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Cardenas M, Seibert B, Cowan B, Fraiha ALS, Carnaccini S, Gay LC, Faccin FC, Caceres CJ, Anderson TK, Vincent Baker AL, Perez DR, Rajao DS. Amino acid 138 in the HA of a H3N2 subtype influenza A virus increases affinity for the lower respiratory tract and alveolar macrophages in pigs. PLoS Pathog 2024; 20:e1012026. [PMID: 38377132 PMCID: PMC10906893 DOI: 10.1371/journal.ppat.1012026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 03/01/2024] [Accepted: 02/05/2024] [Indexed: 02/22/2024] Open
Abstract
Influenza A virus (FLUAV) infects a wide range of hosts and human-to-swine spillover events are frequently reported. However, only a few of these human viruses have become established in pigs and the host barriers and molecular mechanisms driving adaptation to the swine host remain poorly understood. We previously found that infection of pigs with a 2:6 reassortant virus (hVIC/11) containing the hemagglutinin (HA) and neuraminidase (NA) gene segments from the human strain A/Victoria/361/2011 (H3N2) and internal gene segments of an endemic swine strain (sOH/04) resulted in a fixed amino acid substitution in the HA (A138S, mature H3 HA numbering). In silico analysis revealed that S138 became predominant among swine H3N2 virus sequences deposited in public databases, while 138A predominates in human isolates. To understand the role of the HA A138S substitution in the adaptation of a human-origin FLUAV HA to swine, we infected pigs with the hVIC/11A138S mutant and analyzed pathogenesis and transmission compared to hVIC/11 and sOH/04. Our results showed that the hVIC/11A138S virus had an intermediary pathogenesis between hVIC/11 and sOH/04. The hVIC/11A138S infected the upper respiratory tract, right caudal, and both cranial lobes while hVIC/11 was only detected in nose and trachea samples. Viruses induced a distinct expression pattern of various pro-inflammatory cytokines such as IL-8, TNF-α, and IFN-β. Flow cytometric analysis of lung samples revealed a significant reduction of porcine alveolar macrophages (PAMs) in hVIC/11A138S-infected pigs compared to hVIC/11 while a MHCIIlowCD163neg population was increased. The hVIC/11A138S showed a higher affinity for PAMs than hVIC/11, noted as an increase of infected PAMs in bronchoalveolar lavage fluid (BALF), and showed no differences in the percentage of HA-positive PAMs compared to sOH/04. This increased infection of PAMs led to an increase of granulocyte-monocyte colony-stimulating factor (GM-CSF) stimulation but a reduced expression of peroxisome proliferator-activated receptor gamma (PPARγ) in the sOH/04-infected group. Analysis using the PAM cell line 3D4/21 revealed that the A138S substitution improved replication and apoptosis induction in this cell type compared to hVIC/11 but at lower levels than sOH/04. Overall, our study indicates that adaptation of human viruses to the swine host involves an increased affinity for the lower respiratory tract and alveolar macrophages.
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Affiliation(s)
- Matias Cardenas
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - Brittany Seibert
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - Brianna Cowan
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - Ana Luiza S. Fraiha
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - Silvia Carnaccini
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - L. Claire Gay
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - Flavio Cargnin Faccin
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - C. Joaquin Caceres
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - Tavis K. Anderson
- Virus and Prion Research Unit, National Animal Disease Center, United States Department of Agriculture, Agricultural Research Service, Ames, Iowa, United States of America
| | - Amy L. Vincent Baker
- Virus and Prion Research Unit, National Animal Disease Center, United States Department of Agriculture, Agricultural Research Service, Ames, Iowa, United States of America
| | - Daniel R. Perez
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
| | - Daniela S. Rajao
- Department of Population Health, College of Veterinary Medicine, University of Georgia, Athens, Georgia, United States of America
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Rivière F, Burger J, Lefèvre F, Garnier A, Vigne C, Tournier JN, Billon-Denis E. Infection with Influenzavirus A in a murine model induces epithelial bronchial lesions and distinct waves of innate immune-cell recruitment. Front Immunol 2023; 14:1241323. [PMID: 37649477 PMCID: PMC10464834 DOI: 10.3389/fimmu.2023.1241323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Accepted: 07/27/2023] [Indexed: 09/01/2023] Open
Abstract
Introduction Inflammatory lesions after Influenza A viruses (IAV) are potential therapeutic target for which better understanding of post-infection immune mechanisms is required. Most studies to evaluate innate immune reactions induced by IAV are based on quantitative/functional methods and anatomical exploration is most often non-existent. We aimed to study pulmonary damage and macrophage recruitment using two-photon excitation microscopy (TPEM) after IAV infection. Methods We infected C57BL/6 CD11c+YFP mice with A/Puerto Ricco/8/34 H1N1. We performed immune cell analysis, including flow cytometry, cytokine concentration assays, and TPEM observations after staining with anti-F4/80 antibody coupled to BV421. We adapted live lung slice (LLS) method for ex-vivo intravital microscopy to analyze cell motility. Results TPEM provided complementary data to flow cytometry and cytokine assays by allowing observation of bronchial epithelium lesions and spreading of local infection. Addition of F4/80-BV421 staining allowed us to precisely determine timing of recruitment and pulmonary migration of macrophages. Ex-vivo LLS preserved cellular viability, allowing us to observe acceleration of macrophage motility. Conclusion After IAV infection, we were able to explore structural consequences and successive waves of innate immune cell recruitment. By combining microscopy, flow cytometry and chemokine measurements, we describe novel and precise scenario of innate immune response against IAV.
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Affiliation(s)
- Frédéric Rivière
- Immunity and Pathogen Unit, Microbiology and Infectious Diseases Department, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny-sur-Orge, France
- Respiratory Department, Percy Military Teaching Hospital, Clamart, France
- Ecole du Val-de-Grâce, Paris, France
| | - Julien Burger
- Immunity and Pathogen Unit, Microbiology and Infectious Diseases Department, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny-sur-Orge, France
| | - François Lefèvre
- Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Unité de Recherche (UR) 0892 Virology and Molecular Immunology Unit, Centre de recherche Ile-de-France-Jouy-en-Josas, Jouy-en-Josas, France
| | - Annabelle Garnier
- Immunity and Pathogen Unit, Microbiology and Infectious Diseases Department, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny-sur-Orge, France
| | - Clarisse Vigne
- Immunity and Pathogen Unit, Microbiology and Infectious Diseases Department, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny-sur-Orge, France
| | - Jean-Nicolas Tournier
- Immunity and Pathogen Unit, Microbiology and Infectious Diseases Department, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny-sur-Orge, France
- Ecole du Val-de-Grâce, Paris, France
- Innovative Vaccine Laboratory, Institut Pasteur, Paris, France
| | - Emmanuelle Billon-Denis
- Immunity and Pathogen Unit, Microbiology and Infectious Diseases Department, Institut de Recherche Biomédicale des Armées (IRBA), Brétigny-sur-Orge, France
- Innovative Vaccine Laboratory, Institut Pasteur, Paris, France
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3
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Yau E, Yang L, Chen Y, Umstead TM, Atkins H, Katz ZE, Yewdell JW, Gandhi CK, Halstead ES, Chroneos ZC. Surfactant protein A alters endosomal trafficking of influenza A virus in macrophages. Front Immunol 2023; 14:919800. [PMID: 36960051 PMCID: PMC10028185 DOI: 10.3389/fimmu.2023.919800] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 02/21/2023] [Indexed: 03/09/2023] Open
Abstract
Influenza A virus infection (IAV) often leads to acute lung injury that impairs breathing and can lead to death, with disproportionate mortality in children and the elderly. Surfactant Protein A (SP-A) is a calcium-dependent opsonin that binds a variety of pathogens to help control pulmonary infections by alveolar macrophages. Alveolar macrophages play critical roles in host resistance and susceptibility to IAV infection. The effect of SP-A on IAV infection and antiviral response of macrophages, however, is not understood. Here, we report that SP-A attenuates IAV infection in a dose-dependent manner at the level of endosomal trafficking, resulting in infection delay in a model macrophage cell line. The ability of SP-A to suppress infection was independent of its glycosylation status. Binding of SP-A to hemagglutinin did not rely on the glycosylation status or sugar binding properties of either protein. Incubation of either macrophages or IAV with SP-A slowed endocytic uptake rate of IAV. SP-A interfered with binding to cell membrane and endosomal exit of the viral genome as indicated by experiments using isolated cell membranes, an antibody recognizing a pH-sensitive conformational epitope on hemagglutinin, and microscopy. Lack of SP-A in mice enhanced IFNβ expression, viral clearance and reduced mortality from IAV infection. These findings support the idea that IAV is an opportunistic pathogen that co-opts SP-A to evade host defense by alveolar macrophages. Our study highlights novel aspects of host-pathogen interactions that may lead to better understanding of the local mechanisms that shape activation of antiviral and inflammatory responses to viral infection in the lung.
