The establishment and characteristics of cell-adapted IBV strain H120

The establishment and characteristics of cell-adapted IBV strain H120
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细胞适应性IBV毒株H120的建立及特性

DOI:
10.1007/s00705-016-3008-3
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发表时间:
2016-08
影响因子:
2.7
通讯作者:
Liu Hui
Liu Hui
中科院分区:
医学4区
文献类型:
--
作者:
Zhou Yingshun;Yang Xin;Wang Hongning;Zeng Fanya;Zhang Zhikun;Zhang Anyun;Liu Hui

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鸡传染性支气管炎病毒(Avian Infectious Bronchitis Virus,IBV)是世界范围内禽类的重要病原。疫苗接种是预防和控制IBV感染的唯一有效途径。H120是最安全的疫苗株之一,已在全球范围内作为一级疫苗使用,但不能适应传代细胞,严重制约了疫苗的质量。在反向遗传学研究的基础上,我们将H120的spike基因全部替换为Beaudette p65的spike基因,构建了重组菌株R-H120-Beaudette p65(S)。对R-H120-Beaudette-p65(S)的复制动力学、毒力和免疫学特性进行了研究。结果表明,R-H120-Beaudette-p65(S)在鸡胚内的复制动力学和胚胎毒力等生物学特性与H120相似。此外,R-H120-Beaudette-p65(S)可以在用M41毒株攻击的鸡中诱导类似的抗体滴度并提供高达80%的免疫保护。这些结果表明R-H120-Beaudette-p65(S)具有进一步开发为细胞适应性疫苗的潜力。
Avian infectious bronchitis virus is an important pathogen in poultry worldwide. Vaccination is the only effective way to prevent and control IBV infection. H120, one of the safest vaccine strains, which has been used worldwide as a primary vaccine, cannot adapt to passaged cells, which severely restricts the quality of the vaccine. Based on the reverse genetics of our previous research work, we constructed the recombinant R-H120-Beaudette-p65(S) strain by replacing the complete spike gene of H120 with the corresponding spike gene from the Beaudette p65 strain. Some biological characteristics, including replication kinetics, virulence and immunological properties of R-H120-Beaudette-p65(S) have been evaluated. The results showed that biological characteristics of R-H120-Beaudette-p65(S), such as replication kinetics in embryonated chicken eggs (ECEs) and embryo virulence, were similar to those of H120. In addition, R-H120-Beaudette-p65(S) could induce a similar antibody titre and provide up to 80 % immune protection in chickens challenged with the M41 strain. These results indicate that R-H120-Beaudette-p65(S) has the potential for further development as a cell-adapted vaccine.
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表达新城疫病毒 (NDV) 血凝素神经氨酸酶 (HN) 蛋白的重组传染性支气管炎病毒 (IBV) H120 疫苗株可保护鸡免受 IBV 和 NDV 攻击
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