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Özyurt C, Uludağ İ, Sezgintürk MK. An ultrasensitive and disposable electrochemical aptasensor for prostate-specific antigen (PSA) detection in real serum samples. Anal Bioanal Chem 2023; 415:1123-1136. [PMID: 36155829 DOI: 10.1007/s00216-022-04309-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/22/2022] [Accepted: 08/29/2022] [Indexed: 02/07/2023]
Abstract
In this study, we constructed a disposable indium tin oxide polyethylene terephthalate film (ITO-PET)-based electrochemical aptasensor for analyzing prostate-specific antigen (PSA), one of the most important biomarkers of prostate cancer. Because of their clinical importance, building PSA biosensing systems with high sensitivity and stability is essential. However, it still presents significant difficulties, such as low detection limits. We designed a platform to covalently bind the amino-terminated aptamer by modifying the ITO-PET surface with carboxyethylsilanetriol (CTES) to obtain a self-assembled monolayer (SAM). We also evaluated the potential for use in real human serum samples by investigating the optimal operating conditions and analytical performance characteristics of the developed biosensor. The design we present here exhibits excellent precision, with a limit of detection (LOD) as low as 8.74 fg/mL PSA. The broad linear detection range of the biosensor under optimal conditions was determined as 1.0-1500 fg/mL. The dissociation constant (Kd) for the aptamer was also calculated as 46.28 ± 5.63 nM by evaluating the impedimetric response as a function of PSA concentration. The aptasensor displayed considerable repeatability (1.3% RSD) and reproducibility (7.51% RSD) and good storage stability (98.34% of the initial activity for 8 weeks). Additionally, we demonstrated that the technique we developed was quite efficient in estimating the kinetics of aptamer-analyte interactions by determining the Kd and single-frequency impedance (SFI) data. In conclusion, we proposed a selective and sensitive biosensor with the potential for clinical application and superior performance in real serum samples.
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Affiliation(s)
- Canan Özyurt
- Department of Chemistry and Chemical Processing Technologies, Lapseki Vocational School, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - İnci Uludağ
- Bioengineering Department, Engineering Faculty, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - Mustafa Kemal Sezgintürk
- Bioengineering Department, Engineering Faculty, Çanakkale Onsekiz Mart University, Çanakkale, Turkey.
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2
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Štukovnik Z, Bren U. Recent Developments in Electrochemical-Impedimetric Biosensors for Virus Detection. Int J Mol Sci 2022; 23:ijms232415922. [PMID: 36555560 PMCID: PMC9788240 DOI: 10.3390/ijms232415922] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 12/07/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Viruses, including influenza viruses, MERS-CoV (Middle East respiratory syndrome coronavirus), SARS-CoV (severe acute respiratory syndrome coronavirus), HAV (Hepatitis A virus), HBV (Hepatitis B virus), HCV (Hepatitis C virus), HIV (human immunodeficiency virus), EBOV (Ebola virus), ZIKV (Zika virus), and most recently SARS-CoV-2 (severe acute respiratory syndrome coronavirus 2), are responsible for many diseases that result in hundreds of thousands of deaths yearly. The ongoing outbreak of the COVID-19 disease has raised a global concern and intensified research on the detection of viruses and virus-related diseases. Novel methods for the sensitive, rapid, and on-site detection of pathogens, such as the recent SARS-CoV-2, are critical for diagnosing and treating infectious diseases before they spread and affect human health worldwide. In this sense, electrochemical impedimetric biosensors could be applied for virus detection on a large scale. This review focuses on the recent developments in electrochemical-impedimetric biosensors for the detection of viruses.
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Affiliation(s)
- Zala Štukovnik
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
| | - Urban Bren
- Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
- Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Glagoljaška ulica 8, 6000 Koper, Slovenia
- Institute for Environmental Protection and Sensors, Beloruska ulica 7, 2000 Maribor, Slovenia
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3
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Uludağ İ, Sezgintürk MK. Ultrasensitive and Cost-Effective Detection of Neuropeptide-Y by a Disposable Immunosensor: A New Functionalization Route for Indium-Tin Oxide Surface. BIOSENSORS 2022; 12:925. [PMID: 36354435 PMCID: PMC9688368 DOI: 10.3390/bios12110925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 10/22/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
Neuropeptide Y (NPY) is one of the most abundant neuropeptides in the human brain, and its levels in the blood change in neurodegenerative and neuroimmune disorders. This indicates that NPY may serve as a diagnostic and monitoring marker for associated disorders. In this paper, an electrochemical immunosensor was created to detect NPY biomarkers using a novel immobilization technique. The proposed biosensor system enables accurate, specific, cost-effective, and practical biomarker analysis. Indium tin oxide-coated polyethylene terephthalate (ITO-PET) sheets were treated with hexamethylene diisocyanate (HMDC) to covalently immobilize antibodies. Electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques were used to analyze each step of the biosensors. The proposed NPY biosensor has a broad linear detection range (0.01-100 pg mL-1), a low limit of detection (LOD) (0.02968 pg mL-1), and a low limit of quantification (LOQ) (0.0989 pg mL-1). Atomic force microscopy (AFM) was used to support in the optimization process, study the surface morphology, and visualize it. Studies of repeatability, reproducibility, storage, and Kramers-Kronig transformation were conducted during electrochemical characterization. After analytical experiments, the biosensor's responses to human serum samples were evaluated. According to the obtained data, the error margin is small, and the created biosensor offers a great deal of promise for the clinical measurement of NPY.