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Affiliation(s)
- Eric Yau
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Linlin Yang
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Yan Chen
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Todd M. Umstead
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Hannah Atkins
- Department of Comparative Medicine, Pennsylvania State University College of Medicine, PA, Hershey, United States
| | - Zoe E. Katz
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Jonathan W. Yewdell
- Cellular Biology Section, Laboratory of Viral Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, United States
| | - Chintan K. Gandhi
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - E. Scott Halstead
- Department of Pediatrics, Division of Pediatric Critical Care Medicine, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Hershey, PA, United States
| | - Zissis C. Chroneos
- Department of Pediatrics, Division of Neonatal-Perinatal Medicine, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Hershey, PA, United States
- Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA, United States
- *Correspondence: Zissis C. Chroneos,
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Yadav A, Pandey R. Viral infectious diseases severity: co-presence of transcriptionally active microbes (TAMs) can play an integral role for disease severity. Front Immunol 2022; 13:1056036. [PMID: 36532032 PMCID: PMC9755851 DOI: 10.3389/fimmu.2022.1056036] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Accepted: 11/21/2022] [Indexed: 12/04/2022] Open
Abstract
Humans have been challenged by infectious diseases for all of their recorded history, and are continually being affected even today. Next-generation sequencing (NGS) has enabled identification of, i) culture independent microbes, ii) emerging disease-causing pathogens, and iii) understanding of the genome architecture. This, in turn, has highlighted that pathogen/s are not a monolith, and thereby allowing for the differentiation of the wide-ranging disease symptoms, albeit infected by a primary pathogen. The conventional 'one disease - one pathogen' paradigm has been positively revisited by considering limited yet important evidence of the co-presence of multiple transcriptionally active microbes (TAMs), potential pathogens, in various infectious diseases, including the COVID-19 pandemic. The ubiquitous microbiota presence inside humans gives reason to hypothesize that the microbiome, especially TAMs, contributes to disease etiology. Herein, we discuss current evidence and inferences on the co-infecting microbes particularly in the diseases caused by the RNA viruses - Influenza, Dengue, and the SARS-CoV-2. We have highlighted that the specific alterations in the microbial taxonomic abundances (dysbiosis) is functionally connected to the exposure of primary infecting pathogen/s. The microbial presence is intertwined with the differential host immune response modulating differential disease trajectories. The microbiota-host interactions have been shown to modulate the host immune responses to Influenza and SARS-CoV-2 infection, wherein the active commensal microbes are involved in the generation of virus-specific CD4 and CD8 T-cells following the influenza virus infection. Furthermore, COVID-19 dysbiosis causes an increase in inflammatory cytokines such as IL-6, TNF-α, and IL-1β, which might be one of the important predisposing factors for severe infection. Through this article, we aim to provide a comprehensive view of functional microbiomes that can have a significant regulatory impact on predicting disease severity (mild, moderate and severe), as well as clinical outcome (survival and mortality). This can offer fresh perspectives on the novel microbial biomarkers for stratifying patients for severe disease symptoms, disease prevention and augmenting treatment regimens.
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Affiliation(s)
- Aanchal Yadav
- Division of Immunology and Infectious Disease Biology, INtegrative GENomics of HOst-PathogEn (INGEN-HOPE) laboratory, CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), Delhi, India,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Rajesh Pandey
- Division of Immunology and Infectious Disease Biology, INtegrative GENomics of HOst-PathogEn (INGEN-HOPE) laboratory, CSIR-Institute of Genomics and Integrative Biology (CSIR-IGIB), Delhi, India,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India,*Correspondence: Rajesh Pandey, ;
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Shi X, Wu B, Chen J, Luo J, Li M, Jiang Z, Shi Y. Enhanced activity of NLRP3 inflammasome and its proinflammatory effect in influenza A viral pneumonia. Future Virol 2022. [DOI: 10.2217/fvl-2021-0025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Aim: The aim of this study was to investigate the activity of NLRP3 inflammasome and its effect on inducing severe pneumonia 1 week after influenza A virus (IAV) infection. Materials & methods: The expression levels of NLRP3, caspase-1 and IL-1β were assessed in murine macrophages stimulated with IAV. And the severity of viral pneumonia in mice was explored. Results & conclusion: The data showed that although the expression of NLRP3 diverged, activity of NLRP3 inflammasome was enhanced 1 week after IAV infection, and more severe viral pneumonia was associated with IL-1β in serum. It infers that enhanced activity of NLRP3 inflammasome induces augmented expression of IL-1β and severe pneumonia in a NLRP3-independent way, 1 week after IAV infection.
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Affiliation(s)
- Xiaohan Shi
- Department of MICU, Department of Respiratory & Critical Care Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, PR China
- Institute of Respiratory Diseases of Sun Yat-sen University, Guangzhou, PR China
| | - Benquan Wu
- Department of MICU, Department of Respiratory & Critical Care Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, PR China
- Institute of Respiratory Diseases of Sun Yat-sen University, Guangzhou, PR China
| | - Junxian Chen
- Department of MICU, Department of Respiratory & Critical Care Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, PR China
- Institute of Respiratory Diseases of Sun Yat-sen University, Guangzhou, PR China
| | - Jinmei Luo
- Department of MICU, Department of Respiratory & Critical Care Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, PR China
- Institute of Respiratory Diseases of Sun Yat-sen University, Guangzhou, PR China
| | - Mei Li
- VIP Healthcare Center, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, PR China
| | - ZhenYou Jiang
- Department of Microbiology & Immunology, Basic Medical College, Jinan University, Guangzhou, PR China
| | - Yunfeng Shi
- Department of MICU, Department of Respiratory & Critical Care Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, PR China
- Institute of Respiratory Diseases of Sun Yat-sen University, Guangzhou, PR China
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Kulle A, Thanabalasuriar A, Cohen TS, Szydlowska M. Resident macrophages of the lung and liver: The guardians of our tissues. Front Immunol 2022; 13:1029085. [PMID: 36532044 PMCID: PMC9750759 DOI: 10.3389/fimmu.2022.1029085] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 11/09/2022] [Indexed: 12/05/2022] Open
Abstract
Resident macrophages play a unique role in the maintenance of tissue function. As phagocytes, they are an essential first line defenders against pathogens and much of the initial characterization of these cells was focused on their interaction with viral and bacterial pathogens. However, these cells are increasingly recognized as contributing to more than just host defense. Through cytokine production, receptor engagement and gap junction communication resident macrophages tune tissue inflammatory tone, influence adaptive immune cell phenotype and regulate tissue structure and function. This review highlights resident macrophages in the liver and lung as they hold unique roles in the maintenance of the interface between the circulatory system and the external environment. As such, we detail the developmental origin of these cells, their contribution to host defense and the array of tools these cells use to regulate tissue homeostasis.
