一个合成的重链可变域抗体库 (VHL) 提供具有良好的开发能力的高功能抗体
Guiying Pang1,2,3, Ruixue Wang2, Hongxu Yang2
1College of Pharmacy, Anhui University of Traditional Chinese Medicine, Hefei, People's Republic of China.
Protein science : a publication of the Protein Society
|March 18, 2025
概括
使用IGHV3-23*04基因创建了一个新的合成抗体库,以发现重链变量 (VH) 域. 该库成功生成了针对多个治疗点的高亲和度,功能性VH抗体.
科学领域:
- 生物技术是生物技术.
- 免疫学 免疫学 免疫学
- 蛋白质工程是指蛋白质的工程.
背景情况:
- 合成抗体库为发现治疗生物制药提供了一个有希望的途径.
- 重链变量 (VH) 域是有价值的,因为其免疫性较低,组织透率高,具有多种结合表位.
研究的目的:
- 构建和验证一种合成抗体库,用于生成针对各种抗原的高 afinity VH 域.
- 评估来自设计图书馆的抗体的开发能力和功能.
主要方法:
- 使用人类IGHV3-23*04生殖系基因构建了一个合成库,在CDR3区域引入多样性.
- 该图书馆包括2.6×10^11个克隆,对SARS-CoV-2 RBD,IL17A,BCMA和GPRC5D进行了选.
- 选择的VH-Fc抗体的特征是亲和力,特异性,功能活性和可开发性质.
主要成果:
- 对于每个目标抗原,确定了31-55个VH域.
- VH-Fc抗体表现出高亲属性 (高达4.6nM) 和特异性,没有结合CHO-S细胞.
- 抗RBD和抗IL17A抗体在受体阻断试验中显示出强大的功能活性.
- 抗体表现出有利的发育特性,包括热和合稳定性,水友性和抗聚合性.
结论:
- 一个合理设计的合成抗体库可以有效地产生具有理想物理化学性质的高亲和度,功能VH域抗体.
- 这种通用方法加速了针对治疗开发的抗体候选人的选择.
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