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Khasanov IS, Knyazev BA, Lobastov SA, Anisimov AV, Nikitin PA, Kameshkov OE. Optical Characterization of Thin Films by Surface Plasmon Resonance Spectroscopy Using an Acousto-Optic Tunable Filter. MATERIALS (BASEL, SWITZERLAND) 2023; 16:1820. [PMID: 36902935 PMCID: PMC10004554 DOI: 10.3390/ma16051820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/20/2023] [Accepted: 02/21/2023] [Indexed: 06/18/2023]
Abstract
The paper presents the application of the acousto-optic tunable filter (AOTF) in surface plasmon resonance (SPR) spectroscopy to measure the optical thickness of thin dielectric coatings. The technique presented uses combined angular and spectral interrogation modes to obtain the reflection coefficient under the condition of SPR. Surface electromagnetic waves were excited in the Kretschmann geometry, with the AOTF serving as a monochromator and polarizer of light from a white broadband radiation source. The experiments highlighted the high sensitivity of the method and the lower amount of noise in the resonance curves compared with the laser light source. This optical technique can be implemented for nondestructive testing in the production of thin films in not only the visible, but also the infrared and terahertz ranges.
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Affiliation(s)
- Ildus Sh. Khasanov
- Scientific and Technological Centre of Unique Instrumentation RAS, 117342 Moscow, Russia
| | - Boris A. Knyazev
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
| | - Sergey A. Lobastov
- Scientific and Technological Centre of Unique Instrumentation RAS, 117342 Moscow, Russia
| | - Alexander V. Anisimov
- Scientific and Technological Centre of Unique Instrumentation RAS, 117342 Moscow, Russia
| | - Pavel A. Nikitin
- Scientific and Technological Centre of Unique Instrumentation RAS, 117342 Moscow, Russia
| | - Oleg E. Kameshkov
- Budker Institute of Nuclear Physics SB RAS, 630090 Novosibirsk, Russia
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Oldak L, Chludzinska-Kasperuk S, Milewska P, Grubczak K, Reszec J, Gorodkiewicz E. Laminin-5, Fibronectin, and Type IV Collagen as Potential Biomarkers of Brain Glioma Malignancy. Biomedicines 2022; 10:biomedicines10092290. [PMID: 36140391 PMCID: PMC9496479 DOI: 10.3390/biomedicines10092290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/11/2022] [Accepted: 09/13/2022] [Indexed: 11/30/2022] Open
Abstract
The presented work is based on the quantification of LN-5, FN, and COL IV in blood plasma as potential biomarkers in patients diagnosed with glioma in grades G1 to G4. The obtained concentration results were compared with the protein content in the control group, which consisted of smokers of different ages. The obtained results were statistically analysed and interpreted based on the available clinical description. Quantitative determinations of LN-5, FN, and COL IV were performed with the use of SPRi biosensors specific to the tested proteins. Comparing groups K and G4, as well as G2 and G4, statistically significant relationships between changes in the concentration of individual proteins, were observed. The analysis showed significant correlations between FN and LN-5, between FN and COL IV, and between LN-5 and COL IV. There was a moderate positive correlation between individual proteins and the age of the patient. The ROC analysis distinguished patients with advanced disease from the control group. The results of the research show that LN-5, FN, and COL IV are effective biomarkers of brain glioma that may be helpful in non-invasive diagnosis and determining the grade of the disease.
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Affiliation(s)
- Lukasz Oldak
- Bioanalysis Laboratory, Faculty of Chemistry, University of Bialystok, Ciolkowskiego 1K, 15-245 Bialystok, Poland
- Doctoral School of Exact and Natural Science, Faculty of Chemistry, University of Bialystok, Ciolkowskiego 1K, 15-245 Bialystok, Poland
- Correspondence:
| | | | - Patrycja Milewska
- Biobank, Medical University of Bialystok, Waszyngtona 13, 15-269 Bialystok, Poland
| | - Kamil Grubczak
- Department of Regenerative Medicine and Immune Regulation, Medical University of Bialystok, Waszyngtona 13, 15-269 Bialystok, Poland
| | - Joanna Reszec
- Biobank, Medical University of Bialystok, Waszyngtona 13, 15-269 Bialystok, Poland
- Department of Medical Pathology, Medical University of Bialystok, Waszyngtona 13, 15-269 Bialystok, Poland
| | - Ewa Gorodkiewicz
- Bioanalysis Laboratory, Faculty of Chemistry, University of Bialystok, Ciolkowskiego 1K, 15-245 Bialystok, Poland
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Chang CC, Chen CP, Chen CY, Lin CW. DNA base-stacking assay utilizing catalytic hairpin assembly-induced gold nanoparticle aggregation for colorimetric protein sensing. Chem Commun (Camb) 2016; 52:4167-70. [PMID: 26906691 DOI: 10.1039/c6cc01238h] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
A label-free and enzyme-free colorimetric sensing platform for the amplified detection of fibronectin was developed based on an ingenious combination of catalytic hairpin assembly and a base stacking hybridization-based gold nanoparticle aggregation strategy.
