一种通过双特异性抗体介导预定位增强HIV-1中和的广泛抗体
Soohyun Kim1,2, Caelan E Radford3,4, Duo Xu1,2,5
1Department of Biochemistry, Stanford University School of Medicine, Stanford, CA, USA.
Nature communications
|May 18, 2025
概括
研究人员开发了一种针对HIV-1NHR的新型双特异抗体. 这种抗体显著提高中和幅度,并降低小鼠的病毒载量,提供了一个有前途的新疗法策略.
科学领域:
- 病毒学 病毒学
- 免疫学 免疫学 免疫学
- 药物发现 药物发现 药物发现
背景情况:
- 一类病毒融合蛋白具有保存的毛前中间体 (PHI).
- 针对PHI的抗体通常是弱中和剂.
- 针对gp41 N-heptad重复 (NHR) 的抗体通过FcγRI增强中和.
研究的目的:
- 在缺乏FcγRI的细胞中开发一种增强的HIV-1中和抗体.
- 通过将NHR向抗体与抗CD4抗体结合,产生双特异性抗体 (bsAb).
主要方法:
- 构建一个双特异性抗体 (bsAb) 融合NHR向和抗CD4抗体.
- 在基于细胞的测试中评估bsAb中和功效和范围.
- 评估bsAb在减少HIV-1感染的人性化雄性小鼠病毒载荷的疗效.
- 病毒包裹测序以识别在bsAb压力下的抵抗突变.
主要成果:
- 在bsAb证明了5000倍提高中和功效.
- 与现有的广泛中和抗体相比,bsAb表现出前所未有的中和范围.
- 在HIV-1感染的人性化雄性小鼠中,bsAb显著降低了病毒载量.
- 在bsAb压力下发现的NHR突变表明病毒适应性受损.
结论:
- 该NHR是HIV-1的可行的治疗标.
- 开发的bsAb代表了一类新的广泛中和抗体.
- 这一战略对开发新型HIV-1治疗药物充满希望.
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