1
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Lincon A, Das S, DasGupta S. Capturing protein denaturation using electrical impedance technique. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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2
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Loew N, Watanabe H, Shitanda I, Itagaki M. Electrochemical impedance spectroscopy: Simultaneous detection of different diffusion behaviors as seen in finite element method simulations of mediator-type enzyme electrodes. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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3
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Yaghoobi A, Abiri R, Alvandi A, Arkan E, Mohammadi G, Farshadnia T, Jalalvand AR. An efficiently engineered electrochemical biosensor as a novel and user-friendly electronic device for biosensing of Streptococcus Pneumoniae bacteria. SENSING AND BIO-SENSING RESEARCH 2022. [DOI: 10.1016/j.sbsr.2022.100494] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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4
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Robinson A, Jain A, Rahman R, Abayzeed S, Hague RJM, Rawson FJ. Impedimetric Characterization of Bipolar Nanoelectrodes with Cancer Cells. ACS OMEGA 2021; 6:29495-29505. [PMID: 34778621 PMCID: PMC8581971 DOI: 10.1021/acsomega.1c03547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
Merging of electronics with biology, defined as bioelectronics, at the nanoscale holds considerable promise for sensing and modulating cellular behavior. Advancing our understanding of nanobioelectronics will facilitate development and enable applications in biosensing, tissue engineering, and bioelectronic medicine. However, studies investigating the electrical effects when merging wireless conductive nanoelectrodes with biology are lacking. Consequently, a tool is required to develop a greater understanding of merging conductive nanoparticles with cells. Herein, this challenge is addressed by developing an impedimetric method to evaluate bipolar electrode (BPE) systems that could report on electrical input. A theoretical framework is provided, using impedance to determine if conductive nanoparticles can be polarized and used to drive current. It is then demonstrated that 125 nm of gold nanoparticle (AuNP) bipolar electrodes (BPEs) could be sensed in the presence of cells when incorporated intracellularly at 500 μg/mL using water and phosphate-buffered saline (PBS) as electrolytes. These results highlight how nanoscale BPEs act within biological systems. This research will impact the rational design of using BPE systems in cells for both sensing and actuating applications.
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Affiliation(s)
- Andie
J. Robinson
- Regenerative
Medicine and Cellular Therapies, Biodiscovery Institute, School of
Pharmacy, University of Nottingham, Nottingham NG7 2RD, U.K.
| | - Akhil Jain
- Regenerative
Medicine and Cellular Therapies, Biodiscovery Institute, School of
Pharmacy, University of Nottingham, Nottingham NG7 2RD, U.K.
| | - Ruman Rahman
- Children’s
Brain Tumour Research Centre (CBTRC), Biodiscovery Institute, School
of Medicine, University of Nottingham, Nottingham NG7 2RD, U.K.
| | - Sidahmed Abayzeed
- Optics
and Photonics Research Group, Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, U.K.
| | - Richard J. M. Hague
- Centre
for Additive Manufacturing, Faculty of Engineering, University of Nottingham, Nottingham NG8 1BB, U.K.
| | - Frankie J. Rawson
- Regenerative
Medicine and Cellular Therapies, Biodiscovery Institute, School of
Pharmacy, University of Nottingham, Nottingham NG7 2RD, U.K.
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5
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Bonini A, Poma N, Vivaldi F, Biagini D, Bottai D, Tavanti A, Di Francesco F. A label-free impedance biosensing assay based on CRISPR/Cas12a collateral activity for bacterial DNA detection. J Pharm Biomed Anal 2021; 204:114268. [PMID: 34298471 DOI: 10.1016/j.jpba.2021.114268] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 07/10/2021] [Accepted: 07/12/2021] [Indexed: 12/26/2022]
Abstract
The rapid and selective identification in the clinical setting of pathogenic bacteria causing healthcare associated infections (HAIs) and in particular blood stream infections (BSIs) is a major challenge, as the number of people affected worldwide and the associated mortality are on the rise. In fact, traditional laboratory techniques such culture and polymerase chain reaction (PCR)-based methodologies are often associated to long turnaround times, which justify the pressing need for the development of rapid, specific and portable point of care devices. The recently discovered clustered regularly interspaced short palindromic repeat loci (CRISPR) and the new class of programmable endonuclease enzymes called CRISPR associated proteins (Cas) have revolutionised molecular diagnostics. The use of Cas proteins in optical and electrochemical biosensing devices has significantly improved the detection of nucleic acids in clinical samples. In this study, a CRISPR/Cas12a system was coupled with electrochemical impedance spectroscopy (EIS) measurements to develop a label-free biosensing assay for the detection of Escherichia coli and Staphylococcus aureus, two bacterial species commonly associated to BSI infections. The programmable Cas12a endonuclease activity, induced by a specific guide RNA (gRNA), and the triggered collateral activity were assessed in in vitro restriction analyses, and evaluated thanks to impedance measurements using a modified gold electrode. The Cas12a/gRNA system was able to specifically recognize amplicons from different clinical isolates of E. coli and S. aureus with a limit of detection of 3 nM and a short turnaround time approximately of 1.5 h. To the best of our knowledge, this is the first biosensing device based on CRISPR/Cas12a label free impedance assay.
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Affiliation(s)
- Andrea Bonini
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, Pisa, Italy.
| | - Noemi Poma
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, Pisa, Italy.
| | - Federico Vivaldi
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, Pisa, Italy; Institute of Clinical Physiology, National Research Council, Via G. Moruzzi 1, Pisa, Italy.
| | - Denise Biagini
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, Pisa, Italy.
| | - Daria Bottai
- Department of Biology, University of Pisa, Via San Zeno 35-39, Pisa, Italy.
| | - Arianna Tavanti
- Department of Biology, University of Pisa, Via San Zeno 35-39, Pisa, Italy.
| | - Fabio Di Francesco
- Department of Chemistry and Industrial Chemistry, University of Pisa, Via G. Moruzzi 13, Pisa, Italy; INSTM, Via G. Giusti 9, Florence, Italy.
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6
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Development of Electrochemical DNA Biosensor for Equine Hindgut Acidosis Detection. SENSORS 2021; 21:s21072319. [PMID: 33810389 PMCID: PMC8037926 DOI: 10.3390/s21072319] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 02/16/2021] [Accepted: 02/23/2021] [Indexed: 12/20/2022]
Abstract
The pH drop in the hindgut of the horse is caused by lactic acid-producing bacteria which are abundant when a horse’s feeding regime is excessively carbohydrate rich. This drop in pH below six causes hindgut acidosis and may lead to laminitis. Lactic acid-producing bacteria Streptococcus equinus and Mitsuokella jalaludinii have been found to produce high amounts of L-lactate and D-lactate, respectively. Early detection of increased levels of these bacteria could allow the horse owner to tailor the horse’s diet to avoid hindgut acidosis and subsequent laminitis. Therefore, 16s ribosomal ribonucleic acid (rRNA) sequences were identified and modified to obtain target single stranded deoxyribonucleic acid (DNA) from these bacteria. Complementary single stranded DNAs were designed from the modified target sequences to form capture probes. Binding between capture probe and target single stranded deoxyribonucleic acid (ssDNA) in solution has been studied by gel electrophoresis. Among pairs of different capture probes and target single stranded DNA, hybridization of Streptococcus equinus capture probe 1 (SECP1) and Streptococcus equinus target 1 (SET1) was portrayed as gel electrophoresis. Adsorptive stripping voltammetry was utilized to study the binding of thiol modified SECP1 over gold on glass substrates and these studies showed a consistent binding signal of thiol modified SECP1 and their hybridization with SET1 over the gold working electrode. Cyclic voltammetry and electrochemical impedance spectroscopy were employed to examine the binding of thiol modified SECP1 on the gold working electrode and hybridization of thiol modified SECP1 with the target single stranded DNA. Both demonstrated the gold working electrode surface was modified with a capture probe layer and hybridization of the thiol bound ssDNA probe with target DNA was indicated. Therefore, the proposed electrochemical biosensor has the potential to be used for the detection of the non-synthetic bacterial DNA target responsible for equine hindgut acidosis.
