一种生物启发的硫-Fe-heme纳米酶,具有选择性过氧化酶类活性,用于增强瘤化疗
Shuaibing Zhang1,2, Xuejiao J Gao3, Yuanjie Ma3
1Nanozyme Laboratory in Zhongyuan, School of Basic Medical Sciences, Zhengzhou University, Zhengzhou, China.
Nature communications
|December 5, 2024
概括
这项研究开发了一种新型的hemin-cysteine-Fe (HCFe) 纳米酶,具有独特的过氧化酶类活性,用于增强瘤治疗. HCFe纳米酶可以选择性地提高反应性氧物种 (ROS) 的产生,从而提高化疗对抗耐药癌症的疗效.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术 纳米技术
- 癌症治疗 癌症治疗
背景情况:
- 基于铁的纳米酶在瘤治疗中表现有前途,这是由于其生物相容性和类似过氧化酶的活性.
- 然而,它们的双重催化酶类活性通过消耗过氧化和减少基生成,降低了治疗效果.
研究的目的:
- 开发一种具有独特的过氧化酶类活性的新型纳米酶,以克服双功能铁基纳米酶的局限性.
- 研究新纳米酶在癌症治疗中的作用机制和治疗潜力.
主要方法:
- 一种超分子组装方法被用来构建hemin-cysteine-Fe (HCFe) 纳米酶.
- 分析了HCFe的催化活性和选择性,重点关注硫协调的作用.
- 与西斯丁联合使用的HCFe的疗效在体内对抗耐西斯丁的食道状细胞癌 (ESCC) 细胞和异种移植进行了评估.
主要成果:
- HCFe纳米酶表现出独特的过氧化酶类活性,在催化选择性方面超过了天然的过氧化酶.
- 硫与黑中铁原子的协调被确定为调节催化偏好的关键.
- HCFe显著增强了活性氧物种 (ROS) 的产生,并对ESCC细胞和异种移植产生强烈的细胞毒性作用,特别是与西斯相结合时.
结论:
- HCFe纳米酶为基于铁的纳米酶的双重活性提供了一个独特的解决方案.
- 它的选择性过氧化酶类活性增强ROS生成,并增强化疗效.
- 作为多模式癌症治疗的组成部分,HCFe具有显著的潜力,特别是克服ESCC中西斯普拉丁耐药性.
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