针对OXPHOS的纳米颗粒用于增强光动力疗法对抗瘤缺氧
Yujuan Gao1, Yunhao Li2, Zian Pan1
1CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, National Center for Nanoscience and Technology, No. 11 First North Road, Zhongguancun, Beijing, 100190, People's Republic of China; University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
International journal of pharmaceutics
|March 3, 2024
概括
这项研究开发了一种新的纳米平台来对抗瘤缺氧,增强光动力疗法 (PDT) 的有效性. 该纳米平台使用氧化酸化抑制剂来增加对活性氧物种 (ROS) 生产的氧气可用性,改善瘤根除.
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:
- 瘤缺氧限制了光动力学治疗 (PDT) 的疗效,原因是反应性氧物种 (ROS) 生成的氧气不足.
- 氧化酸化 (OXPHOS) 是瘤细胞中消耗氧气的关键过程.
- 线粒体是ROS诱导的损伤和ATP生产的关键目标.
研究的目的:
- 开发一种能减轻瘤缺氧并提高PDT疗效的纳米平台.
- 研究OXPHOS抑制剂在改善ROS生产的氧气可用性方面的作用.
- 评估新型纳米平台的线粒体向和抗瘤效应.
主要方法:
- 在mPEG-PLGA中制造三素 (TPP) 修饰的纳米载体,封装IR780 (光敏剂) 和atovaquone (ATO,OXPHOS抑制剂).
- 利用TPP有针对性地将ATO输送到线粒体,抑制OXPHOS并减少氧气消耗.
- 在线粒体内使用IR780来增强ROS生成,并在光激活时诱导亡.
主要成果:
- 纳米平台 (TNPs/IA) 在线粒体中展示了精确的亚细胞局部化.
- 通过ATO抑制OXPHOS导致ATP生产减少和线粒体损伤.
- 通过氧增强PDT,TNP/IA显著增强了HeLa皮下异种移植模型中的抗瘤疗效.
结论:
- 开发的纳米平台通过抑制线粒体OXPHOS.有效地缓解瘤缺氧.
- 用光敏感剂和OXPHOS抑制剂对线粒体进行向,为增强PDT提供了一个有希望的策略.
- 这种方法代表了光动力瘤根除的潜在进步.
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