通过使用SpyCatcher和SnoopCatcher配对的工程链分支双特定VHH复合体 ("Dendrobodies")
Kota Kurogane1, Miyuu Sekine2, Ryutaro Asano2
1Graduate School of Science and Engineering, Yamagata University, 4-3-16 Jyonan, Yonezawa, Yamagata, 992-8510, Japan.
Biochemical and biophysical research communications
|February 8, 2026
概括
一种新的Dendrobody架构克服了双特异抗体 (bsAbs) 的硬质障碍,增强了它们的治疗潜力. 这种设计可以通过引导免疫细胞向瘤进行有效的T细胞介导癌细胞杀死.
科学领域:
- 生物技术是生物技术.
- 免疫学 免疫学 免疫学
- 抗体工程 抗体工程
背景情况:
- 双特异性抗体 (bsAbs) 在引导免疫细胞向瘤细胞方面表现有前途.
- 在bsAbs中协同链接的单域抗体 (VHHs) 可能因抗原结合区域的固体阻碍而减少活性.
研究的目的:
- 开发一种新的VHH复杂架构,Dendrobody,以克服bsAbs中的硬体障碍.
- 创建一个模块化平台,用于构建基于VHH的双特异性和多特异性治疗方法.
主要方法:
- 使用直角的SpyCatcher/SpyTag和SnoopCatcher/SnoopTag系统进行C端VHH连接.
- 通过单绑定产生双特异性抗CD3 / 抗EGFR Dendrobody.
- 使用生物层干涉测量评估了复杂的折叠,热稳定性和抗原结合.
主要成果:
- 体表现出正确的折叠和高热稳定性 (Tm = 56°C).
- 已证明强烈的EGFR结合和选择性T细胞介导的细胞毒性对EGFR阳性癌细胞.
- 通过Dendrobody-CD16/EGFR变体确认了抗原的特异性和模块性.
结论:
- Dendrobody框架为构建基于VHH的bsAbs提供了一种策略,以尽量减少固体干扰.
- 这种方法提高了癌症治疗的功能适应性和治疗潜力.
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