3
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Genetic and biological properties of H7N9 avian influenza viruses detected after application of the H7N9 poultry vaccine in China

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The H7N9 avian influenza virus (AIV) that emerged in China have caused five waves of human infection. Further human cases have been successfully prevented since September 2017 through the use of an H7N9 vaccine in poultry. However, the H7N9 AIV has not been eradicated from poultry in China, and its evolution remains largely unexplored. In this study, we isolated 19 H7N9 AIVs during surveillance and diagnosis from February 2018 to December 2019, and genetic analysis showed that these viruses have formed two different genotypes. Animal studies indicated that the H7N9 viruses are highly lethal to chicken, cause mild infection in ducks, but have distinct pathotypes in mice. The viruses bound to avian-type receptors with high affinity, but gradually lost their ability to bind to human-type receptors. Importantly, we found that H7N9 AIVs isolated in 2019 were antigenically different from the H7N9 vaccine strain that was used for H7N9 influenza control in poultry, and that replication of these viruses cannot, therefore, be completely prevented in vaccinated chickens. We further revealed that two amino acid mutations at positions 135 and 160 in the HA protein added two glycosylation sites and facilitated the escape of the H7N9 viruses from the vaccine-induced immunity. Our study provides important insights into H7N9 virus evolution and control.

          Author summary

          Human infection with H7N9 virus has been successfully prevented since the application of an H7N9 vaccine in poultry in September 2017 in China; however, the H7N9 virus has not been eradicated from poultry. In this study, we evaluated the genetic and biologic properties of H7N9 viruses detected in poultry in China from February 2018 to December 2019. We found that the H7N9 viruses gradually lost their binding to human-type receptors and were antigenically different from the H7N9 vaccine strain that was used in China for H7N9 influenza control in poultry. We further uncovered the genetic changes that facilitate the escape of the H7N9 viruses from vaccine-induced immunity. Our study provides important insights into H7N9 virus evolution and control.

          Related collections

          Most cited references38

          • Record: found
          • Abstract: found
          • Article: found
          Is Open Access

          SWISS-MODEL: homology modelling of protein structures and complexes

          Abstract Homology modelling has matured into an important technique in structural biology, significantly contributing to narrowing the gap between known protein sequences and experimentally determined structures. Fully automated workflows and servers simplify and streamline the homology modelling process, also allowing users without a specific computational expertise to generate reliable protein models and have easy access to modelling results, their visualization and interpretation. Here, we present an update to the SWISS-MODEL server, which pioneered the field of automated modelling 25 years ago and been continuously further developed. Recently, its functionality has been extended to the modelling of homo- and heteromeric complexes. Starting from the amino acid sequences of the interacting proteins, both the stoichiometry and the overall structure of the complex are inferred by homology modelling. Other major improvements include the implementation of a new modelling engine, ProMod3 and the introduction a new local model quality estimation method, QMEANDisCo. SWISS-MODEL is freely available at https://swissmodel.expasy.org.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: found
            Is Open Access

            The SWISS-MODEL Repository—new features and functionality

            SWISS-MODEL Repository (SMR) is a database of annotated 3D protein structure models generated by the automated SWISS-MODEL homology modeling pipeline. It currently holds >400 000 high quality models covering almost 20% of Swiss-Prot/UniProtKB entries. In this manuscript, we provide an update of features and functionalities which have been implemented recently. We address improvements in target coverage, model quality estimates, functional annotations and improved in-page visualization. We also introduce a new update concept which includes regular updates of an expanded set of core organism models and UniProtKB-based targets, complemented by user-driven on-demand update of individual models. With the new release of the modeling pipeline, SMR has implemented a REST-API and adopted an open licencing model for accessing model coordinates, thus enabling bulk download for groups of targets fostering re-use of models in other contexts. SMR can be accessed at https://swissmodel.expasy.org/repository.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Mapping the antigenic and genetic evolution of influenza virus.

