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Peala W, Kitchanakan P, Khongchareonporn N, Angsujinda K, Sittidech A, Wanganurakkul S, Chintapitaksakul L, Suea-Ngam A, Wang SF, Kunpatee K, Chaiyo S, Assavalapsakul W. Paper-based electrochemical immunosensor for highly sensitive detection of chicken anemia virus. Talanta 2024; 272:125820. [PMID: 38430864 DOI: 10.1016/j.talanta.2024.125820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/01/2024] [Accepted: 02/21/2024] [Indexed: 03/05/2024]
Abstract
Chicken anemia virus (CAV) is one of the primary causes of morbidity and mortality in young chickens. Given the importance of timely detection for maintaining livestock quality, there is a pressing need for rapid and field-deployable diagnostic tools. This study introduces a highly sensitive paper-based electrochemical immunosensor (PEI) for the detection of the 60 amino acid N-terminally truncated viral protein 1 (Δ60VP1), a derivative of the CAV capsid (VP1). A custom antibody was produced for precise immunoassay detection, with results obtainable within 30 min using Square Wave Voltammetry (SWV). The underlying mechanism involves an immunocomplex in the sample zone that hinders the electron transfer of redox species, thereby reducing the current signal in proportion to the Δ60VP1 concentration. Under optimal conditions, the detection linearity for Δ60VP1 ranged from 80 to 2500 ng/mL, with a limit of detection (LoD) of 25 ng/mL. This device was then successfully applied to detect VP1 in 29 chicken serum samples, achieving 91.6% sensitivity and 94.1% selectivity. In conclusion, the PEI device presents a promising solution for rapid, sensitive, and disposable detection of chicken pathogens, potentially revolutionizing productivity and quality assurance in chicken farming.
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Affiliation(s)
- Wisuttiya Peala
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Phatpimol Kitchanakan
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Nanthika Khongchareonporn
- The Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; Center of Excellence for Food and Water Risk Analysis, Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Kitipong Angsujinda
- Aquatic Resources Research Institute, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Akekarach Sittidech
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Saruda Wanganurakkul
- Veterinary Research and Development Center, Eastern Region, Department of Livestock Development, Chonburi, 20220, Thailand
| | | | - Akkapol Suea-Ngam
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London, SW7 2AZ, UK
| | - Sheng-Fan Wang
- Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung, 80708, Taiwan
| | - Kanjana Kunpatee
- The Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Sudkate Chaiyo
- The Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Bangkok, 10330, Thailand; Center of Excellence for Food and Water Risk Analysis, Department of Veterinary Public Health, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, 10330, Thailand.
| | - Wanchai Assavalapsakul
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand.
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Çağlayan Arslan Z, Okan M, Külah H. Pre-enrichment-free detection of hepatocellular carcinoma-specific ctDNA via PDMS and MEMS-based microfluidic sensor. Mikrochim Acta 2024; 191:229. [PMID: 38565645 PMCID: PMC10987365 DOI: 10.1007/s00604-024-06315-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Accepted: 03/15/2024] [Indexed: 04/04/2024]
Abstract
The growing interest in microfluidic biosensors has led to improvements in the analytical performance of various sensing mechanisms. Although various sensors can be integrated with microfluidics, electrochemical ones have been most commonly employed due to their ease of miniaturization, integration ability, and low cost, making them an established point-of-care diagnostic method. This concept can be easily adapted to the detection of biomarkers specific to certain cancer types. Pathological profiling of hepatocellular carcinoma (HCC) is heterogeneous and rather complex, and biopsy samples contain limited information regarding the tumor and do not reflect its heterogeneity. Circulating tumor DNAs (ctDNAs), which can contain information regarding cancer characteristics, have been studied tremendously since liquid biopsy emerged as a new diagnostic method. Recent improvements in the accuracy and sensitivity of ctDNA determination also paved the way for genotyping of somatic genomic alterations. In this study, three-electrode (Au-Pt-Ag) glass chips were fabricated and combined with polydimethylsiloxane (PDMS) microchannels to establish an electrochemical microfluidic sensor for detecting c.747G > T hotspot mutations in the TP53 gene of ctDNAs from HCC. The preparation and analysis times of the constructed sensor were as short as 2 h in total, and a relatively high flow rate of 30 µl/min was used during immobilization and hybridization steps. To the best of our knowledge, this is the first time a PDMS-based microfluidic electrochemical sensor has been developed to target HCC ctDNAs. The system exhibited a limit of detection (LOD) of 24.1 fM within the tested range of 2-200 fM. The sensor demonstrated high specificity in tests conducted with fully noncomplementary and one-base mismatched target sequences. The developed platform is promising for detecting HCC-specific ctDNA at very low concentrations without requiring pre-enrichment steps.