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Affiliation(s)
- Amelia Kulle
- Department of Pharmacology and Therapeutics, McGill University, Montreal, QC, Canada
| | | | - Taylor S. Cohen
- Late Stage Development, Vaccines and Immune Therapies (V&I), BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, MD, United States
| | - Marta Szydlowska
- Bacteriology and Vaccine Discovery, Research and Early Development, Vaccines and Immune Therapies (V&I), BioPharmaceuticals R&D, AstraZeneca, Gaithersburg, MD, United States,*Correspondence: Marta Szydlowska,
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7
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Li J, Sang ER, Adeyemi O, Miller LC, Sang Y. Comparative transcriptomics reveals small RNA composition and differential microRNA responses underlying interferon-mediated antiviral regulation in porcine alveolar macrophages. Front Immunol 2022; 13:1016268. [PMID: 36389683 PMCID: PMC9651005 DOI: 10.3389/fimmu.2022.1016268] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 10/03/2022] [Indexed: 09/12/2023] Open
Abstract
Previous studies have shown that interferon-mediated antiviral activity is subtype-dependent. Using a whole transcriptome procedure, we aimed to characterize the small RNA transcriptome (sRNA-Seq) and specifically the differential microRNA (miRNA) responses in porcine alveolar macrophages (PAMs) upon antiviral activation during viral infection and interferon (IFN) stimulation. Data showed that near 90% of the qualified reads of sRNA were miRNAs, and about 10% of the other sRNAs included rRNA, snoRNA, snRNA, and tRNA in order of enrichment. As the majority of sRNA (>98%) were commonly detected in all PAM samples under different treatments, about 2% sRNA were differentially expressed between the different antiviral treatments. Focusing on miRNA, 386 miRNA were profiled, including 331 known and 55 novel miRNA sequences, of which most were ascribed to miRNA families conserved among vertebrates, particularly mammalian species. Of the miRNA profiles comparably generated across the different treatments, in general, significantly differentially expressed miRNA (SEM) demonstrated that: (1) the wild-type and vaccine strains of a porcine arterivirus (a.k.a., PRRSV) induced nearly reversed patterns of up- or down-regulated SEMs; (2) similar SEM patterns were found among the treatments by the vaccine strain and antiviral IFN-α1/-ω5 subtypes; and (3) the weak antiviral IFN-ω1, however, remarked a suppressive SEM pattern as to SEMs upregulated in the antiviral treatments by the vaccine and IFN-α1/-ω5 subtypes. Further articulation identified SEMs commonly or uniquely expressed in different treatments, and experimentally validated that some SEMs including miR-10b and particularly miR-9-1 acted significantly in regulation of differential antiviral reactions stimulated by different IFN subtypes. Therefore, this study provides a general picture of porcine sRNA composition and pinpoints key SEMs underlying antiviral regulation in PAMs correlated to a typical respiratory RNA virus in pigs.
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Affiliation(s)
- Jiuyi Li
- Department of Agricultural and Environmental Sciences, College of Agriculture, Tennessee State University, Nashville, TN, United States
| | - Eric R. Sang
- USDA, Agricultural Research Service, National Animal Disease Center, Virus and Prion Research Unit, Ames, IA, United States
| | - Oluwaseun Adeyemi
- Department of Agricultural and Environmental Sciences, College of Agriculture, Tennessee State University, Nashville, TN, United States
| | - Laura C. Miller
- USDA, Agricultural Research Service, National Animal Disease Center, Virus and Prion Research Unit, Ames, IA, United States
| | - Yongming Sang
- Department of Agricultural and Environmental Sciences, College of Agriculture, Tennessee State University, Nashville, TN, United States
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8
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Li K, Cao P, McCaw JM. Modelling the Effect of MUC1 on Influenza Virus Infection Kinetics and Macrophage Dynamics. Viruses 2021; 13:v13050850. [PMID: 34066999 PMCID: PMC8150684 DOI: 10.3390/v13050850] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/20/2021] [Accepted: 05/04/2021] [Indexed: 12/11/2022] Open
Abstract
MUC1 belongs to the family of cell surface (cs-) mucins. Experimental evidence indicates that its presence reduces in vivo influenza viral infection severity. However, the mechanisms by which MUC1 influences viral dynamics and the host immune response are not yet well understood, limiting our ability to predict the efficacy of potential treatments that target MUC1. To address this limitation, we use available in vivo kinetic data for both virus and macrophage populations in wildtype and MUC1 knockout mice. We apply two mathematical models of within-host influenza dynamics to this data. The models differ in how they categorise the mechanisms of viral control. Both models provide evidence that MUC1 reduces the susceptibility of epithelial cells to influenza virus and regulates macrophage recruitment. Furthermore, we predict and compare some key infection-related quantities between the two mice groups. We find that MUC1 significantly reduces the basic reproduction number of viral replication as well as the number of cumulative macrophages but has little impact on the cumulative viral load. Our analyses suggest that the viral replication rate in the early stages of infection influences the kinetics of the host immune response, with consequences for infection outcomes, such as severity. We also show that MUC1 plays a strong anti-inflammatory role in the regulation of the host immune response. This study improves our understanding of the dynamic role of MUC1 against influenza infection and may support the development of novel antiviral treatments and immunomodulators that target MUC1.
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Affiliation(s)
- Ke Li
- School of Mathematics and Statistics, The University of Melbourne, Parkville, VIC 3010, Australia; (P.C.); (J.M.M.)
- Correspondence:
| | - Pengxing Cao
- School of Mathematics and Statistics, The University of Melbourne, Parkville, VIC 3010, Australia; (P.C.); (J.M.M.)
| | - James M. McCaw
- School of Mathematics and Statistics, The University of Melbourne, Parkville, VIC 3010, Australia; (P.C.); (J.M.M.)
- Peter Doherty Institute for Infection and Immunity, The Royal Melbourne Hospital and The University of Melbourne, Parkville, VIC 3010, Australia
- Melbourne School of Population and Global Health, The University of Melbourne, Parkville, VIC 3010, Australia
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9
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Neupane AS, Willson M, Chojnacki AK, Vargas E Silva Castanheira F, Morehouse C, Carestia A, Keller AE, Peiseler M, DiGiandomenico A, Kelly MM, Amrein M, Jenne C, Thanabalasuriar A, Kubes P. Patrolling Alveolar Macrophages Conceal Bacteria from the Immune System to Maintain Homeostasis. Cell 2020; 183:110-125.e11. [PMID: 32888431 DOI: 10.1016/j.cell.2020.08.020] [Citation(s) in RCA: 150] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 07/14/2020] [Accepted: 08/11/2020] [Indexed: 12/16/2022]
Abstract
During respiration, humans breathe in more than 10,000 liters of non-sterile air daily, allowing some pathogens access to alveoli. Interestingly, alveoli outnumber alveolar macrophages (AMs), which favors alveoli devoid of AMs. If AMs, like most tissue macrophages, are sessile, then this numerical advantage would be exploited by pathogens unless neutrophils from the blood stream intervened. However, this would translate to omnipresent persistent inflammation. Developing in vivo real-time intravital imaging of alveoli revealed AMs crawling in and between alveoli using the pores of Kohn. Importantly, these macrophages sensed, chemotaxed, and, with high efficiency, phagocytosed inhaled bacterial pathogens such as P. aeruginosa and S. aureus, cloaking the bacteria from neutrophils. Impairing AM chemotaxis toward bacteria induced superfluous neutrophil recruitment, leading to inappropriate inflammation and injury. In a disease context, influenza A virus infection impaired AM crawling via the type II interferon signaling pathway, and this greatly increased secondary bacterial co-infection.
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Affiliation(s)
- Arpan Sharma Neupane
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB T2N 4N1, Canada; Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Michelle Willson
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB T2N 4N1, Canada; Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada
| | | | - Fernanda Vargas E Silva Castanheira
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB T2N 4N1, Canada; Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Christopher Morehouse
- Microbial Sciences, Biopharmaceuticals R&D, AstraZeneca, 1 MedImmune Way, Gaithersburg, MD 20878, USA
| | - Agostina Carestia
- Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Ashley Elaine Keller
- Microbial Sciences, Biopharmaceuticals R&D, AstraZeneca, 1 MedImmune Way, Gaithersburg, MD 20878, USA
| | - Moritz Peiseler
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB T2N 4N1, Canada; Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Antonio DiGiandomenico
- Microbial Sciences, Biopharmaceuticals R&D, AstraZeneca, 1 MedImmune Way, Gaithersburg, MD 20878, USA
| | - Margaret Mary Kelly
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Matthias Amrein
- Department of Cell Biology and Anatomy, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Craig Jenne
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Microbiology and Infectious Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada; Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada
| | - Ajitha Thanabalasuriar
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB T2N 4N1, Canada; Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Pharmacology and Therapeutics, Faculty of Medicine, McGill University, Montreal Canada H3G1Y6; Microbial Sciences, Biopharmaceuticals R&D, AstraZeneca, 1 MedImmune Way, Gaithersburg, MD 20878, USA.
| | - Paul Kubes
- Department of Physiology and Pharmacology, University of Calgary, Calgary, AB T2N 4N1, Canada; Department of Microbiology and Infectious Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada; Calvin, Phoebe, and Joan Snyder Institute for Chronic Diseases, University of Calgary, Calgary, AB T2N 4N1, Canada.
