1
|
Li J, Li S, Zhao J, Huang Y, Zhao S. A G-quadruplex/hemin DNAzyme-based microchip electrophoresis chemiluminescence assay for highly sensitive detection of biotin in flour. Electrophoresis 2019; 40:2157-2164. [PMID: 31025386 DOI: 10.1002/elps.201800535] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 01/31/2019] [Accepted: 04/13/2019] [Indexed: 12/22/2022]
Abstract
Quantitative analysis of biotin in biological fluids, foods, and pharmaceutical is important for diagnosis and treatment of biotin-related diseases and health maintenance. In this work, a novel G-quadruplex/hemin DNAzyme-based microchip electrophoresis chemiluminescence (CL) assay method was established for rapid and highly sensitive detection of biotin. This method is based on the specific binding between biotin and streptavidin, the catalytic CL characteristics of G-quadruplex/hemin DNAzyme to the oxidation-reduction reaction of hydrogen peroxide with luminol, and the on-line separation function of microchip electrophoresis. Under the optimal experimental conditions, on-chip biotin analysis was achieved within 1 min. The CL intensity is linearly proportional to the concentration of biotin in the range of 13-630 nM with a detection limit of 6.4 nM. The proposed method has been applied for the detection of biotin in flour, biotin contents in three flour samples are found in the range of 199-223 ng/g with a mean value of 214 ng/g. The recoveries were in the range of 94-103%. With excellent sensitivity and good selectivity, the proposed method could be applied in a wide range of biological fluids, foods, and pharmaceutical analysis.
Collapse
Affiliation(s)
- Jian Li
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy, Guangxi Normal University, Guilin, P. R. China
| | - Shuting Li
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy, Guangxi Normal University, Guilin, P. R. China
| | - Jingjin Zhao
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy, Guangxi Normal University, Guilin, P. R. China
| | - Yong Huang
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy, Guangxi Normal University, Guilin, P. R. China
| | - Shulin Zhao
- State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources, College of Chemistry and Pharmacy, Guangxi Normal University, Guilin, P. R. China
| |
Collapse
|
2
|
Tonle IK, Ngameni E, Tchieno FMM, Walcarius A. Organoclay-modified electrodes: preparation, characterization and recent electroanalytical applications. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-014-2728-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
3
|
Surface exploration of a room-temperature ionic liquid-chitin composite film decorated with electrochemically deposited PdFeNi trimetallic alloy nanoparticles by pattern recognition: An elegant approach to developing a novel biotin biosensor. Talanta 2015; 131:249-58. [DOI: 10.1016/j.talanta.2014.07.040] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 07/12/2014] [Accepted: 07/15/2014] [Indexed: 01/05/2023]
|
4
|
Biscay J, González García MB, Costa García A. Electrochemical biotin detection based on magnetic beads and a new magnetic flow cell for screen printed electrode. Talanta 2014; 131:706-11. [PMID: 25281162 DOI: 10.1016/j.talanta.2014.08.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2014] [Revised: 08/03/2014] [Accepted: 08/05/2014] [Indexed: 12/16/2022]
Abstract
The use of the first flow-cell for magnetic assays with an integrated magnet is reported here. The flow injection analysis system (FIA) is used for biotin determination. The reaction scheme is based on a one step competitive assay between free biotin and biotin labeled with horseradish peroxidase (B-HRP). The mixture of magnetic beads modified with streptavidin (Strep-MB), biotin and B-HRP is left 15 min under stirring and then a washing step is performed. After that, 100 μL of the mixture is injected and after 30s 100 μL of 3,3',5,5'-Tetramethylbenzidine (TMB) is injected and the FIAgram is recorded applying a potential of -0.2V. The linear range obtained is from 0.01 to 1 nM of biotin and the sensitivity is 758 nA/nM. The modification and cleaning of the electrode are performed in an easy way due to the internal magnet of the flow cell.
Collapse
Affiliation(s)
- Julien Biscay
- Department of Physical and Analytical Chemistry, Faculty of Chemistry, University of Oviedo, 33006 Oviedo, Spain
| | - María Begoña González García
- Department of Physical and Analytical Chemistry, Faculty of Chemistry, University of Oviedo, 33006 Oviedo, Spain
| | - Agustín Costa García
- Department of Physical and Analytical Chemistry, Faculty of Chemistry, University of Oviedo, 33006 Oviedo, Spain.
