多刺激激活的PROTAC前药物用于控制的蛋白质降解,增强治疗效果
Tianyang Zhou1, Yibo Gao1, Bohan Ma1
1Department of Urology, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710061, China.
European journal of medicinal chemistry
|January 20, 2026
概括
新的PROTAC前药被瘤微环境刺激激活,增强选择性并降低毒性. 这种方法将向蛋白质降解与自我放大光动力学疗法相结合,以获得卓越的抗瘤效果.
科学领域:
- 生物化学 生物化学
- 药用化学 医学化学
- 在瘤学瘤学.
背景情况:
- 向蛋白质分解的仿真体 (PROTACs) 提供向蛋白质降解,但由于系统性毒性和瘤选择性差,面临临临床挑战.
- 目前的PROTAC疗法可能会导致剂量限制的副作用,因此需要改进瘤特定激活的策略.
研究的目的:
- 设计和验证一种多刺激响应的PROTAC前药物,用于瘤选择性激活.
- 通过控制药物释放来缓解系统性毒性并增强PROTACs的抗瘤疗效.
主要方法:
- 开发了一种具有ROS/GSH可切割链接剂的PROTAC前药物,掩盖一个VHL配体基组.
- 用甲蓝 (NZ-BRD, NZ-AR) 进行概念验证研究的 BRD4 和 AR PROTACs.
- 研究了瘤微环境刺激 (ROS,GSH) 的前药激活,并评估了光动力学治疗的协同效应.
主要成果:
- 这些前药物被与瘤相关的刺激有效地激活,释放功能性PROTACs,在前列腺癌细胞中选择性降解BRD4和AR.
- 释放的甲基蓝作为自我放大光敏剂,促进ROS生成和前药物裂解.
- 由于蛋白质降解和光动力学治疗的协同组合,PROTAC前期药物在体外和体内表现出卓越的抗瘤疗效.
结论:
- 为PROTACs建立了一个时空控制的药物激活范式.
- 证明ROS增强激活与精密蛋白质降解相结合,为克服传统PROTAC疗法的全身毒性提供了一个有希望的策略.
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