title: Neutralizing epitopes mapping of human adenovirus type 14 hexon.
abstract: Human adenoviruses 14 (HAdV-14) caused several clusters of acute respiratory disease (ARD) outbreaks in both civilian and military settings. The identification of the neutralizing epitopes of HAdV-14 is important for the surveillance and control of infection. Since the previous studies had indicated that the adenoviruses neutralizing epitopes were likely to be exposed on the surface of the hexon, four epitope peptides, A14R1 (residues 141-157), A14R2 (residues 181-189), A14R4 (residues 252-260) and A14R7 (residues 430-442) were predicted and mapped onto the 3D structures of hexon by homology modeling approach. Then the four peptides were synthesized, and all the four putative epitopes were identified as neutralizing epitopes by enzyme-linked immunosorbent assay (ELISA) and neutralization tests (NT). Finally we incorporated the four epitopes into human adenoviruses 3 (HAdV-3) vectors using the "antigen capsid-incorporation" strategy, and two chimeric adenoviruses, A14R2A3 and A14R4A3, were successfully obtained which displayed A14R2 and A14R4 respectively on the hexon surface of HAdV-3 virions. Further analysis showed that the two chimeric viruses antiserum could neutralize both HAdV-14 and HAdV-3 infection. The neutralization titers of anti-A14R4A3 group were significantly higher than the anti-KLH-A14R4 group (P=0.0442). These findings have important implications for the development of peptide-based broadly protective HAdV-14 and HAdV-3 bivalent vaccine.
authors.affiliation: State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 510230, China; Dongguan Institute of Pediatrics, Dongguan Children's Hospital, Dongguan 523325, China. Electronic address: mat008@163.com.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 510230, China; Dongguan Institute of Pediatrics, Dongguan Children's Hospital, Dongguan 523325, China. Electronic address: tianxingui7902@aliyun.com.
authors.forename: Xingui
authors.initials: X
authors.lastname: Tian
authors.affiliation: Dongguan Institute of Pediatrics, Dongguan Children's Hospital, Dongguan 523325, China. Electronic address: 4931162@qq.com.
authors.forename: Zaixue
authors.initials: Z
authors.lastname: Jiang
authors.affiliation: School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China. Electronic address: jfhuang.dg@gmail.com.
authors.forename: Junfeng
authors.initials: J
authors.lastname: Huang
authors.affiliation: Dongguan Institute of Pediatrics, Dongguan Children's Hospital, Dongguan 523325, China. Electronic address: qianliu_ln@163.com.
authors.forename: Qian
authors.initials: Q
authors.lastname: Liu
authors.affiliation: Dongguan Institute of Pediatrics, Dongguan Children's Hospital, Dongguan 523325, China. Electronic address: lxm020@126.com.
authors.forename: Xiaomei
authors.initials: X
authors.lastname: Lu
authors.affiliation: Dongguan Institute of Pediatrics, Dongguan Children's Hospital, Dongguan 523325, China. Electronic address: 180115636@qq.com.
authors.forename: Qingming
authors.initials: Q
authors.lastname: Luo
authors.affiliation: State Key Laboratory of Respiratory Disease, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou 510230, China. Electronic address: zhourong@gird.cn.
authors.forename: Rong
authors.initials: R
authors.lastname: Zhou
mesh_terms: D062705:Adenovirus Vaccines / Q000008:administration & dosage / Q000235:genetics / Q000276:immunology*; D000260:Adenoviruses, Human / Q000235:genetics / Q000276:immunology*; D000818:Animals; D057134:Antibodies, Neutralizing / Q000097:blood*; D000914:Antibodies, Viral / Q000097:blood; D036022:Capsid Proteins / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D018604:Epitope Mapping; D000939:Epitopes / Q000737:chemistry / Q000235:genetics / Q000276:immunology*; D005260:Female; D008807:Mice, Inbred BALB C; D008958:Models, Molecular; D011487:Protein Conformation; D014614:Vaccines, Synthetic / Q000008:administration & dosage / Q000235:genetics / Q000276:immunology
chemical_list: D062705:Adenovirus Vaccines; D057134:Antibodies, Neutralizing; D000914:Antibodies, Viral; D036022:Capsid Proteins; D000939:Epitopes; D014614:Vaccines, Synthetic; C018315:hexon capsid protein, Adenovirus
keywords: Adenovirus type 14; Bivalent vaccine; Hexon; Neutralizing epitope