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Zhao J, Guo Y, Ma X, Liu S, Sun C, Cai M, Chi Y, Xu K. The Application of Hybridization Chain Reaction in the Detection of Foodborne Pathogens. Foods 2023; 12:4067. [PMID: 38002125 PMCID: PMC10670596 DOI: 10.3390/foods12224067] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 08/18/2023] [Accepted: 08/24/2023] [Indexed: 11/26/2023] Open
Abstract
Today, with the globalization of the food trade progressing, food safety continues to warrant widespread attention. Foodborne diseases caused by contaminated food, including foodborne pathogens, seriously threaten public health and the economy. This has led to the development of more sensitive and accurate methods for detecting pathogenic bacteria. Many signal amplification techniques have been used to improve the sensitivity of foodborne pathogen detection. Among them, hybridization chain reaction (HCR), an isothermal nucleic acid hybridization signal amplification technique, has received increasing attention due to its enzyme-free and isothermal characteristics, and pathogenic bacteria detection methods using HCR for signal amplification have experienced rapid development in the last five years. In this review, we first describe the development of detection technologies for food contaminants represented by pathogens and introduce the fundamental principles, classifications, and characteristics of HCR. Furthermore, we highlight the application of various biosensors based on HCR nucleic acid amplification technology in detecting foodborne pathogens. Lastly, we summarize and offer insights into the prospects of HCR technology and its application in pathogen detection.
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Affiliation(s)
- Jinbin Zhao
- School of Medicine, Hunan Normal University, Changsha 410013, China;
- Department of Nutrition and Food Hygiene, School of Public Health, Jilin University, Changchun 130021, China
| | - Yulan Guo
- Department of Nutrition and Food Hygiene, School of Public Health, Jilin University, Changchun 130021, China
| | - Xueer Ma
- Department of Nutrition and Food Hygiene, School of Public Health, Jilin University, Changchun 130021, China
| | - Shitong Liu
- Department of Nutrition and Food Hygiene, School of Public Health, Jilin University, Changchun 130021, China
| | - Chunmeng Sun
- Department of Nutrition and Food Hygiene, School of Public Health, Jilin University, Changchun 130021, China
| | - Ming Cai
- Department of Nutrition and Food Hygiene, School of Public Health, Jilin University, Changchun 130021, China
| | - Yuyang Chi
- Department of Nutrition and Food Hygiene, School of Public Health, Jilin University, Changchun 130021, China
| | - Kun Xu
- School of Medicine, Hunan Normal University, Changsha 410013, China;
- The Research Center of Reproduction and Translational Medicine of Hunan Province, Changsha 410013, China
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2
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Wei G, Zhang W, Cui H, Liao F, Cheng L, Ma G, Fan H, Hong N, Zhang J. Immobilization-free electrochemical DNA sensor based on signal cascade amplification strategy. Biotechnol Appl Biochem 2021; 69:1036-1046. [PMID: 33891320 DOI: 10.1002/bab.2174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 04/12/2021] [Indexed: 11/09/2022]
Abstract
The development of convenient and efficient strategies without using complex nanomaterials or enzymes for signal amplification is very important for bioanalytical applications. Herein, a novel electrochemical DNA sensor was developed by harnessing the signal amplification efficiency of catalytic hairpin assembly (CHA) and a brand-new signal marker tetraferrocene. The prepared sensor had both ends of the probe H2 labeled with tetraferrocene; both ends have a large number of unhybridized T bases, which cause tetraferrocene to move closer to the electrode surface, generating a high-efficiency amplification signal. In the presence of target DNA, it induced strand exchange reactions promoting the formation of double-stranded DNA and recycling of target DNA. Under optimal conditions, the sensor showed a good linear correlation between the peak currents and logarithm of target DNA concentrations (ranging from 0.1 fM to 0.3125 pM) with a detection limit of 0.06 fM, which is obtained by a triple signal-to-noise ratio. Additionally, the prepared sensor possesses excellent selectivity, reproducibility, and stability, demonstrating efficient and stable DNA detection methodology.
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Affiliation(s)
- Guobing Wei
- Department of Pharmacy, JiangXi University of Traditional Chinese Medicine, Nanchang, Jiangxi, China
| | - Wenxing Zhang
- Department of Pharmacy, JiangXi University of Traditional Chinese Medicine, Nanchang, Jiangxi, China
| | - Hanfeng Cui
- Department of Pharmacy, JiangXi University of Traditional Chinese Medicine, Nanchang, Jiangxi, China
| | - Fusheng Liao
- Department of Pharmacy, JiangXi University of Traditional Chinese Medicine, Nanchang, Jiangxi, China
| | - Lin Cheng
- Department of Pharmacy, JiangXi University of Traditional Chinese Medicine, Nanchang, Jiangxi, China
| | - Guangqiang Ma
- Department of Pharmacy, JiangXi University of Traditional Chinese Medicine, Nanchang, Jiangxi, China
| | - Hao Fan
- Department of Pharmacy, JiangXi University of Traditional Chinese Medicine, Nanchang, Jiangxi, China
| | - Nian Hong
- Department of Pharmacy, JiangXi University of Traditional Chinese Medicine, Nanchang, Jiangxi, China
| | - Jing Zhang
- Department of Pharmacy, JiangXi University of Traditional Chinese Medicine, Nanchang, Jiangxi, China
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Ngo LT, Wang WK, Tseng YT, Chang TC, Kuo PL, Chau LK, Huang TT. MutS protein-based fiber optic particle plasmon resonance biosensor for detecting single nucleotide polymorphisms. Anal Bioanal Chem 2021; 413:3329-3337. [PMID: 33712917 DOI: 10.1007/s00216-021-03271-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/08/2021] [Accepted: 03/04/2021] [Indexed: 01/29/2023]
Abstract
A new biosensing method is presented to detect gene mutation by integrating the MutS protein from bacteria with a fiber optic particle plasmon resonance (FOPPR) sensing system. In this method, the MutS protein is conjugated with gold nanoparticles (AuNPs) deposited on an optical fiber core surface. The target double-stranded DNA containing an A and C mismatched base pair in a sample can be captured by the MutS protein, causing increased absorption of green light launching into the fiber and hence a decrease in transmitted light intensity through the fiber. As the signal change is enhanced through consecutive total internal reflections along the fiber, the limit of detection for an AC mismatch heteroduplex DNA can be as low as 0.49 nM. Because a microfluidic chip is used to contain the optical fiber, the narrow channel width allows an analysis time as short as 15 min. Furthermore, the label-free and real-time nature of the FOPPR sensing system enables determination of binding affinity and kinetics between MutS and single-base mismatched DNA. The method has been validated using a heterozygous PCR sample from a patient to determine the allelic fraction. The obtained allelic fraction of 0.474 reasonably agrees with the expected allelic fraction of 0.5. Therefore, the MutS-functionalized FOPPR sensor may potentially provide a convenient quantitative tool to detect single nucleotide polymorphisms in biological samples with a short analysis time at the point-of-care sites.