| |
Collapse
|
5
|
|
6
|
A small-molecule-linked DNA–graphene oxide-based fluorescence-sensing system for detection of biotin. Anal Biochem 2013; 442:172-7. [DOI: 10.1016/j.ab.2013.07.036] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2013] [Revised: 07/14/2013] [Accepted: 07/26/2013] [Indexed: 12/19/2022]
|
7
|
Magliulo M, Mallardi A, Gristina R, Ridi F, Sabbatini L, Cioffi N, Palazzo G, Torsi L. Part per Trillion Label-Free Electronic Bioanalytical Detection. Anal Chem 2013; 85:3849-57. [DOI: 10.1021/ac302702n] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Maria Magliulo
- Dipartimento
di Chimica, Università degli Studi di Bari “A. Moro” - Via Orabona, 4 70126
Bari, Italy
| | - Antonia Mallardi
- CNR-IPCF, Istituto per i Processi Chimico-Fisici - Via Orabona, 4 70126
Bari, Italy
| | - Roberto Gristina
- CNR-IMIP, Istituto di Metodologie Inorganiche e dei Plasmi - Via Orabona,
4 70126 Bari, Italy
| | - Francesca Ridi
- Dipartimento
di Chimica − Università degli Studi di Firenze − via della Lastruccia, 3 50019
Sesto Fiorentino, Italy
- CSGI − Università degli Studi di Firenze − via della Lastruccia,
3 50019 Sesto Fiorentino, Italy
| | - Luigia Sabbatini
- Dipartimento
di Chimica, Università degli Studi di Bari “A. Moro” - Via Orabona, 4 70126
Bari, Italy
| | - Nicola Cioffi
- Dipartimento
di Chimica, Università degli Studi di Bari “A. Moro” - Via Orabona, 4 70126
Bari, Italy
| | - Gerardo Palazzo
- Dipartimento
di Chimica, Università degli Studi di Bari “A. Moro” - Via Orabona, 4 70126
Bari, Italy
- CSGI − Università degli Studi di Firenze − via della Lastruccia,
3 50019 Sesto Fiorentino, Italy
| | - Luisa Torsi
- Dipartimento
di Chimica, Università degli Studi di Bari “A. Moro” - Via Orabona, 4 70126
Bari, Italy
| |
Collapse
|
8
|
Somji M, Dounin V, Muench SB, Schulze H, Bachmann TT, Kerman K. Electroanalysis of amino acid substitutions in bioengineered acetylcholinesterase. Bioelectrochemistry 2012; 88:110-3. [DOI: 10.1016/j.bioelechem.2012.07.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2012] [Revised: 07/01/2012] [Accepted: 07/13/2012] [Indexed: 10/28/2022]
|
9
|
Krejcova L, Dospivova D, Ryvolova M, Kopel P, Hynek D, Krizkova S, Hubalek J, Adam V, Kizek R. Paramagnetic particles coupled with an automated flow injection analysis as a tool for influenza viral protein detection. Electrophoresis 2012; 33:3195-204. [PMID: 22949282 DOI: 10.1002/elps.201200304] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2012] [Revised: 07/02/2012] [Accepted: 07/03/2012] [Indexed: 11/09/2022]
Abstract
Currently, the influenza virus infects millions of individuals every year. Since the influenza virus represents one of the greatest threats, it is necessary to develop a diagnostic technique that can quickly, inexpensively, and accurately detect the virus to effectively treat and control seasonal and pandemic strains. This study presents an alternative to current detection methods. The flow-injection analysis-based biosensor, which can rapidly and economically analyze a wide panel of influenza virus strains by using paramagnetic particles modified with glycan, can selectively bind to specific viral A/H5N1/Vietnam/1203/2004 protein-labeled quantum dots. Optimized detection of cadmium sulfide quantum dots (CdS QDs)-protein complexes connected to paramagnetic microbeads was performed using differential pulse voltammetry on the surface of a hanging mercury drop electrode (HMDE) and/or glassy carbon electrode (GCE). Detection limit (3 S/N) estimations based on cadmium(II) ions quantification were 0.1 μg/mL or 10 μg/mL viral protein at HMDE or GCE, respectively. Viral protein detection was directly determined using differential pulse voltammetry Brdicka reaction. The limit detection (3 S/N) of viral protein was estimated as 0.1 μg/mL. Streptavidin-modified paramagnetic particles were mixed with biotinylated selective glycan to modify their surfaces. Under optimized conditions (250 μg/mL of glycan, 30-min long interaction with viral protein, 25°C and 400 rpm), the viral protein labeled with quantum dots was selectively isolated and its cadmium(II) content was determined. Cadmium was present in detectable amounts of 10 ng per mg of protein. Using this method, submicrogram concentrations of viral proteins can be identified.
