Radvak P, Kosikova M, Kuo YC, Li X, Garner R, Schm. Highly pathogenic avian influenza A/Guangdong/17SF003/2016 is immunogenic and induces cross-protection against antigenically divergent H7N9 viruses. NPJ Vaccines. 2021 Feb 26;6(1):30
Avian influenza A(H7N9) epidemics have a fatality rate of approximately 40%. Previous studies reported that low pathogenic avian influenza (LPAI)-derived candidate vaccine viruses (CVVs) are poorly immunogenic. Here, we assess the immunogenicity and efficacy of a highly pathogenic avian influenza (HPAI) A/Guangdong/17SF003/2016 (GD/16)-extracted hemagglutinin (eHA) vaccine. GD/16 eHA induces robust H7-specific antibody responses in mice with a marked adjuvant antigen-sparing effect. Mice immunized with adjuvanted GD/16 eHA are protected from the lethal LPAI and HPAI H7N9 challenges, in stark contrast to low antibody titers and high mortality in mice receiving adjuvanted LPAI H7 eHAs. The protection correlates well with the magnitude of the H7-specific antibody response (IgG and microneutralization) or HA group 2 stem-specific IgG. Inclusion of adjuvanted GD/16 eHA in heterologous prime-boost improves the immunogenicity and protection of LPAI H7 HAs in mice. Our findings support the inclusion of GD/16-derived CVV in the pandemic preparedness vaccine stockpile.
See Also:
Latest articles in those days:
- Phylogeography and gene pool analysis of highly pathogenic avian influenza H5N1 viruses reported in India from 2006 to 2021 5 hours ago
- Analysis of a diffusive epidemic model with a zero-infection zone 6 hours ago
- Quick detection of H5N1 avian influenza virus by surface enhanced Raman scattering(SERS) using aptamer capture 6 hours ago
- The critical role of RAGE in severe influenza infection: A target for control of inflammatory response in the disease 7 hours ago
- Human infection caused by avian influenza A (H10N5) virus 7 hours ago
[Go Top] [Close Window]