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7
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Nakatsuka N, Faillétaz A, Eggemann D, Forró C, Vörös J, Momotenko D. Aptamer Conformational Change Enables Serotonin Biosensing with Nanopipettes. Anal Chem 2021; 93:4033-4041. [PMID: 33596063 DOI: 10.1021/acs.analchem.0c05038] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We report artificial nanopores in the form of quartz nanopipettes with ca. 10 nm orifices functionalized with molecular recognition elements termed aptamers that reversibly recognize serotonin with high specificity and selectivity. Nanoscale confinement of ion fluxes, analyte-specific aptamer conformational changes, and related surface charge variations enable serotonin sensing. We demonstrate detection of physiologically relevant serotonin amounts in complex environments such as neurobasal media, in which neurons are cultured in vitro. In addition to sensing in physiologically relevant matrices with high sensitivity (picomolar detection limits), we interrogate the detection mechanism via complementary techniques such as quartz crystal microbalance with dissipation monitoring and electrochemical impedance spectroscopy. Moreover, we provide a novel theoretical model for structure-switching aptamer-modified nanopipette systems that supports experimental findings. Validation of specific and selective small-molecule detection, in parallel with mechanistic investigations, demonstrates the potential of conformationally changing aptamer-modified nanopipettes as rapid, label-free, and translatable nanotools for diverse biological systems.
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Affiliation(s)
- Nako Nakatsuka
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
| | - Alix Faillétaz
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
| | - Dominic Eggemann
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
| | - Csaba Forró
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
| | - János Vörös
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
| | - Dmitry Momotenko
- Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich CH-8092, Switzerland
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8
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Khristunova E, Dorozhko E, Korotkova E, Kratochvil B, Vyskocil V, Barek J. Label-Free Electrochemical Biosensors for the Determination of Flaviviruses: Dengue, Zika, and Japanese Encephalitis. SENSORS (BASEL, SWITZERLAND) 2020; 20:E4600. [PMID: 32824351 PMCID: PMC7472106 DOI: 10.3390/s20164600] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 08/11/2020] [Accepted: 08/13/2020] [Indexed: 02/07/2023]
Abstract
A highly effective way to improve prognosis of viral infectious diseases and to determine the outcome of infection is early, fast, simple, and efficient diagnosis of viral pathogens in biological fluids. Among a wide range of viral pathogens, Flaviviruses attract a special attention. Flavivirus genus includes more than 70 viruses, the most familiar being dengue virus (DENV), Zika virus (ZIKV), and Japanese encephalitis virus (JEV). Haemorrhagic and encephalitis diseases are the most common severe consequences of flaviviral infection. Currently, increasing attention is being paid to the development of electrochemical immunological methods for the determination of Flaviviruses. This review critically compares and evaluates recent research progress in electrochemical biosensing of DENV, ZIKV, and JEV without labelling. Specific attention is paid to comparison of detection strategies, electrode materials, and analytical characteristics. The potential of so far developed biosensors is discussed together with an outlook for further development in this field.
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Affiliation(s)
- Ekaterina Khristunova
- School of Earth Sciences and Engineering, Department of Chemical Engineering, National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia; (E.K.); (E.D.); (E.K.); (B.K.)
- UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Faculty of Science, Charles University, Albertov 6, 12843 Prague 2, Czech Republic;
- Department of Solid State Chemistry, University of Chemistry and Technology, Prague, Technicka 5, 16628 Prague 6, Czech Republic
| | - Elena Dorozhko
- School of Earth Sciences and Engineering, Department of Chemical Engineering, National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia; (E.K.); (E.D.); (E.K.); (B.K.)
| | - Elena Korotkova
- School of Earth Sciences and Engineering, Department of Chemical Engineering, National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia; (E.K.); (E.D.); (E.K.); (B.K.)
| | - Bohumil Kratochvil
- School of Earth Sciences and Engineering, Department of Chemical Engineering, National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia; (E.K.); (E.D.); (E.K.); (B.K.)
- Department of Solid State Chemistry, University of Chemistry and Technology, Prague, Technicka 5, 16628 Prague 6, Czech Republic
| | - Vlastimil Vyskocil
- UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Faculty of Science, Charles University, Albertov 6, 12843 Prague 2, Czech Republic;
| | - Jiri Barek
- School of Earth Sciences and Engineering, Department of Chemical Engineering, National Research Tomsk Polytechnic University, Lenin Avenue 30, 634050 Tomsk, Russia; (E.K.); (E.D.); (E.K.); (B.K.)
- UNESCO Laboratory of Environmental Electrochemistry, Department of Analytical Chemistry, Faculty of Science, Charles University, Albertov 6, 12843 Prague 2, Czech Republic;
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9
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Impact of Self-Assembled Monolayer Design and Electrochemical Factors on Impedance-Based Biosensing. SENSORS 2020; 20:s20082246. [PMID: 32316211 PMCID: PMC7218866 DOI: 10.3390/s20082246] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 04/09/2020] [Accepted: 04/10/2020] [Indexed: 12/11/2022]
Abstract
Real-time sensing of proteins, especially in wearable devices, remains a substantial challenge due to the need to convert a binding event into a measurable signal that is compatible with the chosen analytical instrumentation. Impedance spectroscopy enables real-time detection via either measuring electrostatic interactions or electron transfer reactions while simultaneously being amenable to miniaturization for integration into wearable form-factors. To create a more robust methodology for optimizing impedance-based sensors, additional fundamental studies exploring components influencing the design and implementation of these sensors are needed. This investigation addresses a sub-set of these issues by combining optical and electrochemical characterization to validate impedance-based sensor performance as a function of (1) biorecognition element density, (2) self-assembled monolayer chain length, (3) self-assembled monolayer charge density, (4) the electrochemical sensing mechanism and (5) the redox reporter selection. Using a pre-existing lysozyme aptamer and lysozyme analyte combination, we demonstrate a number of design criteria to advance the state-of-the-art in protein sensing. For this model system we demonstrated the following: First, denser self-assembled monolayers yielded substantially improved sensing results. Second, self-assembled monolayer composition, including both thickness and charge density, changed the observed peak position and peak current. Third, single frequency measurements, while less informative, can be optimized to replace multi-frequency measurements and in some cases (such as that with zwitterionic self-assembled monolayers) are preferred. Finally, various redox reporters traditionally not used in impedance sensing should be further explored. Collectively, these results can help limit bottlenecks associated with device development, enabling realization of next-generation impedance-based biosensing with customize sensor design for the specific application.
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10
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Yuhana Ariffin E, Heng LY, Tan LL, Abd Karim NH, Hasbullah SA. A Highly Sensitive Impedimetric DNA Biosensor Based on Hollow Silica Microspheres for Label-Free Determination of E. coli. SENSORS (BASEL, SWITZERLAND) 2020; 20:E1279. [PMID: 32111092 PMCID: PMC7085554 DOI: 10.3390/s20051279] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 02/19/2020] [Accepted: 02/20/2020] [Indexed: 01/28/2023]
Abstract
A novel label-free electrochemical DNA biosensor was constructed for the determination of Escherichia coli bacteria in environmental water samples. The aminated DNA probe was immobilized onto hollow silica microspheres (HSMs) functionalized with 3-aminopropyltriethoxysilane and deposited onto a screen-printed electrode (SPE) carbon paste with supported gold nanoparticles (AuNPs). The biosensor was optimized for higher specificity and sensitivity. The label-free E. coli DNA biosensor exhibited a dynamic linear response range of 1 × 10-10 µM to 1 × 10-5 µM (R2 = 0.982), with a limit of detection at 1.95 × 10-15 µM, without a redox mediator. The sensitivity of the developed DNA biosensor was comparable to the non-complementary and single-base mismatched DNA. The DNA biosensor demonstrated a stable response up to 21 days of storage at 4 ℃ and pH 7. The DNA biosensor response was regenerable over three successive regeneration and rehybridization cycles.
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Affiliation(s)
- Eda Yuhana Ariffin
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia; (E.Y.A.); (N.H.A.K.); (S.A.H.)
| | - Lee Yook Heng
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia; (E.Y.A.); (N.H.A.K.); (S.A.H.)
| | - Ling Ling Tan
- Southeast Asia Disaster Prevention Research Initiative (SEADPRI-UKM), Institute for Environment and Development (LESTARI), Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia;
| | - Nurul Huda Abd Karim
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia; (E.Y.A.); (N.H.A.K.); (S.A.H.)
| | - Siti Aishah Hasbullah
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia (UKM), 43600 UKM Bangi, Selangor Darul Ehsan, Malaysia; (E.Y.A.); (N.H.A.K.); (S.A.H.)
