Reduced accumulation of defective viral genomes contributes to severe outcome in influenza virus infected patients
Influenza A virus (IAV) infection can be severe or even lethal in toddlers, the elderly and patients with certain medical conditions. Infection of apparently healthy individuals nonetheless accounts for many severe disease cases and deaths, suggesting that viruses with increased pathogenicity co-cir...
| Authors: | ; ; ; ; ; ; ; ; ; ; ; ; |
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| Format: | Article |
| Publication date: | 2017 |
| Country: | España |
| Institution: | Instituto de Salud Carlos III (ISCIII) |
| Repository: | Repisalud |
| Language: | English |
| OAI Identifier: | oai:repisalud.isciii.es:20.500.12105/6718 |
| Online Access: | http://hdl.handle.net/20.500.12105/6718 |
| Access Level: | Open access |
| Keyword: | Adolescent Adult Animals Child Child, Preschool Female Genome, Viral Humans Influenza A Virus, H1N1 Subtype Influenza A Virus, H5N1 Subtype Influenza, Human Male Mice Middle Aged Orthomyxoviridae Infections Virulence Virus Replication Young Adult |
| _version_ | 1878742955025498112 |
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| author | Vasilijevic, Jasmina |
| author2 | Zamarreño, Noelia Oliveros, Juan Carlos Rodriguez-Frandsen, Ariel Gómez, Guillermo Rodriguez, Guadalupe Pérez-Ruiz, Mercedes Rey, Sonia Barba, Isabel Pozo Sanchez, Francisco Casas Flecha, Inmaculada Nieto, Amelia Falcon, Ana |
| author2_role | author author author author author author author author author author author author |
| author_browse | Barba, Isabel Casas Flecha, Inmaculada Falcon, Ana Gómez, Guillermo Nieto, Amelia Oliveros, Juan Carlos Pozo Sanchez, Francisco Pérez-Ruiz, Mercedes Rey, Sonia Rodriguez, Guadalupe Rodriguez-Frandsen, Ariel Vasilijevic, Jasmina Zamarreño, Noelia |
| author_facet | Vasilijevic, Jasmina Zamarreño, Noelia Oliveros, Juan Carlos Rodriguez-Frandsen, Ariel Gómez, Guillermo Rodriguez, Guadalupe Pérez-Ruiz, Mercedes Rey, Sonia Barba, Isabel Pozo Sanchez, Francisco Casas Flecha, Inmaculada Nieto, Amelia Falcon, Ana |
| author_role | author |
| collection | Repisalud |
| description | Influenza A virus (IAV) infection can be severe or even lethal in toddlers, the elderly and patients with certain medical conditions. Infection of apparently healthy individuals nonetheless accounts for many severe disease cases and deaths, suggesting that viruses with increased pathogenicity co-circulate with pandemic or epidemic viruses. Looking for potential virulence factors, we have identified a polymerase PA D529N mutation detected in a fatal IAV case, whose introduction into two different recombinant virus backbones, led to reduced defective viral genomes (DVGs) production. This mutation conferred low induction of antiviral response in infected cells and increased pathogenesis in mice. To analyze the association between low DVGs production and pathogenesis in humans, we performed a genomic analysis of viruses isolated from a cohort of previously healthy individuals who suffered highly severe IAV infection requiring admission to Intensive Care Unit and patients with fatal outcome who additionally showed underlying medical conditions. These viruses were compared with those isolated from a cohort of mild IAV patients. Viruses with fewer DVGs accumulation were observed in patients with highly severe/fatal outcome than in those with mild disease, suggesting that low DVGs abundance constitutes a new virulence pathogenic marker in humans. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_ff4a6264a92a19d77e4db34b10e0cb94 |
| institution | Instituto de Salud Carlos III (ISCIII) |
| instname_str | Instituto de Salud Carlos III (ISCIII) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:repisalud.isciii.es:20.500.12105/6718 |
| publishDate | 2017 |
| publishDateSort | 2017 |
| publisher | Public Library of Science (PLOS) |