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Affiliation(s)
| | - Mustafa Kemal Sezgintürk
- Bioengineering Department, Faculty of Engineering, Çanakkale Onsekiz Mart University, Çanakkale 17100, Turkey
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4
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Uludağ İ, Sezgintürk MK. A direct and simple immobilization route for immunosensors by CNBr activation for covalent attachment of anti-leptin: obesity diagnosis point of view. 3 Biotech 2022; 12:33. [PMID: 35070623 PMCID: PMC8724356 DOI: 10.1007/s13205-021-03096-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 12/16/2021] [Indexed: 01/03/2023] Open
Abstract
Leptin is a peptide hormone produced in adipose tissue that works as an antiobesity hormone by balancing energy intake and expenditure. We aimed to develop an ultrasensitive electrochemical immunosensor based on a novel immobilization technique for the early detection of leptin-related diseases in this work. Although several methods for immobilizing antibodies to the biosensor recognition element are known, it is necessary to utilize novel, cost-effective, and less complicated immobilization procedures. When compared with currently utilized immobilization techniques for leptin measurement, this novel method is more efficient, easy to prepare, and sensitive, with a broad detection range. Indium tin oxide-coated polyethylene terephthalate (ITO-PET) sheets were used as the working electrode. ITO-PET sheets were modified using cyanogen bromide (CNBr) to immobilize the anti-leptin antibody through covalent interactions. Each stage of the proposed biosensors was characterized by electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) methods, and extensive characterization studies were carried out. The designed biosensor has a wide linear detection range (0.05-100 pg/mL), low limits of detection (LOD) (0.0086 pg/mL) and quantification (LOQ) (0.0287 pg/mL). It was concluded that although it is disposable, the ITO-PET working electrode retains its activity even in repeated studies. In addition, the new immobilization procedure provided by CNBr for the designed biosensor fabrication can be effectively used in other biosensing applications. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-021-03096-w.
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Affiliation(s)
- İnci Uludağ
- Faculty of Engineering, Bioengineering Department, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
| | - Mustafa Kemal Sezgintürk
- Faculty of Engineering, Bioengineering Department, Çanakkale Onsekiz Mart University, Çanakkale, Turkey
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5
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Malla P, Chen GC, Liao HP, Liu CH, Wu WC. Label-free parathyroid hormone immunosensor using nanocomposite modified carbon electrode. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114917] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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6
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Demirbakan B, Kemal Sezgintürk M. A novel ultrasensitive immunosensor based on disposable graphite paper electrodes for troponin T detection in cardiovascular disease. Talanta 2020; 213:120779. [DOI: 10.1016/j.talanta.2020.120779] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Revised: 01/09/2020] [Accepted: 01/22/2020] [Indexed: 12/11/2022]
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7
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Demirbakan B, Sezgintürk MK. A novel electrochemical immunosensor based on disposable ITO-PET electrodes for sensitive detection of PAK 2 antigen. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.113304] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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A disposable and ultrasensitive ITO based biosensor modified by 6-phosphonohexanoic acid for electrochemical sensing of IL-1β in human serum and saliva. Anal Chim Acta 2018; 1039:41-50. [DOI: 10.1016/j.aca.2018.07.055] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 07/19/2018] [Accepted: 07/23/2018] [Indexed: 01/11/2023]
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Aydın M, Aydın EB, Sezgintürk MK. A highly selective electrochemical immunosensor based on conductive carbon black and star PGMA polymer composite material for IL-8 biomarker detection in human serum and saliva. Biosens Bioelectron 2018; 117:720-728. [DOI: 10.1016/j.bios.2018.07.010] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2018] [Revised: 07/04/2018] [Accepted: 07/09/2018] [Indexed: 01/20/2023]
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Honikel MM, Lin CE, Cardinell BA, LaBelle JT, Penman AD. Direct Measurement of a Biomarker's Native Optimal Frequency with Physical Adsorption Based Immobilization. ACS Sens 2018. [PMID: 29533605 DOI: 10.1021/acssensors.8b00064] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The optimal frequency (OF) of a biomarker in electrochemical impedance spectroscopy (EIS) is the frequency at which the EIS response best reflects the binding of the biomarker to its molecular recognition element. Commonly, biosensors rely on complicated immobilization chemistry to attach biological molecules to the sensor surface, making the direct study of a biomarker's native OF a challenge. Physical adsorption presents a simple immobilization strategy to study the native biomarker's OF, but its utility is often discouraged due to a loss in biological activity. To directly study a biomarker's native OF and investigate the potential of OF to overcome the limitations of physical adsorption, a combination of EIS and glutaraldehyde-mediated physical adsorption was explored. The experimental sensing platform was prepared by immobilizing either anti-lactoferrin (Lfn) IgG or anti-immunoglobulin E (IgE) onto screen printed carbon electrodes. After characterizing the native OFs of both biomarkers, investigation of the platform's specificity, stability, and performance in complex medium was found to be sufficient. Finally, a paper-based tear sampling component was integrated to transform the testing platform into a prototypical point-of-care dry eye diagnostic. The investigation of native OFs revealed a correlation between the native OFs (57.44 and 371.1 Hz for Lfn and IgE, respectively) and the molecular weight of the antibody-antigen complex. Impedance responses at the native OFs have enabled detection limits of 0.05 mg/mL and 40 ng/mL for Lfn and IgE, respectively, covering the clinically relevant ranges. The native OFs were found to be robust across various testing mediums and conditions.
