Equine influenza virus in Asia: phylogeographic pattern and molecular features reveal circulation of an autochthonous lineage
Equine influenza virus (EIV) causes severe acute respiratory disease in horses. Currently, the strains belonging to the H3N8 subtype are divided into two clades, Florida clade 1 (FC1) and Florida clade 2 (FC2), which emerged in 2002. Both FC1 and FC2 clades were reported in Asian and Middle East cou...
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| Format: | info:ar-repo/semantics/artículo |
| Language: | Inglés |
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American Society for Microbiology
2020
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| Online Access: | http://hdl.handle.net/20.500.12123/6711 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6580976/ https://doi.org/10 .1128/JVI.00116-19. |
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| author | Miño, Samuel Mojsiejczuk, Laura Guo, Wei Zhang, Haili Qi, Ting Du, Cheng Zhang, Xiang Wang, Jingfei Campos, Rodolfo Wang, Xiaojun |
| author_browse | Campos, Rodolfo Du, Cheng Guo, Wei Miño, Samuel Mojsiejczuk, Laura Qi, Ting Wang, Jingfei Wang, Xiaojun Zhang, Haili Zhang, Xiang |
| author_facet | Miño, Samuel Mojsiejczuk, Laura Guo, Wei Zhang, Haili Qi, Ting Du, Cheng Zhang, Xiang Wang, Jingfei Campos, Rodolfo Wang, Xiaojun |
| author_sort | Miño, Samuel |
| collection | INTA Digital |
| description | Equine influenza virus (EIV) causes severe acute respiratory disease in horses. Currently, the strains belonging to the H3N8 subtype are divided into two clades, Florida clade 1 (FC1) and Florida clade 2 (FC2), which emerged in 2002. Both FC1 and FC2 clades were reported in Asian and Middle East countries in the last decade. In this study, we described the evolution, epidemiology, and molecular characteristic of the EIV lineages, with focus on those detected in Asia from 2007 to 2017. The full genome phylogeny showed that FC1 and FC2 constituted separate and divergent lineages, without evidence of reassortment between the clades. While FC1 evolved as a single lineage, FC2 showed a divergent event around 2004 giving rise to two well-supported and coexisting sublineages, European and Asian. Furthermore, two different spread patterns of EIV in Asian countries were identified. The FC1 outbreaks were caused by independent introductions of EIV from the Americas, with the Asian isolates genetically similar to the contemporary American lineages. On the other hand, the FC2 strains detected in Asian mainland countries conformed to an autochthonous monophyletic group with a common ancestor dated in 2006 and showed evidence of an endemic circulation in a local host. Characteristic aminoacidic signature patterns were detected in all viral proteins in both Asian-FC1 and FC2 populations. Several changes were located at the top of the HA1 protein, inside or near antigenic sites. Further studies are needed to assess the potential impact of these antigenic changes in vaccination programs.
IMPORTANCE The complex and continuous antigenic evolution of equine influenza viruses (EIVs) remains a major hurdle for vaccine development and the design of effective immunization programs. The present study provides a comprehensive analysis showing the EIV evolutionary dynamics, including the spread and circulation within the Asian continent and its relationship to global EIV populations over a 10-year period. Moreover, we provide a better understanding of EIV molecular evolution in Asian countries and its consequences on the antigenicity. The study underscores the association between the global horse movement and the circulation of EIV in this region. Understanding EIV evolution is imperative in order to mitigate the risk of outbreaks affecting the horse industry and to help with the selection of the viral strains to be included in the formulation of future vaccines. |
| format | info:ar-repo/semantics/artículo |
| id | INTA6711 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | American Society for Microbiology |
| publisherStr | American Society for Microbiology |
| record_format | dspace |
| spelling | INTA67112020-02-10T16:04:28Z Equine influenza virus in Asia: phylogeographic pattern and molecular features reveal circulation of an autochthonous lineage Miño, Samuel Mojsiejczuk, Laura Guo, Wei Zhang, Haili Qi, Ting Du, Cheng Zhang, Xiang Wang, Jingfei Campos, Rodolfo Wang, Xiaojun Equine Influenzavirus Evolution Vaccines Phylogeny Virus de la Influenza Equina Evolución Influenzavirus Vacuna Asia Filogenia Equine influenza virus (EIV) causes severe acute respiratory disease in horses. Currently, the strains belonging to the H3N8 subtype are divided into two clades, Florida clade 1 (FC1) and Florida clade 2 (FC2), which emerged in 2002. Both FC1 and FC2 clades were reported in Asian and Middle East countries in the last decade. In this study, we described the evolution, epidemiology, and molecular characteristic of the EIV lineages, with focus on those detected in Asia from 2007 to 2017. The full genome phylogeny showed that FC1 and FC2 constituted separate and divergent lineages, without evidence of reassortment between the clades. While FC1 evolved as a single lineage, FC2 showed a divergent event around 2004 giving rise to two well-supported and coexisting sublineages, European and Asian. Furthermore, two