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Affiliation(s)
- Zeynep Çağlayan Arslan
- Department of Electrical and Electronics Engineering, METU, Ankara, Turkey
- METU MEMS Research and Application Center, Ankara, Turkey
| | - Meltem Okan
- Department of Micro and Nanotechnology, METU, Ankara, Turkey
- METU MEMS Research and Application Center, Ankara, Turkey
| | - Haluk Külah
- Department of Electrical and Electronics Engineering, METU, Ankara, Turkey.
- Department of Micro and Nanotechnology, METU, Ankara, Turkey.
- METU MEMS Research and Application Center, Ankara, Turkey.
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3
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Lokar N, Pečar B, Možek M, Vrtačnik D. Microfluidic Electrochemical Glucose Biosensor with In Situ Enzyme Immobilization. BIOSENSORS 2023; 13:364. [PMID: 36979576 PMCID: PMC10046266 DOI: 10.3390/bios13030364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/03/2023] [Accepted: 03/08/2023] [Indexed: 06/18/2023]
Abstract
The development and characterization of a microfluidic electrochemical glucose biosensor are presented herein. The transducer part is based on thin-film metal electrodes on a glass substrate. The biological recognition element of the biosensor is the pyrroloquinoline quinone-glucose dehydrogenase (PQQ-GdhB) enzyme, selectively in situ immobilized via microcontact printing of a mixed self-assembling monolayer (SAM) on a gold working electrode, while the microfluidic part of the device comprises microchannel and microfluidic connections formed in a polydimethylsiloxane (PDMS) elastomer. The electrode properties throughout all steps of biosensor construction and the biosensor response to glucose concentration and analyte flow rate were characterized by cyclic voltammetry and chronoamperometry. A measurement range of up to 10 mM in glucose concentration with a linear range up to 200 μM was determined. A detection limit of 30 µM in glucose concentration was obtained. Respective biosensor sensitivities of 0.79 nA/µM/mm2 and 0.61 nA/µM/mm2 were estimated with and without a flow at 20 µL/min. The developed approach of in situ enzyme immobilization can find a wide number of applications in the development of microfluidic biosensors, offering a path towards continuous and time-independent detection.
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Super-sensitive bifunctional nanoprobe: Self-assembly of peptide-driven nanoparticles demonstrating tumor fluorescence imaging and therapy. Acta Pharm Sin B 2022; 12:1473-1486. [PMID: 35530136 PMCID: PMC9069314 DOI: 10.1016/j.apsb.2021.07.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/22/2021] [Accepted: 06/23/2021] [Indexed: 11/20/2022] Open
Abstract
The development of nanomedicine has recently achieved several breakthroughs in the field of cancer treatment; however, biocompatibility and targeted penetration of these nanomaterials remain as limitations, which lead to serious side effects and significantly narrow the scope of their application. The self-assembly of intermediate filaments with arginine-glycine-aspartate (RGD) peptide (RGD-IFP) was triggered by the hydrophobic cationic molecule 7-amino actinomycin D (7-AAD) to synthesize a bifunctional nanoparticle that could serve as a fluorescent imaging probe to visualize tumor treatment. The designed RGD-IFP peptide possessed the ability to encapsulate 7-AAD molecules through the formation of hydrogen bonds and hydrophobic interactions by a one-step method. This fluorescent nanoprobe with RGD peptide could be targeted for delivery into tumor cells and released in acidic environments such as endosomes/lysosomes, ultimately inducing cytotoxicity by arresting tumor cell cycling with inserted DNA. It is noteworthy that the RGD-IFP/7-AAD nanoprobe tail-vein injection approach demonstrated not only high tumor-targeted imaging potential, but also potent antitumor therapeutic effects in vivo. The proposed strategy may be used in peptide-driven bifunctional nanoparticles for precise imaging and cancer therapy.
