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Kassir AA, Cheignon C, Charbonnière LJ. Exploitation of Luminescent Lanthanide Nanoparticles for a Sensitivity-Enhanced ELISA Detection Method. Anal Chem 2024; 96:2107-2116. [PMID: 38277386 DOI: 10.1021/acs.analchem.3c04821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2024]
Abstract
A new detection method based on the photoluminescence properties of dye-sensitized lanthanide nanoparticles (Ln NPs) was developed for enzyme-linked immunosorbent assays (ELISAs). In this method, the horseradish peroxidase (HRP) enzyme catalyzes the oxidation of phenol derivatives in the presence of hydrogen peroxide, providing dimers that are able to interact with the Ln NP surface and to efficiently photosensitize the Ln ions. Due to the very long emission lifetime of Ln, the time-gated detection of Ln NP luminescence allows the elimination of background noise due to the biological environment. After a comparison of the enzyme-catalyzed oxidation of various phenol derivatives, methyl 4-hydroxyphenyl acetate (MHPA) was selected as the most promising substrate, as the highest Ln emission intensity was observed following its HRP-catalyzed oxidation. After a meticulous optimization of the conditions of both the enzymatic reaction and the Ln sensitization (buffer, pH, concentration of the reactants, NP type, etc.), this new detection method was successfully implemented in a commercial insulin ELISA kit as a proof-of-concept, with an increased sensitivity compared to the commercial detection method.
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Affiliation(s)
- Ali A Kassir
- Equipe de Synthèse pour l'Analyse, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, 67087 Strasbourg, France
| | - Clémence Cheignon
- Equipe de Synthèse pour l'Analyse, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, 67087 Strasbourg, France
| | - Loïc J Charbonnière
- Equipe de Synthèse pour l'Analyse, IPHC, UMR 7178 CNRS, Université de Strasbourg, ECPM, 67087 Strasbourg, France
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Zhu F, Zi L, Yang P, Wei Y, Zhong R, Wang Y, You C, Li Y, Tian M, Gu Z. Efficient Iron and ROS Nanoscavengers for Brain Protection after Intracerebral Hemorrhage. ACS APPLIED MATERIALS & INTERFACES 2021; 13:9729-9738. [PMID: 33599495 DOI: 10.1021/acsami.1c00491] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Intracerebral hemorrhage (ICH) will be accompanied by the overload of iron and reactive oxygen species (ROS) following hematoma clearance. Although deferoxamine (DFO) has been widely utilized as a clinical first-line siderophore to remove the iron overload, the ROS-inducing damage still greatly limits the therapeutic effect of DFO. To address this issue, we designed and fabricated a series of dual-functional macromolecular nanoscavengers featuring high-density DFO units and catechol moieties. Note that the former units could effectively remove the iron overload, while the latter ones could efficiently deplete the ROS. The resulting nanoscavengers efficiently down-regulate the iron and ROS levels as well as significantly reduce the cell death in both iron-overloaded RAW 264.7 cells and the ICH mice model. This work suggests a novel clue for the ICH-ameliorated iron-depleting interventional therapeutic regimen.
