1
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Karakus U, Mena I, Kottur J, El Zahed SS, Seoane R, Yildiz S, Chen L, Plancarte M, Lindsay L, Halpin R, Stockwell TB, Wentworth DE, Boons GJ, Krammer F, Stertz S, Boyce W, de Vries RP, Aggarwal AK, García-Sastre A. H19 influenza A virus exhibits species-specific MHC class II receptor usage. Cell Host Microbe 2024; 32:1089-1102.e10. [PMID: 38889725 PMCID: PMC11295516 DOI: 10.1016/j.chom.2024.05.018] [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: 01/10/2024] [Revised: 04/01/2024] [Accepted: 05/22/2024] [Indexed: 06/20/2024]
Abstract
Avian influenza A virus (IAV) surveillance in Northern California, USA, revealed unique IAV hemagglutinin (HA) genome sequences in cloacal swabs from lesser scaups. We found two closely related HA sequences in the same duck species in 2010 and 2013. Phylogenetic analyses suggest that both sequences belong to the recently discovered H19 subtype, which thus far has remained uncharacterized. We demonstrate that H19 does not bind the canonical IAV receptor sialic acid (Sia). Instead, H19 binds to the major histocompatibility complex class II (MHC class II), which facilitates viral entry. Unlike the broad MHC class II specificity of H17 and H18 from bat IAV, H19 exhibits a species-specific MHC class II usage that suggests a limited host range and zoonotic potential. Using cell lines overexpressing MHC class II, we rescued recombinant H19 IAV. We solved the H19 crystal structure and identified residues within the putative Sia receptor binding site (RBS) that impede Sia-dependent entry.
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Affiliation(s)
- Umut Karakus
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
| | - Ignacio Mena
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Immunology and Microbiology, The Scripps Research Institute, La Jolla, San Diego, CA 92037, USA
| | - Jithesh Kottur
- Departments of Pharmacological Sciences and Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Sara S El Zahed
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Rocío Seoane
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Soner Yildiz
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Leanne Chen
- Department of Biology, Barnard College, New York, NY 10027, USA
| | - Magdalena Plancarte
- Department of Pathology, Microbiology, and Immunology, University of California Davis School of Veterinary Medicine, Davis, CA 95616, USA
| | - LeAnn Lindsay
- Department of Pathology, Microbiology, and Immunology, University of California Davis School of Veterinary Medicine, Davis, CA 95616, USA
| | | | | | | | - Geert-Jan Boons
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, the Netherlands; Complex Carbohydrate Research Center, University of Georgia, 315 Riverbend Rd, Athens, GA 30602, USA; Bijvoet Center for Biomolecular Research, Utrecht University, 3584 CH Utrecht, the Netherlands; Department of Chemistry, University of Georgia, Athens, GA 30602, USA
| | - Florian Krammer
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Center for Vaccine Research and Pandemic Preparedness (C-VaRPP), Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Silke Stertz
- Institute of Medical Virology, University of Zurich, 8057 Zurich, Switzerland
| | - Walter Boyce
- Department of Pathology, Microbiology, and Immunology, University of California Davis School of Veterinary Medicine, Davis, CA 95616, USA
| | - Robert P de Vries
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, 3584 CG Utrecht, the Netherlands
| | - Aneel K Aggarwal
- Departments of Pharmacological Sciences and Oncological Sciences, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Adolfo García-Sastre
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Medicine, Division of Infectious Diseases, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; The Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA; Department of Pathology, Molecular and Cell-Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.