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Tiwari A, Chaskar J, Ali A, Arivarasan VK, Chaskar AC. Role of Sensor Technology in Detection of the Breast Cancer. BIONANOSCIENCE 2022. [DOI: 10.1007/s12668-021-00921-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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6
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Zhou L, Li X, Zhu B, Su B. An Overview of Antifouling Strategies for Electrochemical Analysis. ELECTROANAL 2021. [DOI: 10.1002/elan.202100406] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Lin Zhou
- Institute of Analytical Chemistry, Department of Chemistry Zhejiang University 310058 Hangzhou China
| | - Xinru Li
- Institute of Analytical Chemistry, Department of Chemistry Zhejiang University 310058 Hangzhou China
| | - Boyu Zhu
- Institute of Analytical Chemistry, Department of Chemistry Zhejiang University 310058 Hangzhou China
| | - Bin Su
- Institute of Analytical Chemistry, Department of Chemistry Zhejiang University 310058 Hangzhou China
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Salva ML, Rocca M, Niemeyer CM, Delamarche E. Methods for immobilizing receptors in microfluidic devices: A review. MICRO AND NANO ENGINEERING 2021. [DOI: 10.1016/j.mne.2021.100085] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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8
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Fan J, Tang Y, Yang W, Yu Y. Disposable multiplexed electrochemical sensors based on electro-triggered selective immobilization of probes for simultaneous detection of DNA and proteins. J Mater Chem B 2021; 8:7501-7510. [PMID: 32672323 DOI: 10.1039/d0tb01532f] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Electrically addressable covalent immobilization of probes on a multiplexed electrode for the simultaneous detection of multiple targets within the same sample is often regarded as a difficult milestone to be achieved. Herein, we demonstrated a reagentless disposable multiplexed electrochemical DNA and aptamer-based sensing platform for the simultaneous determination of various targets. The electrochemically triggered "click" chemistry was developed, and three biomarkers, including p53, thrombin, and VEGF165 were used as model analytes. The proposed sensor consisted of three independent screen-printed carbon electrodes (SPCE), with an alkyne-azide cycloaddition reaction that was activated selectively by means of electrical triggering, so that different DNA probes can be modified on the desired electrode units in sequence. In terms of simultaneous detection, the sensor was able to quantify the DNA target of p53 with a detection limit of 0.35 nM, whereas the limits of detection for protein quantification of thrombin and VEGF165 were 0.22 nM and 0.014 nM, respectively. The proposed sensor not only showed encouraging reproducibility and stability, but also performed well even in 50% serum samples. Therefore, the work described here offers a general strategy for developing a multiplexed sensor with promising potential to achieve rapid, simple and cost-effective analysis of biological samples.
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Affiliation(s)
- Jinlong Fan
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150001, P. R. China.
