Neuromed, Pozzilli, IS, Italy.
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Dustin LB, Cashman SB, Laidlaw SM. Immune control and failure in HCV infection--tipping the balance. J Leukoc Biol 2014; 96:535-48. [PMID: 25015956 DOI: 10.1189/jlb.4ri0214-126r] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Despite the development of potent antiviral drugs, HCV remains a global health problem; global eradication is a long way off. In this review, we discuss the immune response to HCV infection and particularly, the interplay between viral strategies that delay the onset of antiviral responses and host strategies that limit or even eradicate infected cells but also contribute to pathogenesis. Although HCV can disable some cellular virus-sensing machinery, IFN-stimulated antiviral genes are induced in the infected liver. Whereas epitope evolution contributes to escape from T cell-mediated immunity, chronic high antigen load may also blunt the T cell response by activating exhaustion or tolerance mechanisms. The evasive maneuvers of HCV limit sterilizing humoral immunity through rapid evolution of decoy epitopes, epitope masking, stimulation of interfering antibodies, lipid shielding, and cell-to-cell spread. Whereas the majority of HCV infections progress to chronic hepatitis with persistent viremia, at least 20% of patients spontaneously clear the infection. Most of these are protected from reinfection, suggesting that protective immunity to HCV exists and that a prophylactic vaccine may be an achievable goal. It is therefore important that we understand the correlates of protective immunity and mechanisms of viral persistence.
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Affiliation(s)
- Lynn B Dustin
- University of Oxford, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, Kennedy Institute of Rheumatology, Oxford, United Kingdom
| | - Siobhán B Cashman
- University of Oxford, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, Kennedy Institute of Rheumatology, Oxford, United Kingdom
| | - Stephen M Laidlaw
- University of Oxford, Nuffield Department of Orthopaedics, Rheumatology, and Musculoskeletal Sciences, Kennedy Institute of Rheumatology, Oxford, United Kingdom
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Larrubia JR, Moreno-Cubero E, Lokhande MU, García-Garzón S, Lázaro A, Miquel J, Perna C, Sanz-de-Villalobos E. Adaptive immune response during hepatitis C virus infection. World J Gastroenterol 2014; 20:3418-3430. [PMID: 24707125 PMCID: PMC3974509 DOI: 10.3748/wjg.v20.i13.3418] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 09/28/2013] [Accepted: 11/29/2013] [Indexed: 02/06/2023] Open
Abstract
Hepatitis C virus (HCV) infection affects about 170 million people worldwide and it is a major cause of liver cirrhosis and hepatocellular carcinoma. HCV is a hepatotropic non-cytopathic virus able to persist in a great percentage of infected hosts due to its ability to escape from the immune control. Liver damage and disease progression during HCV infection are driven by both viral and host factors. Specifically, adaptive immune response carries out an essential task in controlling non-cytopathic viruses because of its ability to recognize infected cells and to destroy them by cytopathic mechanisms and to eliminate the virus by non-cytolytic machinery. HCV is able to impair this response by several means such as developing escape mutations in neutralizing antibodies and in T cell receptor viral epitope recognition sites and inducing HCV-specific cytotoxic T cell anergy and deletion. To impair HCV-specific T cell reactivity, HCV affects effector T cell regulation by modulating T helper and Treg response and by impairing the balance between positive and negative co-stimulatory molecules and between pro- and anti-apoptotic proteins. In this review, the role of adaptive immune response in controlling HCV infection and the HCV mechanisms to evade this response are reviewed.
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