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10
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Schneider DJ, Smith KA, Latuszek CE, Wilke CA, Lyons DM, Penke LR, Speth JM, Marthi M, Swanson JA, Moore BB, Lauring AS, Peters‐Golden M. Alveolar macrophage-derived extracellular vesicles inhibit endosomal fusion of influenza virus. EMBO J 2020; 39:e105057. [PMID: 32643835 PMCID: PMC7429743 DOI: 10.15252/embj.2020105057] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Revised: 06/05/2020] [Accepted: 06/15/2020] [Indexed: 01/09/2023] Open
Abstract
Alveolar macrophages (AMs) and epithelial cells (ECs) are the lone resident lung cells positioned to respond to pathogens at early stages of infection. Extracellular vesicles (EVs) are important vectors of paracrine signaling implicated in a range of (patho)physiologic contexts. Here we demonstrate that AMs, but not ECs, constitutively secrete paracrine activity localized to EVs which inhibits influenza infection of ECs in vitro and in vivo. AMs exposed to cigarette smoke extract lost the inhibitory activity of their secreted EVs. Influenza strains varied in their susceptibility to inhibition by AM-EVs. Only those exhibiting early endosomal escape and high pH of fusion were inhibited via a reduction in endosomal pH. By contrast, strains exhibiting later endosomal escape and lower fusion pH proved resistant to inhibition. These results extend our understanding of how resident AMs participate in host defense and have broader implications in the defense and treatment of pathogens internalized within endosomes.
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Affiliation(s)
- Daniel J Schneider
- Division of Pulmonary and Critical Care MedicineDepartment of Internal MedicineUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Katherine A Smith
- Division of Pulmonary and Critical Care MedicineDepartment of Internal MedicineUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Catrina E Latuszek
- Division of Pulmonary and Critical Care MedicineDepartment of Internal MedicineUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Carol A Wilke
- Division of Pulmonary and Critical Care MedicineDepartment of Internal MedicineUniversity of Michigan Medical SchoolAnn ArborMIUSA
- Department of Microbiology and ImmunologyUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Danny M Lyons
- Department of Microbiology and ImmunologyUniversity of Michigan Medical SchoolAnn ArborMIUSA
- Division of Infectious DiseaseDepartment of Internal MedicineUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Loka R Penke
- Division of Pulmonary and Critical Care MedicineDepartment of Internal MedicineUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Jennifer M Speth
- Division of Pulmonary and Critical Care MedicineDepartment of Internal MedicineUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Matangi Marthi
- Department of Microbiology and ImmunologyUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Joel A Swanson
- Department of Microbiology and ImmunologyUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Bethany B Moore
- Division of Pulmonary and Critical Care MedicineDepartment of Internal MedicineUniversity of Michigan Medical SchoolAnn ArborMIUSA
- Department of Microbiology and ImmunologyUniversity of Michigan Medical SchoolAnn ArborMIUSA
- Graduate Program in ImmunologyUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Adam S Lauring
- Department of Microbiology and ImmunologyUniversity of Michigan Medical SchoolAnn ArborMIUSA
- Division of Infectious DiseaseDepartment of Internal MedicineUniversity of Michigan Medical SchoolAnn ArborMIUSA
- Graduate Program in ImmunologyUniversity of Michigan Medical SchoolAnn ArborMIUSA
| | - Marc Peters‐Golden
- Division of Pulmonary and Critical Care MedicineDepartment of Internal MedicineUniversity of Michigan Medical SchoolAnn ArborMIUSA
- Graduate Program in ImmunologyUniversity of Michigan Medical SchoolAnn ArborMIUSA
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11
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Diverse and Unexpected Roles of Human Monocytes/Macrophages in the Immune Response to Influenza Virus. Viruses 2020; 12:v12040379. [PMID: 32244278 PMCID: PMC7232416 DOI: 10.3390/v12040379] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 03/23/2020] [Accepted: 03/27/2020] [Indexed: 12/17/2022] Open
Abstract
Human monocytes/macrophages play a central role in the immune response and defense of the host from influenza virus infection. They classically act as antigen-presenting cells for lymphocytes in the context of an immune cell cluster. In that setting, however, monocytes/macrophages exhibit additional, unexpected, roles. They are required for influenza virus infection of the lymphocytes in the cluster, and they are responsible for lymphocyte apoptosis via their synthesis and expression of the viral neuraminidase. Surprisingly, human alveolar macrophages, expected to be among the first cells to encounter the virus, are not susceptible to direct infection by a human influenza virus but can be infected when the virus is complexed with an antibody. Such monocyte/macrophage responses to influenza virus challenge should be considered part of a very complex but quite effective defense, since the common outcome is recovery of the host with development of immunity to the challenging strain of virus.
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12
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Meischel T, Villalon-Letelier F, Saunders PM, Reading PC, Londrigan SL. Influenza A virus interactions with macrophages: Lessons from epithelial cells. Cell Microbiol 2020; 22:e13170. [PMID: 31990121 DOI: 10.1111/cmi.13170] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 11/24/2019] [Accepted: 12/19/2019] [Indexed: 12/25/2022]
Abstract
Influenza viruses are an important cause of respiratory infection worldwide. In humans, infection with seasonal influenza A virus (IAV) is generally restricted to the respiratory tract where productive infection of airway epithelial cells promotes viral amplification, dissemination, and disease. Alveolar macrophages (MΦ) are also among the first cells to detect and respond to IAV, where they play a pivotal role in mounting effective innate immune responses. In contrast to epithelial cells, IAV infection of MΦ is a "dead end" for most seasonal strains, where replication is abortive and newly synthesised virions are not released. Although the key replicative stages leading to productive IAV infection in epithelial cells are defined, there is limited knowledge about the abortive IAV life cycle in MΦ. In this review, we will explore host factors and viral elements that support the early stages (entry) through to the late stages (viral egress) of IAV replication in epithelial cells. Similarities, differences, and unknowns for each key stage of the IAV replicative cycle in MΦ will then be highlighted. Herein, we provide mechanistic insights into MΦ-specific control of seasonal IAV replication through abortive infection, which may in turn, contribute to effective host defence.
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Affiliation(s)
- Tina Meischel
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Fernando Villalon-Letelier
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Philippa M Saunders
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Patrick C Reading
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia.,WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Sarah L Londrigan
- Department of Microbiology and Immunology, The University of Melbourne at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
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13
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Londrigan SL, Wakim LM, Smith J, Haverkate AJ, Brooks AG, Reading PC. IFITM3 and type I interferons are important for the control of influenza A virus replication in murine macrophages. Virology 2019; 540:17-22. [PMID: 31731106 DOI: 10.1016/j.virol.2019.11.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 10/31/2019] [Accepted: 11/04/2019] [Indexed: 12/23/2022]
Abstract
Abortive infection of macrophages serves as a "dead end" for most seasonal influenza A virus (IAV) strains, and it is likely to contribute to effective host defence. Interferon (IFN)-induced transmembrane protein 3 (IFITM3) restricts the early stages of IAV replication in epithelial cells, but IFITM3 restriction of IAV replication in macrophages has not been previously investigated. Herein, macrophages isolated from IFITM3-deficient mice were more susceptible to initial IAV infection, but late-stage viral replication was still controlled through abortive infection. Strikingly, IFNα/β receptor (IFNAR)-deficient macrophages infected with IAV were not only more susceptible to initial infection, but these cells also supported productive viral replication. Significantly, we have established that abortive IAV infection in macrophages is controlled through a type I IFN-dependent mechanism, where late-stage IAV replication can proceed in the absence of type I IFN responses. These findings provide novel mechanistic insight into macrophage-specific processes that potently shut down IAV replication.