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Horny MC, Dupuis V, Siaugue JM, Gamby J. Release and Detection of microRNA by Combining Magnetic Hyperthermia and Electrochemistry Modules on a Microfluidic Chip. SENSORS 2020; 21:s21010185. [PMID: 33383936 PMCID: PMC7796339 DOI: 10.3390/s21010185] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/06/2020] [Revised: 12/23/2020] [Accepted: 12/25/2020] [Indexed: 01/15/2023]
Abstract
The heating of a biologic solution is a crucial part in an amplification process such as the catalytic detection of a biological target. However, in many situations, heating must be limited in microfluidic devices, as high temperatures can cause the denaturation of the chip components. Local heating through magnetic hyperthermia on magnetic nano-objects has opened the doors to numerous improvements, such as for oncology where a reduced heating allows the synergy of chemotherapy and thermotherapy. Here we report on the design and implementation of a lab on chip without global heating of samples. It takes advantage of the extreme efficiency of DNA-modified superparamagnetic core-shell nanoparticles to capture complementary sequences (microRNA-target), uses magnetic hyperthermia to locally release these targets, and detects them through electrochemical techniques using ultra-sensitive channel DNA-modified ultramicroelectrodes. The combination of magnetic hyperthermia and microfluidics coupled with on-chip electrochemistry opens the way to a drastic reduction in the time devoted to the steps of extraction, amplification and nucleic acids detection. The originality comes from the design and microfabrication of the microfluidic chip suitable to its insertion in the millimetric gap of toric inductance with a ferrite core.
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Affiliation(s)
- Marie-Charlotte Horny
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France;
- Sorbonne Université, CNRS, Physico-Chimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, F-75005 Paris, France; (V.D.); (J.-M.S.)
- Sorbonne Université, CNRS, Laboratoire Interfaces et Systèmes Electrochimiques, LISE, F-75005 Paris, France
| | - Vincent Dupuis
- Sorbonne Université, CNRS, Physico-Chimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, F-75005 Paris, France; (V.D.); (J.-M.S.)
| | - Jean-Michel Siaugue
- Sorbonne Université, CNRS, Physico-Chimie des Électrolytes et Nanosystèmes Interfaciaux, PHENIX, F-75005 Paris, France; (V.D.); (J.-M.S.)
| | - Jean Gamby
- Université Paris-Saclay, CNRS, Centre de Nanosciences et de Nanotechnologies, 91120 Palaiseau, France;
- Correspondence: ; Tel.: +33-1-70-27-06-70
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10
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Chircov C, Bîrcă AC, Grumezescu AM, Andronescu E. Biosensors-on-Chip: An Up-to-Date Review. Molecules 2020; 25:E6013. [PMID: 33353220 PMCID: PMC7765790 DOI: 10.3390/molecules25246013] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 12/15/2020] [Accepted: 12/16/2020] [Indexed: 12/13/2022] Open
Abstract
Generally, biosensors are designed to translate physical, chemical, or biological events into measurable signals, thus offering qualitative and/or quantitative information regarding the target analytes. While the biosensor field has received considerable scientific interest, integrating this technology with microfluidics could further bring significant improvements in terms of sensitivity and specificity, resolution, automation, throughput, reproducibility, reliability, and accuracy. In this manner, biosensors-on-chip (BoC) could represent the bridging gap between diagnostics in central laboratories and diagnostics at the patient bedside, bringing substantial advancements in point-of-care (PoC) diagnostic applications. In this context, the aim of this manuscript is to provide an up-to-date overview of BoC system development and their most recent application towards the diagnosis of cancer, infectious diseases, and neurodegenerative disorders.
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Affiliation(s)
- Cristina Chircov
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (C.C.); (A.C.B.); (E.A.)
| | - Alexandra Cătălina Bîrcă
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (C.C.); (A.C.B.); (E.A.)
| | - Alexandru Mihai Grumezescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (C.C.); (A.C.B.); (E.A.)
- Research Institute of the University of Bucharest—ICUB, University of Bucharest, 050657 Bucharest, Romania
| | - Ecaterina Andronescu
- Department of Science and Engineering of Oxide Materials and Nanomaterials, University Politehnica of Bucharest, 011061 Bucharest, Romania; (C.C.); (A.C.B.); (E.A.)
