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Niu X, Lu C, Su D, Wang F, Tan W, Qu F. Construction of a Polarity-Switchable Photoelectrochemical Biosensor for Ultrasensitive Detection of miRNA-141. Anal Chem 2021; 93:13727-13733. [PMID: 34596402 DOI: 10.1021/acs.analchem.1c03460] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
As an early-stage tumor biomarker, microRNA (miRNA) has clinical application potential and its sensitive and accurate detection is significant for early tumor diagnosis. In this study, a photoelectrochemical (PEC) biosensing platform was fabricated for ultrasensitive miRNA-141 detection, which is based on a photocurrent polarity-switchable system using CdS quantum dots (QDs) in the presence of a 5,10,15,20-tetrakis (4-aminophenyl)-21H,23H-porphine (Tph-2H)-coated glassy carbon electrode (GCE). As an excellent photoactive material, Tph-2H has a narrow band gap that effectively gathers photoelectrons under visible light irradiation and improves the transfer ability of photogenerated electrons. Further, the detection sensitivity of miRNA-141 could be significantly improved by combining an enzyme-assisted recycle amplification reaction and a magnetic bead-based separation strategy. The proposed photocurrent polarity-switchable PEC biosensor could efficiently eliminate the false-positive or false-negative signals and achieve a wide linear response range from 1 fM to 1 nM with a low detection limit of 0.33 fM for miRNA-141, providing a potentially alternative solution for detecting other biomarkers in bioanalysis and clinical diagnosis.
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Affiliation(s)
- Xiankang Niu
- Department of Pathology, Cancer Hospital of the University of Chinese Academy of Sciences, Institute of Basic Medicine and Cancer, Chinese Academy of Sciences, Hangzhou 310022, Zhejiang, China.,College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Changtong Lu
- College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Dan Su
- Department of Pathology, Cancer Hospital of the University of Chinese Academy of Sciences, Institute of Basic Medicine and Cancer, Chinese Academy of Sciences, Hangzhou 310022, Zhejiang, China
| | - Fang Wang
- College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
| | - Weihong Tan
- Department of Pathology, Cancer Hospital of the University of Chinese Academy of Sciences, Institute of Basic Medicine and Cancer, Chinese Academy of Sciences, Hangzhou 310022, Zhejiang, China
| | - Fengli Qu
- Department of Pathology, Cancer Hospital of the University of Chinese Academy of Sciences, Institute of Basic Medicine and Cancer, Chinese Academy of Sciences, Hangzhou 310022, Zhejiang, China.,College of Chemistry and Chemical Engineering, Qufu Normal University, Qufu 273165, Shandong, China
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Photoelectrochemical biosensor for N6-methyladenosine detection based on enhanced photoactivity of TiO2-X and MoS2 nanocomposite. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115444] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Plasmonic TiO2@Au NPs//CdS QDs photocurrent-direction switching system for ultrasensitive and selective photoelectrochemical biosensing with cathodic background signal. Anal Chim Acta 2021; 1153:338283. [DOI: 10.1016/j.aca.2021.338283] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 01/28/2021] [Accepted: 02/01/2021] [Indexed: 11/17/2022]
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