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Shu H, Chen Y, Wu N. Analysis of pesticides based on immobilized housefly head acetylcholinesterase reactor with choline oxidase and horseradish peroxidase carbon paste electrode. J CHIN CHEM SOC-TAIP 2020. [DOI: 10.1002/jccs.202000350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hun‐Chi Shu
- Department of Chemistry National Dong Hwa University Hualien Taiwan, ROC
| | - Yuh‐Shih Chen
- Department of Chemistry National Dong Hwa University Hualien Taiwan, ROC
| | - Ning‐Ping Wu
- Department of Chemistry National Dong Hwa University Hualien Taiwan, ROC
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2
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Shu HC, Chung SW. Analysis of Organophosphorous Pesticides Based on Housefly Acetylcholinesterase Using Sequential Injection Analysis. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201700248] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Hun-Chi Shu
- Department of Chemistry; National Dong Hwa University; Hualien 974 Taiwan, ROC
| | - Shu-Wen Chung
- Department of Chemistry; National Dong Hwa University; Hualien 974 Taiwan, ROC
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3
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Cabal J, Bajgar J, Kassa J. Evaluation of flow injection analysis for determination of cholinesterase activities in biological material. Chem Biol Interact 2010; 187:225-8. [PMID: 20188079 DOI: 10.1016/j.cbi.2010.02.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Revised: 02/02/2010] [Accepted: 02/15/2010] [Indexed: 11/25/2022]
Abstract
The method for automatic continual monitoring of acetylcholinesterase (AChE) activity in biological material is described. It is based on flexible system of plastic pipes mixing samples of biological material with reagents for enzyme determination; reaction product penetrates through the semipermeable membrane and it is spectrophotometrically determined (Ellman's method). It consists of sampling (either in vitro or in vivo), adding the substrate and flowing to dialyzer; reaction product (thiocholine) is dialyzed and mixed with 5,5'-dithio-bis-2-nitrobenzoic acid (DTNB) transported to flow spectrophotometer. Flowing of all materials is realised using peristaltic pump. The method was validated: time for optimal hydratation of the cellophane membrane; type of the membrane; type of dialyzer; conditions for optimal permeation of reaction components; optimization of substrate and DTNB concentrations (linear dependence); efficacy of peristaltic pump; calibration of analytes after permeation through the membrane; excluding of the blood permeation through the membrane. Some examples of the evaluation of the effects of AChE inhibitors are described. It was demonstrated very good uniformity of peaks representing the enzyme activity (good reproducibility); time dependence of AChE inhibition caused by VX in vitro in the rat blood allowing to determine the half life of inhibition and thus, bimolecular rate constants of inhibition; reactivation of inhibited AChE by some reactivators, and continual monitoring of the activity in the whole blood in vivo in intact and VX-intoxicated rats. The method is simple and not expensive, allowing automatic determination of AChE activity in discrete or continual samples in vitro or in vivo. It will be evaluated for further research of cholinesterase inhibitors.
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Affiliation(s)
- Jiri Cabal
- Department of Toxicology, Faculty of Military Health Sciences, University of Defense, Trebesska 1575, 500 01 Hradec Kralove, Czech Republic.
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4
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Zitova A, O'Mahony FC, Kurochkin IN, Papkovsky DB. A Simple Screening Assay for Cholinesterase Activity and Inhibition Based on Optical Oxygen Detection. ANAL LETT 2010. [DOI: 10.1080/00032711003653833] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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5
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Llopis X, Pumera M, Alegret S, Merkoçi A. Lab-on-a-chip for ultrasensitive detection of carbofuran by enzymatic inhibition with replacement of enzyme using magnetic beads. LAB ON A CHIP 2009; 9:213-218. [PMID: 19107276 DOI: 10.1039/b816643a] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this paper an ultrasensitive method to determine toxicity due to pesticides in a glass lab-on-a-chip by means of enzymatic inhibition of acetylcholinesterase immobilised on magnetic beads is described. The reproducible insertion of a controlled amount of enzyme-coupled magnetic beads inside the chip channel and their immobilisation in a capture region with the aid of a magnetic field has been optimised. This procedure enables the easy renewal of the biosensing material after each determination in a highly reproducible manner. Several operational parameters such as the working potential for the selective detection of thiocholine (TCh) on a platinum disc electrode, the TCh detection reproducibility and sensitivity, the electroosmotic flow driving voltage and the inhibition time were also evaluated or optimised. The detection of carbofuran (one of the most toxic carbamate pesticides) has been achieved down to the nanomolar level.