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Affiliation(s)
- Mackenzie M. Honikel
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona 85287, United States
| | - Chi-En Lin
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona 85287, United States
| | - Brittney A. Cardinell
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona 85287, United States
| | - Jeffrey T. LaBelle
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona 85287, United States
| | - Andrew D. Penman
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona 85287, United States
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11
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Törer H, Aydın EB, Sezgintürk MK. A label-free electrochemical biosensor for direct detection of RACK 1 by using disposable, low-cost and reproducible ITO based electrode. Anal Chim Acta 2018; 1024:65-72. [PMID: 29776548 DOI: 10.1016/j.aca.2018.04.031] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 03/29/2018] [Accepted: 04/05/2018] [Indexed: 02/08/2023]
Abstract
In this study we designed an ultrasensitive electrochemical immunosensor for RACK 1 detection using 11-cyanoundecyltrimethoxysilane (11-CUTMS) as a immobilization matrix to immobilize biorecognition element. The used silane agent (11-CUTMS) provides a favorable platform for efficient loading of anti-RACK 1 antibody. The effective loading of the biorecognition element on the 11-CUTMS matrix was monitored by scanning electron microscopy (SEM), atomic force microscopy (AFM) images and fourier transform infrared spectroscopy (FTIR) spectra. The electrochemical characterization of the immunosensor was performed by using electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) techniques. Moreover, biorecognition interaction between anti-RACK1 antibodies and RACK1 antigens was monitored by using single frequency technique (SFI). The operating conditions, calibration curves obtained during optimization of experiments and reproducibility of the proposed impedimetric RACK1 biosensor are also investigated and discussed. The electrochemical immunosensor illustrated a sensitive response to RACK 1 antigen with detection limit of 10.8 fg/mL and in the linear range of 0.036-2.278 pg/mL (R2 = 0.999). Owing to high specificity, good reproducibility, long stability and reusability, the fabricated immunosensor will provide a sensitive, selective approach to RACK 1 detection. Furthermore, the practical applicability in human serum samples were investigated with a satisfactory result.
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Affiliation(s)
- Hakan Törer
- Namık Kemal University, Faculty or Arts and Sciences, Chemistry Department, Tekirdağ, Turkey
| | - Elif Burcu Aydın
- Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart University, Faculty of Engineering, Bioengineering Department, Çanakkale, Turkey.
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12
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Rivera-Serrano N, Pagan M, Colón-Rodríguez J, Fuster C, Vélez R, Almodovar-Faria J, Jiménez-Rivera C, Cunci L. Static and Dynamic Measurement of Dopamine Adsorption in Carbon Fiber Microelectrodes Using Electrochemical Impedance Spectroscopy. Anal Chem 2018; 90:2293-2301. [PMID: 29260558 PMCID: PMC5957755 DOI: 10.1021/acs.analchem.7b04692] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In this study, electrochemical impedance spectroscopy was used for the first time to study the adsorption of dopamine in carbon fiber microelectrodes. In order to show a proof-of-concept, static and dynamic measurements were taken at potentials ranging from -0.4 to 0.8 V versus Ag|AgCl to demonstrate the versatility of this technique to study dopamine without the need of its oxidation. We used electrochemical impedance spectroscopy and single frequency electrochemical impedance to measure different concentrations of dopamine as low as 1 nM. Moreover, the capacitance of the microelectrodes surface was found to decrease due to dopamine adsorption, which is dependent on its concentration. The effect of dissolved oxygen and electrochemical oxidation of the surface in the detection of dopamine was also studied. Nonoxidized and oxidized carbon fiber microelectrodes were prepared and characterized by optical microscopy, scanning electron microscopy, cyclic voltammetry, and electrochemical impedance spectroscopy. Optimum working parameters of the electrodes, such as frequency and voltage, were obtained for better measurement. Electrochemical impedance of dopamine was determined at different concentration, voltages, and frequencies. Finally, dynamic experiments were conducted using a flow cell and single frequency impedance in order to study continuous and real-time measurements of dopamine.