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11
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Asefifeyzabadi N, Taki M, Funneman M, Song T, Shamsi MH. Unique sequence-dependent properties of trinucleotide repeat monolayers: electrochemical, electrical, and topographic characterization. J Mater Chem B 2020; 8:5225-5233. [DOI: 10.1039/d0tb00507j] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The sequence-dependent properties of the surface-assembled trinucleotide repeat interface on a gold surface were explored by electrochemical methods and surface probe microscopy.
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Affiliation(s)
- Narges Asefifeyzabadi
- Department of Chemistry & Biochemistry
- 1245 Lincoln Dr
- Southern Illinois University at Carbondale
- USA
| | - Motahareh Taki
- Department of Chemistry & Biochemistry
- 1245 Lincoln Dr
- Southern Illinois University at Carbondale
- USA
| | - Madison Funneman
- Department of Chemistry & Biochemistry
- 1245 Lincoln Dr
- Southern Illinois University at Carbondale
- USA
| | - Tingjie Song
- Department of Chemistry
- University of Illinois at Urbana-Champaign
- USA
| | - Mohtashim Hassan Shamsi
- Department of Chemistry & Biochemistry
- 1245 Lincoln Dr
- Southern Illinois University at Carbondale
- USA
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12
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Soares JC, Soares AC, Rodrigues VC, Melendez ME, Santos AC, Faria EF, Reis RM, Carvalho AL, Oliveira ON. Detection of the Prostate Cancer Biomarker PCA3 with Electrochemical and Impedance-Based Biosensors. ACS APPLIED MATERIALS & INTERFACES 2019; 11:46645-46650. [PMID: 31765118 DOI: 10.1021/acsami.9b19180] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Diagnosis of prostate cancer via PCA3 biomarker detection is promising to be much more efficient than with the prostatic specific antigens currently used. In this study, we present the first electrochemical and impedance-based biosensors that are capable of detecting PCA3 down to 0.128 nmol/L. The biosensors were made with a layer of PCA3-complementary single-stranded DNA (ssDNA) probe, immobilized on a layer-by-layer (LbL) film of chitosan (CHT) and carbon nanotubes (MWCNT). They are highly selective to PCA3, which was confirmed in impedance measurements and with polarization-modulated infrared reflection absorption spectroscopy (PM-IRRAS). Using information visualization methods, we could also distinguish between cell lines expressing the endogenous PCA3 long noncoding RNA (lncRNA) from cells that did not contain detectable levels of this biomarker. Since the methods involved in fabrication the biosensors are potentially low cost, one may hope to deploy PCA3 tests in any laboratory of clinical analyses and even for point-of-care diagnostics.
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Affiliation(s)
- Juliana Coatrini Soares
- São Carlos Institute of Physics , University of São Paulo , 13566-590 São Carlos , Brazil
- National Laboratory of Nanotechnology for Agribusiness (LNNA) , Embrapa Instrumentation , 13560-970 São Carlos , Brazil
| | - Andrey Coatrini Soares
- São Carlos Institute of Physics , University of São Paulo , 13566-590 São Carlos , Brazil
- National Laboratory of Nanotechnology for Agribusiness (LNNA) , Embrapa Instrumentation , 13560-970 São Carlos , Brazil
| | | | - Matias Eliseo Melendez
- Molecular Oncology Research Center , Barretos Cancer Hospital , 14784-400 Barretos , Brazil
| | - Alexandre Cesar Santos
- Molecular Oncology Research Center , Barretos Cancer Hospital , 14784-400 Barretos , Brazil
| | - Eliney Ferreira Faria
- Molecular Oncology Research Center , Barretos Cancer Hospital , 14784-400 Barretos , Brazil
| | - Rui M Reis
- Molecular Oncology Research Center , Barretos Cancer Hospital , 14784-400 Barretos , Brazil
- Life and Health Sciences Research Institute (ICVS), School of Medicine , University of Minho , Braga , Portugal
- ICVS/3B's - PT Government Associate Laboratory , Braga/Guimarães , Portugal
| | - Andre Lopes Carvalho
- Molecular Oncology Research Center , Barretos Cancer Hospital , 14784-400 Barretos , Brazil
| | - Osvaldo N Oliveira
- São Carlos Institute of Physics , University of São Paulo , 13566-590 São Carlos , Brazil
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13
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Kumari P, Adeloju SB. Fabrication of a novel DNA affinity biosensor based on hybridisation induced current by electrostatic repulsion of silicotungstic acid as a redox indicator. Talanta 2019; 194:127-133. [DOI: 10.1016/j.talanta.2018.09.074] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 09/15/2018] [Accepted: 09/19/2018] [Indexed: 11/28/2022]
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14
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Butterworth A, Blues E, Williamson P, Cardona M, Gray L, Corrigan DK. SAM Composition and Electrode Roughness Affect Performance of a DNA Biosensor for Antibiotic Resistance. BIOSENSORS-BASEL 2019; 9:bios9010022. [PMID: 30736460 PMCID: PMC6468421 DOI: 10.3390/bios9010022] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 01/29/2019] [Accepted: 02/04/2019] [Indexed: 11/16/2022]
Abstract
Antibiotic resistance is a growing concern in the treatment of infectious disease worldwide. Point-of-care (PoC) assays which rapidly identify antibiotic resistance in a sample will allow for immediate targeted therapy which improves patient outcomes and helps maintain the effectiveness of current antibiotic stockpiles. Electrochemical assays offer many benefits, but translation from a benchtop measurement system to low-cost portable electrodes can be challenging. Using electrochemical and physical techniques, this study examines how different electrode surfaces and bio-recognition elements, i.e. the self-assembled monolayer (SAM), affect the performance of a biosensor measuring the hybridisation of a probe for antibiotic resistance to a target gene sequence in solution. We evaluate several commercially available electrodes which could be suitable for PoC testing with different SAM layers and show that electrode selection also plays an important role in overall biosensor performance.
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Affiliation(s)
- Adrian Butterworth
- Department of Biomedical Engineering, Wolfson Centre, 106 Rottenrow East, University of Strathclyde, Glasgow G1 1XQ, UK.
| | - Elizabeth Blues
- Department of Biomedical Engineering, Wolfson Centre, 106 Rottenrow East, University of Strathclyde, Glasgow G1 1XQ, UK.
| | - Paul Williamson
- Department of Biomedical Engineering, Wolfson Centre, 106 Rottenrow East, University of Strathclyde, Glasgow G1 1XQ, UK.
| | - Milovan Cardona
- Department of Biomedical Engineering, Wolfson Centre, 106 Rottenrow East, University of Strathclyde, Glasgow G1 1XQ, UK.
| | - Louise Gray
- FlexMedical Solutions, Eliburn Industrial Park, Livingston, EH54 6GQ, Scotland, UK.
| | - Damion K Corrigan
- Department of Biomedical Engineering, Wolfson Centre, 106 Rottenrow East, University of Strathclyde, Glasgow G1 1XQ, UK.
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15
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Wang J, Hui N. Zwitterionic poly(carboxybetaine) functionalized conducting polymer polyaniline nanowires for the electrochemical detection of carcinoembryonic antigen in undiluted blood serum. Bioelectrochemistry 2019; 125:90-96. [DOI: 10.1016/j.bioelechem.2018.09.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2018] [Revised: 09/25/2018] [Accepted: 09/28/2018] [Indexed: 12/21/2022]
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16
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Quan Li P, Piper A, Schmueser I, Mount AR, Corrigan DK. Impedimetric measurement of DNA-DNA hybridisation using microelectrodes with different radii for detection of methicillin resistant Staphylococcus aureus (MRSA). Analyst 2018; 142:1946-1952. [PMID: 28492640 DOI: 10.1039/c7an00436b] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Due to their electroanalytical advantages, microelectrodes are a very attractive technology for sensing and monitoring applications. One highly important application is measurement of DNA hybridisation to detect a wide range of clinically important phenomena, including single nucleotide polymorphisms (SNPs), mutations and drug resistance genes. The use of electrochemical impedance spectroscopy (EIS) for measurement of DNA hybridisation is well established for large electrodes but as yet remains relatively unexplored for microelectrodes due to difficulties associated with electrode functionalisation and impedimetric response interpretation. To shed light on this, microelectrodes were initially fabricated using photolithography and characterised electrochemically to ensure their responses matched established theory. Electrodes with different radii (50, 25, 15 and 5 μm) were then functionalised with a mixed film of 6-mercapto-1-hexanol and a thiolated single stranded DNA capture probe for a specific gene from the antibiotic resistant bacterium MRSA. The complementary oligonucleotide target from the mecA MRSA gene was hybridised with the surface tethered ssDNA probe. The EIS response was evaluated as a function of electrode radius and it was found that charge-transfer (RCT) was more significantly affected by hybridisation of the mecA gene than the non-linear resistance (RNL) which is associated with the steady state current. The discrimination of mecA hybridisation improved as electrode radius reduced with the RCT component of the response becoming increasingly dominant for smaller radii. It was possible to utilise these findings to produce a real time measurement of oligonucleotide binding where changes in RCT were evident one minute after nanomolar target addition. These data provide a systematic account of the effect of microelectrode radius on the measurement of hybridisation, providing insight into critical aspects of sensor design and implementation for the measurement of clinically important DNA sequences. The findings open up the possibility of developing rapid, sensitive DNA based measurements using microelectrodes.