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Affiliation(s)
- Sarah L Londrigan
- Department of Microbiology and Immunology, The University of Melbourne, The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia.
| | - Linda M Wakim
- Department of Microbiology and Immunology, The University of Melbourne, The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
| | - Jeffrey Smith
- Department of Microbiology and Immunology, The University of Melbourne, The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
| | - Anne J Haverkate
- Department of Microbiology and Immunology, The University of Melbourne, The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
| | - Andrew G Brooks
- Department of Microbiology and Immunology, The University of Melbourne, The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
| | - Patrick C Reading
- Department of Microbiology and Immunology, The University of Melbourne, The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia; WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, The Peter Doherty Institute for Infection and Immunity, 792 Elizabeth St, Victoria, 3000, Australia
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14
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Belser JA, Eckert AM, Huynh T, Gary JM, Ritter JM, Tumpey TM, Maines TR. A Guide for the Use of the Ferret Model for Influenza Virus Infection. THE AMERICAN JOURNAL OF PATHOLOGY 2019; 190:11-24. [PMID: 31654637 DOI: 10.1016/j.ajpath.2019.09.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/24/2019] [Accepted: 09/26/2019] [Indexed: 12/09/2022]
Abstract
As influenza viruses continue to jump species barriers to cause human infection, assessments of disease severity and viral replication kinetics in vivo provide crucial information for public health professionals. The ferret model is a valuable resource for evaluating influenza virus pathogenicity; thus, understanding the most effective techniques for sample collection and usage, as well as the full spectrum of attainable data after experimental inoculation in this species, is paramount. This is especially true for scheduled necropsy of virus-infected ferrets, a standard component in evaluation of influenza virus pathogenicity, as necropsy findings can provide important information regarding disease severity and pathogenicity that is not otherwise available from the live animal. In this review, we describe the range of influenza viruses assessed in ferrets, the measures of experimental disease severity in this model, and optimal sample collection during necropsy of virus-infected ferrets. Collectively, this information is critical for assessing systemic involvement after influenza virus infection in mammals.
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Affiliation(s)
- Jessica A Belser
- Influenza Division, National Center for Immunization and Respiratory Diseases, Atlanta, Georgia.
| | - Alissa M Eckert
- Division of Communication Services, Office of the Associate Director for Communication, Atlanta, Georgia
| | - Thanhthao Huynh
- Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Joy M Gary
- Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Jana M Ritter
- Division of High-Consequence Pathogens and Pathology, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - Terrence M Tumpey
- Influenza Division, National Center for Immunization and Respiratory Diseases, Atlanta, Georgia
| | - Taronna R Maines
- Influenza Division, National Center for Immunization and Respiratory Diseases, Atlanta, Georgia
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15
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Starbæk SMR, Brogaard L, Dawson HD, Smith AD, Heegaard PMH, Larsen LE, Jungersen G, Skovgaard K. Animal Models for Influenza A Virus Infection Incorporating the Involvement of Innate Host Defenses: Enhanced Translational Value of the Porcine Model. ILAR J 2018; 59:323-337. [DOI: 10.1093/ilar/ily009] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 06/19/2018] [Indexed: 12/20/2022] Open
Abstract
Abstract
Influenza is a viral respiratory disease having a major impact on public health. Influenza A virus (IAV) usually causes mild transitory disease in humans. However, in specific groups of individuals such as severely obese, the elderly, and individuals with underlying inflammatory conditions, IAV can cause severe illness or death. In this review, relevant small and large animal models for human IAV infection, including the pig, ferret, and mouse, are discussed. The focus is on the pig as a large animal model for human IAV infection as well as on the associated innate immune response. Pigs are natural hosts for the same IAV subtypes as humans, they develop clinical disease mirroring human symptoms, they have similar lung anatomy, and their respiratory physiology and immune responses to IAV infection are remarkably similar to what is observed in humans. The pig model shows high face and target validity for human IAV infection, making it suitable for modeling many aspects of influenza, including increased risk of severe disease and impaired vaccine response due to underlying pathologies such as low-grade inflammation. Comparative analysis of proteins involved in viral pattern recognition, interferon responses, and regulation of interferon-stimulated genes reveals a significantly higher degree of similarity between pig, ferret, and human compared with mice. It is concluded that the pig is a promising animal model displaying substantial human translational value with the ability to provide essential insights into IAV infection, pathogenesis, and immunity.
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Affiliation(s)
- Sofie M R Starbæk
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Louise Brogaard
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Harry D Dawson
- Beltsville Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland
| | - Allen D Smith
- Beltsville Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland
| | - Peter M H Heegaard
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Lars E Larsen
- National Veterinary Institute, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Gregers Jungersen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
| | - Kerstin Skovgaard
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Kongens Lyngby, Denmark
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16
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Nanomaterials for modulating innate immune cells in cancer immunotherapy. Asian J Pharm Sci 2018; 14:16-29. [PMID: 32104435 PMCID: PMC7032173 DOI: 10.1016/j.ajps.2018.07.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2018] [Revised: 06/24/2018] [Accepted: 07/04/2018] [Indexed: 12/14/2022] Open
Abstract
Cancer immunotherapy has been intensively investigated in both preclinical and clinical studies. Whereas chemotherapies use cytotoxic drugs to kill tumor cells, cancer immunotherapy is based on the ability of the immune system to fight cancer. Tumors are intimately associated with the immune system: they can suppress the immune response and/or control immune cells to support tumor growth. Immunotherapy has yielded promising results in clinical practice, but some patients show limited responses. This may reflect the complexities of the relationship between a tumor and the immune system. In an effort to improve the current immunotherapies, researchers have exploited nanomaterials in creating new strategies to cure tumors via modulation of the immune system in tumor tissues. Although extensive studies have examined the use of immune checkpoint-based immunotherapy, rather less work has focused on manipulating the innate immune cells. This review examines the recent approaches and challenges in the use of nanomaterials to modulate innate immune cells.
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17
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He W, Chen CJ, Mullarkey CE, Hamilton JR, Wong CK, Leon PE, Uccellini MB, Chromikova V, Henry C, Hoffman KW, Lim JK, Wilson PC, Miller MS, Krammer F, Palese P, Tan GS. Alveolar macrophages are critical for broadly-reactive antibody-mediated protection against influenza A virus in mice. Nat Commun 2017; 8:846. [PMID: 29018261 PMCID: PMC5635038 DOI: 10.1038/s41467-017-00928-3] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 08/07/2017] [Indexed: 12/23/2022] Open
Abstract
The aim of candidate universal influenza vaccines is to provide broad protection against influenza A and B viruses. Studies have demonstrated that broadly reactive antibodies require Fc-Fc gamma receptor interactions for optimal protection; however, the innate effector cells responsible for mediating this protection remain largely unknown. Here, we examine the roles of alveolar macrophages, natural killer cells, and neutrophils in antibody-mediated protection. We demonstrate that alveolar macrophages play a dominant role in conferring protection provided by both broadly neutralizing and non-neutralizing antibodies in mice. Our data also reveal the potential mechanisms by which alveolar macrophages mediate protection in vivo, namely antibody-induced inflammation and antibody-dependent cellular phagocytosis. This study highlights the importance of innate effector cells in establishing a broad-spectrum antiviral state, as well as providing a better understanding of how multiple arms of the immune system cooperate to achieve an optimal antiviral response following influenza virus infection or immunization.Broadly reactive antibodies that recognize influenza A virus HA can be protective, but the mechanism is not completely understood. Here, He et al. show that the inflammatory response and phagocytosis mediated by the interaction between protective antibodies and macrophages are essential for protection.
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Affiliation(s)
- Wenqian He
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Chi-Jene Chen
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Caitlin E Mullarkey
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Jennifer R Hamilton
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Christine K Wong
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Paul E Leon
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Graduate School of Biomedical Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Melissa B Uccellini
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Veronika Chromikova
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Carole Henry
- Department of Medicine, Section of Rheumatology, The Knapp Center for Lupus and Immunology Research, The Committee on Immunology, The University of Chicago, Chicago, IL, 60637, USA
| | - Kevin W Hoffman
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Jean K Lim
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Patrick C Wilson
- Department of Medicine, Section of Rheumatology, The Knapp Center for Lupus and Immunology Research, The Committee on Immunology, The University of Chicago, Chicago, IL, 60637, USA
| | - Matthew S Miller
- Department of Biochemistry and Biomedical Sciences, Institute of Infectious Diseases Research, McMaster Immunology Research Centre, McMaster University, Hamilton, ON, Canada, L8S 4K1
| | - Florian Krammer
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Peter Palese
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
| | - Gene S Tan
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
- J. Craig Venter Institute, 4120 Capricorn Lane, La Jolla, CA, 92037, USA.