Collapse
Affiliation(s)
- Ludmila Krejcova
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Czech Republic, European Union
| | | | | | | | | | | | | | | | | |
Collapse
|
10
|
Kergaravat SV, Gómez GA, Fabiano SN, Laube Chávez TI, Pividori MI, Hernández SR. Biotin determination in food supplements by an electrochemical magneto biosensor. Talanta 2012; 97:484-90. [DOI: 10.1016/j.talanta.2012.05.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2011] [Revised: 04/09/2012] [Accepted: 05/06/2012] [Indexed: 01/02/2023]
|
11
|
Interfacial electronic effects in functional biolayers integrated into organic field-effect transistors. Proc Natl Acad Sci U S A 2012; 109:6429-34. [PMID: 22493224 DOI: 10.1073/pnas.1200549109] [Citation(s) in RCA: 102] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Biosystems integration into an organic field-effect transistor (OFET) structure is achieved by spin coating phospholipid or protein layers between the gate dielectric and the organic semiconductor. An architecture directly interfacing supported biological layers to the OFET channel is proposed and, strikingly, both the electronic properties and the biointerlayer functionality are fully retained. The platform bench tests involved OFETs integrating phospholipids and bacteriorhodopsin exposed to 1-5% anesthetic doses that reveal drug-induced changes in the lipid membrane. This result challenges the current anesthetic action model relying on the so far provided evidence that doses much higher than clinically relevant ones (2.4%) do not alter lipid bilayers' structure significantly. Furthermore, a streptavidin embedding OFET shows label-free biotin electronic detection at 10 parts-per-trillion concentration level, reaching state-of-the-art fluorescent assay performances. These examples show how the proposed bioelectronic platform, besides resulting in extremely performing biosensors, can open insights into biologically relevant phenomena involving membrane weak interfacial modifications.
Collapse
|
12
|
References. Anal Chem 2012. [DOI: 10.1201/b11478-14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
13
|
Prasek J, Huska D, Jasek O, Zajickova L, Trnkova L, Adam V, Kizek R, Hubalek J. Carbon composite micro- and nano-tubes-based electrodes for detection of nucleic acids. NANOSCALE RESEARCH LETTERS 2011; 6:385. [PMID: 21711910 PMCID: PMC3211478 DOI: 10.1186/1556-276x-6-385] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Accepted: 05/16/2011] [Indexed: 05/31/2023]
Abstract
The first aim of this study was to fabricate vertically aligned multiwalled carbon nanotubes (MWCNTs). MWCNTs were successfully prepared by using plasma enhanced chemical vapour deposition. Further, three carbon composite electrodes with different content of carbon particles with various shapes and sizes were prepared and tested on measuring of nucleic acids. The dependences of adenine peak height on the concentration of nucleic acid sample were measured. Carbon composite electrode prepared from a mixture of glassy and spherical carbon powder and MWCNTs had the highest sensitivity to nucleic acids. Other interesting result is the fact that we were able to distinguish signals for all bases using this electrode.
Collapse
Affiliation(s)
- Jan Prasek
- Department of Microelectronics, Brno University of Technology, Technicka 10, CZ-61600 Brno, Czech Republic
| | - Dalibor Huska
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-61300 Brno, Czech Republic
| | - Ondrej Jasek
- Department of Physical Electronics, Masaryk University, Kotlarska 2, CZ-61137 Brno, Czech Republic
| | - Lenka Zajickova
- Department of Physical Electronics, Masaryk University, Kotlarska 2, CZ-61137 Brno, Czech Republic
| | - Libuse Trnkova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-61300 Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-61300 Brno, Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, CZ-61300 Brno, Czech Republic
| | - Jaromir Hubalek
- Department of Microelectronics, Brno University of Technology, Technicka 10, CZ-61600 Brno, Czech Republic
| |
Collapse
|
14
|
Immobilization of metallothionein to carbon paste electrode surface via anti-MT antibodies and its use for biosensing of silver. Biosens Bioelectron 2011; 26:2201-7. [DOI: 10.1016/j.bios.2010.09.035] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Revised: 09/15/2010] [Accepted: 09/18/2010] [Indexed: 11/19/2022]
|
15
|
Shedge HY, Creager SE. Evaluation of non-specific binding suppression schemes for neutravidin and alkaline phosphatase at the surface of reticulated vitreous carbon electrodes. Anal Chim Acta 2010; 657:154-62. [PMID: 20005327 DOI: 10.1016/j.aca.2009.10.044] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2009] [Accepted: 10/19/2009] [Indexed: 10/20/2022]
Abstract
Non-specific binding (NSB) of high-molecular-weight proteins onto electrode surfaces can complicate the application of electroanalytical techniques to clinical and environmental research, particularly in biosensor applications. We present herein various strategies to modify the surface of reticulated vitreous carbon (RVC) electrodes to suppress non-specific binding of biomolecules onto its surface. Non-specific binding and specific binding (SB) of two enzyme conjugates, neutravidin-alkaline phosphatase (NA-ALP) and biotinylated alkaline phosphatase (B-ALP), and also neutravidin itself, were studied using hydroquinone diphosphate (HQDP) as an enzyme substrate for ALP inside the pores of RVC electrodes that had been subjected to various modification schemes. The extent of NSB and SB of these biomolecules inside RVC pores was assessed by measuring the initial rate of generation of an electroactive product, hydroquinone (HQ), of the enzyme-catalyzed reaction, using linear scan voltammetry (LSV) for HQ detection. Electrodes functionalized with phenylacetic acid and poly(ethylene glycol) (PEG) showed low NSB and high SB (when biotin capture ligands were included in the modification scheme) in comparison with unmodified electrodes and RVC electrodes modified in other ways. A simple sandwich bioassay for neutravidin was performed on the RVC electrode with the lowest NSB. A concentration detection limit of 52+/-2 ng mL(-1) and an absolute detection limit of 5.2+/-0.2 ng were achieved for neutravidin when this assay was performed using a 100 microL sample size.
