跨多种菌株的HIV-1bNAbs的功能活动是由结合点驱动的,可以通过FC工程来增强
Chia Jung Li1, Eunice Lim1, Meredith Phelps1
1Ragon Institute of Mass General Brigham, MIT, and Harvard, Cambridge; MA, 02139, USA.
bioRxiv : the preprint server for biology
|November 26, 2025
概括
广泛中和抗体 (bNAbs) 根据其点和病毒菌株对HIV-1的有效性有所不同. Fc修饰可以增强抗体依赖的细胞毒性 (ADCC) 和细胞化 (ADCP) 以改善HIV治疗.
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:
- 广泛中和抗体 (bNAbs) 是HIV-1治疗和预防的关键候选者.
- 它们的有效性依赖于直接中和和Fc依赖的效应器功能,如ADCC和ADCP.
- 这些功能的跨bNAb表位,HIV-1菌株和Fc区域的变异性需要进行系统的调查.
研究的目的:
- 系统地评估bNAb表位特异性和Fc修饰如何影响ADCC和ADCP对各种HIV-1菌株的影响.
- 了解病毒Env序列对bNAb效应器功能的影响.
- 通过Fc工程探索增强bNAb介导抗病毒活性的策略.
主要方法:
- 评估了20个针对5种不同的Env表位体的bNAbs,针对9种HIV-1菌株.
- 评估了ADCC和ADCP的活动.
- 研究了Fc子类切换和特定Fc突变对效应器功能的影响.
主要成果:
- 皮层特异性和HIV-1 Env序列批判性地确定了bNAb效应器功能.
- CD4结合部位 (CD4bs) 和V3甘氨酸bNAbs显示出强大的ADCC和ADCP.
- V1/V2顶峰bNAbs偏爱ADCP,MPERbNAbs显示有选择性的ADCC,而gp120/gp41接口bNAbs的活动有限.
- Fc修改,特别是IgG3亚类切换,显著增强了ADCP,即使对抗耐药菌株.
结论:
- 抗体表位和病毒Env背景之间的相互作用显著影响bNAb效应器功能.
- 包括子类切换和特定突变在内的Fc工程提供了一个可行的策略,以增强ADCC和ADCP的潜力,以改善HIV-1治疗方法.
- 具有优化Fc区域的bNAbs的合理设计有望为更有效的HIV-1治疗和预防提供希望.
关键词:
ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC ADCC is also known as ADCC ADCC ADCC is also known as ADCC在ADCP中,ADCP是ADCP.这是一个Env序列.在Fc工程方面,工程师艾滋病毒 bNAbbb更多相关视频
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