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Cui J, Luo Q, Wei C, Deng X, Liang H, Wei J, Gong Y, Tang Q, Zhang K, Liao X. Electrochemical biosensing for E.coli detection based on triple helix DNA inhibition of CRISPR/Cas12a cleavage activity. Anal Chim Acta 2024; 1285:342028. [PMID: 38057050 DOI: 10.1016/j.aca.2023.342028] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 11/08/2023] [Accepted: 11/11/2023] [Indexed: 12/08/2023]
Abstract
BACKGROUND Escherichia coli (E.coli) is both a commensal and a foodborne pathogenic bacterium in the human gastrointestinal tract, posing significant potential risks to human health and food safety. However, one of the major challenges in E.coli detection lies in the preparation and storage of antibodies. In traditional detection methods, antibodies are indispensable, but their instability often leads to experimental complexity and increased false positives. This underscores the need for new technologies and novel sensors. Therefore, the development of a simple and sensitive method for analyzing E.coli would make significant contributions to human health and food safety. RESULTS We constructed an electrochemical biosensor based on triple-helical DNA and entropy-driven amplification reaction (EDC) to inhibit the cleavage activity of Cas12a, enabling high-specificity detection of E.coli. Replacing antibodies with nucleic acid aptamers (Apt) as recognition elements, we utilized the triple-helical DNA generated by the binding of DNA2 and DNA5/DNA6 double-helical DNA through the entropy-driven amplification reaction to inhibit the collateral cleavage activity of clustered regularly interspaced short palindromic repeats gene editing system (CRISPR) and its associated proteins (Cas). By converting E.coli into electrical signals and recording signal changes in the form of square wave voltammetry (SWV), rapid detection of E.coli was achieved. Optimization of experimental conditions and data detection under the optimal conditions provided high sensitivity, low detection limits, and high specificity. SIGNIFICANCE With a minimal detection limit of 5.02 CFU/mL and a linear range of 1 × 102 - 1 × 107 CFU/mL, the suggested approach was successfully verified to analyze E.coli at various concentrations. Additionally, after examining E.coli samples from pure water and pure milk, the recoveries ranged between 95.76 and 101.20%, demonstrating the method's applicability. Additionally, it provides a feasible research direction for the detection of pathogenic bacteria causing other diseases using the CRISPR/Cas gene editing system.
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Affiliation(s)
- Jiuying Cui
- Guangxi key laboratory of basic and translational research of Bone and joint Degenerative Disease, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Qisheng Luo
- Guangxi key laboratory of basic and translational research of Bone and joint Degenerative Disease, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Cheng Wei
- Guangxi key laboratory of basic and translational research of Bone and joint Degenerative Disease, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Xiandong Deng
- Guangxi key laboratory of basic and translational research of Bone and joint Degenerative Disease, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Hongqu Liang
- Guangxi key laboratory of basic and translational research of Bone and joint Degenerative Disease, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Jihua Wei
- Guangxi key laboratory of basic and translational research of Bone and joint Degenerative Disease, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Yuanxun Gong
- Guangxi key laboratory of basic and translational research of Bone and joint Degenerative Disease, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China
| | - Qianli Tang
- Guangxi key laboratory of basic and translational research of Bone and joint Degenerative Disease, The Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China.
| | - Kai Zhang
- School of Chemistry and Materials Science, Nanjing University of Information Science and Technology. Nanjing, 210044, P. R. China.
| | - Xianjiu Liao
- School of Pharmacy, Youjiang Medical University for Nationalities, Baise, Guangxi 533000, China.