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Affiliation(s)
- Fang Zhu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Liu Zi
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
| | - Peng Yang
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Yang Wei
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
| | - Rui Zhong
- Institute of Blood Transfusion, Chinese Academy of Medical Sciences, Peking Union Medical College, Chengdu, Sichuan 610052, P. R. China
| | - Yan Wang
- Core Facilities of West China Hospital, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
| | - Chao You
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
| | - Yiwen Li
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
| | - Meng Tian
- Neurosurgery Research Laboratory, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P. R. China
| | - Zhipeng Gu
- College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, Sichuan 610065, P. R. China
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de Oliveira Garcia S, Sibaja KVM, Nogueira WV, Feltrin ACP, Pinheiro DFA, Cerqueira MBR, Badiale Furlong E, Garda-Buffon J. Peroxidase as a simultaneous degradation agent of ochratoxin A and zearalenone applied to model solution and beer. Food Res Int 2020; 131:109039. [PMID: 32247492 DOI: 10.1016/j.foodres.2020.109039] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 01/12/2020] [Accepted: 01/26/2020] [Indexed: 12/16/2022]
Abstract
The aim of this study was to evaluate the action of the commercial peroxidase (POD) enzyme (Armoracia rusticana) on the simultaneous degradation of ochratoxin A (OTA) and zearalenone (ZEA) in model solution and beer. For this purpose, the reaction parameters for POD action were optimized, POD application in the degradation of mycotoxins in model solution and beer was evaluated and the kinetic parameters of POD were defined (Michaelis-Menten constant - KM and maximal velocity - Vmax). In the reaction conditions (pH 7, ionic strength of 25 mM, incubation at 30 °C, addition of 26 mM H2O2 and 1 mM potassium ion), POD (0.6 U mL-1) presented the maximum activity for simultaneous degradation of OTA and ZEA of 27.0 and 64.9%, respectively, in model solution after 360 min. The application of POD in beer resulted in the simultaneous degradation of OTA and ZEA of 4.8 and 10.9%, respectively. The kinetic parameters KM and Vmax for degradation of OTA and ZEA were 50 and 10,710 nM and 0.168 and 72 nM min-1, respectively. Therefore, POD can be a promising alternative to mitigate the contamination of OTA and ZEA in model solution and beer, minimizing their effects in humans.
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Affiliation(s)
- Sabrina de Oliveira Garcia
- Post Graduate Program in Engineering and Science of Food, School of Chemistry and Food, Laboratory of Food Science and Mycotoxins, Federal University of Rio Grande (FURG), Av. Itália, km 8, Carreiros, Rio Grande, RS CEP 96203-900, Brazil
| | - Karen Vanessa Marimón Sibaja
- Post Graduate Program in Engineering and Science of Food, School of Chemistry and Food, Laboratory of Food Science and Mycotoxins, Federal University of Rio Grande (FURG), Av. Itália, km 8, Carreiros, Rio Grande, RS CEP 96203-900, Brazil
| | - Wesclen Vilar Nogueira
- Post Graduate Program in Engineering and Science of Food, School of Chemistry and Food, Laboratory of Food Science and Mycotoxins, Federal University of Rio Grande (FURG), Av. Itália, km 8, Carreiros, Rio Grande, RS CEP 96203-900, Brazil
| | - Ana Carla Penteado Feltrin
- Post Graduate Program in Engineering and Science of Food, School of Chemistry and Food, Laboratory of Food Science and Mycotoxins, Federal University of Rio Grande (FURG), Av. Itália, km 8, Carreiros, Rio Grande, RS CEP 96203-900, Brazil
| | - Diean Fabiano Alvares Pinheiro
- Post Graduate Program in Engineering and Science of Food, School of Chemistry and Food, Laboratory of Food Science and Mycotoxins, Federal University of Rio Grande (FURG), Av. Itália, km 8, Carreiros, Rio Grande, RS CEP 96203-900, Brazil
| | - Maristela Barnes Rodrigues Cerqueira
- Post Graduate Program in Engineering and Science of Food, School of Chemistry and Food, Laboratory of Food Science and Mycotoxins, Federal University of Rio Grande (FURG), Av. Itália, km 8, Carreiros, Rio Grande, RS CEP 96203-900, Brazil
| | - Eliana Badiale Furlong
- Post Graduate Program in Engineering and Science of Food, School of Chemistry and Food, Laboratory of Food Science and Mycotoxins, Federal University of Rio Grande (FURG), Av. Itália, km 8, Carreiros, Rio Grande, RS CEP 96203-900, Brazil.
| | - Jaqueline Garda-Buffon
- Post Graduate Program in Engineering and Science of Food, School of Chemistry and Food, Laboratory of Food Science and Mycotoxins, Federal University of Rio Grande (FURG), Av. Itália, km 8, Carreiros, Rio Grande, RS CEP 96203-900, Brazil.
