101
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Wong P, Iwasaki A. RAB15 empowers dendritic cells to drive antiviral immunity. Sci Immunol 2017; 2:2/13/eaan6448. [PMID: 28783705 DOI: 10.1126/sciimmunol.aan6448] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2017] [Accepted: 06/12/2017] [Indexed: 11/02/2022]
Abstract
CD1c+ and CD141+ dendritic cells cooperate to sustain antiviral T cell responses.
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Affiliation(s)
- Patrick Wong
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA
| | - Akiko Iwasaki
- Department of Immunobiology, Yale University School of Medicine, New Haven, CT 06520, USA. .,Howard Hughes Medical Institute, Chevy Chase, MD 20815, USA
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102
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Contribution of innate immune cells to pathogenesis of severe influenza virus infection. Clin Sci (Lond) 2017; 131:269-283. [PMID: 28108632 DOI: 10.1042/cs20160484] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 11/19/2016] [Accepted: 11/25/2016] [Indexed: 12/12/2022]
Abstract
Influenza A viruses (IAVs) cause respiratory illness of varying severity based on the virus strains, host predisposition and pre-existing immunity. Ultimately, outcome and recovery from infection rely on an effective immune response comprising both innate and adaptive components. The innate immune response provides the first line of defence and is crucial to the outcome of infection. Airway epithelial cells are the first cell type to encounter the virus in the lungs, providing antiviral and chemotactic molecules that shape the ensuing immune response by rapidly recruiting innate effector cells such as NK cells, monocytes and neutrophils. Each cell type has unique mechanisms to combat virus-infected cells and limit viral replication, however their actions may also lead to pathology. This review focuses how innate cells contribute to protection and pathology, and provides evidence for their involvement in immune pathology in IAV infections.
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103
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Scholz S, Baharom F, Rankin G, Maleki KT, Gupta S, Vangeti S, Pourazar J, Discacciati A, Höijer J, Bottai M, Björkström NK, Rasmuson J, Evander M, Blomberg A, Ljunggren HG, Klingström J, Ahlm C, Smed-Sörensen A. Human hantavirus infection elicits pronounced redistribution of mononuclear phagocytes in peripheral blood and airways. PLoS Pathog 2017. [PMID: 28640917 PMCID: PMC5498053 DOI: 10.1371/journal.ppat.1006462] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Hantaviruses infect humans via inhalation of virus-contaminated rodent excreta. Infection can cause severe disease with up to 40% mortality depending on the viral strain. The virus primarily targets the vascular endothelium without direct cytopathic effects. Instead, exaggerated immune responses may inadvertently contribute to disease development. Mononuclear phagocytes (MNPs), including monocytes and dendritic cells (DCs), orchestrate the adaptive immune responses. Since hantaviruses are transmitted via inhalation, studying immunological events in the airways is of importance to understand the processes leading to immunopathogenesis. Here, we studied 17 patients infected with Puumala virus that causes a mild form of hemorrhagic fever with renal syndrome (HFRS). Bronchial biopsies as well as longitudinal blood draws were obtained from the patients. During the acute stage of disease, a significant influx of MNPs expressing HLA-DR, CD11c or CD123 was detected in the patients’ bronchial tissue. In parallel, absolute numbers of MNPs were dramatically reduced in peripheral blood, coinciding with viremia. Expression of CCR7 on the remaining MNPs in blood suggested migration to peripheral and/or lymphoid tissues. Numbers of MNPs in blood subsequently normalized during the convalescent phase of the disease when viral RNA was no longer detectable in plasma. Finally, we exposed blood MNPs in vitro to Puumala virus, and demonstrated an induction of CCR7 expression on MNPs. In conclusion, the present study shows a marked redistribution of blood MNPs to the airways during acute hantavirus disease, a process that may underlie the local immune activation and contribute to immunopathogenesis in hantavirus-infected patients. Inhalation of hantavirus-infected rodent droppings can cause a wide range of disease ranging from mild symptoms to deaths in humans. Central to hantavirus disease is vascular leakage that can manifest in different organs, including the lungs. Although the virus can infect endothelial cells lining the blood vessels, it does not cause cell death. Instead, activation of the immune system in response to viral infection has been implicated in causing vascular leakage. In this study, we investigated how monocytes and dendritic cells (DCs) are involved in hantavirus disease, given their capacity to activate other immune cells. We obtained unique clinical material from 17 Puumala virus-infected patients including mucosal biopsies from the airways as well as multiple blood draws over the course of disease. In the airways of these patients, we observed an infiltration of monocytes and DCs. In parallel, there was a dramatic depletion in peripheral blood—more than ten-fold—of monocytes and DCs that was sustained throughout the first two weeks of disease. Taken together, this study provides novel insights into immune mediated processes underlying human hantavirus pathogenesis.
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Affiliation(s)
- Saskia Scholz
- Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Faezzah Baharom
- Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Gregory Rankin
- Department of Public Health and Clinical Medicine, Division of Medicine, Umeå University, Umeå, Sweden
| | - Kimia T. Maleki
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Shawon Gupta
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Sindhu Vangeti
- Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Jamshid Pourazar
- Department of Public Health and Clinical Medicine, Division of Medicine, Umeå University, Umeå, Sweden
| | - Andrea Discacciati
- Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Jonas Höijer
- Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Matteo Bottai
- Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Niklas K. Björkström
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Johan Rasmuson
- Department of Clinical Microbiology, Infectious Diseases, Umeå University, Umeå, Sweden
| | - Magnus Evander
- Department of Clinical Microbiology, Virology, Umeå University, Umeå, Sweden
| | - Anders Blomberg
- Department of Public Health and Clinical Medicine, Division of Medicine, Umeå University, Umeå, Sweden
| | - Hans-Gustaf Ljunggren
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Jonas Klingström
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Clas Ahlm
- Department of Clinical Microbiology, Infectious Diseases, Umeå University, Umeå, Sweden
| | - Anna Smed-Sörensen
- Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
- * E-mail:
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104
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Conejero L, Khouili SC, Martínez-Cano S, Izquierdo HM, Brandi P, Sancho D. Lung CD103+ dendritic cells restrain allergic airway inflammation through IL-12 production. JCI Insight 2017; 2:90420. [PMID: 28515363 DOI: 10.1172/jci.insight.90420] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 04/07/2017] [Indexed: 12/16/2022] Open
Abstract
DCs are necessary and sufficient for induction of allergic airway inflammation. CD11b+ DCs direct the underlying Th2 immunity, but debate surrounds the function of CD103+ DCs in lung immunity and asthma after an allergic challenge. We challenged Batf3-/- mice, which lacked lung CD103+ DCs, with the relevant allergen house dust mite (HDM) as a model to ascertain their role in asthma. We show that acute and chronic HDM exposure leads to defective Th1 immunity in Batf3-deficient mice. In addition, chronic HDM challenge in Batf3-/- mice results in increased Th2 and Th17 immune responses and exacerbated airway inflammation. Mechanistically, Batf3 absence does not affect induction of Treg or IL-10 production by lung CD4+ T cells following acute HDM challenge. Batf3-dependent CD103+ migratory DCs are the main source of IL-12p40 in the mediastinal lymph node DC compartment in the steady state. Moreover, CD103+ DCs selectively increase their IL-12p40 production upon HDM administration. In vivo IL-12 treatment reverts exacerbated allergic airway inflammation upon chronic HDM challenge in Batf3-/- mice, restraining Th2 and Th17 responses without triggering Th1 immunity. These results suggest a protective role for lung CD103+ DCs to HDM allergic airway inflammation through the production of IL-12.
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105
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Baharom F, Rankin G, Blomberg A, Smed-Sörensen A. Human Lung Mononuclear Phagocytes in Health and Disease. Front Immunol 2017; 8:499. [PMID: 28507549 PMCID: PMC5410584 DOI: 10.3389/fimmu.2017.00499] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Accepted: 04/11/2017] [Indexed: 12/17/2022] Open
Abstract
The lungs are vulnerable to attack by respiratory insults such as toxins, allergens, and pathogens, given their continuous exposure to the air we breathe. Our immune system has evolved to provide protection against an array of potential threats without causing collateral damage to the lung tissue. In order to swiftly detect invading pathogens, monocytes, macrophages, and dendritic cells (DCs)-together termed mononuclear phagocytes (MNPs)-line the respiratory tract with the key task of surveying the lung microenvironment in order to discriminate between harmless and harmful antigens and initiate immune responses when necessary. Each cell type excels at specific tasks: monocytes produce large amounts of cytokines, macrophages are highly phagocytic, whereas DCs excel at activating naïve T cells. Extensive studies in murine models have established a division of labor between the different populations of MNPs at steady state and during infection or inflammation. However, a translation of important findings in mice is only beginning to be explored in humans, given the challenge of working with rare cells in inaccessible human tissues. Important progress has been made in recent years on the phenotype and function of human lung MNPs. In addition to a substantial population of alveolar macrophages, three subsets of DCs have been identified in the human airways at steady state. More recently, monocyte-derived cells have also been described in healthy human lungs. Depending on the source of samples, such as lung tissue resections or bronchoalveolar lavage, the specific subsets of MNPs recovered may differ. This review provides an update on existing studies investigating human respiratory MNP populations during health and disease. Often, inflammatory MNPs are found to accumulate in the lungs of patients with pulmonary conditions. In respiratory infections or inflammatory diseases, this may contribute to disease severity, but in cancer patients this may improve clinical outcomes. By expanding on this knowledge, specific lung MNPs may be targeted or modulated in order to attain favorable responses that can improve preventive or treatment strategies against respiratory infections, lung cancer, or lung inflammatory diseases.
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Affiliation(s)
- Faezzah Baharom
- Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital Solna, Stockholm, Sweden
| | - Gregory Rankin
- Department of Public Health and Clinical Medicine, Division of Medicine, Umeå University, Umeå, Sweden
| | - Anders Blomberg
- Department of Public Health and Clinical Medicine, Division of Medicine, Umeå University, Umeå, Sweden
| | - Anna Smed-Sörensen
- Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet, Karolinska University Hospital Solna, Stockholm, Sweden
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106
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Takamura S. Persistence in Temporary Lung Niches: A Survival Strategy of Lung-Resident Memory CD8 + T Cells. Viral Immunol 2017; 30:438-450. [PMID: 28418771 PMCID: PMC5512299 DOI: 10.1089/vim.2017.0016] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Respiratory virus infections, such as those mediated by influenza virus, parainfluenza virus, respiratory syncytial virus (RSV), severe acute respiratory syndrome coronavirus (SARS-CoV), rhinovirus, and adenovirus, are responsible for substantial morbidity and mortality, especially in children and older adults. Furthermore, the potential emergence of highly pathogenic strains of influenza virus poses a significant public health threat. Thus, the development of vaccines capable of eliciting long-lasting protective immunity to those pathogens is a major public health priority. CD8+ Tissue-resident memory T (TRM) cells are a newly defined population that resides permanently in the nonlymphoid tissues including the lung. These cells are capable of providing local protection immediately after infection, thereby promoting rapid host recovery. Recent studies have offered new insights into the anatomical niches that harbor lung CD8+ TRM cells, and also identified the requirement and limitations of TRM maintenance. However, it remains controversial whether lung CD8+ TRM cells are continuously replenished by new cells from the circulation or permanently lodged in this site. A better understanding of how lung CD8+ TRM cells are generated and maintained and the tissue-specific factors that drive local TRM formation is required for optimal vaccine development. This review focuses on recent advance in our understanding of CD8+ TRM cell establishment and maintenance in the lung, and describes how those processes are uniquely regulated in this tissue.
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Affiliation(s)
- Shiki Takamura
- Department of Immunology, Kindai University , Faculty of Medicine, Osaka, Japan
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107
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Blom RAM, Amacker M, van Dijk RM, Moser C, Stumbles PA, Blank F, von Garnier C. Pulmonary Delivery of Virosome-Bound Antigen Enhances Antigen-Specific CD4 + T Cell Proliferation Compared to Liposome-Bound or Soluble Antigen. Front Immunol 2017; 8:359. [PMID: 28439267 PMCID: PMC5383731 DOI: 10.3389/fimmu.2017.00359] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 03/14/2017] [Indexed: 12/18/2022] Open
Abstract
Pulmonary administration of biomimetic nanoparticles loaded with antigen may represent an effective strategy to directly modulate adaptive immune responses in the respiratory tract. Depending on the design, virosomes may not only serve as biomimetic antigen carriers but are also endowed with intrinsic immune-stimulatory properties. We designed fluorescently labeled influenza-derived virosomes and liposome controls coupled to the model antigen ovalbumin to investigate uptake, phenotype changes, and antigen processing by antigen-presenting cells exposed to such particles in different respiratory tract compartments. Both virosomes and liposomes were captured by pulmonary macrophages and dendritic cells alike and induced activation in particle-bearing cells by upregulation of costimulatory markers such as CD40, CD80, CD86, PD-L1, PD-L2, and ICOS-L. Though antigen processing and accumulation of both coupled and soluble antigen was similar between virosomes and liposomes, only ovalbumin-coupled virosomes generated a strong antigen-specific CD4+ T cell proliferation. Pulmonary administrated antigen-coupled virosomes therefore effectively induced adaptive immune responses and may be utilized in novel preventive or therapeutic approaches in the respiratory tract.
