用DNA工程涂层来保护生物系统中纳米酶的催化活性
Lei Ren1,2,3, Xia Liu3,4, Shuai Tang3
1Division of Physical Biology, CAS Key Laboratory of Interfacial Physics and Technology, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China.
Biosensors
|April 25, 2025
概括
DNA涂层的纳米颗粒在生物流体中保持着它们的催化活性. 这种DNA涂层可以防止聚合和蛋白质干扰,从而使血清中敏感的microRNA检测成为先进的诊断.
科学领域:
- 纳米技术 纳米技术
- 生物技术是生物技术.
- 催化剂是一种催化剂.
背景情况:
- 纳米酶和金属纳米粒子一样,在诊断和治疗方面具有潜力.
- 挑战包括在生物环境中纳米酶聚合和失活.
研究的目的:
- 为纳米粒子 (PtNPs) 开发一种DNA工程涂层,以保持它们在复杂的生物环境中的催化活性.
- 为了提高纳米酶的稳定性和功能,用于诊断应用.
主要方法:
- 通过金属硫键,涂层纳米颗粒与醇修饰的单链DNA.
- 在高盐条件下评估纳米粒子聚合.
- 评估血清中的催化活性和蛋白质吸附.
- 在血清样本中展示微RNA检测.
主要成果:
- 在高盐条件下,DNA涂层有效地防止了纳米粒子聚合.
- 涂层保持了纳米颗粒在血清中的固有过氧化酶类活性,通过防止蛋白质吸附,同时允许基质访问.
- 在血清中检测微RNA的敏感检测极限为1 femtomolar (fM).
结论:
- 基因工程纳米酶涂层提供了一个强大的战略,以稳定纳米酶在复杂的生物介质.
- 这种方法保留了纳米酶的催化活性,使敏感的分子诊断成为可能.
- 该方法为开发先进的基于纳米酶的诊断工具提供了一个多功能平台.
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