低氧/ROS/pH三重响应货物释放的金属有机框架
Wenyu Chen1, Huixin He1, Pengfei Jiao1
1School of Pharmacy, Bengbu Medical College, Bengbu, Anhui, 233000, China.
Advanced healthcare materials
|August 17, 2023
概括
这项研究引入了用于增强光动力学治疗 (PDT) 的三重响应金属有机框架 (MOF). MOF在需求时释放光敏剂,通过克服反应性氧物种 (ROS) 的限制来提高抗瘤疗效.
科学领域:
- 生物材料科学 生物材料科学
- 纳米技术 纳米技术
- 癌症治疗 癌症治疗
背景情况:
- 光动力疗法 (PDT) 面临着短时间的活性氧物种 (ROS) 寿命和有限的扩散距离的挑战.
- 开发有效的药物输送系统对于提高PDT疗效至关重要.
研究的目的:
- 为触发光敏剂释放设计一个低氧/ROS/pH三重响应的金属有机框架 (MOF).
- 通过解决ROS扩散和寿命的局限性,提高PDT的抗瘤疗效.
主要方法:
- 合成了一种以为基础的MOF,与e6 (Ce6) 光敏剂封装在一起,使用含有的伊米达连接剂.
- 研究了MOF对低氧 (通过阿佐降解),酸性pH (通过伊米达电离) 和ROS (通过伊米达氧化) 的反应.
- 评估了这些触发剂对光敏剂释放和PDT疗效的协同效应.
主要成果:
- 亚组在低氧条件下减少了抗氧化剂 (GSH,Trx) 的耗尽,促进了快速的货物释放.
- 在酸性有机体中的伊米达电离促进了 lysosomal 逃逸和 Ce6 释放.
- 由ROS诱导的伊米达氧化进一步增强了货物的释放,证明了协同效应.
- 三重响应系统改善了光敏剂释放率,并增强了PDT治疗.
结论:
- 三重响应的纳米载体为PDT中触发光敏剂释放提供了一个有希望的策略.
- 这种方法有效地克服了与抗瘤PDT中ROS相关的局限性.
- 开发的MOF系统显示了改善癌症治疗结果的潜力.
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