双金属 PtPd 原子集群作为通过异质催化过程的抗新生治疗的亡/亡诱导剂
Xiaoqin Wang1, Mengting He1, Yinmin Zhao1
1School of Materials and Energy, Southwest University, Chongqing 400715, China.
ACS nano
|March 8, 2024
概括
双金属-原子集群 (BAC) 通过产生活性氧物种 (ROS) 和促进细胞死亡来对抗瘤. 这种新的异质催化方法增强了抗瘤免疫力,并抑制了转移.
科学领域:
- 纳米技术 纳米技术
- 材料科学 材料科学 材料科学
- 生物医学工程 生物医学工程
- 催化剂是一种催化剂.
背景情况:
- 多金属原子集群可以在瘤微环境中启动异构的催化反应.
- 反应产物可以损害癌细胞的代谢功能,提供治疗机会.
- 瘤缺氧是癌细胞入侵和治疗耐药性的关键因素.
研究的目的:
- 构建用于抗瘤治疗的双金属-原子集群 (BAC).
- 为了利用BAC的异质催化活性来治疗癌症.
- 研究BAC诱导瘤细胞死亡和刺激抗瘤免疫力的机制.
主要方法:
- 通过纳米粒子剥离在添加碳上合成双金属 PtPd 原子集群 (BAC).
- 用聚乙烯糖醇 (PEGylation) 修改BAC的表面.
- 在体外和体内评估BAC的催化酶模仿和过氧化酶模仿活动.
- 评估ROS生成,亡,铁亡和免疫细胞死亡的诱导.
主要成果:
- BAC有效地将内源性过氧化 (H2O2) 分解成氧气 (O2),缓解瘤缺氧.
- BAC催化超氧化基 (O2−) 和基 (OH) 的形成,导致氧化应激和亡.
- BAC表现出类似谷氨过氧化酶的活性,促进脂质过氧化和铁,同时还诱导免疫细胞死亡.
- 生成的ROS和铁致死会导致显著的细胞损伤,并刺激抗瘤免疫力,抑制转移.
结论:
- PEGylated双金属 PtPd原子集群 (BAC) 是通过异质催化在抗瘤疗法中有效的.
- BAC通过ROS生成,铁亡和免疫细胞死亡诱导癌细胞死亡,同时缓解瘤缺氧.
- 这项研究为设计用于疾病治疗和刺激抗瘤免疫力的多金属原子集群提供了一个有希望的范式.
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