具有增强反应性氧物种生成的体量子点,用于通过脱离离子化通过过氧化进行光动力学治疗
Zheng Wang1, Kaijie Zhu2, Dongliang Hu2
1School of Chemistry and Materials Science, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China; State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Journal of colloid and interface science
|July 17, 2025
概括
体量子点 (QD) 通过产生活性氧物种 (ROS) 来增强光动力疗法 (PDT). 氧化在瘤中增强了基于QD的ROS生成和癌症治疗疗效.
科学领域:
- 材料科学 材料科学 材料科学
- 生物医学工程 生物医学工程
- 摄影化学的使用.
背景情况:
- 体量子点 (QD) 是光动力学疗法 (PDT) 的前景,因为它具有可调节的特性和反应性氧物种 (ROS) 的产生.
- 瘤微环境,通常过度表达过氧化 (H2O2),可以影响PDT中的QD性能.
研究的目的:
- 研究H2O2对QD驱动的ROS生成和PDT疗效的影响.
- 阐明 QDs 通过 H2O2 增强的 ROS 生产背后的光物理机制.
主要方法:
- 合成高质量的水溶性QDs,具有高光发光量子产量 (PL QY).
- 谱分析 (光电化/脱电化) 用于研究 QD 激发状态动态.
- 在体外癌细胞研究以评估治疗疗效和成像能力.
主要成果:
- H2O2显著增强了光激发QDs的ROS生成,超过了氧气的作用.
- 光谱证据表明H2O2参与激发状态电子转移,促进ROS的形成.
- QDs证明了在H2O2.2.存在的情况下改善了体外癌症治疗疗效和精确的瘤成像.
结论:
- H2O2在调节QD光物理方面起着至关重要的作用,以增强ROS生成.
- 在富含H2O2的瘤环境中,基于QD的PDT疗效显著提高.
- 这些发现推动了下一代基于QD的PDT剂的开发.
相关概念视频
Oxidation of Phenols to Quinones
3.5K
In the presence of oxidizing agents, phenols are oxidized to quinones. Quinones can be easily reduced back to phenols using mild reducing agents. The electron-donating hydroxyl group enhances the reactivity of the aromatic ring, enabling oxidation of the ring even in the absence of an α hydrogen.
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
o-hydroxy phenols are oxidized to o-quinones and p-hydroxy phenols to p-quinones. Such redox reactions involve the transfer of two electrons and two protons. The reversible redox...
3.5K
Peroxisomes
14.4K
Peroxisomes are specialized organelles present in fungi, plant, and animal cells. It can vary in number, size, morphology, and activity depending on the type of tissue and the nutritional state of the cell. For example, cells with active lipid metabolism, such as adipocytes, neurons, and hepatocytes, have more peroxisomes than other cells in the body. Besides their primary role in breaking down complex organic molecules, peroxisomes can also synthesize specific macromolecules and participate in...
14.4K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide
10.8K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
10.8K


