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A folding affinity paper-based electrochemical impedance device for cardiovascular risk assessment. Biosens Bioelectron 2019; 130:389-396. [DOI: 10.1016/j.bios.2018.09.031] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2018] [Revised: 09/01/2018] [Accepted: 09/08/2018] [Indexed: 12/11/2022]
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2
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Zhong G, Lan R, Zhang W, Fu F, Sun Y, Peng H, Chen T, Cai Y, Liu A, Lin J, Lin X. Sensitive electrochemical immunosensor based on three-dimensional nanostructure gold electrode. Int J Nanomedicine 2015; 10:2219-28. [PMID: 25834434 PMCID: PMC4372010 DOI: 10.2147/ijn.s76200] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
A sensitive electrochemical immunosensor was developed for detection of alpha-fetoprotein (AFP) based on a three-dimensional nanostructure gold electrode using a facile, rapid, “green” square-wave oxidation-reduction cycle technique. The resulting three-dimensional gold nanocomposites were characterized by scanning electron microscopy and cyclic voltammetry. A “sandwich-type” detection strategy using an electrochemical immunosensor was employed. Under optimal conditions, a good linear relationship between the current response signal and the AFP concentrations was observed in the range of 10–50 ng/mL with a detection limit of 3 pg/mL. This new immunosensor showed a fast amperometric response and high sensitivity and selectivity. It was successfully used to determine AFP in a human serum sample with a relative standard deviation of <5% (n=5). The proposed immunosensor represents a significant step toward practical application in clinical diagnosis and monitoring of prognosis.
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Affiliation(s)
- Guangxian Zhong
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, People's Republic of China ; Department of Orthopaedics, First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Ruilong Lan
- The Centralab, First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Wenxin Zhang
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, People's Republic of China ; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou, People's Republic of China
| | - Feihuan Fu
- Department of Endocrinology, The County Hospital of Anxi, Anxi, People's Republic of China
| | - Yiming Sun
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, People's Republic of China ; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou, People's Republic of China
| | - Huaping Peng
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, People's Republic of China ; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou, People's Republic of China
| | - Tianbin Chen
- The Centralab, First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Yishan Cai
- Fujian International Travel Healthcare Center, Fujian Entry-Exit Inspection and Quarantine Bureau, Fuzhou, People's Republic of China
| | - Ailin Liu
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, People's Republic of China ; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou, People's Republic of China
| | - Jianhua Lin
- Department of Orthopaedics, First Affiliated Hospital of Fujian Medical University, Fuzhou, People's Republic of China
| | - Xinhua Lin
- Department of Pharmaceutical Analysis, Faculty of Pharmacy, Fujian Medical University, Fuzhou, People's Republic of China ; Nano Medical Technology Research Institute, Fujian Medical University, Fuzhou, People's Republic of China
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3
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Ramesh N, Patnaik A. Tailoring recognition clefts from non-specific recognition matrices in mixed molecular arrays. Analyst 2014; 139:5772-80. [PMID: 25279399 DOI: 10.1039/c4an01120a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Multi-component organic interfaces with molecular-level mixing were prepared by integrating benzoic acid appended thiophene amphiphile [4-(6-(thiophene-3-carbonyloxy)hexyloxy)benzoic acid] (T6BA) and (±)-α-lipoic acid onto the Au surface. On a flat surface with infinite radii of curvature, T6BA and (±)-α-lipoic acid, endowed with chemically distinct end-groups, provided sufficient length mismatch to gain conformational entropy leading to stripe-like patterns when the immiscible ligands co-adsorbed. Good quality multi-component organic interfaces and molecular islands could be fabricated via composition variation of the participating ligands. Host-guest chemistry between benzoic acids and β-cyclodextrin was used to confirm the molecular-level mixing. T6BA and (±)-α-lipoic acid, each being a non-specific recognition matrix for dopamine, could thus be organized into mixed molecular arrays having well defined cavities for guest inclusion. This mixed molecular array behaved as a 'recognition matrix' for dopamine (DA, 15 nm) in the presence of ascorbic acid (AA). The surface patterns described here on a flat surface should in principle be applicable to other geometrical structures like spheres and cylinders. Further, charge transfer through the T6BA self-assembled monolayers depended on the anion type present in the supporting electrolyte, monitored through cyclic voltammetry.
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Affiliation(s)
- Nivarthi Ramesh
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600 036, India.
