1
|
Kokoskarova P, Stojanov L, Najkov K, Ristovska N, Ruskovska T, Skrzypek S, Mirceski V. Square-wave voltammetry of human blood serum. Sci Rep 2023; 13:8485. [PMID: 37231085 DOI: 10.1038/s41598-023-34350-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 04/27/2023] [Indexed: 05/27/2023] Open
Abstract
A study on voltammetric analysis of blood serum diluted in a phosphate buffer is presented using advanced square-wave voltammetry at an edge plane pyrolytic graphite electrode. The results demonstrate that even in a complex medium like human blood serum, electrochemical characterization can be achieved through the use of advanced voltammetric techniques in conjunction with an appropriate commercially available electrode, such as the edge plane pyrolytic graphite electrode, which boosts superior electrocatalytic properties. Without undergoing any chemical treatment of the serum sample, the square-wave voltammetry technique reveals, for the first time, the electrode reactions of uric acid, bilirubin, and albumin in a single experiment, as represented by well-defined, separated, and intense voltammetric signals. All electrode processes are surface-confined, indicating that the edge plane sites of the electrode serve as an ideal platform for the competitive adsorption of electroactive species, despite the extensive chemical complexity of the serum samples. The speed and differential nature of square-wave voltammetry are crucial for obtaining an outstanding resolution of the voltammetric peaks, maintaining the quasi-reversible nature of the underlying electrode processes, while reducing the impact of follow-up chemical reactions that are coupled to the initial electron transfer for all three detected species, and minimizing fouling of the electrode surface.
Collapse
Affiliation(s)
- Pavlinka Kokoskarova
- Faculty of Medical Sciences, Goce Delcev University, Krste Misirkov 10A, 2000, Stip, Republic of North Macedonia
| | - Leon Stojanov
- Institute of Chemistry, Faculty of Natural Sciences and Mathematics, "Ss Cyril and Methodius" University in Skopje, P.O. Box 162, 1000, Skopje, Republic of North Macedonia
| | - Kosta Najkov
- Institute of Chemistry, Faculty of Natural Sciences and Mathematics, "Ss Cyril and Methodius" University in Skopje, P.O. Box 162, 1000, Skopje, Republic of North Macedonia
| | - Natasha Ristovska
- Institute of Chemistry, Faculty of Natural Sciences and Mathematics, "Ss Cyril and Methodius" University in Skopje, P.O. Box 162, 1000, Skopje, Republic of North Macedonia
| | - Tatjana Ruskovska
- Faculty of Medical Sciences, Goce Delcev University, Krste Misirkov 10A, 2000, Stip, Republic of North Macedonia
| | - Sławomira Skrzypek
- Department of Inorganic and Analytical Chemistry, University of Lodz, Tamka 12, 91-403, Lodz, Poland
| | - Valentin Mirceski
- Institute of Chemistry, Faculty of Natural Sciences and Mathematics, "Ss Cyril and Methodius" University in Skopje, P.O. Box 162, 1000, Skopje, Republic of North Macedonia.
- Department of Inorganic and Analytical Chemistry, University of Lodz, Tamka 12, 91-403, Lodz, Poland.
- Research Center for Environment and Materials, Macedonian Academy of Sciences and Arts, Bul. Krste Misirkov 2, 1000, Skopje, Republic of North Macedonia.
| |
Collapse
|
2
|
Markandan K, Tiong YW, Sankaran R, Subramanian S, Markandan UD, Chaudhary V, Numan A, Khalid M, Walvekar R. Emergence of infectious diseases and role of advanced nanomaterials in point-of-care diagnostics: a review. Biotechnol Genet Eng Rev 2022:1-89. [PMID: 36243900 DOI: 10.1080/02648725.2022.2127070] [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: 06/08/2022] [Accepted: 09/12/2022] [Indexed: 11/09/2022]
Abstract
Infectious outbreaks are the foremost global public health concern, challenging the current healthcare system, which claims millions of lives annually. The most crucial way to control an infectious outbreak is by early detection through point-of-care (POC) diagnostics. POC diagnostics are highly advantageous owing to the prompt diagnosis, which is economical, simple and highly efficient with remote access capabilities. In particular, utilization of nanomaterials to architect POC devices has enabled highly integrated and portable (compact) devices with enhanced efficiency. As such, this review will detail the factors influencing the emergence of infectious diseases and methods for fast and accurate detection, thus elucidating the underlying factors of these infections. Furthermore, it comprehensively highlights the importance of different nanomaterials in POCs to detect nucleic acid, whole pathogens, proteins and antibody detection systems. Finally, we summarize findings reported on nanomaterials based on advanced POCs such as lab-on-chip, lab-on-disc-devices, point-of-action and hospital-on-chip. To this end, we discuss the challenges, potential solutions, prospects of integrating internet-of-things, artificial intelligence, 5G communications and data clouding to achieve intelligent POCs.
