通过可逆电子站连接的双活性中心作为多功能纳米酶,用于诱导针对瘤的协同增强级联催化
Qi Zhao1, Lirong Zheng2, Yixuan Gao1
1Key Laboratory of Radiopharmaceuticals, Ministry of Education, College of Chemistry, Beijing Normal University, Beijing 100875, China.
这项研究引入了一种新型纳米酶, 它有效地产生了针对癌症治疗的活性氧物种,对健康细胞的伤害最小.
科学领域:
- 生物医学工程
- 纳米技术
- 癌症治疗
背景情况:
- 纳米酶对反应性氧物种 (ROS) 介导的癌症治疗具有前景,但面临瘤微环境 (TME) 的限制.
- 瘤缺氧和高谷氨 (GSH) 在TME可以降低治疗效果并引起副作用.
研究的目的:
- 开发一种胺功能化纳米酶 (A-Pd@MoO3-x NH),以克服与TME相关的挑战,以改善癌症治疗.
- 利用纳米的双面面进行协同催化活动和ROS生成.
主要方法:
- 具有双催化位点 (Pd{11}和Pd{100}) 的APTAMER功能化的Pd@MoO3-x纳米 (A-Pd@MoO3-x NH).
- 研究了纳米酶催化级联反应的能力,克服瘤缺氧,降解GSH.
- 探索MoO3-x作为可逆电子站的作用,以增强催化活性.
主要成果:
- 通过催化反应产生细胞毒性超氧化基,A-Pd@MoO3-x NH纳米酶有效地解决了瘤缺氧问题.
- 纳米酶降解了过度表达的GSH,防止了ROS的非治疗性消耗.
- 双重活性部位和MoO3- x协同作用增强了ROS生成和瘤细胞杀死,同时节省了正常细胞.
结论:
- A-Pd@MoO3-x NH纳米酶为克服癌症治疗中的TME限制提供了一个有前途的策略.
- 这种双重功能纳米酶可以选择性地根除瘤细胞,并有可能减少副作用.
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