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Affiliation(s)
- Xavier Llopis
- Grup de Sensors i Biosensors, Departament de Química, Edifici C, Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Catalonia, Spain
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6
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Simonian AL, Rainina EI, Wild JR. A New Approach For Discriminative Detection of Organophosphate Neurotoxins in the Presence of Other Cholinesterase Inhibitors. ANAL LETT 2006. [DOI: 10.1080/00032719708001757] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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7
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Luque de Castro MD, Herrera MC. Enzyme inhibition-based biosensors and biosensing systems: questionable analytical devices. Biosens Bioelectron 2003; 18:279-94. [PMID: 12485775 DOI: 10.1016/s0956-5663(02)00175-6] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
An overview of methods based on enzyme inhibition is presented. Both biosensors and biosensing systems (implemented in continuous and discontinuous approaches) are considered. The aim of the overview is to alert users on the use of these devices which, despite they can involve selective biocatalysts, the inhibition effect is not selective. Tables and examples illustrate this assertion.
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Affiliation(s)
- M D Luque de Castro
- Analytical Chemistry Division, Annex C-3 Faculty of Sciences, Campus of Rabanales, University of Córdoba, E-14071 Córdoba, Spain.
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Kok FN, Bozoglu F, Hasirci V. Construction of an acetylcholinesterase-choline oxidase biosensor for aldicarb determination. Biosens Bioelectron 2002; 17:531-9. [PMID: 11959475 DOI: 10.1016/s0956-5663(02)00009-x] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
In this study, acetylcholinesterase and choline oxidase were co-immobilized on poly(2-hydroxyethyl methacrylate) membranes and the change in oxygen consumption upon aldicarb introduction was measured. Immobilization of the enzymes was achieved either by entrapment or by surface attachment via a hybrid immobilization method including epichlorohydrin and Cibacron Blue F36A activation. Immobilized enzymes had a long-storage stability (only 15% activity decrease in 2 months in wet storage and no activity loss in dry storage). Aldicarb detection studies showed that a linear working range of 10-500 and 10-250 ppb aldicarb could be achieved by entrapped and surface immobilized enzymes, respectively. Enzymes immobilized on membrane surfaces responded to aldicarb presence more quickly than entrapped enzymes. Aldicarb concentrations as low as 23 and 12 ppb could be detected by entrapped and surface immobilized enzymes, respectively, in 25 min.
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Affiliation(s)
- Fatma N Kok
- Biotechnology Research Unit, Department of Biological Sciences and Biotechnology, Middle East Technical University, 06531, Ankara, Turkey
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White BJ, Harmon HJ. Interaction of monosulfonate tetraphenyl porphyrin, a competitive inhibitor, with acetylcholinesterase. Biosens Bioelectron 2002; 17:463-9. [PMID: 11959466 DOI: 10.1016/s0956-5663(01)00317-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Monosulfonate tetraphenyl porphyrin (TPPS(1)) forms a 1:1 complex with electric eel acetylcholinesterase (AChE) inducing a loss in TPPS(1) absorbance at 402 nm and the appearance of a new absorbance centered at 442 nm. In the presence of AChE, the fluorescence of TPPS(1) at 652 nm is slightly narrowed, with the maximal 652 nm fluorescence shifted from 407 to 412 nm excitation wavelength. The fluorescence peak of TPPS(1) at 712 nm shifts to 716 nm in the presence of AChE. TPPS(1) is a competitive inhibitor of AChE. The addition of acetylcholine iodide (AChI) or the competitive inhibitor tetracaine to the preformed AChE-TPPS(1) complex results in a loss of the 442 nm absorbance band as the porphyrin is displaced from AChE. The absorbance peak does not decrease in the presence of procaine, a non-competitive inhibitor.
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Affiliation(s)
- Brandy J White
- Department of Physics, Oklahoma State University, Stillwater, OK 74078, USA
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Choi JW, Kim YK, Lee IH, Min J, Lee WH. Optical organophosphorus biosensor consisting of acetylcholinesterase/viologen hetero Langmuir-Blodgett film. Biosens Bioelectron 2001; 16:937-43. [PMID: 11679273 DOI: 10.1016/s0956-5663(01)00213-5] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The fiber-optic biosensor consisting of an acetylcholinesterase (AChE)-immobilized Langmuir-Blodgett (LB) film was developed to detect organophosphorus compounds in contaminated water. The sensing scheme was based on the decrease of yellow product, o-nitrophenol, from a colorless substrate, o-nitrophenyl acetate, due to the inhibition by organophosphorus compounds on AChE. Absorbance change of the product as the output of enzyme reaction was detected and the light was guided through the optical fibers. The enzyme portion of the sensor system was fabricated by the LB technique for formation of the enzyme film. AChE-immobilized LB film was formed by adsorbing the enzyme molecules onto a viologen monolayer using the electrostatic force. The proposed kinetics for irreversible inhibition of organophosphorus compounds on AChE agreed well with the experimental data. The surface topography of AChE-immobilized LB film was investigated by atomic force microscope (AFM). The immobilized AChE had the maximum activity at pH 7. The proposed biosensor could successfully detect the organophosphorus compounds up to 2 ppm and the response time to steady signal of the sensor was about 10 min.
