光动力疗法
前药
光敏剂
化学
单线态氧
体内
药物输送
化学发光
右旋糖酐
纳米医学
活性氧
过氧化氢
阿霉素
药理学
组合化学
化疗
光化学
纳米技术
纳米颗粒
材料科学
生物化学
有机化学
氧气
医学
生物技术
外科
生物
作者
Chendi Ding,Zhaoqing Shi,Meitong Ou,Yingbang Li,Li Jiau Huang,Wenyan Wang,Qili Huang,Meihang Li,Chunbo Chen,Xiaowei Zeng,Hongzhong Chen,Lin Mei
标识
DOI:10.1016/j.carbpol.2023.121192
摘要
Natural polysaccharides, represented by dextran, chitosan, and hyaluronic acid, are widely approved for use as pharmaceutical excipients and are important carrier materials for the design of advanced drug delivery systems, particularly in the field of anticancer drug delivery. The combination of stimuli-activable prodrug based chemotherapy and photodynamic therapy (PDT) has attracted increasing attention. Recent studies have verified the effectiveness of this strategy in the treatment of multiple aggressive cancers. However, in such combination, the stimuli-responsive chemotherapy and PDT have their own problems that need to be overcome. The uneven distribution of endogenous stimuli within tumor tissues makes it difficult for prodrug to be completely activated. And the inadequate tissue penetration depth of external light results in low efficiency of PDT. Aiming at these two bottlenecks, we designed a biocompatible dextran based - multi-component nanomedicine (PCL-NPs) that integrate a chemiluminescence agent luminol, a photosensitizer chlorine e6 (Ce6), and a reactive oxygen species (ROS)-activable thioketal-based paclitaxel (PTX) prodrug. The presence of overexpressed hydrogen peroxide (H2O2) inside tumor oxidizes the luminol moiety to generate in-situ light for PDT through chemiluminescence resonance energy transfer (CRET). The singlet oxygen (1O2) produced in this process not only directly kills tumor cells but also amplifies oxidative stress to accelerate the activation of PTX prodrug. We propose that the PCL-NPs have great therapeutic potential by simultaneously enhancing chemotherapy and PDT in a combination therapy.
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