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Lu X, Wang L, Li G, Wang Y, Hao G, Ding Y, Liu M, Fu S, Xu L, Ge N, Ge W. Ratiometric fluorescence platform for the ultrasensitive detection of kanamycin based on split aptamer co-recognition triggers Mg 2+-DNAzyme-driven DNA walker systems. Sci Total Environ 2024; 928:172499. [PMID: 38631645 DOI: 10.1016/j.scitotenv.2024.172499] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2024] [Revised: 04/08/2024] [Accepted: 04/13/2024] [Indexed: 04/19/2024]
Abstract
In this work, a novel 3D-DNA walker signal amplification strategy was designed to construct a fluorescent aptasensor for the detection of kanamycin (KAN). The aptasensor utilizes split aptamers for the synergistic recognition of KAN. The presence of KAN induces the split aptamers recombination to form the Mg2+-DNAzyme structure, which is activated by Mg2+ to drive the 3D-DNA walker process for cascading signal amplification. Employing gold nanoflowers (AuNFs) as walking substrate material increases the local DNA concentration to enhance the walker efficiency. The prepared fluorescent aptasensor achieved efficient and sensitive detection of KAN with satisfactory results in the concentration range of 1 × 10-8 - 1 × 10-3 μg/kg and the detection limit of 5.63 fg/kg. Meanwhile, the designed fluorescent aptasensor exhibited favorable specificity, anti-interference, storage stability and reproducibility, and verified the feasibility of its application in milk samples. The present work provides an effective tool for the regulation of KAN contamination in animal-derived foods with promising prospects.
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Affiliation(s)
- Xia Lu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Long Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Guowei Li
- Shaanxi Goat Milk Prod Qual Supervis & Inspect Ct, Qual Inspect Dept, Fuping Cty Inspect & Testing Ctr, Fuping 711700, PR China
| | - Yuxin Wang
- Shaanxi Zhongjian Test Technology Co., Ltd, Xi'an, Shaanxi 71000, PR China
| | - Guo Hao
- Shaanxi Goat Milk Prod Qual Supervis & Inspect Ct, Qual Inspect Dept, Fuping Cty Inspect & Testing Ctr, Fuping 711700, PR China
| | - Yi Ding
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Mengjia Liu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Shangchen Fu
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China
| | - Liqing Xu
- Shandong Institute for Food and Drug Control, Jinan, Shandong 250101,PR China
| | - Na Ge
- Tieling Food Inspection and Testing Center, Tieling, Liaoning 112608, PR China
| | - Wupeng Ge
- College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China.
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Zhou H, Ding K, Li B, Wang H, Zhang N, Liu J. Proximity binding induced nucleic acid cascade amplification strategy for ultrasensitive homogeneous detection of PSA. Anal Chim Acta 2021; 1186:339123. [PMID: 34756258 DOI: 10.1016/j.aca.2021.339123] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 07/28/2021] [Revised: 09/18/2021] [Accepted: 09/25/2021] [Indexed: 12/15/2022]
Abstract
In this work, based on the powerful cycle amplification cascades of proximity hybridization-induced hybridization chain reaction and catalyzed hairpin assembly, we engineered a nonenzymatic and ultrasensitive method which combined the Mg2+-DNAzyme recycling signal amplification for the analysis of the human prostate specific antigen. Herein, we adopted PSA-conjugates as triggers in the self-assembly process of two hairpin DNAs (H1, H2) into the products of the CHA which could activate the HCR to induce repeated hybridization. And both ends of each adjacent sequence of the HCR products could form a unit of Mg2+-DNAzyme which in presence of cofactor Mg2+ could recognize and cyclically cleave the hairpin probes in the solution and thus generate observably enhanced fluorescent signal. Benefit from the nucleic acid circuit amplification strategy, PSA of concentration low to 0.73 pg mL-1 was detected in this system. This homogeneous sensing method in solution avoid the use of the sophisticated equipment and complex operation, as well as addition of artificial enzyme, thus greatly reducing the constraints and complexity of experimental conditions. Moreover, considering most protein biomarkers in serum don't have their corresponding aptamers, this sensing method provide a general sensing approach for homogeneous sensitive detection of these important protein biomarkers which transfer rough antigen-antibody interactivity to smart signal amplification sensing strategies, thus exhibiting a remarkable prospect in clinical application.
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Affiliation(s)
- Hong Zhou
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China.
| | - Kexin Ding
- Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, PR China
| | - Binxiao Li
- Department of Chemistry, Shanghai Stomatological Hospital, State Key Laboratory of Molecular Engineering of Polymers and Institute of Biomedical Sciences, Fudan University, Shanghai, 200433, PR China
| | - Haiyan Wang
- Department of Blood Transfusion, The Affiliated Hospital of Qingdao University, Qingdao, Shandong, 266071, PR China
| | - Ningbo Zhang
- College of Agriculture and Forestry Science, Linyi University, Linyi, 276005, PR China.
| | - Jing Liu
- College of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao, Shandong, 266590, PR China.
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