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Affiliation(s)
- Nilka Rivera-Serrano
- Department of Chemistry, Universidad del Turabo, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Miraida Pagan
- Department of Chemistry, Universidad del Turabo, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Joanisse Colón-Rodríguez
- Department of Chemistry, Universidad del Turabo, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Christian Fuster
- Department of Chemistry, Universidad del Turabo, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Román Vélez
- Department of Chemistry, Universidad del Turabo, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Jose Almodovar-Faria
- Department of Electrical Engineering, Universidad del Turabo, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
| | - Carlos Jiménez-Rivera
- Department of Physiology, University of Puerto Rico, Medical Sciences Campus, San Juan, Puerto Rico 00936, United States
| | - Lisandro Cunci
- Department of Chemistry, Universidad del Turabo, Carr. 189, Km 3.3, Gurabo, Puerto Rico 00778, United States
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13
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Chen LS, Singh RJ. Niche point-of-care endocrine testing - Reviews of intraoperative parathyroid hormone and cortisol monitoring. Crit Rev Clin Lab Sci 2018; 55:115-128. [PMID: 29357735 DOI: 10.1080/10408363.2018.1425975] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Point-of-care (POC) testing, which provides quick test results in near-patient settings with easy-to-use devices, has grown continually in recent decades. Among near-patient and on-site tests, rapid intraoperative and intra-procedural assays are used to quickly deliver critical information and thereby improve patient outcomes. Rapid intraoperative parathyroid hormone (ioPTH) monitoring measures postoperative reduction of parathyroid hormone (PTH) to predict surgical outcome in patients with primary hyperparathyroidism, and therefore contributes to the change of parathyroidectomy to a minimally invasive procedure. In this review, recent progress in applying ioPTH monitoring to patients with secondary and tertiary hyperparathyroidism and other testing areas is discussed. In-suite cortisol monitoring facilitates the use of adrenal vein sampling (AVS) for the differential diagnosis of primary aldosteronism and adrenocorticotropic hormone (ACTH)-independent Cushing syndrome. In clinical and psychological research settings, POC testing is also useful for rapidly assessing cortisol in plasma and saliva samples as a biomarker of stress. Careful resource utilization and coordination among stakeholders help to determine the best approach for implementing cost-effective POC testing. Technical advances in integrating appropriate biosensors with microfluidics-based devices hold promise for future real-time POC cortisol monitoring.
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Affiliation(s)
- Li-Sheng Chen
- a Bureau of Laboratories , Michigan Department of Health and Human Services , Lansing , MI , USA
| | - Ravinder J Singh
- b Laboratory Medicine and Pathology , Mayo Clinic , Rochester , MN , USA
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14
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Aydın EB, Aydın M, Sezgintürk MK. A highly sensitive immunosensor based on ITO thin films covered by a new semi-conductive conjugated polymer for the determination of TNFα in human saliva and serum samples. Biosens Bioelectron 2017; 97:169-176. [DOI: 10.1016/j.bios.2017.05.056] [Citation(s) in RCA: 75] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 05/24/2017] [Accepted: 05/31/2017] [Indexed: 12/20/2022]
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15
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Gündoğdu A, Aydın EB, Sezgintürk MK. A novel electrochemical immunosensor based on ITO modified by carboxyl-ended silane agent for ultrasensitive detection of MAGE-1 in human serum. Anal Biochem 2017; 537:84-92. [PMID: 28916435 DOI: 10.1016/j.ab.2017.08.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Revised: 08/25/2017] [Accepted: 08/26/2017] [Indexed: 10/18/2022]
Abstract
A new, low-cost electrochemical immunosensor was developed for rapid detection of Melanoma-associated antigen 1 (MAGE-1), a cancer biomarker. The fabrication procedure of immunosensor was based on the covalent immobilization of anti-MAGE-1, biorecognition molecule, on ITO electrode by carboxyethylsilanetriol (CTES) monolayer. The biosensing MAGE-1 antigen was monitored by using electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV) technique. Apart from these techniques, single frequency impedance (SFI) was used for investigation of antibody-antigen interactions. Scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR), atomic force microscopy (AFM) were utilized for characterization of the proposed biosensor. To fabricate highly sensitive, good stability immunosensor, some parameters were optimized. Under optimal conditions, the developed electrochemical immunosensor for MAGE-1 exhibited a dynamic range of 4 fg/mL and 200 fg/mL with a low detection limit of 1.30 fg/mL. It had acceptable repeatability (5.05%, n = 20) and good storage stability (3.58% loss after 10 weeks). Moreover, this electrochemical immunosensor has been successfully applied to the determination of MAGE-1 in human serum samples.
