一种辅助的嵌合体尖峰抗原增强了肺内存T细胞,并诱导了泛沙尔贝科病毒的保护性免疫力
Claudio Counoupas1,2,3, Elizabeth Chan1,2,3, Paco Pino4
1Sydney Infectious Diseases Institute (Sydney ID), Faculty of Medicine and Health, The University of Sydney, Camperdown, NSW, Australia.
NPJ vaccines
|May 9, 2025
概括
一种新型的仿真尖抗原疫苗 (CoVEXS5) 显示出对SARS-CoV-2变种和其他沙贝科病毒的广泛保护,诱导强大的免疫反应并减少动物模型中的疾病严重程度.
科学领域:
- 疫苗学 疫苗学 疫苗学
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
背景情况:
- 下一代疫苗对于对抗不断发展的SARS-CoV-2和未来的冠状病毒威胁至关重要.
- 疫苗开发必须优先考虑广泛的保护,长期的免疫力和公平的全球准入.
研究的目的:
- 开发和评估一种仿制的,全长的尖抗原疫苗 (CoVEXS5),用于广泛的对萨尔贝科病毒的交叉保护.
- 在临床前模型中评估 CoVEXS5 免疫性,疗效和耐用性.
主要方法:
- 开发了含有来自SARS-CoV-2变种突变的奇默尖峰抗原.
- 在CHO细胞中生产和净化候选物 (CoVEXS5).
- 在小鼠和仓鼠模型中评估了CovexS5的免疫性和保护功效,包括对SARS-CoV-2 Omicron XBB.1.5和SARS-CoV-1.5的挑战.
主要成果:
- CoVEXS5表现出高纯度和稳定性,在小鼠中产生交叉反应性中和抗体.
- 用CovexS5接种疫苗可以减少SARS-CoV-2感染小鼠和仓鼠的疾病症状,肺炎和病毒载荷.
- 在mRNA预制小鼠中,CoVEXS5的增强显著增加了对多种萨尔贝科病毒的中和抗体,并诱导了肺内存T细胞.
- 接种CovexS5疫苗可以显著保护子免受SARS-CoV-1的挑战.
结论:
- 嵌合体尖抗原CovexS5显示出作为下一代疫苗的潜力,用于广泛保护对抗sarbecoviruses.
- 使用开放式辅助剂的配方增强了其全球可访问性和影响的潜力.
- CoVEXS5提供了一种有前途的策略,可以改善针对SARS-CoV-2和其他新兴冠状病毒接种疫苗的人群的交叉保护.
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