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Permana D, Minamihata K, Tatsuke T, Lee JM, Kusakabe T, Goto M, Kamiya N. Polymerization of Horseradish Peroxidase by a Laccase‐Catalyzed Tyrosine Coupling Reaction. Biotechnol J 2019; 14:e1800531. [DOI: 10.1002/biot.201800531] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 12/29/2018] [Accepted: 01/01/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Dani Permana
- Department of Applied ChemistryGraduate School of Engineering, Kyushu University744 Motooka, Nishi‐ku Fukuoka 819‐0395 Japan
- Research Unit for Clean Technology, Indonesian Institute of Sciences (LIPI)Kampus LIPI Bandung Gedung 50, Jl. Cisitu Bandung 40135 Indonesia
| | - Kosuke Minamihata
- Department of Applied ChemistryGraduate School of Engineering, Kyushu University744 Motooka, Nishi‐ku Fukuoka 819‐0395 Japan
| | - Tsuneyuki Tatsuke
- Laboratory of Insect Genome Science, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu UniversityHigashi‐ku Fukuoka 812‐8581 Japan
| | - Jae M. Lee
- Laboratory of Insect Genome Science, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu UniversityHigashi‐ku Fukuoka 812‐8581 Japan
| | - Takahiro Kusakabe
- Laboratory of Insect Genome Science, Graduate School of Bioresource and Bioenvironmental Sciences, Kyushu UniversityHigashi‐ku Fukuoka 812‐8581 Japan
| | - Masahiro Goto
- Department of Applied ChemistryGraduate School of Engineering, Kyushu University744 Motooka, Nishi‐ku Fukuoka 819‐0395 Japan
- Division of BiotechnologyCenter for Future Chemistry, Kyushu University744 Motooka, Nishi‐ku Fukuoka 819‐0395 Japan
| | - Noriho Kamiya
- Department of Applied ChemistryGraduate School of Engineering, Kyushu University744 Motooka, Nishi‐ku Fukuoka 819‐0395 Japan
- Division of BiotechnologyCenter for Future Chemistry, Kyushu University744 Motooka, Nishi‐ku Fukuoka 819‐0395 Japan
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5
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Nanda Kumar D, Chandrasekaran N, Mukherjee A. Horseradish peroxidase-mediated in situ synthesis of silver nanoparticles: application for sensing of mercury. NEW J CHEM 2018; 42:13763-13769. [DOI: 10.1039/c8nj02083c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Schematic representation for spectrophotometric detection of Hg2+ using an enzyme-mediated formation of silver nanoparticles.
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Affiliation(s)
| | | | - A. Mukherjee
- Centre for Nanobiotechnology
- VIT
- Vellore – 632014
- India
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6
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Fazel R, Torabi SF, Naseri-Nosar P, Ghasempur S, Ranaei-Siadat SO, Khajeh K. Electrospun polyvinyl alcohol/bovine serum albumin biocomposite membranes for horseradish peroxidase immobilization. Enzyme Microb Technol 2016; 93-94:1-10. [DOI: 10.1016/j.enzmictec.2016.07.002] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2016] [Revised: 06/30/2016] [Accepted: 07/08/2016] [Indexed: 01/10/2023]
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7
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Olloqui-Sariego JL, Zakharova GS, Poloznikov AA, Calvente JJ, Hushpulian DM, Gorton L, Andreu R. Interprotein Coupling Enhances the Electrocatalytic Efficiency of Tobacco Peroxidase Immobilized at a Graphite Electrode. Anal Chem 2015; 87:10807-14. [PMID: 26437673 DOI: 10.1021/acs.analchem.5b01710] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Covalent immobilization of enzymes at electrodes via amide bond formation is usually carried out by a two-step protocol, in which surface carboxylic groups are first activated with the corresponding cross-coupling reagents and then reacted with protein amine groups. Herein, it is shown that a modification of the above protocol, involving the simultaneous incubation of tobacco peroxidase and the pyrolytic graphite electrode with the cross-coupling reagents produces higher and