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Affiliation(s)
- Chia-Chen Chang
- Institute of Biomedical Engineering
- National Taiwan University
- Taipei 106
- Republic of China
| | - Chie-Pein Chen
- Department of Obstetrics and Gynecology
- Mackay Memorial Hospital
- Taipei 104
- Republic of China
| | - Chen-Yu Chen
- Department of Obstetrics and Gynecology
- Mackay Memorial Hospital
- Taipei 104
- Republic of China
- Department of Medicine
| | - Chii-Wann Lin
- Institute of Biomedical Engineering
- National Taiwan University
- Taipei 106
- Republic of China
- Institute of Biomedical Electronic and Bioinformatics
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Yunusov D, So M, Shayan S, Okhonin V, Musheev MU, Berezovski MV, Krylov SN. Kinetic capillary electrophoresis-based affinity screening of aptamer clones. Anal Chim Acta 2008; 631:102-7. [PMID: 19046686 DOI: 10.1016/j.aca.2008.10.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2008] [Revised: 10/02/2008] [Accepted: 10/07/2008] [Indexed: 02/07/2023]
Abstract
DNA aptamers are single stranded DNA (ssDNA) molecules artificially selected from random-sequence DNA libraries for their specific binding to a certain target. DNA aptamers have a number of advantages over antibodies and promise to replace them in both diagnostic and therapeutic applications. The development of DNA aptamers involves three major stages: library enrichment, obtaining individual DNA clones, and the affinity screening of the clones. The purpose of the screening is to obtain the nucleotide sequences of aptamers and the binding parameters of their interaction with the target. Highly efficient approaches have been recently developed for the first two stages, while the third stage remained the rate-limiting one. Here, we introduce a new method for affinity screening of individual DNA aptamer clones. The proposed method amalgamates: (i) aptamer amplification by asymmetric PCR (PCR with a primer ratio different from unity), (ii) analysis of aptamer-target interaction, combining in-capillary mixing of reactants by transverse diffusion of laminar flow profiles (TDLFP) and affinity analysis using kinetic capillary electrophoresis (KCE), and (iii) sequencing of only aptamers with satisfying binding parameters. For the first time we showed that aptamer clones can be directly used in TDLFP/KCE-based affinity analysis without an additional purification step after asymmetric PCR amplification. We also demonstrated that mathematical modeling of TDLFP-based mixing allows for the determination of K(d) values for the in-capillary reaction of an aptamer and a target and that the obtained K(d) values can be used for the accurate affinity ranking of aptamers. The proposed method does not require the knowledge of aptamer sequences before screening, avoids lengthy (3-5 h) purification steps of aptamer clones, and minimizes reagent consumption to nanoliters.
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Affiliation(s)
- Diana Yunusov
- Department of Chemistry, York University, Toronto, Ontario M3J 1P3, Canada
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Sun Y, Song D, Bai Y, Wang L, Tian Y, Zhang H. Improvement of surface plasmon resonance biosensor with magnetic beads via assembled polyelectrolyte layers. Anal Chim Acta 2008; 624:294-300. [DOI: 10.1016/j.aca.2008.06.042] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2008] [Revised: 06/20/2008] [Accepted: 06/25/2008] [Indexed: 10/21/2022]
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Sun Y, Bai Y, Song D, Li X, Wang L, Zhang H. Design and performances of immunoassay based on SPR biosensor with magnetic microbeads. Biosens Bioelectron 2007; 23:473-8. [PMID: 17764924 DOI: 10.1016/j.bios.2007.06.016] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2007] [Revised: 06/11/2007] [Accepted: 06/15/2007] [Indexed: 10/23/2022]
Abstract
A surface plasmon resonance (SPR) biosensor system was developed for immunoassay, based on the conjugates of magnetic microbeads coupling with antibody which could be trapped on the Au film firmly due to the magnetic force. The magnetic microbeads were used as the solid support for the heat shock protein 70 (Hsp 70) antibody and antibody immobilized magnetic microbeads were utilized instead of the single antibody for the determination of Hsp 70. Since the magnetic bead is coated with dextran, the antibodies and some specific biomolecular receptors can be immobilized using a variety of chemical reactions. Compared to traditional antibody immobilization on the sensing film, there is not a covalent link between the Au film and the antibody. There is a great advantage in that sensor can be stripped and reused, and the same chemistry used to derivative dextran-coated SPR sensors can be used for the magnetic bead-coated sensors. The sensing layer was formed well. Different dilution ratios (v/v) of the conjugates result in different detectable ranges. When the dilution ratios of the conjugate are 1:10 and 1:5, the lowest concentrations of Hsp 70 that can be detected are 1.50 and 0.30 microg ml(-1), respectively.