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Wang J, Wang X, Li B, Zhang K, Mao J. Entropy-driven reactions for controlling CRISPR/Cas12a and constructing an electrochemical biosensor for cardiac biomarkers detection. Mikrochim Acta 2023; 190:440. [PMID: 37845542 DOI: 10.1007/s00604-023-06012-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 09/20/2023] [Indexed: 10/18/2023]
Abstract
An electrochemical biosensor is reported for controlling CRISPR/Cas12a activity through the utilization of entropy-driven reactions, alongside the construction of a highly sensitive biosensor for B-type natriuretic peptide (BNP) detection. In the biosensor, entropy-driven reactions are employed to regulate the activity of CRISPR/Cas12a - a gene editing tool - capable of nonspecific cleavage of single-stranded DNA (ssDNA). The biosensor architecture encompasses an electrode that is modified with ssDNA probes designed to hybridize with target BNP aptamers. These aptamers, furnished with labeled ssDNA triggers, facilitate the activation of CRISPR/Cas12a through interaction with its guide RNA. Upon the presence of BNP, it associates with the aptamers, subsequently liberating the triggers that instigate the entropy-driven reactions. As a consequence of these reactions, more stable duplexes emerge between the triggers and guide RNA, thereby activating CRISPR/Cas12a. The activated CRISPR/Cas12a subsequently executes cleavage of ssDNA probes residing on the electrode surface, culminating in the generation of an electrochemical signal directly (the calibration plots of differential pulse voltammetric detection were acquired at a working potential of 0.2 V (vs. ref. electrode)) proportional to the BNP concentration. Validation of the biosensor's performance is undertaken, wherein BNP detection is demonstrated in both buffer and human serum samples. Evident in the findings is the biosensor's discernible sensitivity and specificity for BNP detection, exemplified by a detection limit of 13.53 fM and a lack of interference originating from other cardiac biomarkers, respectively. Furthermore, the biosensor's potential to discriminate between healthy individuals and those afflicted by heart failure, predicated on distinctive BNP levels, is illustrated.
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Affiliation(s)
- Jiaying Wang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin City, 300193, People's Republic of China
- The Affiliated Wuxi People's Hospital of Nanjing Medical University, Wuxi People's Hospital, Wuxi Medical Center, Nanjing Medical University, Wuxi City, Jiangsu Province, 214000, People's Republic of China
- Tianjin University of Traditional Chinese Medicine, 300193, Tianjin City, People's Republic of China
| | - Xianliang Wang
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin City, 300193, People's Republic of China
| | - Bin Li
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin City, 300193, People's Republic of China
| | - Kai Zhang
- School of Chemistry and Materials Science, Nanjing University of Information Science and Technology, Nanjing City, Jiangsu Province, 210044, People's Republic of China.
| | - Jingyuan Mao
- First Teaching Hospital of Tianjin University of Traditional Chinese Medicine, National Clinical Research Center for Chinese Medicine Acupuncture and Moxibustion, Tianjin City, 300193, People's Republic of China.
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Wu L, Wang X, Wu C, Cao X, Tang T, Huang H, Huang X. Ultrasensitive SARS-CoV-2 diagnosis by CRISPR-based screen-printed carbon electrode. Anal Chim Acta 2022; 1221:340120. [PMID: 35934402 PMCID: PMC9249825 DOI: 10.1016/j.aca.2022.340120] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Revised: 06/13/2022] [Accepted: 06/22/2022] [Indexed: 12/15/2022]
Abstract
Early and accurate diagnosis of SARS-CoV-2 was crucial for COVID-19 control and urgently required ultra-sensitive and rapid detection methods. CRISPR-based detection systems have great potential for rapid SARS-CoV-2 detection, but detecting ultra-low viral loads remains technically challenging. Here, we report an ultrasensitive CRISPR/Cas12a-based electrochemical detection system with an electrochemical biosensor, dubbed CRISPR-SPCE, in which the CRISPR ssDNA reporter was immobilized onto a screen-printed carbon electrode. Electrochemical signals are detected due to CRISPR cleavage, giving enhanced detection sensitivity. CRISPR-SPCE enables ultrasensitive SARS-CoV-2 detection, reaching as few as 0.27 copies μL−1. Moreover, CRISPR-SPCE is also highly specific and inexpensive, providing a fast and simple SARS-CoV-2 assay.
