title: [Identification of peptide mimotopes of an abroad-spectrum neutralizing epitope of highly pathogenic avian influenza hemagglutinin].
abstract: A monoclonal antibody (8H5), which showed strong neutralization activity against 33 strains of H5N1 viruses isolated from hosts at various regions from 2002 to 2006, was characterized in our lab recently. This result indicated the presence of highly conserved neutralizing site on hemagglutinin (HA) of various H5N1 subtypes. In the present study, the peptide phage display technique was applied to generate mimotope of the conserved neutralizing epitope recognized by 8H5 mAb. Five peptides displayed on phage were identified to specifically bind to 8H5 mAb. One of the five peptides, 123, was further displayed on the virus-like particle assembled from aa 1-149 fragment of HBcAg. The chimeric particle HBc-T123 conserved the specific binding to 8H5 mAb, and competed with H5N1 viruses for 8H5 mAb. The antiserum induced by HBc-T123 intensively stained on SF21 cells infected by recombinant baculovirus containing HA gene of YU22 virus, indicating the production of cross-reactive antibody to H5N1 HA.
authors.affiliation: National Institute of Diagnostics and Vaccine Development in Infectious Diseases and School of Life Sciences, Xiamen University, Xiamen 361005, China.
authors.forename: Hui-Juan
authors.initials: HJ
authors.lastname: Song
authors.forename: Wen-Xin
authors.initials: WX
authors.lastname: Luo
authors.forename: Zhen-Hua
authors.initials: ZH
authors.lastname: Zheng
authors.forename: Ying-Wei
authors.initials: YW
authors.lastname: Chen
authors.forename: Yi-Xin
authors.initials: YX
authors.lastname: Chen
authors.forename: Zi-Min
authors.initials: ZM
authors.lastname: Chen
authors.forename: Jun
authors.initials: J
authors.lastname: Zhang
authors.forename: Ning-Shao
authors.initials: NS
authors.lastname: Xia
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D000939:Epitopes / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D019267:Hemagglutinin Glycoproteins, Influenza Virus / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D006801:Humans; D053124:Influenza A Virus, H5N1 Subtype / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D007251:Influenza, Human / Q000821:virology*; D051379:Mice; D008807:Mice, Inbred BALB C; D008969:Molecular Sequence Data; D019151:Peptide Library
chemical_list: D000911:Antibodies, Monoclonal; D000939:Epitopes; D019267:Hemagglutinin Glycoproteins, Influenza Virus; D019151:Peptide Library; C109963:hemagglutinin, avian influenza A virus