全HLA-DR mAb 44H10的人化化在抗体框架中的关键残留物上挂
Audrey Kassardjian1,2, Danton Ivanochko1, Brian Barber2
1Program in Molecular Medicine, The Hospital for Sick Children Research Institute, 686 Bay Street, Toronto, ON M5G 0A4, Canada.
Antibodies (Basel, Switzerland)
|July 25, 2024
概括
研究人员通过工程框架区域降低了用于人类治疗的动物抗体的免疫性,保持了抗原结合. 这种人性化的抗体对MHCII类向治疗和疫苗具有前景.
科学领域:
- 免疫学 免疫学 免疫学
- 生物技术是生物技术.
- 结构生物学 结构生物学
背景情况:
- 降低动物衍生的单克隆抗体 (mAbs) 的免疫性对于人类的治疗疗效至关重要.
- 传统的人性化侧重于互补性决定区域 (CDR),但抗体框架区域也影响抗原结合.
- 来自小鼠的泛HLA-DR mAb 44H10显示,框架区域在抗原结合中具有显著的参与.
研究的目的:
- 在保持其抗原结合特征的同时,使小鼠mAb 44H10变得人性化.
- 研究框架区域在mAb 44H10.10的抗原结合性质中的作用.
- 为MHCII类向治疗药物和疫苗开发一个人性化的抗体支架.
主要方法:
- 在抗体人性化方面采用结构导向的方法.
- 确定并恢复了直接或间接抗原相互作用的关键框架残留物.
- 设计了一个人性化版本的44H10 mAb.
主要成果:
- 工程人性化抗体的亲和力,生物物理特征和分子结合基因与父母的小鼠mAb 44H10相似.
- 结构导向的方法成功地解决了框架区域对抗原结合的贡献.
- 人性化的抗体保留了原始小鼠抗体所需的结合特性.
结论:
- 结构导向的人性化有效地保留了mAbs的抗原结合特性,并且具有显著的框架区域参与.
- 人性化的44H10 mAb是开发针对MHCII类分子的新疗法和疫苗的可行候选者.
- 这种方法有助于开发更安全,更有效的基于抗体的免疫疗法.
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