协同光动力学和化学动力学疗法使用低氧适应性Ce6@Co纳米颗粒来增强瘤抑制
Yeji Chang1, Yong Geun Lim1, Kyeongsoon Park1
1Department of Systems Biotechnology, Chung-Ang University, Anseong, Gyeonggi 17546, Republic of Korea.
International journal of pharmaceutics: X
|July 10, 2025
概括
新的Ce6@Co纳米粒子在固体瘤的光动力疗法 (PDT) 中克服了氧气依赖. 这种双重作用的方法通过PDT和化学动力学疗法 (CDT) 产生活性氧物种 (ROS),即使在低氧条件下也能有效治疗瘤.
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:
- 传统光动力学疗法 (PDT) 的疗效在缺氧固体瘤中是有限的,因为依赖氧气.
- 疏水性光敏剂通常具有较差的水溶性,阻碍了配方和输送.
- 低氧瘤微环境对依赖氧气的癌症治疗构成重大挑战.
研究的目的:
- 开发一个缺氧适应性纳米平台,用于增强癌症治疗.
- 通过依赖氧和依赖氧的途径产生反应性氧物种 (ROS) 的纳米粒子.
- 为了研究光动力学和化学动力学治疗 (PDT-CDT) 在缺氧固体瘤中的协同效应.
主要方法:
- 通过与e6 (Ce6) 协调CO2+离子,合成Ce6@Co纳米粒子.
- 纳米粒子大小,分散性和合体稳定性的表征.
- 在体外评估细胞吸收,ROS生成和癌细胞在正常和缺氧条件下的活力.
- 瘤携带小鼠的抗瘤疗效和全身毒性的体内评估.
主要成果:
- Ce6@Co纳米颗粒显示出统一的尺寸 (~230 nm),增强的分散性和稳定性.
- 纳米粒子通过PDT产生双模式ROS:II型1O2,通过芬顿式反应产生氧独立的OH.
- 在体外研究表明,由于PDT-CDT协同作用和亡诱导,SCC7细胞活力显著降低 (34.4%的诺摩西亚,20.48%的缺氧).
- 在体内给药完全抑制了SCC7携带小鼠的瘤,没有观察到系统性毒性.
结论:
- Ce6@Co纳米颗粒代表了一个低氧适应性纳米平台,可以在PDT中克服氧气依赖.
- 协同的PDT-CDT方法有效地针对缺氧固体瘤.
- 这种双模治疗策略为治疗具有挑战性的固体瘤提供了安全而有效的选择.
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