Collapse
Affiliation(s)
- Kalaimani Markandan
- Temasek Laboratories, Nanyang Technological University, Nanyang Drive, Singapore
- Faculty of Engineering, Technology and Built Environment, UCSI University, Kuala Lumpur, Malaysia
| | - Yong Wei Tiong
- NUS Environmental Research Institute, National University of Singapore, Engineering Drive, Singapore
| | - Revathy Sankaran
- Graduate School, University of Nottingham Malaysia Campus, Semenyih, Selangor, Malaysia
| | - Sakthinathan Subramanian
- Department of Materials & Mineral Resources Engineering, National Taipei University of Technology (NTUT), Taipei, Taiwan
| | | | - Vishal Chaudhary
- Research Cell & Department of Physics, Bhagini Nivedita College, University of Delhi, New Delhi, India
| | - Arshid Numan
- Graphene & Advanced 2D Materials Research Group (GAMRG), School of Engineering and Technology, Sunway University, Petaling Jaya, Selangor, Malaysia
- Sunway Materials Smart Science & Engineering (SMS2E) Research Cluster School of Engineering and Technology, Sunway University, Selangor, Malaysia
| | - Mohammad Khalid
- Graphene & Advanced 2D Materials Research Group (GAMRG), School of Engineering and Technology, Sunway University, Petaling Jaya, Selangor, Malaysia
- Sunway Materials Smart Science & Engineering (SMS2E) Research Cluster School of Engineering and Technology, Sunway University, Selangor, Malaysia
| | - Rashmi Walvekar
- Department of Chemical Engineering, School of Energy and Chemical Engineering, Xiamen University Malaysia, Sepang, Selangor, Malaysia
| |
Collapse
|
3
|
Enhanced immunoassay in a nanofluidic preconcentrator utilizing nano-interstices among self-assembled gold nanoparticles. Biomed Microdevices 2022; 24:19. [DOI: 10.1007/s10544-022-00619-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2022] [Indexed: 11/02/2022]
|
4
|
Development of a textile based protein sensor for monitoring the healing progress of a wound. Sci Rep 2022; 12:7972. [PMID: 35562402 PMCID: PMC9106706 DOI: 10.1038/s41598-022-11982-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 04/25/2022] [Indexed: 11/30/2022] Open
Abstract
This article focuses on the design and fabrication of flexible textile-based protein sensors to be embedded in wound dressings. Chronic wounds require continuous monitoring to prevent further complications and to determine the best course of treatment in the case of infection. As proteins are essential for the progression of wound healing, they can be used as an indicator of wound status. Through measuring protein concentrations, the sensor can assess and monitor the wound condition continuously as a function of time. The protein sensor consists of electrodes that are directly screen printed using both silver and carbon composite inks on polyester nonwoven fabric which was deliberately selected as this is one of the common backing fabric types currently used in wound dressings. These sensors were experimentally evaluated and compared to each other by using albumin protein solution of pH 7. A comprehensive set of cyclic voltammetry measurements was used to determine the optimal sensor design the measurement of protein in solution. As a result, the best sensor design is comprised of silver conductive tracks but a carbon layer as the working and counter electrodes at the interface zone. This design prevents the formation of silver dioxide and protects the sensor from rapid decay, which allows for the recording of consecutive measurements using the same sensor. The chosen printed protein sensor was able to detect bovine serum albumin at concentrations ranging from 30 to 0.3 mg/mL with a sensitivity of \documentclass[12pt]{minimal}
\usepackage{amsmath}
\usepackage{wasysym}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsbsy}
\usepackage{mathrsfs}
\usepackage{upgreek}
\setlength{\oddsidemargin}{-69pt}
\begin{document}$$0.0026 \mu $$\end{document}0.0026μA/M. Further testing was performed to assess the sensor’s ability to identify BSA from other interferential substances usually present in wound fluids and the results show that it can be distinguishable.