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Zhang K, Fan Z, Huang Y, Ding Y, Xie M. A strategy combining 3D-DNA Walker and CRISPR-Cas12a trans-cleavage activity applied to MXene based electrochemiluminescent sensor for SARS-CoV-2 RdRp gene detection. Talanta 2022; 236:122868. [PMID: 34635250 PMCID: PMC8429000 DOI: 10.1016/j.talanta.2021.122868] [Citation(s) in RCA: 43] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/06/2021] [Accepted: 09/08/2021] [Indexed: 12/22/2022]
Abstract
Early diagnosis and timely management of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) are the keys to preventing the spread of the epidemic and controlling new infection clues. Therefore, strengthening the surveillance of the epidemic and timely screening and confirming SARS-CoV-2 infection is the primary task. In this work, we first proposed the idea of activating CRISPR-Cas12a activity using double-stranded DNA amplified by a three-dimensional (3D) DNA walker. We applied it to the design of an electrochemiluminescent (ECL) biosensor to detect the SARS-CoV-2 RNA-dependent RNA polymerase (RdRp) gene. We first activated the cleavage activity of CRISPR-Cas12a by amplifying the target DNA into a segment of double-stranded DNA through the amplification effect of a 3D DNA walker. At the same time, we designed an MXene based ECL material: PEI-Ru@Ti3C2@AuNPs, and constructed an ECL biosensor to detect the RdRp gene based on this ECL material as a framework. Activated CRISPR-Cas12a cleaves the single-stranded DNA on the surface of this sensor and causes the ferrocene modified at one end of the DNA to move away from the electrode surface, increasing the ECL signal. The extent of the change in electrochemiluminescence reflects the concentration of the gene to be measured. Using this system, we detected the SARS-CoV-2 RdRp gene with a detection limit of 12.8 aM. This strategy contributes to the rapid and convenient detection of SARS-CoV-2-associated nucleic acids and promotes the clinical application of ECL biosensors based on CRISPR-Cas12a and novel composite materials.
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Affiliation(s)
- Kai Zhang
- NHC Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China.
| | - Zhenqiang Fan
- NHC Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China
| | - Yue Huang
- College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Yuedi Ding
- NHC Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China
| | - Minhao Xie
- NHC Key Laboratory of Nuclear Medicine, Ministry of Health, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China.
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Engineering entropy-driven based multiple signal amplification strategy for visualized assay of miRNA by naked eye. Talanta 2021; 235:122810. [PMID: 34517667 DOI: 10.1016/j.talanta.2021.122810] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/13/2021] [Accepted: 08/15/2021] [Indexed: 11/21/2022]
Abstract
MicroRNAs (miRNAs) are currently recognized as novel biomarkers for cancer early diagnosis, therapy selection, and progression monitoring. Herein, we developed an ultrasensitive and label-free homogeneous colorimetric strategy for miRNA detection based on engineering entropy-driven amplification (EDA) coupled with nicking enzyme-assisted AuNP aggregation. In our design, the target miRNA could specifically trigger the EDA recycling process. One of the EDA products could open the hairpin probe and form a dual strand containing a nicking endonuclease (Nb.BbvCl) cleavage region. After adding nicking endonuclease in the sensing solution, the product DNA fragments could act as two linkers, inducing the aggregation of ssDNA-modified AuNPs. Simultaneously, the liberating complementary strands continued to cyclic hybridization with the hairpin probe. This multiple signal amplification colorimetric strategy showed a wide linear range from 10 fM to 100 pM with a much lower detection limit of 3.13 fM for miRNA let-7a, which also performed well in a complex sample matrix. Most importantly, the naked eye could clearly distinguish the 10 fM color change caused by let-7a to be measured. Moreover, this approach could easily extend to multiple miRNAs with target-specific sequence substitutions. Therefore, this ultrasensitive visual strategy for miRNA demonstrated attractive potentials for promising applications in clinical diagnosis.