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Wang J, Hui N. A nonfouling voltammetric immunosensor for the carcinoembryonic antigen based on the use of polyaniline nanowires wrapped with hyaluronic acid. Mikrochim Acta 2018; 185:329. [DOI: 10.1007/s00604-018-2854-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2018] [Accepted: 05/26/2018] [Indexed: 12/20/2022]
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18
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Heinrich F, Riedel M, Lisdat F. Detection of abasic DNA by means of impedance spectroscopy. Electrochem commun 2018. [DOI: 10.1016/j.elecom.2018.04.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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19
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Ribovski L, Zucolotto V, Janegitz BC. A label-free electrochemical DNA sensor to identify breast cancer susceptibility. Microchem J 2017. [DOI: 10.1016/j.microc.2017.03.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Analysis of the evolution of the detection limits of electrochemical nucleic acid biosensors II. Anal Bioanal Chem 2017; 409:4335-4352. [DOI: 10.1007/s00216-017-0377-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 04/11/2017] [Accepted: 04/21/2017] [Indexed: 01/07/2023]
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21
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Electrospun manganese (III) oxide nanofiber based electrochemical DNA-nanobiosensor for zeptomolar detection of dengue consensus primer. Biosens Bioelectron 2017; 90:378-387. [DOI: 10.1016/j.bios.2016.12.008] [Citation(s) in RCA: 82] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2016] [Revised: 12/01/2016] [Accepted: 12/03/2016] [Indexed: 01/14/2023]
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22
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Karimizefreh A, Mahyari FA, VaezJalali M, Mohammadpour R, Sasanpour P. Impedimetic biosensor for the DNA of the human papilloma virus based on the use of gold nanosheets. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2173-8] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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23
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Corrigan D, Schulze H, Ciani I, Henihan G, Mount A, Bachmann T. Improving performance of a rapid electrochemical MRSA assay: Optimisation of assay conditions to achieve enhanced discrimination of clinically important DNA sequences under ambient conditions. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2016.12.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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24
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Protein self-assembly onto nanodots leads to formation of conductive bio-based hybrids. Sci Rep 2016; 6:38252. [PMID: 27922059 PMCID: PMC5138619 DOI: 10.1038/srep38252] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 11/07/2016] [Indexed: 11/29/2022] Open
Abstract
The next generation of nanowires that could advance the integration of functional nanosystems into synthetic applications from photocatalysis to optical devices need to demonstrate increased ability to promote electron transfer at their interfaces while ensuring optimum quantum confinement. Herein we used the biological recognition and the self-assembly properties of tubulin, a protein involved in building the filaments of cellular microtubules, to create stable, free standing and conductive sulfur-doped carbon nanodots-based conductive bio-hybrids. The physical and chemical properties (e.g., composition, morphology, diameter etc.) of such user-synthesized hybrids were investigated using atomic and spectroscopic techniques, while the electron transfer rate was estimated using peak currents formed during voltammetry scanning. Our results demonstrate the ability to create individually hybrid nanowires capable to reduce energy losses; such hybrids could possibly be used in the future for the advancement and implementation into nanometer-scale functional devices.
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Shang J, Yan J, Zhang Z, Huang X, Maturavongsadit P, Song B, Jia Y, Ma T, Li D, Xu K, Wang Q, Lin Q. A hydrogel-based glucose affinity microsensor. SENSORS AND ACTUATORS. B, CHEMICAL 2016; 237:992-998. [PMID: 27721570 PMCID: PMC5050552 DOI: 10.1016/j.snb.2016.03.146] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We present a hydrogel-based affinity microsensor for continuous glucose measurements. The microsensor is based on microelectromechanical systems (MEMS) technology, and incorporates a synthetic hydrogel that is attached to the device surface via in situ polymerization. Glucose molecules that diffuses into and out of the device binds reversibly with boronic acid groups in the hydrogel via affinity binding, and causes changes in the dielectric properties of the hydrogel, which can be measured using a MEMS capacitive transducer to determine the glucose concentration. The use of the in situ polymerized hydrogel eliminates mechanical moving parts found in other types of affinity microsensors, as well as mechanical barriers such as semipermeable membranes that are otherwise required to hold the glucose-sensitive material. This facilitates the miniaturization and robust operation of the microsensor, and can potentially improve the tolerance of the device, when implanted subcutaneously, to biofouling. Experimental results demonstrate that in a glucose concentration range of 0-500 mg/dL and with a resolution of 0.35 mg/dL or better, the microsensor exhibits a repeatable and reversible response, and can potentially be useful for continuous glucose monitoring in diabetes care.
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Affiliation(s)
- Junyi Shang
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Jing Yan
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA
| | - Zhixing Zhang
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Xian Huang
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Panita Maturavongsadit
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA
| | - Bing Song
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Yuan Jia
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Tieying Ma
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
| | - Dachao Li
- College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China
| | - Kexin Xu
- College of Precision Instrument and Opto-electronics Engineering, Tianjin University, Tianjin, China
| | - Qian Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA
| | - Qiao Lin
- Department of Mechanical Engineering, Columbia University, New York, NY, USA
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Gebala M, La Mantia F, Michaels PE, Ciampi S, Gupta B, Parker SG, Tavallaie R, Gooding JJ. Electric Field Modulation of Silicon upon Tethering of Highly Charged Nucleic Acids. Capacitive Studies on DNA‐modified Silicon (111). ELECTROANAL 2016. [DOI: 10.1002/elan.201600285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Magdalena Gebala
- Analytische Chemie – Elektroanalytik & Sensorik, Ruhr-Universität Bochum Universitätsstr.150 D-44780 Bochum Germany
- Department of Biochemistry Stanford University Stanford CA 94305 USA
| | - Fabio La Mantia
- Energiespeicher- und Energiewandlersysteme Universität Bremen Wiener Str. 12 D-28359 Bremen Germany
| | - Pauline Eugene Michaels
- School of Chemistry and the Australian Centre for NanoMedicine The University of New South Wales Sydney NSW 2052 Australia
| | - Simone Ciampi
- School of Chemistry and the Australian Centre for NanoMedicine The University of New South Wales Sydney NSW 2052 Australia
| | - Bakul Gupta
- School of Chemistry and the Australian Centre for NanoMedicine The University of New South Wales Sydney NSW 2052 Australia
| | - Stephen G. Parker
- School of Chemistry and the Australian Centre for NanoMedicine The University of New South Wales Sydney NSW 2052 Australia
| | - Roya Tavallaie
- School of Chemistry and the Australian Centre for NanoMedicine The University of New South Wales Sydney NSW 2052 Australia
| | - J. Justin Gooding
- School of Chemistry and the Australian Centre for NanoMedicine The University of New South Wales Sydney NSW 2052 Australia
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27
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Obaje EA, Cummins G, Schulze H, Mahmood S, Desmulliez MP, Bachmann TT. Carbon screen-printed electrodes on ceramic substrates for label-free molecular detection of antibiotic resistance. ACTA ACUST UNITED AC 2016. [DOI: 10.1002/jin2.16] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Eleojo A. Obaje
- Division of Infection and Pathway Medicine, Edinburgh Medical School, College of Medicine and Veterinary Medicine; The University of Edinburgh; Chancellor's Building, 49 Little France Crescent Edinburgh EH16 4SB Scotland UK
| | - Gerard Cummins
- School of Engineering and Physical Sciences, MIcroSystems Engineering Centre; Heriot-Watt University; Edinburgh EH14 4AS Scotland UK
| | - Holger Schulze
- Division of Infection and Pathway Medicine, Edinburgh Medical School, College of Medicine and Veterinary Medicine; The University of Edinburgh; Chancellor's Building, 49 Little France Crescent Edinburgh EH16 4SB Scotland UK
| | - Salman Mahmood
- School of Engineering and Physical Sciences, MIcroSystems Engineering Centre; Heriot-Watt University; Edinburgh EH14 4AS Scotland UK
| | - Marc P.Y. Desmulliez
- School of Engineering and Physical Sciences, MIcroSystems Engineering Centre; Heriot-Watt University; Edinburgh EH14 4AS Scotland UK
| | - Till T. Bachmann
- Division of Infection and Pathway Medicine, Edinburgh Medical School, College of Medicine and Veterinary Medicine; The University of Edinburgh; Chancellor's Building, 49 Little France Crescent Edinburgh EH16 4SB Scotland UK
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28
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Izadi Z, Sheikh-Zeinoddin M, Ensafi AA, Soleimanian-Zad S. Fabrication of an electrochemical DNA-based biosensor for Bacillus cereus detection in milk and infant formula. Biosens Bioelectron 2016; 80:582-589. [DOI: 10.1016/j.bios.2016.02.032] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 01/23/2016] [Accepted: 02/10/2016] [Indexed: 11/25/2022]
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29
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Ribeiro WC, Gonçalves LM, Liébana S, Pividori MI, Bueno PR. Molecular conductance of double-stranded DNA evaluated by electrochemical capacitance spectroscopy. NANOSCALE 2016; 8:8931-8938. [PMID: 27074378 DOI: 10.1039/c6nr01076h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Conductance was measured in two different double stranded DNA (both with 20 bases), the more conducting poly(dG)-poly(dC) (ds-DNAc) and the less conducting poly(dA)-poly(dT) (ds-DNAi), by means of Electrochemical Capacitance Spectroscopy (ECS). The use of the ECS approach, exemplified herein with DNA nanowires, is equally a suitable and time-dependent advantageous alternative for conductance measurement of molecular systems, additionally allowing better understanding of the alignment existing between molecular scale conductance and electron transfer rate.