Collapse
Affiliation(s)
- Hemangi Y Shedge
- Hunter Laboratory, Department of Chemistry, Clemson University, Clemson, SC 29634, USA
| | | |
Collapse
|
16
|
Krizkova S, Krystofova O, Trnkova L, Hubalek J, Adam V, Beklova M, Horna A, Havel L, Kizek R. Silver(I) ions ultrasensitive detection at carbon electrodes-analysis of waters, tobacco cells and fish tissues. SENSORS 2009; 9:6934-50. [PMID: 22399980 PMCID: PMC3290483 DOI: 10.3390/s90906934] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Revised: 08/12/2009] [Accepted: 08/24/2009] [Indexed: 11/22/2022]
Abstract
We used carbon paste electrodes and a standard potentiostat to detect silver ions. The detection limit (3 Signal/Noise ratio) was estimated as 0.5 μM. A standard electrochemical instrument microanalysis of silver(I) ions was suggested. As a working electrode a carbon tip (1 mL) or carbon pencil was used. Limits of detection estimated by dilution of a standard were 1 (carbon tip) or 10 nM (carbon pencil). Further we employed flow injection analysis coupled with carbon tip to detect silver(I) ions released in various beverages and mineral waters. During first, second and third week the amount of silver(I) ions releasing into water samples was under the detection limit of the technique used for their quantification. At the end of a thirteen weeks long experiment the content of silver(I) ions was several times higher compared to the beginning of release detected in the third week and was on the order of tens of nanomoles. In subsequent experiments the influence of silver(I) ions (0, 5 and 10 μM) on a plant model system (tobacco BY-2 cells) during a four-day exposition was investigated. Silver(I) ions were highly toxic to the cells, which was revealed by a double staining viability assay. Moreover we investigated the effect of silver(I) ions (0, 0.3, 0.6, 1.2 and 2.5 μM) on guppies (Poecilia reticulata). Content of Ag(I) increased with increasing time of the treatment and applied concentrations in fish tissues. It can be concluded that a carbon tip or carbon pencil coupled with a miniaturized potentiostat can be used for detection of silver(I) ions in environmental samples and thus represents a small, portable, low cost and easy-to-use instrument for such purposes.
Collapse
Affiliation(s)
- Sona Krizkova
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Olga Krystofova
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Libuse Trnkova
- Department Chemistry, Faculty of Science, Masaryk University, Kotlarska 2, CZ-611 37 Brno, Czech Republic
- Research Centre for Environmental Chemistry and Ecotoxicology, Faculty of Science, Masaryk University, Kotlarska 2, CZ-611 37 Brno, Czech Republic
| | - Jaromir Hubalek
- Department of Microelectronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Udolni 53, CZ-602 00 Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
- Department of Animal Nutrition and Forage Production, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Miroslava Beklova
- Department of Veterinary Ecology and Environmental Protection, Faculty of Veterinary Hygiene and Ecology, University of Veterinary and Pharmaceutical Sciences, Palackeho 1-3, CZ-612 42 Brno, Czech Republic
| | - Ales Horna
- Tomas Bata University, T.G. Masaryka 275, CZ-762 72 Zlin, Czech Republic
| | - Ladislav Havel
- Department of Plant Biology Faculty of Agronomy, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
- Author to whom correspondence should be addressed; E-Mail:
| |
Collapse
|
17
|
Zima J, Švancara I, Barek J, Vytřas K. Recent Advances in Electroanalysis of Organic Compounds at Carbon Paste Electrodes. Crit Rev Anal Chem 2009. [DOI: 10.1080/10408340903011853] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
18
|
Santa María D, Claramunt RM, Herranz F, Alkorta I, Elguero J. A theoretical and experimental NMR study of (+)-biotin methyl ester. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2008.11.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
19
|
Švancara I, Vytřas K, Kalcher K, Walcarius A, Wang J. Carbon Paste Electrodes in Facts, Numbers, and Notes: A Review on the Occasion of the 50-Years Jubilee of Carbon Paste in Electrochemistry and Electroanalysis. ELECTROANAL 2009. [DOI: 10.1002/elan.200804340] [Citation(s) in RCA: 489] [Impact Index Per Article: 32.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
|
20
|
Amperometric Sensor for Detection of Chloride Ions. SENSORS 2008; 8:5619-5636. [PMID: 27873832 PMCID: PMC3705522 DOI: 10.3390/s8095619] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2008] [Revised: 09/09/2008] [Accepted: 09/11/2008] [Indexed: 11/16/2022]
Abstract
Chloride ion sensing is important in many fields such as clinical diagnosis, environmental monitoring and industrial applications. We have measured chloride ions at a carbon paste electrode (CPE) and at a CPE modified with solid AgNO3, a solution of AgNO3 and/or solid silver particles. Detection limits (3 S/N) for chloride ions were 100 μM, 100 μM and 10 μM for solid AgNO3, solution of AgNO3 and/or solid silver particles, respectively. The CPE modified with silver particles is the most sensitive to the presence chloride ions. After that we approached to the miniaturization of the whole electrochemical instrument. Measurements were carried out on miniaturized instrument consisting of a potentiostat with dimensions 35 × 166 × 125 mm, screen printed electrodes, a peristaltic pump and a PC with control software. Under the most suitable experimental conditions (Britton-Robinson buffer, pH 1.8 and working electrode potential 550 mV) we estimated the limit of detection (3 S/N) as 500 nM.