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Affiliation(s)
- Loan Thi Ngo
- Department of Chemistry and Biochemistry and Center for Nano Bio-Detection, National Chung Cheng University, Chiayi, 62102, Taiwan
| | - Wei-Kai Wang
- Department of Dentistry, Institute of Oral Medicine, Department of Stomatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 70101, Taiwan
| | - Yen-Ta Tseng
- Department of Chemistry and Biochemistry and Center for Nano Bio-Detection, National Chung Cheng University, Chiayi, 62102, Taiwan
| | - Ting-Chou Chang
- Department of Chemistry and Biochemistry and Center for Nano Bio-Detection, National Chung Cheng University, Chiayi, 62102, Taiwan
| | - Pao-Lin Kuo
- Department of Obstetrics Gynecology, National Cheng Kung University Hospital, College of Medicine and Hospital, National Cheng Kung University, Tainan, 70101, Taiwan
| | - Lai-Kwan Chau
- Department of Chemistry and Biochemistry and Center for Nano Bio-Detection, National Chung Cheng University, Chiayi, 62102, Taiwan.
| | - Tze-Ta Huang
- Department of Dentistry, Institute of Oral Medicine, Department of Stomatology, National Cheng Kung University Hospital, College of Medicine, National Cheng Kung University, Tainan, 70101, Taiwan.
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4
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Liu C, Guo L, Zhang B, Lu L. Graphene quantum dots mediated electron transfer in DNA base pairs. RSC Adv 2019; 9:31636-31644. [PMID: 35527930 PMCID: PMC9072722 DOI: 10.1039/c9ra05481b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 09/26/2019] [Indexed: 11/23/2022] Open
Abstract
Graphene quantum dots (GQDs) were connected to [Ru(bpy)3]2+ to sense DNA-mediated charge transfer. Interaction between abasic site double stranded DNA (Abasic-DNA) and [Ru(bpy)3-GQD]2+ was investigated by absorption spectroscopy, gel electrophoresis, circular dichroism, and melting temperature measurements. The results indicate that [Ru(bpy)3-GQD]2+ could be intercalated into double stranded DNA. Using [Ru(bpy)3-GQD]2+ as a signal molecule, the charge transfer performance of DNA-intercalated [Ru(bpy)3-GQD]2+ was determined using electrochemical and electrochemiluminescence measurements. Various DNA types were immobilized on Au electrodes via Au-S bonds. Electrochemiluminescence and electrochemical measurements indicate that [Ru(bpy)3-GQD]2+ could enhance DNA-mediated charge transfer when intercalated into an abasic site of double stranded DNA. And comparing with [Ru(bpy)3]2+, it can be concluded that GQDs intercalate into the DNA duplex by acting as a base analog, thus enhancing DNA charge transfer. These findings suggest that the DNA-GQD structure could aid the development of molecular devices and electric drivers, and broaden the application of DNA charge transfer.
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Affiliation(s)
- Chang Liu
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology Beijing 100124 China
| | - Linqing Guo
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology Beijing 100124 China
| | - Biao Zhang
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology Beijing 100124 China
| | - Liping Lu
- Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology Beijing 100124 China
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5
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Single gold-bridged nanoprobes for identification of single point DNA mutations. Nat Commun 2019; 10:836. [PMID: 30783107 PMCID: PMC6381086 DOI: 10.1038/s41467-019-08769-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Accepted: 01/23/2019] [Indexed: 01/15/2023] Open
Abstract
Consensus ranking of protein affinity to identify point mutations has not been established. Therefore, analytical techniques that can detect subtle variations without interfering with native biomolecular interactions are required. Here we report a rapid method to identify point mutations by a single nanoparticle sensing system. DNA-directed gold crystallization forms rod-like nanoparticles with bridges based on structural design. The nanoparticles enhance Rayleigh light scattering, achieving high refractive-index sensitivity, and enable the system to monitor even a small number of protein-DNA binding events without interference. Analysis of the binding affinity can compile an atlas to distinguish the potential of various point mutations recognized by MutS protein. We use the atlas to analyze the presence and type of single point mutations in BRCA1 from samples of human breast and ovarian cancer cell lines. The strategy of synthesis-by-design of plasmonic nanoparticles for sensors enables direct identification of subtle biomolecular binding distortions and genetic alterations.