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Affiliation(s)
- W C Ribeiro
- Instituto de Química, Universidade Estadual Paulista, (Nanobionics Research Group), CP 355, 14800-900, Araraquara, SP, Brazil
| | - L M Gonçalves
- Requimte, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto, Porto, Portugal
| | - S Liébana
- Grup de Sensors & Biosensors, Unitat de Química Analítica, Bloc de Ciencias e Biociencias, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - M I Pividori
- Grup de Sensors & Biosensors, Unitat de Química Analítica, Bloc de Ciencias e Biociencias, Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - P R Bueno
- Instituto de Química, Universidade Estadual Paulista, (Nanobionics Research Group), CP 355, 14800-900, Araraquara, SP, Brazil
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30
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Dak P, Ebrahimi A, Swaminathan V, Duarte-Guevara C, Bashir R, Alam MA. Droplet-based Biosensing for Lab-on-a-Chip, Open Microfluidics Platforms. BIOSENSORS 2016; 6:14. [PMID: 27089377 PMCID: PMC4931474 DOI: 10.3390/bios6020014] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Revised: 03/31/2016] [Accepted: 04/09/2016] [Indexed: 01/09/2023]
Abstract
Low cost, portable sensors can transform health care by bringing easily available diagnostic devices to low and middle income population, particularly in developing countries. Sample preparation, analyte handling and labeling are primary cost concerns for traditional lab-based diagnostic systems. Lab-on-a-chip (LoC) platforms based on droplet-based microfluidics promise to integrate and automate these complex and expensive laboratory procedures onto a single chip; the cost will be further reduced if label-free biosensors could be integrated onto the LoC platforms. Here, we review some recent developments of label-free, droplet-based biosensors, compatible with "open" digital microfluidic systems. These low-cost droplet-based biosensors overcome some of the fundamental limitations of the classical sensors, enabling timely diagnosis. We identify the key challenges that must be addressed to make these sensors commercially viable and summarize a number of promising research directions.
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Affiliation(s)
- Piyush Dak
- Purdue University, West Lafayette 47906, IN, USA.
| | | | | | | | - Rashid Bashir
- University of Illinois at Urbana-Champaign, Urbana 61801, IL, USA.
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31
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Vogt S, Su Q, Gutiérrez-Sánchez C, Nöll G. Critical View on Electrochemical Impedance Spectroscopy Using the Ferri/Ferrocyanide Redox Couple at Gold Electrodes. Anal Chem 2016; 88:4383-90. [PMID: 26990929 DOI: 10.1021/acs.analchem.5b04814] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Electrochemical or faradaic impedance spectroscopy (EIS) using the ferri/ferrocyanide couple as a redox probe at gold working electrodes was evaluated with respect to its ability to monitor consecutive surface modification steps. As a model reaction, the reversible hybridization and dehybridization of DNA was studied. Thiol-modified single stranded DNA (ssDNA, 20 bases, capture probe) was chemisorbed to a gold electrode and treated with a solution of short thiols to release nonspecifically adsorbed DNA before hybridization with complementary ssDNA (20 bases, target) was carried out. Reversible dehybridization was achieved by intense rinsing with pure water. The experimental procedures were optimized by kinetic surface plasmon resonance (SPR) and quartz crystal microbalance with dissipation (QCM-D) measurements to maximize the increase in reflectivity or decrease in frequency upon hybridization before hybridization/dehybridization was also monitored by EIS. In contrast to SPR and QCM-D, repeatable EIS measurements were not possible at first. Combined SPR/EIS and QCM-D/EIS measurements revealed that during EIS the gold surface is seriously damaged due to the presence of CN(-) ions, which are released from the ferri/ferrocyanide redox probe. Even at optimized experimental conditions, etching the gold electrodes could not be completely suppressed and the repeatability of the EIS measurements was limited. In three out of four experimental runs, only two hybridization/dehybridization steps could be monitored reversibly by EIS. Thereafter etching the gold electrode significantly contributed to the EIS spectra whereas the QCM-D response was still repeatable. Hence great care has to be taken when this technique is used to monitor surface modification at gold electrodes.
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Affiliation(s)
- Stephan Vogt
- Nöll Junior Research Group, Organic Chemistry, Chemistry and Biology Department, Faculty IV, Siegen University , Adolf-Reichwein-Strasse 2, 57068 Siegen, Germany
| | - Qiang Su
- Nöll Junior Research Group, Organic Chemistry, Chemistry and Biology Department, Faculty IV, Siegen University , Adolf-Reichwein-Strasse 2, 57068 Siegen, Germany
| | - Cristina Gutiérrez-Sánchez
- Nöll Junior Research Group, Organic Chemistry, Chemistry and Biology Department, Faculty IV, Siegen University , Adolf-Reichwein-Strasse 2, 57068 Siegen, Germany
| | - Gilbert Nöll
- Nöll Junior Research Group, Organic Chemistry, Chemistry and Biology Department, Faculty IV, Siegen University , Adolf-Reichwein-Strasse 2, 57068 Siegen, Germany
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Henihan G, Schulze H, Corrigan DK, Giraud G, Terry JG, Hardie A, Campbell CJ, Walton AJ, Crain J, Pethig R, Templeton KE, Mount AR, Bachmann TT. Label- and amplification-free electrochemical detection of bacterial ribosomal RNA. Biosens Bioelectron 2016; 81:487-494. [PMID: 27016627 DOI: 10.1016/j.bios.2016.03.037] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 03/09/2016] [Accepted: 03/17/2016] [Indexed: 01/13/2023]
Abstract
Current approaches to molecular diagnostics rely heavily on PCR amplification and optical detection methods which have restrictions when applied to point of care (POC) applications. Herein we describe the development of a label-free and amplification-free method of pathogen detection applied to Escherichia coli which overcomes the bottleneck of complex sample preparation and has the potential to be implemented as a rapid, cost effective test suitable for point of care use. Ribosomal RNA is naturally amplified in bacterial cells, which makes it a promising target for sensitive detection without the necessity for prior in vitro amplification. Using fluorescent microarray methods with rRNA targets from a range of pathogens, an optimal probe was selected from a pool of probe candidates identified in silico. The specificity of probes was investigated on DNA microarray using fluorescently labeled 16S rRNA target. The probe yielding highest specificity performance was evaluated in terms of sensitivity and a LOD of 20 pM was achieved on fluorescent glass microarray. This probe was transferred to an EIS end point format and specificity which correlated to microarray data was demonstrated. Excellent sensitivity was facilitated by the use of uncharged PNA probes and large 16S rRNA target and investigations resulted in an LOD of 50 pM. An alternative kinetic EIS assay format was demonstrated with which rRNA could be detected in a species specific manner within 10-40min at room temperature without wash steps.
