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Bai R, Sikkema RS, Li CR, Munnink BBO, Wu J, Zou L, Jing Y, Lu J, Yuan R, Liao M, Koopmans MP, Ke CW. Antigenic Variation of Avian Influenza A(H5N6) Viruses, Guangdong Province, China, 2014-2018. Emerg Infect Dis 2019; 25:1932-1945. [PMID: 31538920 PMCID: PMC6759240 DOI: 10.3201/eid2510.190274] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Market surveillance showed continuing circulation of avian influenza A(H5N6) virus in live poultry markets in Guangdong Province in 2017, despite compulsory vaccination for avian influenza A(H5Nx) and A(H7N9). We analyzed H5N6 viruses from 2014-2018 from Guangdong Province, revealing antigenic drift and decreased antibody response against the vaccine strain in vaccinated chickens.
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Affiliation(s)
| | | | - Cong rong Li
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (R. Bai, C. Li, J. Wu, L. Zou, Y. Jing, J. Lu, R. Yuan, C. Ke)
- Erasmus Medical Centre, Rotterdam, the Netherlands (R.S. Sikkema, B.B. Oude Munnink, M.P.G. Koopmans)
- Southern Medical University Guangzhou (C. Li, Y. Jing, C. Ke)
- South China Agricultural University, Guangzhou (M. Liao)
| | - Bas B. Oude Munnink
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (R. Bai, C. Li, J. Wu, L. Zou, Y. Jing, J. Lu, R. Yuan, C. Ke)
- Erasmus Medical Centre, Rotterdam, the Netherlands (R.S. Sikkema, B.B. Oude Munnink, M.P.G. Koopmans)
- Southern Medical University Guangzhou (C. Li, Y. Jing, C. Ke)
- South China Agricultural University, Guangzhou (M. Liao)
| | - Jie Wu
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (R. Bai, C. Li, J. Wu, L. Zou, Y. Jing, J. Lu, R. Yuan, C. Ke)
- Erasmus Medical Centre, Rotterdam, the Netherlands (R.S. Sikkema, B.B. Oude Munnink, M.P.G. Koopmans)
- Southern Medical University Guangzhou (C. Li, Y. Jing, C. Ke)
- South China Agricultural University, Guangzhou (M. Liao)
| | - Lirong Zou
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (R. Bai, C. Li, J. Wu, L. Zou, Y. Jing, J. Lu, R. Yuan, C. Ke)
- Erasmus Medical Centre, Rotterdam, the Netherlands (R.S. Sikkema, B.B. Oude Munnink, M.P.G. Koopmans)
- Southern Medical University Guangzhou (C. Li, Y. Jing, C. Ke)
- South China Agricultural University, Guangzhou (M. Liao)
| | - Yi Jing
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (R. Bai, C. Li, J. Wu, L. Zou, Y. Jing, J. Lu, R. Yuan, C. Ke)
- Erasmus Medical Centre, Rotterdam, the Netherlands (R.S. Sikkema, B.B. Oude Munnink, M.P.G. Koopmans)
- Southern Medical University Guangzhou (C. Li, Y. Jing, C. Ke)
- South China Agricultural University, Guangzhou (M. Liao)
| | - Jing Lu
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (R. Bai, C. Li, J. Wu, L. Zou, Y. Jing, J. Lu, R. Yuan, C. Ke)
- Erasmus Medical Centre, Rotterdam, the Netherlands (R.S. Sikkema, B.B. Oude Munnink, M.P.G. Koopmans)
- Southern Medical University Guangzhou (C. Li, Y. Jing, C. Ke)
- South China Agricultural University, Guangzhou (M. Liao)
| | - Runyu Yuan
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (R. Bai, C. Li, J. Wu, L. Zou, Y. Jing, J. Lu, R. Yuan, C. Ke)
- Erasmus Medical Centre, Rotterdam, the Netherlands (R.S. Sikkema, B.B. Oude Munnink, M.P.G. Koopmans)
- Southern Medical University Guangzhou (C. Li, Y. Jing, C. Ke)
- South China Agricultural University, Guangzhou (M. Liao)
| | - Ming Liao
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, China (R. Bai, C. Li, J. Wu, L. Zou, Y. Jing, J. Lu, R. Yuan, C. Ke)
- Erasmus Medical Centre, Rotterdam, the Netherlands (R.S. Sikkema, B.B. Oude Munnink, M.P.G. Koopmans)
- Southern Medical University Guangzhou (C. Li, Y. Jing, C. Ke)
- South China Agricultural University, Guangzhou (M. Liao)