Collapse
|
5
|
Kim M, Iezzi R, Shim BS, Martin DC. Impedimetric Biosensors for Detecting Vascular Endothelial Growth Factor (VEGF) Based on Poly(3,4-ethylene dioxythiophene) (PEDOT)/Gold Nanoparticle (Au NP) Composites. Front Chem 2019; 7:234. [PMID: 31058131 PMCID: PMC6477177 DOI: 10.3389/fchem.2019.00234] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Accepted: 03/25/2019] [Indexed: 11/17/2022] Open
Abstract
In advanced forms of diabetic retinopathy, retinal vascular occlusive disease and exudative age-related macular degeneration, vision loss is associated with elevated levels or extravasation of vascular endothelial-derived growth factor (VEGF) into the retina, vitreous, and anterior chamber of the eye. We hypothesize that point-of-care biosensors, capable of rapidly and precisely measuring VEGF levels within the eye will assist clinicians in assessing disease severity, and in establishing individualized dosing intervals for intraocular anti-VEGF injection therapy. An impedance biosensor based on a poly(3,4-ethylenedioxythiophene) (PEDOT)/gold nanoparticle (Au NP) composite was developed for detecting VEGF. PEDOT with Au NP was electrochemically deposited on three different medical electrode sensor designs: free-standing pads, screen printed dots, and interdigitated micro-strip electrodes. Anti-VEGF antibody was covalently immobilized on the surface of the polymer films through attachment to citrate-functionalized Au NPs, and the resulting composites were used to detect VEGF-165 by electrochemical impedance spectroscopy (EIS). The PEDOT-Au NP composite materials were characterized using optical microscopy, SEM/EDS, FIB, TEM, and STEM techniques. Among the different micro-electrodes, the interdigitated strip shape showed the best overall film stability and reproducibility. A linear relationship was established between the charge transfer resistance (Rct) and VEGF concentration. The detection limit of VEGF was found to be 0.5 pg/mL, with a correlation coefficient of 0.99 ± 0.064%. These results indicate that the proposed PEDOT/Au NP composites can be used in designing low-cost and accurate VEGF biosensors for applications such as clinical diagnosis of VEGF-mediated eye disease.
Collapse
Affiliation(s)
- Minsoo Kim
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, United States
| | - Raymond Iezzi
- Department of Ophthalmology, Mayo Clinic, Rochester, MN, United States
| | - Bong Sup Shim
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, United States.,Department of Chemical Engineering, Inha University, Incheon, South Korea
| | - David C Martin
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, United States
| |
Collapse
|
6
|
Molina DE, Medina AS, Beyenal H, Ivory CF. Design and Finite Element Model of a Microfluidic Platform with Removable Electrodes for Electrochemical Analysis. JOURNAL OF THE ELECTROCHEMICAL SOCIETY 2019; 166:B125-B132. [PMID: 31341328 PMCID: PMC6656400 DOI: 10.1149/2.0891902jes] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A microfluidic platform for hydrodynamic electrochemical analysis was developed, consisting of a poly(methyl methacrylate) chip and three removable electrodes, each housed in 1/16" OD polyether ether ketone tube which can be removed independently for polishing or replacement. The working electrode was a 100-μm diameter Pt microdisk, located flush with the upper face of a 150 μm × 20 μm × 3 cm microchannel, smaller than previously reported for these types of removable electrodes. A commercial leak-less reference electrode was utilized, and a coiled platinum wire was the counter electrode. The platform was evaluated electrochemically by oxidizing a potassium ferrocyanide solution at the working electrode, and a typical limiting current behavior was observed after running linear sweep voltammetry and chronoamperometry, with flow rates 1-6 μL/min. While microdisk channel electrodes have been simulated before using a finite difference method in an ideal 3D geometry, here we predict the limiting current using finite elements in COMSOL Multiphysics 5.3a, which allowed us to easily explore variations in the microchannel geometry that have not previously been considered in the literature. Experimental and simulated currents showed the same trend but differed by 41% in simulations of the ideal geometry, which improved when channel and electrode imperfections were included.
