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Yan H, He B, Zhao R, Ren W, Suo Z, Xu Y, Zhang Y, Bai C, Yan H, Liu R. Electrochemical aptasensor based on Ce 3NbO 7/CeO 2@Au hollow nanospheres by using Nb.BbvCI-triggered and bipedal DNA walker amplification strategy for zearalenone detection. J Hazard Mater 2022; 438:129491. [PMID: 35785741 DOI: 10.1016/j.jhazmat.2022.129491] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [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: 04/20/2022] [Revised: 06/15/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
Herein, an electrochemical aptasensor combining Nb.BbvCI-triggered bipedal DNA walking strategy was constructed for ultrasensitive assay of zearalenone (ZEN). The aptasensor used Ce3NbO7/CeO2 @Au hollow nanospheres as electrode modification material and PdNi@MnO2/MB as the signal label. Importantly, the Ce3NbO7/CeO2 synthesized by hydrothermal method were combined with Au nanoparticles and applied to the electrode surface. The as-prepared Ce3NbO7/CeO2 @Au possessed a large surface area, excellent electrical conductivity, stability and more binding sites. PdNi@MnO2 with high specific surface area and porosity combined with molecule methylene blue (MB) was introduced into electrodes as the signal label. The proposed aptasensor utilized the advantages of specific recognition of aptamers and target molecules to release bipedal DNA walker (w-DNA), and then the w-DNA was triggered by Nb.BbvCI and entered the cycle to release more signal probes. The feasibility of this strategy was recorded by the differential pulse voltammetry (DPV) method. Under the optimized conditions, the electrochemical aptasensor exhibited a wide linear dynamic range from 1 × 10-4 to 1 × 103 ng mL-1 with a low detection limit of 4.57 × 10-6 ng mL-1. Moreover, the aptasensor had high selectivity, good stability, excellent repeatability and provided an effective method for the trace detection of ZEN in real samples.
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Affiliation(s)
- Han Yan
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Baoshan He
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China.
| | - Renyong Zhao
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China.
| | - Wenjie Ren
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Zhiguang Suo
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Yiwei Xu
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Yurong Zhang
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Chunqi Bai
- School of Food Science and Technology, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Haoyang Yan
- School of International Education, Henan University of Technology, Zhengzhou, Henan 450001, PR China
| | - Renli Liu
- Sinograin Zhengzhou Depot Ltd. Company, Zhengzhou, Henan 450066, PR China
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Feng C, Zhang C, Guo J, Li G, Ye B, Zou L. Novel preparation method of bipedal DNA walker based on hybridization chain reaction for ultrasensitive DNA biosensing. Anal Chim Acta 2021; 1176:338781. [PMID: 34399897 DOI: 10.1016/j.aca.2021.338781] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [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: 04/16/2021] [Revised: 06/05/2021] [Accepted: 06/15/2021] [Indexed: 11/27/2022]
Abstract
In this work, a novel strategy for preparation of bipedal DNA walker (BDW) based on hybridization chain reaction (HCR) with the assistance of Exonuclease III (Exo III) was proposed. Based on this strategy, an electrochemical biosensor was constructed to achieve sensitive detection of CYFRA 21-1 DNA. Firstly, target recognition and circulation were achieved through a one-step catalytic hairpin assembly (CHA) reaction. For further amplification, hybridization chain reaction (HCR) was employed to form duplex-stranded DNA (dsDNA) nanostructure in homogeneous solution. In particular, the elongated single strand of the hairpin DNA for HCR was designed as the Mg2+ DNAzyme sequence. With the assistance of Exo III, dsDNA nanostructure can be digested and transformed into large amounts of BDW. These BDW can cleave the signal probe driven by Mg2+, which was modified on the electrode surface and thus achieved "signal-off" detection of target. This BDW preparation method based on HCR with the digestion of Exo III converted one target input into large amount of BDW. Coupled with the walking cleavage of BDW, a series of cascade amplification endowed high sensitivity with this biosensor and realized ultrasensitive detection of target DNA with the detection limit as low as 3.01 aM.
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Affiliation(s)
- Changrui Feng
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, PR China
| | - Chi Zhang
- Department of Orthopedics, First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450001, PR China
| | - Jiaxin Guo
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, PR China
| | - Gaiping Li
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, PR China
| | - Baoxian Ye
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, PR China
| | - Lina Zou
- College of Chemistry, Green Catalysis Center, Zhengzhou University, Zhengzhou, 450001, PR China.
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Zhang J, Wang LL, Hou MF, Xia YK, He WH, Yan A, Weng YP, Zeng LP, Chen JH. A ratiometric electrochemical biosensor for the exosomal microRNAs detection based on bipedal DNA walkers propelled by locked nucleic acid modified toehold mediate strand displacement reaction. Biosens Bioelectron 2017; 102:33-40. [PMID: 29121557 DOI: 10.1016/j.bios.2017.10.050] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 10/23/2017] [Accepted: 10/26/2017] [Indexed: 12/13/2022]
Abstract
Sensitive and selective detection of microRNAs (miRNAs) in cancer cells derived exosomes have attracted rapidly growing interest owing to their potential in diagnostic and prognostic applications. Here, we design a ratiometric electrochemical biosensor based on bipedal DNA walkers for the attomolar detection of exosomal miR-21. In the presence of miR-21, DNA walkers are activated to walk continuously along DNA tracks, resulting in conformational changes as well as considerable increases of the signal ratio produced by target-respond and target-independent reporters. With the signal cascade amplification of DNA walkers, the biosensor exhibits ultrahigh sensitivity with the limit of detection (LOD) down to 67 aM. Furthermore, owing to the background-correcting function of target-independent reporters termed as reference reporters, the biosensor is robust and stable enough to be applied in the detection of exosomal miR-21 extracted from breast cancer cell lines and serums. In addition, because locked nucleic acid (LNA) modified toehold mediate strand displacement reaction (TMSDR) has extraordinary discriminative ability, the biosensor displays excellent selectivity even against the single-base-mismatched target. It is worth mentioning that our sensor is regenerative and stable for at least 5 cycles without diminution in sensitivity. In brief, the high sensitivity, selectivity and reproducibility, together with cheap, make the proposed biosensor a promising approach for exosomal miRNAs detection, in conjunction with early point-of-care testing (POCT) of cancer.
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Affiliation(s)
- Jing Zhang
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province 350002, PR China
| | - Liang-Liang Wang
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Mei-Feng Hou
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, Fujian Province 350002, PR China
| | - Yao-Kun Xia
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Wen-Hui He
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - An Yan
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Yun-Ping Weng
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Lu-Peng Zeng
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China
| | - Jing-Hua Chen
- Department of Pharmaceutical Analysis, The School of Pharmacy, Fujian Medical University, Fuzhou, Fujian Province 350108, PR China.
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