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4
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Zhang K, Tan T, Fu JJ, Zheng T, Zhu JJ. A novel aptamer-based competition strategy for ultrasensitive electrochemical detection of leukemia cells. Analyst 2014; 138:6323-30. [PMID: 23978949 DOI: 10.1039/c3an01255g] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A robust, nanobiotechnology-based electrochemical cytosensing platform for the detection of acute leukemia cells was developed with high sensitivity, selectivity, acceptable rapidity and excellent extensibility. It utilized the competitive binding of cell-specific aptamers to acute leukemia cells and subsequent voltammetric quantification of the metal signature. Greatly enhanced sensitivity was achieved with dual signal amplification by using Fe3O4 magnetic nanoparticles (MNPs) as carriers to load a large amount of gold nanoparticles (AuNPs) and AuNP-catalyzed silver deposition. The proposed competitive cytosensor showed high sensitivity with a detection limit down to 10 cells. This simple and low-cost electrochemical cytosensing approach offers great promise to extend its application to early detection of human leukemia and possibly to other cancer cells.
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Affiliation(s)
- Kui Zhang
- The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing University, Nanjing, 210008, P. R. China
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5
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Zhong GX, Wang P, Fu FH, Weng SH, Chen W, Li SG, Liu AL, Wu ZY, Zhu X, Lin XH, Lin JH, Xia XH. Electrochemical immunosensor for detection of topoisomerase based on graphene–gold nanocomposites. Talanta 2014; 125:439-45. [DOI: 10.1016/j.talanta.2014.01.037] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Revised: 01/09/2014] [Accepted: 01/11/2014] [Indexed: 12/01/2022]
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6
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Yin C, Lai G, Fu L, Zhang H, Yu A. Ultrasensitive Immunoassay Based on Amplified Inhibition of the Electrochemical Stripping Signal of Silver Nanocomposite by Silica Nanoprobe. ELECTROANAL 2014. [DOI: 10.1002/elan.201300507] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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7
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Plesu N, Kellenberger A, Taranu I, Taranu BO, Popa I. Impedimetric detection of dopamine on poly(3-aminophenylboronic acid) modified skeleton nickel electrodes. REACT FUNCT POLYM 2013. [DOI: 10.1016/j.reactfunctpolym.2013.03.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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8
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Chikungunya virus host range E2 transmembrane deletion mutants induce protective immunity against challenge in C57BL/6J mice. J Virol 2013; 87:6748-57. [PMID: 23552427 DOI: 10.1128/jvi.03357-12] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
A vaccine against Chikungunya virus (ChikV), a reemerging pathogenic arbovirus, has been made by attenuating wild-type (WT) virus via truncation of the transmembrane domain (TMD) of E2 and selecting for host range (HR) mutants. Mice are a standard model system for ChikV disease and display the same symptoms of the disease seen in humans. Groups of mice were inoculated with one of three ChikV HR mutants to determine the ability of each mutant strain to elicit neutralizing antibody and protective immunity upon virus challenge. One mutant, ChikV TM17-2, fulfilled the criteria for a good vaccine candidate. It displayed no reactogenicity at the site of injection, no tissue disease in the foot/ankle and quadriceps, and no evidence of viral persistence in foot/ankle tissues 21 days after infection. Upon challenge with a highly pathogenic strain of ChikV, the mutant blocked viral replication in all tissues tested. This study identified a ChikV HR mutant that grows to high levels in insect cells but was restricted in the ability to assemble virus in mammalian cells in vitro. The study demonstrates that these HR strains are attenuated in the mammalian host and warrant further development as live-attenuated vaccine strains.