more stable electrocatalytic currents than those obtained with either physically adsorbed enzymes or covalently immobilized enzymes according to the usual immobilization protocol. The remarkably improved electrocatalytic properties of the present peroxidase biosensor that operates in the 0.3 V ≤ E ≤ 0.8 V (vs SHE) potential range can be attributed to both an efficient electronic coupling between tobacco peroxidase and graphite and to the formation of intra- and intermolecular amide bonds that stabilize the protein structure and improve the percentage of anchoring groups that provide an adequate orientation for electron exchange with the electrode. The optimized tobacco peroxidase sensor exhibits a working concentration range of 10-900 μM, a sensitivity of 0.08 A M(-1) cm(-2) (RSD 0.05), a detection limit of 2 μM (RSD 0.09), and a good long-term stability, as long as it operates at low temperature. These parameter values are among the best reported so far for a peroxidase biosensor operating under simple direct electron transfer conditions.
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Affiliation(s)
- José Luis Olloqui-Sariego
- Department of Physical Chemistry, University of Sevilla , Profesor García González 1, 41012, Sevilla, Spain
| | - Galina S Zakharova
- A.N. Bach Institute of Biochemistry, Russian Academy of Sciences , Leninsky Prospect 33/2, Moscow, 119071, Russia
| | - Andrey A Poloznikov
- Department of Chemistry, Lomonosov Moscow State University , Vorob'evy Gory 1, Moscow, 119991, Russia
| | - Juan José Calvente
- Department of Physical Chemistry, University of Sevilla , Profesor García González 1, 41012, Sevilla, Spain
| | - Dmitry M Hushpulian
- Department of Chemistry, Lomonosov Moscow State University , Vorob'evy Gory 1, Moscow, 119991, Russia
| | - Lo Gorton
- Department of Biochemistry and Structural Biology, University of Lund, Kemicentrum , Box 118, 221 00, Lund, Sweden
| | - Rafael Andreu
- Department of Physical Chemistry, University of Sevilla , Profesor García González 1, 41012, Sevilla, Spain
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8
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Cao W, Chen L, Fu Y, Tan Z, Qu B. A highly efficient and versatile microchip capillary electrophoresis method for DNA separation using gold nanoparticle as a tag. J Sep Sci 2011; 34:939-46. [DOI: 10.1002/jssc.201000755] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2010] [Revised: 01/24/2011] [Accepted: 01/25/2011] [Indexed: 12/22/2022]
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9
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Cao W, Su M, Zhang S. Rapid and sensitive DNA target detection using enzyme amplified electrochemical detection based on microchip. Electrophoresis 2010; 31:659-65. [DOI: 10.1002/elps.200900538] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Andrieux CP, Limoges B, Savéant JM, Yazidi D. Cyclic voltammetric responses of horseradish peroxidase multilayers on electrodes. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:10807-15. [PMID: 17129064 DOI: 10.1021/la061193s] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The catalytic responses obtained with step-by-step neutravidin-biotin deposition of successive monolayers of HRP are analyzed by means of cyclic voltammetry. The theoretical tools that have been developed allowed full characterization of the multilayered HRP coatings by means of a combination between closed-form analysis of limiting behaviors and finite difference numerical computations. An analysis of the experiments in which the number of monolayers was extended to 16 allowed an approximate determination of the average thickness of each monolayer, pointing to a compact arrangement of neutravidin and biotinylated HRP. The piling up of so many monolayers on the electrode allowed an improvement of the catalytic current by a factor of ca. 10, leading to very good sensitivities in term of cosubstrate detection.
