高度可扩展的预输稳定RSV F疫苗具有增强的免疫性和强大的保护
Qingrui Huang1, Qingyun Lang2,3, Yao Li2
1Changping Laboratory, Beijing, China. huangqr@cpl.ac.cn.
Nature communications
|August 21, 2025
概括
一种新的普罗林扫描策略稳定了呼吸道同胞病毒 (RSV) 前输F蛋白,促进了疫苗的开发. 这种方法产生了稳定的抗原 (preF7P),具有改善的免疫性和对RSV菌株的广泛保护.
科学领域:
- 疫苗学
- 结构生物学
- 蛋白质工程
背景情况:
- 稳定呼吸道同胞病毒 (RSV) F蛋白质在其输血前形状对于疫苗的有效性至关重要,但也带来了重大挑战.
- 稳定F蛋白的常规方法通常效率低下,表达水平低.
研究的目的:
- 开发一种新且有效的稳定RSV前输F抗原的策略.
- 创建一个稳定的预注射F (preF) 抗原变体,具有增强的免疫性和保护能力.
主要方法:
- 采用了素扫描策略,将七种素替代物引入RSV F蛋白中以实现稳定.
- 结构和生化验证证了preF7P变体保持预注射形状的能力.
- 在小鼠和棉鼠模型中评估了免疫性和保护效果,并对非人类灵长类动物进行了评估.
主要成果:
- 在 preF7P 变种中,在预注射形状上表现出结构和生化稳定性.
- 与现有的DS-cav2抗原相比,PreF7P具有更高的免疫性,中和抗体标位增加了1. 8倍.
- 在临床前模型中,preF7P抗原提供了对RSV A和B菌株的保护,并在临床研究中引起了强大的,持续的免疫反应.
结论:
- 素扫描策略提供了一种有效和精简的方法来稳定RSV F蛋白等I类融合蛋白.
- 预F7P抗原是开发下一代RSV疫苗的有希望的候选者.
- 这种方法有可能加速用于I类融合蛋白的其他病毒病原体的疫苗开发.
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