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Matharu Z, Bandodkar AJ, Gupta V, Malhotra BD. Fundamentals and application of ordered molecular assemblies to affinity biosensing. Chem Soc Rev 2012; 41:1363-402. [DOI: 10.1039/c1cs15145b] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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10
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Rodriguez-Douton M, Sessoli R, Cornia A. A novel tripodal ligand with organosulfur alligator clips for deposition of tetrairon(III) single-molecule magnets on gold. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.01.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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11
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Apodaca DC, Pernites RB, Ponnapati R, Del Mundo FR, Advincula RC. Electropolymerized Molecularly Imprinted Polymer Film: EIS Sensing of Bisphenol A. Macromolecules 2011. [DOI: 10.1021/ma2010525] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dahlia C. Apodaca
- Department of Chemistry and Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-5003, United States
- Institute of Chemistry, University of the Philippines, Diliman, Quezon City Philippines 1101
| | - Roderick B. Pernites
- Department of Chemistry and Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-5003, United States
| | - Ramakrishna Ponnapati
- Department of Chemistry and Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-5003, United States
| | - Florian R. Del Mundo
- Institute of Chemistry, University of the Philippines, Diliman, Quezon City Philippines 1101
| | - Rigoberto C. Advincula
- Department of Chemistry and Department of Chemical and Biomolecular Engineering, University of Houston, Houston, Texas 77204-5003, United States
- Institute of Chemistry, University of the Philippines, Diliman, Quezon City Philippines 1101
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12
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Cheng TM, Lee TC, Tseng SH, Chu HL, Pan JP, Chang CC. Human haptoglobin phenotypes and concentration determination by nanogold-enhanced electrochemical impedance spectroscopy. NANOTECHNOLOGY 2011; 22:245105. [PMID: 21543834 DOI: 10.1088/0957-4484/22/24/245105] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Haptoglobin (Hp) is an acute phase protein that binds free hemoglobin (Hb), preventing Hb-induced oxidative damage in the vascular system. There are three phenotypes in human Hp, whose heterogeneous polymorphic structures and varying concentrations in plasma have been attributed to the cause of diseases and outcome of clinical treatments. Different phenotypes of Hp may be composed of the same subunits but different copy numbers, rendering their determination difficult by a single procedure. In this study, we have developed a simple, fast, reliable and sensitive method, using label-free nanogold-modified bioprobes coupled with self-development electrochemical impedance spectroscopy (EIS). By this method, probe surface charge transfer resistance is detected. The relative charge transfer resistance ratios for Hp 1-1, Hp 2-1 and Hp 2-2 were characterized. We were able to determine protein size difference within 3 nm, and the linear region of the calibration curve for Hp levels in the range of 90 pg ml(-1) and 90 µg ml(-1) (∼1 fM to 1 pM). We surmise that similar approaches can be used to investigate protein polymorphism and altered protein-protein interaction associated with diseases.
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Affiliation(s)
- Tsai-Mu Cheng
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan, Republic of China
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13
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Apodaca DC, Pernites RB, Del Mundo FR, Advincula RC. Detection of 2,4-dinitrotoluene (DNT) as a model system for nitroaromatic compounds via molecularly imprinted short-alkyl-chain SAMs. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:6768-6779. [PMID: 21534549 DOI: 10.1021/la105128q] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A 2-D molecularly imprinted monolayer (2-D MIM) approach was used to prepare a simple and robust sensor for nitroaromatic compounds with 2,4-dinitrotoluene (DNT) as the model compound, which is a precursor and analog for explosive 2,4,6-trinitrotoluene (TNT). In contrast to studies utilizing long-chain hexadecylmercaptan self-assembled monolayers (SAM)s for sensing, a shorter-chain alkylthiol (i.e., butanethiol SAM) was utilized for DNT detection. The role of the chain length of the coadsorbed alkylthiol was emphasized with a matched template during solution adsorption. Semiempirical PM3 quantum calculations were used to determine the molecular conformation and complexation of the adsorbates. A switching mechanism was invoked on the basis of the ability of the template analyte to alter the packing arrangement of the alkylthiol SAMs near defect sites as influenced by the DNT-ethanol solvent complex. A 2-D MIM was formed on the Au surface electrode of a quartz crystal microbalance (QCM), which was then used to sense various concentrations of the analyte. Interestingly, the 2-D MIM QCM also enabled the selective detection of DNT even in a mixed solution of competing molecules, demonstrating the selectivity figure of merit. Likewise, electrochemical impedance spectroscopy (EIS) data at different concentrations of DNT confirmed the 2-D MIM effectiveness for sensing based on the interfacial conformation and electron-transport properties of the imprinted butanethiol SAM.