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Affiliation(s)
- Rebecca A M Blom
- Department of Pulmonary Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department of Clinical Research, University of Bern, Bern, Switzerland.,Graduate School for Cellular and Biomedical Sciences, University of Bern, Bern, Switzerland
| | | | | | - Christian Moser
- Swiss Federal Institute of Intellectual Property, Bern, Switzerland
| | - Philip A Stumbles
- School of Veterinary and Life Sciences, Medical and Molecular Sciences, Murdoch University, Perth, WA, Australia.,Telethon Kids Institute, Perth, WA, Australia
| | - Fabian Blank
- Department of Pulmonary Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department of Clinical Research, University of Bern, Bern, Switzerland
| | - Christophe von Garnier
- Department of Pulmonary Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.,Department of Clinical Research, University of Bern, Bern, Switzerland
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108
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Tundup S, Kandasamy M, Perez JT, Mena N, Steel J, Nagy T, Albrecht RA, Manicassamy B. Endothelial cell tropism is a determinant of H5N1 pathogenesis in mammalian species. PLoS Pathog 2017; 13:e1006270. [PMID: 28282445 PMCID: PMC5362246 DOI: 10.1371/journal.ppat.1006270] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 03/22/2017] [Accepted: 03/02/2017] [Indexed: 12/19/2022] Open
Abstract
The cellular and molecular mechanisms underpinning the unusually high virulence of highly pathogenic avian influenza H5N1 viruses in mammalian species remains unknown. Here, we investigated if the cell tropism of H5N1 virus is a determinant of enhanced virulence in mammalian species. We engineered H5N1 viruses with restricted cell tropism through the exploitation of cell type-specific microRNA expression by incorporating microRNA target sites into the viral genome. Restriction of H5N1 replication in endothelial cells via miR-126 ameliorated disease symptoms, prevented systemic viral spread and limited mortality, despite showing similar levels of peak viral replication in the lungs as compared to control virus-infected mice. Similarly, restriction of H5N1 replication in endothelial cells resulted in ameliorated disease symptoms and decreased viral spread in ferrets. Our studies demonstrate that H5N1 infection of endothelial cells results in excessive production of cytokines and reduces endothelial barrier integrity in the lungs, which culminates in vascular leakage and viral pneumonia. Importantly, our studies suggest a need for a combinational therapy that targets viral components, suppresses host immune responses, and improves endothelial barrier integrity for the treatment of highly pathogenic H5N1 virus infections. In healthy individuals, the symptoms of seasonal influenza virus infection are mild and the infection is cleared within 4–7 days. However, infection with highly pathogenic avian influenza virus (H5N1) can be severe and often results in fatal pneumonia even in healthy adults. While it is known that both viral and host factors play a role in enhanced disease progression, the molecular mechanisms for the high virulence of H5N1 virus are not completely understood. In this study, we engineered avian influenza H5N1 viruses incapable of replicating in endothelial cells and evaluated disease symptoms in mice and ferrets. Our studies show that H5N1 infection of endothelial cells causes severe disease and death of infected animals in part due to the damage of endothelial cells lining the blood vessels, which results in leakage of fluid into the lungs (pneumonia).
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Affiliation(s)
- Smanla Tundup
- Department of Microbiology, University of Chicago, Chicago, IL, United States of America
- Howard Taylor Ricketts Laboratory, University of Chicago, Argonne, IL, United States of America
| | - Matheswaran Kandasamy
- Department of Microbiology, University of Chicago, Chicago, IL, United States of America
- Howard Taylor Ricketts Laboratory, University of Chicago, Argonne, IL, United States of America
| | - Jasmine T. Perez
- Department of Microbiology, University of Chicago, Chicago, IL, United States of America
| | - Nacho Mena
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, United States of America
| | - John Steel
- Department of Microbiology, Emory University, Atlanta, GA, United States of America
| | - Tamas Nagy
- Comparative Pathology Laboratory, University of Georgia, Athens, GA, United States of America
| | - Randy A. Albrecht
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, United States of America
| | - Balaji Manicassamy
- Department of Microbiology, University of Chicago, Chicago, IL, United States of America
- Howard Taylor Ricketts Laboratory, University of Chicago, Argonne, IL, United States of America
- * E-mail:
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109
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Lüdtke A, Ruibal P, Wozniak DM, Pallasch E, Wurr S, Bockholt S, Gómez-Medina S, Qiu X, Kobinger GP, Rodríguez E, Günther S, Krasemann S, Idoyaga J, Oestereich L, Muñoz-Fontela C. Ebola virus infection kinetics in chimeric mice reveal a key role of T cells as barriers for virus dissemination. Sci Rep 2017; 7:43776. [PMID: 28256637 PMCID: PMC5335601 DOI: 10.1038/srep43776] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 01/30/2017] [Indexed: 12/24/2022] Open
Abstract
Ebola virus (EBOV) causes severe systemic disease in humans and non-human primates characterized by high levels of viremia and virus titers in peripheral organs. The natural portals of virus entry are the mucosal surfaces and the skin where macrophages and dendritic cells (DCs) are primary EBOV targets. Due to the migratory properties of DCs, EBOV infection of these cells has been proposed as a necessary step for virus dissemination via draining lymph nodes and blood. Here we utilize chimeric mice with competent hematopoietic-driven immunity, to show that EBOV primarily infects CD11b+ DCs in non-lymphoid and lymphoid tissues, but spares the main cross-presenting CD103+ DC subset. Furthermore, depletion of CD8 and CD4 T cells resulted in loss of early control of virus replication, viremia and fatal Ebola virus disease (EVD). Thus, our findings point out at T cell function as a key determinant of EVD progress and outcome.
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Affiliation(s)
- Anja Lüdtke
- Heinrich Pette Institute, Leibniz Institute For Experimental Virology, Martinistrasse 52 20251 Hamburg, Germany.,Department of Virology, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany.,German Center for Infection Research (DZIF), Partner site Hamburg, Germany
| | - Paula Ruibal
- Heinrich Pette Institute, Leibniz Institute For Experimental Virology, Martinistrasse 52 20251 Hamburg, Germany.,Department of Virology, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany.,German Center for Infection Research (DZIF), Partner site Hamburg, Germany
| | - David M Wozniak
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany.,German Center for Infection Research (DZIF), Partner site Hamburg, Germany
| | - Elisa Pallasch
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany.,German Center for Infection Research (DZIF), Partner site Hamburg, Germany
| | - Stephanie Wurr
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany.,German Center for Infection Research (DZIF), Partner site Hamburg, Germany
| | - Sabrina Bockholt
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany.,German Center for Infection Research (DZIF), Partner site Hamburg, Germany
| | - Sergio Gómez-Medina
- Heinrich Pette Institute, Leibniz Institute For Experimental Virology, Martinistrasse 52 20251 Hamburg, Germany
| | - Xiangguo Qiu
- Special Pathogens Program, National Microbiology Laboratory, Public Health Agency of Canada, Winnipeg, MB R3E 3R2, Canada
| | - Gary P Kobinger
- Department of Microbiology, Immunology &Infectious Diseases, Université Laval, Quebec City, Canada
| | - Estefanía Rodríguez
- Heinrich Pette Institute, Leibniz Institute For Experimental Virology, Martinistrasse 52 20251 Hamburg, Germany
| | - Stephan Günther
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany.,German Center for Infection Research (DZIF), Partner site Hamburg, Germany
| | - Susanne Krasemann
- Institute for Neuropathology, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany
| | - Juliana Idoyaga
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Lisa Oestereich
- Department of Virology, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany.,German Center for Infection Research (DZIF), Partner site Hamburg, Germany
| | - César Muñoz-Fontela
- Heinrich Pette Institute, Leibniz Institute For Experimental Virology, Martinistrasse 52 20251 Hamburg, Germany.,Department of Virology, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany.,German Center for Infection Research (DZIF), Partner site Hamburg, Germany
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110
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Leifer CA. Dendritic cells in host response to biologic scaffolds. Semin Immunol 2017; 29:41-48. [PMID: 28214177 DOI: 10.1016/j.smim.2017.01.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Revised: 01/23/2017] [Accepted: 01/31/2017] [Indexed: 02/03/2023]
Abstract
Tissue regeneration and repair require a highly complex and orchestrated series of events that require inflammation, but can be compromised when inflammation is excessive or becomes chronic. Macrophages are one of the first cells to contact and respond to implanted materials, and mediate the inflammatory response. The series of events following macrophage association with biomaterials has been well-studied. Dendritic cells (DCs) also directly interact with biomaterials, are critical for specific immune responses, and can be activated in response to interactions with biomaterials. Yet, much less is known about the responses by DCs. This review discusses what we know about DC response to biomaterials, the underlying mechanisms involved, and how DCs can be influenced by the macrophage response to biomaterials. Lastly, I will discuss how biomaterials can be manipulated to enhance or suppress DC function to promote a specific desirable immune response - a major goal for implantable biologically active therapeutics.
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Affiliation(s)
- Cynthia A Leifer
- Department of Microbiology and Immunology College of Veterinary Medicine, C5-153 Cornell University, Ithaca, NY, USA.
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111
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Shekhar S, Peng Y, Wang S, Yang X. CD103+ lung dendritic cells (LDCs) induce stronger Th1/Th17 immunity to a bacterial lung infection than CD11b hi LDCs. Cell Mol Immunol 2017; 15:377-387. [PMID: 28194020 DOI: 10.1038/cmi.2016.68] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 12/04/2016] [Accepted: 12/04/2016] [Indexed: 12/24/2022] Open
Abstract
Recent studies suggest differential roles for CD103+ and CD11bhi lung dendritic cells (LDCs) in host defense against viral and bacterial infections. In this study, we examined the contribution of these LDC subsets in protective immunity to chlamydial lung infection using a Chlamydia muridarum mouse infection model. We found that CD103+ LDCs showed higher expression of costimulatory molecules (CD40, CD80 and CD86) and increased production of cytokines (IL-12p70, IL-10, IL-23 and IL-6) compared with CD11bhi LDCs, but the expression of programmed death-ligand 1 (PD-L1) was similar between the two subsets. More importantly, we found, in adoptive transfer experiments, that the mice receiving CD103+ LDCs from Chlamydia-infected mice exhibited better protection than the recipients of CD11bhi LDCs, which was associated with more robust Th1/Th17 cytokine responses. In addition, in vitro experiments showed that CD103+ LDCs induced stronger IFN-γ and IL-17 responses, when cocutured with chlamydial antigen-primed CD4+ T cells, than CD11bhi LDCs. Furthermore, the blockade of PD1 in the culture of CD4+ T cells with either CD103+ or CD11bhi LDCs enhanced production of IFN-γ and IL-17. In conclusion, our data provide direct evidence that CD103+ LDCs are more potent in promoting Th1/Th17 immunity to chlamydial lung infection than CD11bhi LDCs.
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Affiliation(s)
- Sudhanshu Shekhar
- Department of Medical Microbiology, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada.,Department of Immunology, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada
| | - Ying Peng
- Department of Medical Microbiology, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada.,Department of Immunology, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada
| | - Shuhe Wang
- Department of Medical Microbiology, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada.,Department of Immunology, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada
| | - Xi Yang
- Department of Medical Microbiology, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada. .,Department of Immunology, Faculty of Medicine, University of Manitoba, Winnipeg, MB, Canada.
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112
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Macrophage Transcriptional Profile Identifies Lipid Catabolic Pathways That Can Be Therapeutically Targeted after Spinal Cord Injury. J Neurosci 2017; 37:2362-2376. [PMID: 28130359 DOI: 10.1523/jneurosci.2751-16.2017] [Citation(s) in RCA: 69] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Revised: 01/13/2017] [Accepted: 01/22/2017] [Indexed: 11/21/2022] Open
Abstract
Although infiltrating macrophages influence many pathological processes after spinal cord injury (SCI), the intrinsic molecular mechanisms that regulate their function are poorly understood. A major hurdle has been dissecting macrophage-specific functions from those in other cell types as well as understanding how their functions change over time. Therefore, we used the RiboTag method to obtain macrophage-specific mRNA directly from the injured spinal cord in mice and performed RNA sequencing to investigate their transcriptional profile. Our data show that at 7 d after SCI, macrophages are best described as foam cells, with lipid catabolism representing the main biological process, and canonical nuclear receptor pathways as their potential mediators. Genetic deletion of a lipoprotein receptor, CD36, reduces macrophage lipid content and improves lesion size and locomotor recovery. Therefore, we report the first macrophage-specific transcriptional profile after SCI and highlight the lipid catabolic pathway as an important macrophage function that can be therapeutically targeted after SCI.SIGNIFICANCE STATEMENT The intrinsic molecular mechanisms that regulate macrophage function after spinal cord injury (SCI) are poorly understood. We obtained macrophage-specific mRNA directly from the injured spinal cord and performed RNA sequencing to investigate their transcriptional profile. Our data show that at 7 d after SCI, macrophages are best described as foam cells, with lipid catabolism representing the main biological process and canonical nuclear receptor pathways as their potential mediators. Genetic deletion of a lipoprotein receptor, CD36, reduces macrophage lipid content and improves lesion size and locomotor recovery. Therefore, we report the first macrophage-specific transcriptional profile after SCI and highlight the lipid catabolic pathway as an important macrophage function that can be therapeutically targeted after SCI.
