ArticleThe Journal of general virology2017
Effects of PB1-F2 on the pathogenicity of H1N1 swine influenza virus in mice and pigs.
Article in The Journal of general virology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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Who cites it
10 citing papers in PubMed, 12 citations in OpenAlex.
- Computational Insights into PB1-F2 Mediated Modulation of VDAC1: An Allosteric Mechanism in Mitochondrial Dysfunction.ACS omega · 2026Article
- Genetic Characterization and Pathogenicity of a Triple-Reassortant H1N1 Swine Influenza Virus Isolated in Guangdong.Transboundary and emerging diseases · 2026Article
- Pigs are highly susceptible to but do not transmit mink-derived highly pathogenic avian influenza virus H5N1 clade 2.3.4.4b.Emerging microbes & infections · 2024Article
- Article
- A quantitative approach to assess influenza A virus fitness and transmission in guinea pigs.Journal of virology · 2021Article
- Bat influenza vectored NS1-truncated live vaccine protects pigs against heterologous virus challenge.Vaccine · 2021Article
- Roles of the Non-Structural Proteins of Influenza A Virus.Pathogens (Basel, Switzerland) · 2020Review
- A Single Amino Acid at Position 431 of the PB2 Protein Determines the Virulence of H1N1 Swine Influenza Viruses in Mice.Journal of virology · 2020Article
- Comparison of Pathogenicity and Transmissibility of Influenza B and D Viruses in Pigs.Viruses · 2019Article
- Evolution and Virulence of Influenza A Virus Protein PB1-F2.International journal of molecular sciences · 2017Review
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Authors and funding
14 authors at 2 institutions in 2 countries.
Funding
Abstract
Although several studies have exploited the effects of PB1-F2 in swine influenza viruses, its contribution to the pathogenicity of swine influenza viruses remains unclear. Herein, we investigated the effects of PB1-F2 on the pathogenicity of influenza virus using a virulent H1N1 A/swine/Kansas/77778/2007 (KS07) virus, which expresses a full-length PB1-F2, in mice and pigs. Using reverse genetics, we generated the wild-type KS07 (KS07_WT), a PB1-F2 knockout mutant (KS07_K/O) and its N66S variant (KS07_N66S). KS07_K/O showed similar pathogenicity in mice to the KS07_WT, whereas KS07_N66S displayed enhanced virulence when compared to the other two viruses. KS07_WT exhibited more efficient replication in lungs and nasal shedding in infected pigs than the other two viruses. Pigs infected with the KS07_WT had higher pulmonary levels of granulocyte-macrophage colony-stimulating factor, IFN-γ, IL-6 and IL-8 at 3 and 5 days post-infection, as well as lower levels of IL-2, IL-4 and IL-12 at 1 day post-infection compared to those infected with the KS07_K/O. These results indicate that PB1-F2 modulates KS07 H1N1 virus replication, pathogenicity and innate immune responses in pigs and the single substitution at position 66 (N/S) in the PB1-F2 plays a critical role in virulence in mice. Taken together, our results provide new insights into the effects of PB1-F2 on the virulence of influenza virus in swine and support PB1-F2 as a virulence factor of influenza A virus in a strain- and host-dependent manner.
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