通过聚纳米颗粒激活线粒体复合物I,以抑制免疫治疗的低氧诱导因子-1亚单元α
Ruiling Xu1,2,3, Mingda Zhao1,2, Yuedi Yang1,2
1National Engineering Research Center for Biomaterials, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P. R. China.
ACS nano
|July 21, 2025
概括
这项研究设计了纳米颗粒来促进黑色素瘤细胞的细胞能量生产 (氧化酸化),抑制瘤生长和转移. 这种方法可以增强免疫系统.
科学领域:
- 生物化学 生物化学
- 免疫学 免疫学 免疫学
- 纳米技术 纳米技术
背景情况:
- 线粒体功能障碍通过将新陈代谢转移到糖溶解来促进癌症,有助于瘤免疫逃避.
- 恢复氧化酸化是一种潜在的策略,可以抵消瘤免疫逃逸.
研究的目的:
- 在黑色素瘤中设计PEGylated表甲基酸盐纳米颗粒 (PE-NPs) 来恢复线粒体氧化酸化.
- 评估PE-NP在黑色素瘤模型中的抗瘤和免疫调节作用.
主要方法:
- PE-NP是在可注射的色素凝中设计的.
- 分析了线粒体复合体I活动,NAD+水平和关键信号通路 (MAPK,PI3K-AKT/mTOR).
- 瘤复发,生长和转移被评估在手术切除,副瘤管理和远程转移模型中.
- 评估了免疫细胞群 (CD8+ T细胞,CD4+调节性T细胞,树突细胞) 和记忆T细胞分化.
主要成果:
- PE-NPs通过激活B16F10细胞中的线粒体复合体I来调节氧化酸化.
- 这增加了NAD+水平,抑制了缺氧诱导因子-1并降低了MAPK,PI3K-AKT/mTOR通路和PD-L1表达的调节.
- PE-NPs显著抑制瘤复发,生长和转移,同时促进全身抗瘤免疫力.
- 与PE-NP和PD-1/PD-L1抑制剂的联合治疗显示出增强的免疫疗效.
结论:
- 用PE-NP激活线粒体复合体I可增强氧化酸化,提供一种新的策略来强化黑色素瘤免疫疗法.
- 这种方法通过调节瘤微环境并增强抗瘤免疫反应,有效地抑制瘤的进展和转移.
相关概念视频
Electron Transport Chain: Complex I and II
15.0K
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...
15.0K
The Electron Transport Chain
17.3K
The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...
17.3K