Collapse
|
21
|
Diopan V, Babula P, Shestivska V, Adam V, Zemlicka M, Dvorska M, Hubalek J, Trnkova L, Havel L, Kizek R. Electrochemical and spectrometric study of antioxidant activity of pomiferin, isopomiferin, osajin and catalposide. J Pharm Biomed Anal 2008; 48:127-33. [DOI: 10.1016/j.jpba.2008.05.025] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Revised: 04/10/2008] [Accepted: 05/14/2008] [Indexed: 11/16/2022]
|
22
|
Mikelova R, Prokop Z, Stejskal K, Adam V, Beklova M, Trnkova L, Kulichova B, Horna A, Chaloupkova R, Damborsky J, Kizek R. Enzymatic Reaction Coupled with Flow-Injection Analysis with Charged Aerosol, Coulometric, or Amperometric Detection for Estimation of Contamination of the Environment by Pesticides. Chromatographia 2008. [DOI: 10.1365/s10337-008-0590-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
23
|
Krizkova S, Hrdinova V, Adam V, Burgess EPJ, Kramer KJ, Masarik M, Kizek R. Chip-Based CE for Avidin Determination in Transgenic Tobacco and Its Comparison with Square-Wave Voltammetry and Standard Gel Electrophoresis. Chromatographia 2008. [DOI: 10.1365/s10337-008-0606-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
24
|
Adam V, Baloun J, Fabrik I, Trnkova L, Kizek R. An Electrochemical Detection of Metallothioneins at the Zeptomole Level in Nanolitre Volumes. SENSORS 2008; 8:2293-2305. [PMID: 27879822 PMCID: PMC3673418 DOI: 10.3390/s8042293] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2008] [Accepted: 03/26/2008] [Indexed: 11/16/2022]
Abstract
An Electrochemical Detection of Metallothioneins at the Zeptomole Level in Nanolitre VolumesWe report on improvement of the adsorptive transfer stripping technique (AdTS) coupled with the differential pulse voltammetry Brdicka reaction to determine a thiol-protein. The current technique has been unable to generate reproducible results when analyzing very low sample volumes (nanolitres). This obstacle can be overcome technically by modifying the current transfer technique including cooling step of the adsorbed analyte. We tested the technique on determination of a promising tumour disease marker protein called metallothionein (MT). The detection limit (3 S/N) of MT was evaluated as 500 zeptomoles per 500 nL (1 pM) and the quantification limit (10 S/N) as 1,500 zeptomoles per 500 nL (3 pM). Further, the improved AdTS technique was utilized to analyze blood serum samples from patients with breast cancer. Based on the results obtained it can be concluded that the improved technique can be used to detect a thiolprotein in very low sample volumes and can also prevent interferences during the washing and transferring step.