Collapse
Affiliation(s)
| | - Adan Schafer Medina
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, USA
| | | | - Cornelius F. Ivory
- The Gene and Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, Pullman, Washington 99163, USA
| |
Collapse
|
7
|
Glassy carbon electrodes modified with supramolecular assemblies generated by π-stacking of Cobalt (II) octaethylporphyrins. A 4 electrons-dioxygen reduction reaction occurring at positive potentials. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.05.124] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
8
|
Impact of Electrochemical Impedance Spectroscopy Experimental Variables on Adsorbed Protein Films, as Illustrated by Bovine Serum Albumin. ELECTROANAL 2015. [DOI: 10.1002/elan.201500130] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
9
|
Singal S, Srivastava AK, Dhakate S, Biradar AM, Rajesh R. Electroactive graphene-multi-walled carbon nanotube hybrid supported impedimetric immunosensor for the detection of human cardiac troponin-I. RSC Adv 2015. [DOI: 10.1039/c5ra15449a] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
We report a sensitive and stable electrochemical impedance immunosensor prepared with electroactive three-dimensional graphene-multi-walled carbon nanotube hybrid deposited on a glassy carbon electrode.
Collapse
Affiliation(s)
- Shobhita Singal
- CSIR-National Physical Laboratory
- New Delhi-110012
- India
- Academy of Scientific & Innovative Research (AcSIR)
- New Delhi
| | | | | | | | - Rajesh Rajesh
- CSIR-National Physical Laboratory
- New Delhi-110012
- India
- Academy of Scientific & Innovative Research (AcSIR)
- New Delhi
| |
Collapse
|
10
|
Kanungo I, Fathima NN, Jonnalagadda RR, Nair BU. Go natural and smarter: fenugreek as a hydration designer of collagen based biomaterials. Phys Chem Chem Phys 2015; 17:2778-93. [DOI: 10.1039/c4cp04363d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A facile and convenient strategy to design the solvation network of collagen, using fenugreek has been investigated. This can be explored for the smart biomaterial applications.
Collapse
Affiliation(s)
- Ivy Kanungo
- Chemical Laboratory
- Council of Scientific and Industrial Research-Central Leather Research Institute
- Chennai 600020
- India
| | - Nishter Nishad Fathima
- Chemical Laboratory
- Council of Scientific and Industrial Research-Central Leather Research Institute
- Chennai 600020
- India
| | - Raghava Rao Jonnalagadda
- Chemical Laboratory
- Council of Scientific and Industrial Research-Central Leather Research Institute
- Chennai 600020
- India
| | - Balachandran Unni Nair
- Chemical Laboratory
- Council of Scientific and Industrial Research-Central Leather Research Institute
- Chennai 600020
- India
| |
Collapse
|
11
|
Prasad BB, Jauhari D, Tiwari MP. Doubly imprinted polymer nanofilm-modified electrochemical sensor for ultra-trace simultaneous analysis of glyphosate and glufosinate. Biosens Bioelectron 2014; 59:81-8. [PMID: 24704689 DOI: 10.1016/j.bios.2014.03.019] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Revised: 02/20/2014] [Accepted: 03/03/2014] [Indexed: 10/25/2022]
Abstract
A rapid, selective, and sensitive double-template imprinted polymer nanofilm-modified pencil graphite electrode was fabricated for the simultaneous analysis of phosphorus-containing amino acid-type herbicides (glyphosate and glufosinate) in soil and human serum samples. Since both herbicides respond overlapped oxidation peaks and only glyphosate is prone to nitrosation, n-nitroso glyphosate and glufosinate were used as templates for obtaining the well-resolved quantitative differential pulse anodic stripping voltammetric peaks on the proposed sensor. Toward sensor fabrication, a nano-structured polymer film was first grown directly on the electrode via initial immobilization of gold nanoparticles at its surface. This was followed by linking of monomeric (N-methacryloyl-l-cysteine) molecules through S-Au bonds. Subsequently, these molecules were subjected to free radical polymerization, in the presence of templates, cross linker, initiator, and multiwalled carbon nanotubes as pre-polymer mixture. The modified sensor observed wide linear ranges (3.98-176.23 ng mL(-1) and 0.54-3.96 ng mL(-1)) of simultaneous analysis with detection limits as low as 0.35 and 0.19 ng mL(-1) (S/N=3) for glyphosate and glufosinate, respectively, in aqueous samples. The respective oxidation peak potentials of both analytes were found to be substantially apart by 265 mV. This enabled the simultaneous determination of one target in the presence of other, without any cross reactivity, interferences, and false-positives, in real samples.
