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Li J, Zhu Z, Zhang M, Zhang Q, Sun W, Wang Y, Jiang L, Guo Z, Wang Y, Liu S, Huang J, Yu J. Target-manipulated drawstring DNAzyme for ultrasensitive detection of UDG using Au@Ag NRs indicator. Anal Chim Acta 2022; 1218:340010. [PMID: 35701040 DOI: 10.1016/j.aca.2022.340010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2022] [Revised: 05/15/2022] [Accepted: 05/26/2022] [Indexed: 11/01/2022]
Abstract
Uracil-DNA glycosylase (UDG) is a common glycosylase that can expressly recognize and remove damaged uracil bases, and the ultrasensitive detection of which is significant to maintain genomic stability and early clinical diagnosis of disease. Herein, we proposed a sensitive colorimetric sensing platform to detect UDG. Combined with target-manipulated drawstring DNAzyme and Au@Ag nanorods (Au@Ag NRs) indicator, we achieved in naked-eyes observation and ultrasensitive detection of UDG. Briefly, when the UDG exists, the dynamic reaction of rope pulling will occur generating the active conformation of DNAzyme. The cutting effect will be further produced when we add Mg2+, thus the generated trigger chain can mediate the occurrence of CHA reaction, followed by generating amount of ·OH which can etch Au@Ag NRs causing the shifted of localized surface plasmon resonance (LSPR) peak. By contrast, there is no obvious shift of LSPR peak. This strategy shows extraordinary specificity and sensitivity toward UDG providing a detection limit of 4.6 × 10-5 U mL-1. By using of this method, we detected UDG specifically in complex samples, proving that it's potential applications in biomedical research and clinical diagnosis are fantastic.
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Affiliation(s)
- Jingjing Li
- College of Biological Sciences and Technology, University of Jinan, Jinan, 250022, PR China
| | - Zhixue Zhu
- College of Biological Sciences and Technology, University of Jinan, Jinan, 250022, PR China
| | - Manru Zhang
- Shandong Institute of Medical Device and Pharmaceutical Packaging Inspection, Jinan, 250101, PR China
| | - Qingxin Zhang
- School of Water Conservancy and Environment, University of Jinan, Jinan, 250022, PR China
| | - Wenyu Sun
- College of Biological Sciences and Technology, University of Jinan, Jinan, 250022, PR China
| | - Yeru Wang
- College of Biological Sciences and Technology, University of Jinan, Jinan, 250022, PR China
| | - Long Jiang
- School of Water Conservancy and Environment, University of Jinan, Jinan, 250022, PR China
| | - Zhiqiang Guo
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
| | - Yu Wang
- College of Biological Sciences and Technology, University of Jinan, Jinan, 250022, PR China
| | - Su Liu
- School of Water Conservancy and Environment, University of Jinan, Jinan, 250022, PR China
| | - Jiadong Huang
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China.
| | - Jinghua Yu
- Key Laboratory of Chemical Sensing & Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan, 250022, PR China
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