Collapse
Affiliation(s)
- Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic; E-mail:
- Department of Animal Nutrition and Forage Production, Faculty of Agronomy, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Jiri Baloun
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic; E-mail:
| | - Ivo Fabrik
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic; E-mail:
- Department of Biochemistry, Masaryk University, Kotlarska 2, CZ-611 37 Brno, Czech Republic
| | - Libuse Trnkova
- Department of Chemistry, Faculty of Science, Masaryk University, Kotlarska 2, CZ-611 37 Brno, Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic; E-mail:
- Author to whom correspondence should be addressed; E-mail:
| |
Collapse
|
25
|
Adam V, Zitka O, Dolezal P, Zeman L, Horna A, Hubalek J, Sileny J, Krizkova S, Trnkova L, Kizek R. Lactoferrin Isolation Using Monolithic Column Coupled with Spectrometric or Micro-Amperometric Detector. SENSORS 2008; 8:464-487. [PMID: 27879717 PMCID: PMC3681142 DOI: 10.3390/s8010464] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2007] [Accepted: 01/15/2008] [Indexed: 01/14/2023]
Abstract
Lactoferrin is a multifunctional protein with antimicrobial activity and others tohealth beneficial properties. The main aim of this work was to propose easy to usetechnique for lactoferrin isolation from cow colostrum samples. Primarily we utilizedsodium dodecyl sulphate - polyacrylamide gel electrophoresis for isolation of lactoferrinfrom the real samples. Moreover we tested automated microfluidic Experionelectrophoresis system to isolate lactoferrin from the collostrum sample. The welldeveloped signal of lactoferrin was determined with detection limit (3 S/N) of 20 ng/ml. Inspite of the fact that Experion is faster than SDS-PAGE both separation techniques cannotbe used in routine analysis. Therefore we have tested third separation technique, ionexchange chromatography, using monolithic column coupled with UV-VIS detector (LCUV-VIS). We optimized wave length (280 nm), ionic strength of the elution solution (1.5M NaCl) and flow rate of the retention and elution solutions (0.25 ml/min and 0.75 ml/min.respectively). Under the optimal conditions the detection limit was estimated as 0.1 μg/mlof lactoferrin measured. Using LC-UV-VIS we determined that lactoferrin concentrationvaried from 0.5 g/l to 1.1 g/l in cow colostrums collected in the certain time interval up to 72 hours after birth. Further we focused on miniaturization of detection device. We testedamperometric detection at carbon electrode. The results encouraged us to attempt tominiaturise whole detection system and to test it on analysis of real samples of humanfaeces, because lactoferrin level in faeces is closely associated with the inflammations ofintestine mucous membrane. For the purpose of miniaturization we employed thetechnology of printed electrodes. The detection limit of lactoferrin was estimated as 10μg/ml measured by the screen-printed electrodes fabricated by us. The fabricatedelectrodes were compared with commercially available ones. It follows from the obtainedresults that the responses measured by commercial electrodes are app. ten times highercompared with those measured by the electrodes fabricated by us. This phenomenonrelates with smaller working electrode surface area of the electrodes fabricated by us(about 50 %) compared to the commercial ones. The screen-printed electrodes fabricatedby us were utilized for determination of lactoferrin faeces. Regarding to fact that sample offaeces was obtained from young and healthy man the amount of lactoferrin in sample wasunder the limit of detection of this method.
Collapse
Affiliation(s)
- Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Ondrej Zitka
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Petr Dolezal
- Department of Animal Nutrition and Forage Production Faculty of Agronomy, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Ladislav Zeman
- Department of Animal Nutrition and Forage Production Faculty of Agronomy, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Ales Horna
- Department of Food Engineering, Faculty of Technology, Tomas Bata University, T.G. Masaryka 275, CZ-762 72 Zlin, Czech Republic
| | - Jaromir Hubalek
- Department of Microelectronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Udolni 53, CZ-602 00 Brno, Czech Republic
| | - Jan Sileny
- Department of Microelectronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Udolni 53, CZ-602 00 Brno, Czech Republic
| | - Sona Krizkova
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Libuse Trnkova
- Department Chemistry, Faculty of Science, Masaryk University, Kotlarska 2, CZ-611 37 Brno, Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
| |
Collapse
|
26
|
Zerzaňová A, Žižkovský V, Kučera R, Klimeš J, Jesenský I, Dohnal J, Barrón D. Using of HPLC coupled with coulometric detector for the determination of biotin in pharmaceuticals. J Pharm Biomed Anal 2007; 45:730-5. [DOI: 10.1016/j.jpba.2007.08.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2007] [Revised: 08/08/2007] [Accepted: 08/09/2007] [Indexed: 11/29/2022]
|
27
|
Utilizing of Square Wave Voltammetry to Detect Flavonoids in the Presence of Human Urine. SENSORS 2007; 7:2402-2418. [PMID: 28903234 PMCID: PMC3864529 DOI: 10.3390/s7102402] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2007] [Accepted: 10/17/2007] [Indexed: 11/17/2022]
Abstract
About biological affecting of flavonoids on animal organisms is known less, thus we selected flavonoids, flavanones and flavones, and their glycosides, which were examined as potential inducers of cytochrome(s) P450 when administrated by gavages into experimental male rats. The study was focused on induction of CYP1A1, the major cytochrome P450 involved in carcinogen activation. The data obtained demonstrate the necessity of taking into account not only ability of flavonoids to bind to Ah receptor (induction factor) but also to concentrate on their distribution and metabolism (including colon microflora) in the body. After that we examined certain flavonoids as potential inducers of cytochrome P450, we wanted to suggest and optimize suitable electrochemical technique for determination of selected flavonoids (quercetin, quercitrin, rutin, chrysin and diosmin) in body liquids. For these purposes, we selected square wave voltannetry using carbon paste electrode. Primarily we aimed on investigation of their basic electrochemical behaviour. After that we have optimized frequency, step potential and supporting electrolyte. Based on the results obtained, we selected the most suitable conditions for determination of the flavonoids as follows: frequency 180 Hz, step potential 1.95 mV/s and phosphate buffer of pH 7 as supporting electrolyte. Detection limits (3 S/N) of the flavonoids were from units to tens of nM except diosmin, where the limit were higher than μM. In addition, we attempted to suggest a sensor for analysis of flavonoids in urine. It clearly follows from the results obtained that flavonoids can be analysed in the presence of animal urine, because urine did not influence much the signals of flavonoids (recoveries of the signals were about 90 %).
