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Tonello S, Stradolini F, Abate G, Uberti D, Serpelloni M, Carrara S, Sardini E. Electrochemical detection of different p53 conformations by using nanostructured surfaces. Sci Rep 2019; 9:17347. [PMID: 31758050 PMCID: PMC6874615 DOI: 10.1038/s41598-019-53994-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 11/07/2019] [Indexed: 11/09/2022] Open
Abstract
Protein electrochemistry represents a powerful technique for investigating the function and structure of proteins. Currently available biochemical assays provide limited information related to the conformational state of proteins and high costs. This work provides novel insights into the electrochemical investigation of the metalloprotein p53 and its redox products using label-free direct electrochemistry and label-based antibody-specific approaches. First, the redox activities of different p53 redox products were qualitatively investigated on carbon-based electrodes. Then, focusing on the open p53 isoform (denatured p53), a quantitative analysis was performed, comparing the performances of different bulk and nanostructured materials (carbon and platinum). Overall, four different p53 products could be successfully discriminated, from wild type to denatured. Label-free analysis suggested a single electron exchange with electron transfer rate constants on the order of 1 s-1. Label-based analysis showed decreasing affinity of pAb240 towards denatured, oxidized and nitrated p53. Furthermore, platinum nanostructured electrodes showed the highest enhancement of the limit of detection in the quantitative analysis (100 ng/ml). Overall, the obtained results represent a first step towards the implementation of highly requested complex integrated devices for clinical practices, with the aim to go beyond simple protein quantification.
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Affiliation(s)
- Sarah Tonello
- Department of Information Engineering, University of Brescia, Brescia, Italy.
| | | | - Giulia Abate
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Daniela Uberti
- Department of Molecular and Translational Medicine, University of Brescia, Brescia, Italy
| | - Mauro Serpelloni
- Department of Information Engineering, University of Brescia, Brescia, Italy
| | - Sandro Carrara
- Integrated Systems Laboratory (LSI), EPFL, Lausanne, Switzerland
| | - Emilio Sardini
- Department of Information Engineering, University of Brescia, Brescia, Italy
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2
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Electrochemical and optical study of metallothionein interactions with prion proteins. J Pharm Biomed Anal 2017; 140:355-361. [DOI: 10.1016/j.jpba.2017.03.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Revised: 03/13/2017] [Accepted: 03/20/2017] [Indexed: 01/23/2023]
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3
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Feng R, Hu X, He C, Li X, Luo X. Electrochemical Determination of the p53 Tumor Suppressor Gene Using a Gold Nanoparticle-Graphene Nanocomposite Modified Glassy Carbon Electrode. ANAL LETT 2017. [DOI: 10.1080/00032719.2016.1178273] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Rongrong Feng
- School of Chemistry and Chemical Engineering, Yan’an University, Yan’an, China
| | - Xiaoqin Hu
- School of Chemistry and Chemical Engineering, Yan’an University, Yan’an, China
| | - Caimei He
- School of Chemistry and Chemical Engineering, Yan’an University, Yan’an, China
| | - Xiaoxia Li
- School of Chemistry and Chemical Engineering, Yan’an University, Yan’an, China
| | - Xianwen Luo
- School of Chemistry and Chemical Engineering, Yan’an University, Yan’an, China
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Vasilescu A, Gaspar S, Mihai I, Tache A, Litescu SC. Development of a label-free aptasensor for monitoring the self-association of lysozyme. Analyst 2013; 138:3530-7. [PMID: 23666516 DOI: 10.1039/c3an00229b] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A novel aptamer and surface plasmon resonance (SPR)-based sensor was developed for the label-free detection of lysozyme. The aptasensor is characterised by a detection limit of 1 μg mL(-1) and a linear range of 5-50 μg mL(-1). As an application, we examined the usefulness of the aptasensor for monitoring the early stages of the aggregation of lysozyme. It was surprisingly found that, despite a significant decrease in monomer content during aggregation, the response of the aptasensor for protein solutions aged for 12 hours was similar to that for the fresh protein. To correlate the results obtained with the aptasensor with the composition of lysozyme solutions at various time points, we examined them in detail by atomic