类似于VRC13的bNAb反应与HIV-1包裹中的复杂逃生途径有关
Vinita R Joshi1,2,3, Daniel T Claiborne1, Melissa L Pack1
1Ragon Institute of Mass General, MIT and Harvard, Cambridge, Massachusetts, USA.
Journal of virology
|February 27, 2024
概括
了解HIV-1的进化是设计产生广泛中和抗体 (bNAbs) 的免疫原体的关键. 这项研究揭示了针对VRC13类抗体的复杂病毒逃生途径,确定了未来免疫原体设计的关键突变.
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:
- 开发广泛中和抗体 (bNAbs) 对于HIV-1预防和治疗至关重要.
- 了解HIV-1包裹 (Env) 演变和抗体逃生途径对于合理的免疫原设计至关重要.
- Env的CD4结合部位 (CD4bs) 和V1V2区域是bNAbs的主要目标.
研究的目的:
- 描述病毒进化途径导致HIV-1感染个体对类似VRC13的广泛中和抗体 (bNAbs) 的抵抗.
- 确定HIV-1 Env gp120中的特定突变,使其对CD4bs特定的bNAbs产生抗性,特别是VRC13.
- 为了告知基于血统的免疫原体的设计,旨在引起与VRC13类似的bNAbs.
主要方法:
- 自主HIV-1 env基因的纵向测序来自一个具有开发中和宽度的个体.
- 伪型病毒中和试验用于评估抗体耐药性.
- 病毒Env突变的映射及其对抗体结合和中和的影响.
主要成果:
- 一个HIV-1感染的个体开发了广泛的中和 (>50%的血中和宽度) 针对CD4bs和V1V2区域.
- 病毒进化导致了对VRC13的>2日志耐药性,这是一个特定于CD4bs的bNAb,主要由CD4结合循环 (CD4BL) 中的突变介导.
- 完整的VRC13耐药性需要在CD4BL内部和邻近的合作突变,包括T359I,N363到S362的替代,以及P369L,这表明复杂的逃生机制.
结论:
- 艾滋病毒-1 Env 呈现复杂的进化,通过 CD4BL 中的合作突变对类似 VRC13 的 bNAbs 产生抗性.
- VRC13类bNAbs可能耐快速病毒逃逸,使他们成为治疗应用的有希望的候选人.
- 鉴定病毒中间体和逃生突变为设计基于血统的免疫原提供了洞察力,以成熟VRC13类bNAb反应.
关键词:
这是一个CD4bs.艾滋病病毒 艾滋病病毒 艾滋病病毒在VRC13中使用VRC13.bNAbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbcbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbcbbbbbbbbbbcbbbbbbbbbbbbcbbbbbbbbbbbbcbbbbbbbbbbbbbbcbbbbbbbbbbcbbbbbbbbbbbbbbbbbbbcbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbcbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb逃跑 逃跑 逃跑 逃跑 逃跑 逃跑进化 演化 演化 演化 演化 演化 演化 演化更多相关视频
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