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Affiliation(s)
- Grace Henihan
- Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK
| | - Holger Schulze
- Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK
| | - Damion K Corrigan
- Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK; School of Chemistry, The University of Edinburgh, Joseph Black Building, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, Scotland, UK
| | - Gerard Giraud
- School of Physics and Astronomy, The University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JZ, Scotland, UK
| | - Jonathan G Terry
- Institute for Integrated Micro and Nano Systems, School of Engineering, The University of Edinburgh, Alexander Crum Brown Road, Edinburgh EH9 3FF, Scotland, UK
| | - Alison Hardie
- Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, Scotland, UK
| | - Colin J Campbell
- School of Chemistry, The University of Edinburgh, Joseph Black Building, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, Scotland, UK
| | - Anthony J Walton
- Institute for Integrated Micro and Nano Systems, School of Engineering, The University of Edinburgh, Alexander Crum Brown Road, Edinburgh EH9 3FF, Scotland, UK
| | - Jason Crain
- School of Physics and Astronomy, The University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JZ, Scotland, UK; National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK
| | - Ronald Pethig
- Institute for Integrated Micro and Nano Systems, School of Engineering, The University of Edinburgh, Alexander Crum Brown Road, Edinburgh EH9 3FF, Scotland, UK
| | - Kate E Templeton
- Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK; Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, Scotland, UK
| | - Andrew R Mount
- School of Chemistry, The University of Edinburgh, Joseph Black Building, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, Scotland, UK
| | - Till T Bachmann
- Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK.
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Mashhadizadeh MH, Talemi RP. Synergistic effect of magnetite and gold nanoparticles onto the response of a label-free impedimetric hepatitis B virus DNA biosensor. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 59:773-781. [PMID: 26652432 DOI: 10.1016/j.msec.2015.10.082] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2015] [Revised: 10/08/2015] [Accepted: 10/26/2015] [Indexed: 11/29/2022]
Abstract
A magnetite and gold nanoparticle modified carbon paste electrode (CPE) was prepared for the immobilization of a thiol modified Hepatitis B virus (HBV) probe DNA and determination trace amount of target HBV DNA. Indeed, the sensing platform integrated two nanoparticles that had previously been employed individually in the DNA biosensors. The proposed DNA biosensor could measure target HBV DNA virus concentration with a low detection limit of 3.1 (±0.1)×10-(13)M, which was greatly lower than the detection limit reported with gold or magnetite nanoparticles alone. The change of interfacial charge transfer resistance (RCT) was confirmed the hybrid formation between probe and target HBV DNA. The RCT difference (before and after hybridization with the target HBV DNA) was in a linear relationship with the logarithm of complementary oligonucleotide concentrations in the range of 8.3 (±0.1)×10(-13) to 6.4 (±0.2)×10(-7)M. In addition, the novel methodology for specific DNA sequence detection was highly selective, repeatable, and reproducible. Finally, this work was successfully utilized for the sensitive and label free impedimetric determination of HBV target DNA in the urine and blood plasma samples.
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De Rache A, Kejnovská I, Buess-Herman C, Doneux T. Electrochemical and circular dichroism spectroscopic evidence of two types of interaction between [Ru(NH3)6]3+ and an elongated thrombin binding aptamer G-quadruplex. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.05.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Singh S, Kaushal A, Khare S, Kumar P, Kumar A. Gold-mercaptopropionic acid-polyethylenimine composite based DNA sensor for early detection of rheumatic heart disease. Analyst 2015; 139:3600-6. [PMID: 24875529 DOI: 10.1039/c4an00324a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The first gold-mercaptopropionic acid-polyethylenimine composite based electrochemical DNA biosensor was fabricated for the early detection of Streptococcus pyogenes infection in humans causing rheumatic heart disease (heart valve damage). No biosensor is available for the detection of rheumatic heart disease (RHD). Therefore, the mga gene based sensor was developed by the covalent immobilization of a 5'-carboxyl modified single stranded DNA probe onto the gold composite electrode. The immobilized probe was hybridized with the genomic DNA (G-DNA) of S. pyogenes from throat swabs and the electrochemical response was measured by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and electrochemical impedance (EI). Covalent immobilization of the probe onto the gold composite and its hybridization with G-DNA was characterized by FTIR and SEM. The sensitivity of the sensor was 110.25 μA cm(-2) ng(-1) with DPV and the lower limit of detection was 10 pg per 6 μL. The sensor was validated with patient throat swab samples and results were compared with available methods. The sensor is highly specific to S. pyogenes and can prevent damage to heart valves by the early detection of the infection in only 30 min.
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Affiliation(s)
- Swati Singh
- CSIR-Institute of Genomics and Integrative Biology, Mall Road, Delhi-110007, India.
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36
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Bonk SM, Stubbe M, Buehler SM, Tautorat C, Baumann W, Klinkenberg ED, Gimsa J. Design and Characterization of a Sensorized Microfluidic Cell-Culture System with Electro-Thermal Micro-Pumps and Sensors for Cell Adhesion, Oxygen, and pH on a Glass Chip. BIOSENSORS-BASEL 2015; 5:513-36. [PMID: 26263849 PMCID: PMC4600170 DOI: 10.3390/bios5030513] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 07/15/2015] [Accepted: 07/23/2015] [Indexed: 01/09/2023]
Abstract
We combined a multi-sensor glass-chip with a microfluidic channel grid for the characterization of cellular behavior. The grid was imprinted in poly-dimethyl-siloxane. Mouse-embryonal/fetal calvaria fibroblasts (MC3T3-E1) were used as a model system. Thin-film platinum (Pt) sensors for respiration (amperometric oxygen electrode), acidification (potentiometric pH electrodes) and cell adhesion (interdigitated-electrodes structures, IDES) allowed us to monitor cell-physiological parameters as well as the cell-spreading behavior. Two on-chip electro-thermal micro-pumps (ETμPs) permitted the induction of medium flow in the system, e.g., for medium mixing and drug delivery. The glass-wafer technology ensured the microscopic observability of the on-chip cell culture. Connecting Pt structures were passivated by a 1.2 μm layer of silicon nitride (Si3N4). Thin Si3N4 layers (20 nm or 60 nm) were used as the sensitive material of the pH electrodes. These electrodes showed a linear behavior in the pH range from 4 to 9, with a sensitivity of up to 39 mV per pH step. The oxygen sensors were circular Pt electrodes with a sensor area of 78.5 μm(2). Their sensitivity was 100 pA per 1% oxygen increase in the range from 0% to 21% oxygen (air saturated). Two different IDES geometries with 30- and 50-μm finger spacings showed comparable sensitivities in detecting the proliferation rate of MC3T3 cells. These cells were cultured for 11 days in vitro to test the biocompatibility, microfluidics and electric sensors of our system under standard laboratory conditions.
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Affiliation(s)
- Sebastian M Bonk
- Chair for Biophysics, Department of Biology, University of Rostock, Gertrudenstr. 11a, 18057 Rostock, Germany.
| | - Marco Stubbe
- Chair for Biophysics, Department of Biology, University of Rostock, Gertrudenstr. 11a, 18057 Rostock, Germany.
| | - Sebastian M Buehler
- Leibniz Institute for Farm Animal Biology, Institute of Muscle Biology and Growth, Wilhelm-Stahl-Allee 2, 18196 Dummerstorf, Germany.
| | - Carsten Tautorat
- Chair for Biophysics, Department of Biology, University of Rostock, Gertrudenstr. 11a, 18057 Rostock, Germany.
| | - Werner Baumann
- Chair for Biophysics, Department of Biology, University of Rostock, Gertrudenstr. 11a, 18057 Rostock, Germany.
| | | | - Jan Gimsa
- Chair for Biophysics, Department of Biology, University of Rostock, Gertrudenstr. 11a, 18057 Rostock, Germany.