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Affiliation(s)
- Aslı Gündoğdu
- Namık Kemal University, Faculty of Science, Chemistry Department, Biochemistry Division, Tekirdağ, Turkey
| | - Elif Burcu Aydın
- Namık Kemal University, Scientific and Technological Research Center, Tekirdağ, Turkey.
| | - Mustafa Kemal Sezgintürk
- Çanakkale Onsekiz Mart University, Faculty of Engineering, Bioengineering Department, Çanakkale, Turkey
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16
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Holzer B, Manoli K, Ditaranto N, Macchia E, Tiwari A, Di Franco C, Scamarcio G, Palazzo G, Torsi L. Characterization of Covalently Bound Anti-Human Immunoglobulins on Self-Assembled Monolayer Modified Gold Electrodes. ACTA ACUST UNITED AC 2017; 1:e1700055. [DOI: 10.1002/adbi.201700055] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Revised: 04/06/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Brigitte Holzer
- Dipartimento di Chimica; Università degli Studi di Bari - “Aldo Moro”; Via Orabona 4 70126 Bari Italy
| | - Kyriaki Manoli
- Dipartimento di Chimica; Università degli Studi di Bari - “Aldo Moro”; Via Orabona 4 70126 Bari Italy
| | - Nicoletta Ditaranto
- Dipartimento di Chimica; Università degli Studi di Bari - “Aldo Moro”; Via Orabona 4 70126 Bari Italy
- CSGI (Center for Colloid and Surface Science) - Bari; Via Orabona 4 70126 Bari Italy
| | - Eleonora Macchia
- Dipartimento di Chimica; Università degli Studi di Bari - “Aldo Moro”; Via Orabona 4 70126 Bari Italy
| | - Amber Tiwari
- Dipartimento di Chimica; Università degli Studi di Bari - “Aldo Moro”; Via Orabona 4 70126 Bari Italy
| | - Cinzia Di Franco
- CNR - Istituto di Fotonica e Nanotecnologie; Sede di Bari; Via Orabona 4 70126 Bari Italy
| | - Gaetano Scamarcio
- CNR - Istituto di Fotonica e Nanotecnologie; Sede di Bari; Via Orabona 4 70126 Bari Italy
- Dipartimento di Fisica “M. Merlin” - Università degli Studi di Bari - “Aldo Moro”; Via Orabona 4 70126 Bari Italy
| | - Gerardo Palazzo
- Dipartimento di Chimica; Università degli Studi di Bari - “Aldo Moro”; Via Orabona 4 70126 Bari Italy
- CSGI (Center for Colloid and Surface Science) - Bari; Via Orabona 4 70126 Bari Italy
| | - Luisa Torsi
- Dipartimento di Chimica; Università degli Studi di Bari - “Aldo Moro”; Via Orabona 4 70126 Bari Italy
- CSGI (Center for Colloid and Surface Science) - Bari; Via Orabona 4 70126 Bari Italy
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A sensitive and disposable electrochemical immunosensor for detection of SOX2, a biomarker of cancer. Talanta 2017; 172:162-170. [PMID: 28602290 DOI: 10.1016/j.talanta.2017.05.048] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2017] [Revised: 05/11/2017] [Accepted: 05/15/2017] [Indexed: 11/24/2022]
Abstract
A novel, sensitive, disposable indium tin oxide (ITO)-based electrochemical immunosensor was developed firstly for simple, rapid determination of Sex-determining region Y-box 2 (SOX2). SOX2 is a cancer biomarker and used for detecting small cell lung cancer, lung adenocarcinoma, squamous cell carcinoma, skin cancer, prostate cancer, and breast cancer. In this study, a disposable ITO thin film based electrode was used as working electrode for biosensing the interaction between SOX2 antigen and anti-SOX2 antibody. In this study, carboxyethylsilanetriol (CTES) was also utilized for electrode modifying so as to obtain self-assembled monolayers. The formed self-assembled monolayers were activated with 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide (EDC)/N-hydroxysuccinimide (NHS) chemistry and they were used as a heterobifunctional crosslinker and activator, respectively. Anti-SOX2 antibody was used as a biorecognition molecule and was covalently immobilized onto the ITO thin film modified with CTES. Immobilization steps were characterized by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The optimum immobilization conditions such as antibody concentration, antibody and antigen incubation times were examined for the best sensitivity of the immunosensor. Under optimal conditions, this immunosensor had a wide linear detection range (25fg/mL-2pg/mL) with a detection limit as low as 7fg/mL SOX2. Furthermore, the developed SOX2 immunosensor had good storage stability (79.36% of initial activity after 9 weeks), repeatability (3.88% of RSD) and reproducibility (4.25% of RSD). Our developed immunosensor has an acceptable performance for detection of SOX2 antigen, exhibits low detection limit, and has selective and reproducible results in immunoreaction analysis.