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Affiliation(s)
- Dahlia C Apodaca
- Department of Chemistry, University of Houston, Houston, Texas 77204-5003, United States
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14
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Zhang GF, Zhan JY, Li HB. Selective Binding of Carbamate Pesticides by Self-Assembled Monolayers of Calix[4]arene Lipoic Acid: Wettability and Impedance Dual-signal Response. Org Lett 2011; 13:3392-5. [DOI: 10.1021/ol201143z] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gui-Fen Zhang
- Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - Jun-Yan Zhan
- Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
| | - Hai-Bing Li
- Key Laboratory of Pesticide & Chemical Biology (CCNU), Ministry of Education, College of Chemistry, Central China Normal University, Wuhan 430079, P.R. China
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15
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Tang J, Han L, Yu Y, Kang J, Zhang Y. A label-free immunoassay using eggshell membrane as matrix and poly(diallyldimethylammonium chloride) as light-scattering enhancer. LUMINESCENCE 2011; 26:634-9. [DOI: 10.1002/bio.1287] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2010] [Revised: 12/10/2010] [Accepted: 01/28/2011] [Indexed: 11/08/2022]
Affiliation(s)
- Jieli Tang
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
| | - Lu Han
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
| | - Yanhui Yu
- The Second Hospital of Jilin University; Changchun; 130012; People's Republic of China
| | - Jing Kang
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
| | - Yihua Zhang
- College of Chemistry; Jilin University; Changchun; 130012; People's Republic of China
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16
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Park JY, Lee YS, Chang BY, Kim BH, Jeon S, Park SM. Label-free impedimetric sensor for a ribonucleic acid oligomer specific to hepatitis C virus at a self-assembled monolayer-covered electrode. Anal Chem 2011; 82:8342-8. [PMID: 20828200 DOI: 10.1021/ac1019232] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
A ribonucleic acid (RNA) sensor based on hybridization of its peptide nucleic acid (PNA) molecule with a target RNA oligomer of the internal ribosome entry site sequence specific to the hepatitis C virus (HCV) and the electrochemical impedance detection is described. This RNA is one of the most conservative molecules of the whole HCV RNA genome. The ammonium ion terminated PNA molecule was immobilized via its host-guest interactions with the diaza crown ring of 3-thiophene-acetamide-diaza-18-crown-6 synthesized by a simple two-step method, which forms a well-defined self-assembled monolayer (SAM) on gold. Hybridization events of the probe PNA with the target RNA were monitored by measuring charge-transfer resistances for the Fe(CN)(6)(3-/4-) redox probe using Fourier transform electrochemical impedance spectroscopy. The ratio of the resistances of the SAM-covered electrode measured before and after hybridization increased linearly with log[RNA] in the rat liver lysate with a detection limit of about 23 pM.
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Affiliation(s)
- Jin-Young Park
- Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, Gyeongbuk, Korea
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17
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Savage AC, Pikramenou Z. Peptide coated gold nanoparticles that bind lanthanide ions. Chem Commun (Camb) 2011; 47:6431-3. [DOI: 10.1039/c1cc11477h] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Yoshida JI, Nagaki A. Elektrochemische Herstellung von adressierbaren Bibliotheken als Plattform für biologische Assays. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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19
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Yoshida JI, Nagaki A. Building Addressable Libraries as Platforms for Biological Assays by an Electrochemical Method. Angew Chem Int Ed Engl 2010; 49:3720-2. [DOI: 10.1002/anie.201000046] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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20
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Ozoemena KI, Mathebula NS, Pillay J, Toschi G, Verschoor JA. Electron transfer dynamics across self-assembled N-(2-mercaptoethyl) octadecanamide/mycolic acid layers: impedimetric insights into the structural integrity and interaction with anti-mycolic acid antibodies. Phys Chem Chem Phys 2010; 12:345-57. [DOI: 10.1039/b915930d] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Chang BY, Park SM. Electrochemical impedance spectroscopy. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2010; 3:207-29. [PMID: 20636040 DOI: 10.1146/annurev.anchem.012809.102211] [Citation(s) in RCA: 413] [Impact Index Per Article: 29.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
This review describes recent advances in electrochemical impedance spectroscopy (EIS) with an emphasis on its novel applications to various electrochemistry-related problems. Section 1 discusses the development of new EIS techniques to reduce measurement time. For this purpose, various forms of multisine EIS techniques were first developed via a noise signal synthesized by mixing ac waves of various frequencies, followed by fast Fourier transform of the signal and the resulting current. Subsequently, an entirely new concept was introduced in which true white noise was used as an excitation source, followed by Fourier transform of both excitation and response signals. Section 2 describes novel applications of the newly developed techniques to time-resolved impedance measurements as well as to impedance imaging. Section 3 is devoted to recent applications of EIS techniques, specifically traditional measurements in various fields with a special emphasis on biosensor detections.