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Huang JMY, Henihan G, Macdonald D, Michalowski A, Templeton K, Gibb AP, Schulze H, Bachmann TT. Rapid Electrochemical Detection of New Delhi Metallo-beta-lactamase Genes To Enable Point-of-Care Testing of Carbapenem-Resistant Enterobacteriaceae. Anal Chem 2015; 87:7738-45. [PMID: 26121008 DOI: 10.1021/acs.analchem.5b01270] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The alarming rate at which antibiotic resistance is occurring in human pathogens causes a pressing need for improved diagnostic technologies aimed at rapid detection and point-of-care testing to support quick decision making regarding antibiotic therapy and patient management. Here, we report the successful development of an electrochemical biosensor to detect bla(NDM), the gene encoding the emerging New Delhi metallo-beta-lactamase, using label-free electrochemical impedance spectroscopy (EIS). The presence of this gene is of critical concern because organisms harboring bla(NDM) tend to be multiresistant, leaving very few treatment options. For the EIS assay, we used a bla(NDM)-specific PNA probe that was designed by applying a new approach that combines in silico probe design and fluorescence-based DNA microarray validation with electrochemical testing on gold screen-printed electrodes. The assay was successfully demonstrated for synthetic targets (LOD = 10 nM), PCR products (LOD = 100 pM), and direct, amplification-free detection from a bla(NDM)-harboring plasmid. The biosensor's specificity, preanalytical requirements, and performance under ambient conditions were demonstrated and successfully proved its suitability for further point-of-care test development.
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Affiliation(s)
- Jimmy Ming-Yuan Huang
- †Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, U.K.,§Emergency Department, Mackay Memorial Hospital, Taipei 10449, Taiwan
| | - Grace Henihan
- †Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, U.K
| | - Daniel Macdonald
- †Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, U.K
| | - Annette Michalowski
- †Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, U.K
| | - Kate Templeton
- ‡Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, Scotland, U.K
| | - Alan P Gibb
- ‡Department of Laboratory Medicine, Royal Infirmary of Edinburgh, Edinburgh EH16 4SA, Scotland, U.K
| | - Holger Schulze
- †Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, U.K
| | - Till T Bachmann
- †Division of Infection and Pathway Medicine, College of Medicine and Veterinary Medicine, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, U.K
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38
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Furst AL, Hill MG, Barton JK. A Multiplexed, Two-Electrode Platform for Biosensing Based on DNA-Mediated Charge Transport. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:6554-6562. [PMID: 26042916 PMCID: PMC4587567 DOI: 10.1021/acs.langmuir.5b00829] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We have developed a thin layer, multiplexed biosensing platform that features two working-electrode arrays for detecting small molecules, nucleic acid sequences, and DNA-binding proteins. DNA duplexes are patterned onto the primary electrode array, while a secondary electrode array is used both to initiate DNA monolayer formation and for electrochemical readout via DNA-mediated charge transport (DNA CT) chemistry. Electrochemical reduction of Cu(phendione)2(2+) (phendione is 1,10-phenanthroline-5,6-dione) at the secondary electrodes induces covalent attachment via click chemistry of ethynyl-labeled DNA probe duplexes onto the primary electrodes that have been treated with azide-terminated alkylthiols. Electrochemical impedance spectroscopy and cyclic voltammetry confirm that catalyst activation at the secondary electrode is essential to maintain the integrity of the DNA monolayer. Electrochemical readout of DNA CT processes that occur at the primary electrode is accomplished also at the secondary electrode. The two-electrode system enables the platform to function as a collector-generator using either ferrocyanide or ferricyanide as mediators with methylene blue and DNA charge transport. Electrochemical measurements at the secondary electrode eliminate the need for large background corrections. The resulting sensitivity of this platform enables the reliable and simultaneous detection of femtomoles of the transcription factors TATA-binding protein and CopG on a single multiplexed device.
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Affiliation(s)
- Ariel L. Furst
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125
| | - Michael G. Hill
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125
- Department of Chemistry and Chemical Biology, Occidental College, Los Angeles, CA 90041
| | - Jacqueline K. Barton
- Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, CA 91125
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García-González R, Costa-García A, Fernández-Abedul MT. Enzymatic amplification-free nucleic acid hybridisation sensing on nanostructured thick-film electrodes by using covalently attached methylene blue. Talanta 2015; 142:11-9. [PMID: 26003686 DOI: 10.1016/j.talanta.2015.03.028] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 03/11/2015] [Accepted: 03/15/2015] [Indexed: 01/12/2023]
Abstract
Amplification-free (referring to enzymatic amplification step) detection methodologies are increasing in biosensor development due to the need of faster and simpler protocols. However, for maintaining sensitivity without this step, highly detectable molecules or very sensitive detection techniques are required. The nanostructuration of transducer surfaces with carbon nanotubes (CNTs), gold nanoparticles (AuNPs) or both in nanohybrid configurations has been employed in this work for DNA hybridisation sensing purposes. Methylene blue (MB), covalently attached to single stranded DNA, (ssDNA) was incubated with a complementary sequence immobilized on nanostructured screen-printed electrodes (AuSPEs). Although CNTs can increase notoriously the signal of the marker, adsorptive properties should also be considered when bioassays are performed because non-specific adsorption (NSA) phenomena are magnified. In this work, strategies for decreasing NSA were thoroughly evaluated for the detection of Mycoplasma pneumoniae (MP) on CNTs-nanostructured screen-printed electrodes. Among them, the employ of UV-radiation or long incubation times (72h) allowed obtaining higher signals for the complementary strand with respect to the non-complementary one. The use of CNTs/AuNPs nanohybrids, together with the use of streptavidin-biotin (ST-B) interaction allows the higher differentiation (with a 3.5 ratio) in the genosensing of M. pneumoniae.
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Affiliation(s)
- Raquel García-González
- Departamento de Química Física y Analítica, Universidad de Oviedo, 33006 Oviedo, Asturias, Spain
| | - Agustín Costa-García
- Departamento de Química Física y Analítica, Universidad de Oviedo, 33006 Oviedo, Asturias, Spain
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Tymoczko J, Schuhmann W, Gebala M. Electrical potential-assisted DNA hybridization. How to mitigate electrostatics for surface DNA hybridization. ACS APPLIED MATERIALS & INTERFACES 2014; 6:21851-21858. [PMID: 25102381 DOI: 10.1021/am5027902] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Surface-confined DNA hybridization reactions are sensitive to the number and identity of DNA capture probes and experimental conditions such as the nature and the ionic strength of the electrolyte solution. When the surface probe density is high or the concentration of bulk ions is much lower than the concentration of ions within the DNA layer, hybridization is significantly slowed down or does not proceed at all. However, high-density DNA monolayers are attractive for designing high-sensitivity DNA sensors. Thus, circumventing sluggish DNA hybridization on such interfaces allows a high surface concentration of target DNA and improved signal/noise ratio. We present potential-assisted hybridization as a strategy in which an external voltage is applied to the ssDNA-modified interface during the hybridization process. Results show that a significant enhancement of hybridization can be achieved using this approach.
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Affiliation(s)
- Jakub Tymoczko
- Analytical Chemistry, Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum , Universitätsstrasse 150, 44780 Bochum, Germany
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41
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Liu J, Wagan S, Dávila Morris M, Taylor J, White RJ. Achieving reproducible performance of electrochemical, folding aptamer-based sensors on microelectrodes: challenges and prospects. Anal Chem 2014; 86:11417-24. [PMID: 25337781 PMCID: PMC4238692 DOI: 10.1021/ac503407e] [Citation(s) in RCA: 72] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
![]()
Combining specific recognition capabilities
with the excellent
spatiotemporal resolution of small electrodes represents a promising
methodology in bioanalytical and chemical sensing. In this paper,
we report the development of reproducible electrochemical, aptamer-based
(E-AB) sensors on a gold microelectrode platform. Specifically, we
develop microscale sensors (25 μm diameter) for two representative
small molecule targets–adenosine triphosphate and tobramycin.
Furthermore, we report on the challenges encountered at this size
scale including small-magnitude signals and interference from the
irreversible reduction of dissolved oxygen and present methods to
circumvent these challenges. Through the electrochemical deposition
of dendritic gold nanostructures, we demonstrate microscale sensors
with improved performance by increasing signal-to-noise and consequently
sensitivity. Finally, we report on the use of the nonspecific adsorption
of serum proteins as an additional layer of surface passivation for
stable sensor performance. The sensor development here represents
general guidelines for fabricating electrochemical, folding aptamer-based
sensors on small-scale electrodes.