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6
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An electrochemical DNA sensor without electrode pre-modification. Biosens Bioelectron 2017; 91:110-114. [DOI: 10.1016/j.bios.2016.10.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Revised: 09/30/2016] [Accepted: 10/03/2016] [Indexed: 01/19/2023]
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7
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Aptamer-graphene oxide for highly sensitive dual electrochemical detection of Plasmodium lactate dehydrogenase. Anal Biochem 2016; 514:32-37. [PMID: 27641111 DOI: 10.1016/j.ab.2016.09.013] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 09/13/2016] [Accepted: 09/14/2016] [Indexed: 01/26/2023]
Abstract
A 90 mer ssDNA aptamer (P38) enriched against Plasmodium falciparum lactate dehydrogenase (PfLDH) through SELEX process was immobilized over glassy carbon electrode (GCE) using graphene oxide (GO) as an immobilization matrix, and the modified electrode was investigated for detection of PfLDH. The GO was synthesized from powdered pencil graphite and characterized by XRD based on the increased interlayer distance between graphitic layers from 0.345 nm for graphite to 0.829 nm for GO. The immobilization of P38 on GO was confirmed by ID/IG intensity ratio in Raman spectra where, the ratio were 0.67, 0.915, and 1.35 for graphite, GO and P38-GO, respectively. The formation of the P38 layer over GO-GCE was evident from an increase in the surface height in AFM analysis of the electrode from ∼3.5 nm for GO-GCE to ∼27 nm for P38-GO-GCE. The developed aptasensor when challenged with the target, a detection of as low as 0.5 fM of PfLDH was demonstrated. The specificity of the aptasensor was confirmed through a voltametric measurement at 0.65 V of the reduced co-factor generated from the PfLDH catalysis. Studies on interference from some common proteins, storage stability, repeatability and analysis of real samples demonstrated the practical application potential of the aptasensor.
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8
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Lahiri H, Mishra S, Mana T, Mukhopadhyay R. Discriminating unalike single nucleobase mismatches using a molecularly resolved, label-free, interfacial LNA-based assay. Analyst 2016; 141:4035-43. [DOI: 10.1039/c6an00484a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Molecularly resolved, label-free discrimination of different types of single nucleobase mismatches by LNA probes.
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Affiliation(s)
- Hiya Lahiri
- Department of Biological Chemistry
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Sourav Mishra
- Department of Biological Chemistry
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Tanushree Mana
- Department of Biological Chemistry
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
| | - Rupa Mukhopadhyay
- Department of Biological Chemistry
- Indian Association for the Cultivation of Science
- Kolkata 700 032
- India
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9
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Jeong B, Akter R, Choi JS, Rahman MA. Highly Sensitive Voltammetric Thrombin Aptamer Sensor Based on the Synergistic Effect of Doping/Depositing Gold Nanoparticles in Polydopamine Film. ELECTROANAL 2015. [DOI: 10.1002/elan.201500271] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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10
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Li R, Liu Y, Cheng L, Yang C, Zhang J. Photoelectrochemical aptasensing of kanamycin using visible light-activated carbon nitride and graphene oxide nanocomposites. Anal Chem 2014; 86:9372-5. [PMID: 25219771 DOI: 10.1021/ac502616n] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Photoactive material and recognition element are two crucial factors which determine the sensitivity and selectivity of the photoelectrochemical (PEC) sensor. Herein we developed a novel PEC aptamer sensor for the specific detection of kanamycin using water-dispersible graphite-like carbon nitride (w-g-C3N4) as visible light-active material and aptamer as the biorecognition element. While a suitable amount of graphene oxide (GO) was doped in w-g-C3N4, the visible light photocurrent response was enhanced, which was beneficial to the construction of PEC sensor. On the other hand, the large specific surface area and π-conjugated structure of GO/w-g-C3N4 provided an excellent platform for immobilizing the kanamycin-binding DNA aptamer on the surface of the sensor via π-π stacking interaction. On such a sensor, the capture of kanamycin molecules by aptamer resulted in increased photocurrent. The PEC response of the sensor was found to be linearly proportional to the concentration of kanamycin in the range from 1 nM to 230 nM with a detection limit (3S/N) of 0.2 nM. Moreover, the proposed sensor displayed high selectivity, good reproducibility, and high stability, demonstrating the successful combination of GO/w-g-C3N4 with aptamer in fabricating high performance PEC sensors.
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Affiliation(s)
- Ruizhen Li
- School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology , Wuhan 430074, China
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11
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Li M, Wang Y, Zhang Y, Yu J, Ge S, Yan M. Graphene functionalized porous Au-paper based electrochemiluminescence device for detection of DNA using luminescent silver nanoparticles coated calcium carbonate/carboxymethyl chitosan hybrid microspheres as labels. Biosens Bioelectron 2014; 59:307-13. [DOI: 10.1016/j.bios.2014.03.072] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Revised: 03/17/2014] [Accepted: 03/31/2014] [Indexed: 11/25/2022]
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12
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Kayran YU, Ozkan-Ariksoysal D, Tezcanli B, Kosova B, Ozsoz M. A Ready-to-Use Electrochemical Kit Design for the Diagnosis of Single Nucleotide Polymorphisms. ELECTROANAL 2013. [DOI: 10.1002/elan.201300386] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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13
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Chandra P, Noh HB, Shim YB. Cancer cell detection based on the interaction between an anticancer drug and cell membrane components. Chem Commun (Camb) 2013; 49:1900-2. [PMID: 23296144 DOI: 10.1039/c2cc38235k] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Simple and general cancer cell detection methods are required in point-of-care diagnostics. Herein, the interaction between an anticancer drug, daunomycin, and cancer cell membrane components has been studied using an aptamer probe immobilized on a conducting polymer-gold nanoparticle composite film through electrochemical and fluorescence methods and applied to the quantitative detection of cancer cells. The developed method differentiates between cancerous and noncancerous cells effectively.