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18
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Cohen TS. Role of MicroRNA in the Lung's Innate Immune Response. J Innate Immun 2016; 9:243-249. [PMID: 27915347 DOI: 10.1159/000452669] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 10/18/2016] [Indexed: 12/22/2022] Open
Abstract
The immune response to respiratory pathogens must be robust enough to defend the host yet properly constrained such that inflammation-induced tissue damage is avoided. MicroRNA (miRNA) are small noncoding RNA which posttranscriptionally influence gene expression. In this review, we discuss recent experimental evidence of the contribution of miRNA to the lung's response to bacterial and viral pathogens.
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Affiliation(s)
- Taylor S Cohen
- Department of Infectious Disease, Medimmune, Gaithersburg, MD, USA
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19
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Human Monoclonal Antibody 81.39a Effectively Neutralizes Emerging Influenza A Viruses of Group 1 and 2 Hemagglutinins. J Virol 2016; 90:10446-10458. [PMID: 27630240 PMCID: PMC5110155 DOI: 10.1128/jvi.01284-16] [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] [Received: 06/30/2016] [Accepted: 09/01/2016] [Indexed: 12/12/2022] Open
Abstract
The pandemic threat posed by emerging zoonotic influenza A viruses necessitates development of antiviral agents effective against various antigenic subtypes. Human monoclonal antibody (hMAb) targeting the hemagglutinin (HA) stalk offers a promising approach to control influenza virus infections. Here, we investigated the ability of the hMAb 81.39a to inhibit in vitro replication of human and zoonotic viruses, representing 16 HA subtypes. The majority of viruses were effectively neutralized by 81.39a at a 50% effective concentration (EC50) of <0.01 to 4.9 μg/ml. Among group 2 HA viruses tested, a single A(H7N9) virus was not neutralized at 50 μg/ml; it contained HA2-Asp19Gly, an amino acid position previously associated with resistance to neutralization by the group 2 HA-neutralizing MAb CR8020. Notably, among group 1 HA viruses, H11-H13 and H16 subtypes were not neutralized at 50 μg/ml; they shared the substitution HA2-Asp19Asn/Ala. Conversely, H9 viruses harboring HA2-Asp19Ala were fully susceptible to neutralization. Therefore, amino acid variance at HA2-Asp19 has subtype-specific adverse effects on in vitro neutralization. Mice given a single injection (15 or 45 mg/kg of body weight) at 24 or 48 h after infection with recently emerged A(H5N2), A(H5N8), A(H6N1), or A(H7N9) viruses were protected from mortality and showed drastically reduced lung viral titers. Furthermore, 81.39a protected mice infected with A(H7N9) harboring HA2-Asp19Gly, although the antiviral effect was lessened. A(H1N1)pdm09-infected ferrets receiving a single dose (25 mg/kg) had reduced viral titers and showed less lung tissue injury, despite 24- to 72-h-delayed treatment. Taken together, this study provides experimental evidence for the therapeutic potential of 81.39a against diverse influenza A viruses.
IMPORTANCE Zoonotic influenza viruses, such as A(H5N1) and A(H7N9) subtypes, have caused severe disease and deaths in humans, raising public health concerns. Development of novel anti-influenza therapeutics with a broad spectrum of activity against various subtypes is necessary to mitigate disease severity. Here, we demonstrate that the hemagglutinin (HA) stalk-targeting human monoclonal antibody 81.39a effectively neutralized the majority of influenza A viruses tested, representing 16 HA subtypes. Furthermore, delayed treatment with 81.39a significantly suppressed virus replication in the lungs, prevented dramatic body weight loss, and increased survival rates of mice infected with A(H5Nx), A(H6N1), or A(H7N9) viruses. When tested in ferrets, delayed 81.39a treatment reduced viral titers, particularly in the lower respiratory tract, and substantially alleviated disease symptoms associated with severe A(H1N1)pdm09 influenza. Collectively, our data demonstrated the effectiveness of 81.39a against both seasonal and emerging influenza A viruses.
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20
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Oh DY, Hurt AC. Using the Ferret as an Animal Model for Investigating Influenza Antiviral Effectiveness. Front Microbiol 2016; 7:80. [PMID: 26870031 PMCID: PMC4740393 DOI: 10.3389/fmicb.2016.00080] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 01/18/2016] [Indexed: 01/12/2023] Open
Abstract
The concern of the emergence of a pandemic influenza virus has sparked an increased effort toward the development and testing of novel influenza antivirals. Central to this is the animal model of influenza infection, which has played an important role in understanding treatment effectiveness and the effect of antivirals on host immune responses. Among the different animal models of influenza, ferrets can be considered the most suitable for antiviral studies as they display most of the human-like symptoms following influenza infections, they can be infected with human influenza virus without prior viral adaptation and have the ability to transmit influenza virus efficiently between one another. However, an accurate assessment of the effectiveness of an antiviral treatment in ferrets is dependent on three major experimental considerations encompassing firstly, the volume and titer of virus, and the route of viral inoculation. Secondly, the route and dose of drug administration, and lastly, the different methods used to assess clinical symptoms, viral shedding kinetics and host immune responses in the ferrets. A good understanding of these areas is necessary to achieve data that can accurately inform the human use of influenza antivirals. In this review, we discuss the current progress and the challenges faced in these three major areas when using the ferret model to measure influenza antiviral effectiveness.
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Affiliation(s)
- Ding Y Oh
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, Peter Doherty Institute for Infection and Immunity, MelbourneVIC, Australia; School of Applied and Biomedical Sciences, Federation University Australia, GippslandVIC, Australia
| | - Aeron C Hurt
- WHO Collaborating Centre for Reference and Research on Influenza, Victorian Infectious Diseases Reference Laboratory, Peter Doherty Institute for Infection and Immunity, MelbourneVIC, Australia; Melbourne School of Population and Global Health, University of Melbourne, ParkvilleVIC, Australia
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21
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Early apoptosis of porcine alveolar macrophages limits avian influenza virus replication and pro-inflammatory dysregulation. Sci Rep 2015; 5:17999. [PMID: 26642934 PMCID: PMC4672291 DOI: 10.1038/srep17999] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 11/03/2015] [Indexed: 12/21/2022] Open
Abstract
Pigs are evidently more resistant to avian than swine influenza A viruses, mediated in part through frontline epithelial cells and alveolar macrophages (AM). Although porcine AM (PAM) are crucial in influenza virus control, their mode of control is unclear. To gain insight into the possible role of PAM in the mediation of avian influenza virus resistance, we compared the host effects and replication of two avian (H2N3 and H6N1) and three mammalian (swine H1N1, human H1N1 and pandemic H1N1) influenza viruses in PAM. We found that PAM were readily susceptible to initial infection with all five avian and mammalian influenza viruses but only avian viruses caused early and extensive apoptosis (by 6 h of infection) resulting in reduced virus progeny and moderated pro-inflammation. Full length viral PB1-F2 present only in avian influenza viruses is a virulence factor that targets AM for mitochondrial-associated apoptotic cell death. With the use of reverse genetics on an avian H5N1 virus, we found that full length PB1-F2 contributed to increased apoptosis and pro-inflammation but not to reduced virus replication. Taken together, we propose that early apoptosis of PAM limits the spread of avian influenza viruses and that PB1-F2 could play a contributory role in the process.
