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Analytica chimica acta. 2023 Jul 4:1263:341241. doi: 10.1016/j.aca.2023.341241 Q16.02025

A triple amplification strategy using GR-5 DNAzyme as a signal medium for ultrasensitive detection of trace Pb2+ based on CRISPR/Cas12a empowered electrochemical biosensor

一种基于CRISPR/Cas12a的电化学生物传感器,利用GR-5 DNAzyme作为信号介质进行超灵敏检测痕量Pb~(2+)的三重放大策略 翻译改进

Yuanyuan Yue  1, Songtao Wang  2, Qiang Jin  3, Nan An  1, Lina Wu  4, He Huang  5

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作者单位

  • 1 School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, China.
  • 2 National Engineering Research Center of Solid-state Brewing, Luzhou, 646000, China.
  • 3 Nantong Cigarette Filter Co., Ltd., Nantong, Jiangsu, 226014, China.
  • 4 School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, China; The Key Research Project of Zhejiang Laboratory, China. Electronic address: wuln@njnu.edu.cn.
  • 5 School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, 210023, China; Food Laboratory of Zhongyuan, Luohe, 462300, Henan, China. Electronic address: huangh@njnu.edu.cn.
  • DOI: 10.1016/j.aca.2023.341241 PMID: 37225346

    摘要 中英对照阅读

    Lead ions (Pb2+) are a well-known toxic heavy metal that poses a significant threat to human health. Therefore, the development of a simple and ultrasensitive technique for detecting Pb2+ is essential. With their trans-cleavage properties, the newly discovered CRISPR-V effectors have become a potential high-precision biometric tool. In this regard, a CRISPR/Cas12a-based electrochemical biosensor (E-CRISPR) has been developed, which is combined with the GR-... ...点击完成人机验证后继续浏览

    铅离子(Pb2+)是一种众所周知的有毒重金属,对人类健康构成重大威胁。因此,开发一种简单且超灵敏的技术来检测Pb2+是非常重要的。由于其反向切割特性,新发现的CRISPR-V效应子已成为潜在的高精度生物测定工具。在这方面,已经开发出了一种基于CRISPR/Cas12a的电化学生物传感器(E-CRISPR),并与能够特异性识别Pb2+的GR-5 DNAzyme结合使用。在这种策略中,GR-5 DNAzyme充当信号介导中介,可以将Pb2+转化为核酸信号,从而成为单链DNA,触发链置换扩增(SDA)反应。这与随后激活的CRISPR/Cas12a对电化学信号探针的切割相结合,实现了协同信号放大,以实现超灵敏的Pb2+检测。所提出的方法检出限低至0.02 pM。因此,我们开发了一种使用GR-5 DNAzyme作为信号媒介(称为SM-E-CRISPR生物传感器)的E-CRISPR检测平台。这为CRISPR系统通过使用媒介转换信号提供了特异性检测非核酸物质的方法。

    关键词:
    CRISPR生物传感器;GR-5 DNAzyme;Pb(2+);信号介导;链置换扩增。


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    期刊名:Analytica chimica acta

    缩写:ANAL CHIM ACTA

    ISSN:0003-2670

    e-ISSN:1873-4324

    IF/分区:6.0/Q1

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    A triple amplification strategy using GR-5 DNAzyme as a signal medium for ultrasensitive detection of trace Pb2+ based on CRISPR/Cas12a empowered electrochemical biosensor