一个瘤微环境响应的自氧化纳米平台,用于双增强型缩和声动态协同免疫疗法
Yikai Tang1, Lei Ge2, Dan Zhu1
1College of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
ACS nano
|November 6, 2025
概括
这项研究引入了一种新的纳米敏感剂,可以克服瘤缺氧,以提高癌症治疗效果. 它有效地结合了声动力学疗法和cuproptosis,显著改善瘤抑制和预防复发.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术纳米技术
- 癌症治疗 癌症治疗
背景情况:
- 瘤微环境 (TME) 缺氧限制了声动力疗法 (SDT) 和cuproptosis的疗效.
- 缺氧减少了SDT中反应性氧物种 (ROS) 的产生,并抑制了用于cuproptosis的线粒体呼吸.
研究的目的:
- 开发一种自氧化纳米敏感剂,以克服缺氧引起的癌症治疗局限性.
- 通过重建TME来协同增强SDT和cuproptosis.
主要方法:
- 设计了一种基于CaO2的纳米敏感剂 (CaO2-MD),其外是基于铜的MOF外,装有二硫 (DSF).
- 在超声波 (US) 照射时,研究了对TME的响应性拆解,用于O2生成和药物释放.
- 在4T1瘤模型中评估了体外和体内疗效,包括与PD-L1阻断的联合治疗.
主要成果:
- CaO2-MD有效地缓解了瘤缺氧,促进了ROS的产生,并释放了铜离子和DSF.
- 超声波触发的CaO2-MD在4T1模型中实现了显著的瘤抑制,治疗率为40%.
- 结合PD-L1阻断的联合治疗将治愈率提高到80%,并建立了持久的免疫记忆.
结论:
- 该CaO2-MD纳米感应剂有效地解决了TME缺氧,增强了SDT和cuproptosis.
- 这种方法通过重建TME,为开发强大的癌症疗法提供了一个有希望的策略.
- 开发的平台显示了在低氧瘤中克服治疗耐药性的潜力.
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