RESUMEN
Influenza viruses remain a constant global threat with significant health and socioeconomic impact every year and have the potential to cause devastating pandemics [...].
Asunto(s)
Gripe Aviar/virología , Gripe Humana/virología , Orthomyxoviridae/fisiología , Animales , Anticuerpos Antivirales/inmunología , Aves , Humanos , Inmunidad , Vacunas contra la Influenza/administración & dosificación , Vacunas contra la Influenza/genética , Vacunas contra la Influenza/inmunología , Gripe Aviar/genética , Gripe Aviar/inmunología , Gripe Aviar/prevención & control , Gripe Humana/genética , Gripe Humana/inmunología , Gripe Humana/prevención & control , Orthomyxoviridae/genética , VacunaciónRESUMEN
Highly pathogenic avian influenza viruses (HPAIVs) pose a significant threat to human health, with high mortality rates, and require effective vaccines. We showed that, harnessed with novel RNA-mediated chaperone function, hemagglutinin (HA) of H5N1 HPAIV could be displayed as an immunologically relevant conformation on self-assembled chimeric nanoparticles (cNP). A tri-partite monomeric antigen was designed including: i) an RNA-interaction domain (RID) as a docking tag for RNA to enable chaperna function (chaperna: chaperone + RNA), ii) globular head domain (gd) of HA as a target antigen, and iii) ferritin as a scaffold for 24 mer-assembly. The immunization of mice with the nanoparticles (~46 nm) induced a 25-30 fold higher neutralizing capacity of the antibody and provided cross-protection from homologous and heterologous lethal challenges. This study suggests that cNP assembly is conducive to eliciting antibodies against the conserved region in HA, providing potent and broad protective efficacy.