艾滋病毒-1包裹的结构和遗传基础V2顶点由 rhesus 广泛中和抗体的识别
Ryan S Roark1,2,3,4, Rumi Habib4,5, Jason Gorman6,7
1Aaron Diamond AIDS Research Center, Columbia University Vagelos College of Physicians and Surgeons , New York, NY, USA.
The Journal of experimental medicine
|August 18, 2025
概括
研究人员确定了11种针对的HIV-1 V2顶部的抗体系. 这些广泛中和抗体为疫苗设计提供了洞察力,具有低突变率和多种识别模式.
科学领域:
- 免疫学 免疫学 免疫学
- 病毒学 病毒学
- 结构生物学 结构生物学
背景情况:
- 针对HIV-1包裹的V2顶部的广泛中和抗体对于疫苗开发至关重要.
- 之前描述的这种抗体很少,这限制了它们作为疫苗设计模板的实用性.
研究的目的:
- 识别和表征人类免疫缺陷病毒 (SHIV) 感染的 rhesus macaques 的新型V2顶部中和抗体.
- 在非人类灵长类模型中阐明HIV-1 V2顶部识别的结构和遗传基础.
主要方法:
- 从感染SHIV的 rhesus macaques中分离和表征11种抗体系.
- 确定这些抗体中的9个的冷电子显微镜 (cryo-EM) 结构.
- 对208株HIV-1小组的抗体体质突变和宽度的分析.
主要成果:
- 一个单一的V2顶部中和抗体系在大多数子中表现出交叉类宽度.
- 抗体V033-a.01表现出广泛的中和 (<5%的核酸突变,37%的宽度) 和低的体质突变.
- 冷EM结构揭示了八种不同的抗体类别和五种识别拓,回顾了人类抗体识别模式.
- 所有已识别的 rhesus V2 apex 抗体都来自 DH3-15*01 基因的阅读框架二.
结论:
- 这些发现定义了在 rhesus macaques 中 HIV-1 V2 顶部识别的结构和遗传基础.
- 这项研究突出了HIV-1中和过程中关键免疫遗传元素的结构可塑性.
- 已识别的抗体及其识别机制为HIV-1疫苗设计提供了有价值的模板.
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