广泛强大的尖端特异性人类单克隆抗体抑制SARS-CoV-2 Omicron子系
Melanie R Walker1, Alexander Underwood2, Kasper H Björnsson1
1Centre for Translational Medicine and Parasitology, Department of Immunology and Microbiology, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
Communications biology
|October 1, 2024
概括
新的人类单克隆抗体 (HuMabs) 中和新出现的SARS-CoV-2变种,如Omicron BA.2.86和JN.1. 这些强大的抗体为对抗快速演变的病毒提供了潜在的新疗法选择.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 生物技术是生物技术.
背景情况:
- 新出现的SARS-CoV-2变种不断降低现有的治疗单克隆抗体 (mAbs) 的有效性.
- 目前临床授权的治疗抗体对最近的Omicron亚系如BA.2.86和JN.1缺乏有效性.
研究的目的:
- 隔离和表征新型,广泛的中和人类单克隆抗体 (HuMabs),对当前的SARS-CoV-2变种有效.
- 调查HuMabs针对保存表位的中和机制.
主要方法:
- 从感染SARS-CoV-2的卫生保健工作者中分离人类单克隆抗体 (HuMabs).
- 中和测定针对各种SARS-CoV-2变种,包括Omicron亚系.
- 在SARS-CoV-2尖端蛋白上对抗体结合部位的表皮图谱绘制和表征.
主要成果:
- 鉴定了一种独特的HuMab,K501SP6,通过向一个保留的N终端域表位,中和了多种Omicron子系 (BQ.1,XBB.1,BA.2.86,JN.1).
- 一种RBD特异的HuMab,K501SP3的表征,对早期变体有强大作用,但由于尖端蛋白突变 (F486,E484),最近的Omicron子系避开了它.
- 广泛反应性的非RBD特异性的HuMabs的演示.
结论:
- 广泛中和HuMabs,包括针对保存表位的K501SP6,对于对抗不断演变的SARS-CoV-2变种至关重要.
- 通过抗体表征来了解免疫逃避机制,为下一代治疗提供了洞察力.
- 这些发现为现有的SARS-CoV-2疗法武器库做出了有价值的贡献.
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