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Affiliation(s)
- Pranjal Chandra
- Department of Chemistry and Institute of Bio-Physico Sensor Technology, Pusan National University, Busan 609-735, South Korea
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14
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Endonuclease cleavage combined with horseradish peroxidase-assisted signal amplification for electrochemical monitoring of DNA. Electrochem commun 2012. [DOI: 10.1016/j.elecom.2012.06.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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15
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Xu H, Wang L, Ye H, Yu L, Zhu X, Lin Z, Wu G, Li X, Liu X, Chen G. An ultrasensitive electrochemical impedance sensor for a special BRCA1 breast cancer gene sequence based on lambda exonuclease assisted target recycling amplification. Chem Commun (Camb) 2012; 48:6390. [PMID: 22617257 DOI: 10.1039/c2cc31588b] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
A label-free, target recycling electrochemical impedance spectroscopy (EIS) DNA sensor has been developed for detection of a model related to the BRCA1 breast cancer gene with a detection limit of 0.05 nM.
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Affiliation(s)
- Huifeng Xu
- Academy of Integrative Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou, Fujian, P. R. China.
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16
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Lee S, Song KM, Jeon W, Jo H, Shim YB, Ban C. A highly sensitive aptasensor towards Plasmodium lactate dehydrogenase for the diagnosis of malaria. Biosens Bioelectron 2012; 35:291-296. [PMID: 22459583 DOI: 10.1016/j.bios.2012.03.003] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2012] [Revised: 02/28/2012] [Accepted: 03/02/2012] [Indexed: 11/24/2022]
Abstract
Finding a highly sensitive diagnostic technique for malaria has challenged scientists for the last century. In the present study, we identified versatile single-strand DNA aptamers for Plasmodium lactate dehydrogenase (pLDH), a biomarker for malaria, via the Systematic Evolution of Ligands by EXponential enrichment (SELEX). The pLDH aptamers selectively bound to the target proteins with high sensitivity (K(d)=16.8-49.6 nM). The selected aptamers were characterized using an electrophoretic mobility shift assay, a quartz crystal microbalance, a fluorescence assay, and circular dichroism spectroscopy. We also designed a simple aptasensor using electrochemical impedance spectroscopy; both Plasmodium vivax LDH and Plasmodium falciparum LDH were selectively detected with a detection limit of 1 pM. Furthermore, the pLDH aptasensor clearly distinguished between malaria-positive blood samples of two major species (P. vivax and P. falciparum) and a negative control, indicating that it may be a useful tool for the diagnosis, monitoring, and surveillance of malaria.
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Affiliation(s)
- Seonghwan Lee
- Department of Chemistry, Pohang University of Science and Technology, Pohang, Gyeongbuk, 790-784, Republic of Korea
| | - Kyung-Mi Song
- Department of Chemistry, Pohang University of Science and Technology, Pohang, Gyeongbuk, 790-784, Republic of Korea
| | - Weejeong Jeon
- Department of Chemistry, Pohang University of Science and Technology, Pohang, Gyeongbuk, 790-784, Republic of Korea
| | - Hunho Jo
- Department of Chemistry, Pohang University of Science and Technology, Pohang, Gyeongbuk, 790-784, Republic of Korea
| | - Yoon-Bo Shim
- Department of Chemistry, Pusan National University, Busan, 609-735, Republic of Korea
| | - Changill Ban
- Department of Chemistry, Pohang University of Science and Technology, Pohang, Gyeongbuk, 790-784, Republic of Korea.
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17
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Affiliation(s)
- Emil Paleček
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612
65 Brno, Czech Republic
| | - Martin Bartošík
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v.v.i., Kralovopolska 135, 612
65 Brno, Czech Republic
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18
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Detection of the strand exchange reaction using DNAzyme and Thermotoga maritima recombinase A. Anal Biochem 2012; 421:313-20. [DOI: 10.1016/j.ab.2011.11.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2011] [Revised: 10/22/2011] [Accepted: 11/09/2011] [Indexed: 11/23/2022]
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19
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An ionic liquid supported CeO 2 nanoparticles-carbon nanotubes composite-enhanced electrochemical DNA-based sensor for the detection of Pb 2. J Pharm Anal 2011; 1:258-263. [PMID: 29403707 PMCID: PMC5760794 DOI: 10.1016/j.jpha.2011.09.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Accepted: 08/12/2011] [Indexed: 11/22/2022] Open
Abstract
An electrochemical sensor incorporating a signal enhancement for the determination of lead (II) ions (Pb2+) was designed on the basis of the thrombin-binding aptamer (TBA) as a molecular recognition element and ionic liquid supported cerium oxide (CeO2) nanoparticles–carbon nanotubes composite modification. The composite comprises nanoparticles CeO2, multi-wall carbon nanotubes (MWNTs) and hydrophobic room temperature ionic liquid (RTIL) 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4). The electrochemical sensors were fabricated by immersing the CeO2–MWNTs–EMIMBF4 modified glassy carbon electrode (GCE) into the solution of TBA probe. In the presence of Pb2+, the TBA probe could form stable G-quartet structure by the specific binding interactions between Pb2+ and TBA. The TBA-bound Pb2+ can be electrochemically reduced, which provides a readout signal for quantitative detection of Pb2+. The reduction peak current is linearly related to the concentration of Pb2+ from 1.0×10–8 M to 1.0×10–5 M with a detection limit of 5×10–9 M. This work demonstrates that the CeO2–MWNTs–EMIMBF4 nanocomposite modified GCE provides a promising platform for immobilizing the TBA probe and enhancing the sensitivity of the DNA-based sensors.