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Recent advances in single-cell analysis: Encapsulation materials, analysis methods and integrative platform for microfluidic technology. Talanta 2021; 234:122671. [PMID: 34364472 DOI: 10.1016/j.talanta.2021.122671] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 06/24/2021] [Accepted: 06/26/2021] [Indexed: 12/27/2022]
Abstract
Traditional cell biology researches on cell populations by their origin, tissue, morphology, and secretions. Because of the heterogeneity of cells, research at the single-cell level can obtain more accurate and comprehensive information that reflects the physiological state and process of the cell, increasing the significance of single-cell analysis. The application of single-cell analysis is faced with the problem of contaminated or damaged cells caused by cell sample transportation. Reversible encapsulation of a single cell can protect cells from the external environment and open the encapsulation shell to release cells, thus preserving cell integrity and improving extraction efficiency of analytes. Meanwhile, microfluidic single cell analysis (MSCA) exhibits integration, miniaturization, and high throughput, which can considerably improve the efficiency of single-cell analysis. The researches on single-cell reversible encapsulation materials, single-cell analysis methods, and the MSCA integration platform are analyzed and summarized in this review. The problems of single-cell viability, network of single-cell signal, and simultaneous detection of multiple biotoxins in food based on single-cell are proposed for future research.
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Zhang K, Fan Z, Yao B, Ding Y, Zhao J, Xie M, Pan J. Exploring the trans-cleavage activity of CRISPR-Cas12a for the development of a Mxene based electrochemiluminescence biosensor for the detection of Siglec-5. Biosens Bioelectron 2021; 178:113019. [PMID: 33517231 DOI: 10.1016/j.bios.2021.113019] [Citation(s) in RCA: 43] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 01/14/2021] [Accepted: 01/18/2021] [Indexed: 12/28/2022]
Abstract
Sialic acid-binding immunoglobulin (Ig)-like lectins (Siglecs) is a type I transmembrane receptor on the cell surface. Siglec-5, as one of the Siglecs family, play an important role as an inhibitory receptor for leukocytes in the human body. The development of novel siglec-5 assays can help to study the pathogenesis of related diseases as well as to develop novel therapeutic drugs. We use catalytic hairpin assembly (CHA) amplification strategy combined with CRISPR-Cas12a's side-cutting feature to build a 2D ultra-thin Ti3C2Tx (MXene) based electrochemiluminescence (ECL) biosensor for the detection of Siglec-5. By using this ECL biosensor, the cleavage of CRISPR-Cas12a is reasonably combined with CHA-mediated isothermal amplification, thereby realizing the sensitive amplification assay Siglec-5 with 20.22 fM sensitivity. By introducing pairs of sites that are not in the same double-stranded DNA into the DNA duplex, the hybridization sequence of CRISPR-Cas12a complements the targeting mechanism to enhance indirect Siglec-5 amplification assay. Also, the double-strand DNA (dsDNA) design based on CRISPR-Cas12a amplification allows the same CRISPR RNA (crRNA, also known as guide RNA (gRNA)) to detect the output of DNA duplexes from different intermediate DNAs, which provides a common way for biomarker detection based on the conversion of protein analytes to intermediate DNA strategy. This work extends the application scope of CRISPR-Cas12a to the construction of ECL biosensors, evaluates the role of lectins, which can be used for the biochemical research and clinical diagnosis of protein markers. This is the first investigative work exploring the Trans-Cleavage activity of CRISPR-Cas12a for Mxene-based ECL biosensor establishment to the best of our knowledge.
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Affiliation(s)
- Kai Zhang
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China.
| | - Zhenqiang Fan
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China
| | - Bo Yao
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China
| | - Yuedi Ding
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China
| | - Jing Zhao
- Center for Molecular Recognition and Biosensing, School of Life Sciences, Shanghai University, Shanghai, 200444, PR China
| | - Minhao Xie
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China
| | - Jianbin Pan
- State Key Laboratory of Analytical Chemistry for Life Science and Collaborative Innovation Center of Chemistry for Life Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, 210023, China.
