设计一种新的轻链单域抗体,使IgG格式双特异性抗体设计成为可能
Mingkai Wang1, Qingyuan Xu1,2, Yu Kong1,3
1Key Laboratory of Medical Molecular Virology (MOE/NHC/CAMS) and Shanghai Institute of Infectious Disease and Biosecurity, School of Basic Medical Sciences, Department of Pulmonary and Critical Care Medicine, Department of Liver Surgery and Transplantation, Zhongshan Hospital, Fudan University, Shanghai 200032, China.
Antibody therapeutics
|November 12, 2025
概括
研究人员使用轻链单域抗体 (VHHL) 设计了一种新型双特异性抗体 (bsAb) 格式. 这个新平台提高了下一代抗体治疗的表达效率和结构稳定性.
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工程.
背景情况:
- 双特异性抗体 (bsAbs) 是具有双重向能力的下一代治疗方法.
- 目前的bsAb格式由于复杂的结构而难以表达,同质性差,有效性不稳定.
- 需要新的bsAb格式来克服技术限制并增强稳定性和表达.
研究的目的:
- 设计一种新的双特异抗体 (bsAb) 格式,以提高结构稳定性和表达效率.
- 开发一种用于制造多功能抗体的多功能平台.
主要方法:
- 通过理性设计和菌体显示查,设计了一种新型轻链单域抗体 (VHHL).
- 利用模块化组装和替换策略,将VHHL复制成免疫球蛋白G (IgG) 格式.
- 使用尺寸排除HPLC,生物层干涉计,ELISA和流细胞计来表征得到的bsAbs.
主要成果:
- 开发了一种轻链工程策略,涉及CDR3移植和CDR1/CDR2突变发生,以产生VHHLs.
- 通过菌体查确定了两只小鼠CD16特异性VHHL候选物,具有有利的结合和生物物理性质.
- 将VHHL纳入完整的IgG,产生与天然单克隆抗体具有高度结构相似性的bsAbs,并保留了双抗原结合能力.
结论:
- 介绍了一种基于合理设计的抗原结合VHHL的新型IgG格式的bsAb平台.
- 为开发多功能抗体提供了一种简化和多功能战略.
- 显示了提高稳定性和表达性的 bsAb 疗法改进的潜力.
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