具有增强宽度和强度的双特异性抗HIV-1抗体
Stylianos Bournazos1, Anna Gazumyan2, Michael S Seaman3
1Laboratory of Molecular Genetics and Immunology, The Rockefeller University, New York, NY 10065, USA.
Cell
|June 18, 2016
概括
开发具有工程链域的双特异性广泛中和抗体 (biNAbs) 提高了它们中和HIV-1的能力. 在临床前模型中,这些新型biNAbs显示出更好的功效和治疗活性.
科学领域:
- 免疫学
- 病毒学
- 生物技术
背景情况:
- 广泛中和抗体 (bNAbs) 对于抑制HIV-1病毒血症至关重要.
- 需要同时使用bNAbs来防止病毒脱离突变.
- 针对HIV-1包膜糖蛋白 (Env) 上的特异性表位对于强大的抗病毒活性至关重要.
研究的目的:
- 开发具有增强功效和治疗活性的双特异性抗Env中和抗体 (biNAbs).
- 研究工程IgG3链域对biNAb功能的影响.
- 评估经过修改的biNAbs的协同中和和体内疗效.
主要方法:
- 具有修饰IgG3链域的双特异抗体 (biNAbs) 的工程.
- 评估对HIV-1 Env三元体的异质双价结合.
- 在人性化小鼠中评估体外中和疗效.
主要成果:
- 与未经修改的biNAbs相比,设计的链域变体显示出显著改善的中和活性.
- 特定的biNAb组合在体外表现出协同的中和效应.
- 在HIV-1感染的人类化小鼠中观察到增强的体内治疗活性.
结论:
- 具有工程链域的修改后的biNAbs提供了提高中和宽度和功能的创新策略.
- 这些biNAbs是控制HIV-1感染的有希望的候选分子.
- 设计的链域增加了Fab的灵活性,改善了对Env的结合和整体功效.
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