从顶级中和剂中单细胞分析记忆B细胞,揭示了HCMVTrimer和Pentamer中的多个脆弱点
Matthias Zehner1, Mira Alt2, Artem Ashurov1
1Laboratory of Experimental Immunology, Institute of Virology, Faculty of Medicine and University Hospital Cologne, University of Cologne, 50931 Cologne, Germany.
Immunity
|November 15, 2023
概括
研究人员通过分析B细胞反应,确定了向人类细胞巨乳病毒 (HCMV) 的强效抗体. 这些抗体可以中和多种HCMV菌株,为预防和治疗提供了新的希望.
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:
- 人类细胞巨乳病毒 (HCMV) 对脆弱人群,包括胎儿,新生儿和免疫功能低下的人群构成重大健康风险.
- 目前对HCMV的治疗策略和疫苗开发仍然有限,这凸显了对新型干预措施的迫切需要.
研究的目的:
- 研究人类B细胞对HCMV的反应,专注于顶级中和剂.
- 确定HCMV表面复合体上的脆弱部位,并描述抗体介导中和的结构基础.
主要方法:
- 针对HCMV五和三复合物的记忆B细胞的单细胞分析.
- 高分辨率冷电子显微镜 (cryo-EM) 用于确定抗体-标结构.
- 对各种HCMV菌株的抗体中和幅度的评估,包括临床分离物.
主要成果:
- 在HCMV表面糖蛋白上确定了脆弱部位,包括gH/gL子单元和复合体特定组件 (UL128/130/131A,gO).
- 冷-EM揭示了这些HCMV标的抗体中和背后的结构机制.
- 发现了强效的抗体,证明了HCMV菌株的宽谱中和,超过了现有的临床试验抗体.
结论:
- 该研究提供了对HCMV中和机制在分子水平的关键见解.
- 鉴定出有力的中和抗体代表了开发新型HCMV治疗方法和预防策略的有希望的候选人.
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