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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 X, Dong Y, Wu R, Liu D, Hu F, Wang C, Wu D. A method to improve water‐holding capacity of beef during freezing‐thawing process using ultrasound treatment. J FOOD PROCESS PRES 2020. [DOI: 10.1111/jfpp.15004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Xiaodan Wang
- College of Food Science and Engineering Jilin University Changchun China
| | - Yanli Dong
- College of Food Science and Engineering Jilin University Changchun China
| | - Ruijia Wu
- College of Food Science and Engineering Jilin University Changchun China
| | - Dengyong Liu
- College of Food Science and Technology Bohai University Jinzhou China
| | - Feng Hu
- College of Food Science and Engineering Jilin University Changchun China
| | - Cuilian Wang
- College of Food Science and Engineering Jilin University Changchun China
| | - Duo Wu
- College of Food Science and Engineering Jilin University Changchun China
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Siripatrawan U, Makino Y. Simultaneous assessment of various quality attributes and shelf life of packaged bratwurst using hyperspectral imaging. Meat Sci 2018; 146:26-33. [DOI: 10.1016/j.meatsci.2018.06.024] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Revised: 06/18/2018] [Accepted: 06/21/2018] [Indexed: 12/15/2022]
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