title: [The immunogenicity in mice enhanced significantly via prime-boost vaccination with DNA-based or recombinant vaccinia(Tiantan) viral-based H5N1 vaccine candidates containing multi-structural antigens].
abstract: This study aimed to develop an effective experimental vaccine against highly pathogenic H5N1 Avian Influenza (HPAI) virus and to optimize their immunization programs. As reported previously, various DNA-based or recombinant vaccinia viral(Tiantan)-based H5N1 vaccine candidates, which containing a single cistronic construct (HAop, or NAop) or a bicistronic construct (HAop/M2 or NAop/M1) of H5N1 influenza virus (Anhui strain) were constructed and characterized in our lab. In this study, we further analysed the immunogenicity in mice of these vaccine candidates by various protocols (single or combined immunization). Our results showed that: comparing with immunization with DNA-based or rTTV-based H5N1 vaccine only, combined DNA-based with rTTV-based H5N1 vaccine immunization via prime-boost strategy enhanced immune response significantly against multi-H5N1 antigens detected by hemagglutination inhibition (HI) assay, NA- or M1- or M2-specific antibody detection, and micro-neutralizing antibody test and IFN-gamma ELISpot assay. Priming with DNA-based vaccine induced higher level of humoral response against HA or NA antigen than priming with rTTV-based vaccine; In contract, M1 and M2-specific antibody levels were higher among that of priming with rTTV -based vaccine. These findings provide a basis for further development of novel H5N1 vaccines and for the optimization of the immunization programs of combined multi-antigens vaccine candidates.
authors.affiliation: State Key Laboratory for Molecular Virology and Genetic Engineering, National Institute for Viral Disease Control and Prevention, China CDC, Beijing 100052, China.
authors.forename: Wen
authors.initials: W
authors.lastname: Wang
authors.forename: Hong
authors.initials: H
authors.lastname: Chen
authors.forename: Yao
authors.initials: Y
authors.lastname: Deng
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Xiao
authors.initials: X
authors.lastname: Yin
authors.forename: Min
authors.initials: M
authors.lastname: Wang
authors.forename: Jian-Fang
authors.initials: JF
authors.lastname: Zhou
authors.forename: Yue-Ling
authors.initials: YL
authors.lastname: Shu
authors.forename: Li
authors.initials: L
authors.lastname: Ruan
authors.forename: Wen-Jie
authors.initials: WJ
authors.lastname: Tan
mesh_terms: D000818:Animals; D000956:Antigens, Viral / Q000235:genetics / Q000276:immunology*; D005260:Female; D007114:Immunization / Q000379:methods; D053124:Influenza A Virus, H5N1 Subtype / Q000235:genetics / Q000276:immunology*; D007252:Influenza Vaccines / Q000235:genetics / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D014611:Vaccination / Q000379:methods; D019444:Vaccines, DNA / Q000235:genetics / Q000276:immunology*; D014614:Vaccines, Synthetic / Q000235:genetics / Q000276:immunology; D014615:Vaccinia / Q000235:genetics / Q000276:immunology
chemical_list: D000956:Antigens, Viral; D007252:Influenza Vaccines; D019444:Vaccines, DNA; D014614:Vaccines, Synthetic