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Wang S, Yan Z, Shen F, Du L, Li G, Yang Q, Hu Q. Novel aptasensor based on polyaniline functionalized carboxylated dobby carbon nanotubes and molybdenum disulfide for endotoxin detection. Talanta 2024; 276:126256. [PMID: 38762977 DOI: 10.1016/j.talanta.2024.126256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 05/07/2024] [Accepted: 05/11/2024] [Indexed: 05/21/2024]
Abstract
Endotoxins, also known as lipopolysaccharides (LPS), are present within the cell walls of Gram-negative bacteria and are released upon cellular death, which can pose a significant risk to human and animal health. Due to the minimal amount of endotoxin required to trigger an inflammatory response in human body, the demand for sensitive methods with low endotoxin detection limits is essential necessary. This paper presents a straightforward aptamer sensor which can enhance the conductivity and specific surface area of molybdenum disulfide (MoS2) by incorporating carboxylated multi-walled carbon nanotubes (MWCNTs-COOH) and polyaniline (PANI). Doping with gold nanoparticles (AuNPs) improves biocompatibility and sensitivity while providing binding sites for thiolated endotoxin-binding aptamers (LBA). This biosensor achieved a remarkable detection limit as low as 0.5 fg mL-1, enabling trace-level identification of LPS. It also exhibits excellent repeatability, selectivity, and stability, facilitating rapid and accurate LPS detection. Moreover, this method demonstrates high recovery rates and specificity for LPS analysis in food samples, showcasing its promising application prospects in trace-level LPS detection within the food industry.
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Affiliation(s)
- Sen Wang
- College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing, 210023, China; Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
| | - Zhongjun Yan
- Zhejiang Branch of China Grain Reserves Group Ltd. Company, China
| | - Fei Shen
- College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing, 210023, China; Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China.
| | - Lihui Du
- College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing, 210023, China; Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
| | - Guanglei Li
- College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing, 210023, China; Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
| | - Qian Yang
- College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing, 210023, China; Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
| | - Qiuhui Hu
- College of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing, 210023, China; Collaborative Innovation Center for Modern Grain Circulation and Safety, Nanjing, 210023, China
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Zhang X, Wang P, Liang Z, Zhong W, Ma Q. A novel Cu-MOFs nanosheet/BiVO 4 nanorod-based ECL sensor for colorectal cancer diagnosis. Talanta 2024; 266:124952. [PMID: 37473470 DOI: 10.1016/j.talanta.2023.124952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/10/2023] [Accepted: 07/14/2023] [Indexed: 07/22/2023]
Abstract
Although luminescence metal organic framework (MOFs) has displayed the significant advantages, the limitations in the electrochemical performance (e.g. rapid charge recombination rates and inadequate charge transport) limited the sensing application of MOFs. Herein, a novel Cu-MOFs/BiVO4 nanorod-based electrogenerated chemiluminescence (ECL) sensor has been developed. Firstly, Cu-MOFs with strong luminescence were synthesized via the three-layer approach as ECL emitter. Furthermore, BiVO4 nanorods was modified on the electrode as the actuator to improve the electrochemical activity of Cu-MOFs in the ECL process. As an n-type semiconductor, BiVO4 formed a complementary structure with p-type semiconductor Cu-MOF. Therefore, electrons in the conduction band of BiVO4 transferred to that of Cu-MOF. As a result, more electrons reacted with coreactant on the surface of Cu-MOF, which effectively enhanced the ECL performance of 2D Cu-MOFs nanosheets. As a result, the quantitation of KRAS gene was realized in the linear range of 0.1 pM-1 nM with a detection limit of 0.02 fM. Moreover, the detection of KRAS gene in actual colorectal cancer samples was also carried out with good recovery, which offered a broad application possibility for ECL research and clinical analysis.
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Affiliation(s)
- Xinyuan Zhang
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Peilin Wang
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Zihui Liang
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China
| | - Weiyao Zhong
- Department of Laboratory Medicine Center, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Qiang Ma
- Department of Analytical Chemistry, College of Chemistry, Jilin University, Changchun, 130012, China.
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Tao H, Liu F, Ji C, Wu Y, Wang X, Shi Q. A novel electrochemical sensing platform based on the esterase extracted from kidney bean for high-sensitivity determination of organophosphorus pesticides. RSC Adv 2022; 12:5265-5274. [PMID: 35425578 PMCID: PMC8981541 DOI: 10.1039/d1ra08129b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 02/06/2022] [Indexed: 11/21/2022] Open
Abstract
An electrochemical sensing platform using kidney bean esterase as a new detection enzyme was proposed for organophosphorus pesticide determination. The determination of trichlorfon can be easily achieved with a LOD as low as 3 ng L−1 (S/N = 3).