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Affiliation(s)
- Byoung-Yong Chang
- Department of Chemistry, Pohang University of Science and Technology, Korea.
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Park JY, Park SM. DNA hybridization sensors based on electrochemical impedance spectroscopy as a detection tool. SENSORS 2009; 9:9513-32. [PMID: 22303136 PMCID: PMC3267184 DOI: 10.3390/s91209513] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2009] [Revised: 10/28/2009] [Accepted: 11/11/2009] [Indexed: 12/18/2022]
Abstract
Recent advances in label free DNA hybridization sensors employing electrochemical impedance spectroscopy (EIS) as a detection tool are reviewed. These sensors are based on the modulation of the blocking ability of an electrode modified with a probe DNA by an analyte, i.e., target DNA. The probe DNA is immobilized on a self-assembled monolayer, a conducting polymer film, or a layer of nanostructures on the electrode such that desired probe DNA would selectively hybridize with target DNA. The rate of charge transfer from the electrode thus modified to a redox indicator, e.g., [Fe(CN)6]3−/4−, which is measured by EIS in the form of charge transfer resistance (Rct), is modulated by whether or not, as well as how much, the intended target DNA is selectively hybridized. Efforts made to enhance the selectivity as well as the sensitivity of DNA sensors and to reduce the EIS measurement time are briefly described along with brief future perspectives in developing DNA sensors.
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Affiliation(s)
- Jin-Young Park
- Department of Chemistry, Pohang University of Science & Technology, Pohang 790-784, Korea; E-Mail:
| | - Su-Moon Park
- Interdisciplinary School of Green Energy Engineering, Ulsan National Institute of Science & Technology, Ulsan 689-805, Korea
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +82-52-217-2916; Fax: +82-52-217-2909
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Hu L, Bartels JL, Bartels JW, Maurer K, Moeller KD. A New Porous Reaction Layer for Developing Addressable Molecular Libraries. J Am Chem Soc 2009; 131:16638-9. [DOI: 10.1021/ja907000m] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Libo Hu
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, and CombiMatrix Corporation, 6500 Harbor Heights Parkway, Suite 301, Mukilteo, Washington 98275
| | - Jennifer L. Bartels
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, and CombiMatrix Corporation, 6500 Harbor Heights Parkway, Suite 301, Mukilteo, Washington 98275
| | - Jeremy W. Bartels
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, and CombiMatrix Corporation, 6500 Harbor Heights Parkway, Suite 301, Mukilteo, Washington 98275
| | - Karl Maurer
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, and CombiMatrix Corporation, 6500 Harbor Heights Parkway, Suite 301, Mukilteo, Washington 98275
| | - Kevin D. Moeller
- Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, and CombiMatrix Corporation, 6500 Harbor Heights Parkway, Suite 301, Mukilteo, Washington 98275
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Yeo J, Park JY, Bae WJ, Lee YS, Kim BH, Cho Y, Park SM. Label-free electrochemical detection of the p53 core domain protein on its antibody immobilized electrode. Anal Chem 2009; 81:4770-7. [PMID: 19435284 DOI: 10.1021/ac900301h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
We report quantitative results on interactions between a tumor suppressor protein, p53, also known as a prognostic cancer marker, and its antibody. The p53 antibody molecules immobilized on an (R)-lipo-diaza-18-crown-6 self-assembled monolayer (SAM)-modified gold disk electrode were shown to effectively capture the p53 protein by Western blot, quartz crystal microbalance, and electrochemical impedance experiments. The p53 protein thus captured modulated the ability of the electrode for charge transfer to and from a redox probe in the solution in a p53 concentration range of approximately 0.1-30 microg/mL. The same interaction was also observed in the human embryonic kidney cell lysate, demonstrating that the SAM-modified electrode can serve as a selective platform for electrochemically monitoring the cellular p53 concentration.
