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Cui X, Lv L, Zhao K, Tian P, Chao X, Li Y, Zhang B. Exo Ⅲ-assisted amplification signal strategy synergized with Au@Pt NFs/CoSe 2 for sensitive detection of enrofloxacin. Bioelectrochemistry 2024; 160:108750. [PMID: 38852385 DOI: 10.1016/j.bioelechem.2024.108750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/20/2024] [Accepted: 05/27/2024] [Indexed: 06/11/2024]
Abstract
Overuse of enrofloxacin (ENR) has posed a potential threat to ecosystems and public health, so it is critical to sensitive and accurate determination of ENR residues. In this work, a novel ultra-sensitive and specific electrochemical aptasensor was fabricated based on the cobalt diselenide loaded gold and platinum nanoflowers (Au@Pt NFs/ CoSe2) and Exonuclease III (Exo III)-assisted cycle amplification strategy for the detection of ENR. Au@Pt NFs/ CoSe2 nanosheets as the substrate material, with large surface area, accelerate electron transfer and attach more DNA probes on the electrode substrate, have effectively enhanced the electrochemical performance of the electrode. With the existence of Enrofloxacin (ENR), the aptamer recognizes and binds to ENR, thus the signal probe cDNA was released and immobilized onto the electrode surface to hybridized with methylene blue (MB) labelled DNA (MB-DNA), thereby triggering the Exo III-assisted cycle for further signal amplification. As expected, the prepared aptasensor demonstrated excellent sensitivity and selectivity, with a wide linear range from 5.0 × 10-6 ng/mL to 1.0 × 10-2 ng/mL for ENR, a low detection limit of 1.59 × 10-6 ng/mL. Consequently, this strategy provided a promising avenue for ultrasensitive and accurate detection of ENR in milk samples.
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Affiliation(s)
- Xiaoying Cui
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China
| | - Lina Lv
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China; JIANGSU YUYUE KAILITE BIOTECHNOLOGY Co., LTD., Danyang, Baisheng Road1#, Zhenjiang 212300, Jiangsu Province, People's Republic of China
| | - Ke Zhao
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China
| | - Panpan Tian
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China; China National Chemical Huayi Engineering And Technology Group Co., Ltd, Jinhai Road 6055#, Fengxian District, 201406 Shanghai, People's Republic of China
| | - Xipeng Chao
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China
| | - Ying Li
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China
| | - Baozhong Zhang
- School of Environmental Engineering, Henan University of Technology, Lianhua Road 100#, Zhengzhou 450001, Henan Province, People's Republic of China.
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Xin FF, Xu JJ, Zhang J, Wang AJ, Xue Y, Mei LP, Song P, Feng JJ. Nanozyme-assisted ratiometric photoelectrochemical aptasensor over Cu 2O nanocubes mediated photocurrent-polarity-switching based on S-scheme FeCdS@FeIn 2S 4 heterostructure. Biosens Bioelectron 2023; 237:115442. [PMID: 37321042 DOI: 10.1016/j.bios.2023.115442] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 05/23/2023] [Accepted: 05/30/2023] [Indexed: 06/17/2023]
Abstract
The controllable modulation of the response mode is highly attractive for the construction of photoelectrochemical (PEC) sensors with improved sensitivity and anti-interference ability in complex real samples matrix. Here, we present a charming proof-of-concept ratiometric PEC aptasensor of enrofloxacin (ENR) analysis via the controllable signal transduction. Different with the traditional sensing mechanism, this ratiometric PEC aptasensor integrates the anodic PEC signal induced by PtCuCo nanozyme-catalyzed precipitation reaction and the polarity-switching cathodic PEC response mediated by Cu2O nanocubes on S-scheme FeCdS@FeIn2S4 heterostructure. Taking advantages of the photocurrent-polarity-switching signal response model and the superior performance of the photoactive substrate material, the proposed ratiometric PEC aptasensor displays a good detection linear range for ENR analysis from 0.01 pg mL-1 to 10 ng mL-1, with a detection limit of 3.3 fg mL-1. This study provides a general platform for detecting interested trace analytes in real samples and expands the diversity of sensing strategy design.
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Affiliation(s)
- Fang-Fang Xin
- College of Geography and Environmental Sciences, College of Chemistry and Materials Science, Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Jin-Jin Xu
- College of Geography and Environmental Sciences, College of Chemistry and Materials Science, Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Jin Zhang
- College of Geography and Environmental Sciences, College of Chemistry and Materials Science, Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Ai-Jun Wang
- College of Geography and Environmental Sciences, College of Chemistry and Materials Science, Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China
| | - Yadong Xue
- Central Laboratory, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, 321000, China
| | - Li-Ping Mei
- College of Geography and Environmental Sciences, College of Chemistry and Materials Science, Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China.
| | - Pei Song
- College of Geography and Environmental Sciences, College of Chemistry and Materials Science, Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China; Central Laboratory, Affiliated Jinhua Hospital, Zhejiang University School of Medicine, Jinhua, 321000, China.
| | - Jiu-Ju Feng
- College of Geography and Environmental Sciences, College of Chemistry and Materials Science, Key Laboratory of Watershed Earth Surface Processes and Ecological Security, Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Zhejiang Normal University, Jinhua, 321004, China.
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