HSP70交互原子介导的蛋白解向基默拉 (HSP70-PROTAC) 用于铁死驱动的癌症治疗
Jinyun Dong1, Yulong Li1, Hui Liang1
1Center for Innovative Drug Research, Hangzhou Institute of Medicine (HIM), Chinese Academy of Sciences, Hangzhou, Zhejiang, 310022, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|December 12, 2025
概括
这项研究介绍了HSP70-PROTACs,这是一种针对向蛋白质降解的新型治疗方法. 这些分子有效地消除了引起疾病的蛋白质,如GPX4和BRD4,在癌症治疗和克服抗药性方面显示出前途.
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:
- 向蛋白质降解 (TPD) 提供了一种新的治疗策略,利用细胞机械消除引起疾病的蛋白质.
- 传统的蛋白质分解向嵌合体 (PROTACs) 依赖于特定的E3结合酶,限制了它们的应用范围,并可能导致耐药性.
研究的目的:
- 设计和评估第一个针对向蛋白质降解的HSP70交互原子介导蛋白质溶解向嵌合体 (HSP70-PROTAC).
- 为了证明HSP70-PROTACs在通过全方位素-蛋白质体降解 (UPS) 和伴侣介导自 (CMA) 降解细胞内蛋白质的降解效果.
- 探索HSP70-PROTACs在克服与传统PROTACs相关的抵抗机制方面的潜力.
主要方法:
- 开发一种HSP70-PROTAC分子 (GDAz-3),旨在劫持热冲击相关蛋白70 (Hsc70) 复合体,并准谷二氧化酶4 (GPX4).
- 在体外评估GDAz-3在降解HT1080细胞中的GPX4并触发铁亡的疗效.
- 在HT1080异种移植小鼠模型中体内评估GDAz-3的瘤抑制作用.
- 通过在癌细胞中降解含原蛋白蛋白4 (BRD4) 来证明HSP70-PROTAC的多功能性.
- 在细胞中评估GDAz-3的降解效率,这些细胞的VHL表达有变化或没有变化.
主要成果:
- 在HT1080细胞中,GDAz-3强烈且快速降解GPX4,诱导选择性铁亡.
- 在小鼠模型中,GDAz-3表现出显著的瘤抑制,没有明显的毒性.
- HSP70-PROTACs通过在癌细胞中有效降解内源BRD4来证明其多功能性.
- 通过GDAz-3降解GPX4在VHL减少或不存在的细胞中是有效的,这表明其适用性比传统的PROTACs更广泛.
结论:
- HSP70-PROTACs代表了针对蛋白质降解的新和可行的策略.
- 这种方法有效地利用HSP70互动组进行治疗性蛋白质清除.
- HSP70-PROTACs为克服耐药性和扩大TPD疗法的范围提供了一个有希望的途径.
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