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Yum J, Ku KB, Kim HS, Seo SH. H7N9 Influenza Virus Is More Virulent in Ferrets than 2009 Pandemic H1N1 Influenza Virus. Viral Immunol 2015; 28:590-9. [DOI: 10.1089/vim.2015.0052] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Jung Yum
- Laboratory of Influenza Research, College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
- Institute of Influenza Virus, College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
| | - Keun Bon Ku
- Laboratory of Influenza Research, College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
- Institute of Influenza Virus, College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
| | - Hyun Soo Kim
- Laboratory of Public Health, College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
| | - Sang Heui Seo
- Laboratory of Influenza Research, College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
- Institute of Influenza Virus, College of Veterinary Medicine, Chungnam National University, Daejeon, Korea
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Infection of Mouse Macrophages by Seasonal Influenza Viruses Can Be Restricted at the Level of Virus Entry and at a Late Stage in the Virus Life Cycle. J Virol 2015; 89:12319-29. [PMID: 26423941 DOI: 10.1128/jvi.01455-15] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 09/22/2015] [Indexed: 01/18/2023] Open
Abstract
UNLABELLED Airway epithelial cells are susceptible to infection with seasonal influenza A viruses (IAV), resulting in productive virus replication and release. Macrophages (MΦ) are also permissive to IAV infection; however, virus replication is abortive. Currently, it is unclear how productive infection of MΦ is impaired or the extent to which seasonal IAV replicate in MΦ. Herein, we compared mouse MΦ and epithelial cells for their ability to support genomic replication and transcription, synthesis of viral proteins, assembly of virions, and release of infectious progeny following exposure to genetically defined IAV. We confirm that seasonal IAV differ in their ability to utilize cell surface receptors for infectious entry and that this represents one level of virus restriction. Following virus entry, we demonstrate synthesis of all eight segments of genomic viral RNA (vRNA) and mRNA, as well as seven distinct IAV proteins, in IAV-infected mouse MΦ. Although newly synthesized hemagglutinin (HA) and neuraminidase (NA) glycoproteins are incorporated into the plasma membrane and expressed at the cell surface, electron microscopy confirmed that virus assembly was defective in IAV-infected MΦ, defining a second level of restriction late in the virus life cycle. IMPORTANCE Seasonal influenza A viruses (IAV) and highly pathogenic avian influenza viruses (HPAI) infect macrophages, but only HPAI replicate productively in these cells. Herein, we demonstrate that impaired virus uptake into macrophages represents one level of restriction limiting infection by seasonal IAV. Following uptake, seasonal IAV do not complete productive replication in macrophages, representing a second level of restriction. Using murine macrophages, we demonstrate that productive infection is blocked late in the virus life cycle, such that virus assembly is defective and newly synthesized virions are not released. These studies represent an important step toward identifying host-encoded factors that block replication of seasonal IAV, but not HPAI, in macrophages.
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Abstract
Alveolar macrophages (AMs) are critical for immunity against influenza A virus (IAV) infection. Depletion, hyporeactivity, and disruption of AM development and differentiation are all associated with lethal IAV infection. AMs drive the innate immune response that limits IAV infection. AMs are crucial for steady-state homeostasis of pulmonary surfactant, and in turn surfactant proteins regulate AMs and participate in host defense against IAV. Known factors that are necessary for AM function and differentiation in vivo include surfactant proteins, the growth factor GM-CSF, the hormone receptor PPARγ, and the transcription factors PU.1 and Bach2. Although PU.1 and PPARγ are downstream effectors of GM-CSF, Bach2 works independently. GM-CSF and Bach2-deficient AMs have phenotypes with immature or alternatively activated states of differentiation, respectively, and both extremes are unsuitable for surfactant homeostasis. The activation state of AMs and the local microenvironment may determine the development of symptomatic versus asymptomatic IAV infection in different individuals.
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Affiliation(s)
- E Scott Halstead
- a 1 Department of Pediatrics, Division of Pulmonary Critical Care, Medicine, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Pennsylvania State University Hershey Children's Hospital, Hershey, PA, USA
| | - Zissis C Chroneos
- b 2 Department of Pediatrics, Microbiology and Immunology, Pulmonary Immunology and Physiology Laboratory, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA
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25
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Differential Susceptibilities of Human Lung Primary Cells to H1N1 Influenza Viruses. J Virol 2015; 89:11935-44. [PMID: 26378172 DOI: 10.1128/jvi.01792-15] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Accepted: 09/09/2015] [Indexed: 01/10/2023] Open
Abstract
UNLABELLED Human alveolar epithelial cells (AECs) and alveolar macrophages (AMs) are the first lines of lung defense. Here, we report that AECs are the direct targets for H1N1 viruses that have circulated since the 2009 pandemic (H1N1pdm09). AMs are less susceptible to H1N1pdm09 virus, but they produce significantly more inflammatory cytokines than AECs from the same donor. AECs form an intact epithelial barrier that is destroyed by H1N1pdm09 infection. However, there is significant variation in the cellular permissiveness to H1N1pdm09 infection among different donors. AECs from obese donors appear to be more susceptible to H1N1pdm09 infection, whereas gender, smoking history, and age do not appear to affect AEC susceptibility. There is also a difference in response to different strains of H1N1pdm09 viruses. Compared to A/California04/09 (CA04), A/New York/1682/09 (NY1682) is more infectious and causes more epithelial barrier injury, although it stimulates less cytokine production. We further determined that a single amino acid residue substitution in NY1682 hemagglutinin is responsible for the difference in infectivity. In conclusion, this is the first study of host susceptibility of human lung primary cells and the integrity of the alveolar epithelial barrier to influenza. Further elucidation of the mechanism of increased susceptibility of AECs from obese subjects may facilitate the development of novel protection strategies against influenza virus infection. IMPORTANCE Disease susceptibility of influenza is determined by host and viral factors. Human alveolar epithelial cells (AECs) form the key line of lung defenses against pathogens. Using primary AECs from different donors, we provided cellular level evidence that obesity might be a risk factor for increased susceptibility to influenza. We also compared the infections of two closely related 2009 pandemic H1N1 strains in AECs from the same donor and identified a key viral factor that affected host susceptibility, the dominance of which may be correlated with disease epidemiology. In addition, primary human AECs can serve as a convenient and powerful model to investigate the mechanism of influenza-induced lung injury and determine the effect of genetic and epigenetic factors on host susceptibility to pandemic influenza virus infection.
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26
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Oh DY, Barr IG, Hurt AC. A novel video tracking method to evaluate the effect of influenza infection and antiviral treatment on ferret activity. PLoS One 2015; 10:e0118780. [PMID: 25738900 PMCID: PMC4349809 DOI: 10.1371/journal.pone.0118780] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 01/21/2015] [Indexed: 11/21/2022] Open
Abstract
Ferrets are the preferred animal model to assess influenza virus infection, virulence and transmission as they display similar clinical symptoms and pathogenesis to those of humans. Measures of disease severity in the ferret include weight loss, temperature rise, sneezing, viral shedding and reduced activity. To date, the only available method for activity measurement has been the assignment of an arbitrary score by a ‘blind’ observer based on pre-defined responsiveness scale. This manual scoring method is subjective and can be prone to bias. In this study, we described a novel video-tracking methodology for determining activity changes in a ferret model of influenza infection. This method eliminates the various limitations of manual scoring, which include the need for a sole ‘blind’ observer and the requirement to recognise the ‘normal’ activity of ferrets in order to assign relative activity scores. In ferrets infected with an A(H1N1)pdm09 virus, video-tracking was more sensitive than manual scoring in detecting ferret activity changes. Using this video-tracking method, oseltamivir treatment was found to ameliorate the effect of influenza infection on activity in ferret. Oseltamivir treatment of animals was associated with an improvement in clinical symptoms, including reduced inflammatory responses in the upper respiratory tract, lower body weight loss and a smaller rise in body temperature, despite there being no significant reduction in viral shedding. In summary, this novel video-tracking is an easy-to-use, objective and sensitive methodology for measuring ferret activity.
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Affiliation(s)
- Ding Yuan Oh
- WHO Collaborating Centre for Reference and Research on Influenza, VIDRL, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, 3000, Australia
- School of Applied and Biomedical Sciences, Federation University, Churchill, Victoria, 3842, Australia
- * E-mail:
| | - Ian G. Barr
- WHO Collaborating Centre for Reference and Research on Influenza, VIDRL, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, 3000, Australia
- School of Applied and Biomedical Sciences, Federation University, Churchill, Victoria, 3842, Australia
| | - Aeron C. Hurt
- WHO Collaborating Centre for Reference and Research on Influenza, VIDRL, at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, 3000, Australia
- Melbourne School of Population and Global Health, University of Melbourne, Parkville, Victoria, 3010, Australia
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27
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Abstract
Influenza viruses pose a substantial threat to human and animal health worldwide. Recent studies in mouse models have revealed an indispensable role for the innate immune system in defense against influenza virus. Recognition of the virus by innate immune receptors in a multitude of cell types activates intricate signaling networks, functioning to restrict viral replication. Downstream effector mechanisms include activation of innate immune cells and, induction and regulation of adaptive immunity. However, uncontrolled innate responses are associated with exaggerated disease, especially in pandemic influenza virus infection. Despite advances in the understanding of innate response to influenza in the mouse model, there is a large knowledge gap in humans, particularly in immunocompromised groups such as infants and the elderly. We propose here, the need for further studies in humans to decipher the role of innate immunity to influenza virus, particularly at the site of infection. These studies will complement the existing work in mice and facilitate the quest to design improved vaccines and therapeutic strategies against influenza.