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2
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Costa VA, Holmes EC. Diversity, evolution, and emergence of fish viruses. J Virol 2024; 98:e0011824. [PMID: 38785422 PMCID: PMC11237817 DOI: 10.1128/jvi.00118-24] [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] [Indexed: 05/25/2024] Open
Abstract
The production of aquatic animals has more than doubled over the last 50 years and is anticipated to continually increase. While fish are recognized as a valuable and sustainable source of nutrition, particularly in the context of human population growth and climate change, the rapid expansion of aquaculture coincides with the emergence of highly pathogenic viruses that often spread globally through aquacultural practices. Here, we provide an overview of the fish virome and its relevance for disease emergence, with a focus on the insights gained through metagenomic sequencing, noting potential areas for future study. In particular, we describe the diversity and evolution of fish viruses, for which the majority have no known disease associations, and demonstrate how viruses emerge in fish populations, most notably at an expanding domestic-wild interface. We also show how wild fish are a powerful and tractable model system to study virus ecology and evolution more broadly and can be used to identify the major factors that shape vertebrate viromes. Central to this is a process of virus-host co-divergence that proceeds over many millions of years, combined with ongoing cross-species virus transmission.
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Affiliation(s)
- Vincenzo A. Costa
- Sydney Institute for Infectious Diseases, School of Medical Sciences, The University of Sydney, Sydney, New South Wales, Australia
| | - Edward C. Holmes
- Sydney Institute for Infectious Diseases, School of Medical Sciences, The University of Sydney, Sydney, New South Wales, Australia
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3
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Halwe NJ, Hamberger L, Sehl-Ewert J, Mache C, Schön J, Ulrich L, Calvelage S, Tönnies M, Fuchs J, Bandawane P, Loganathan M, Abbad A, Carreño JM, Bermúdez-González MC, Simon V, Kandeil A, El-Shesheny R, Ali MA, Kayali G, Budt M, Hippenstiel S, Hocke AC, Krammer F, Wolff T, Schwemmle M, Ciminski K, Hoffmann D, Beer M. Bat-borne H9N2 influenza virus evades MxA restriction and exhibits efficient replication and transmission in ferrets. Nat Commun 2024; 15:3450. [PMID: 38664395 PMCID: PMC11045726 DOI: 10.1038/s41467-024-47455-6] [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: 12/20/2023] [Accepted: 03/27/2024] [Indexed: 04/28/2024] Open
Abstract
Influenza A viruses (IAVs) of subtype H9N2 have reached an endemic stage in poultry farms in the Middle East and Asia. As a result, human infections with avian H9N2 viruses have been increasingly reported. In 2017, an H9N2 virus was isolated for the first time from Egyptian fruit bats (Rousettus aegyptiacus). Phylogenetic analyses revealed that bat H9N2 is descended from a common ancestor dating back centuries ago. However, the H9 and N2 sequences appear to be genetically similar to current avian IAVs, suggesting recent reassortment events. These observations raise the question of the zoonotic potential of the mammal-adapted bat H9N2. Here, we investigate the infection and transmission potential of bat H9N2 in vitro and in vivo, the ability to overcome the antiviral activity of the human MxA protein, and the presence of N2-specific cross-reactive antibodies in human sera. We show that bat H9N2 has high replication and transmission potential in ferrets, efficiently infects human lung explant cultures, and is able to evade antiviral inhibition by MxA in transgenic B6 mice. Together with its low antigenic similarity to the N2 of seasonal human strains, bat H9N2 fulfils key criteria for pre-pandemic IAVs.