| publisherStr | Public Library of Science (PLOS) |
| reponame_str | Repisalud |
| spelling | Reduced accumulation of defective viral genomes contributes to severe outcome in influenza virus infected patients Vasilijevic, Jasmina Zamarreño, Noelia Oliveros, Juan Carlos Rodriguez-Frandsen, Ariel Gómez, Guillermo Rodriguez, Guadalupe Pérez-Ruiz, Mercedes Rey, Sonia Barba, Isabel Pozo Sanchez, Francisco Casas Flecha, Inmaculada Nieto, Amelia Falcon, Ana Adolescent Adult Animals Child Child, Preschool Female Genome, Viral Humans Influenza A Virus, H1N1 Subtype Influenza A Virus, H5N1 Subtype Influenza, Human Male Mice Middle Aged Orthomyxoviridae Infections Virulence Virus Replication Young Adult Influenza A virus (IAV) infection can be severe or even lethal in toddlers, the elderly and patients with certain medical conditions. Infection of apparently healthy individuals nonetheless accounts for many severe disease cases and deaths, suggesting that viruses with increased pathogenicity co-circulate with pandemic or epidemic viruses. Looking for potential virulence factors, we have identified a polymerase PA D529N mutation detected in a fatal IAV case, whose introduction into two different recombinant virus backbones, led to reduced defective viral genomes (DVGs) production. This mutation conferred low induction of antiviral response in infected cells and increased pathogenesis in mice. To analyze the association between low DVGs production and pathogenesis in humans, we performed a genomic analysis of viruses isolated from a cohort of previously healthy individuals who suffered highly severe IAV infection requiring admission to Intensive Care Unit and patients with fatal outcome who additionally showed underlying medical conditions. These viruses were compared with those isolated from a cohort of mild IAV patients. Viruses with fewer DVGs accumulation were observed in patients with highly severe/fatal outcome than in those with mild disease, suggesting that low DVGs abundance constitutes a new virulence pathogenic marker in humans. Public Library of Science (PLOS) http://hdl.handle.net/20.500.12105/6718 |
| spellingShingle | Reduced accumulation of defective viral genomes contributes to severe outcome in influenza virus infected patients Vasilijevic, Jasmina Adolescent Adult Animals Child Child, Preschool Female Genome, Viral Humans Influenza A Virus, H1N1 Subtype Influenza A Virus, H5N1 Subtype Influenza, Human Male Mice Middle Aged Orthomyxoviridae Infections Virulence Virus Replication Young Adult |
| title | Reduced accumulation of defective viral genomes contributes to severe outcome in influenza virus infected patients |
| title_full | Reduced accumulation of defective viral genomes contributes to severe outcome in influenza virus infected patients |
| title_fullStr | Reduced accumulation of defective viral genomes contributes to severe outcome in influenza virus infected patients |
| title_full_unstemmed | Reduced accumulation of defective viral genomes contributes to severe outcome in influenza virus infected patients |
| title_short | Reduced accumulation of defective viral genomes contributes to severe outcome in influenza virus infected patients |
| title_sort | Reduced accumulation of defective viral genomes contributes to severe outcome in influenza virus infected patients |
| topic | Adolescent Adult Animals Child Child, Preschool Female Genome, Viral Humans Influenza A Virus, H1N1 Subtype Influenza A Virus, H5N1 Subtype Influenza, Human Male Mice Middle Aged Orthomyxoviridae Infections Virulence Virus Replication Young Adult |
| topic_facet | Adolescent Adult Animals Child Child, Preschool Female Genome, Viral Humans Influenza A Virus, H1N1 Subtype Influenza A Virus, H5N1 Subtype Influenza, Human Male Mice Middle Aged Orthomyxoviridae Infections Virulence Virus Replication Young Adult |
| url | http://hdl.handle.net/20.500.12105/6718 |