一个以为中心的TCR模仿结合模块的De novo设计和结构
Karsten D Householder1,2, Xinyu Xiang1, Kevin M Jude1
1Department of Molecular and Cellular Physiology, Stanford University School of Medicine; Stanford, CA 94305 USA.
bioRxiv : the preprint server for biology
|January 7, 2025
概括
我们开发了一种新的T细胞受体 (TCR) 模仿器,用于精确的癌症免疫治疗. 这种模拟器以高特异性的瘤抗原为目标,提供了潜在的新治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 结构生物学 结构生物学
- 癌症治疗 癌症治疗
背景情况:
- 模仿T细胞受体 (TCR) 是用于向癌症免疫治疗的工程蛋白质.
- 有效的TCR模仿剂需要对瘤抗原的高特异性,由-MHC (pMHC) 复合体呈现.
- NY-ESO-1 是一种与癌症免疫疗法相关的瘤抗原.
研究的目的:
- 设计和描述一个新的阿尔法螺旋式TCR模拟器,针对NY-ESO-1/HLA-A*02复合体.
- 评估设计的TCR模拟器的特异性和亲和力.
- 评估TCR模仿作为T细胞参与者的潜在治疗窗口.
主要方法:
- 一个模仿阿尔法螺旋TCR的新设计.
- 生物化学试验以确定结合亲和力 (Kd = 9.5 nM).
- 在2.05 Å分辨率下进行X射线晶体学以确定TCR模仿/pMHC复合物的结构.
- 在HLA-A*02的结构信息化选中.
主要成果:
- 一个新的α-螺旋TCR模拟器成功设计,对NY-ESO-1/HLA-A*02复合体表现出纳米分子亲和力.
- 结构分析显示,一种硬的,类似于TCR的结合模式,专注于特定的侧链,这表明减少了目标外相互作用.
- 在in silico选中发现了潜在的异性,但TCR模拟显示了作为T细胞参与者的广泛治疗窗口.
结论:
- 新设计的α-螺旋TCR模拟器可以实现对瘤抗原的高特异性和亲和力.
- 结构洞察力为设计具有改进安全配置文件的TCR模拟器提供了基础.
- 专注于的α-螺旋TCR模拟器代表了精确癌症免疫治疗的有前途的战略.
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