数字农科院2.0

A Pool of Ferritin Nanoparticles Delivering Six Proteins of African Swine Fever Virus Induces Robust Humoral and Cellular Immune Responses in Pigs

文献类型： 外文期刊

作者： Lu, Zhanhao;Zhong, Dailang;Song, Xin;Lan, Jing;Wang, Yanjin;Luo, Rui;Chen, Shengmei;Huang, Ruojia;Qiu, Hua-Ji;Li, Yongfeng;Wang, Tao;Sun, Yuan

作者机构：

关键词： African swine fever;African swine fever virus;antigen candidates;ferritin nanoparticle;immune responses

期刊名称： VACCINES

ISSN：

年卷期： 2026 年 14 卷 1 期

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收录情况： SCIE（2025版）

摘要： Background/Objectives: Inadequate characterization of protective antigens poses a significant challenge to the development of vaccines for African swine fever (ASF), particularly for antigen-dependent formulations such as subunit, mRNA, and recombinant viral vector vaccines. To address this, we aimed to screen African swine fever virus (ASFV) antigens and enhance their immunogenicity using a nanoparticle delivery platform. Methods: Here, six ASFV antigens (p30, p54, pE120R, pH124R, pE184L, and CD2v) were purified and used to immunize pigs individually. The effects of antibodies induced by these six antigens on ASFV replication or hemadsorption was evaluated in primary porcine alveolar macrophages (PAMs). These six antigens were, respectively, conjugated to ferritin via SpyTag/SpyCatcher to prepare six ferritin nanoparticles. A cocktail of the six mixed antigens or a cocktail of the six mixed nanoparticles was used to immunize pigs separately, and the differences in induced humoral and cellular immune responses were compared. Results: Antibodies generated against p30, p54, pE120R, pH124R, and pE184L in immunized pigs significantly inhibited ASFV replication in PAMs, while anti-CD2v antibodies specifically obstructed the hemadsorption of ASFV. Notably, immunization with a cocktail of these antigen-conjugated nanoparticles elicited a stronger virus-inhibitory antibody response compared to immunization with a cocktail of antigen monomers. Furthermore, nanoparticle immunization induced robust cellular immunity, evidenced by elevated serum IFN-gamma, increased numbers of ASFV-specific IFN-gamma-secreting cells, and an expanded CD8+ T cell population. Conclusions: Our study identifies a set of promising ASFV antigen candidates and demonstrates that ferritin nanoparticle delivery synergistically enhances both humoral and cellular immune responses against ASFV, providing a rational strategy for multi-antigen ASF vaccine design.

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