title: Comparative immunogenicity of recombinant adenovirus-vectored vaccines expressing different forms of hemagglutinin (HA) proteins from the H5 serotype of influenza A viruses in mice.
abstract: Recent outbreaks of highly pathogenic avian influenza (HPAI) H5N1 viruses in poultry and their subsequent transmission to humans have highlighted an urgent need to develop preventive vaccines in the event of a pandemic. In this paper we constructed recombinant adenovirus (rAd)-vectored influenza vaccines expressing different forms of H5 hemagglutinin (HA) from the A/Vietnam/1194/04 (VN/1194/04) virus, a wild-type HA, a sequence codon-optimized HA and a transmembrane (TM) domain-truncated HA. Compared to the rAd vectors expressing the wild-type HA (rAd-04wtHA) and the TM-truncated form of HA (rAd-04optHA-dTM), the rAd vectored vaccine with the sequence codon-optimized HA (rAd-04optHA) showed a tendency to induce much higher hemagglutinin inhibition (HI) antibody titers in mice immunized with a prime-boost vaccine. Furthermore, administration of the rAd-04optHA vaccine to mice could elicit cross-reactive immune responses against the antigenically distinct HK/482/97 virus. Additionally, we constructed another vector containing the codon-optimized HA of the A/Hong Kong/482/97 (HK/482/97) virus. Administration of a bivalent immunization formulation including the rAd-04optHA and rAd-97optHA vaccines to mice induced a stronger immune response against HK/482/97 virus than the monovalent formulation. Taken together, these findings may have some implications for the development of rAd-vectored vaccines in the event of the pandemic spread of HPAI.
authors.affiliation: National Key Laboratory of Respiratory Diseases, Guangzhou Institute of Biomedicine and Health, Chinese Academy of Sciences, #190 Kai Yuan Avenue, Science Park, Guangzhou 510530, China.
authors.forename: Xiangjing
authors.initials: X
authors.lastname: Hu
authors.forename: Weixu
authors.initials: W
authors.lastname: Meng
authors.forename: Zhenyuan
authors.initials: Z
authors.lastname: Dong
authors.forename: Weiqi
authors.initials: W
authors.lastname: Pan
authors.forename: Caijun
authors.initials: C
authors.lastname: Sun
authors.forename: Ling
authors.initials: L
authors.lastname: Chen
mesh_terms: D000256:Adenoviridae / Q000235:genetics*; D000818:Animals; D000914:Antibodies, Viral / Q000097:blood; D003062:Codon; D003429:Cross Reactions; D004337:Drug Carriers; D005260:Female; D005822:Genetic Vectors; D006385:Hemagglutination Inhibition Tests; D019267:Hemagglutinin Glycoproteins, Influenza Virus / Q000235:genetics / Q000276:immunology*; D007117:Immunization, Secondary / Q000379:methods; D009980:Influenza A virus / Q000235:genetics / Q000276:immunology*; D007252:Influenza Vaccines / Q000235:genetics / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D017384:Sequence Deletion
chemical_list: D000914:Antibodies, Viral; D003062:Codon; D004337:Drug Carriers; D019267:Hemagglutinin Glycoproteins, Influenza Virus; D007252:Influenza Vaccines; C109963:hemagglutinin, avian influenza A virus