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18
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Demirbakan B, Sezgintürk MK. A sensitive and disposable indium tin oxide based electrochemical immunosensor for label-free detection of MAGE-1. Talanta 2017; 169:163-169. [PMID: 28411807 DOI: 10.1016/j.talanta.2017.03.076] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Revised: 03/20/2017] [Accepted: 03/25/2017] [Indexed: 01/21/2023]
Abstract
MAGE-1 (MAGE, for melanoma antigen), was identified by virtue of its processing and cell surface expression as a tumor-specific peptide bound to major histocompatibility complexes which was reactive with autolytic T cells. 3-Glycidoxypropyltrimethoxysilane (3-GOPS) is frequently employed for the preparation of dense heterometal hybrid polymers which are used, e.g., for hard coatings of organic polymers and contact lens materials in the optical industry. In this study, we have improved a new immunological biosensor with indium tin oxide (ITO). Then, Anti-MAGE-1 antibody was covalently immobilized with 3-GOPS which formed a self-assembled monolayers (SAMs) on modified ITO electrodes. Analytical characteristics such as square wave voltammetry, linear determination range, repeatability, reproducibility and regeneration of biosensors are determined. All characterization steps are monitored by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV). The developed biosensor has wide determination range (0.5fg-15fg/mL). To investigate long shelf life of the fabricated biosensor, the immunosensors were stored at 4°C for periods ten weeks. Futhermore, binding kinetics of MAGE1 to antiMAGE-1 is monitored by single frequency technique in real time. Additionally, Kramer's-Kronig transform was used to understand whether the impedance spectra of biosensor system are affected from the variation that occurred because of external factor. Morphological characteristics of constructed biosensor were observed by scanning electron microscopy. Real human serum samples were also analyzed by the proposed biosensor, successfully. A commercial ELISA kit was also used as a reference method to validate the results obtained by the biosensor. Finally, this biosensor was tried in real blood sample and that showed it could be utilized in clinical applications. This biosensor can be preferred due to it has a wide linear range and it can be prepared easily.
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Affiliation(s)
- Burçak Demirbakan
- Namık Kemal University, Faculty of Science, Chemistry Department, Biochemistry Division, Tekirdağ, Turkey.
| | - Mustafa Kemal Sezgintürk
- Çanakkale Eighteen March University, Faculty of Engineering, Bioengineering Department, Çanakkale, Turkey.
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Dervisevic M, Senel M, Cevik E. Novel impedimetric dopamine biosensor based on boronic acid functional polythiophene modified electrodes. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 72:641-649. [DOI: 10.1016/j.msec.2016.11.127] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 09/21/2016] [Accepted: 11/27/2016] [Indexed: 01/23/2023]
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20
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Dervisevic M, Şenel M, Sagir T, Isik S. Boronic Acid vs. Folic Acid: A Comparison of the bio-recognition performances by Impedimetric Cytosensors based on Ferrocene cored dendrimer. Biosens Bioelectron 2017; 91:680-686. [PMID: 28113133 DOI: 10.1016/j.bios.2017.01.030] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/12/2017] [Accepted: 01/13/2017] [Indexed: 11/16/2022]
Abstract
A comparative study is reported where folic acid (FA) and boronic acid (BA) based cytosensors and their analytical performances in cancer cell detection were analyzed by using electrochemical impedance spectroscopy (EIS) method. Cytosensors were fabricated using self-assembled monolayer principle by modifying Au electrode with cysteamine (Cys) and immobilization of ferrocene cored polyamidiamine dendrimers second generation (Fc-PAMAM (G2)), after which electrodes were modified with FA and BA. Au/Fc-PAMAM(G2)/FA and Au/Fc-PAMAM(G2)/BA based cytosensors showed extremely good analytical performances in cancer cell detection with linear range of 1×102 to 1×106cellsml-1, detection limit of 20cellsml-1 with incubation time of 20min for FA based electrode, and for BA based electrode detection limit was 28cellsml-1 with incubation time of 10min. Next to excellent analytical performances, cytosensors showed high selectivity towards cancer cells which was demonstrated in selectivity study using human embryonic kidney 293 cells (HEK 293) as normal cells and Au/Fc-PAMAM(G2)/FA electrode showed two times better selectivity than BA modified electrode. These cytosensors are promising for future applications in cancer cell diagnosis.