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Pakalniškytė D, Schraml BU. Tissue-Specific Diversity and Functions of Conventional Dendritic Cells. Adv Immunol 2017; 134:89-135. [DOI: 10.1016/bs.ai.2017.01.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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114
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Marshall NB, Vong AM, Devarajan P, Brauner MD, Kuang Y, Nayar R, Schutten EA, Castonguay CH, Berg LJ, Nutt SL, Swain SL. NKG2C/E Marks the Unique Cytotoxic CD4 T Cell Subset, ThCTL, Generated by Influenza Infection. THE JOURNAL OF IMMUNOLOGY 2016; 198:1142-1155. [PMID: 28031335 DOI: 10.4049/jimmunol.1601297] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Accepted: 12/05/2016] [Indexed: 01/22/2023]
Abstract
CD4 T cells can differentiate into multiple effector subsets, including ThCTL that mediate MHC class II-restricted cytotoxicity. Although CD4 T cell-mediated cytotoxicity has been reported in multiple viral infections, their characteristics and the factors regulating their generation are unclear, in part due to a lack of a signature marker. We show in this article that, in mice, NKG2C/E identifies the ThCTL that develop in the lung during influenza A virus infection. ThCTL express the NKG2X/CD94 complex, in particular the NKG2C/E isoforms. NKG2C/E+ ThCTL are part of the lung CD4 effector population, and they mediate influenza A virus-specific cytotoxic activity. The phenotype of NKG2C/E+ ThCTL indicates they are highly activated effectors expressing high levels of binding to P-selectin, T-bet, and Blimp-1, and that more of them secrete IFN-γ and readily degranulate than non-ThCTL. ThCTL also express more cytotoxicity-associated genes including perforin and granzymes, and fewer genes associated with recirculation and memory. They are found only at the site of infection and not in other peripheral sites. These data suggest ThCTL are marked by the expression of NKG2C/E and represent a unique CD4 effector population specialized for cytotoxicity.
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Affiliation(s)
- Nikki B Marshall
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Allen M Vong
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | | | - Matthew D Brauner
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Yi Kuang
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Ribhu Nayar
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Elizabeth A Schutten
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Catherine H Castonguay
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Leslie J Berg
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605
| | - Stephen L Nutt
- Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria 3052, Australia; and.,Department of Medical Biology, The University of Melbourne, Parkville, Victoria 3010, Australia
| | - Susan L Swain
- Department of Pathology, University of Massachusetts Medical School, Worcester, MA 01605;
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Abstract
ABSTRACT
The aim of this review is to provide a coherent framework for understanding dendritic cells (DCs). It has seven sections. The introduction provides an overview of the immune system and essential concepts, particularly for the nonspecialist reader. Next, the “History” section outlines the early evolution of ideas about DCs and highlights some sources of confusion that still exist today. The “Lineages” section then focuses on five different populations of DCs: two subsets of “classical” DCs, plasmacytoid DCs, monocyte-derived DCs, and Langerhans cells. It highlights some cellular and molecular specializations of each, and also notes other DC subsets that have been proposed. The following “Tissues” section discusses the distribution and behavior of different DC subsets within nonlymphoid and secondary lymphoid tissues that are connected by DC migration pathways between them. In the “Tolerance” section, the role of DCs in central and peripheral tolerance is considered, including their ability to drive the differentiation of different populations of regulatory T cells. In contrast, the “Immunity” section considers the roles of DCs in sensing of infection and tissue damage, the initiation of primary responses, the T-cell effector phase, and the induction of immunological memory. The concluding section provides some speculative ideas about the evolution of DCs. It also revisits earlier concepts of generation of diversity and clonal selection in terms of DCs driving the evolution of T-cell responses. Throughout, this review highlights certain areas of uncertainty and suggests some avenues for future investigation.
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116
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Nirschl CJ, Anandasabapathy N. Duality at the gate: Skin dendritic cells as mediators of vaccine immunity and tolerance. Hum Vaccin Immunother 2016; 12:104-16. [PMID: 26836327 DOI: 10.1080/21645515.2015.1066050] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Since Edward Jenner's discovery that intentional exposure to cowpox could provide lifelong protection from smallpox, vaccinations have been a major focus of medical research. However, while the protective benefits of many vaccines have been successfully translated into the clinic, the cellular and molecular mechanisms that differentiate effective vaccines from sub-optimal ones are not well understood. Dendritic cells (DCs) are the gatekeepers of the immune system, and are ultimately responsible for the generation of adaptive immunity and lifelong protective memory through interactions with T cells. In addition to lymph node and spleen resident DCs, a number of tissue resident DC populations have been identified at barrier tissues, such as the skin, which migrate to the local lymph node (migDC). These populations have unique characteristics, and play a key role in the function of cutaneous vaccinations by shuttling antigen from the vaccination site to the draining lymph node, rapidly capturing freely draining antigens in the lymph node, and providing key stimuli to T cells. However, while migDCs are responsible for the generation of immunity following exposure to certain pathogens and vaccines, recent work has identified a tolerogenic role for migDCs in the steady state as well as during protein immunization. Here, we examine the roles and functions of skin DC populations in the generation of protective immunity, as well as their role as regulators of the immune system.
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Affiliation(s)
- Christopher J Nirschl
- a Department of Dermatology ; Harvard Skin Disease Research Center; Brigham and Women's Hospital ; Boston , MA USA
| | - Niroshana Anandasabapathy
- a Department of Dermatology ; Harvard Skin Disease Research Center; Brigham and Women's Hospital ; Boston , MA USA
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Cruz JLG, Pérez-Girón JV, Lüdtke A, Gómez-Medina S, Ruibal P, Idoyaga J, Muñoz-Fontela C. Monocyte-derived dendritic cells enhance protection against secondary influenza challenge by controlling the switch in CD8 + T-cell immunodominance. Eur J Immunol 2016; 47:345-352. [PMID: 27859043 PMCID: PMC5324604 DOI: 10.1002/eji.201646523] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 10/10/2016] [Accepted: 11/16/2016] [Indexed: 12/24/2022]
Abstract
Influenza virus infection triggers an increase in the number of monocyte‐derived dendritic cells (moDCs) in the respiratory tract, but the role of these cells during antiviral immunity is still unclear. Here we show that during influenza infection, moDCs dominate the late activation of CD8+ T cells and trigger the switch in immunodominance of the CD8+ T‐cell response from acidic polymerase specificity to nucleoprotein specificity. Abrogation of monocyte recruitment or depletion of moDCs strongly compromised host resistance to secondary influenza challenge. These findings underscore a novel function of moDCs in the antiviral response to influenza virus, and have important implications for vaccine design.
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Affiliation(s)
- Jazmina L G Cruz
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - José V Pérez-Girón
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Anja Lüdtke
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany.,Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany.,German Center for Infection Research (DZIF), Partner Site Hamburg, Hamburg, Germany
| | - Sergio Gómez-Medina
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany
| | - Paula Ruibal
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany.,Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany.,German Center for Infection Research (DZIF), Partner Site Hamburg, Hamburg, Germany
| | - Juliana Idoyaga
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA, USA
| | - César Muñoz-Fontela
- Heinrich Pette Institute, Leibniz Institute for Experimental Virology, Hamburg, Germany.,Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany.,German Center for Infection Research (DZIF), Partner Site Hamburg, Hamburg, Germany
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Worbs T, Hammerschmidt SI, Förster R. Dendritic cell migration in health and disease. Nat Rev Immunol 2016; 17:30-48. [PMID: 27890914 DOI: 10.1038/nri.2016.116] [Citation(s) in RCA: 511] [Impact Index Per Article: 63.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Dendritic cells (DCs) are potent and versatile antigen-presenting cells, and their ability to migrate is key for the initiation of protective pro-inflammatory as well as tolerogenic immune responses. Recent comprehensive studies have highlighted the importance of DC migration in the maintenance of immune surveillance and tissue homeostasis, and also in the pathogenesis of a range of diseases. In this Review, we summarize the anatomical, cellular and molecular factors that regulate the migration of different DC subsets in health and disease. In particular, we focus on new insights concerning the role of migratory DCs in the pathogenesis of diseases of the skin, intestine, lung, and brain, as well as in autoimmunity and atherosclerosis.
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Affiliation(s)
- Tim Worbs
- Institute of Immunology, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
| | - Swantje I Hammerschmidt
- Institute of Immunology, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
| | - Reinhold Förster
- Institute of Immunology, Hannover Medical School, Carl-Neuberg-Strasse 1, 30625 Hannover, Germany
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Kim JH, Reber AJ, Kumar A, Ramos P, Sica G, Music N, Guo Z, Mishina M, Stevens J, York IA, Jacob J, Sambhara S. Non-neutralizing antibodies induced by seasonal influenza vaccine prevent, not exacerbate A(H1N1)pdm09 disease. Sci Rep 2016; 6:37341. [PMID: 27849030 PMCID: PMC5110975 DOI: 10.1038/srep37341] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 10/25/2016] [Indexed: 11/12/2022] Open
Abstract
The association of seasonal trivalent influenza vaccine (TIV) with increased infection by 2009 pandemic H1N1 (A(H1N1)pdm09) virus, initially observed in Canada, has elicited numerous investigations on the possibility of vaccine-associated enhanced disease, but the potential mechanisms remain largely unresolved. Here, we investigated if prior immunization with TIV enhanced disease upon A(H1N1)pdm09 infection in mice. We found that A(H1N1)pdm09 infection in TIV-immunized mice did not enhance the disease, as measured by morbidity and mortality. Instead, TIV-immunized mice cleared A(H1N1)pdm09 virus and recovered at an accelerated rate compared to control mice. Prior TIV immunization was associated with potent inflammatory mediators and virus-specific CD8 T cell activation, but efficient immune regulation, partially mediated by IL-10R-signaling, prevented enhanced disease. Furthermore, in contrast to suggested pathological roles, pre-existing non-neutralizing antibodies (NNAbs) were not associated with enhanced virus replication, but rather with promoted antigen presentation through FcR-bearing cells that led to potent activation of virus-specific CD8 T cells. These findings provide new insights into interactions between pre-existing immunity and pandemic viruses.
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Affiliation(s)
- Jin Hyang Kim
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30329, USA
| | - Adrian J Reber
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30329, USA
| | - Amrita Kumar
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30329, USA
| | - Patricia Ramos
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30329, USA
| | - Gabriel Sica
- Department of Pathology and Laboratory Medicine, School of Medicine, Emory University, 1364 Clifton Rd, N.E. Atlanta, GA 30322, USA
| | - Nedzad Music
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30329, USA
| | - Zhu Guo
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30329, USA
| | - Margarita Mishina
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30329, USA.,Batelle Memorial Institute, Atlanta, GA 30322, USA
| | - James Stevens
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30329, USA
| | - Ian A York
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30329, USA
| | - Joshy Jacob
- Department of Microbiology and Immunology, Emory Vaccine Center, Yerkes National Primate Center, Emory University, 954 Gatewood Rd, Atlanta, GA, USA
| | - Suryaprakash Sambhara
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30329, USA
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Fear VS, Lai SP, Zosky GR, Perks KL, Gorman S, Blank F, von Garnier C, Stumbles PA, Strickland DH. A pathogenic role for the integrin CD103 in experimental allergic airways disease. Physiol Rep 2016; 4:4/21/e13021. [PMID: 27905296 PMCID: PMC5112499 DOI: 10.14814/phy2.13021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2016] [Revised: 10/06/2016] [Accepted: 10/09/2016] [Indexed: 11/24/2022] Open
Abstract
The integrin CD103 is the αE chain of integrin αEβ7 that is important in the maintenance of intraepithelial lymphocytes and recruitment of T cells and dendritic cells (DC) to mucosal surfaces. The role of CD103 in intestinal immune homeostasis has been well described, however, its role in allergic airway inflammation is less well understood. In this study, we used an ovalbumin (OVA)-induced, CD103-knockout (KO) BALB/c mouse model of experimental allergic airways disease (EAAD) to investigate the role of CD103 in disease expression, CD4+ T-cell activation and DC activation and function in airways and lymph nodes. We found reduced airways hyper-responsiveness and eosinophil recruitment to airways after aerosol challenge of CD103 KO compared to wild-type (WT) mice, although CD103 KO mice showed enhanced serum OVA-specific IgE levels. Following aerosol challenge, total numbers of effector and regulatory CD4+ T-cell subsets were significantly increased in the airways of WT but not CD103 KO mice, as well as a lack of DC recruitment into the airways in the absence of CD103. While total airway DC numbers, and their in vivo allergen capture activity, were essentially normal in steady-state CD103 KO mice, migration of allergen-laden airway DC to draining lymph nodes was disrupted in the absence of CD103 at 24 h after aerosol challenge. These data support a role for CD103 in the pathogenesis of EAAD in BALB/c mice through local control of CD4+ T cell and DC subset recruitment to, and migration from, the airway mucosa during induction of allergic inflammation.