different spread patterns of EIV in Asian countries were identified. The FC1 outbreaks were caused by independent introductions of EIV from the Americas, with the Asian isolates genetically similar to the contemporary American lineages. On the other hand, the FC2 strains detected in Asian mainland countries conformed to an autochthonous monophyletic group with a common ancestor dated in 2006 and showed evidence of an endemic circulation in a local host. Characteristic aminoacidic signature patterns were detected in all viral proteins in both Asian-FC1 and FC2 populations. Several changes were located at the top of the HA1 protein, inside or near antigenic sites. Further studies are needed to assess the potential impact of these antigenic changes in vaccination programs. IMPORTANCE The complex and continuous antigenic evolution of equine influenza viruses (EIVs) remains a major hurdle for vaccine development and the design of effective immunization programs. The present study provides a comprehensive analysis showing the EIV evolutionary dynamics, including the spread and circulation within the Asian continent and its relationship to global EIV populations over a 10-year period. Moreover, we provide a better understanding of EIV molecular evolution in Asian countries and its consequences on the antigenicity. The study underscores the association between the global horse movement and the circulation of EIV in this region. Understanding EIV evolution is imperative in order to mitigate the risk of outbreaks affecting the horse industry and to help with the selection of the viral strains to be included in the formulation of future vaccines. Instituto de Virología Fil: Miño, Samuel. Chinese Academy of Agricultural Sciences. Harbin Veterinary Research Institute. National Key Laboratory of Veterinary Biotechnology; China. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Virología; Argentina Fil: Mojsiejczuk, Laura. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Microbiología, Inmunología, Biotecnología y Genética. Cátedra de Virología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Guo, Wei. Chinese Academy of Agricultural Sciences. Harbin Veterinary Research Institute. National Key Laboratory of Veterinary Biotechnology; China Fil: Zhang, Haili. Chinese Academy of Agricultural Sciences. Harbin Veterinary Research Institute. National Key Laboratory of Veterinary Biotechnology; China Fil: Qi, Ting. Chinese Academy of Agricultural Sciences. Harbin Veterinary Research Institute. National Key Laboratory of Veterinary Biotechnology; China Fil: Du, Cheng. Chinese Academy of Agricultural Sciences. Harbin Veterinary Research Institute. National Key Laboratory of Veterinary Biotechnology; China Fil: Zhang, Xiang. Chinese Academy of Agricultural Sciences. Harbin Veterinary Research Institute. National Key Laboratory of Veterinary Biotechnology; China Fil: Wang, Jingfei. Chinese Academy of Agricultural Sciences. Harbin Veterinary Research Institute. National Key Laboratory of Veterinary Biotechnology; China Fil: Campos, Rodolfo. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Microbiología, Inmunología, Biotecnología y Genética. Cátedra de Virología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Wang, Xiaojun. Chinese Academy of Agricultural Sciences. Harbin Veterinary Research Institute. National Key Laboratory of Veterinary Biotechnology; China 2020-02-10T15:59:23Z 2020-02-10T15:59:23Z 2019-07 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/6711 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6580976/ 0022-538X https://doi.org/10 .1128/JVI.00116-19. eng info:eu-repo/semantics/restrictedAccess application/pdf American Society for Microbiology Journal of virology 93 (13) : e00116-19. (Julio 2019) |
| spellingShingle | Equine Influenzavirus Evolution Vaccines Phylogeny Virus de la Influenza Equina Evolución Influenzavirus Vacuna Asia Filogenia Miño, Samuel Mojsiejczuk, Laura Guo, Wei Zhang, Haili Qi, Ting Du, Cheng Zhang, Xiang Wang, Jingfei Campos, Rodolfo Wang, Xiaojun Equine influenza virus in Asia: phylogeographic pattern and molecular features reveal circulation of an autochthonous lineage |
| title | Equine influenza virus in Asia: phylogeographic pattern and molecular features reveal circulation of an autochthonous lineage |
| title_full | Equine influenza virus in Asia: phylogeographic pattern and molecular features reveal circulation of an autochthonous lineage |
| title_fullStr | Equine influenza virus in Asia: phylogeographic pattern and molecular features reveal circulation of an autochthonous lineage |
| title_full_unstemmed | Equine influenza virus in Asia: phylogeographic pattern and molecular features reveal circulation of an autochthonous lineage |
| title_short | Equine influenza virus in Asia: phylogeographic pattern and molecular features reveal circulation of an autochthonous lineage |
| title_sort | equine influenza virus in asia phylogeographic pattern and molecular features reveal circulation of an autochthonous lineage |
| topic | Equine Influenzavirus Evolution Vaccines Phylogeny Virus de la Influenza Equina Evolución Influenzavirus Vacuna Asia Filogenia |
| url | http://hdl.handle.net/20.500.12123/6711 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6580976/ https://doi.org/10 .1128/JVI.00116-19. |
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