Protective effects of a novel chimeric virus-like particle vaccine against virulent NDV and IBDV challenge

文献类型： 外文期刊

第一作者： Li, Jindou

作者： Li, Jindou;Ding, Jiaxin;Chen, Kainan;Xu, Xiaohong;Shao, Yanan;Zhang, Di;Yu, Xibing;Guo, Chunhong;Ding, Zhuang;Qian, Jing

作者机构：

关键词： Newcastle disease; Infectious bursal disease; Chimeric virus -like particles; Immune protection effect

期刊名称：VACCINE （ 影响因子：5.5； 五年影响因子：4.3 ）

ISSN： 0264-410X

年卷期： 2024 年 42 卷 2 期

页码：

收录情况： SCI

摘要： Newcastle disease (ND) and infectious bursal disease (IBD) pose significant threats to the chicken industry, causing substantial economic losses. Currently, immunization through vaccination is the most effective strategy to prevent ND and IBD but currently used traditional vaccines, including inactivated or attenuated vaccines, face challenges in achieving a balance between immunogenicity and safety. To develop a green and efficient novel vaccine for ND and IBD, we developed a bivalent chimeric virus-like particle vaccine (ND-IBD cVLPs) displaying the ND virus (NDV) HN protein and the IBD virus (IBDV) VP2 protein based on the ND VLPs carrier platform and insect baculovirus expression system. This study aimed to evaluate the immunogenicity and protective efficacy of ND-IBD cVLPs in specific pathogen-free chickens. Chickens were immunized with 50 mu g of purified ND-IBD cVLPs at 7 days old, boosted at 21 days old, and challenged at 42 days old. The results demonstrated that ND-IBD cVLPs stimulated highly effective hemagglutination inhibition antibody levels against NDV HN protein and enzymelinked immunosorbent assay antibody levels against the IBDV VP2 protein. Furthermore, ND-IBD cVLPs provided complete protection against virulent NDV and IBDV challenges and mitigated pathological damage to the lung caused by NDV infection and the bursa of Fabricius caused by IBDV infection. These findings suggest that ND-IBD cVLPs hold promise as a safe and efficient novel vaccine candidate for the effective prevention of ND and IBD, extending the development of a foreign protein delivery platform of ND VLPs.

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