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Affiliation(s)
| | | | | | | | | | - Fabian Blank
- Department of Clinical Research, University of Bern, Bern, Switzerland
| | | | - Philip A Stumbles
- Telethon Kids Institute, Perth, Australia.,School of Veterinary and Life Sciences, Murdoch University, Perth, Australia.,School of Paediatrics and Child Health, University of Western Australia, Perth, Australia
| | - Deborah H Strickland
- Telethon Kids Institute, Perth, Australia .,School of Paediatrics and Child Health, University of Western Australia, Perth, Australia
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Exogenous Activation of Invariant Natural Killer T Cells by α-Galactosylceramide Reduces Pneumococcal Outgrowth and Dissemination Postinfluenza. mBio 2016; 7:mBio.01440-16. [PMID: 27803187 PMCID: PMC5090038 DOI: 10.1128/mbio.01440-16] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Influenza A virus infection can predispose to potentially devastating secondary bacterial infections. Invariant natural killer T (iNKT) cells are unconventional, lipid-reactive T lymphocytes that exert potent immunostimulatory functions. Using a mouse model of postinfluenza invasive secondary pneumococcal infection, we sought to establish whether α-galactosylceramide (α-GalCer [a potent iNKT cell agonist that is currently in clinical development]) could limit bacterial superinfection. Our results highlighted the presence of a critical time window during which α-GalCer treatment can trigger iNKT cell activation and influence resistance to postinfluenza secondary pneumococcal infection. Intranasal treatment with α-GalCer during the acute phase (on day 7) of influenza virus H3N2 and H1N1 infection failed to activate (gamma interferon [IFN-γ] and interleukin-17A [IL-17A]) iNKT cells; this effect was associated with a strongly reduced number of conventional CD103+ dendritic cells in the respiratory tract. In contrast, α-GalCer treatment during the early phase (on day 4) or during the resolution phase (day 14) of influenza was associated with lower pneumococcal outgrowth and dissemination. Less intense viral-bacterial pneumonia and a lower morbidity rate were observed in superinfected mice treated with both α-GalCer (day 14) and the corticosteroid dexamethasone. Our results open the way to alternative (nonantiviral/nonantibiotic) iNKT-cell-based approaches for limiting postinfluenza secondary bacterial infections. IMPORTANCE Despite the application of vaccination programs and antiviral drugs, influenza A virus (IAV) infection is responsible for widespread morbidity and mortality (500,000 deaths/year). Influenza infections can also result in sporadic pandemics that can be devastating: the 1918 pandemic led to the death of 50 million people. Severe bacterial infections are commonly associated with influenza and are significant contributors to the excess morbidity and mortality of influenza. Today's treatments of secondary bacterial (pneumococcal) infections are still not effective enough, and antibiotic resistance is a major issue. Hence, there is an urgent need for novel therapies. In the present study, we set out to evaluate the efficacy of α-galactosylceramide (α-GalCer)-a potent agonist of invariant NKT cells that is currently in clinical development-in a mouse model of postinfluenza, highly invasive pneumococcal pneumonia. Our data indicate that treatment with α-GalCer reduces susceptibility to superinfections and, when combined with the corticosteroid dexamethasone, reduces viral-bacterial pneumonia.
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Influenza and Memory T Cells: How to Awake the Force. Vaccines (Basel) 2016; 4:vaccines4040033. [PMID: 27754364 PMCID: PMC5192353 DOI: 10.3390/vaccines4040033] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 09/27/2016] [Indexed: 12/24/2022] Open
Abstract
Annual influenza vaccination is an effective way to prevent human influenza. Current vaccines are mainly focused on eliciting a strain-matched humoral immune response, requiring yearly updates, and do not provide protection for all vaccinated individuals. The past few years, the importance of cellular immunity, and especially memory T cells, in long-lived protection against influenza virus has become clear. To overcome the shortcomings of current influenza vaccines, eliciting both humoral and cellular immunity is imperative. Today, several new vaccines such as infection-permissive and recombinant T cell inducing vaccines, are being developed and show promising results. These vaccines will allow us to stay several steps ahead of the constantly evolving influenza virus.
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Salmon H, Idoyaga J, Rahman A, Leboeuf M, Remark R, Jordan S, Casanova-Acebes M, Khudoynazarova M, Agudo J, Tung N, Chakarov S, Rivera C, Hogstad B, Bosenberg M, Hashimoto D, Gnjatic S, Bhardwaj N, Palucka AK, Brown BD, Brody J, Ginhoux F, Merad M. Expansion and Activation of CD103(+) Dendritic Cell Progenitors at the Tumor Site Enhances Tumor Responses to Therapeutic PD-L1 and BRAF Inhibition. Immunity 2016; 44:924-38. [PMID: 27096321 DOI: 10.1016/j.immuni.2016.03.012] [Citation(s) in RCA: 812] [Impact Index Per Article: 101.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 11/19/2015] [Accepted: 12/21/2015] [Indexed: 12/26/2022]
Abstract
Large numbers of melanoma lesions develop resistance to targeted inhibition of mutant BRAF or fail to respond to checkpoint blockade. We explored whether modulation of intratumoral antigen-presenting cells (APCs) could increase responses to these therapies. Using mouse melanoma models, we found that CD103(+) dendritic cells (DCs) were the only APCs transporting intact antigens to the lymph nodes and priming tumor-specific CD8(+) T cells. CD103(+) DCs were required to promote anti-tumoral effects upon blockade of the checkpoint ligand PD-L1; however, PD-L1 inhibition only led to partial responses. Systemic administration of the growth factor FLT3L followed by intratumoral poly I:C injections expanded and activated CD103(+) DC progenitors in the tumor, enhancing responses to BRAF and PD-L1 blockade and protecting mice from tumor rechallenge. Thus, the paucity of activated CD103(+) DCs in tumors limits checkpoint-blockade efficacy and combined FLT3L and poly I:C therapy can enhance tumor responses to checkpoint and BRAF blockade.
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Affiliation(s)
- Hélène Salmon
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Juliana Idoyaga
- Department of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Adeeb Rahman
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Marylène Leboeuf
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Romain Remark
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Stefan Jordan
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Maria Casanova-Acebes
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Makhzuna Khudoynazarova
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Judith Agudo
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Navpreet Tung
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Svetoslav Chakarov
- Singapore Immunology Network, Agency for Science, Technology and Research, Biopolis 138648, Singapore
| | - Christina Rivera
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Brandon Hogstad
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | | | - Daigo Hashimoto
- Department of Hematology, Hokkaido University Graduate School of Medicine, Sapporo 060-8638, Japan
| | - Sacha Gnjatic
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Nina Bhardwaj
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | | | - Brian D Brown
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Joshua Brody
- Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Florent Ginhoux
- Singapore Immunology Network, Agency for Science, Technology and Research, Biopolis 138648, Singapore
| | - Miriam Merad
- Department of Oncological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
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DiPiazza A, Richards K, Batarse F, Lockard L, Zeng H, García-Sastre A, Albrecht RA, Sant AJ. Flow Cytometric and Cytokine ELISpot Approaches To Characterize the Cell-Mediated Immune Response in Ferrets following Influenza Virus Infection. J Virol 2016; 90:7991-8004. [PMID: 27356897 PMCID: PMC4988159 DOI: 10.1128/jvi.01001-16] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Accepted: 06/18/2016] [Indexed: 12/11/2022] Open
Abstract
UNLABELLED Influenza virus infections represent a significant socioeconomic and public health burden worldwide. Although ferrets are considered by many to be ideal for modeling human responses to influenza infection and vaccination, efforts to understand the cellular immune response have been severely hampered by a paucity of standardized procedures and reagents. In this study, we developed flow cytometric and T cell enzyme-linked immunosorbent spot (ELISpot) approaches to characterize the leukocyte composition and antigen-specific T cell response within key lymphoid tissues following influenza virus infection in ferrets. Through a newly designed and implemented set of serological reagents, we used multiparameter flow cytometry to directly quantify the frequency of CD4(+) and CD8(+) T cells, Ig(+) B cells, CD11b(+) myeloid-derived cells, and major histocompatibility complex (MHC) class II-positive antigen-presenting cells (APCs) both prior to and after intranasal infection with A/California/04/09 (H1N1). We found that the leukocyte composition was altered at 10 days postinfection, with notable gains in the frequency of T cells and myeloid cells within the draining lymph node. Furthermore, these studies revealed that the antigen specificity of influenza virus-reactive CD4 and CD8 T cells was very broad, with recognition of the viral HA, NA, M1, NS1, and NP proteins, and that total reactivity to influenza virus postinfection represented approximately 0.1% of the circulating peripheral blood mononuclear cells (PBMC). Finally, we observed distinct patterns of reactivity between individual animals, suggesting heterogeneity at the MHC locus in ferrets within commercial populations, a finding of considerable interest in efforts to move the ferret model forward for influenza vaccine and challenge studies. IMPORTANCE Ferrets are an ideal animal model to study transmission, diseases, and vaccine efficacies of respiratory viruses because of their close anatomical and physiological resemblances to humans. However, a lack of reagents has limited our understanding of the cell-mediated immune response following infection and vaccination. In this study, we used cross-reactive and ferret-specific antibodies to study the leukocyte composition and antigen-specific CD4 and CD8 T cell responses following influenza A/California/04/09 (H1N1) virus infection. These studies revealed strikingly distinct patterns of reactivity between CD4 and CD8 T cells, which were overlaid with differences in protein-specific responses between individual animals. Our results provide a first, in-depth look at the T cell repertoire in response to influenza infection and suggest that there is considerable heterogeneity at the MHC locus, which is akin to that in humans and an area of intense research interest.
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Affiliation(s)
- Anthony DiPiazza
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester Medical Center, Rochester, New York, USA
| | - Katherine Richards
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester Medical Center, Rochester, New York, USA
| | - Frances Batarse
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester Medical Center, Rochester, New York, USA
| | - Laura Lockard
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester Medical Center, Rochester, New York, USA
| | - Hui Zeng
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Adolfo García-Sastre
- Department of Microbiology, Icahn School of Medicine at Mt. Sinai, New York, New York, USA Global Health and Emerging Pathogens Institute at Icahn School of Medicine, New York, New York, USA Department of Medicine, Icahn School of Medicine at Mt. Sinai, New York, New York, USA
| | - Randy A Albrecht
- Department of Microbiology, Icahn School of Medicine at Mt. Sinai, New York, New York, USA Global Health and Emerging Pathogens Institute at Icahn School of Medicine, New York, New York, USA
| | - Andrea J Sant
- Department of Microbiology and Immunology, David H. Smith Center for Vaccine Biology and Immunology, University of Rochester Medical Center, Rochester, New York, USA
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125
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LeMessurier KS, Lin Y, McCullers JA, Samarasinghe AE. Antimicrobial peptides alter early immune response to influenza A virus infection in C57BL/6 mice. Antiviral Res 2016; 133:208-17. [PMID: 27531368 DOI: 10.1016/j.antiviral.2016.08.013] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Accepted: 08/12/2016] [Indexed: 02/07/2023]
Abstract
Influenza is a disease of the respiratory system caused by single stranded RNA viruses with varying genotypes. Immunopathogenesis to influenza viruses differs based on virus strain, dose, and mouse strain used in laboratory models. Although effective mucosal immune defenses are important in early host defense against influenza, information on the kinetics of these immune defense mechanisms during the course of influenza infection is limited. We investigated changes to antimicrobial peptides and primary innate immune cells at early time points after infection and compared these variables between two prominent H1N1 influenza A virus (IAV) strains, A/CA/04/2009 and A/PR/08/1934 in C57BL/6 mice. Alveolar and parenchymal macrophage ratios were altered after IAV infection and pro-inflammatory cytokine production in macrophages was induced after IAV infection. Genes encoding antimicrobial peptides, β-defensin (Defb4), bactericidal-permeability increasing protein (Bpifa1), and cathelicidin antimicrobial peptide (Camp), were differentially regulated after IAV infection and the kinetics of Defb4 expression differed in response to each virus strain. Beta-defensin reduced infectivity of A/CA/04/2009 virus but not A/PR/08/1934. Beta defensins also changed the innate immune cell profile wherein mice pre-treated with β-defensin had increased alveolar macrophages and CD103(+) dendritic cells, and reduced CD11b(+) dendritic cells and neutrophils. In addition to highlighting that immune responses may vary based on influenza virus strain used, our data suggest an important role for antimicrobial peptides in host defense against influenza virus.
