ArticleViruses2023
Key Amino Acid Residues That Determine the Antigenic Properties of Highly Pathogenic H5 Influenza Viruses Bearing the Clade 2.3.4.4 Hemagglutinin Gene.
Article in Viruses, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 11 citations in OpenAlex.
- Distinct infectivity, pathogenicity, and adaptive evolution of clade 2.3.4.4 H5N2 avian influenza viruses in chickens in Taiwan.Poultry science · 2026Article
- MF59-adjuvanted A/Astrakhan influenza vaccine induces cross-neutralizing H5N1 antibodies in ferrets against circulating clade 2.3.4.4b viruses.NPJ vaccines · 2026Article
- Efficacy and Limitations of an Improved Vaccine Derived from an Updated Vaccine Strain Against H5 High Pathogenicity Avian Influenza.Vaccines · 2026Article
- Genomic and evolutionary characterization of newly emerged highly pathogenic avian influenza H5N1 clade (2023-2025).Veterinary world · 2025Article
- Genetic Diversity of Highly Pathogenic Avian Influenza Viruses Isolated in Hokkaido, Japan, During Winter 2024-2025.Pathogens (Basel, Switzerland) · 2025Article
- Assessment of Cross-Reactive Neutralizing Antibodies Induction Against H5N1 Clade 2.3.4.4b by Prior Seasonal Influenza Immunization in Retail Workers.Open forum infectious diseases · 2025Article
- Association of poultry vaccination with interspecies transmission and molecular evolution of H5 subtype avian influenza virus.Science advances · 2025Article
- On-Site and Visual Detection of the H5 Subtype Avian Influenza Virus Based on RT-RPA and CRISPR/Cas12a.Viruses · 2024Article
Corrections and comments
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Authors and funding
11 authors at 2 institutions in 1 country.
Funding
Abstract
The H5 subtype highly pathogenic avian influenza viruses bearing the clade 2.3.4.4 HA gene have been pervasive among domestic poultry and wild birds worldwide since 2014, presenting substantial risks to human and animal health. Continued circulation of clade 2.3.4.4 viruses has resulted in the emergence of eight subclades (2.3.4.4a-h) and multiple distinct antigenic groups. However, the key antigenic substitutions responsible for the antigenic change of these viruses remain unknown. In this study, we analyzed the HA gene sequences of 5713 clade 2.3.4.4 viruses obtained from a public database and found that 23 amino acid residues were highly variable among these strains. We then generated a series of single-amino-acid mutants based on the H5-Re8 (a vaccine seed virus) background and tested their reactivity with a panel of eight monoclonal antibodies (mAbs). Six mutants bearing amino acid substitutions at positions 120, 126, 141, 156, 185, or 189 (H5 numbering) led to reduced or lost reactivity to these mAbs. Further antigenic cartography analysis revealed that the amino acid residues at positions 126, 156, and 189 acted as immunodominant epitopes of H5 viruses. Collectively, our findings offer valuable guidance for the surveillance and early detection of emerging antigenic variants.
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