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Li M, Yu Q, Zheng M, Jiang R, Zhu H, Guo H, Sun H, Liu M. A label-free electrochemical immunosensor based on Au-BSN-rGO for highly-sensitive detection of β-amyloid 1-42. NANOSCALE 2023; 15:4063-4070. [PMID: 36734202 DOI: 10.1039/d2nr05787e] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
A label-free electrochemical immunosensor for high-sensitive detection of β-amyloid 1-42 (Aβ 1-42) was constructed based on Au-modified B, S, and N co-doped reduced graphene oxide (Au-BSN-rGO). The electronic structure of Au-BSN-rGO was investigated by first-principles calculations, which showed that the band gap of graphene was opened, thus improving its electrical conductivity. Moreover, Au-BSN-rGO was successfully prepared and characterized, and the obtained results discovered that it could be used as a signal amplifier for immunosensors due to the advantages of the good electrochemical characteristics and enormous surface area of BSN-rGO and the accelerated electron transfer ability of Au NPs. Furthermore, the label-free electrochemical immunosensor had a linear detection range of 0.1 pg mL-1-10 ng mL-1 and a detection limit of 0.072 pg mL-1, and it had good specificity, stability, and reproducibility. Also, this immunosensor showed recoveries of 89%-109% with an RSD of 2.61%-4.19% for detecting Aβ 1-42 in actual sample analysis. Therefore, the label-free electrochemical immunosensor based on Au-BSN-rGO should have a promising clinical application prospect for detecting Aβ 1-42.
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Affiliation(s)
- Mengjiao Li
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), School of Biological Engineering and Food, Hubei University of, Technology, Wuhan, 430068, PR China
- Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan, 430068, PR China.
| | - Qingjie Yu
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), School of Biological Engineering and Food, Hubei University of, Technology, Wuhan, 430068, PR China
- Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan, 430068, PR China.
| | - Meie Zheng
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), School of Biological Engineering and Food, Hubei University of, Technology, Wuhan, 430068, PR China
- Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan, 430068, PR China.
| | - Rongrong Jiang
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), School of Biological Engineering and Food, Hubei University of, Technology, Wuhan, 430068, PR China
- Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan, 430068, PR China.
| | - Hongda Zhu
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), School of Biological Engineering and Food, Hubei University of, Technology, Wuhan, 430068, PR China
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Wuhan, 430068, PR China
- Key Laboratory of Fermentation Engineering (Ministry of Education), Wuhan, 430068, PR China
- Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan, 430068, PR China.
| | - Huiling Guo
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), School of Biological Engineering and Food, Hubei University of, Technology, Wuhan, 430068, PR China
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Wuhan, 430068, PR China
- Key Laboratory of Fermentation Engineering (Ministry of Education), Wuhan, 430068, PR China
- Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan, 430068, PR China.
| | - Hongmei Sun
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), School of Biological Engineering and Food, Hubei University of, Technology, Wuhan, 430068, PR China
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Wuhan, 430068, PR China
- Key Laboratory of Fermentation Engineering (Ministry of Education), Wuhan, 430068, PR China
- Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan, 430068, PR China.
| | - Mingxing Liu
- Cooperative Innovation Center of Industrial Fermentation (Ministry of Education & Hubei Province), School of Biological Engineering and Food, Hubei University of, Technology, Wuhan, 430068, PR China
- National "111" Center for Cellular Regulation and Molecular Pharmaceutics, Wuhan, 430068, PR China
- Key Laboratory of Fermentation Engineering (Ministry of Education), Wuhan, 430068, PR China
- Hubei Key Laboratory of Industrial Microbiology, Hubei University of Technology, Wuhan, 430068, PR China.
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