Collapse
Affiliation(s)
- Bhim Bali Prasad
- Analytical Division, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India.
| | - Darshika Jauhari
- Analytical Division, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India
| | - Mahavir Prasad Tiwari
- Analytical Division, Department of Chemistry, Faculty of Science, Banaras Hindu University, Varanasi 221005, India
| |
Collapse
|
12
|
Lucas FWDS, Mascaro LH, Fill TP, Rodrigues-Filho E, Franco-Junior E, Homem-de-Mello P, de Lima-Neto P, Correia AN. Diclofenac on boron-doped diamond electrode: from electroanalytical determination to prediction of the electrooxidation mechanism with HPLC-ESI/HRMS and computational simulations. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:5645-5654. [PMID: 24806390 DOI: 10.1021/la4044123] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Using square-wave voltammetry coupled to the boron-doped diamond electrode (BDDE), it was possible to develop an analytical methodology for identification and quantification of diclofenac (DCL) in tablets and synthetic urine. The electroanalytical procedure was validated, with results being statistically equal to those obtained by chromatographic standard method, showing linear range of 4.94 × 10(-7) to 4.43 × 10(-6) mol L(-1), detection limit of 1.15 × 10(-7) mol L(-1), quantification limit of 3.85 × 10(-7) mol L(-1), repeatability of 3.05% (n = 10), and reproducibility of 1.27% (n = 5). The association of electrochemical techniques with UV-vis spectroscopy, computational simulations and HPLC-ESI/HRMS led us to conclude that the electrooxidation of DCL on the BDDE involved two electrons and two protons, where the products are colorful and easily hydrolyzable dimers. Density functional theory calculations allowed to evaluate the stability of dimers A, B, and C, suggesting dimer C was more stable than the other two proposed structures, ca. 4 kcal mol(-1). The comparison of the dimers stabilities with the stabilities of the molecular ions observed in the MS, the compounds that showed retention time (RT) of 15.53, 21.44, and 22.39 min were identified as the dimers B, C, and A, respectively. Corroborating the observed chromatographic profile, dimer B had a dipole moment almost twice higher than that of dimers A and C. As expected, dimer B has really shorter RT than dimers A and C. The majority dimer was the A (71%) and the C (19.8%) should be the minority dimer. However, the minority was the dimer B, which was formed in the proportion of 9.2%. This inversion between the formation proportion of dimer B and dimer C can be explained by preferential conformation of the intermediaries (cation-radicals) on the surface.