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Affiliation(s)
- Kim S LeMessurier
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN 38103, USA
| | - Yanyan Lin
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN 38103, USA
| | - Jonathan A McCullers
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN 38103, USA; Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Amali E Samarasinghe
- Department of Pediatrics, University of Tennessee Health Science Center, Memphis, TN 38103, USA; Department of Infectious Diseases, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
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126
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RIG-I Signaling Is Critical for Efficient Polyfunctional T Cell Responses during Influenza Virus Infection. PLoS Pathog 2016; 12:e1005754. [PMID: 27438481 PMCID: PMC4954706 DOI: 10.1371/journal.ppat.1005754] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 06/17/2016] [Indexed: 12/20/2022] Open
Abstract
Retinoic acid inducible gene-I (RIG-I) is an innate RNA sensor that recognizes the influenza A virus (IAV) RNA genome and activates antiviral host responses. Here, we demonstrate that RIG-I signaling plays a crucial role in restricting IAV tropism and regulating host immune responses. Mice deficient in the RIG-I-MAVS pathway show defects in migratory dendritic cell (DC) activation, viral antigen presentation, and priming of CD8+ and CD4+ T cell responses during IAV infection. These defects result in decreased frequency of polyfunctional effector T cells and lowered protection against heterologous IAV challenge. In addition, our data show that RIG-I activation is essential for protecting epithelial cells and hematopoietic cells from IAV infection. These diverse effects of RIG-I signaling are likely imparted by the actions of type I interferon (IFN), as addition of exogenous type I IFN is sufficient to overcome the defects in antigen presentation by RIG-I deficient BMDC. Moreover, the in vivo T cell defects in RIG-I deficient mice can be overcome by the activation of MDA5 –MAVS via poly I:C treatment. Taken together, these findings demonstrate that RIG-I signaling through MAVS is critical for determining the quality of polyfunctional T cell responses against IAV and for providing protection against subsequent infection from heterologous or novel pandemic IAV strains. Retinoic acid inducible gene-I (RIG-I) is a cytosolic RNA sensor that detects influenza virus infection and has been previously shown to be critical for controlling influenza virus replication in cell culture systems. Here, we performed studies in mice with defects in the RIG-I pathway to understand its role in initiating immune responses against influenza virus. Our studies show that RIG-I signaling protects host lung tissue from influenza virus infection and aids in the timely clearance of influenza virus from the lungs. Consistent with this observation, RIG-I deficient mice show defects in type I IFN production and subsequent activation of the adaptive immune response (T cell responses) against influenza viruses. This defect in T cell activation is overcome by exogenous addition of type I IFN to antigen presenting cells (APC) in vitro or by poly I:C treatment of RIG-I deficient mice, demonstrating that RIG-I signaling is critical for type I IFN production and proper activation of adaptive responses against influenza virus infection. Thus, our study suggests that RIG-I signaling is essential for reducing influenza virus disease burden in a timely manner and for providing protection against emerging novel IAV strains.
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127
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Schmid ET, Pang IK, Carrera Silva EA, Bosurgi L, Miner JJ, Diamond MS, Iwasaki A, Rothlin CV. AXL receptor tyrosine kinase is required for T cell priming and antiviral immunity. eLife 2016; 5. [PMID: 27350258 PMCID: PMC4924996 DOI: 10.7554/elife.12414] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 06/01/2016] [Indexed: 12/21/2022] Open
Abstract
The receptor tyrosine kinase (RTK) AXL is induced in response to type I interferons (IFNs) and limits their production through a negative feedback loop. Enhanced production of type I IFNs in Axl-/-dendritic cells (DCs) in vitro have led to speculation that inhibition of AXL would promote antiviral responses. Notwithstanding, type I IFNs also exert potent immunosuppressive functions. Here we demonstrate that ablation of AXL enhances the susceptibility to infection by influenza A virus and West Nile virus. The increased type I IFN response in Axl-/- mice was associated with diminished DC maturation, reduced production of IL-1β, and defective antiviral T cell immunity. Blockade of type I IFN receptor or administration of IL-1β to Axl-/- mice restored the antiviral adaptive response and control of infection. Our results demonstrate that AXL is essential for limiting the immunosuppressive effects of type I IFNs and enabling the induction of protective antiviral adaptive immunity. DOI:http://dx.doi.org/10.7554/eLife.12414.001 The immune system must be ever vigilant to ward off infections. Immune cells called T-cells can identify and eliminate microbes, but if they are too aggressive, they can damage the body. To prevent this, the body has systems that control immune responses. For example, another type of immune cell called a dendritic cell produces proteins known as type 1 interferons, which help to fight viral infections while limiting other immune responses. An enzyme called AXL blocks the production of type 1 interferons. Many scientists believe that this activity reduces the ability of individual cells in the body to defend themselves against attacking viruses. In fact, experiments with cells grown in the laboratory have shown that some viruses activate the AXL enzyme to help them infect. Similar studies have also shown that inhibiting AXL and related enzymes can make cells more able to fight off certain types of viral infection. These and other studies suggested that some drugs that block AXL might be useful treatments for viral infections, however it was not clear if this was the case for all viruses. Now, Schmid et al. show that the loss of AXL actually makes mice more prone to infections by the influenza virus and West Nile Virus. In the experiments, mice genetically engineered to lack AXL were more likely than normal mice to become ill after exposure to one of the viruses. Furthermore, fewer T cells matured to the stage where they could attack the virus in these mice. Next, Schmid et al. show that blocking the production of type 1 interferons in the mice that lack AXL restores their ability to fight off these viral infections. This is because type 1 interferons limit the production of a protein that helps the dendritic cells to mature. Therefore, Schmid et al.’s findings show that AXL is vital for mice to fight off viral infections because it helps to balance the antiviral and immune suppressing activities of type 1 interferons. The findings also suggest that using drugs that block AXL to treat infections with certain viruses, including influenza and West Nile Virus, might do more harm than good. DOI:http://dx.doi.org/10.7554/eLife.12414.002
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Affiliation(s)
- Edward T Schmid
- Department of Immunobiology, School of Medicine, Yale University, New Haven, United States
| | - Iris K Pang
- Department of Immunobiology, School of Medicine, Yale University, New Haven, United States
| | | | - Lidia Bosurgi
- Department of Immunobiology, School of Medicine, Yale University, New Haven, United States
| | - Jonathan J Miner
- Department of Medicine, Washington University School of Medicine, St Louis, United States
| | - Michael S Diamond
- Department of Molecular Microbiology, Washington University School of Medicine, St Louis, United States.,Department of Pathology and Immunology, Washington University School of Medicine, St Louis, United States.,The Center for Human Immunology and Immunotherapy Programs, Washington University School of Medicine, St Louis, United States
| | - Akiko Iwasaki
- Department of Immunobiology, School of Medicine, Yale University, New Haven, United States.,Howard Hughes Medical Institute, Yale University, New Haven, United States
| | - Carla V Rothlin
- Department of Immunobiology, School of Medicine, Yale University, New Haven, United States
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128
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Breen M, Nogales A, Baker SF, Martínez-Sobrido L. Replication-Competent Influenza A Viruses Expressing Reporter Genes. Viruses 2016; 8:v8070179. [PMID: 27347991 PMCID: PMC4974514 DOI: 10.3390/v8070179] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2016] [Revised: 06/16/2016] [Accepted: 06/19/2016] [Indexed: 12/12/2022] Open
Abstract
Influenza A viruses (IAV) cause annual seasonal human respiratory disease epidemics. In addition, IAV have been implicated in occasional pandemics with inordinate health and economic consequences. Studying IAV, in vitro or in vivo, requires the use of laborious secondary methodologies to identify virus-infected cells. To circumvent this requirement, replication-competent IAV expressing an easily traceable reporter protein can be used. Here we discuss the development and applications of recombinant replication-competent IAV harboring diverse fluorescent or bioluminescent reporter genes in different locations of the viral genome. These viruses have been employed for in vitro and in vivo studies, such as the screening of neutralizing antibodies or antiviral compounds, the identification of host factors involved in viral replication, cell tropism, the development of vaccines, or the assessment of viral infection dynamics. In summary, reporter-expressing, replicating-competent IAV represent a powerful tool for the study of IAV both in vitro and in vivo.
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Affiliation(s)
- Michael Breen
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Rochester, NY 14642, USA.
| | - Aitor Nogales
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Rochester, NY 14642, USA.
| | - Steven F Baker
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Rochester, NY 14642, USA.
| | - Luis Martínez-Sobrido
- Department of Microbiology and Immunology, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Rochester, NY 14642, USA.
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129
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Bedoui S, Heath WR, Mueller SN. CD
4
+
T‐cell help amplifies innate signals for primary
CD
8
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T‐cell immunity. Immunol Rev 2016; 272:52-64. [DOI: 10.1111/imr.12426] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Sammy Bedoui
- Department of Microbiology and Immunology The University of Melbourne Peter Doherty Institute for Infection and Immunity Parkville Vic. Australia
| | - William R. Heath
- Department of Microbiology and Immunology The University of Melbourne Peter Doherty Institute for Infection and Immunity Parkville Vic. Australia
- The Australian Research Council Centre of Excellence in Advanced Molecular Imaging The University of Melbourne Parkville Vic. Australia
| | - Scott N. Mueller
- Department of Microbiology and Immunology The University of Melbourne Peter Doherty Institute for Infection and Immunity Parkville Vic. Australia
- The Australian Research Council Centre of Excellence in Advanced Molecular Imaging The University of Melbourne Parkville Vic. Australia
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130
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Bajaña S, Turner S, Paul J, Ainsua-Enrich E, Kovats S. IRF4 and IRF8 Act in CD11c+ Cells To Regulate Terminal Differentiation of Lung Tissue Dendritic Cells. THE JOURNAL OF IMMUNOLOGY 2016; 196:1666-77. [PMID: 26746189 DOI: 10.4049/jimmunol.1501870] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 12/10/2015] [Indexed: 12/24/2022]
Abstract
Dendritic cells (DCs) initiate immune responses in barrier tissues including lung and skin. Conventional DC (cDC) subsets, CD11b(-) (cDC1s) or CD11b(+) (cDC2s), arise via distinct networks of transcription factors involving IFN regulatory factor 4 (IRF4) and IRF8, and are specialized for unique functional responses. Using mice in which a conditional Irf4 or Irf8 allele is deleted in CD11c(+) cells, we determined whether IRF4 or IRF8 deficiency beginning in CD11c(+) cDC precursors (pre-cDCs) changed the homeostasis of mature DCs or pre-DCs in the lung, dermis, and spleen. CD11c-cre-Irf4(-/-) mice selectively lacked a lung-resident CD11c(hi)CD11b(+)SIRPα(+)CD24(+) DC subset, but not other lung CD11b(+) DCs or alveolar macrophages. Numbers of CD11b(+)CD4(+) splenic DCs, but not CD11b(+) dermal DCs, were reduced, indicating cDC2s in the lung and dermis develop via different pathways. Irf4 deficiency did not alter numbers of cDC1s. CD11c-cre-Irf8(-/-) mice lacked lung-resident CD103(+) DCs and splenic CD8α(+) DCs, yet harbored increased IRF4-dependent DCs. This correlated with a reduced number of Irf8(-/-) pre-cDCs, which contained elevated IRF4, suggesting that Irf8 deficiency diverts pre-cDC fate. Analyses of Irf4 and Irf8 haploinsufficient mice showed that, although one Irf4 allele was sufficient for lung cDC2 development, two functional Irf8 alleles were required for differentiation of lung cDC1s. Thus, IRF8 and IRF4 act in pre-cDCs to direct the terminal differentiation of cDC1 and cDC2 subsets in the lung and spleen. These data suggest that variation in IRF4 or IRF8 levels resulting from genetic polymorphisms or environmental cues will govern tissue DC numbers and, therefore, regulate the magnitude of DC functional responses.
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Affiliation(s)
- Sandra Bajaña
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104
| | - Sean Turner
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104
| | - Jinny Paul
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104
| | - Erola Ainsua-Enrich
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104
| | - Susan Kovats
- Arthritis and Clinical Immunology Program, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104
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131
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Abstract
The T cell response is an integral and essential part of the host immune response to acute virus infection. Each viral pathogen has unique, frequently nuanced, aspects to its replication, which affects the host response and as a consequence the capacity of the virus to produce disease. There are, however, common features to the T cell response to viruses, which produce acute limited infection. This is true whether virus replication is restricted to a single site, for example, the respiratory tract (RT), CNS etc., or replication is in multiple sites throughout the body. In describing below the acute T cell response to virus infection, we employ acute virus infection of the RT as a convenient model to explore this process of virus infection and the host response. We divide the process into three phases: the induction (initiation) of the response, the expression of antiviral effector activity resulting in virus elimination, and the resolution of inflammation with restoration of tissue homeostasis.