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Thiruppathiraja C, Kamatchiammal S, Adaikkappan P, Santhosh DJ, Alagar M. Specific detection of Mycobacterium sp. genomic DNA using dual labeled gold nanoparticle based electrochemical biosensor. Anal Biochem 2011; 417:73-9. [DOI: 10.1016/j.ab.2011.05.034] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2011] [Revised: 05/08/2011] [Accepted: 05/21/2011] [Indexed: 11/24/2022]
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21
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A protein-based electrochemical method for label-free characterization of sequence-specific protein–DNA interactions. Electrochim Acta 2011. [DOI: 10.1016/j.electacta.2011.04.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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22
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Zhong G, Liu A, Chen X, Wang K, Lian Z, Liu Q, Chen Y, Du M, Lin X. Electrochemical biosensor based on nanoporous gold electrode for detection of PML/RARα fusion gene. Biosens Bioelectron 2011; 26:3812-7. [DOI: 10.1016/j.bios.2011.02.039] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2010] [Revised: 02/20/2011] [Accepted: 02/22/2011] [Indexed: 10/18/2022]
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23
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Hun X, Chen H, Wang W. A electrogenerated chemiluminescence biosensor for Ramos cancer cell using DNA encapsulated Ru(bpy)₃Cl₂ as signal probe. Biosens Bioelectron 2011; 26:3887-93. [PMID: 21478009 DOI: 10.1016/j.bios.2011.03.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 03/01/2011] [Accepted: 03/01/2011] [Indexed: 11/17/2022]
Abstract
A label-free sensing technology for detection of Ramos cell was developed based on a signal probe Ru(bpy)3Cl2 (Ru) encapsulated by DNA. Gold electrode or magnetic bead as the sensing surface was firstly modified with long-strand DNA with five repeating units. Then two kinds of short-strand DNA are grafted onto the long-strand DNA to form DNA strands A and B (L-A and L-B) through the hybridization, respectively. The addition of aptamer initiates hybridization of L-A and L-B with the aptamer sequence. As the hybridization proceeds, the four kinds of DNA would finally transform into a three-dimensional network structure and the signal probe Ru was encapsulated by DNA simultaneously. When Ramos cells are introduced to interact with the aptamer, the signal probe is released. In order to confirm the generality of this method the ferrocenecarboxylic acid and luminol selected as a signal probe mode were also tested. The Ru used as a signal probe for electrogenerated chemiluminescence (ECL) detection was detailedly studied. With this ECL biosensor, detection limit as low as 58 cells/mL was achieved for Ramos cell. The biosensor also exhibited excellent sensitivity and selectivity.
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Affiliation(s)
- Xu Hun
- State Key Laboratory Base of Eco-chemical Engineering, China; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Huaicheng Chen
- State Key Laboratory Base of Eco-chemical Engineering, China; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
| | - Wei Wang
- State Key Laboratory Base of Eco-chemical Engineering, China; College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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Fan H, Xu Y, Chang Z, Xing R, Wang Q, He P, Fang Y. A non-immobilizing electrochemical DNA sensing strategy with homogenous hybridization based on the host–guest recognition technique. Biosens Bioelectron 2011; 26:2655-9. [DOI: 10.1016/j.bios.2010.02.021] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 02/17/2010] [Accepted: 02/19/2010] [Indexed: 12/28/2022]
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25
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Feng K, Zhao J, Wu ZS, Jiang J, Shen G, Yu R. High-sensitive electrochemical detection of point mutation based on polymerization-induced enzymatic amplification. Biosens Bioelectron 2010; 26:3187-91. [PMID: 21239161 DOI: 10.1016/j.bios.2010.12.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Revised: 12/11/2010] [Accepted: 12/13/2010] [Indexed: 11/27/2022]
Abstract
Here a highly sensitive electrochemical method is described for the detection of point mutation in DNA. Polymerization extension reaction is applied to specifically initiate enzymatic electrochemical amplification to improve the sensitivity and enhance the performance of point mutation detection. In this work, 5'-thiolated DNA probe sequences complementary to the wild target DNA are assembled on the gold electrode. In the presence of wild target DNA, the probe is extended by DNA polymerase over the free segment of target as the template. After washing with NaOH solution, the target DNA is removed while the elongated probe sequence remains on the sensing surface. Via hybridizing to the designed biotin-labeled detection probe, the extended sequence is capable of capturing detection probe. After introducing streptavidin-conjugated alkaline phosphatase (SA-ALP), the specific binding between streptavidin and biotin mediates a catalytic reaction of ascorbic acid 2-phosphate (AA-P) substrate to produce a reducing agent ascorbic acid (AA). Then the silver ions in solution are reduced by AA, leading to the deposition of silver metal onto the electrode surface. The amount of deposited silver which is determined by the amount of wild target can be quantified by the linear sweep voltammetry (LSV). The present approach proved to be capable of detecting the wild target DNA down to a detection limit of 1.0×10(-14) M in a wide target concentration range and identifying -28 site (A to G) of the β-thalassemia gene, demonstrating that this scheme offers a highly sensitive and specific approach for point mutation detection.
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Affiliation(s)
- Kejun Feng
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, China.
