由瘤激活的纳米复合体将癌症和巨代谢重编程以相反的方向来克服免疫抑制
Zan Dai1, Qiaoyun Wang2, Ming Zhang3
1Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia; Children's Cancer Institute, School of Medicine and Health, UNSW Sydney, Sydney, 2052, Australia.
Biomaterials
|August 31, 2025
概括
这项研究引入了一种酸激活的纳米复合物,可清除硫化 (H2S),重编程癌细胞和瘤相关的巨细胞代谢,增强抗瘤免疫力并抑制瘤生长.
科学领域:
- 生物医学工程
- 癌症研究
- 免疫学
背景情况:
- 免疫疗法的有效性受到免疫抑制瘤微环境的限制,由癌细胞和瘤相关巨细胞 (TAM) 的独特代谢途径驱动.
- 这些细胞的同步代谢重编程是具有挑战性的,因为它们的代谢需求相反.
研究的目的:
- 开发一种基于纳米材料的新策略,同时调节癌细胞和TAM代谢.
- 研究这种策略在增强抗瘤免疫力和抑制瘤进展方面的治疗潜力.
主要方法:
- 一个酸激活的铁纳米复合物 (FZNC) 被设计成在瘤微环境中转化为尖的FeOOH纳米粒子.
- 使用FZNC选择性地清除硫化 (H2S),这是影响细胞代谢的关键代谢物.
- 分析了癌细胞的新陈代谢转变 (糖分离到OXPHOS) 和TAMs (OXPHOS到糖分离).
- 免疫性,免疫细胞透,瘤生长和转移均在体外和体内进行了评估.
主要成果:
- 在瘤微环境中,FZNC增强了细胞吸收并选择性地耗尽了H2S.
- 实现了双向代谢重编程:癌细胞转向氧化化 (OXPHOS),而TAM转向糖解.
- 这种新陈代谢重编程导致瘤免疫性增加,增强树突细胞成熟,M1极化和细胞毒性T细胞透.
- 治疗FZNC显著抑制瘤生长和转移,显示与PD- L1阻断的协同作用.
结论:
- 开发的FZNC提供了基于材料的方法来协调瘤微环境中的对立代谢程序.
- 这种策略有效增强抗瘤免疫力,并为癌症治疗提供了有前途的治疗途径,特别是在组合疗法中.
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