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132
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Abstract
Dendritic cells are specialized antigen-presenting cells that initiate and orient immune responses. Numerous studies in mice and humans have shown that dendritic cells are heterogeneous and comprise several subsets that can be distinguished by their surface phenotype, ontogeny, and molecular signature. This review gives an overview of mouse and human dendritic cell subsets and their defining features and summarizes the current knowledge of dendritic cell subsets' functional specialization in terms of antigen presentation.
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Affiliation(s)
- Elodie Segura
- Institut Curie, 26 rue d'Ulm, 75248, Paris Cedex 05, France. .,INSERM U932, 26 rue d'Ulm, 75248, Paris Cedex 05, France.
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133
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Ruane D, Chorny A, Lee H, Faith J, Pandey G, Shan M, Simchoni N, Rahman A, Garg A, Weinstein EG, Oropallo M, Gaylord M, Ungaro R, Cunningham-Rundles C, Alexandropoulos K, Mucida D, Merad M, Cerutti A, Mehandru S. Microbiota regulate the ability of lung dendritic cells to induce IgA class-switch recombination and generate protective gastrointestinal immune responses. J Exp Med 2015; 213:53-73. [PMID: 26712806 PMCID: PMC4710201 DOI: 10.1084/jem.20150567] [Citation(s) in RCA: 90] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2015] [Accepted: 12/01/2015] [Indexed: 12/12/2022] Open
Abstract
Ruane et al. demonstrate a role for the microbiota in modulating protective immunity to intranasal vaccination via the ability of lung dendritic cells to induce B cell IgA class switching. Protective immunoglobulin A (IgA) responses to oral antigens are usually orchestrated by gut dendritic cells (DCs). Here, we show that lung CD103+ and CD24+CD11b+ DCs induced IgA class-switch recombination (CSR) by activating B cells through T cell–dependent or –independent pathways. Compared with lung DCs (LDC), lung CD64+ macrophages had decreased expression of B cell activation genes and induced significantly less IgA production. Microbial stimuli, acting through Toll-like receptors, induced transforming growth factor-β (TGF-β) production by LDCs and exerted a profound influence on LDC-mediated IgA CSR. After intranasal immunization with inactive cholera toxin (CT), LDCs stimulated retinoic acid–dependent up-regulation of α4β7 and CCR9 gut-homing receptors on local IgA-expressing B cells. Migration of these B cells to the gut resulted in IgA-mediated protection against an oral challenge with active CT. However, in germ-free mice, the levels of LDC-induced, CT–specific IgA in the gut are significantly reduced. Herein, we demonstrate an unexpected role of the microbiota in modulating the protective efficacy of intranasal vaccination through their effect on the IgA class-switching function of LDCs.
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Affiliation(s)
- Darren Ruane
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029 The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Alejo Chorny
- The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Haekyung Lee
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029 The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Jeremiah Faith
- The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Gaurav Pandey
- Department of Genetics and Genomic Sciences and Icahn Institute for Genomics and Multiscale Biology, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Meimei Shan
- The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Noa Simchoni
- The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Adeeb Rahman
- The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Aakash Garg
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Erica G Weinstein
- The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Michael Oropallo
- The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Michelle Gaylord
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029 The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Ryan Ungaro
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | | | | | - Daniel Mucida
- Laboratory of Mucosal Immunology, The Rockefeller University, New York, NY 10065
| | - Miriam Merad
- The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Andrea Cerutti
- The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
| | - Saurabh Mehandru
- Division of Gastroenterology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029 The Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029
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134
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Kim JH, Liepkalns J, Reber AJ, Lu X, Music N, Jacob J, Sambhara S. Prior infection with influenza virus but not vaccination leaves a long-term immunological imprint that intensifies the protective efficacy of antigenically drifted vaccine strains. Vaccine 2015; 34:495-502. [PMID: 26706277 DOI: 10.1016/j.vaccine.2015.11.077] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/17/2015] [Accepted: 11/30/2015] [Indexed: 11/26/2022]
Abstract
The role of pre-existing immunity for influenza vaccine responses is of great importance for public health, and thus has been studied in various contexts, yet the impact of differential priming on vaccine responses in the midst of antigenic drift remains to be elucidated. To address this with antigenically related viruses, mice were first primed by either infection or immunization with A/Puerto Rico/8/34 (PR8) virus, then immunized with whole-inactivated A/Fort Monmouth/1/47 (FM1) virus. The ensuing vaccine responses and the protective efficacy of FM1 were superior in PR8 infection-primed mice compared to PR8 immunization-primed or unprimed mice. Increased FM1-specific Ab responses of PR8 infection-primed mice also broadened cross-reactivity against contemporary as well as antigenically more drifted strains. Further, prior infection heightened the protective efficacy of antigenically distant strains, such as A/Brisbane/59/2006 infection followed by immunization with split pandemic H1N1 vaccine (A/California/07/2009). Therefore, influenza infection is a significant priming event that intensifies future vaccine responses against drift strains.
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Affiliation(s)
- Jin Hyang Kim
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30329, USA
| | - Justine Liepkalns
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30329, USA
| | - Adrian J Reber
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30329, USA
| | - Xiuhua Lu
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30329, USA
| | - Nedzad Music
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30329, USA
| | - Joshy Jacob
- Department of Microbiology and Immunology, Emory Vaccine Center, Emory University, 954 Gatewood Rd, Atlanta, GA 30329, USA.
| | - Suryaprakash Sambhara
- Influenza Division, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, 1600 Clifton Road, Atlanta, GA 30329, USA.
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135
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Infusini G, Smith JM, Yuan H, Pizzolla A, Ng WC, Londrigan SL, Haque A, Reading PC, Villadangos JA, Wakim LM. Respiratory DC Use IFITM3 to Avoid Direct Viral Infection and Safeguard Virus-Specific CD8+ T Cell Priming. PLoS One 2015; 10:e0143539. [PMID: 26600246 PMCID: PMC4657952 DOI: 10.1371/journal.pone.0143539] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2015] [Accepted: 11/05/2015] [Indexed: 11/19/2022] Open
Abstract
Respiratory dendritic cells (DC) play a pivotal role in the initiation of adaptive immune responses to influenza virus. To do this, respiratory DCs must ferry viral antigen from the lung to the draining lymph node without becoming infected and perishing en route. We show that respiratory DCs up-regulate the expression of the antiviral molecule, interferon-induced transmembrane protein 3 (IFITM3) in response to influenza virus infection, in a manner dependent on type I interferon signaling and the transcription factors IRF7 and IRF3. Failure of respiratory DCs to up-regulate IFITM3 following influenza virus infection resulted in impaired trafficking to the draining LN and consequently in impaired priming of an influenza-specific CD8+ T cell response. The impaired trafficking of IFITM3-deficient DC correlated with an increased susceptibility of these DC to influenza virus infection. This work shows that the expression of IFITM3 protects respiratory DCs from influenza virus infection, permitting migration from lung to LN and optimal priming of a virus specific T-cell response.
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Affiliation(s)
- Giuseppe Infusini
- Division of Systems Biology and Personalised Medicine, The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC 3052, Australia
| | - Jeffrey M. Smith
- Department of Microbiology and Immunology, The University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
| | - He Yuan
- Department of Microbiology and Immunology, The University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
| | - Angela Pizzolla
- Department of Microbiology and Immunology, The University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
| | - Wy Ching Ng
- Department of Microbiology and Immunology, The University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
| | - Sarah L. Londrigan
- Department of Microbiology and Immunology, The University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
| | - Ashraful Haque
- Malaria Immunology Lab, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Patrick C. Reading
- Department of Microbiology and Immunology, The University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
| | - Jose A. Villadangos
- Department of Microbiology and Immunology, The University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
- Department of Biochemistry and Molecular Biology, Bio21 Molecular Science and Biotechnology Institute, The University of Melbourne, Parkville, VIC 3010, Australia
- * E-mail: (LMW); (JAV)
| | - Linda M. Wakim
- Department of Microbiology and Immunology, The University of Melbourne, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria 3000, Australia
- * E-mail: (LMW); (JAV)
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136
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Cao Q, Lu J, Li Q, Wang C, Wang XM, Lee VWS, Wang C, Nguyen H, Zheng G, Zhao Y, Alexander SI, Wang Y, Harris DCH. CD103+ Dendritic Cells Elicit CD8+ T Cell Responses to Accelerate Kidney Injury in Adriamycin Nephropathy. J Am Soc Nephrol 2015; 27:1344-60. [PMID: 26376858 DOI: 10.1681/asn.2015030229] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2015] [Accepted: 07/31/2015] [Indexed: 12/22/2022] Open
Abstract
CD103(+) dendritic cells (DCs) in nonlymphoid organs exhibit two main functions: maintaining tolerance by induction of regulatory T cells and protecting against tissue infection through cross-presentation of foreign antigens to CD8(+) T cells. However, the role of CD103(+) DCs in kidney disease is unknown. In this study, we show that CD103(+) DCs are one of four subpopulations of renal mononuclear phagocytes in normal kidneys. CD103(+) DCs expressed DC-specific surface markers, transcription factors, and growth factor receptors and were found in the kidney cortex but not in the medulla. The number of kidney CD103(+) DCs was significantly higher in mice with adriamycin nephropathy (AN) than in normal mice, and depletion of CD103(+) DCs attenuated kidney injury in AN mice. In vitro, kidney CD103(+) DCs preferentially primed CD8(+) T cells and did not directly induce tubular epithelial cell apoptosis. Adoptive transfer of CD8(+) T cells significantly exacerbated kidney injury in AN SCID mice, whereas depletion of CD103(+) DCs in these mice impaired activation and proliferation of transfused CD8(+) T cells and prevented the exacerbation of kidney injury associated with this transfusion. In conclusion, kidney CD103(+) DCs display a pathogenic role in murine CKD via activation of CD8(+) T cells.
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Affiliation(s)
- Qi Cao
- Centre for Transplant and Renal Research and
| | - Junyu Lu
- Emergency Department, People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, China; and
| | - Qing Li
- Centre for Transplant and Renal Research and
| | | | - Xin Maggie Wang
- Flow Cytometry Facility, Westmead Millennium Institute, University of Sydney, Sydney, New South Wales, Australia
| | | | | | - Hanh Nguyen
- Centre for Transplant and Renal Research and
| | | | - Ye Zhao
- Centre for Transplant and Renal Research and
| | - Stephen I Alexander
- Centre for Kidney Research, Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Yiping Wang
- Centre for Transplant and Renal Research and
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137
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Molecular Determinants of Virulence and Stability of a Reporter-Expressing H5N1 Influenza A Virus. J Virol 2015; 89:11337-46. [PMID: 26339046 DOI: 10.1128/jvi.01886-15] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 08/24/2015] [Indexed: 11/20/2022] Open
Abstract
UNLABELLED We previously reported that an H5N1 virus carrying the Venus reporter gene, which was inserted into the NS gene segment from the A/Puerto Rico/8/1934(H1N1) virus (Venus-H5N1 virus), became more lethal to mice, and the reporter gene was stably maintained after mouse adaptation compared with the wild-type Venus-H5N1 (WT-Venus-H5N1) virus. However, the basis for this difference in virulence and Venus stability was unclear. Here, we investigated the molecular determinants behind this virulence and reporter stability by comparing WT-Venus-H5N1 virus with a mouse-adapted Venus-H5N1 (MA-Venus-H5N1) virus. To determine the genetic basis for these differences, we used reverse genetics to generate a series of reassortants of these two viruses. We found that reassortants with PB2 from MA-Venus-H5N1 (MA-PB2), MA-PA, or MA-NS expressed Venus more stably than did WT-Venus-H5N1 virus. We also found that a single mutation in PB2 (V25A) or in PA (R443K) increased the virulence of the WT-Venus-H5N1 virus in mice and that the presence of both of these mutations substantially enhanced the pathogenicity of the virus. Our results suggest roles for PB2 and PA in the stable maintenance of a foreign protein as an NS1 fusion protein in influenza A virus. IMPORTANCE The ability to visualize influenza viruses has far-reaching benefits in influenza virus research. Previously, we reported that an H5N1 virus bearing the Venus reporter gene became more pathogenic to mice and that its reporter gene was more highly expressed and more stably maintained after mouse adaptation. Here, we investigated the molecular determinants behind this enhanced virulence and reporter stability. We found that mutations in PB2 (V25A) and PA (R443K) play crucial roles in the stable maintenance of a foreign protein as an NS1 fusion protein in influenza A virus and in the virulence of influenza virus in mice. Our findings further our knowledge of the pathogenicity of influenza virus in mammals and will help advance influenza virus-related live-imaging studies in vitro and in vivo.