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Affiliation(s)
- Han Tao
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Feng Liu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Chun Ji
- School of Pharmaceutical Sciences, Guizhou University, Guiyang 550025, China
| | - Yuangen Wu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Xiao Wang
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Qili Shi
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
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Aoki H. Sensors with Highly Ordered Nucleotides. ANAL SCI 2021; 37:1191-1192. [PMID: 34511541 DOI: 10.2116/analsci.highlights2109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Hiroshi Aoki
- National Institute of Advanced Industrial Science and Technology (AIST)
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Label-free rapid electrochemical detection of DNA hybridization using ultrasensitive standalone CNT aerogel biosensor. Biosens Bioelectron 2021; 191:113480. [PMID: 34242998 DOI: 10.1016/j.bios.2021.113480] [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: 04/23/2021] [Revised: 06/10/2021] [Accepted: 07/02/2021] [Indexed: 01/14/2023]
Abstract
We report the development of an ultrasensitive label-free DNA biosensor device with fully integrated standalone carbon nanotube (CNT) aerogel electrode. The multi-directional tenuous network of clustered CNT embedding into the CNT aerogel electrode demonstrates linear ohmic and near isotropic electrical properties, thereby providing high sensitivity for nucleic acid detection. Using this device, the target DNA hybridization is detected by a quantifiable change in the electrochemical impedance, with a distinct response to the single-stranded probe alone or double-stranded target-probe complex. The target DNA is specifically detected with limit of detection (LoD) of 1 pM with a turnaround time of less than 20 min, which is unprecedented for a miniaturized CNT aerogel sensor and impedance spectroscopy without an intermediate DNA amplification step. Moreover, this system is able to differentiate between the closely related target sequences by the distinct impedance response rendering it highly specific. To the best of our knowledge, this is the first report showing the use of standalone bare CNT aerogel electrode without any substrate support, coupled with electrochemical impedance spectroscopy, for the detection of DNA hybridization. Altogether, the results show that our system is fast, sensitive and specific for label-free rapid direct DNA detection, promising a novel avenue for bio-sensing.
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Sasaki N, Kase C, Sato K. Bead-based Padlock Rolling Circle Amplification under Molecular Crowding Conditions: The Effects of Crowder Charge and Size. ANAL SCI 2021; 37:727-732. [PMID: 33487597 DOI: 10.2116/analsci.20scp14] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Bead-based padlock rolling circle amplification under molecular crowding conditions, which we have developed for ultrasensitive detection of DNA, is examined to improve the detection efficiency and sensitivity of the method as well as to gain insight into the mechanism of the method. Both non-magnetic and magnetic sepharose microbeads were employed. Biotinylated DNA had to be pre-immobilized onto the microbeads in order to obtain products on the magnetic beads. The optimal concentration of biotinylated DNA was found to be about 5 μM, above which the number of products decreased. The effect of the crowder charge was examined, and neutral polymers were found to be effective on ligation and the hybridization step, while charged polymers were only effective on the hybridization step and inhibited the ligation and primer extension. The effect of the molecular weight of neutral dextran on the number of products was investigated, and the number of products was found to be increased with an increase in the molecular weight of dextran.
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Affiliation(s)
- Naoki Sasaki
- Department of Chemistry, College of Science, Rikkyo University
| | - Chikako Kase
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University
| | - Kae Sato
- Department of Chemical and Biological Sciences, Faculty of Science, Japan Women's University
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Venkadesh A, Mathiyarasu J, Radhakrishnan S. Electrochemical Enzyme-free Sensing of Oxalic Acid Using an Amine-mediated Synthesis of CuS Nanosphere. ANAL SCI 2020; 37:949-954. [PMID: 33162414 DOI: 10.2116/analsci.20p370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Copper sulfide nanospheres (CuS NS) were prepared by a solvothermal method with the support of p-phenylene diamine as a structure direct agent. The formation of CuS NS was evaluated using XRD, FE-SEM, HR-TEM, XPS, and electrochemical methods. The CuS NS modified electrode demonstrated excellent electro-catalytic behavior for the electro-oxidation of oxalic acid (OA). The modified electrode showed a good linear range (50 to 700 μM), high sensitivity (0.0353 μA μM-1 cm-2), a low detection limit (35.6 μM), long term stability and good anti-interference behavior.
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Affiliation(s)
- A Venkadesh
- Electrodics and Electrocatalysis Division, CSIR-Central Electrochemical Research Institute.,Academy of Scientific and Innovative Research (AcSIR)
| | - J Mathiyarasu
- Electrodics and Electrocatalysis Division, CSIR-Central Electrochemical Research Institute.,Academy of Scientific and Innovative Research (AcSIR)
| | - S Radhakrishnan
- Electrodics and Electrocatalysis Division, CSIR-Central Electrochemical Research Institute.,Academy of Scientific and Innovative Research (AcSIR)
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Nur Topkaya S, Cetin AE. Electrochemical Aptasensors for Biological and Chemical Analyte Detection. ELECTROANAL 2020. [DOI: 10.1002/elan.202060388] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Seda Nur Topkaya
- Izmir Katip Celebi University Faculty of Pharmacy, Department of Analytical Chemistry 35620, Cigli Izmir TURKEY
| | - Arif E. Cetin
- Izmir Biomedicine and Genome Center 35330, Balcova Izmir TURKEY
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