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Affiliation(s)
- Nico Joel Halwe
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, 17493, Greifswald, Insel Riems, Germany
| | - Lea Hamberger
- Institute of Virology, Medical Center-University of Freiburg, 79104, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, 79104, Freiburg, Germany
| | - Julia Sehl-Ewert
- Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, 17493, Greifswald, Insel Riems, Germany
| | - Christin Mache
- Unit 17, Influenza and Other Respiratory Viruses, Robert Koch-Institut, Seestraße 10, 13353, Berlin, Germany
| | - Jacob Schön
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, 17493, Greifswald, Insel Riems, Germany
| | - Lorenz Ulrich
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, 17493, Greifswald, Insel Riems, Germany
| | - Sten Calvelage
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, 17493, Greifswald, Insel Riems, Germany
| | - Mario Tönnies
- HELIOS Clinic Emil von Behring, Department of Pneumology and Department of Thoracic Surgery, Chest Hospital Heckeshorn, Berlin, Germany
| | - Jonas Fuchs
- Institute of Virology, Medical Center-University of Freiburg, 79104, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, 79104, Freiburg, Germany
| | - Pooja Bandawane
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Center for Vaccine Research and Pandemic Preparedness (C-VaRPP), Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Madhumathi Loganathan
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Center for Vaccine Research and Pandemic Preparedness (C-VaRPP), Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Anass Abbad
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Center for Vaccine Research and Pandemic Preparedness (C-VaRPP), Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Juan Manuel Carreño
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Center for Vaccine Research and Pandemic Preparedness (C-VaRPP), Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Maria C Bermúdez-González
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Center for Vaccine Research and Pandemic Preparedness (C-VaRPP), Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Viviana Simon
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Center for Vaccine Research and Pandemic Preparedness (C-VaRPP), Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Division of Infectious Diseases, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
- The Global Health and Emerging Pathogens Institute, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Ahmed Kandeil
- Center of Scientific Excellence for Influenza Virus, Institute of Environmental Research and Climate Changes, National Research Centre, Giza, Egypt
- Human Link DMCC, Dubai, United Arab Emirates
| | - Rabeh El-Shesheny
- Center of Scientific Excellence for Influenza Virus, Institute of Environmental Research and Climate Changes, National Research Centre, Giza, Egypt
- Human Link DMCC, Dubai, United Arab Emirates
| | - Mohamed A Ali
- Center of Scientific Excellence for Influenza Virus, Institute of Environmental Research and Climate Changes, National Research Centre, Giza, Egypt
| | - Ghazi Kayali
- Center of Scientific Excellence for Influenza Virus, Institute of Environmental Research and Climate Changes, National Research Centre, Giza, Egypt
- Human Link DMCC, Dubai, United Arab Emirates
| | - Matthias Budt
- Unit 17, Influenza and Other Respiratory Viruses, Robert Koch-Institut, Seestraße 10, 13353, Berlin, Germany
| | - Stefan Hippenstiel
- Department of Infectious Diseases and Respiratory Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Andreas C Hocke
- Department of Infectious Diseases and Respiratory Medicine, Charité-Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt Universität zu Berlin, Berlin, Germany
| | - Florian Krammer
- Department of Microbiology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA
- Center for Vaccine Research and Pandemic Preparedness (C-VaRPP), Icahn School of Medicine at Mount Sinai, New York, NY, USA
- Department of Pathology, Molecular and Cell Based Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Thorsten Wolff
- Unit 17, Influenza and Other Respiratory Viruses, Robert Koch-Institut, Seestraße 10, 13353, Berlin, Germany
| | - Martin Schwemmle
- Institute of Virology, Medical Center-University of Freiburg, 79104, Freiburg, Germany
- Faculty of Medicine, University of Freiburg, 79104, Freiburg, Germany
| | - Kevin Ciminski
- Institute of Virology, Medical Center-University of Freiburg, 79104, Freiburg, Germany.
- Faculty of Medicine, University of Freiburg, 79104, Freiburg, Germany.
| | - Donata Hoffmann
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, 17493, Greifswald, Insel Riems, Germany.
| | - Martin Beer
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, 17493, Greifswald, Insel Riems, Germany.