Collapse
|
28
|
An Investigation of Glutathione-Platinum(II) Interactions by Means of the Flow Injection Analysis Using Glassy Carbon Electrode. SENSORS 2007. [DOI: 10.3390/s7071256] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
29
|
Hazards of Secondary Bromadiolone Intoxications Evaluated using High-performance Liquid Chromatography with Electrochemical Detection. SENSORS 2007. [DOI: 10.3390/s7071271] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
30
|
Spectrometric and Voltammetric Analysis of Urease – Nickel Nanoelectrode as an Electrochemical Sensor. SENSORS 2007. [DOI: 10.3390/s7071238] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
31
|
Petrlova J, Masarik M, Potesil D, Adam V, Trnkova L, Kizek R. Zeptomole Detection of Streptavidin Using Carbon Paste Electrode and Square-Wave Voltammetry. ELECTROANAL 2007. [DOI: 10.1002/elan.200603837] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
32
|
Mikelova R, Baloun J, Petrlova J, Adam V, Havel L, Petrek J, Horna A, Kizek R. Electrochemical determination of Ag-ions in environment waters and their action on plant embryos. Bioelectrochemistry 2006; 70:508-18. [PMID: 17251068 DOI: 10.1016/j.bioelechem.2006.12.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2006] [Revised: 11/11/2006] [Accepted: 12/11/2006] [Indexed: 02/07/2023]
Abstract
We utilized liquid chromatography coupled with electrochemical detector (HPLC-ED) for analyzing of silver ions. The optimization of basic chromatographic parameters has been done. The detection limit (3 S/N) obtained were 20 nmol/dm(3). Influence of different interferences (anions and cations) on current response of silver ions has been described. Moreover, we used HPLC-ED to analyze waters of different purity including photographic emulsion, which naturally contained silver ions. We found out that content of silver ions in the emulsion was 1.57 x 0.03 mmol/dm(3). Moreover, we investigated influence of silver ions on early somatic embryos of Blue Spruce. We were interested in the issue how much silver ions can embryos uptake during four days long treatment. For this purpose, we used optimized HPLC-ED technique. The content increased with increasing treatment time and applied concentration. We also studied how silver ions can influence thiols content in the treated embryos. For these purposes we used adsorptive transfer stripping voltammetry in connection with differential pulse voltammetry--Brdicka reaction. It clearly follows from the obtained results that content of thiols increased with increasing treatment time and applied concentration.
Collapse
Affiliation(s)
- Radka Mikelova
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | | | | | | | | | | | | | | |
Collapse
|
33
|
|
34
|
Flow Injection Analysis Coupled with Carbon Electrodes as the Tool for Analysis of Naphthoquinones with Respect to Their Content and Functions in Biological Samples. SENSORS 2006. [DOI: 10.3390/s6111466] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
35
|
Petrlova J, Mikelova R, Stejskal K, Kleckerova A, Zitka O, Petrek J, Havel L, Zehnalek J, Vojtech A, Trnkova L, Kizek R. Simultaneous determination of eight biologically active thiol compounds using gradient elution-liquid chromatography with Coul-Array detection. J Sep Sci 2006; 29:1166-73. [PMID: 16830732 DOI: 10.1002/jssc.200500425] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The most active form of sulfur in biomolecules is the thiol group, present in a number of biologically active compounds. Here we present a comprehensive study of thiol analysis using flow injection analysis/HPLC with electrochemical detection. The effect of different potentials of working electrodes, of organic solvent contents in the mobile phase, and of isocratic and gradient elution on simultaneous determination of thiol compounds (cysteine, cystine, N-acetylcysteine, homocysteine, reduced and oxidised glutathione, desglycinephytochelatin, and phytochelatins) are described and discussed. These thiol compounds were well separated and detected under optimised HPLC-electrochemical detection conditions (mobile phase: 80 mM trifluoroacetic acid and methanol with a gradient profile starting at 97:3 (TFA:methanol), kept constant for the first 8 min, then decreasing to 85:15 during one minute, kept constant for 8 min, and finally increasing linearly up to 97:3 from 17 to 18 min; the flow rate was 0.8 mL/min, column and detector temperature 25 degrees C, and the electrode potential 900 mV). We were able to determine tens of femtomoles (3 S/N) of the thiols per injection (5 microL), except for phytochelatin5 whose detection limit was 2.1 pmole. This technique was consequently used for simultaneous determination of compounds of interest in biological samples (maize tissue and human blood serum).