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11
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Veselinovic J, AlMashtoub S, Nagella S, Seker E. Interplay of Effective Surface Area, Mass Transport, and Electrochemical Features in Nanoporous Nucleic Acid Sensors. Anal Chem 2020; 92:10751-10758. [PMID: 32600033 DOI: 10.1021/acs.analchem.0c02104] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Electrochemical biosensors transduce biochemical events (e.g., DNA hybridization) to electrical signals and can be readily interfaced with electronic instrumentation for portability. Nanostructuring the working electrode enhances sensor performance via augmented effective surface area that increases the capture probability of an analyte. However, increasing the effective surface area via thicker nanostructured electrodes hinders the analyte's permeation into the nanostructured volume and limits its access to deeper electrode surfaces. Here, we use nanoporous gold (np-Au) with various thicknesses and pore morphologies coupled with a methylene blue (MB) reporter-tagged DNA probe for DNA target detection as a model system to study the influence of electrode features on electrochemical sensing performance. Independent of the DNA target concentration, the hybridization current (surrogate for detection sensitivity) increases with the surface enhancement factor (EF), until an EF of ∼5, after which the sensor performance deteriorates. Electrochemical and fluorometric quantification of a desorbed DNA probe suggest that DNA permeation is severely limited for higher EFs. In addition, undesirable capacitive currents disguise the faradaic currents from the MB reporter at larger EFs that require higher square wave voltammetry (SWV) frequencies. Finally, a real-time hybridization study reveals that expanding the effective surface area beyond EFs of ∼5 decreases sensor performance.
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Affiliation(s)
- Jovana Veselinovic
- Department of Chemical Engineering, University of California-Davis, Davis, California 95616, United States
| | - Suzan AlMashtoub
- Department of Chemical Engineering, University of California-Davis, Davis, California 95616, United States
| | - Sachit Nagella
- Department of Chemical Engineering, University of California-Davis, Davis, California 95616, United States
| | - Erkin Seker
- Department of Electrical and Computer Engineering, University of California-Davis, Davis, California 95616, United States
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Fava EL, Martimiano do Prado T, Almeida Silva T, Cruz de Moraes F, Censi Faria R, Fatibello‐Filho O. New Disposable Electrochemical Paper‐based Microfluidic Device with Multiplexed Electrodes for Biomarkers Determination in Urine Sample. ELECTROANAL 2020. [DOI: 10.1002/elan.201900641] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Elson Luiz Fava
- Department of Chemistry Federal University of São Carlos São Carlos, P.O. Box 676 13560-970, SP Brazil
| | | | - Tiago Almeida Silva
- Department of Chemistry Federal University of São Carlos São Carlos, P.O. Box 676 13560-970, SP Brazil
- Department of Metallurgy and Chemistry Federal Center for Technological Education of Minas Gerais Timóteo 35180-008, MG Brazil
| | - Fernando Cruz de Moraes
- Department of Chemistry Federal University of São Carlos São Carlos, P.O. Box 676 13560-970, SP Brazil
| | - Ronaldo Censi Faria
- Department of Chemistry Federal University of São Carlos São Carlos, P.O. Box 676 13560-970, SP Brazil
| | - Orlando Fatibello‐Filho
- Department of Chemistry Federal University of São Carlos São Carlos, P.O. Box 676 13560-970, SP Brazil
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13
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Nanomaterials as efficient platforms for sensing DNA. Biomaterials 2019; 214:119215. [DOI: 10.1016/j.biomaterials.2019.05.026] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 05/13/2019] [Accepted: 05/16/2019] [Indexed: 02/07/2023]
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Veselinovic J, Almashtoub S, Seker E. Anomalous Trends in Nucleic Acid-Based Electrochemical Biosensors with Nanoporous Gold Electrodes. Anal Chem 2019; 91:11923-11931. [PMID: 31429540 DOI: 10.1021/acs.analchem.9b02686] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Molecular diagnostics have significantly advanced the early detection of diseases, where electrochemical sensing of biomarkers has shown considerable promise. For a nucleic acid-based electrochemical sensor with signal-off behavior, the performance is evaluated by percent signal suppression (% ss), which indicates the change in current after hybridization. The % ss is generally due to more redox molecules (e.g., methylene blue) associating with the probe