Collapse
Affiliation(s)
- Francisco Willian de S Lucas
- Departamento de Química Analítica e Físico-Química, Centro de Ciências, Universidade Federal do Ceará , Bloco 940 Campus do Pici, 60440-900, Fortaleza - CE Brazil
| | | | | | | | | | | | | | | |
Collapse
|
13
|
Method for equivalent circuit determination for electrochemical impedance spectroscopy data of protein adsorption on solid surfaces. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.02.046] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
14
|
Bali Prasad B, Jauhari D, Prasad Tiwari M. A dual-template imprinted polymer-modified carbon ceramic electrode for ultra trace simultaneous analysis of ascorbic acid and dopamine. Biosens Bioelectron 2013; 50:19-27. [DOI: 10.1016/j.bios.2013.05.062] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 05/30/2013] [Accepted: 05/31/2013] [Indexed: 11/16/2022]
|
15
|
Multiwalled carbon nanotubes-ceramic electrode modified with substrate-selective imprinted polymer for ultra-trace detection of bovine serum albumin. Biosens Bioelectron 2013; 39:236-43. [DOI: 10.1016/j.bios.2012.07.080] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 07/23/2012] [Accepted: 07/25/2012] [Indexed: 11/23/2022]
|
16
|
Bhavani Devi L, Berchmans S, Mandal AB. Highly sensitive detection of proteins using voltammetric assay in the presence of silver nanostructures. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2011.11.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
17
|
Lvovich V, Srikanthan S, Silverstein RL. A novel broadband impedance method for detection of cell-derived microparticles. Biosens Bioelectron 2010; 26:444-51. [PMID: 20729061 PMCID: PMC2946439 DOI: 10.1016/j.bios.2010.07.094] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2010] [Revised: 07/12/2010] [Accepted: 07/25/2010] [Indexed: 11/16/2022]
Abstract
A novel label-free method is presented to detect and quantify cell-derived microparticles (MPs) by the electrochemical potential-modulated electrochemical impedance spectroscopy (EIS). MPs are present in elevated concentrations during pathological conditions and play a major role in the establishment and pathogenesis of many diseases. Considering this, accurate detection and quantification of MPs is very important in clinical diagnostics and therapeutics. A combination of bulk solution electrokinetic sorting and interfacial impedance responses allows achieving detection limits as low as several MPs per μL. By fitting resulting EIS spectra with an equivalent electrical circuit, the bulk solution electrokinetic and interfacial impedance responses were characterized. In the bulk solution two major relaxations were prominent-β-relaxation in low MHz region due to the MP capacitive membrane bridging, and α-relaxation at ∼10 kHz due to counter ions diffusion. At low frequencies (10-0.1 Hz) at electrochemical potentials exceeding -100 mV, a facile interfacial Faradaic process of oxidation in MPs coupled with diffusion and non-Faradaic double layer charging dominate, probably due to oxidation of phospholipids and/or proteins on the MP surface and MP lysis. Buffer influence on the MP detection demonstrated that a relatively low conductivity Tyrode's buffer background solution is preferential for the MP electrokinetic separation and characterization. This study also demonstrated that standard laboratory methods such as flow cytometry underestimate MP concentrations, especially those with smaller average sizes, by as much as a factor of 2-40.
Collapse
Affiliation(s)
- Vadim Lvovich
- The Cleveland Clinic Foundation, Department of Biomedical Engineering/ND20, 9500 Euclid Ave., Cleveland, OH 44195, United States.
| | | | | |
Collapse
|
18
|
Goda T, Miyahara Y. Molecularly Engineered Charge-Conversion of Proteins for Sensitive Biosensing. Anal Chem 2010; 82:8946-53. [DOI: 10.1021/ac1018233] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Tatsuro Goda
- Biomaterials Center and International Center for Material and Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| | - Yuji Miyahara
- Biomaterials Center and International Center for Material and Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
| |
Collapse
|
19
|
Molecular imprinting polymer electrosensor based on gold nanoparticles for theophylline recognition and determination. Mikrochim Acta 2010. [DOI: 10.1007/s00604-010-0455-5] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
|
20
|
Ramanavicius A, Finkelsteinas A, Cesiulis H, Ramanaviciene A. Electrochemical impedance spectroscopy of polypyrrole based electrochemical immunosensor. Bioelectrochemistry 2010; 79:11-6. [DOI: 10.1016/j.bioelechem.2009.09.013] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2008] [Revised: 09/22/2009] [Accepted: 09/29/2009] [Indexed: 10/20/2022]
|
21
|
Valero Vidal C, Olmo Juan A, Igual Muñoz A. Adsorption of bovine serum albumin on CoCrMo surface: effect of temperature and protein concentration. Colloids Surf B Biointerfaces 2010; 80:1-11. [PMID: 20554436 DOI: 10.1016/j.colsurfb.2010.05.005] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2009] [Revised: 05/03/2010] [Accepted: 05/03/2010] [Indexed: 12/01/2022]
Abstract
The adsorption of bovine serum albumin (BSA) onto CoCrMo surface has been studied as a function of concentration of BSA and temperature by electrochemical techniques. The electrochemical impedance spectroscopy (EIS) technique was used to investigate the interfacial behaviour of BSA at open circuit potential (OCP). The charge transfer resistance was very sensitive to the amount of adsorbed protein, indicating that the adsorption process was accompanied by the transfer of charge and influenced the mechanism and kinetics of the corrosion reaction. At all the temperatures studied, adsorption of BSA onto the CoCrMo surface was successfully described with a Langmuir adsorption isotherm. EIS study was also carried out for determine the surface charge density, resulting from protein adsorption, and it was shown to be directly proportional to the amount of adsorbed protein (surface concentration). Thermodynamic data of adsorption was obtained for analyzing the adsorption of BSA onto CoCrMo surface. Gibbs free energy of adsorption, DeltaG(ADS) values, for BSA in the investigated temperature range (-51kJmol(-1)) showed that the molecules have a strong affinity for the CoCrMo surface. Enthalpy (DeltaH(ADS)) and entropy (DeltaS(ADS)) of adsorption suggested that the adsorption process of BSA onto the CoCrMo surface is an endothermic process and the molecule suffers structural changes when adsorbing on the metallic surface.