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Affiliation(s)
- Muamer Dervisevic
- Biotechnology Research Lab, EMC Technology Inc, ARGEM Building, Technocity, Avcılar, Istanbul 34320, Turkey
| | - Mehmet Şenel
- Biotechnology Research Lab, EMC Technology Inc, ARGEM Building, Technocity, Avcılar, Istanbul 34320, Turkey.
| | - Tugba Sagir
- Orta Mah. Sunay Sok. No 1, Kartal, Istanbul 34880, Turkey
| | - Sevim Isik
- Biotechnology Research Lab, EMC Technology Inc, ARGEM Building, Technocity, Avcılar, Istanbul 34320, Turkey
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21
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A novel immunosensor based on fullerene C60 for electrochemical analysis of heat shock protein 70. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.11.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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22
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Dervisevic M, Senel M, Sagir T, Isik S. Highly sensitive detection of cancer cells with an electrochemical cytosensor based on boronic acid functional polythiophene. Biosens Bioelectron 2016; 90:6-12. [PMID: 27866080 DOI: 10.1016/j.bios.2016.10.100] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 10/27/2016] [Accepted: 10/28/2016] [Indexed: 10/20/2022]
Abstract
The detection of cancer cells through important molecular recognition target such as sialic acid is significant for the clinical diagnosis and treatment. There are many electrochemical cytosensors developed for cancer cells detection but most of them have complicated fabrication processes which results in poor reproducibility and reliability. In this study, a simple, low-cost, and highly sensitive electrochemical cytosensor was designed based on boronic acid-functionalized polythiophene. In cytosensors fabrication simple single-step procedure was used which includes coating pencil graphite electrode (PGE) by means of electro-polymerization of 3-Thienyl boronic acid and Thiophen. Electrochemical impedance spectroscopy and cyclic voltammetry were used as an analytical methods to optimize and measure analytical performances of PGE/P(TBA0.5Th0.5) based electrode. Cytosensor showed extremely good analytical performances in detection of cancer cells with linear rage of 1×101 to 1×106 cellsmL-1 exhibiting low detection limit of 10 cellsmL-1 and incubation time of 10min. Next to excellent analytical performances, it showed high selectivity towards AGS cancer cells when compared to HEK 293 normal cells and bone marrow mesenchymal stem cells (BM-hMSCs). This method is promising for future applications in early stage cancer diagnosis.
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Affiliation(s)
- Muamer Dervisevic
- Biotechnology Research Lab, EMC Technology Inc, ARGEM Building, Technocity, Avcılar, Istanbul 34320, Turkey
| | - Mehmet Senel
- Biotechnology Research Lab, EMC Technology Inc, ARGEM Building, Technocity, Avcılar, Istanbul 34320, Turkey.
| | - Tugba Sagir
- Orta Mah. Sunay Sok. No 1, Kartal, Istanbul 34880, Turkey
| | - Sevim Isik
- Biotechnology Research Lab, EMC Technology Inc, ARGEM Building, Technocity, Avcılar, Istanbul 34320, Turkey
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23
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Graphene oxide based electrochemical label free immunosensor for rapid and highly sensitive determination of tumor marker HSP70. Talanta 2016; 160:367-374. [DOI: 10.1016/j.talanta.2016.07.039] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 07/10/2016] [Accepted: 07/20/2016] [Indexed: 11/18/2022]
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24
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Asav E, Sağıroğlu A, Sezgintürk MK. Quantitative Analysis of a Promising Cancer Biomarker, Calretinin, by a Biosensing System Based on Simple and Effective Immobilization Process. ELECTROANAL 2016. [DOI: 10.1002/elan.201500324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Derkus B, Ozkan M, Emregul KC, Emregul E. Single frequency analysis for clinical immunosensor design. RSC Adv 2016. [DOI: 10.1039/c5ra23783a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
A novel bioelectrochemical approach: Tau protein determination for the diagnosis of neurodiseases via time-dependant phase angle shift.