Collapse
Affiliation(s)
- Jitka Petrlova
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Brno, Czech Republic
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Potesil D, Mikelova R, Adam V, Kizek R, Prusa R. Change of the Protein p53 Electrochemical Signal According to its Structural Form – Quick and Sensitive Distinguishing of Native, Denatured, and Aggregated Form of the “Guardian of the Genome”. Protein J 2006; 25:23-32. [PMID: 16721658 DOI: 10.1007/s10930-006-0014-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Presence of mutated and/or structurally modified (e.g., denatured, aggregated) protein p53 form is associated with several disorders such as Alzheimer's disease, Parkinson's disease, prion diseases, and many types of tumours. The aim of this work was to distinguish native, denatured and aggregated form of full-length p53 by flow injection analysis coupled with electrochemical detector (FIA-ED). Firstly FIA-ED method used for protein native form determination was optimized (detection limit 45.8 amol per 5 mul injection; 3 x S/N). In addition the technique was applied to identify p53 structural forms (denatured and aggregated). It was found out that denatured form provides about three times higher electrochemical response (protein structure unfolding, approach of more electroactive centers - aminoacid residues - towards electrode surface) in comparison with native form. On the other hand, aggregated form offers lower response (steric eclipse of electroactive protein parts) when compared with the signal of native form. The obtained data show that we are not only able to sensitively determine native, denatured, and aggregated structural forms of p53 protein but also to distinguish them.
Collapse
Affiliation(s)
- David Potesil
- Department of Analytical Chemistry, Faculty of Science, Masaryk University, Kotlarska 2, 611 37, Brno, Czech Republic
| | | | | | | | | |
Collapse
|
37
|
Petrek J, Vítecek J, Vlasínová H, Kizek R, Kramer KJ, Adam V, Klejdus B, Havel L. Application of computer imaging, stripping voltammetry and mass spectrometry to study the effect of lead (Pb-EDTA) on the growth and viability of early somatic embryos of Norway spruce (Picea abies /L./ Karst.). Anal Bioanal Chem 2005; 383:576-86. [PMID: 16220262 DOI: 10.1007/s00216-005-0028-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2005] [Revised: 07/08/2005] [Accepted: 07/13/2005] [Indexed: 11/27/2022]
Abstract
Image analysis (IA) was used to determine the areas and circumferences of clusters of early somatic embryos (ESEs) of the Norway spruce (Picea abies /L./Karst.). Results obtained from IA were compared with the fresh weights of the ESE clusters and their esterase activities. The areas of the ESE clusters correlated well with both the increases in fresh weight (R2=0.99) of the ESEs and their esterase activities (R2=0.99). In addition, we studied the viability of the ESEs, which was determined by (a) double staining with fluorescein diacetate and propidium iodide (the resulting fluorescence was quantified by IA) and (b) determining esterase activity using a spectrofluorimetric detector. The results obtained with IA and esterase assay were comparable (the deviation between the tangents of the bisectors was 6.4%). IA was also used to study the effect of Pb-EDTA chelate (50, 250 and 500 microM) on the viability of the ESEs and on the growth of clusters. The presence of Pb-EDTA markedly slowed the growth of ESEs clusters (by more than 65% with 250 microM of Pb-EDTA after 288 h of cultivation) and decreased the viability of ESEs (by more than 30% with 500 microM of Pb-EDTA after 288 h of cultivation). The lead concentration in the ESEs was determined by differential pulse anodic stripping voltammetry and increased with the external lead concentration and the time of treatment from 100 to 600 pg Pb/100 mg of fresh weight of ESEs. Glutathione is a diagnostic marker of the influence of Pb-EDTA on ESEs and its content was determined by high-performance liquid chromatography coupled with mass spectrometry. The glutathione content changed linearly with treatment time and the applied external lead concentration. The highest glutathione content was obtained at 250 microM of Pb-EDTA after 192 h of cultivation.
Collapse
Affiliation(s)
- Jirí Petrek
- Department of Botany and Plant Physiology, Mendel University of Agriculture and Forestry, Zemedelská 1, 613 00, Brno, Czech Republic
| | | | | | | | | | | | | | | |
Collapse
|