Phylogenetic and antigenic analyses of coxsackievirus A6 isolates in Yamagata, Japan between 2001 and 2017
| Autor: | Kenichi Komabayashi, Fumio Katsushima, Tatsuya Ikeda, Sueshi Ito, Hiroshi Yoshida, Shizuka Tanaka, Tsutomu Itagaki, Katsumi Mizuta, Yoko Matsuzaki, Yoko Aoki, Yuriko Katsushima |
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| Rok vydání: | 2019 |
| Předmět: |
Male
Genotype 030231 tropical medicine Coxsackievirus Antibodies Viral Herpangina 03 medical and health sciences 0302 clinical medicine Blood serum Japan Phylogenetics medicine Animals Humans 030212 general & internal medicine Child Neutralizing antibody Phylogeny Enterovirus Molecular Epidemiology General Veterinary General Immunology and Microbiology biology Phylogenetic tree Molecular epidemiology Public Health Environmental and Occupational Health Sequence Analysis DNA biology.organism_classification medicine.disease Antibodies Neutralizing Virology Infectious Diseases Child Preschool biology.protein Molecular Medicine Female Rabbits Antibody Hand Foot and Mouth Disease |
| Zdroj: | Vaccine. 37:1109-1117 |
| ISSN: | 0264-410X |
| DOI: | 10.1016/j.vaccine.2018.12.065 |
| Popis: | Although coxsackievirus A6 (CV-A6) is generally recognized as a causative agent of herpangina in children, CV-A6 infections globally emerged as a new and major cause of epidemic hand-foot-and-mouth-diseases (HFMDs) around 2008. To clarify the longitudinal epidemiology of CV-A6, we carried out sequence and phylogenetic analyses for the VP1 and partially for the VP4-3D regions as well as antigenic analysis using 115 CV-A6 isolates and 105 human sera in Yamagata, Japan between 2001 and 2017. Phylogenetic analysis revealed that CV-A6 isolates were clearly divided into two clusters; strains in circulation between 2001 and 2008 and those between 2010 and 2017. Neutralizing antibody titers of two rabbit antisera, which were immunized with Yamagata isolates in 2001 and 2015, respectively, against 28 Yamagata representative strains as well as the prototype Gdula strain were 1:2560-1:5120 and 1:160-1:640, respectively. The neutralizing antibody titers among residents in Yamagata against the above two strains were similar. Our analyses revealed that there were cross-antigenicities among all analyzed CV-A6 strains, although the newly emerged strains were introduced into Yamagata around 2010 and replaced the previous ones. With regard to control measures, these findings suggest that we can prevent CV-A6 infections through the development of a vaccine that effectively induces neutralizing antibodies against CV-A6, irrespective of genetic cluster. |
| Databáze: | OpenAIRE |
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