Development and characterization of a recombinant infectious bronchitis virus expressing the ectodomain region of S1 gene of H120 strain
文献类型: 外文期刊
第一作者: Wei, Yan-Quan
作者: Wei, Yan-Quan;Guo, Hui-Chen;Dong, Hu;Wang, Hai-Ming;Xu, Jin;Sun, De-Hui;Cai, Xue-Peng;Liu, Ding-Xiang;Sun, Shi-Qi;Liu, Ding-Xiang;Fang, Shou-Guo
作者机构:
关键词: Infectious bronchitis virus;Recombinant virus;H120;Immunogenicity
期刊名称:APPLIED MICROBIOLOGY AND BIOTECHNOLOGY ( 影响因子:4.813; 五年影响因子:4.697 )
ISSN:
年卷期:
页码:
收录情况: SCI
摘要: Infectious bronchitis (IB), caused by infectious bronchitis virus (IBV), is a highly contagious chicken disease, and can lead to serious economic losses in poultry enterprises. The continual introduction of new IBV serotypes requires alternative strategies for the production of timely and safe vaccines against the emergence of variants. Modification of the IBV genome using reverse genetics is one way to generate recombinant IBVs as the candidates of new IBV vaccines. In this study, the recombinant IBV is developed by replacing the ectodomain region of the S1 gene of the IBV Beaudette strain with the corresponding fragment from H120 strain, designated as rBeau-H120(S1e). In Vero cells, the virus proliferates as its parental virus and can cause syncytium formation. The peak titer would reach 105.9 50 % (median) tissue culture infective dose/mL at 24 h post-infection. After inoculation of chickens with the recombinant virus, it demonstrated that rBeau- H120(S1e) remained nonpathogenic and was restricted in its replication in vivo. Protection studies showed that vaccination with rBeau-H120 (S1e) at 7-day after hatch provided 80% rate of immune protection against challenge with 103 50 % embryos infection dose of the virulent IBV M41 strain. These results indicate that rBeau-H120 (S1e) has the potential to be an alternative vaccine against IBV based on excellent propagation property and immunogenicity. This finding might help in providing further information that replacement of the ectodomain fragment of the IBV Beaudette S1 gene with that from a present field strain is promising for IBV vaccine development.
分类号: Q939.9`Q81
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