缺乏信封和膜开放读取框架的SARS-CoV-2病毒作为疫苗平台
Makoto Kuroda1, Peter J Halfmann2, Ryuta Uraki3,4,5
1Influenza Research Institute, Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin, Madison, WI, 53711, USA.
Nature communications
|May 13, 2025
概括
一种缺乏E和M蛋白质的新型减弱SARS-CoV-2疫苗病毒 (ΔEM) 显示出有前途. 两个剂量或一次强剂接种提供了对子变异的增强保护.
科学领域:
- 病毒学 病毒学
- 疫苗学 疫苗学 疫苗学
- 免疫学 免疫学 免疫学
背景情况:
- 对SARS-CoV-2的广泛保护性疫苗的需求仍然至关重要.
- 现有的疫苗面临着新兴变种和免疫持续时间的挑战.
研究的目的:
- 开发和评估一个减弱的SARS-CoV-2疫苗候选病毒 (ΔEM).
- 在一个仓鼠模型中评估 ΔEM 疫苗的免疫性和保护功效.
主要方法:
- 开发一种复制条件的SARS-CoV-2疫苗病毒 (ΔEM),缺乏包裹 (E) 和膜 (M) 蛋白质基因.
- 疫苗接种后CD8T细胞反应的评估.
- 在初级和强剂疫苗接种方案后,对仓鼠的SARS-CoV-2变种 (Delta和Omicron XBB) 的保护的评估.
主要成果:
- 疫苗病毒只在表达E和M蛋白质的细胞中复制,确保野生类型宿主的安全.
- 用DEM接种疫苗诱导CD8T细胞对尖端和核囊蛋白的反应.
- 两次 ΔEM 疫苗在较低的呼吸道组织中提供了优越的保护,相比于一次剂量对抗 Delta 和 XBB 变种.
- 与mRNA疫苗助推剂相比,作为助推剂的 ΔEM 在呼吸道组织中增强了保护.
结论:
- 这种SARS-CoV-2 ΔEM候选疫苗代表了一种可行且潜在有效的疫苗平台.
- 作为一种强化策略,DEM疫苗显示出广泛保护和提高疗效的潜力.
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