Novel liquid-phase blocking ELISA using single-domain antibody M8 and virus-like particles for in-vitro potency assessment of foot-and-mouth disease virus-like particle vaccine

文献类型： 外文期刊

第一作者： Li, Haozhou

作者： Li, Haozhou;Zhang, Yaya;Zhang, Yun;Guo, Huichen;Sun, Shiqi;Li, Haozhou;van der Poel, Wim;Dekker, Aldo;Harmsen, Michiel

作者机构：

关键词： Foot-and-mouth disease; Virus like particle vaccine; Single domain antibody; Vaccine quality control; In vitro potency evaluation; Statistic model

期刊名称：VACCINE （ 影响因子：3.5； 五年影响因子：3.5 ）

ISSN： 0264-410X

年卷期： 2025 年 62 卷

页码：

收录情况： SCI

摘要： Potency tests for inactivated foot-and-mouth disease (FMD) vaccines involve either in vivo challenge trials in target animals or in vitro tests. However, evaluating potency of FMD virus-like particle (VLP) vaccines currently lack in vitro tools. We developed a liquid-phase blocking ELISA (LPBE) using a broadly neutralizing single-domain antibody (M8) and FMD VLPs to assess antibody titers in animals vaccinated with FMD serotype O VLPs. We utilized 505 negative sera and 32 sera of pigs infected or vaccinated with other viruses than FMDV to validate the M8 LPBE detection limit. The M8 LPBE was compared to virus neutralizing test and conventional LPBE using 338 sera from PD50 potency tests in cattle and pigs. The results were analyzed using logistic models. The M8 LPBE showed superior correlation with protection, with an average titer of 1.7 logio corresponding to a potency of 3 PD5o/dose.

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