force microscopy (AFM), thioflavin T fluorescence, size-exclusion chromatography (SEC) and Matrix Assisted Laser Desorption Ionisation Time of Flight Mass Spectrometry (MALDI-TOF-MS). All methods together indicated that during the initial hours of aggregation, the protein solutions contained small lysozyme oligomers (mainly dimers) and decreasing amounts of monomers. Our results thus suggest that the aptamer also recognizes lysozyme dimers/oligomers. A higher non-specific binding was observed for the aggregated lysozyme at the surface of the aptasensor as compared to the native protein. This was attributed to the hydrophobic patches which are exposed by the unfolded lysozyme and/or oligomer species, allowing for different adsorption and organisation at the surface of the aptasensor. This hypothesis is supported by square wave voltammetry (SWV) studies using solutions of aggregated lysozyme. A higher electrochemical signal due to the direct oxidation of tyrosine/tryptophan residues was observed for aged protein solutions as compared to the fresh solution, indicative of an increased number of such exposed electroactive residues and of overall increased surface hydrophobicity of the protein. Our work presents a label-free lysozyme aptasensor that is useful not only for the detection of the protein monomer but also for observing the onset of aggregation. The approach can be extended to other proteins which are prone to aggregation.
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Affiliation(s)
- Alina Vasilescu
- International Centre of Biodynamics, 1B Intrarea Portocalelor, sector 6, 060101, Bucharest, Romania.
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Chen X, He C, Zhang Z, Wang J. Sensitive chemiluminescence detection of wild-type p53 protein captured by surface-confined consensus DNA duplexes. Biosens Bioelectron 2013; 47:335-9. [PMID: 23603130 DOI: 10.1016/j.bios.2013.03.059] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Revised: 03/08/2013] [Accepted: 03/20/2013] [Indexed: 01/10/2023]
Abstract
A novel chemiluminescence (CL) biosensor for sensitive detection of wild-type p53 protein has been proposed. The wild-type p53 protein in solution was captured by highly specific consensus double-stranded (ds) oligonucleotides (ODNs) preimmobilized onto a gold plate. The cysteine residues on the exterior of the wild-type p53 molecules were then derivatized with N-biotinoyl-N'-(6-maleimidohexanoyl) hydrazide (biotin-Mi) for the attachment of streptavidin-horseradish peroxidase (SA-HRP) complex. The attached HRP molecules could catalyze the CL reaction between luminol and H2O2, producing an enhanced CL signal. The CL intensity was dependent on the surface coverage of the HRP molecules, which was related to the concentration of wild-type p53 protein. Under the optimal experimental conditions, the CL intensity increased linearly with the concentration of wild-type p53 protein from 0.01 to 0.5nM. The detection limit was estimated to be 3.8pM. The proposed method has been successfully utilized for the assay of wild-type p53 protein in normal and cancer cell lysates. The sensing protocol is sensitive, cost-effective, and holds great promise for clinical diagnosis.
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Affiliation(s)
- Xiaolan Chen
- College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, Hunan, People's Republic of China
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Wang X, Wang X, Wang X, Chen F, Zhu K, Xu Q, Tang M. Novel electrochemical biosensor based on functional composite nanofibers for sensitive detection of p53 tumor suppressor gene. Anal Chim Acta 2012; 765:63-9. [PMID: 23410627 DOI: 10.1016/j.aca.2012.12.037] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 12/14/2012] [Accepted: 12/20/2012] [Indexed: 01/10/2023]
Abstract
A novel electrochemical biosensor based on functional composite nanofibers for sensitive hybridization detection of p53 tumor suppressor using methylene blue (MB) as an electrochemical indicator is developed. The carboxylated multi-walled carbon nanotubes (MWNTs) doped nylon 6 (PA6) composite nanofibers (MWNTs-PA6) was prepared using electrospinning, which served as the nanosized backbone for pyrrole (Py) electropolymerization. The functional composite nanofibers (MWNTs-PA6-PPy) used as supporting scaffolds for ssDNA immobilization can dramatically increase the amount of DNA attachment and the hybridization sensitivity. The biosensor displayed good sensitivity and specificity. The target wild type p53 sequence (wtp53) can be detected as low as 50 fM and the discrimination is up to 57.5% between the wtp53 and the mutant type p53 sequence (mtp53). It holds promise for the early diagnosis of cancer development and monitoring of patient therapy.
