pH-可激活的基于纳米颗粒的工程选择性hexokinase 2降解剂引起GSDME-依赖的癌症治疗的pyroptosis
Linlin Gong1,2, Shasha Li1,2, Jiahui Sun1,2
1Research & Development Institute of Northwestern Polytechnical University in Shenzhen, Shenzhen 518057, China.
这项研究引入了可以通过pH激活的纳米粒子PROTACs (纳米PROTACs),可以在瘤中选择性降解hexokinase 2 (HK2). 纳米-PROTACs通过触发 pyroptosis 和抑制瘤生长和转移来增强癌症治疗.
科学领域:
- 生物技术是生物技术.
- 纳米医学是一种纳米医学.
- 癌症治疗 癌症治疗
背景情况:
- 针对蛋白质分解的嵌合体 (PROTACs) 提供有针对性的蛋白质降解,但面临着诸如瘤积累和透不良等挑战.
- 传统的PROTACs在有效性上表现出局限性,原因是它们的"始终启动"活动和低于最佳的交付.
- 向特定的蛋白质,如hexokinase 2 (HK2) 对于开发有效的癌症疗法至关重要.
研究的目的:
- 开发一种新的基于纳米粒子的pH可激活的PROTAC (纳米-PROTAC),用于向降解癌症治疗中的HK2.
- 通过增强瘤积累和实现受控释放来克服传统PROTACs的局限性.
- 研究纳米-PROTACs在抑制瘤生长和转移的治疗潜力.
主要方法:
- 基于纳米粒子的工程 PROTACs (纳米-PROTACs) 是通过将基于PEI的 PROTACs与使用酸可分离的cis-aconitic无水化物 (CAA) 键的两性纳米粒子结合而构建的.
- 纳米PROTACs被设计为在酸性瘤微环境中释放PROTACs,准HK2并通过ubiquitin-proteasome系统 (UPS) 招募cereblon (CRBN) 进行无化和降解.
- 纳米-PROTACs的疗效被评估在CT26瘤模型和4T1-luciferase瘤携带的正位素小鼠模型,评估瘤生长抑制,转移预防和热灭菌诱导.
主要成果:
- 纳米PROTACs在酸性瘤微环境中成功释放了PEI-based PROTACs,从而通过UPS进行了针对性的HK2降解.
- 工程化纳米颗粒证明了Gasdermin E (GSDME) 介导的热的特定诱导,增强了抗癌效应.
- 纳米-PROTACs显著抑制CT26瘤生长,并防止瘤进展和肺转移 in vivo.
- 该研究表明,基于纳米粒子的PROTACs在癌症治疗中具有针对性蛋白质降解的潜力.
结论:
- 可pH激活的Nano-PROTACs代表了针对蛋白质降解和癌症治疗的有希望的策略.
- 这种纳米粒子平台克服了传统PROTACs的局限性,通过实现控制释放和增强抗瘤功效.
- 纳米PROTAC显示了在瘤学中推进选择性兴趣蛋白 (POI) 降解策略的潜力.
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