              D Smith (2004)
              The antigenic evolution of influenza A (H3N2) virus was quantified and visualized from its introduction into humans in 1968 to 2003. Although there was remarkable correspondence between antigenic and genetic evolution, significant differences were observed: Antigenic evolution was more punctuated than genetic evolution, and genetic change sometimes had a disproportionately large antigenic effect. The method readily allows monitoring of antigenic differences among vaccine and circulating strains and thus estimation of the effects of vaccination. Further, this approach offers a route to predicting the relative success of emerging strains, which could be achieved by quantifying the combined effects of population level immune escape and viral fitness on strain evolution.
                Bookmark

                Author and article information

                Contributors
                Role: InvestigationRole: Methodology
                Role: Funding acquisitionRole: InvestigationRole: MethodologyRole: Validation
                Role: Formal analysisRole: InvestigationRole: MethodologyRole: Validation
                Role: Investigation
                Role: Investigation
                Role: Investigation
                Role: Investigation
                Role: Investigation
                Role: Investigation
                Role: Investigation
                Role: Investigation
                Role: Resources
                Role: Funding acquisitionRole: Investigation
                Role: Funding acquisitionRole: Investigation
                Role: Funding acquisitionRole: Investigation
                Role: Investigation
                Role: Resources
                Role: Investigation
                Role: Investigation
                Role: ConceptualizationRole: Formal analysisRole: InvestigationRole: MethodologyRole: ValidationRole: Writing – original draft
                Role: ConceptualizationRole: Formal analysisRole: Funding acquisitionRole: MethodologyRole: Project administrationRole: SupervisionRole: ValidationRole: Writing – original draftRole: Writing – review & editing
                Role: Editor
                Journal
                PLoS Pathog
                PLoS Pathog
                plos
                plospath
                PLoS Pathogens
                Public Library of Science (San Francisco, CA USA )
                1553-7366
                1553-7374
                27 April 2021
                April 2021
                : 17
                : 4
                : e1009561
                Affiliations
                [1 ] State Key Laboratory of Veterinary Biotechnology, Harbin Veterinary Research Institute, CAAS, Harbin, People’s Republic of China
                [2 ] College of Life and Health Sciences, Chubu University, Aichi, Japan
                University of Texas Medical Branch / Galveston National Laboratory, UNITED STATES
                Author notes

                The authors have declared that no competing interests exist.

                Author information
                https://orcid.org/0000-0003-3518-5642
                https://orcid.org/0000-0001-8460-8619
                https://orcid.org/0000-0003-4580-9455
                https://orcid.org/0000-0001-8910-898X
                Article
                PPATHOGENS-D-21-00387
                10.1371/journal.ppat.1009561
                8104392
                33905456
                441486ac-95f2-49db-a966-cf85759ef395
                © 2021 Yin et al