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Affiliation(s)
- Xiaoying Wang
- Key Laboratory of Environmental Medicine and Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing 210009, China.
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Electrocatalytic oxidation of tyrosines shows signal enhancement in label-free protein biosensors. Trends Analyt Chem 2012. [DOI: 10.1016/j.trac.2012.07.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Ryvolova M, Hynek D, Skutkova H, Adam V, Provaznik I, Kizek R. Structural changes in metallothionein isoforms revealed by capillary electrophoresis and Brdicka reaction. Electrophoresis 2012; 33:270-9. [DOI: 10.1002/elps.201100312] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Marketa Ryvolova
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Brno, Czech Republic
- Department of Microelectronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - David Hynek
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Brno, Czech Republic
| | - Helena Skutkova
- Department of Biomedical Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Brno, Czech Republic
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
| | - Ivo Provaznik
- Department of Biomedical Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Brno, Czech Republic
- Central European Institute of Technology, Brno University of Technology, Brno, Czech Republic
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Sensitive detection of p53 tumor suppressor gene using an enzyme-based solid-state electrochemiluminescence sensing platform. Biosens Bioelectron 2011; 26:3608-13. [DOI: 10.1016/j.bios.2011.02.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Revised: 01/21/2011] [Accepted: 02/09/2011] [Indexed: 11/20/2022]
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10
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Diopan V, Shestivska V, Zitka O, Galiova M, Adam V, Kaiser J, Horna A, Novotny K, Liska M, Havel L, Zehnalek J, Kizek R. Determination of Plant Thiols by Liquid Chromatography Coupled with Coulometric and Amperometric Detection in Lettuce Treated by Lead(II) Ions. ELECTROANAL 2010. [DOI: 10.1002/elan.200900374] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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11
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Wang Y, Zhu X, Wu M, Xia N, Wang J, Zhou F. Simultaneous and Label-Free Determination of Wild-Type and Mutant p53 at a Single Surface Plasmon Resonance Chip Preimmobilized with Consensus DNA and Monoclonal Antibody. Anal Chem 2009; 81:8441-6. [DOI: 10.1021/ac9014269] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yongcan Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, People’s Republic of China 410083, Cancer Research Institute, Central South University, Changsha, Hunan, People’s Republic of China 410013, and Department of Chemistry and Biochemistry, California State University, Los Angeles, Los Angeles, California 90032
| | - Xu Zhu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, People’s Republic of China 410083, Cancer Research Institute, Central South University, Changsha, Hunan, People’s Republic of China 410013, and Department of Chemistry and Biochemistry, California State University, Los Angeles, Los Angeles, California 90032
| | - Minghua Wu
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, People’s Republic of China 410083, Cancer Research Institute, Central South University, Changsha, Hunan, People’s Republic of China 410013, and Department of Chemistry and Biochemistry, California State University, Los Angeles, Los Angeles, California 90032
| | - Ning Xia
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, People’s Republic of China 410083, Cancer Research Institute, Central South University, Changsha, Hunan, People’s Republic of China 410013, and Department of Chemistry and Biochemistry, California State University, Los Angeles, Los Angeles, California 90032
| | - Jianxiu Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, People’s Republic of China 410083, Cancer Research Institute, Central South University, Changsha, Hunan, People’s Republic of China 410013, and Department of Chemistry and Biochemistry, California State University, Los Angeles, Los Angeles, California 90032
| | - Feimeng Zhou
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, People’s Republic of China 410083, Cancer Research Institute, Central South University, Changsha, Hunan, People’s Republic of China 410013, and Department of Chemistry and Biochemistry, California State University, Los Angeles, Los Angeles, California 90032
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Huska D, Adam V, Zitka O, Kukacka J, Prusa R, Kizek R. Chronopotentiometric Stripping Analysis of Gelatinase B, Collagen and Their Interaction. ELECTROANAL 2009. [DOI: 10.1002/elan.200804440] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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13
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Huska D, Adam V, Babula P, Hrabeta J, Stiborova M, Eckschlager T, Trnkova L, Kizek R. Square-Wave Voltammetry as a Tool for Investigation of Doxorubicin Interactions with DNA Isolated from Neuroblastoma Cells. ELECTROANAL 2009. [DOI: 10.1002/elan.200804429] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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14
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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.