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Affiliation(s)
- Ying Sun
- College of Chemistry, Jilin University, Changchun 130012, PR China
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Abstract
Kinetic capillary electrophoresis (KCE) is defined as capillary electrophoresis of species that interact during electrophoresis. KCE can serve as a conceptual platform for development of homogeneous kinetic affinity methods for affinity measurements (measurements of binding parameters and quantitative measurements) and affinity purification (purification of known molecules and search of unknown molecules). A number of different KCE methods can be designed by varying initial and boundary conditions - the way interacting species enter and exit the capillary. KCE methods will find multiple practical applications in the designing of biomedical diagnostics and the development of drug candidates. Here, the concept of KCE, its up-to-date applications, and future prospective are reviewed.
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Affiliation(s)
- Sergey N Krylov
- Department of Chemistry, York University, Toronto, Ontario, Canada.
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Sun Y, Song D, Li Z, Bai Y, Zhang H. Surface plasmon resonance biosensor based on Hg/Ag–Au film. Anal Bioanal Chem 2007; 387:1875-82. [PMID: 17205267 DOI: 10.1007/s00216-006-1042-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2006] [Revised: 11/16/2006] [Accepted: 11/22/2006] [Indexed: 10/23/2022]
Abstract
Mercury or silver was electrodeposited on an Au surface to form an Hg-Au or Ag-Au film. Wavelength-modulation SPR biosensors based on this Hg/Ag-Au film were then used to determine human IgG and rabbit IgG. When direct immunoreactions were performed on the Au sensing surface, the range of concentrations of human IgG and rabbit IgG that could be determined were 2.00-40.00 microg/ml and 2.50-40.00 microg/ml, respectively. When Hg was electrodeposited onto the Au film for 1200 s, the range of concentrations of human IgG and rabbit IgG that could be determined were 0.50-40.00 microg/ml and 0.63-40.00 microg/ml, respectively. When Ag was electrodeposited onto the Au film for 1500 s, the range of concentrations of human IgG and rabbit IgG that could be determined were 0.25-20.00 and 0.42-20.00 microg/ml, respectively. The biosensor based on Ag-Au film was therefore found to be the most sensitive of the three types of biosensor tested, giving limits of determination that were up to eight times lower than those obtained with a biosensor based on Au film alone.
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Affiliation(s)
- Ying Sun
- College of Chemistry, Jilin University, Changchun 130012, China
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Sensitivity enhancement of wavelength modulation surface plasmon resonance biosensor by improving the baseline solution. Anal Chim Acta 2006. [DOI: 10.1016/j.aca.2006.04.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Krylov SN. Nonequilibrium capillary electrophoresis of equilibrium mixtures (NECEEM): A novel method for biomolecular screening. ACTA ACUST UNITED AC 2006; 11:115-22. [PMID: 16418314 DOI: 10.1177/1087057105284339] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nonequilibrium capillary electrophoresis of equilibrium mixtures (NECEEM) is a new separation-based affinity method. It has kinetic capabilities exceeding those of surface plasmon resonance (SPR) and does not require immobilization of molecules on the surface. Another distinctive feature of NECEEM is that--if it is combined with an advanced method for the mixing solutions inside a capillary, termed transverse diffusion of laminar flow profiles (TDLFP)--it requires only nanoliter volumes of solutions. The proven applications of NECEEM to biomolecular screening include 1) measuring kinetic and thermodynamic parameters of protein-ligand interactions, 2) quantitative affinity analyses of proteins and hybridization analyses of DNA and RNA, and 3) selection of binding ligands from combinatorial libraries. NECEEM is easy to automate and parallelize. Because of its simplicity and analytical power, NECEEM has the potential to become a workhorse in studies of biomolecular interactions. The author reviews theoretical bases of NECEEM and its applications to biomolecular screening.
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Affiliation(s)
- Sergey N Krylov
- Department of Chemistry, York University, Toronto, Ontario, Canada.
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