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Affiliation(s)
- Claude P Andrieux
- Laboratoire d'Electrochimie Moléculaire, UMR CNRS 7591, Université de Paris 7-Denis Diderot, 2 place Jussieu, 75251 Paris Cedex 05, France
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11
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Eryomin AN, Semashko TV, Mikhailova RV. Cooxidation of phenol and 4-aminoantipyrin, catalyzed by polymers and copolymers of horseradish root peroxidase and Penicillium funiculosum 46.1 glucose oxidase. APPL BIOCHEM MICRO+ 2006. [DOI: 10.1134/s0003683806040119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Budnikova LP, Eryomin AN. Synthesis and properties of horseradish peroxidase copolymers. APPL BIOCHEM MICRO+ 2006. [DOI: 10.1134/s0003683806020025] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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14
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Determination of tumor marker CA125 by capillary electrophoretic enzyme immunoassay with electrochemical detection. Anal Chim Acta 2003. [DOI: 10.1016/s0003-2670(03)00880-8] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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He Z, Jin W. Capillary electrophoretic enzyme immunoassay with electrochemical detection for thyroxine. Anal Biochem 2003; 313:34-40. [PMID: 12576055 DOI: 10.1016/s0003-2697(02)00508-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A capillary electrophoretic enzyme immunoassay with electrochemical detection (CE-EIA-ED) has been developed. In this method, antigen (Ag) competes with horseradish peroxidase (HRP)-labeled antigen (HRP-Ag) for a limited number of antibody (Ab) binding sites. The free HRP-Ag and the bound HRP-Ag-Ab complex are separated by capillary electrophoresis in a separation capillary. Then they catalyze the oxidation of their enzyme substrate 3,3',5,5'-tetramethylbenzide (TMB (reduced form)) with H(2)O(2) in a reaction capillary, which follows the separation capillary. The reaction product (TMB (oxidized form)) is amperometrically determined using a carbon fiber microdisk bundle electrode at the outlet of the reaction capillary. Due to the amplification of the enzyme, the concentration of TMB(Ox) is much higher than those of free HRP-Ag and the bound HRP-Ag-Ab complex. Therefore, the limit of detection (LOD) of CE-EIA-ED is very low. The method has been used to determine thyroxine in human serum. A concentration of LOD of 3.8 x 10(-9)mol/L, which corresponds to a mass LOD of 23.2 amol, was achieved.
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Affiliation(s)
- Zhihui He
- School of Chemistry and Chemical Engineering, Shandong University, Jinan 250100, PR China
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16
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Abstract
Horseradish peroxidase (HRP) was biotinylated with biotinamidocaproate N-hydroxysuccinimide ester (BcapNHS) in a controlled manner to obtain biotinylated horseradish peroxidase (Bcap-HRP) with two biotin moieties per enzyme molecule. Avidin-mediated immobilization of HRP was achieved by first coupling avidin on carboxy-derivatized polystyrene beads using a carbodiimide, followed by the attachment of the disubstituted biotinylated horseradish peroxidase from one of the two biotin moieties through the avidin-biotin interaction (controlled immobilization). Another layer of avidin can be attached to the second biotin on Bcap-HRP, which can serve as a protein linker with additional Bcap-HRP, leading to a layer-by-layer protein assembly of the enzyme. Horseradish peroxidase was also immobilized directly on carboxy-derivatized polystyrene beads by carbodiimide chemistry (conventional method). The reaction kinetics of the native horseradish peroxidase, immobilized horseradish peroxidase (conventional method), controlled immobilized biotinylated horseradish peroxidase on avidin-coated beads, and biotinylated horseradish peroxidase crosslinked to avidin-coated polystyrene beads were all compared. It was observed that in solution the biotinylated horseradish peroxidase retained 81% of the unconjugated enzyme's activity. Also, in solution, horseradish peroxidase and Bcap-HRP were inhibited by high concentrations of the substrate hydrogen peroxide. The controlled immobilized horseradish peroxidase could tolerate much higher concentrations of hydrogen peroxide and, thus, it demonstrates reduced substrate inhibition. Because of this, the activity of controlled immobilized horseradish peroxidase was higher than the activity of Bcap-HRP in solution. It is shown that a layer-by-layer assembly of the immobilized enzyme yields HRP of higher activity per unit surface area of the immobilization support compared to conventionally immobilized enzyme.