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Krizkova S, Fabrik I, Adam V, Kukacka J, Prusa R, Chavis GJ, Trnkova L, Strnadel J, Horak V, Kizek R. Utilizing of Adsorptive Transfer Stripping Technique Brdicka Reaction for Determination of Metallothioneins Level in Melanoma Cells, Blood Serum and Tissues. SENSORS (BASEL, SWITZERLAND) 2008; 8:3106-3122. [PMID: 27879868 PMCID: PMC3675534 DOI: 10.3390/s8053106] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2008] [Accepted: 05/09/2008] [Indexed: 11/16/2022]
Abstract
In the paper we utilized the adsorptive transfer stripping differential pulse voltammetry Brdicka reaction for the determination of metallothioneins (MT) in melanoma cells, animal melanoma tissues (MeLiM miniature pig) and blood serum of patients with malignant melanoma. Primarily we attempted to investigate the influence of dilution of real sample on MT electrochemical response. Dilution of samples of 1 000 times was chosen the most suitable for determination of MT level in biological samples. Then we quantified the MT level in the melanoma cells, the animal melanoma tissues and the blood serum samples. The MT content in the cells varied within the range from 4.2 to 11.2 μM. At animal melanoma tissues (melanomas localized on abdomen, back limb and dorsum) the highest content of MT was determined in the tumour sampled on the back of the animal and was nearly 500 μg of MTs per gram of a tissue. We also quantified content of MT in metastases, which was found in liver, spleen and lymph nodes. Moreover the average MT level in the blood serum samples from patients with melanoma was 3.0 ± 0.8 μM. MT levels determined at melanoma samples were significantly (p < 0.05) higher compared to control ones at cells, tissues and blood serum.
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Affiliation(s)
- Sona Krizkova
- Department of Chemistry and Biochemistry Faculty of Agronomy, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Ivo Fabrik
- Department of Chemistry and Biochemistry Faculty of Agronomy, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry Faculty of Agronomy, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
- 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 Kukacka
- Department of Clinical Biochemistry and Pathobiochemistry, 2nd Faculty of Medicine, Charles University, V Uvalu 84, CZ-150 06 Prague 5, Czech Republic
| | - Richard Prusa
- Department of Clinical Biochemistry and Pathobiochemistry, 2nd Faculty of Medicine, Charles University, V Uvalu 84, CZ-150 06 Prague 5, Czech Republic
| | - Grace J Chavis
- Department of Chemistry, University of California, One Shields Avenue, CA-956 16 Davis, USA
| | - Libuse Trnkova
- Department of Chemistry, Faculty of Science, Masaryk University, Kotlarska 2, CZ-611 37 Brno, Czech Republic
| | - Jan Strnadel
- Laboratory of Tumour Biology, Department of Animal Embryology, Cell and Tissue Differentitation, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, v.v.i., CZ-277 21 Libechov, Czech Republic
| | - Vratislav Horak
- Laboratory of Tumour Biology, Department of Animal Embryology, Cell and Tissue Differentitation, Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, v.v.i., CZ-277 21 Libechov, Czech Republic
| | - Rene Kizek
- Department of Chemistry and Biochemistry Faculty of Agronomy, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic.
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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]
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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.
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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:
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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.
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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.