DNA bases in the single-strand form than the double-strand form upon hybridization with the target nucleic acid. Nanostructured electrodes generally enhance electrochemical sensor performance via several mechanisms, including increased number of capture probes per electrode volume and unique nanoscale transport phenomena. Here, we employ nanoporous gold (np-Au) as a model electrode material to study the influence of probe immobilization solution concentration on sensor performance and the underlying mechanisms. Unlike planar gold (pl-Au) electrodes, where % ss reaches a steady state with increasing concentration of the grafting solution, the % ss displays peak performance at certain grafting solution concentrations followed by rapid deterioration and reversal of the % ss polarity, suggesting an unexpected case of increased charge transfer upon hybridization. Fluorometric assessments of electrochemically desorbed nucleic acids for different electrode morphologies reveal that a significant amount of DNA molecules (unhybridized and hybridized) remain within the nanopores posthybridization. Analysis of electrochemical signals (e.g., square wave voltammogram shape) suggests that the large unbound nucleic acid concentration may be altering the modes of methylene blue interaction with the nucleic acids and charge transfer to the electrode surfaces.
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Affiliation(s)
- Jovana Veselinovic
- Department of Chemical Engineering , University of California, Davis , Davis , California 95616 , United States
| | - Suzan Almashtoub
- Department of Chemical Engineering , University of California, Davis , Davis , California 95616 , United States
| | - Erkin Seker
- Department of Electrical and Computer Engineering , University of California, Davis , Davis , California 95616 , United States
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15
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Veselinovic J, Alangari M, Li Y, Matharu Z, Artés JM, Seker E, Hihath J. Two-tiered electrical detection, purification, and identification of nucleic acids in complex media. Electrochim Acta 2019. [DOI: 10.1016/j.electacta.2019.05.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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16
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Stine KJ. Nanoporous Gold and Other Related Materials. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1080. [PMID: 31357629 PMCID: PMC6723733 DOI: 10.3390/nano9081080] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Accepted: 07/24/2019] [Indexed: 12/22/2022]
Abstract
The field of nanomaterials continues to expand with the discovery of new nanostructures opening up new possibilities for both the study of unique physical properties and new applications [...].
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Affiliation(s)
- Keith J Stine
- Department of Chemistry and Biochemistry, University of Missouri, Saint Louis, MO 63121, USA.
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Rafique S, Khan S, Bashir S, Nasir R. Facile development of highly sensitive femtomolar electrochemical DNA biosensor using gold nanoneedle-modified electrode. CHEMICAL PAPERS 2019. [DOI: 10.1007/s11696-019-00874-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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18
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Cancer diagnosis using nanomaterials based electrochemical nanobiosensors. Biosens Bioelectron 2019; 126:773-784. [DOI: 10.1016/j.bios.2018.11.026] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Revised: 11/15/2018] [Accepted: 11/16/2018] [Indexed: 12/11/2022]
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19
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Zhou L, Hou H, Wei H, Yao L, Sun L, Yu P, Su B, Mao L. In Vivo Monitoring of Oxygen in Rat Brain by Carbon Fiber Microelectrode Modified with Antifouling Nanoporous Membrane. Anal Chem 2019; 91:3645-3651. [DOI: 10.1021/acs.analchem.8b05658] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lin Zhou
- Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Hanfeng Hou
- Beijing National Research Center for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Huan Wei
- Beijing National Research Center for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Lina Yao
- Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Lei Sun
- Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Ping Yu
- Beijing National Research Center for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Bin Su
- Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Lanqun Mao
- Beijing National Research Center for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
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