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Affiliation(s)
- Jongchan Yeo
- Department of Chemistry, Center for Integrated Molecular Systems, Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea
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25
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Shervedani RK, Bagherzadeh M, Sabzyan H, Safari R. One-impedance for one-concentration impedimetry as an electrochemical method for determination of the trace zirconium ion. J Electroanal Chem (Lausanne) 2009. [DOI: 10.1016/j.jelechem.2009.05.012] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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Park JY, Lee YS, Chang BY, Karthikeyan S, Kim KS, Kim BH, Park SM. (R)-Lipo-Diaza-18-Crown-6 Self-Assembled Monolayer as a Selective Serotonin Receptor. Anal Chem 2009; 81:3843-50. [DOI: 10.1021/ac900220n] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Jin-Young Park
- Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology, Pohang 790-784, Korea, and School of Energy Engineering, Ulsan Institute of Science & Technology, Ulsan 689-805, Korea
| | - Yoon-Suk Lee
- Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology, Pohang 790-784, Korea, and School of Energy Engineering, Ulsan Institute of Science & Technology, Ulsan 689-805, Korea
| | - Byoung-Yong Chang
- Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology, Pohang 790-784, Korea, and School of Energy Engineering, Ulsan Institute of Science & Technology, Ulsan 689-805, Korea
| | - S. Karthikeyan
- Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology, Pohang 790-784, Korea, and School of Energy Engineering, Ulsan Institute of Science & Technology, Ulsan 689-805, Korea
| | - Kwang S. Kim
- Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology, Pohang 790-784, Korea, and School of Energy Engineering, Ulsan Institute of Science & Technology, Ulsan 689-805, Korea
| | - Byeang Hyean Kim
- Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology, Pohang 790-784, Korea, and School of Energy Engineering, Ulsan Institute of Science & Technology, Ulsan 689-805, Korea
| | - Su-Moon Park
- Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology, Pohang 790-784, Korea, and School of Energy Engineering, Ulsan Institute of Science & Technology, Ulsan 689-805, Korea
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27
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Yang M, Wang C. Label-free immunosensor based on gold nanoparticle silver enhancement. Anal Biochem 2008; 385:128-31. [PMID: 18992214 DOI: 10.1016/j.ab.2008.10.019] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2008] [Revised: 10/10/2008] [Accepted: 10/13/2008] [Indexed: 10/21/2022]
Abstract
A label-free immunosensor for the sensitive detection of human immunoglobulin G (IgG) was prepared based on gold nanoparticle-silver enhancement detection with a simple charge-coupled device (CCD) detector. The gold nanoparticles, which were used as nuclei for the deposit of metallic silver and also for the adsorption of antibodies, were immobilized into wells of a 9-well chip. With the addition of silver enhancement buffer, metallic silver will deposit onto gold nanoparticles, causing darkness that can be optically measured by the CCD camera and quantified using ImageJ software. When antibody was immobilized onto the gold nanoparticles and antigen was captured, the formed immunocomplex resulted in a decrease of the darkness and the intensity of the darkness was in line with IgG concentrations from 0.05 to 10 ng/ml. The CCD detector is simple and portable, and the reported method has many desirable merits such as sensitivity and accuracy, making it a promising technique for protein detection.
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Affiliation(s)
- Minghui Yang
- Center for Advanced Sensor Technology, University of Maryland, Baltimore County, MD 21250, USA
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28
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Park JY, Chang BY, Nam H, Park SM. Selective electrochemical sensing of glycated hemoglobin (HbA1c) on thiophene-3-boronic acid self-assembled monolayer covered gold electrodes. Anal Chem 2008; 80:8035-44. [PMID: 18826248 DOI: 10.1021/ac8010439] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report a novel concept of sensing glycated hemoglobin, HbA 1c, which is now the most important index for a long-term average blood glucose level, by first selectively immobilizing it on the thiophene-3-boronic acid (T3BA) self-assembled monolayer (SAM)-covered gold electrode by a selective chemical reaction with boronic acid. HbA 1c thus immobilized is then detected by the label-free electrochemical impedance spectroscopic (EIS) measurements with a redox probe, an equimolar mixture of K 3Fe(CN) 6 and K 4Fe(CN) 6, present. The rate of charge transfer between the electrode and the redox probe is shown to be modulated by the amount of HbA 1c in the matrix hemoglobin solution due to the blocking effect caused by the binding of HbA 1c with boronic acid. Both the formation of a well-defined T3BA-SAM on the gold surface and the chemical binding of its boronic acid with HbA 1c in solution were confirmed by quartz crystal microbalance, atomic force microscopy, and EIS experiments.
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Affiliation(s)
- Jin-Young Park
- Department of Chemistry and Center for Integrated Molecular Systems, Pohang University of Science and Technology, Pohang, Gyeongbuk 790-784, Korea
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