具有空间时间可控NO释放和生物成像行为对RNS增强化学疗法的超分子自组
Yang Bai1, Yani Suo1, Qingqing Shang1
1Shaanxi Key Laboratory of Chemical Additives for Industry, College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xi'an 710021, China.
Biomacromolecules
|August 20, 2025
概括
这项研究引入了一种用于癌症治疗的光激活纳米载体. 它精确释放氧化 (NO),并产生活性氧物种 (ROS),以改善瘤治疗和成像.
科学领域:
- 生物医学工程
- 纳米技术
- 癌症治疗方法
背景情况:
- 基于反应性物种 (RNS) 的癌症治疗具有前景,但由于寿命短且释放不受控制,氧化 (NO) 和超氧化 (•O2-) 输送面临挑战.
- 这些反应性物种的有效配送和时空控制对于提高治疗效果至关重要.
研究的目的:
- 在癌症治疗中开发光激活的超分子治疗系统,用于精确的NO释放和化学动力学治疗 (CDT).
- 整合光成像以实时监测治疗过程.
- 通过涉及NO和活性氧物种 (ROS) 的级联反应扩大瘤细胞的损伤.
主要方法:
- 用光响应的NO捐赠体 (Fc-NAp-NO) 将β-环氧化移植的酸 (HA-CD) 自组装成纳米载体.
- 用阿斯科比尔棕酸盐 (PA) 装载纳米载体,为CDT提供过氧化 (H2O2).
- 使用光照射触发NO释放,启动CDT,并启动光成像.
主要成果:
- 通过光照射实现了对NO释放的时空控制.
- 光成像技术的成功整合
- 通过CDT生成基 (•OH) 和超氧化 (•O2-),其中•O2-与NO反应形成细胞毒性过氧化 (ONOO-).
- 扩大RNS/ ROS诱导的瘤细胞损伤,导致治疗效果的增强.
结论:
- 开发的光激活纳米载体系统可实现精确,成像导向和级联增强的瘤治疗.
- 通过控制NO和ROS的释放和反应,该平台克服了基于RNS的传统治疗的局限性.
- NO,ROS和ONOO- 的协同作用显著提高了癌症治疗的有效性.
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