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4
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Dudas G, Batson J. Accumulated metagenomic studies reveal recent migration, whole genome evolution, and undiscovered diversity of orthomyxoviruses. J Virol 2023; 97:e0105623. [PMID: 37830816 PMCID: PMC10653993 DOI: 10.1128/jvi.01056-23] [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: 07/17/2023] [Accepted: 08/29/2023] [Indexed: 10/14/2023] Open
Abstract
IMPORTANCE The number of known virus species has increased dramatically through metagenomic studies, which search genetic material sampled from a host for non-host genes. Here, we focus on an important viral family that includes influenza viruses, the Orthomyxoviridae, with over 100 recently discovered viruses infecting hosts from humans to fish. We find that one virus called Wǔhàn mosquito virus 6, discovered in mosquitoes in China, has spread across the globe very recently. Surface proteins used to enter cells show signs of rapid evolution in Wǔhàn mosquito virus 6 and its relatives which suggests an ability to infect vertebrate animals. We compute the rate at which new orthomyxovirus species discovered add evolutionary history to the tree of life, predict that many viruses remain to be discovered, and discuss what appropriately designed future studies can teach us about how diseases cross between continents and species.
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Affiliation(s)
- Gytis Dudas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Vilnius, Lithuania
| | - Joshua Batson
- Chan Zuckerberg Biohub, San Francisco, California, USA
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5
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Scheibner D, Salaheldin AH, Bagato O, Zaeck LM, Mostafa A, Blohm U, Müller C, Eweas AF, Franzke K, Karger A, Schäfer A, Gischke M, Hoffmann D, Lerolle S, Li X, Abd El-Hamid HS, Veits J, Breithaupt A, Boons GJ, Matrosovich M, Finke S, Pleschka S, Mettenleiter TC, de Vries RP, Abdelwhab EM. Phenotypic effects of mutations observed in the neuraminidase of human origin H5N1 influenza A viruses. PLoS Pathog 2023; 19:e1011135. [PMID: 36745654 PMCID: PMC9934401 DOI: 10.1371/journal.ppat.1011135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 02/16/2023] [Accepted: 01/18/2023] [Indexed: 02/07/2023] Open
Abstract
Global spread and regional endemicity of H5Nx Goose/Guangdong avian influenza viruses (AIV) pose a continuous threat for poultry production and zoonotic, potentially pre-pandemic, transmission to humans. Little is known about the role of mutations in the viral neuraminidase (NA) that accompanied bird-to-human transmission to support AIV infection of mammals. Here, after detailed analysis of the NA sequence of human H5N1 viruses, we studied the role of A46D, L204M, S319F and S430G mutations in virus fitness in vitro and in vivo. Although H5N1 AIV carrying avian- or human-like NAs had similar replication efficiency in avian cells, human-like NA enhanced virus replication in human airway epithelia. The L204M substitution consistently reduced NA activity of H5N1 and nine other influenza viruses carrying NA of groups 1 and 2, indicating a universal effect. Compared to the avian ancestor, human-like H5N1 virus has less NA incorporated in the virion, reduced levels of viral NA RNA replication and NA expression. We also demonstrate increased accumulation of NA at the plasma membrane, reduced virus release and enhanced cell-to-cell spread. Furthermore, NA mutations increased virus binding to human-type receptors. While not affecting high virulence of H5N1 in chickens, the studied NA mutations modulated virulence and replication of H5N1 AIV in mice and to a lesser extent in ferrets. Together, mutations in the NA of human H5N1 viruses play different roles in infection of mammals without affecting virulence or transmission in chickens. These results are important to understand the genetic determinants for replication of AIV in mammals and should assist in the prediction of AIV with zoonotic potential.