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138
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Influenza and Bacterial Superinfection: Illuminating the Immunologic Mechanisms of Disease. Infect Immun 2015. [PMID: 26216421 DOI: 10.1128/iai.00298-15] [Citation(s) in RCA: 192] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Seasonal influenza virus infection presents a major strain on the health care system. Influenza virus infection has pandemic potential, which was repeatedly observed during the last century. Severe disease may occur in the young, in the elderly, in those with preexisting lung disease, and in previously healthy individuals. A common cause of severe influenza pathogenesis is superinfection with bacterial pathogens, namely, Staphylococcus aureus and Streptococcus pneumoniae. A great deal of recent research has focused on the immune pathways involved in influenza-induced susceptibility to secondary bacterial pneumonia. Both innate and adaptive antibacterial host defenses are impaired in the context of preceding influenza virus infection. The goal of this minireview is to highlight these findings and synthesize these data into a shared central theme of pathogenesis.
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139
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Gutiérrez-Martínez E, Planès R, Anselmi G, Reynolds M, Menezes S, Adiko AC, Saveanu L, Guermonprez P. Cross-Presentation of Cell-Associated Antigens by MHC Class I in Dendritic Cell Subsets. Front Immunol 2015; 6:363. [PMID: 26236315 PMCID: PMC4505393 DOI: 10.3389/fimmu.2015.00363] [Citation(s) in RCA: 111] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2015] [Accepted: 07/05/2015] [Indexed: 12/12/2022] Open
Abstract
Dendritic cells (DCs) have the unique ability to pick up dead cells carrying antigens in tissue and migrate to the lymph nodes where they can cross-present cell-associated antigens by MHC class I to CD8+ T cells. There is strong in vivo evidence that the mouse XCR1+ DCs subset acts as a key player in this process. The intracellular processes underlying cross-presentation remain controversial and several pathways have been proposed. Indeed, a wide number of studies have addressed the cellular process of cross-presentation in vitro using a variety of sources of antigen and antigen-presenting cells. Here, we review the in vivo and in vitro evidence supporting the current mechanistic models and disscuss their physiological relevance to the cross-presentation of cell-associated antigens by DCs subsets.
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Affiliation(s)
- Enric Gutiérrez-Martínez
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
| | - Remi Planès
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
| | - Giorgio Anselmi
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
| | - Matthew Reynolds
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
| | - Shinelle Menezes
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
| | - Aimé Cézaire Adiko
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, Centre for Molecular & Cellular Biology of Inflammation (CMCBI), King's College London , Paris , France ; Sorbonne Paris Cité, Université Paris Diderot , Paris , France
| | - Loredana Saveanu
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, Centre for Molecular & Cellular Biology of Inflammation (CMCBI), King's College London , Paris , France ; Sorbonne Paris Cité, Université Paris Diderot , Paris , France
| | - Pierre Guermonprez
- Laboratory of Phagocyte Immunobiology, Peter Gorer Department of Immunobiology, CMCBI, King's College London , London , UK
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140
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Széles L, Meissner F, Dunand-Sauthier I, Thelemann C, Hersch M, Singovski S, Haller S, Gobet F, Fuertes Marraco SA, Mann M, Garcin D, Acha-Orbea H, Reith W. TLR3-Mediated CD8+ Dendritic Cell Activation Is Coupled with Establishment of a Cell-Intrinsic Antiviral State. THE JOURNAL OF IMMUNOLOGY 2015; 195:1025-33. [PMID: 26101320 DOI: 10.4049/jimmunol.1402033] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 05/20/2015] [Indexed: 01/13/2023]
Abstract
Because of their unique capacity to cross-present Ags to CD8(+) T cells, mouse lymphoid tissue-resident CD8(+) dendritic cells (DCs) and their migratory counterparts are critical for priming antiviral T cell responses. High expression of the dsRNA sensor TLR3 is a distinctive feature of these cross-presenting DC subsets. TLR3 engagement in CD8(+) DCs promotes cross-presentation and the acquisition of effector functions required for driving antiviral T cell responses. In this study, we performed a comprehensive analysis of the TLR3-induced antiviral program and cell-autonomous immunity in CD8(+) DC lines and primary CD8(+) DCs. We found that TLR3-ligand polyinosinic-polycytidylic acid and human rhinovirus infection induced a potent antiviral protection against Sendai and vesicular stomatitis virus in a TLR3 and type I IFN receptor-dependent manner. Polyinosinic-polycytidylic acid-induced antiviral genes were identified by mass spectrometry-based proteomics and transcriptomics in the CD8(+) DC line. Nanostring nCounter experiments confirmed that these antiviral genes were induced by TLR3 engagement in primary CD8(+) DCs, and indicated that many are secondary TLR3-response genes requiring autocrine IFN-β stimulation. TLR3-activation thus establishes a type I IFN-dependent antiviral program in a DC subtype playing crucial roles in priming adaptive antiviral immune responses. This mechanism is likely to shield the priming of antiviral responses against inhibition or abrogation by the viral infection. It could be particularly relevant for viruses detected mainly by TLR3, which may not trigger type I IFN production by DCs that lack TLR3, such as plasmacytoid DCs or CD8(-) DCs.
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Affiliation(s)
- Lajos Széles
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, CH-1211 Geneva, Switzerland
| | - Felix Meissner
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, D-82152 Martinsried, Germany
| | - Isabelle Dunand-Sauthier
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, CH-1211 Geneva, Switzerland
| | - Christoph Thelemann
- Department of Biochemistry, University of Lausanne, CH-1066 Epalinges, Switzerland
| | - Micha Hersch
- Computational Biology Group, Department of Medical Genetics, University of Lausanne, CH-1005 Lausanne, Switzerland; and
| | - Simon Singovski
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, CH-1211 Geneva, Switzerland
| | - Sergio Haller
- Department of Biochemistry, University of Lausanne, CH-1066 Epalinges, Switzerland
| | - Florian Gobet
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, CH-1211 Geneva, Switzerland
| | | | - Matthias Mann
- Proteomics and Signal Transduction, Max Planck Institute of Biochemistry, D-82152 Martinsried, Germany
| | - Dominique Garcin
- Department of Microbiology and Molecular Medicine, Faculty of Medicine, University of Geneva, CH-1211 Geneva, Switzerland
| | - Hans Acha-Orbea
- Department of Biochemistry, University of Lausanne, CH-1066 Epalinges, Switzerland
| | - Walter Reith
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, CH-1211 Geneva, Switzerland;
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141
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Zhang Y, Chen G, Liu Z, Tian S, Zhang J, Carey CD, Murphy KM, Storkus WJ, Falo LD, You Z. Genetic vaccines to potentiate the effective CD103+ dendritic cell-mediated cross-priming of antitumor immunity. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2015; 194:5937-47. [PMID: 25972487 PMCID: PMC4458448 DOI: 10.4049/jimmunol.1500089] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Accepted: 04/16/2015] [Indexed: 12/24/2022]
Abstract
The development of effective cancer vaccines remains an urgent, but as yet unmet, clinical need. This deficiency is in part due to an incomplete understanding of how to best invoke dendritic cells (DC) that are crucial for the induction of tumor-specific CD8(+) T cells capable of mediating durable protective immunity. In this regard, elevated expression of the transcription factor X box-binding protein 1 (XBP1) in DC appears to play a decisive role in promoting the ability of DC to cross-present Ags to CD8(+) T cells in the therapeutic setting. Delivery of DNA vaccines encoding XBP1 and tumor Ag to skin DC resulted in increased IFN-α production by plasmacytoid DC (pDC) from skin/tumor draining lymph nodes and the cross-priming of Ag-specific CD8(+) T cell responses associated with therapeutic benefit. Antitumor protection was dependent on cross-presenting Batf3(+) DC, pDC, and CD8(+) T cells. CD103(+) DC from the skin/tumor draining lymph nodes of the immunized mice appeared responsible for activation of Ag-specific naive CD8(+) T cells, but were dependent on pDC for optimal effectiveness. Similarly, human XBP1 improved the capacity of human blood- and skin-derived DC to activate human T cells. These data support an important intrinsic role for XBP1 in DC for effective cross-priming and orchestration of Batf3(+) DC-pDC interactions, thereby enabling effective vaccine induction of protective antitumor immunity.
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Affiliation(s)
- Yi Zhang
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Guo Chen
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Zuqiang Liu
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Shenghe Tian
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Jiying Zhang
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Cara D Carey
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213
| | - Kenneth M Murphy
- Department of Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110; Howard Hughes Medical Institute, Washington University School of Medicine, St. Louis, MO 63110
| | - Walter J Storkus
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213; and University of Pittsburgh Cancer Institute, Pittsburgh, PA 15213
| | - Louis D Falo
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213; and University of Pittsburgh Cancer Institute, Pittsburgh, PA 15213
| | - Zhaoyang You
- Department of Dermatology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213; Department of Immunology, University of Pittsburgh School of Medicine, Pittsburgh, PA 15213; and University of Pittsburgh Cancer Institute, Pittsburgh, PA 15213
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142
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Li HS, Watowich SS. Innate immune regulation by STAT-mediated transcriptional mechanisms. Immunol Rev 2015; 261:84-101. [PMID: 25123278 DOI: 10.1111/imr.12198] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The term innate immunity typically refers to a quick but non-specific host defense response against invading pathogens. The innate immune system comprises particular immune cell populations, epithelial barriers, and numerous secretory mediators including cytokines, chemokines, and defense peptides. Innate immune cells are also now recognized to play important contributing roles in cancer and pathological inflammatory conditions. Innate immunity relies on rapid signal transduction elicited upon pathogen recognition via pattern recognition receptors (PRRs) and cell:cell communication conducted by soluble mediators, including cytokines. A majority of cytokines involved in innate immune signaling use a molecular cascade encompassing receptor-associated Jak protein tyrosine kinases and STAT (signal transducer and activator of transcription) transcriptional regulators. Here, we focus on roles for STAT proteins in three major innate immune subsets: neutrophils, macrophages, and dendritic cells (DCs). While knowledge in this area is only now emerging, understanding the molecular regulation of these cell types is necessary for developing new approaches to treat human disorders such as inflammatory conditions, autoimmunity, and cancer.
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Affiliation(s)
- Haiyan S Li
- Department of Immunology, The University of Texas MD Anderson Cancer Center, Houston, TX, USA
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143
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Abstract
Dendritic cells (DCs) are a heterogeneous group of mononuclear phagocytes with versatile roles in immunity. They are classified predominantly based on phenotypic and functional properties, namely their stellate morphology, expression of the integrin CD11c, and major histocompatibility class II molecules, as well as their superior capacity to migrate to secondary lymphoid organs and stimulate naïve T cells. However, these attributes are not exclusive to DCs and often change within inflammatory or infectious environments. This led to debates over cell identification and questioned even the mere existence of DCs as distinct leukocyte lineage. Here, we review experimental approaches taken to fate map DCs and discuss how these have shaped our understanding of DC ontogeny and lineage affiliation. Considering the ontogenetic properties of DCs will help to overcome the inherent shortcomings of purely phenotypic- and function-based approaches to cell definition and will yield a more robust way of DC classification.
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Affiliation(s)
- Mateusz Pawel Poltorak
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München , Munich , Germany
| | - Barbara Ursula Schraml
- Institute for Medical Microbiology, Immunology and Hygiene, Technische Universität München , Munich , Germany
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144
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Schlitzer A, McGovern N, Ginhoux F. Dendritic cells and monocyte-derived cells: Two complementary and integrated functional systems. Semin Cell Dev Biol 2015; 41:9-22. [DOI: 10.1016/j.semcdb.2015.03.011] [Citation(s) in RCA: 158] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Revised: 03/27/2015] [Accepted: 03/31/2015] [Indexed: 12/23/2022]
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145
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Goritzka M, Makris S, Kausar F, Durant LR, Pereira C, Kumagai Y, Culley FJ, Mack M, Akira S, Johansson C. Alveolar macrophage-derived type I interferons orchestrate innate immunity to RSV through recruitment of antiviral monocytes. ACTA ACUST UNITED AC 2015; 212:699-714. [PMID: 25897172 PMCID: PMC4419339 DOI: 10.1084/jem.20140825] [Citation(s) in RCA: 199] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 03/24/2015] [Indexed: 12/24/2022]
Abstract
Goritzka et al. describe a role for recruited inflammatory monocytes in antiviral immunity and protection from RSV infection in mice. The authors demonstrate that this is critically dependent on the production of type I IFNs by alveolar macrophages triggered via RIG-I–like receptors, thus highlighting an important cell-extrinsic mechanism of type I IFN–mediated antiviral activity. Type I interferons (IFNs) are important for host defense from viral infections, acting to restrict viral production in infected cells and to promote antiviral immune responses. However, the type I IFN system has also been associated with severe lung inflammatory disease in response to respiratory syncytial virus (RSV). Which cells produce type I IFNs upon RSV infection and how this directs immune responses to the virus, and potentially results in pathological inflammation, is unclear. Here, we show that alveolar macrophages (AMs) are the major source of type I IFNs upon RSV infection in mice. AMs detect RSV via mitochondrial antiviral signaling protein (MAVS)–coupled retinoic acid–inducible gene 1 (RIG-I)–like receptors (RLRs), and loss of MAVS greatly compromises innate immune restriction of RSV. This is largely attributable to loss of type I IFN–dependent induction of monocyte chemoattractants and subsequent reduced recruitment of inflammatory monocytes (infMo) to the lungs. Notably, the latter have potent antiviral activity and are essential to control infection and lessen disease severity. Thus, infMo recruitment constitutes an important and hitherto underappreciated, cell-extrinsic mechanism of type I IFN–mediated antiviral activity. Dysregulation of this system of host antiviral defense may underlie the development of RSV-induced severe lung inflammation.