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Affiliation(s)
- S V Rao
- Department of Chemical and Materials Engineering, University of Kentucky, Lexington, Kentucky 40506, USA
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17
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Joo H, Chae HJ, Yeo JS, Yoo YJ. Depolymerization of phenolic polymers using horseradish peroxidase in organic solvent. Process Biochem 1997. [DOI: 10.1016/s0032-9592(96)00092-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Schneider T, Wildförster U, Diekmann J. PMN granulocyte elastase--an early indicator of postoperative spondylodiscitis? Acta Neurochir (Wien) 1995; 136:16-20. [PMID: 8748822 DOI: 10.1007/bf01411430] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The diagnosis of spondylodiscitis after lumbar disc surgery has been based so far on clinical abnormalities, non-specific changes in chemical laboratory parameters [erythrocyte sedimentation rate (ESR), C-reactive protein (CRP)] and radiological examinations such as MRI. Such techniques do not enable any clear diagnosis to be made before the 3rd postoperative week. The PMN elastase released from stimulated polymorphonuclear granulocytes has been proved to be a good laboratory parameter by which it is possible to prognosticate bacterial and abacterial organ complications in surgical patients with a high degree of probability. Under investigation were 12 patients with spondylodiscitis out of 1162 operations on herniated lumbar discs. PMN elastase was determined on the 7th postoperative day. In patients with spondylodiscitis and a mean value of 110.5 micrograms/l, the elastase was on average higher by a factor of 2.6 as compared to 88 randomly selected control patients. Since spondylodiscitis is a rare complication, this results in a positive value of only 7%, which does not allow a reliable diagnosis of spondylodiscitis by the elastase assay. But because the negative predictive value is 100%, it is possible to exclude a postoperative spondylodiscitis already on the 7th postoperative day, if the elastase value is normal.
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Affiliation(s)
- T Schneider
- Department of Neurosurgery, University of Bochum, Knappschaftskrankenhaus, Federal Republic of Germany
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19
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Wu J, Bewtra JK, Biswas N, Taylor KE. Effect of H2O2addition mode on enzymatic removal of phenol from wastewater in the presence of polyethylene glycol. CAN J CHEM ENG 1994. [DOI: 10.1002/cjce.5450720515] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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20
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Hoshino N, Miyai K. New screening system for simultaneous determination of two marker proteins by homogeneous enzyme immunoassay. J Clin Pathol 1992; 45:213-6. [PMID: 1372918 PMCID: PMC495473 DOI: 10.1136/jcp.45.3.213] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
AIMS To save time and labour in mass screening, by detecting two marker proteins on one specimen using only one test. METHODS alpha Fetoprotein and ferritin were chosen to demonstrate the principal of this system. The assay reagents were horseradish peroxidase (HRP)-labelled anti-alpha fetoprotein and HRP-labelled anti-ferritin antibodies. After the serum sample had been incubated with these reagents the substrate for HRP was added and the absorbance measured. An absorbance value below the cutoff point indicated that both parameters were within normal limits; a value above the cutoff point indicated that at least one of the two parameters was abnormally high. RESULTS Fifty sera from healthy Japanese subjects were assayed by the simultaneous assay method. All samples gave absorbancy values below the cutoff point. Fifty serum samples from patients with high alpha fetoprotein concentrations (over 20 ng/ml) and 50 samples with high ferritin concentrations (over 200 ng/ml) were also assayed. The absorbancy values of all samples with high alpha fetoprotein concentrations, and all but one sample with high ferritin concentrations gave values above the cutoff point. CONCLUSIONS Although this homogeneous enzyme assay method was applied to the combination of alpha fetoprotein and ferritin, it could be used in mass screening for any other combination of two markers.