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Affiliation(s)
- David Scheibner
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Ahmed H. Salaheldin
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Alexandria University, El-Beheira, Egypt
| | - Ola Bagato
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
- Center of Scientific Excellence for Influenza Viruses, National Research Centre (NRC), Water Pollution Research Department, Dokki, Giza, Egypt
| | - Luca M. Zaeck
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Ahmed Mostafa
- Center of Scientific Excellence for Influenza Viruses, National Research Centre (NRC), Water Pollution Research Department, Dokki, Giza, Egypt
| | - Ulrike Blohm
- Institute of Immunology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Christin Müller
- Institute of Medical Virology, Justus Liebig University Giessen, Giessen, Germany
| | - Ahmed F. Eweas
- Department of Medicinal Chemistry, National Research Center, Dokki, Giza, Egypt; Department of Science, University of Technology and Applied Sciences-Rustaq, Rustaq, Sultanate of Oman
| | - Kati Franzke
- Institute of Infectology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Axel Karger
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Alexander Schäfer
- Institute of Immunology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Marcel Gischke
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Donata Hoffmann
- Institute of Diagnostic Virology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Solène Lerolle
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Xuguang Li
- Centre for Biologics Evaluation, Biologics and Genetic Therapies Directorate, HPFB, Health Canada, Ottawa, ON, Canada; Department of Biochemistry, Microbiology and Immunology and Emerging Pathogens Research Centre, University of Ottawa, Ottawa, Ontario, Canada
| | - Hatem S. Abd El-Hamid
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Damanhur University, Al-Buheira, Egypt
| | - Jutta Veits
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Angele Breithaupt
- Department of Experimental Animal Facilities and Biorisk Management, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Geert-Jan Boons
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Science, the Netherlands
| | | | - Stefan Finke
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Stephan Pleschka
- Institute of Medical Virology, Justus Liebig University Giessen, Giessen, Germany
- German Center for Infection Research (DZIF) partner site Giessen-Marburg-Langen, Germany
| | - Thomas C. Mettenleiter
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
| | - Robert P. de Vries
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Science, the Netherlands
| | - Elsayed M. Abdelwhab
- Institute of Molecular Virology and Cell Biology, Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Greifswald-Insel Riems, Germany
- * E-mail:
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6
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Abstract
RNA viruses include respiratory viruses, such as coronaviruses and influenza viruses, as well as vector-borne viruses, like dengue and West Nile virus. RNA viruses like these encounter various environments when they copy themselves and spread from cell to cell or host to host. Ex vivo differences, such as geographical location and humidity, affect their stability and transmission, while in vivo differences, such as pH and host gene expression, impact viral receptor binding, viral replication, and the host immune response against the viral infection. A critical factor affecting RNA viruses both ex vivo and in vivo, and defining the outcome of viral infections and the direction of viral evolution, is temperature. In this minireview, we discuss the impact of temperature on viral replication, stability, transmission, and adaptation, as well as the host innate immune response. Improving our understanding of how RNA viruses function, survive, and spread at different temperatures will improve our models of viral replication and transmission risk analyses.
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Affiliation(s)
- Karishma Bisht
- Department of Molecular Biology, Princeton University, Princeton, New Jersey, USA
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7
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Structural and inhibitor sensitivity analysis of influenza B-like viral neuraminidases derived from Asiatic toad and spiny eel. Proc Natl Acad Sci U S A 2022; 119:e2210724119. [PMID: 36191180 PMCID: PMC9586306 DOI: 10.1073/pnas.2210724119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Influenza virus neuraminidase (NA) is an important target for antiviral development because it plays a crucial role in releasing newly assembled viruses. Two unique influenza-like virus genomes were recently reported in the Wuhan Asiatic toad and Wuhan spiny eel. Their NA genes appear to be highly divergent from all known influenza NAs, raising key questions as to whether the Asiatic toad influenza-like virus NA (tNA) and spiny eel NA (eNA) have canonical NA activities and structures and whether they show sensitivity to NA inhibitors (NAIs). Here, we found that both tNA and eNA have neuraminidase activities. A detailed structural analysis revealed that tNA and eNA present similar overall structures to currently known NAs, with a conserved calcium binding site. Inhibition assays indicated that tNA is resistant to NAIs, while eNA is still sensitive to NAIs. E119 is conserved in canonical NAs. The P119E substitution in tNA can restore sensitivity to NAIs, and, in contrast, the E119P substitution in eNA decreased its sensitivity to NAIs. The structures of NA-inhibitor complexes further provide a detailed insight into NA-inhibitor interactions at the atomic level. Moreover, tNA and eNA have unique N-glycosylation sites compared with canonical NAs. Collectively, the structural features, NA activities, and sensitivities to NAIs suggest that fish- and amphibian-derived influenza-like viruses may circulate in these vertebrates. More attention should be paid to these influenza-like viruses because their NA molecules may play roles in the emergence of NAI resistance.
