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基于DNAzyme正反循环的双核3DDNA纳米机器,用于活细胞中高度敏感的MicroRNA成像

Jinshen Li¹, Shixiu Xiao¹, Xin Wang¹

¹State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China), School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin, 541004, China.

|March 21, 2024

概括

一种新的DNA步行器纳米机器使用DNA酶反循环检测微RNA-21 (miRNA-21). 这项技术使敏感的体外检测和细胞内成像能够用于早期癌症诊断.

科学领域:

纳米技术纳米技术
分子生物学分子生物学
生物医学工程生物医学工程

背景情况:

微RNAs (miRNAs) 是疾病诊断的关键生物标志物.
现有的检测方法往往缺乏灵敏度或需要复杂的程序.
开发有效的miRNA检测工具对于早期疾病查至关重要.

研究的目的:

构建一个双 3D DNA 步行器纳米机器,用于敏感的 miRNA 检测.
为了利用DNAzyme自动驱动的正反循环进行信号放大.
为了使miRNA-21.1.的体外检测和细胞内成像能够实现.

主要方法:

设计了一个使用两个金纳米粒子作为反应核心的DNA步行器纳米机器.
使用空间限制效应和正反循环来提高反应效率.
光恢复被用来量化miRNA-21的存在.
该系统在细胞溶解物上进行了测试,并用于细胞内成像.

主要成果:

该DNA步行器纳米机实现了线性检测范围为0.5-60 pmol/L的miRNA-21.
获得了0.41 pmol/L (S/N=3) 的低检测极限.
在细胞溶解物中成功检测出miRNA-21.
细胞内光成像将瘤细胞与正常细胞区分开来.

结论:

开发的DNA步行器纳米机器为miRNA-21检测提供了一个敏感和高效的平台.
在体外检测和细胞内成像的组合为癌症标志物分析提供了双重方法.
这项技术有望通过多途径检测进行早期疾病诊断和查.

关键词:

在DNAzyme的积极反循环中.双 3D DNA 步行者光成像成像的使用方法活细胞是指活细胞.这是一个小RNARNA.

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