Collapse
Affiliation(s)
- C Valero Vidal
- Departamento de Ingeniería Química y Nuclear, E.T.S.I. Industriales, Universidad Politécnica de Valencia, P.O. Box 22012, E-46071 Valencia, Spain
| | | | | |
Collapse
|
22
|
Pinto EM, Soares DM, Brett CM. Interaction of BSA protein with copper evaluated by electrochemical impedance spectroscopy and quartz crystal microbalance. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2008.01.096] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
23
|
Kassanos P, Iles RK, Bayford RH, Demosthenous A. Towards the development of an electrochemical biosensor for hCGβ detection. Physiol Meas 2008; 29:S241-54. [DOI: 10.1088/0967-3334/29/6/s21] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
24
|
Wasowicz M, Viswanathan S, Dvornyk A, Grzelak K, Kłudkiewicz B, Radecka H. Comparison of electrochemical immunosensors based on gold nano materials and immunoblot techniques for detection of histidine-tagged proteins in culture medium. Biosens Bioelectron 2008; 24:284-9. [PMID: 18486465 DOI: 10.1016/j.bios.2008.04.002] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2008] [Revised: 03/21/2008] [Accepted: 04/01/2008] [Indexed: 11/27/2022]
Abstract
In this work, the direct electrochemical determination of poly-histidine tagged proteins using immunosensor based on anti-His (C-term) antibody immobilized on gold electrodes modified with 1,6-hexanedithiol, gold colloid particles or gold nanorods is described. The recombinant histidine-tagged silk proteinase inhibitor protein (rSPI2-His(6)) expressed in Pichia system selected as antigen for this immonosensor. An electrochemical impedance spectroscopy was used as label free detection technique for immune conjugation. The gold nanorods modified electrode layer showed better analytical response than gold nano particles. The linear calibration range was observed between 10 pg/ml and 1 ng/ml with limit of detection 5 pg/ml (S/N=3). Up to four successive assay cycles with retentive sensitivity were achieved for the immunosensors regenerated with 0.2M glycine-HCl buffer, pH 2.8. The performance of this immnosensor were compared with immuoblotting techniques.
Collapse
Affiliation(s)
- Michał Wasowicz
- Institute of Animal Reproduction and Food Research, Polish Academy of Sciences, Tuwima 10, 10-747 Olsztyn, Poland
| | | | | | | | | | | |
Collapse
|
25
|
Obuchowska A. Quantitation of bacteria through adsorption of intracellular biomolecules on carbon paste and screen-printed carbon electrodes and voltammetry of redox-active probes. Anal Bioanal Chem 2008; 390:1361-71. [DOI: 10.1007/s00216-007-1825-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2007] [Revised: 11/29/2007] [Accepted: 12/20/2007] [Indexed: 10/22/2022]
|
26
|
Paleček E, Ostatná V. Electroactivity of Nonconjugated Proteins and Peptides. Towards Electroanalysis of All Proteins. ELECTROANAL 2007. [DOI: 10.1002/elan.200704033] [Citation(s) in RCA: 87] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|