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8
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Perry BJ, Darestani MM, Ara MG, Hoste A, Jandt JM, Dutoit L, Holmes EC, Ingram T, Geoghegan JL. Viromes of Freshwater Fish with Lacustrine and Diadromous Life Histories Differ in Composition. Viruses 2022; 14:257. [PMID: 35215850 PMCID: PMC8878276 DOI: 10.3390/v14020257] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2021] [Revised: 01/19/2022] [Accepted: 01/25/2022] [Indexed: 12/20/2022] Open
Abstract
Viruses that infect fish are understudied, yet they provide important evolutionary context to the viruses that infect terrestrial vertebrates. We surveyed gill tissue meta-transcriptomes collected from two species of native freshwater fish from Aotearoa New Zealand-Retropinna retropinna and Gobiomorphus cotidianus. A total of 64 fish were used for gill tissue meta-transcriptomic sequencing, from populations with contrasting life histories-landlocked (i.e., lacustrine) and diadromous-on the South Island and Chatham Islands. We observed that both viral richness and taxonomic diversity were significantly associated with life history and host species, with lacustrine R. retropinna characterised by higher viral alpha diversity than diadromous R. retropinna. Additionally, we observed transcripts of fish viruses from 12 vertebrate host-associated virus families, and phylogenetically placed eight novel RNA viruses and three novel DNA viruses in the Astroviridae, Paramyxoviridae, Orthomyxoviridae, Rhabdoviridae, Totiviridae, Poxviridae, Alloherpesviridae, and Adintoviridae in their evolutionary contexts. These results represent an important survey of the viruses that infect two widespread native fish species in New Zealand, and provide insight useful for future fish virus surveys.
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Affiliation(s)
- Benjamin J. Perry
- Department of Microbiology and Immunology, University of Otago, Dunedin 9016, New Zealand;
| | - Mitra Mohamadi Darestani
- Department of Zoology, University of Otago, Dunedin 9016, New Zealand; (M.M.D.); (M.G.A.); (A.H.); (J.M.J.); (L.D.); (T.I.)
| | - Motia Gulshan Ara
- Department of Zoology, University of Otago, Dunedin 9016, New Zealand; (M.M.D.); (M.G.A.); (A.H.); (J.M.J.); (L.D.); (T.I.)
| | - Amélie Hoste
- Department of Zoology, University of Otago, Dunedin 9016, New Zealand; (M.M.D.); (M.G.A.); (A.H.); (J.M.J.); (L.D.); (T.I.)
| | - Jennifer M. Jandt
- Department of Zoology, University of Otago, Dunedin 9016, New Zealand; (M.M.D.); (M.G.A.); (A.H.); (J.M.J.); (L.D.); (T.I.)
| | - Ludovic Dutoit
- Department of Zoology, University of Otago, Dunedin 9016, New Zealand; (M.M.D.); (M.G.A.); (A.H.); (J.M.J.); (L.D.); (T.I.)
| | - Edward C. Holmes
- Sydney Institute for Infectious Diseases, School of Life and Environmental Sciences and School of Medical Sciences, The University of Sydney, Sydney 2006, Australia;
| | - Travis Ingram
- Department of Zoology, University of Otago, Dunedin 9016, New Zealand; (M.M.D.); (M.G.A.); (A.H.); (J.M.J.); (L.D.); (T.I.)
| | - Jemma L. Geoghegan
- Department of Microbiology and Immunology, University of Otago, Dunedin 9016, New Zealand;
- Institute of Environmental Science and Research, Wellington 5022, New Zealand
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