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Affiliation(s)
- J W Choi
- Department of Chemical Engineering, Sogang University, C.P.O. Box 1142, Seoul 100-611, South Korea.
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11
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Selective inhibition-based biosensing system for the determination of pesticides in environmental samples using analytical pervaporation coupled with enzymatic derivatisation. Anal Chim Acta 2000. [DOI: 10.1016/s0003-2670(99)00876-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Xavier MP, Vallejo B, Marazuela MD, Moreno-Bondi MC, Baldini F, Falai A. Fiber optic monitoring of carbamate pesticides using porous glass with covalently bound chlorophenol red. Biosens Bioelectron 2000; 14:895-905. [PMID: 10722147 DOI: 10.1016/s0956-5663(99)00066-4] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
An optical fiber biosensor for the determination of the pesticides propoxur (Baygon) and carbaryl, two of the most commonly used carbamate insecticides in vegetable crops, is described. A pH indicator, chlorophenol red, is used as optical transducer of the inhibition of the enzyme acetylcholinesterase by the analytes. The biorecognition element is covalently immobilized onto controlled pore glass beads (CPG) and packed in a thermostatized bioreactor connected to a flow-through cell that contains CPG-immobilized chlorophenol red placed at the common end of a bifurcated fiber optic bundle. In the presence of a constant acetylcholine concentration, the colour of the pH sensitive layer changes and the measured reflectance signal can be related to the carbamate concentration in the sample solution. The performance of the biosensor has been optimized using a flow injection system. The linear dynamic range for the determination of carbaryl and propoxur spans from 0.8 to 3.0 mg l(-1) and from 0.03 to 0.50 mg l(-1), respectively. The detection limit (3 s) of the biosensor for propoxur (0.4 ng) is lower than that measured for carbaryl (25 ng). Reproducibility, stability and interference studies of the optical device are reported. The biosensor has been applied to the determination of propoxur in spiked vegetables (onion and lettuce) using ultrasound extraction, achieving recovery values between 93 and 95% for onion samples at the different concentration levels assayed.
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Affiliation(s)
- M P Xavier
- Department of Organic Chemistry Laboratory of Applied Photochemistry, Faculty of Chemistry, Universidad Complutense de Madrid, Spain
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Dziri L, Desbat B, Leblanc RM. Polarization-Modulated FT-IR Spectroscopy Studies of Acetylcholinesterase Secondary Structure at the Air−Water Interface. J Am Chem Soc 1999. [DOI: 10.1021/ja990099d] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Leila Dziri
- Contribution from Centre for Supramolecular Science, Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146-0431; and Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351 Cours de la Libération, 33405 Talence, France
| | - Bernard Desbat
- Contribution from Centre for Supramolecular Science, Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146-0431; and Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351 Cours de la Libération, 33405 Talence, France
| | - Roger M. Leblanc
- Contribution from Centre for Supramolecular Science, Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146-0431; and Laboratoire de Physico-Chimie Moléculaire, Université Bordeaux I, 351 Cours de la Libération, 33405 Talence, France
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Almuaibed AM, Townshend A. Flow injection chemiluminescence determination of ornithine and sequential determination of ornithine and lysine by using immobilized lysine oxidase. Anal Chim Acta 1999. [DOI: 10.1016/s0003-2670(98)00455-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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15
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16
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Ghous T, Townshend A. Flow injection determination of neostigmine and galanthamine by immobilised acetylcholinesterase inhibition. Anal Chim Acta 1998. [DOI: 10.1016/s0003-2670(98)00385-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Choi JW, Min J, Lee WH. Signal analysis of fiber-optic biosensor for the detection of organophosphorus compounds in the contaminated water. KOREAN J CHEM ENG 1997. [DOI: 10.1007/bf02706068] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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18
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Almuaibed AM, Townshend A. Flow injection amperometric and chemiluminescence individual and simultaneous determination of lysine and glucose with immobilized lysine oxidase and glucose oxidase. Anal Chim Acta 1997. [DOI: 10.1016/s0003-2670(96)00439-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Shi R, Stein K. Flow injection analysis of paraoxon with the use of an immobilized acetylcholinesterase reactor. Anal Chim Acta 1996. [DOI: 10.1016/0003-2670(96)00018-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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22
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Günther A, Bilitewski U. Characterisation of inhibitors of acetylcholinesterase by an automated amperometric flow-injection system. Anal Chim Acta 1995. [DOI: 10.1016/0003-2670(94)00352-m] [Citation(s) in RCA: 65] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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23
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Marcos J, Townshend A. Studies on the inhibition of immobilised alkaline phosphatase by metal ions and EDTA in a flow-injection system. Anal Chim Acta 1994. [DOI: 10.1016/0003-2670(94)00329-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Reactivation of an immobilized enzyme reactor for the determination of acetylcholinesterase inhibitors Flow injection determination of paraoxon. Anal Chim Acta 1994. [DOI: 10.1016/0003-2670(94)80234-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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