数字农科院2.0

Combination of S1-N-Terminal and S1-C-Terminal Domain Antigens Targeting Double Receptor-Binding Domains Bolsters Protective Immunity of a Nanoparticle Vaccine against Porcine Epidemic Diarrhea Virus

文献类型： 外文期刊

作者： Yang, Dan;Su, Mingjun;Guo, Donghua;Zhao, Feiyu;Wang, Meijiao;Liu, Jiaying;Zhou, Jingxuan;Sun, Ying;Yang, Xu;Qi, Shanshan;Li, Zhen;Zhu, Qinghe;Xing, Xiaoxu;Li, Chunqiu;Cao, Yang;Feng, Li;Sun, Dongbo

作者机构：

关键词： coronavirus;PEDV;nanoparticle vaccine;double receptor-binding domains;protective immunity

期刊名称： ACS NANO

ISSN： 1936-0851

年卷期： 2024 年 18 卷 19 期

页码：

收录情况： SCIE（2024版） ; ; EI（2024版）

摘要： Variants of coronavirus porcine epidemic diarrhea virus (PEDV) frequently emerge, causing an incomplete match between the vaccine and variant strains, which affects vaccine efficacy. Designing vaccines with rapidly replaceable antigens and high efficacy is a promising strategy for the prevention of infection with PEDV variant strains. In our study, three different types of self-assembled nanoparticles (nps) targeting receptor-binding N-terminal domain (NTD) and C-terminal domain (CTD) of S1 protein, named NTDnps, CTDnps, and NTD/CTDnps, were constructed and evaluated as vaccine candidates against PEDV. NTDnps and CTDnps vaccines mediated significantly higher neutralizing antibody (NAb) titers than NTD and CTD recombinant proteins in mice. The NTD/CTDnps in varying ratios elicited significantly higher NAb titers when compared with NTDnps and CTDnps alone. The NTD/CTDnps (3:1) elicited NAb with titers up to 92.92% of those induced by the commercial vaccine. Piglets immunized with NTD/CTDnps (3:1) achieved a passive immune protection rate of 83.33% of that induced by the commercial vaccine. NTD/CTDnps (3:1) enhanced the capacity of mononuclear macrophages and dendritic cells to take up and present antigens by activating major histocompatibility complex I and II molecules to stimulate humoral and cellular immunity. These data reveal that a combination of S1-NTD and S1-CTD antigens targeting double receptor-binding domains strengthens the protective immunity of nanoparticle vaccines against PEDV. Our findings will provide a promising vaccine candidate against PEDV.

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