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开发DARPin T细胞参与剂,专门针对与瘤相关的HLA/复合体

Natalia Venetz-Arenas¹, Tim Schulte^2,3, Sandra Müller¹

¹Molecular Partners AG, Schlieren-Zurich, Switzerland.

|December 1, 2025

概括

研究人员开发了两种专门设计的脚蛋白重复蛋白 (DARPins),以向癌细胞. 这些工程蛋白激活T细胞进行免疫疗法,克服亲和力和特异性的挑战,以更好地向瘤.

科学领域:

免疫学免疫学免疫学
结构生物学结构生物学
生物技术是生物技术.

背景情况:

针对HLA受限瘤抗原的T细胞受体 (TCR) 向对于癌症免疫疗法至关重要,但面临着亲和性和特异性的挑战.
T细胞参与剂提供了一个有希望的策略来克服这些局限性.

研究的目的:

开发双特异性设计的安基林重复蛋白 (DARPins),同时向HLA-I/复合体和CD3e.
评估这些DARPins在激活T细胞对瘤点的有效性和特异性.

主要方法:

产生针对HLA-I/复合体和CD3e的双特异性DARPins.
进行X扫描突变发生和功能杀死试验,以确认特异性.
低温电子显微镜 (cryo-EM) 用于确定DARPin/HLA/复合物的结构.

主要成果:

成功生成了高亲和性T细胞参与剂,引发了CD8+T细胞激活.
通过突变发生和功能测定证实了强大的特异性.
低温EM检测显示了DARPin结构的刚性,与HLA-复合体相互作用.

结论:

双特异性DARPins代表了免疫瘤治疗的一个有前途的方法.
这项研究表明,快速开发高亲和度,针对HLA/标的特定DARPins的可行性.
这些DARPins可以与抗CD3eDARPins相结合,以增强T细胞参与.

关键词:

癌症癌症癌症癌症免疫学免疫学免疫学结构生物学是结构生物学.

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