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An SH, Lee CY, Hong SM, Choi JG, Lee YJ, Jeong JH, Kim JB, Song CS, Kim JH, Kwon HJ. Bioengineering a highly productive vaccine strain in embryonated chicken eggs and mammals from a non-pathogenic clade 2·3·4·4 H5N8 strain. Vaccine 2019; 37:6154-6161. [PMID: 31495597 DOI: 10.1016/j.vaccine.2019.08.074] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 08/17/2019] [Accepted: 08/28/2019] [Indexed: 11/18/2022]
Abstract
The clade 2·3·4·4 H5Nx is a highly pathogenic avian influenza (HPAI) virus, which first appeared in China and has spread worldwide since then, including Korea. It is divided into subclades a - d, but the PR8-derived recombinant clade 2·3·4·4 a viruses replicate inefficiently in embryonated chicken eggs (ECEs). High virus titer in ECEs and no mammalian pathogenicity are the most important prerequisites of efficacious and safer vaccine strains against HPAI. In this study, we have synthesized hemagglutinin (HA) and neuraminidase (NA) genes based on the consensus amino acid sequences of the clade 2·3·4·4a and b H5N8 HPAIVs, using the GISAID database. We generated PR8-derived H5N8 recombinant viruses with single point mutations in HA and NA, which are related to efficient replication in ECEs. The H103Y mutation in HA increased mammalian pathogenicity as well as virus titer in ECEs, by 10-fold. We also successfully eradicated mammalian pathogenicity in H103Y-bearing H5N8 recombinant virus by exchanging PB2 genes of PR8 and 01310 (Korean H9N2 vaccine strain). The final optimized H5N8 vaccine strain completely protected against a heterologous clade 2·3·4·4c H5N6 HPAIV in chickens, and induced hemagglutination inhibition (HI) antibody in ducks. However, the antibody titer of ducks showed age-dependent results. Thus, H103Y and 01310PB2 gene have been successfully applied to generate a highly productive, safe, and efficacious clade 2·3·4·4 H5N8 vaccine strain in ECEs.
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Affiliation(s)
- Se-Hee An
- Laboratory of Avian Diseases, College of Veterinary Medicine, Seoul National University, 08826 Seoul, Republic of Korea
| | - Chung-Young Lee
- Department of Microbiology and Immunology, Emory University School of Medicine, 1510 Clifton Road, Atlanta, GA 30322, USA
| | - Seung-Min Hong
- Laboratory of Avian Diseases, College of Veterinary Medicine, Seoul National University, 08826 Seoul, Republic of Korea
| | - Jun-Gu Choi
- Avian Disease Division, Animal and Plant Quarantine Agency, 177, Hyeoksin 8-ro, Gyeongsangbuk-do 39660, Republic of Korea
| | - Youn-Jeong Lee
- Avian Disease Division, Animal and Plant Quarantine Agency, 177, Hyeoksin 8-ro, Gyeongsangbuk-do 39660, Republic of Korea
| | - Jei-Hyun Jeong
- Laboratory of Avian Diseases, College of Veterinary Medicine, Konkuk University, 05029 Seoul, Republic of Korea
| | - Jun-Beom Kim
- Laboratory of Avian Diseases, College of Veterinary Medicine, Konkuk University, 05029 Seoul, Republic of Korea
| | - Chang-Seon Song
- Laboratory of Avian Diseases, College of Veterinary Medicine, Konkuk University, 05029 Seoul, Republic of Korea
| | - Jae-Hong Kim
- Laboratory of Avian Diseases, College of Veterinary Medicine, Seoul National University, 08826 Seoul, Republic of Korea; Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, 08826 Seoul, Republic of Korea
| | - Hyuk-Joon Kwon
- Laboratory of Poultry Medicine, Department of Farm Animal Medicine, College of Veterinary Medicine, Seoul National University, 08826 Seoul, Republic of Korea; Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, 08826 Seoul, Republic of Korea; Farm Animal Clinical Training and Research Center (FACTRC), GBST, Seoul National University, Kangwon-do, Republic of Korea.
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