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Li D, Wei H, Hong R, Yue X, Dong L, Fan K, Yu J, Yao D, Xu H, Lu J, Wang G. WS 2 nanosheets-based electrochemical biosensor for highly sensitive detection of tumor marker miRNA-4484. Talanta 2024; 274:125965. [PMID: 38552480 DOI: 10.1016/j.talanta.2024.125965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 03/18/2024] [Accepted: 03/20/2024] [Indexed: 05/04/2024]
Abstract
In this paper, a few-layer WS2 nanosheets-based electrochemical biosensor was fabricated for the highly sensitive detection of breast cancer tumor marker miRNA-4484. Firstly, few-layer WS2 nanosheets were prepared by shear stripping and characterized by SEM, TEM, AFM and UV spectrophotometer. After modification of few-layer WS2 nanosheets on the electrode surface, the miRNA probe was fixed on the few-layer WS2 nanosheets by polycytosine (PolyC). Then short-chain miRNA containing PolyC was used as the blocking agent to close the excess active sites on the surface of WS2 nanosheets to complete the fabrication of the sensor biosensing interface. Finally, the current changes caused by the specific binding of miRNA-4484 to the probe were analyzed by differential pulse voltammetry (DPV). The results showed that the sensor had a good linear relationship for the detection of miRNA-4484 in the concentration range of 1 aM-100 fM, and the detection limit was as low as 1.61 aM. In addition, the electrochemical sensor had excellent selectivity, stability and reproducibility. The artificial sample tests indicated that the developed biosensors have the potential for clinical application in the future.
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Affiliation(s)
- Dujuan Li
- Ministry of Education Engineering Research Center of Smart Microsensors and Microsystems, Hangzhou Dianzi University, Hangzhou, 310018, China; School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China.
| | - Huyue Wei
- Ministry of Education Engineering Research Center of Smart Microsensors and Microsystems, Hangzhou Dianzi University, Hangzhou, 310018, China; School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Rui Hong
- School of Automation, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Xiaojie Yue
- The Children's Hospital of Zhejiang University School of Medicine, Hangzhou, 310052, China
| | - Linxi Dong
- Ministry of Education Engineering Research Center of Smart Microsensors and Microsystems, Hangzhou Dianzi University, Hangzhou, 310018, China.
| | - Kai Fan
- School of Automation, Hangzhou Dianzi University, Hangzhou, 310018, China
| | - Jing Yu
- Zhejiang Key Laboratory of Ecological and Environmental Big Data, Hangzhou, 321001, China
| | - Defei Yao
- Zhejiang Key Laboratory of Ecological and Environmental Big Data, Hangzhou, 321001, China
| | - Hong Xu
- Guangdong Technology Research Center for Marine Algal Bioengineering, College of Life Sciences and Oceanography, Shenzhen University, Shenzhen, 518060, China
| | - Jun Lu
- Auckland Bioengineering Institute, University of Auckland, Auckland, 1142, New Zealand
| | - Gaofeng Wang
- Ministry of Education Engineering Research Center of Smart Microsensors and Microsystems, Hangzhou Dianzi University, Hangzhou, 310018, China; School of Electronics and Information, Hangzhou Dianzi University, Hangzhou, 310018, China.
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A duplex-specific nuclease assisted photoelectrochemical biosensor based on MoS2@ReS2/Ti3C2 hybrid for ultrasensitive detection of colorectal cancer-related piRNA-31143. Acta Biomater 2022; 149:287-296. [DOI: 10.1016/j.actbio.2022.06.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 06/16/2022] [Accepted: 06/21/2022] [Indexed: 11/18/2022]
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MXene-MoS 2 heterostructure collaborated with catalyzed hairpin assembly for label-free electrochemical detection of microRNA-21. Talanta 2022; 237:122927. [PMID: 34736664 DOI: 10.1016/j.talanta.2021.122927] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 09/13/2021] [Accepted: 10/02/2021] [Indexed: 11/21/2022]
Abstract
Abnormal expression of microRNAs is greatly associated with the occurrence of various cancer types, revealing great potential of microRNA as biomarkers for cancer diagnosis and prognosis. Herein, a MXene-MoS2 heterostructure enhancing electrochemical biosensor coupled with catalytic hairpin assembly (CHA) amplification approach for label-free determination of microRNA-21 (miR-21) was successfully assembled. In particular, the unique micro-nano heterostructure with large specific area and favorable electroconductivity exhibited the ability of excellent confinement effect. Thus, rendered the MXene-MoS2 heterostructure the ability to trigger more target recycling reaction, giving new vitality to the traditional CHA amplification method. Meanwhile, thionine (Thi) and gold nanoparticles (AuNPs) were anchoring at the surface of MXene-MoS2 heterostructure, respectively, empowered the sensor the capability of capture probes fixation and miR-21 label-free determination. When numerous electronegative double-stranded DNA generated, the electron transfer was greatly hindered, resulting in signal decrease. Accordingly, the design denoted a broad dynamic range from 100 fM to 100 nM and a detection limit of about 26 fM, comparable or lower than previous reported methods for miR-21 detection. Furthermore, the sensing platform supplied satisfactory selectivity, reproducibility and stability towards the miR-21 detection. The real sample determination also showed a promising performance under clinical circumstance. Finally, from the clinical standpoint, the proposed biosensor is a considerable platform toward early disease detection and monitoring.
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