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Affiliation(s)
- N Hoshino
- Iatron Laboratories Inc., Tokyo, Japan
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21
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Metelitza DI, Litvinchuk AV, Savenkova MI. Peroxidase-catalyzed co-oxidation of halogen-substituted phenols and 4-aminoantipyrine. ACTA ACUST UNITED AC 1991. [DOI: 10.1016/0304-5102(91)80052-5] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Hafner G, Dreher M, Lütgehaus M, Ehrenthal W, Heubner A, Swars H, Prellwitz W. Determination of human granulocyte elastase by the immunoactivation method on the Hitachi 717 automated analyser. EUROPEAN JOURNAL OF CLINICAL CHEMISTRY AND CLINICAL BIOCHEMISTRY : JOURNAL OF THE FORUM OF EUROPEAN CLINICAL CHEMISTRY SOCIETIES 1991; 29:179-83. [PMID: 2070014 DOI: 10.1515/cclm.1991.29.3.179] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This paper describes a fully mechanized homogeneous immunoassay using the immunoactivation method for the rapid and specific determination of human granulocyte elastase (EC 3.4.21.37) in plasma. The method uses anti-elastase antibody fragments from sheep, conjugated to horseradish peroxidase. These enzyme-antibody conjugates bind to the elastase-alpha 1-proteinase inhibitor complex present in plasma. A separate sample blank with non-specific sheep antibody fragments conjugated to horseradish peroxidase corrects for errors introduced by the sample matrix. Measurements were performed with the clinical chemistry analyser Hitachi 717. A single determination can be performed in 10 min, requiring 24 microliters sample volume. The measuring range is about 20 to 1000 micrograms/l elastase. For within-run precision the coefficients of variation are 4.77%, 4.48% and 1.85% for elastase concentrations of 45.7, 89.1 and 385.4 micrograms/l; for day-to-day precision the coefficients of variation are 15.81%, 7.19% and 4.12% for elastase concentrations of 31.1, 65.5 and 440.2 micrograms/l, respectively. Correlation (y = bx + a) of results with those from the heterogeneous immunoassay showed a good agreement (r = 0.93, b = 1.11, a = -27.0, N = 121). Interferences by endogeneous substances and by drugs at therapeutic doses were not observed. The reference interval, determined by using plasma from 215 healthy individuals (C-reactive protein less than 5 mg/l, leukocyte count 4-8 x 10(9)/l), was 9-56 micrograms/l (2.5th to 97.5th percentile), with a median of 27 micrograms/l.
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Affiliation(s)
- G Hafner
- Institut für Klinische Chemie und Laboratoriumsmedizin, Johannes Gutenberg-Universität Mainz, Germany
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Suzuki K, Hayashi T, Koyama M, Yoshimura T, Shimamoto M, Kimura N, Kita M. Rapid homogeneous enzyme immunoassay of plasma protein C. Clin Chim Acta 1989; 184:227-33. [PMID: 2692877 DOI: 10.1016/0009-8981(89)90055-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A homogeneous EIA (H-EIA) technique for plasma protein C antigen using horseradish peroxidase (HRP) was developed. This technique, which avoids the bound/free separation and washing procedures and shortens the assay time to 30 min, has several advantages over the conventional EIA technique. The measurement was valid for 1.0% to 200% of the plasma protein C level and had intraassay coefficients of variation of 2.3-11.0%. The results of this assay correlated well with those of conventional sandwich EIA (x) with a regression equation of y = 0.782x + 6.637, r = 0.911 (n = 59). This method, which may also be applicable to automatic assay systems, is considered to be suited for clinical laboratory use.
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Affiliation(s)
- K Suzuki
- Department of Laboratory Medicine, Mie University School of Medicine, Tsu, Japan
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