                This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 19 February 2021
                : 14 April 2021
                Page count
                Figures: 6, Tables: 2, Pages: 19
                Funding
                Funded by: The National Key R&D Program of China
                Award ID: 2016YFD0500201
                Award Recipient :
                Funded by: The National Key R&D Program of China
                Award ID: 2016YFD0500203
                Award Recipient :
                Funded by: The National Natural Science Foundation of China
                Award ID: 31521005
                Award Recipient :
                Funded by: The China Agriculture Research System
                Award ID: CARS-41-G12
                Award Recipient :
                Funded by: The Central Public-interest Scientific Institution Basal Research Fund
                Award ID: NO.1610302017001
                Award Recipient :
                Funded by: Natural Science Foundation of Heilongjiang Province of China
                Award ID: ZD2018007
                Award Recipient :
                This work was supported by the National Key R&D Program of China (2016YFD0500201(GD), 2016YFD0500203(HC)), the National Natural Science Foundation of China (31521005) (HC), the China Agriculture Research System (CARS-41-G12) (GT), the Central Public-interest Scientific Institution Basal Research Fund (NO.1610302017001) (YC), and Natural Science Foundation of Heilongjiang Province of China (ZD2018007) (YL). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
                Categories
                Research Article
                Biology and life sciences
                Organisms
                Viruses
                RNA viruses
                Orthomyxoviruses
                Influenza viruses
                Influenza A virus
                H7N9
                Biology and life sciences
                Microbiology
                Medical microbiology
                Microbial pathogens
                Viral pathogens
                Orthomyxoviruses
                Influenza viruses
                Influenza A virus
                H7N9
                Medicine and health sciences
                Pathology and laboratory medicine
                Pathogens
                Microbial pathogens
                Viral pathogens
                Orthomyxoviruses
                Influenza viruses
                Influenza A virus
                H7N9
                Biology and life sciences
                Organisms
                Viruses
                Viral pathogens
                Orthomyxoviruses
                Influenza viruses
                Influenza A virus
                H7N9
                Biology and Life Sciences
                Organisms
                Eukaryota
                Animals
                Vertebrates
                Amniotes
                Birds
                Fowl
                Gamefowl
                Chickens
                Biology and Life Sciences
                Zoology
                Animals
                Vertebrates
                Amniotes
                Birds
                Fowl
                Gamefowl
                Chickens
                Biology and Life Sciences
                Organisms
                Eukaryota
                Animals
                Vertebrates
                Amniotes
                Birds
                Poultry
                Chickens
                Biology and Life Sciences
                Zoology
                Animals
                Vertebrates
                Amniotes
                Birds
                Poultry
                Chickens
                Medicine and Health Sciences
                Medical Conditions
                Infectious Diseases
                Infectious Disease Control
                Vaccines
                Viral Vaccines
                Biology and Life Sciences
                Microbiology
                Virology
                Viral Vaccines
                Biology and Life Sciences
                Organisms
                Eukaryota
                Animals
                Vertebrates
                Amniotes
                Birds
                Poultry
                Ducks
                Biology and Life Sciences
                Zoology
                Animals
                Vertebrates
                Amniotes
                Birds
                Poultry
                Ducks
                Biology and Life Sciences
                Organisms
                Eukaryota
                Animals
                Vertebrates
                Amniotes
                Birds
                Fowl
                Waterfowl
                Ducks
                Biology and Life Sciences
                Zoology
                Animals
                Vertebrates
                Amniotes
                Birds
                Fowl
                Waterfowl
                Ducks
                Biology and Life Sciences
                Microbiology
                Medical Microbiology
                Microbial Pathogens
                Viral Pathogens
                Medicine and Health Sciences
                Pathology and Laboratory Medicine
                Pathogens
                Microbial Pathogens
                Viral Pathogens
                Biology and Life Sciences
                Organisms
                Viruses
                Viral Pathogens
                Biology and Life Sciences
                Organisms
                Eukaryota
                Animals
                Vertebrates
                Amniotes
                Birds
                Poultry
                Biology and Life Sciences
                Zoology
                Animals
                Vertebrates
                Amniotes
                Birds
                Poultry
                Biology and Life Sciences
                Organisms
                Eukaryota
                Animals
                Vertebrates
                Amniotes
                Birds
                Biology and Life Sciences
                Zoology
                Animals
                Vertebrates
                Amniotes
                Birds
                Biology and Life Sciences
                Physiology
                Immune Physiology
                Antigens
                Biology and Life Sciences
                Immunology
                Immune System Proteins
                Antigens
                Medicine and Health Sciences
                Immunology
                Immune System Proteins
                Antigens
                Biology and Life Sciences
                Biochemistry
                Proteins
                Immune System Proteins
                Antigens
                Custom metadata
                vor-update-to-uncorrected-proof
                2021-05-07
                The sequence data have been deposited in the Global Initiative on Sharing Avian Influenza Data; the accession numbers are EPI1853780~EPI1853931.

                Infectious disease & Microbiology
                Infectious disease & Microbiology

                Comments

                Comment on this article