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Wang J, Zhu X, Tu Q, Guo Q, Zarui CS, Momand J, Sun XZ, Zhou F. Capture of p53 by electrodes modified with consensus DNA duplexes and amplified voltammetric detection using ferrocene-capped gold nanoparticle/streptavidin conjugates. Anal Chem 2008; 80:769-74. [PMID: 18179182 DOI: 10.1021/ac0714112] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
p53, a tumor suppressor protein and a transcription factor, is capable of inhibiting the growth of tumor cells by eliciting either cell-cycle arrest or apoptosis through a cascade of events. p53 binds sites within the promoters of several genes that conform to a sequence commonly defined as the consensus site. In more than 50% of cancer cases, the p53 gene has been found to be mutated and the p53 protein loses its ability to bind the consensus DNA. In this work, double-stranded (ds-) oligonucleotides (ODNs) containing the consensus site are immobilized onto gold electrodes to capture wild-type p53. The cysteine residues on the exterior of the p53 molecule were derivatized for the attachment of gold nanoparticle/streptavidin conjugates capped with multiple ferrocene (Fc) groups. Well-defined voltammetric peaks of high signal intensity were obtained, and p53 concentration as low as 2.2 pM was measured. The peak heights were found to be dependent on the surface density of the consensus ds-ODN, the sequence of the immobilized ODNs, and the p53 concentration. With base pair(s) in the full consensus binding sequence altered, the level of p53 binding was found to decrease sharply, and no p53 binding occurred at electrodes covered with nonconsensus ds-ODNs. The amenability of this method to the analyses of p53 from normal and cancer cell lysates was also demonstrated. Owing to the p53 mutation in the cancer cells, the concentration of the wild-type p53 was found to decrease significantly (by about 50-182 times). The sensitivity and amenability for real sample analysis of the method compared well with enzyme-linked immunosorbant assay (ELISA), and complements ELISA in that wild-type p53, instead of total p53 (wild-type and mutant p53) concentration, is measured. The method described herein is simple and selective and does not require the use of p53 antibodies.
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Affiliation(s)
- Jianxiu Wang
- College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan, People's Republic of China 410083
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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]
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21
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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]
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23
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Kukacka J, Zitka O, Horna A, Stejskal K, Zehnalek J, Adam V, Havel L, Zeman L, Prusa R, Trnkova L, Kizek R. A new tool for distinguishing of different structural forms of lactoferrin. FASEB J 2007. [DOI: 10.1096/fasebj.21.5.a635] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jiri Kukacka
- Dep. of Clinical Biochemistry and PathobiochemistryCharles University 2nd Medical SchoolV Uvalu 84Prague15006Czech Republic
| | - Ondrej Zitka
- Dep. of Chemistry and BiochemistryMendel University of Agriculture and ForestryZemedelska 1BrnoCzech Republic
| | - Ales Horna
- Radanal LtdOkruzni 613PardubiceCzech Republic
| | - Karel Stejskal
- Dep. of Chemistry and BiochemistryMendel University of Agriculture and ForestryZemedelska 1BrnoCzech Republic
| | - Josef Zehnalek
- Dep. of Chemistry and BiochemistryMendel University of Agriculture and ForestryZemedelska 1BrnoCzech Republic
| | - Vojtech Adam
- Dep. of Chemistry and BiochemistryMendel University of Agriculture and ForestryZemedelska 1BrnoCzech Republic
| | - Ladislav Havel
- Dep. of Chemistry and BiochemistryMendel University of Agriculture and ForestryZemedelska 1BrnoCzech Republic
| | - Ladislav Zeman
- Dep. of Chemistry and BiochemistryMendel University of Agriculture and ForestryZemedelska 1BrnoCzech Republic
| | - Richard Prusa
- Dep. of Clinical Biochemistry and PathobiochemistryCharles University 2nd Medical SchoolV Uvalu 84Prague15006Czech Republic
| | - Libuse Trnkova
- Dep. of Theoretical and Physical ChemistryMasaryk UniversityKotlarska 2BrnoCzech Republic
| | - Rene Kizek
- Dep. of Chemistry and BiochemistryMendel University of Agriculture and ForestryZemedelska 1BrnoCzech Republic
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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.
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Affiliation(s)
- Radka Mikelova
- Department of Chemistry and Biochemistry, Mendel University of Agriculture and Forestry, Zemedelska 1, CZ-613 00 Brno, Czech Republic
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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]
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