双层空心Cu2-x/CeO2纳米酶通过电子转移增强反应性氧物种的产生,以有效的瘤治疗
Lili Meng1, Jie Zhang1, Lingxue Tang2
1School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
Journal of colloid and interface science
|October 8, 2025
概括
一种新型纳米酶,Cu2-x/CeO2@ICG,通过促进活性氧物种 (ROS) 生成和通过级联催化和多式治疗克服瘤微环境挑战,增强癌症治疗.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术 纳米技术
- 材料科学 材料科学 材料科学
背景情况:
- 化学动力学疗法 (CDT) 受到低反应性氧物种 (ROS) 生成,短暂的氧化应激和抗氧化瘤微环境 (TME) 的限制.
- 纳米酶对ROS产生有希望,但影响其活动的电子转移机制尚未得到充分探索.
研究的目的:
- 设计一种新的双层空心纳米酶,Cu2-x/CeO2@ICG (CCI),以增强电子转移和TME响应级联催化,以改善癌症治疗.
- 研究CCI纳米酶的多式疗法潜力,结合光热疗法 (PTT),光动力疗法 (PDT) 和CDT.
主要方法:
- 制造一个双层空心纳米酶 (Cu2-x/CeO2@ICG),具有增强的电子转移能力.
- 使用密度函数理论 (DFT) 计算来确认催化活性.
- 在体外和体内实验,以评估纳米酶的治疗疗效和机制.
主要成果:
- 由于其独特的结构和改进的电子转移,CCI纳米酶表现出增强的过氧化酶 (POD),氧化酶 (OXD) 和催化酶 (CAT) 类活动.
- CCI有效地将H2O2/O2转化为ROS (·OH/·O2−),并减轻瘤缺氧,增强PDT和OXD活性.
- 通过Cu2+/Ce4+介导的谷氨 (GSH) 耗尽会破坏ROS-抗氧化剂平衡,提高ROS水平.
- 结合PTT/PDT和CDT实现了持续的ROS积累,显著提高了瘤治疗疗效.
结论:
- 设计的CCI纳米酶通过增强的电子转移和级联催化有效地克服了传统CDT的局限性.
- 这种多模式级联治疗策略表明了癌症治疗的显著临床潜力.
相关概念视频
Cancer Therapies
9.8K
Cancer therapies are various modes of treatment, such as surgery, radiation therapy, and chemotherapy that are administered to cancer patients.
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
However, cancer treatments can pose several challenges, as therapies used to kill cancer cells are generally also toxic to normal cells. Moreover, cancer cells mutate rapidly and can develop resistance to chemical agents or radiation therapy. Besides, all types of cancer cells may not respond to the same therapy. Some cancer cells respond to one...
9.8K
Electron Transport Chain: Complex I and II
18.4K
The mitochondrial electron transport chain (ETC) is the main energy generation system in the eukaryotic cells. However, mitochondria also produce cytotoxic reactive oxygen species (ROS) due to the large electron flow during oxidative phosphorylation. While Complex I is one of the primary sources of superoxide radicals, ROS production by Complex II is uncommon and may only be observed in cancer cells with mutated complexes.
ROS generation is regulated and maintained at moderate levels necessary...
ROS generation is regulated and maintained at moderate levels necessary...
18.4K
Targeted Cancer Therapies
8.6K
The targeted cancer therapies, also known as “molecular targeted therapies,” take advantage of the molecular and genetic differences between the cancer cells and the normal cells. It needs a thorough understanding of the cancer cells to develop drugs that can target specific molecular aspects that drive the growth, progression, and spread of cancer cells without affecting the growth and survival of other normal cells in the body.
There are several types of targeted therapies against...
There are several types of targeted therapies against...
8.6K