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26
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Dual-aptamer-based delivery vehicle of doxorubicin to both PSMA (+) and PSMA (-) prostate cancers. Biomaterials 2010; 32:2124-32. [PMID: 21147500 DOI: 10.1016/j.biomaterials.2010.11.035] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2010] [Accepted: 11/14/2010] [Indexed: 01/15/2023]
Abstract
We have designed a dual-aptamer complex specific to both prostate-specific membrane antigens (PSMA) (+) and (-) prostate cancer cells. In the complex, an A10 RNA aptamer targeting PSMA (+) cells and a DUP-1 peptide aptamer specific to PSMA (-) cells were conjugated through streptavidin. Doxorubicin-loaded onto the stem region of the A10 aptamer was delivered not only to PSMA (+) cells but to PSMA (-) cells, and eventually induced apoptosis in both types of prostate cancer cells. Cell death was monitored by measuring guanine concentration in cells using differential pulse voltammetry (DPV), a simple and rapid electrochemical method, and was further confirmed by directly observing cell morphologies cultured on the transparent indium tin oxide (ITO) glass electrode and checking their viabilities using a trypan blue assay. To investigate the in vivo application of the dual-aptamer system, both A10 and DUP-1 aptamers were immobilized on the surface of thermally cross-linked superparamagnetic iron oxide nanoparticles (TCL-SPION). Selective cell uptakes and effective drug delivery action of these probes were verified by Prussian blue staining and trypan blue staining, respectively.
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27
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Li XM, Fu PY, Liu JM, Zhang SS. Biosensor for multiplex detection of two DNA target sequences using enzyme-functionalized Au nanoparticles as signal amplification. Anal Chim Acta 2010; 673:133-8. [DOI: 10.1016/j.aca.2010.05.034] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2010] [Revised: 05/15/2010] [Accepted: 05/26/2010] [Indexed: 11/29/2022]
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28
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Fan H, Xing R, Wang X, Xu Y, Wang Q, He P, Fang Y. A Host-Guest-Recognition-Based Electrochemical Sensor for Sequence-Specific DNA Detection. ELECTROANAL 2010. [DOI: 10.1002/elan.200900623] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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29
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Li X, Xia J, Li W, Zhang S. Multianalyte electrochemical biosensor based on aptamer- and nanoparticle-integrated bio-barcode amplification. Chem Asian J 2010; 5:294-300. [PMID: 20013991 DOI: 10.1002/asia.200900217] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
In the present work, a signal-on electrochemical sensing strategy for the simultaneous detection of adenosine and thrombin is developed based on switching structures of aptamers. An Au electrode as the sensing surface is modified with two kinds of thiolated capture probes complementary to the linker DNA that contains either an adenosine aptamer or thrombin aptamer. The capture probes hybridize with their corresponding linker DNA, which has prehybridized with the reporter DNA loaded onto the gold nanoparticles (AuNPs). The AuNP contained two kinds of bio-barcode DNA: one is complementary to the linker DNA (reporter), whereas the other is not (signal) and is tagged with different metal sulfide nanoparticles. Thus a "sandwich-type" sensing interface is fabricated for adenosine and thrombin. With the introduction of adenosine and thrombin, the aptamer parts bind with their targets and fold to form the complex structures. As a result, the bio-barcoded AuNPs are released into solution. The metal sulfide nanoparticles are measured by anodic stripping voltammetry (ASV), and the concentrations of adenosine and thrombin are proportional to the signal of either metal ion. With the dual amplification of the bio-barcoded AuNP and the preconcentration of metal ions through ASV technology, detection limits as low as 6.6 x 10(-12) M for adenosine and 1.0 x 10(-12) M for thrombin are achieved. The sensor exhibits excellent selectivity and detectability in biological samples.
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Affiliation(s)
- Xuemei Li
- Key Laboratory of Eco-Chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
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30
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Min K, Song KM, Cho M, Chun YS, Shim YB, Ku JK, Ban C. Simultaneous electrochemical detection of both PSMA (+) and PSMA (-) prostate cancer cells using an RNA/peptide dual-aptamer probe. Chem Commun (Camb) 2010; 46:5566-8. [PMID: 20407731 DOI: 10.1039/c002524k] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using an RNA/peptide dual-aptamer probe, both PSMA (+) and PSMA (-) prostate cancer cells were simultaneously detected by electrochemical impedance spectroscopy. This approach can be applied as a general tool for early diagnosis of prostate cancer.
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Affiliation(s)
- Kyoungin Min
- Department of Chemistry, Pohang University of Science and Technology, San31, Hyoja-dong, Pohang, Gyungbuk, 790-784, South Korea
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31
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Bai YH, Li JY, Xu JJ, Chen HY. Ultrasensitive electrochemical detection of DNA hybridization using Au/Fe3O4 magnetic composites combined with silver enhancement. Analyst 2010; 135:1672-9. [DOI: 10.1039/b923847f] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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32
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Kim S, Kim TG, Byon HR, Shin HJ, Ban C, Choi HC. Recognition of single mismatched DNA using MutS-immobilized carbon nanotube field effect transistor devices. J Phys Chem B 2009; 113:12164-8. [PMID: 19685907 DOI: 10.1021/jp9063559] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Label-free and real-time detections of mismatched dsDNAs are demonstrated using MutS-protein-immobilized, single-walled carbon nanotube field effect transistor (SWNT-FET) devices. The E. coli MutS proteins specifically recognizing mismatched dsDNAs are immobilized on SWNT-FET devices that have been fabricated for high sensitivity using a shadow mask lithographic technique to obtain a thin and wide Schottky contact region. The MutS-immobilized SWNT-FETs have successfully detected 40 base pair dsDNAs having single G-T mismatches at the 20th base pair positions by displaying significant electrical conductance drops at as low as 100 pM concentration. Systematic control experiments have revealed that the signal changes indeed originated from specific recognitions of mismatched DNAs by the immobilized MutS proteins.