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Affiliation(s)
- Burak Derkus
- Bioelectrochemistry Lab
- Department of Chemistry
- Science Faculty
- Ankara University
- Ankara 06100
| | - Mustafa Ozkan
- Bioelectrochemistry Lab
- Department of Chemistry
- Science Faculty
- Ankara University
- Ankara 06100
| | - Kaan C. Emregul
- Bioelectrochemistry Lab
- Department of Chemistry
- Science Faculty
- Ankara University
- Ankara 06100
| | - Emel Emregul
- Bioelectrochemistry Lab
- Department of Chemistry
- Science Faculty
- Ankara University
- Ankara 06100
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26
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A new immobilization procedure for development of an electrochemical immunosensor for parathyroid hormone detection based on gold electrodes modified with 6-mercaptohexanol and silane. Talanta 2015; 144:210-8. [DOI: 10.1016/j.talanta.2015.06.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2015] [Revised: 05/30/2015] [Accepted: 06/03/2015] [Indexed: 11/17/2022]
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27
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Alenezi H, Olvera-Posada D, Cadieux PA, Denstedt JD, Razvi H. The Effect of Renal Cysts on the Fragmentation of Renal Stones During Shockwave Lithotripsy: A Comparative In Vitro Study. J Endourol 2015; 30 Suppl 1:S12-7. [PMID: 26414112 DOI: 10.1089/end.2015.0253] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE To assess the potential effect of simple renal cysts (SRC) on stone fragmentation during shockwave lithotripsy (SWL) in an in vitro model. MATERIALS AND METHODS The in vitro model was constructed using 10% ordnance gelatin (OG). Models were created to mimic four scenarios: Model A-with an air-filled cavity (suboptimal for stone fragmentation); model B-without a cavity (normal anatomy); model C-with a 3-cm serum filled cavity (to represent a small SRC); model D-with a 4-cm serum filled cavity (to represent a larger SRC). SWL was applied to 24 standardized phantom stones (weight of 2±0.1 g) in each model using a standardized protocol. Stone fragments were retrieved, then dried overnight at room air temperature. Fragmentation coefficient (FC) was calculated for each stone, for fragments<4 mm and <2 mm. RESULTS The OG in vitro model was robust enough for the proposed research. There was no fragmentation evident in model A as expected. The mean FC was 29.7 (±20.5) and 39.7 (±23.7) for <4 mm fragments (P=0.069) and 7.6 (±4.1) and 10.6 (±6.7) for <2 mm fragments (P=0.047), for noncystic and cystic models, respectively. The mean FC was 29.7 (±20.5), 38.8 (±26.2) and 40.7 (±21.3) for <4 mm fragments (P=0.213) and 7.6 (±4.1), 11.1 (±8) and 10.2 (±5.3) for <2 mm fragments (P=0.138), for models B, C, and D, respectively. CONCLUSION Our in vitro experiment confirms better stone fragmentation associated with SWL in the presence of adjacent SRC.
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Affiliation(s)
- Husain Alenezi
- 1 Division of Urology, Department of Surgery, Schulich School of Medicine and Dentistry, The University of Western Ontario , London, Ontario, Canada
| | - Daniel Olvera-Posada
- 1 Division of Urology, Department of Surgery, Schulich School of Medicine and Dentistry, The University of Western Ontario , London, Ontario, Canada
| | - Peter A Cadieux
- 2 Department of Microbiology and Immunology, The University of Western Ontario , London, Ontario, Canada .,3 School of Health Sciences, Fanshawe College , London, Ontario, Canada
| | - John D Denstedt
- 1 Division of Urology, Department of Surgery, Schulich School of Medicine and Dentistry, The University of Western Ontario , London, Ontario, Canada
| | - Hassan Razvi
- 1 Division of Urology, Department of Surgery, Schulich School of Medicine and Dentistry, The University of Western Ontario , London, Ontario, Canada
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28
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Sun Y, Du H, Feng C, Lan Y. Oriented immobilization of antibody through carbodiimide reaction and controlling electric field. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-015-2912-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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29
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Bahadır EB, Sezgintürk MK. Electrochemical biosensors for hormone analyses. Biosens Bioelectron 2015; 68:62-71. [DOI: 10.1016/j.bios.2014.12.054] [Citation(s) in RCA: 93] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 12/20/2014] [Accepted: 12/22/2014] [Indexed: 11/26/2022]
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30
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Ultrasensitive Impedimetric Biosensor Fabricated by a New Immobilisation Technique for Parathyroid Hormone. Appl Biochem Biotechnol 2015; 176:1251-62. [DOI: 10.1007/s12010-015-1643-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 04/21/2015] [Indexed: 10/23/2022]
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31
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Patil AV, Bedatty Fernandes FC, Bueno PR, Davis JJ. Immittance Electroanalysis in Diagnostics. Anal Chem 2014; 87:944-50. [DOI: 10.1021/ac503156a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Amol V. Patil
- Department
of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Flávio C. Bedatty Fernandes
- Institute
of Chemistry, Physical Chemistry Department, Univ. Estadual Paulista (São Paulo State University), Nanobionics Research Group, CP 355, 14800-900, Araraquara, São
Paulo, Brazil
| | - Paulo R. Bueno
- Institute
of Chemistry, Physical Chemistry Department, Univ. Estadual Paulista (São Paulo State University), Nanobionics Research Group, CP 355, 14800-900, Araraquara, São
Paulo, Brazil
| | - Jason J. Davis
- Department
of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
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