一种向细胞因子受体的仿真体 (kineTAC) 工具箱,用于扩大细胞外向蛋白质降解的范围
Kaan Kumru1, Zi Yao1, Brandon B Holmes2,3
1Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, CA, USA.
bioRxiv : the preprint server for biology
|September 15, 2025
概括
这项研究扩展了细胞因子受体向嵌合体 (kineTACs) 工具箱,使得特定细胞中的向细胞外蛋白降解 (eTPD) 成为可能. 新的 kineTACs 为治疗应用提供了增强的功效和多功能性.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药物发现 药物发现 药物发现
背景情况:
- 细胞外向蛋白降解 (eTPD) 为操纵细胞外蛋白质组提供了一种新的方法.
- 目前的eTPD方法通常依赖于广泛表达或肝脏受限受体,限制其特异性.
- 针对细胞因子受体的仿真体 (kineTACs) 使用与抗体结合的天然配体,通过CXCR7引导蛋白质降解.
研究的目的:
- 通过创建新的变体来显著扩展 kineTAC 工具箱.
- 探索这些新 kineTACs 对细胞类型选择性 eTPD 的潜力.
- 调查 kineTACs 在增强抗体药物合剂性能方面的实用性.
主要方法:
- 基于细胞因子,化学因子和生长因子构建了81种新的 kineTAC.
- 对 kineTACs 的表达分析,以评估它们是否适合进一步研究.
- 与现有结构相比,对 kineTAC 的结合亲和力和强度的评估.
- 评估 kineTAC 内化能力及其对抗体药物合物的影响.
主要成果:
- 在新建的81个 kineTAC 中,有55个在没有优化的情况下以合适的水平表达.
- 许多 kineTAC 向具有独特细胞类型表达特征的受体,从而实现特定的 eTPD.
- 几种新的 kineTAC 显示出比原来的基于CXCL12的 kineTAC 有更高的功效.
- 证明KineTAC的内部化能力可以提高抗体药物合剂的性能.
结论:
- 扩展的 kineTAC 工具箱为遗传编码,细胞类型选择性 eTPD.提供了多功能工具.
- 这些新型 kineTACs 提供了更好的功效和更广泛的适用于治疗策略.
- 这些发现表明, kineTACs对于优化eTPD和扩大其在向治疗中的使用可能是有价值的.
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