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33
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Electrochemical scanning of DNA point mutations via MutS protein-mediated mismatch recognition. Biosens Bioelectron 2009; 24:1955-61. [DOI: 10.1016/j.bios.2008.09.029] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2008] [Revised: 09/11/2008] [Accepted: 09/30/2008] [Indexed: 11/21/2022]
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34
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Zhu X, Lin Z, Chen L, Qiu B, Chen G. A sensitive and specific electrochemiluminescent sensor for lead based on DNAzyme. Chem Commun (Camb) 2009:6050-2. [DOI: 10.1039/b911191c] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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35
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Hu K, Lan D, Li X, Zhang S. Electrochemical DNA Biosensor Based on Nanoporous Gold Electrode and Multifunctional Encoded DNA−Au Bio Bar Codes. Anal Chem 2008; 80:9124-30. [DOI: 10.1021/ac8017197] [Citation(s) in RCA: 279] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Kongcheng Hu
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Dongxiao Lan
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Xuemei Li
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
| | - Shusheng Zhang
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, P. R. China
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36
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Cho M, Kim Y, Han SY, Min K, Rahman MA, Shim YB, Ban C. Detection for folding of the thrombin binding aptamer using label-free electrochemical methods. BMB Rep 2008; 41:126-31. [PMID: 18315948 DOI: 10.5483/bmbrep.2008.41.2.126] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The folding of aptamer immobilized on an Au electrode was successfully detected using label-free electrochemical methods. A thrombin binding DNA aptamer was used as a model system in the presence of various monovalent cations. Impedance spectra showed that the extent to which monovalent cations assist in folding of aptamer is ordered as K(+) > NH(4)(+) > Na(+) > Cs(+). Our XPS analysis also showed that K(+) and NH(4)(+) caused a conformational change of the aptamer in which it forms a stable complex with these monovalent ions. Impedance results for the interaction between aptamer and thrombin indicated that thrombin interacts more with folded aptamer than with unfolded aptamer. The EQCM technique provided a quantitative analysis of these results. In particular, the present impedance results showed that thrombin participates a folding of aptamer to some extent, and XPS analysis confirmed that thrombin stabilizes and induces the folding of aptamer.
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Affiliation(s)
- Minseon Cho
- Department of Chemistry, Pohang University of Science and Technology, Pohang, Korea
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37
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Lisdat F, Schäfer D. The use of electrochemical impedance spectroscopy for biosensing. Anal Bioanal Chem 2008; 391:1555-67. [PMID: 18414837 DOI: 10.1007/s00216-008-1970-7] [Citation(s) in RCA: 439] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2007] [Revised: 02/08/2008] [Accepted: 02/09/2008] [Indexed: 11/30/2022]
Abstract
This review introduces the basic concepts and terms associated with impedance and techniques of measuring impedance. The focus of this review is on the application of this transduction method for sensing purposes. Examples of its use in combination with enzymes, antibodies, DNA and with cells will be described. Important fields of application include immune and nucleic acid analysis. Special attention is devoted to the various electrode design and amplification schemes developed for sensitivity enhancement. Electrolyte insulator semiconductor (EIS) structures will be treated separately.
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Affiliation(s)
- F Lisdat
- Biosystems Technology, Wildau University of Applied Sciences, 15745, Wildau, Germany.
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38
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A simple and direct electrochemical detection of interferon-gamma using its RNA and DNA aptamers. Biosens Bioelectron 2008; 23:1819-24. [PMID: 18406597 DOI: 10.1016/j.bios.2008.02.021] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2007] [Revised: 02/25/2008] [Accepted: 02/25/2008] [Indexed: 11/21/2022]
Abstract
Tuberculosis is the most frequent cause of infection-related death worldwide. We constructed a simple and direct electrochemical sensor to detect interferon (IFN)-gamma, a selective marker for tuberculosis pleurisy, using its RNA and DNA aptamers. IFN-gamma was detected by its 5'-thiol-modified aptamer probe immobilized on the gold electrode. Interaction between IFN-gamma and the aptamer was recorded using electrochemical impedance spectroscopy and quartz crystal microbalance (QCM) with high sensitivity. The RNA-aptamer-based sensor showed a low detection limit of 100 fM, and the DNA-aptamer-based sensor detected IFN-gamma to 1 pM in sodium phosphate buffer. With QCM analysis, the aptamer immobilized on the electrode and IFN-gamma bound to the aptamer probe was quantified. This QCM result shows that IFN-gamma exists in multimeric forms to interact with the aptamers, and the RNA aptamer prefers the high multimeric state of IFN-gamma. Such a preference may describe the low detection limit of the RNA aptamer shown by impedance analysis. In addition, IFN-gamma was detected to 10 pM by the DNA aptamer in fetal bovine serum, a mimicked biological system, which has similar components to pleural fluid.