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Affiliation(s)
- Michelle Goritzka
- Centre for Respiratory Infection, Respiratory Infections Section, National Heart and Lung Institute, Imperial College London, London W2 1PG, England, UK
| | - Spyridon Makris
- Centre for Respiratory Infection, Respiratory Infections Section, National Heart and Lung Institute, Imperial College London, London W2 1PG, England, UK
| | - Fahima Kausar
- Centre for Respiratory Infection, Respiratory Infections Section, National Heart and Lung Institute, Imperial College London, London W2 1PG, England, UK
| | - Lydia R Durant
- Centre for Respiratory Infection, Respiratory Infections Section, National Heart and Lung Institute, Imperial College London, London W2 1PG, England, UK
| | - Catherine Pereira
- Centre for Respiratory Infection, Respiratory Infections Section, National Heart and Lung Institute, Imperial College London, London W2 1PG, England, UK
| | - Yutaro Kumagai
- Laboratory of Host Defense, World Premier International Immunology Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan
| | - Fiona J Culley
- Centre for Respiratory Infection, Respiratory Infections Section, National Heart and Lung Institute, Imperial College London, London W2 1PG, England, UK
| | - Matthias Mack
- University Hospital Regensburg, 93042 Regensburg, Germany
| | - Shizuo Akira
- Laboratory of Host Defense, World Premier International Immunology Frontier Research Center, Osaka University, Suita, Osaka 565-0871, Japan
| | - Cecilia Johansson
- Centre for Respiratory Infection, Respiratory Infections Section, National Heart and Lung Institute, Imperial College London, London W2 1PG, England, UK
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146
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Abstract
Cross-presentation designates the presentation of exogenous antigens on major histocompatibility complex class I molecules and is essential for the initiation of cytotoxic immune responses. It is now well established that dendritic cells (DCs) are the best cross-presenting cells. In this chapter, we will discuss recent advances in our understanding of the molecular mechanisms of cross-presentation. We will also describe the different DC subsets identified in mouse and human, and their functional specialization for cross-presentation. Finally, we will summarize the current knowledge of the role of cross-presentation in pathological situations.
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Affiliation(s)
- Elodie Segura
- Institut Curie, Paris Cedex 05, France; INSERM U932, Paris Cedex 05, France.
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147
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Divangahi M, King IL, Pernet E. Alveolar macrophages and type I IFN in airway homeostasis and immunity. Trends Immunol 2015; 36:307-14. [PMID: 25843635 DOI: 10.1016/j.it.2015.03.005] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Revised: 03/10/2015] [Accepted: 03/10/2015] [Indexed: 12/24/2022]
Abstract
Globally, respiratory infections cause more than 4 million deaths per year, with influenza and tuberculosis (TB) in particular being major causes of mortality and morbidity. Although immune cell activation is critical for killing respiratory pathogens, this response must be tightly regulated to effectively control and eliminate invading microorganisms while minimizing immunopathology and maintaining pulmonary function. The distinct microenvironment of the lung is constantly patrolled by alveolar macrophages (Mφ), which are essential for tissue homeostasis, early pathogen recognition, initiation of the local immune response, and resolution of inflammation. Here, we focus on recent advances that have provided insight into the relation between pulmonary Mφ, type I interferon (IFN) signaling, and the delicate balance between protective and pathological immune responses in the lung.
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Affiliation(s)
- Maziar Divangahi
- Department of Medicine, Department of Pathology, McGill International TB Centre, McGill University Health Centre, Meakins-Christie Laboratories, Montreal, QC, Canada; Department of Microbiology and Immunology, Microbiome and Disease Tolerance Centre, McGill University, Montreal, QC, Canada.
| | - Irah L King
- Department of Microbiology and Immunology, Microbiome and Disease Tolerance Centre, McGill University, Montreal, QC, Canada
| | - Erwan Pernet
- Department of Medicine, Department of Pathology, McGill International TB Centre, McGill University Health Centre, Meakins-Christie Laboratories, Montreal, QC, Canada
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148
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Fukuyama S, Katsura H, Zhao D, Ozawa M, Ando T, Shoemaker JE, Ishikawa I, Yamada S, Neumann G, Watanabe S, Kitano H, Kawaoka Y. Multi-spectral fluorescent reporter influenza viruses (Color-flu) as powerful tools for in vivo studies. Nat Commun 2015; 6:6600. [PMID: 25807527 PMCID: PMC4389232 DOI: 10.1038/ncomms7600] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2014] [Accepted: 02/10/2015] [Indexed: 12/31/2022] Open
Abstract
Seasonal influenza A viruses cause annual epidemics of respiratory disease; highly pathogenic avian H5N1 and the recently emerged H7N9 viruses cause severe infections in humans, often with fatal outcomes. Although numerous studies have addressed the pathogenicity of influenza viruses, influenza pathogenesis remains incompletely understood. Here we generate influenza viruses expressing fluorescent proteins of different colours ('Color-flu' viruses) to facilitate the study of viral infection in in vivo models. On adaptation to mice, stable expression of the fluorescent proteins in infected animals allows their detection by different types of microscopy and by flow cytometry. We use this system to analyse the progression of viral spread in mouse lungs, for live imaging of virus-infected cells, and for differential gene expression studies in virus antigen-positive and virus antigen-negative live cells in the lungs of Color-flu-infected mice. Collectively, Color-flu viruses are powerful tools to analyse virus infections at the cellular level in vivo to better understand influenza pathogenesis.
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Affiliation(s)
- Satoshi Fukuyama
- Exploratory Research for Advanced Technology Infection-Induced Host Responses Project, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
| | - Hiroaki Katsura
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
| | - Dongming Zhao
- Exploratory Research for Advanced Technology Infection-Induced Host Responses Project, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
| | - Makoto Ozawa
- Laboratory of Animal Hygiene, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan
- Transboundary Animal Distance Center, Joint Faculty of Veterinary Medicine, Kagoshima University, Kagoshima 890-0065, Japan
| | - Tomomi Ando
- Exploratory Research for Advanced Technology Infection-Induced Host Responses Project, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
| | - Jason E. Shoemaker
- Exploratory Research for Advanced Technology Infection-Induced Host Responses Project, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
| | - Izumi Ishikawa
- Exploratory Research for Advanced Technology Infection-Induced Host Responses Project, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
| | - Shinya Yamada
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
| | - Gabriele Neumann
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin 53711, USA
| | - Shinji Watanabe
- Exploratory Research for Advanced Technology Infection-Induced Host Responses Project, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
- Laboratory of Veterinary Microbiology, Department of Veterinary Sciences, University of Miyazaki, Miyazaki 889-2192, Japan
| | - Hiroaki Kitano
- Exploratory Research for Advanced Technology Infection-Induced Host Responses Project, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
- The Systems Biology Institute, Minato-ku, Tokyo 108-0071, Japan
- Sony Computer Science Laboratories, Shinagawa-ku, Tokyo 141-0022, Japan
- Okinawa Institute of Science and Technology Graduate University, Onna-son, Okinawa 904-0495, Japan
| | - Yoshihiro Kawaoka
- Exploratory Research for Advanced Technology Infection-Induced Host Responses Project, Japan Science and Technology Agency (JST), Kawaguchi, Saitama 332-0012, Japan
- Division of Virology, Department of Microbiology and Immunology, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin 53711, USA
- Department of Special Pathogens, International Research Center for Infectious Diseases, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo 108-8639, Japan
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149
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Pritzl CJ, Seo YJ, Xia C, Vijayan M, Stokes ZD, Hahm B. A ceramide analogue stimulates dendritic cells to promote T cell responses upon virus infections. THE JOURNAL OF IMMUNOLOGY 2015; 194:4339-49. [PMID: 25810392 DOI: 10.4049/jimmunol.1402672] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 02/24/2015] [Indexed: 12/20/2022]
Abstract
The ceramide family of lipids plays important roles in both cell structure and signaling in a diverse array of cell types, including immune cells. However, very little is known regarding how ceramide affects the activation of dendritic cells (DCs) in response to viral infection. In this study, we demonstrate that a synthetic ceramide analog (C8) stimulates DCs to increase the expansion of virus-specific T cells upon virus infection. Exogenously supplied C8 ceramide elevated the expression of DC maturation markers such as MHC class I and costimulatory molecules following infection with the clone 13 strain of lymphocytic choriomeningitis virus (LCMV) or influenza virus. Importantly, ceramide-conditioned, LCMV-infected DCs displayed an increased ability to promote expansion of virus-specific CD8(+) T cells when compared with virus-infected DCs. Furthermore, a locally instilled ceramide analog significantly increased virus-reactive T cell responses in vivo to both LCMV and influenza virus infections. Collectively, these findings provide new insights into ceramide-mediated regulation of DC responses against virus infection and help us establish a foundation for novel immune-stimulatory therapeutics.
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Affiliation(s)
- Curtis J Pritzl
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| | - Young-Jin Seo
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| | - Chuan Xia
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| | - Madhuvanthi Vijayan
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| | - Zachary D Stokes
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
| | - Bumsuk Hahm
- Department of Surgery, University of Missouri, Columbia, MO 65212; andDepartment of Molecular Microbiology and Immunology, University of Missouri, Columbia, MO 65212
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150
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Baharom F, Thomas S, Bieder A, Hellmér M, Volz J, Sandgren KJ, McInerney GM, Karlsson Hedestam GB, Mellman I, Smed-Sörensen A. Protection of human myeloid dendritic cell subsets against influenza A virus infection is differentially regulated upon TLR stimulation. THE JOURNAL OF IMMUNOLOGY 2015; 194:4422-30. [PMID: 25801434 DOI: 10.4049/jimmunol.1402671] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 02/18/2015] [Indexed: 12/24/2022]
Abstract
The proinflammatory microenvironment in the respiratory airway induces maturation of both resident and infiltrating dendritic cells (DCs) upon influenza A virus (IAV) infection. This results in upregulation of antiviral pathways as well as modulation of endocytic processes, which affect the susceptibility of DCs to IAV infection. Therefore, it is highly relevant to understand how IAV interacts with and infects mature DCs. To investigate how different subsets of human myeloid DCs (MDCs) involved in tissue inflammation are affected by inflammatory stimulation during IAV infection, we stimulated primary blood MDCs and inflammatory monocyte-derived DCs (MDDCs) with TLR ligands, resulting in maturation. Interestingly, MDDCs but not MDCs were protected against IAV infection after LPS (TLR4) stimulation. In contrast, stimulation with TLR7/8 ligand protected MDCs but not MDDCs from IAV infection. The reduced susceptibility to IAV infection correlated with induction of type I IFNs. We found that differential expression of TLR4, TRIF, and MyD88 in the two MDC subsets regulated the ability of the cells to enter an antiviral state upon maturation. This difference was functionally confirmed using small interfering RNA and inhibitors. Our data show that different human MDC subsets may play distinct roles during IAV infection, as their capacity to induce type I IFNs is dependent on TLR-specific maturation, resulting in differential susceptibility to IAV infection.
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Affiliation(s)
- Faezzah Baharom
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, 171 76 Stockholm, Sweden; Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 171 77 Stockholm, Sweden; and
| | - Saskia Thomas
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, 171 76 Stockholm, Sweden; Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 171 77 Stockholm, Sweden; and
| | - Andrea Bieder
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, 171 76 Stockholm, Sweden; Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 171 77 Stockholm, Sweden; and
| | - Maria Hellmér
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, 171 76 Stockholm, Sweden; Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 171 77 Stockholm, Sweden; and
| | - Julia Volz
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, 171 76 Stockholm, Sweden; Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 171 77 Stockholm, Sweden; and
| | - Kerrie J Sandgren
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, 171 76 Stockholm, Sweden
| | - Gerald M McInerney
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 171 77 Stockholm, Sweden; and
| | | | - Ira Mellman
- Genentech, Inc., South San Francisco, CA 94080
| | - Anna Smed-Sörensen
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, 171 76 Stockholm, Sweden; Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, 171 77 Stockholm, Sweden; and
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