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Zhang K, Fan Z, Yao B, Zhang T, Ding Y, Zhu S, Xie M. Entropy-driven electrochemiluminescence ultra-sensitive detection strategy of NF-κB p50 as the regulator of cytokine storm. Biosens Bioelectron 2020; 176:112942. [PMID: 33401144 PMCID: PMC7772087 DOI: 10.1016/j.bios.2020.112942] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Revised: 12/19/2020] [Accepted: 12/24/2020] [Indexed: 01/08/2023]
Abstract
2019 novel coronavirus (2019-nCoV) with strong contagion in the crowd, has ravaged worldwide and severely impacts the human health and epidemic prevention system, by producing a series of significant stress reactions in the body to induce further cytokine storm. Transcription factors (TFs) served as essential DNA binding proteins play an integral role in regulating cytokine storm, and the detection of it in the human coronavirus environment provides especially valuable approaches to diagnosis and treatment of 2019-nCoV and development of antiviral drugs. In this work, an entropy-driven electrochemiluminescence (ECL) biosensor was constructed for ultra-sensitive bioassay of NF-κB p50. The strategy primarily capitalizing the splendid double-stranded DNA (dsDNA) binding properties of transcription factors, employing GOAu-Ru composite material as ECL emitter, utilizing entropy-driven reactions for signal amplification method, offered a repeatable proposal for TFs detection. In the absence of TFs, the released DNA1 further went in the entropy-driven reaction, contributing to an “ECL off” state. However, in the presence of TFs, the dsDNA avoided being digested, which blocked DNA1 for participating in the entropy-driven reaction, and the system exhibited an “ECL on” state. Most importantly, the ECL bioanalytical method denoted broad application prospects for NF-κB p50 detection with a lower detection limit (9.1 pM). 2019-nCoV can induce cytokine storm in the body. Transcription factors are essential in regulating cytokine storm. Electrochemiluminescence sensor for NF-κB p50 detection is fabricated. Entropy-driven reaction facilitates the signal amplification. GOAu-Ru composites serve as ECL emitters.
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Affiliation(s)
- Kai Zhang
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China
| | - Zhenqiang Fan
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China
| | - Bo Yao
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China; Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NanjingTech), 30 South Puzhu Road, Nanjing, 211816, PR China
| | - Tingting Zhang
- Jiangsu Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huaian, 223300, PR China
| | - Yuedi Ding
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China
| | - Sha Zhu
- Department of Oncology, The Affiliated Wuxi No.2 People's Hospital of Nanjing Medical University, Wuxi, 214000, PR China
| | - Minhao Xie
- NHC Key Laboratory of Nuclear Medicine, Jiangsu Key Laboratory of Molecular Nuclear Medicine, Jiangsu Institute of Nuclear Medicine, Wuxi, Jiangsu, 214063, China; Department of Radiopharmaceuticals, School of Pharmacy, Nanjing Medical University, Nanjing, 211166, China.
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Three-way junction-promoted recycling amplification for sensitive DNA detection using highly bright DNA-silver nanocluster as label-free output. Talanta 2020; 206:120216. [DOI: 10.1016/j.talanta.2019.120216] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 07/15/2019] [Accepted: 07/31/2019] [Indexed: 12/11/2022]
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Multiple self-cleaning paper-based electrochemical ratiometric biosensor based on the inner reference probe and exonuclease III-assisted signal amplification strategy. Biosens Bioelectron 2020; 147:111769. [DOI: 10.1016/j.bios.2019.111769] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 09/24/2019] [Accepted: 10/07/2019] [Indexed: 02/07/2023]
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Chen J, Luo Z, Sun C, Huang Z, Zhou C, Yin S, Duan Y, Li Y. Research progress of DNA walker and its recent applications in biosensor. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.115626] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Label-free and ultrasensitive electrochemical biosensor for the detection of EBV-related DNA based on AgDNCs@DNA/AgNCs nanocomposites and lambda exonuclease-assisted target recycling. Biosens Bioelectron 2019; 143:111610. [DOI: 10.1016/j.bios.2019.111610] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Revised: 08/07/2019] [Accepted: 08/17/2019] [Indexed: 11/18/2022]
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