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Affiliation(s)
- Michael B. A. Oldstone
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, California USA
| | - Richard W. Compans
- IDepartment of Microbiology and Immunology, Emory University, Atlanta, Georgia USA
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28
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Abstract
ABSTRACT: The importance of macrophages in the control of infections has long been documented, but macrophages have also been shown to contribute to severe influenza A virus infections. Macrophage function ranges from highly proinflammatory to wound healing and regulatory and a picture of diverse subsets with considerable plasticity in function and phenotype is emerging. Within the lung three subsets of macrophage populations have been identified: resident alveolar macrophages, interstitial macrophages and exudate-derived macrophages. Here we review model systems and techniques for defining macrophage function in vivo and discuss macrophage infection in vitro. The use of detailed phenotypic approaches and techniques to dissect the role of individual macrophage subsets in vivo promises rapid advances in this area of research.
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Affiliation(s)
- Marlynne Q Nicol
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, EH25 9RG, UK
| | - Bernadette M Dutia
- The Roslin Institute & Royal (Dick) School of Veterinary Studies, University of Edinburgh, EH25 9RG, UK
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29
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Oh DY, Lowther S, McCaw JM, Sullivan SG, Leang SK, Haining J, Arkinstall R, Kelso A, Mcvernon J, Barr IG, Middleton D, Hurt AC. Evaluation of oseltamivir prophylaxis regimens for reducing influenza virus infection, transmission and disease severity in a ferret model of household contact. J Antimicrob Chemother 2014; 69:2458-69. [PMID: 24840623 PMCID: PMC4130381 DOI: 10.1093/jac/dku146] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Revised: 03/31/2014] [Accepted: 04/03/2014] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVES The emergence of the pandemic influenza A(H1N1)pdm09 virus in 2009 saw a significant increase in the therapeutic and prophylactic use of neuraminidase inhibitors (NAIs) to mitigate the impact of this highly transmissible virus. Prior to the pandemic, many countries stockpiled NAIs and developed pandemic plans for the use of antiviral drugs, based on either treatment of high-risk individuals and/or prophylaxis of contacts. However, to date there has been a lack of in vivo models to test the efficacy of treatment or prophylaxis with NAIs, for influenza-infected individuals or exposed contacts, in a household setting. METHODS A ferret model of household contact was developed to study the efficacy of different prophylaxis regimens in preventing infection in contact ferrets exposed to influenza A(H1N1)pdm09-infected index ferrets. RESULTS Among the different prophylactic regimens, contact ferrets receiving oseltamivir prophylaxis twice daily showed better outcomes than those receiving oseltamivir once daily. Benefits included a significant delay in the time to secondary infection, lower weight loss and higher activity levels. The treatment of index ferrets at 36 h post-infection did not influence either secondary infection rates or clinical symptoms in exposed contact ferrets. Neither prophylaxis nor treatment prevented infection or reduced the duration of viral shedding, although clinical symptoms did improve in infected animals receiving prophylaxis. CONCLUSIONS Different oseltamivir prophylaxis regimens did not prevent infections, but consistently resulted in a reduction in symptoms in infected ferrets. However, oseltamivir prophylaxis failed to reduce viral titres, which warrants further investigation in humans.
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Affiliation(s)
- Ding Yuan Oh
- WHO Collaborating Centre for Reference and Research on Influenza, North Melbourne, Victoria, Australia
| | - Sue Lowther
- Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | - James M McCaw
- Vaccine and Immunisation Research Group, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, Victoria, Australia Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Sheena G Sullivan
- WHO Collaborating Centre for Reference and Research on Influenza, North Melbourne, Victoria, Australia
| | - Sook-Kwan Leang
- WHO Collaborating Centre for Reference and Research on Influenza, North Melbourne, Victoria, Australia
| | - Jessica Haining
- Australian Animal Health Laboratory, Geelong, Victoria, Australia
| | | | - Anne Kelso
- WHO Collaborating Centre for Reference and Research on Influenza, North Melbourne, Victoria, Australia
| | - Jodie Mcvernon
- Vaccine and Immunisation Research Group, Murdoch Childrens Research Institute, Royal Childrens Hospital, Parkville, Victoria, Australia Melbourne School of Population and Global Health, The University of Melbourne, Melbourne, Victoria, Australia
| | - Ian G Barr
- WHO Collaborating Centre for Reference and Research on Influenza, North Melbourne, Victoria, Australia School of Applied Sciences and Engineering, Monash University, Churchill, Victoria, Australia
| | | | - Aeron C Hurt
- WHO Collaborating Centre for Reference and Research on Influenza, North Melbourne, Victoria, Australia School of Applied Sciences and Engineering, Monash University, Churchill, Victoria, Australia
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30
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Thangavel RR, Bouvier NM. Animal models for influenza virus pathogenesis, transmission, and immunology. J Immunol Methods 2014; 410:60-79. [PMID: 24709389 PMCID: PMC4163064 DOI: 10.1016/j.jim.2014.03.023] [Citation(s) in RCA: 129] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 03/22/2014] [Accepted: 03/24/2014] [Indexed: 12/24/2022]
Abstract
In humans, infection with an influenza A or B virus manifests typically as an acute and self-limited upper respiratory tract illness characterized by fever, cough, sore throat, and malaise. However, influenza can present along a broad spectrum of disease, ranging from sub-clinical or even asymptomatic infection to a severe primary viral pneumonia requiring advanced medical supportive care. Disease severity depends upon the virulence of the influenza virus strain and the immune competence and previous influenza exposures of the patient. Animal models are used in influenza research not only to elucidate the viral and host factors that affect influenza disease outcomes in and spread among susceptible hosts, but also to evaluate interventions designed to prevent or reduce influenza morbidity and mortality in man. This review will focus on the three animal models currently used most frequently in influenza virus research - mice, ferrets, and guinea pigs - and discuss the advantages and disadvantages of each.
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Affiliation(s)
- Rajagowthamee R Thangavel
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Nicole M Bouvier
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA; Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA.
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31
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Oh DY, Hurt AC. A Review of the Antiviral Susceptibility of Human and Avian Influenza Viruses over the Last Decade. SCIENTIFICA 2014; 2014:430629. [PMID: 24800107 PMCID: PMC3995103 DOI: 10.1155/2014/430629] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 03/06/2014] [Indexed: 06/03/2023]
Abstract
Antivirals play an important role in the prevention and treatment of influenza infections, particularly in high-risk or severely ill patients. Two classes of influenza antivirals have been available in many countries over the last decade (2004-2013), the adamantanes and the neuraminidase inhibitors (NAIs). During this period, widespread adamantane resistance has developed in circulating influenza viruses rendering these drugs useless, resulting in the reliance on the most widely available NAI, oseltamivir. However, the emergence of oseltamivir-resistant seasonal A(H1N1) viruses in 2008 demonstrated that NAI-resistant viruses could also emerge and spread globally in a similar manner to that seen for adamantane-resistant viruses. Previously, it was believed that NAI-resistant viruses had compromised replication and/or transmission. Fortunately, in 2013, the majority of circulating human influenza viruses remain sensitive to all of the NAIs, but significant work by our laboratory and others is now underway to understand what enables NAI-resistant viruses to retain the capacity to replicate and transmit. In this review, we describe how the susceptibility of circulating human and avian influenza viruses has changed over the last ten years and describe some research studies that aim to understand how NAI-resistant human and avian influenza viruses may emerge in the future.
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Affiliation(s)
- Ding Yuan Oh
- WHO Collaborating Centre for Reference and Research on Influenza, 10 Wreckyn Street, North Melbourne, VIC 3051, Australia
| | - Aeron C. Hurt
- WHO Collaborating Centre for Reference and Research on Influenza, 10 Wreckyn Street, North Melbourne, VIC 3051, Australia
- School of Applied Sciences and Engineering, Monash University, Churchill, VIC 3842, Australia
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