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Affiliation(s)
- Juan Liu
- Department of Chemistry and Biochemistry, University of Maryland Baltimore County , 1000 Hilltop Circle, Baltimore, Maryland 21250, United States
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42
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Improving electrochemical biosensor performance by understanding the influence of target DNA length on assay sensitivity. J Electroanal Chem (Lausanne) 2014. [DOI: 10.1016/j.jelechem.2014.08.026] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Corrigan DK, Schulze H, Henihan G, Hardie A, Ciani I, Giraud G, Terry JG, Walton AJ, Pethig R, Ghazal P, Crain J, Campbell CJ, Templeton KE, Mount AR, Bachmann TT. Development of a PCR-free electrochemical point of care test for clinical detection of methicillin resistant Staphylococcus aureus (MRSA). Analyst 2014; 138:6997-7005. [PMID: 24093127 DOI: 10.1039/c3an01319g] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An MRSA assay requiring neither labeling nor amplification of target DNA has been developed. Sequence specific binding of fragments of bacterial genomic DNA is detected at femtomolar concentrations using electrochemical impedance spectroscopy (EIS). This has been achieved using systematic optimisation of probe chemistry (PNA self-assembled monolayer film on gold electrode), electrode film structure (the size and nature of the chemical spacer) and DNA fragmentation, as these are found to play an important role in assay performance. These sensitivity improvements allow the elimination of the PCR step and DNA labeling and facilitate the development of a simple and rapid point of care test for MRSA. Assay performance is then evaluated and specific direct detection of the MRSA diagnostic mecA gene from genomic DNA, extracted directly from bacteria without further treatment is demonstrated for bacteria spiked into saline (10(6) cells per mL) on gold macrodisc electrodes and into human wound fluid (10(4) cells per mL) on screen printed gold electrodes. The latter detection level is particularly relevant to clinical requirements and point of care testing where the general threshold for considering a wound to be infected is 10(5) cells per mL. By eliminating the PCR step typically employed in nucleic acid assays, using screen printed electrodes and achieving sequence specific discrimination under ambient conditions, the test is extremely simple to design and engineer. In combination with a time to result of a few minutes this means the assay is well placed for use in point of care testing.
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Affiliation(s)
- D K Corrigan
- Division of Pathway Medicine, Medical School, The University of Edinburgh, Chancellor's Building, 49 Little France Crescent, Edinburgh EH16 4SB, Scotland, UK.
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Riedel M, Kartchemnik J, Schöning MJ, Lisdat F. Impedimetric DNA Detection—Steps Forward to Sensorial Application. Anal Chem 2014; 86:7867-74. [DOI: 10.1021/ac501800q] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Marc Riedel
- Biosystems
Technology, Institute of Applied Life Sciences, Technical University of Applied Sciences Wildau, Hochschulring 1, 15745 Wildau, Germany
| | - Julia Kartchemnik
- Biosystems
Technology, Institute of Applied Life Sciences, Technical University of Applied Sciences Wildau, Hochschulring 1, 15745 Wildau, Germany
| | - Michael J. Schöning
- Institute
of Nano- and Biotechnologies, University of Applied Sciences Aachen, Heinrich-Mußmann-Strasse 1, 52428 Jülich, Germany
| | - Fred Lisdat
- Biosystems
Technology, Institute of Applied Life Sciences, Technical University of Applied Sciences Wildau, Hochschulring 1, 15745 Wildau, Germany
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45
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Wu CC, Ku BC, Ko CH, Chiu CC, Wang GJ, Yang YH, Wu SJ. Electrochemical impedance spectroscopy analysis of A-beta (1-42) peptide using a nanostructured biochip. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.04.132] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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46
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Tokel O, Inci F, Demirci U. Advances in plasmonic technologies for point of care applications. Chem Rev 2014; 114:5728-52. [PMID: 24745365 PMCID: PMC4086846 DOI: 10.1021/cr4000623] [Citation(s) in RCA: 215] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Indexed: 12/12/2022]
Affiliation(s)
- Onur Tokel
- Demirci
Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical
School, Cambridge, Massachusetts 02139, United States
| | - Fatih Inci
- Demirci
Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical
School, Cambridge, Massachusetts 02139, United States
- Demirci
Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Stanford University School of Medicine, Canary Center at Stanford
for Cancer Early Detection, Palo
Alto, California 94304, United States
| | - Utkan Demirci
- Demirci
Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical
School, Cambridge, Massachusetts 02139, United States
- Division of Infectious Diseases, Brigham
and Women’s Hospital, Harvard Medical
School, Boston, Massachusetts 02115, United States
- Harvard-MIT
Health Sciences and Technology, Cambridge, Massachusetts 02139, United States
- Demirci
Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Stanford University School of Medicine, Canary Center at Stanford
for Cancer Early Detection, Palo
Alto, California 94304, United States
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47
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García-González R, Costa-García A, Fernández-Abedul MT. Methylene blue covalently attached to single stranded DNA as electroactive label for potential bioassays. SENSORS AND ACTUATORS. B, CHEMICAL 2014; 191:784-790. [PMID: 32288245 PMCID: PMC7127606 DOI: 10.1016/j.snb.2013.10.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 09/24/2013] [Accepted: 10/07/2013] [Indexed: 05/12/2023]
Abstract
Methylene blue is an electroactive molecule that has been employed for the detection of the DNA hybridization event in electrochemical sensors. However, its use as a covalent label is very scarce and in most of the cases, non-covalent interactions (hydrophobic, electrostatic) are employed. Although it has advantages as simplicity and fewer number of procedure steps, the covalent attachment is less exploited in the development of these sensors. In this article, the electrochemical behavior of methylene blue attached to different DNA-strands is studied. Several lengths (15- and 30-mer) and different degree of DNA modification (MB-DNA, MB-DNA-MB and MB-DNA-SH) have been studied. The highest signals were obtained for longer strands with two MB molecules. In all the cases the signal is enhanced by CNT-nanostructuration of the electrode. Adsorption on these modified screen-printed electrodes allowed the amplification by employing an accumulation time. In this way, a sensitivity of -0.2864 μA μM-1 and a limit of detection of 800 nM for a 120 s accumulation time were obtained.
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48
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Ebrahimi A, Dak P, Salm E, Dash S, Garimella SV, Bashir R, Alam MA. Nanotextured superhydrophobic electrodes enable detection of attomolar-scale DNA concentration within a droplet by non-faradaic impedance spectroscopy. LAB ON A CHIP 2013; 13:4248-4256. [PMID: 24056864 PMCID: PMC3886286 DOI: 10.1039/c3lc50517k] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Label-free, rapid detection of biomolecules in microliter volumes of highly diluted solutions (sub-femtomolar) is of essential importance for numerous applications in medical diagnostics, food safety, and chem-bio sensing for homeland security. At ultra-low concentrations, regardless of the sensitivity of the detection approach, the sensor response time is limited by physical diffusion of molecules towards the sensor surface. We have developed a fast, low cost, non-faradaic impedance sensing method for detection of synthetic DNA molecules in DI water at attomolar levels by beating the diffusion limit through evaporation of a micro-liter droplet of DNA on a nanotextured superhydrophobic electrode array. Continuous monitoring of the impedance of individual droplets as a function of evaporation time is exploited to dramatically improve the sensitivity and robustness of detection. Formation of the nanostructures on the electrode surface not only increases the surface hydrophobicity, but also allows robust pinning of the droplet contact area to the sensor surface. These two features are critical for performing highly stable impedance measurements as the droplet evaporates. Using this scheme, the detection limit of conventional non-faradaic methods is improved by five orders of magnitude. The proposed platform represents a step-forward towards realization of ultra-sensitive lab-on-chip biomolecule detectors for real time point-of-care application. Further works are however needed to ultimately realize the full potential of the proposed approach to appraise biological samples in complex buffer solutions rather than in DI water.
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Affiliation(s)
- Aida Ebrahimi
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, IN 47907, USA.
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49
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Ding Y, Wang Q, Gao F, Gao F. Highly sensitive and selective DNA biosensor using a dumbbell-shaped bis-groove binder of bi-acetylferrocene ethylenediamine complex as electrochemical indicator. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.05.066] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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50
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Esteban Fernández de Ávila B, Watkins HM, Pingarrón JM, Plaxco KW, Palleschi G, Ricci F. Determinants of the detection limit and specificity of surface-based biosensors. Anal Chem 2013; 85:6593-7. [PMID: 23713910 DOI: 10.1021/ac4012123] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Here, we employ a model electrochemical DNA sensor to demonstrate that the detection limit and specificity of surface-based sensors often are not dependent on the true affinity of the probe for its target but are simply dependent on the effective probe concentration. Under these circumstances, the observed affinity (and thus the sensor's detection limit and specificity) will depend on the density with which the probes are packed on the surface of the sensor, the surface area, and even the volume of sample employed.
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