一种强大且广泛的中和纳米体,用于SARS-CoV-2病毒,包括所有主要的Omicron菌株
Hebang Yao1, Hongyang Wang1, Zhaoyong Zhang2
1School of Life Science and Technology ShanghaiTech University Shanghai China.
MedComm
|October 30, 2023
概括
一种新的纳米体,Nb4,有效地中和了包括Omicron在内的SARS-CoV-2变种. 在小鼠体内注射Nb4为对Omicron感染提供了完全的保护,显示了其作为广泛治疗的潜力.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
背景情况:
- 严重急性呼吸系统综合征冠状病毒2 (SARS-CoV-2) 呈现出高传染性和免疫逃避.
- 开发广泛的预防和治疗抗体对于未来的流行病准备至关重要.
研究的目的:
- 发现和描述能够中和SARS-CoV-2的纳米体 (Nbs),重点关注Omicron变种.
- 评估纳米体Nb4对SARS-CoV-2的治疗和预防潜力.
主要方法:
- 体显示技术被用来识别中和纳米体.
- 进行了晶体结构分析,以阐明Nb4与Spike蛋白的受体结合域 (RBD) 的结合机制.
- 在小鼠模型中进行了体内预防和治疗实验.
主要成果:
- 纳米体Nb4证明了对多种Delta和Omicron亚型 (BA.1,BA.1.1,BA.2,BA.5,BQ.1,XBB.1) 的强有力的中和作用.
- 结构研究显示,Nb4与RBD上的ACE2结合部位重叠的表位结合,抑制病毒的进入.
- 在小鼠肺部中,Nb4显著降低了Omicron病毒载荷,并且在预防性地注射鼻内时提供了完整的保护.
结论:
- Nb4具有出色的物理化学特性和广泛的中和活性,可以对抗包括Omicron在内的SARS-CoV-2变种.
- 保存的结合表位表明Nb4对当前和未来的Omicron菌株的疗效.
- Nb4代表了对抗COVID-19的预防性和治疗性干预的有希望的候选人.
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