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39
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Cho M, Han MS, Ban C. Detection of mismatched DNAs via the binding affinity of MutS using a gold nanoparticle-based competitive colorimetric method. Chem Commun (Camb) 2008:4573-5. [DOI: 10.1039/b811346g] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Zhang P, Chu X, Xu X, Shen G, Yu R. Electrochemical detection of point mutation based on surface ligation reaction and biometallization. Biosens Bioelectron 2007; 23:1435-41. [PMID: 18242973 DOI: 10.1016/j.bios.2007.12.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2007] [Revised: 12/10/2007] [Accepted: 12/13/2007] [Indexed: 12/20/2022]
Abstract
A highly sensitive electrochemical method for point mutation detection based on surface enzymatic ligation reaction and biometallization is demonstrated. In this method the surface-immobilized allele-specific probe, complementary to the mutant target, undergoes allele-specific ligation with the 5'-phosphorylated ligation probe in the presence of the mutant oligonucleotide target and E. coli DNA ligase. If there is an allele mismatch, no ligation takes place. After thermal treatment at 90 degrees C, the formed duplex melts apart, which merely allows the ligation product to remain on the electrode surface. Then, biotinylated detection probes hybridize with the ligation product. With the binding of streptavidin-alkaline phosphatase (SA-ALP) to the biotinylated probes, a non-reductive substrate of alkaline phosphatase, ascorbic acid 2-phosphate (AA-P), can be converted into ascorbic acid (AA) at the electrode surface. Silver ions in solution are then reduced by AA, resulting in the deposition of silver metal onto the electrode surface. Linear sweep voltammetry (LSV) is used to detect the amount of deposited silver. The proposed approach has been successfully implemented for the identification of single base mutation in codon 12 of K-ras oncogene target with a detection limit of 80fM, demonstrating that this method provides a highly specific, sensitive and cost-efficient approach for point mutation detection.
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Affiliation(s)
- Peng Zhang
- State Key Laboratory of Chemo/Bio-sensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, PR China
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41
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Paleček E, Ostatná V. Electroactivity of Nonconjugated Proteins and Peptides. Towards Electroanalysis of All Proteins. ELECTROANAL 2007. [DOI: 10.1002/elan.200704033] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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42
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Wu ZS, Guo MM, Zhang SB, Chen CR, Jiang JH, Shen GL, Yu RQ. Reusable electrochemical sensing platform for highly sensitive detection of small molecules based on structure-switching signaling aptamers. Anal Chem 2007; 79:2933-9. [PMID: 17338505 DOI: 10.1021/ac0622936] [Citation(s) in RCA: 141] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aptamers are nucleic acids that have high affinity and selectivity for their target molecules. A target may induce the structure switching from a DNA/DNA duplex to a DNA/target complex. In the present study, a reusable electrochemical sensing platform based on structure-switching signaling aptamers for highly sensitive detection of small molecules is developed using adenosine as a model analyte. A gold electrode is first modified with polytyramine and gold nanoparticles. Then, thiolated capture probe is assembled onto the modified electrode surface via sulfur-gold affinity. Ferrocene (Fc)-labeled aptamer probe, which is designed to hybridize with capture DNA sequence and specifically recognize adenosine, is immobilized on the electrode surface by hybridization reaction. The introduction of adenosine triggers structure switching of the aptamer. As a result, Fc-labeled aptamer probe is forced to dissociate from the sensing interface, resulting in a decrease in redox current. The decrement of peak current is proportional to the amount of adenosine. The present sensing system could provide both a wide linear dynamic range and a low detection limit. In addition, high selectivity, good reproducibility, stability, and reusability are achieved. The recovery test demonstrates the feasibility of the designed sensing system for an adenosine assay.
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Affiliation(s)
- Zai-Sheng Wu
- State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University, Changsha, P. R. China
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43
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Masarík M, Cahová K, Kizek R, Palecek E, Fojta M. Label-free voltammetric detection of single-nucleotide mismatches recognized by the protein MutS. Anal Bioanal Chem 2007; 388:259-70. [PMID: 17333147 DOI: 10.1007/s00216-007-1181-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2007] [Accepted: 02/02/2007] [Indexed: 11/26/2022]
Abstract
MutS, a protein involved in DNA mismatch repair, recognizes mispaired and unpaired bases in duplex DNA. We have previously used MutS in an electrochemical double-surface technique (DST) for in-vitro detection of point mutations in DNA. The DST involved binding of unlabeled MutS to DNA heteroduplexes at the surface of magnetic beads followed by a highly sensitive electrochemical determination of the protein by measurement of a catalytic protein signal (peak H) at mercury electrodes. Detection of MutS using a peak resulting from oxidation of tyrosine and tryptophan residues of the protein at a carbon-paste electrode (CPE) was also possible but was approximately three orders of magnitude less sensitive. In this work we present an optimized technique for ex-situ voltammetric determination of MutS at a CPE. Choice of optimum experimental conditions (pH of supporting electrolyte, square-wave voltammetry settings, etc.) resulted in substantial improvement of the sensitivity of the assay, enabling detection of approximately 140 pg (1.6 fmol protein monomer) MutS in a 5-microL sample. The sensitivity was increased further by acid hydrolysis of the protein before measurement. The hydrolyzed protein was detectable down to 5 pg (approx. 56 amol) MutS in 5 microL solution. By using the DST combined with determination of the bound unlabeled MutS at the CPE we demonstrated selective interactions of the protein with single-base mismatches and discrimination among different base mispairs in 30-mer or 95-mer DNA duplexes. In agreement with previous studies, binding of the protein to the 30-mer substrates followed the trend G:T>>C:A>A:A>C:T>homoduplex. The electrochemical data were confirmed by use of an independent technique-a quartz-crystal microbalance for real-time monitoring of MutS interactions with DNA duplexes containing different base mispairs. By using the electrochemical DST a G:T mismatch was detectable in up to 1000-fold excess of homoduplex DNA.
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Affiliation(s)
- Michal Masarík
- Institute of Biophysics v.v.i., Academy of Sciences of the Czech Republic, Kralovopolska 135, 612 65, Brno, Czech Republic
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