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Mattiasson B, Ertürk G. Why Using Molecularly Imprinted Polymers in Connection to Biosensors? SENSORS 2017; 17:s17020246. [PMID: 28134817 PMCID: PMC5336002 DOI: 10.3390/s17020246] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 01/19/2017] [Indexed: 01/15/2023]
Affiliation(s)
- Bo Mattiasson
- CapSenze Biosystems AB, Scheelevägen 22, 22363 Lund, Sweden.
- Department of Biotechnology, Lund University, Box 117, 221 00 Lund, Sweden.
| | - Gizem Ertürk
- CapSenze Biosystems AB, Scheelevägen 22, 22363 Lund, Sweden.
- Department of Biotechnology, Lund University, Box 117, 221 00 Lund, Sweden.
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Bertrand C, Coulet PR, Gautheron DC. Enzyme Electrode with Collagen-Immobilized Cholesterol Oxidase for the Microdetermination of Free Cholesterol. ANAL LETT 2007. [DOI: 10.1080/00032717908082547] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Schär HP, Ghisalba O. Hyphomicrobium bacterial electrode for determination of monomethyl sulfate. Biotechnol Bioeng 2004; 27:897-901. [DOI: 10.1002/bit.260270623] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fermi P, Biffi R, Conti V, Ramoni R, Grolli S, Accornero P, Bignetti E. Single turnover mechanism of a trypsin-reactor with high enzyme concentration. J Biotechnol 1998; 60:81-95. [PMID: 9571804 DOI: 10.1016/s0168-1656(97)00189-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
A small column containing 2 mM CH-Sepharose 4B-immobilized trypsin was connected to a flow injection device equipped for potentiometric measurements (0.01-2 mM protons) and for post-column analysis by spectrophotometry and capillary electrophoresis (CE). The device was engaged with N alpha-benzoyl-L-arginine pNO2-anilide (BAPNA), beta-lactoglobulin (beta-Lac) and peptides of V8-protease predigested beta-Lac. At a given flow rate, the reaction with BAPNA or beta-Lac (below 2 mM) produced about 1 proton per substrate molecule in each sample (linear relation to substrate amount); with peptides (below 22 mM), the reaction did not exceed 0.17 acid equivalents per substrate molecule (hyperbolic dependence). Final experiments demonstrated that the reactor gave a correct estimate of available lysine in peptides of beta-Lac modified with 5-nitrosalicylaldehyde. The data could be predicted by a kinetic model describing the reactor performance in 'single turnover' conditions. The interplay between resident time and the non-catalytic amount of trypsin prevented each enzyme molecule from recycling as well as each substrate molecule (containing one or more cleavage sites) from encountering the enzyme more than once. In conclusion, both from the experimental and the theoretical point of view, this work permitted the analysis of trypsin behaviour in some extreme working conditions and indicates how to modulate the performance of an endoprotease-based reactor. A brief discussion on potential applications in protein mapping and tagging and in the quantitative analysis of protein bioavailability by means of a biosensorial strategy is also described.
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Affiliation(s)
- P Fermi
- Istituto di Biochimica Veterinaria, Università di Parma, Italy
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Nakazono K, Watanabe N, Matsuno K, Sasaki J, Sato T, Inoue M. Does superoxide underlie the pathogenesis of hypertension? Proc Natl Acad Sci U S A 1991; 88:10045-8. [PMID: 1658794 PMCID: PMC52864 DOI: 10.1073/pnas.88.22.10045] [Citation(s) in RCA: 567] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Although active oxygen species play important roles in the pathogenesis of various diseases, the molecular mechanism for oxygen toxicity in vascular diseases remains to be elucidated. Since endothelium-derived relaxing factor (EDRF) is inactivated by superoxide radicals in vitro, oxidative stress in and around vascular endothelial cells may affect the circulatory status of animals. To study the role of superoxide radicals and related enzymes, such as superoxide dismutase (SOD), in vascular diseases, we have developed a fusion protein (HB-SOD) consisting of human Cu/Zn-type SOD and a C-terminal basic peptide with high affinity for heparan sulfate on endothelial cells. When injected intravenously, HB-SOD bound to vascular endothelial cells, underwent transcellular transport, and localized within vascular walls by a heparin-inhibitable mechanism. The blood pressure of spontaneously hypertensive rats (SHR) but not normal animals was decreased significantly by HB-SOD. Heparin inhibited the depressor effect of HB-SOD. In contrast, native SOD had no effect on blood pressure of either SHR or normal rats. Neither H2O2-inactivated HB-SOD nor the C-terminal heparin-binding peptide showed such a depressor effect, suggesting that the catalytic function of HB-SOD is responsible for its depressor action. To know the source of superoxide radicals, we determined xanthine oxidase activity in the aorta and uric acid levels in the plasma. Although no appreciable difference in xanthine oxidase activity was found between the two animal groups, uric acid levels were significantly higher in SHR than in normal rats. Oxypurinol, a potent inhibitor of xanthine oxidase, also decreased the blood pressure of SHR but not of normal rats. These findings indicate that superoxide radicals in and around vascular endothelial cells play critical roles in the pathogenesis of hypertension of SHR.
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Affiliation(s)
- K Nakazono
- Department of Biochemistry, Kumamoto University Medical School, Japan
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Hariti A, Cherruault Y. Stability and bifurcation of a reaction-diffusion system. INTERNATIONAL JOURNAL OF BIO-MEDICAL COMPUTING 1991; 29:77-94. [PMID: 1757166 DOI: 10.1016/0020-7101(91)90001-u] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In this paper we study the stability and bifurcation of partial differential equations derived from enzyme immobilisation modelling. Sufficient mathematical conditions ensuring stability and bifurcation are obtained.
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Affiliation(s)
- A Hariti
- Université Paris 6, Laboratoire MEDIMAT, France
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Raghavan KG, Devasagayam TPA, Ramakrishnan V. Immobilized-Enzyme Brushes for Clinical Analyses: Urea Determination. ANAL LETT 1986. [DOI: 10.1080/00032718608066249] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Rasche und genaue Bestimmung von Ethanol mittels einer Oxidase-Elektrode in einem Str�mungs-Injektions-System. ACTA ACUST UNITED AC 1983. [DOI: 10.1007/bf01042198] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Sharma BP, Bailey LF, Messing RA. Immobilized Biomaterials?Techniques and Applications. ACTA ACUST UNITED AC 1982. [DOI: 10.1002/anie.198208371] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Mattiasson B, Larsson PO, Lindahl L, Sahlin P. Vitamin analysis with use of a yeast electrode. Enzyme Microb Technol 1982. [DOI: 10.1016/0141-0229(82)90107-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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A liposome-based assay for quantitation of detergents. Appl Biochem Biotechnol 1982; 7:81-4. [DOI: 10.1007/bf02798628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/18/1981] [Indexed: 10/22/2022]
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Mattiasson B, Danielsson B, Winquist F, Nilsson H, Mosbach K. Enzyme Thermistor Analysis of Penicillin in Standard Solutions and in Fermentation Broth. Appl Environ Microbiol 1981; 41:903-8. [PMID: 16345754 PMCID: PMC243830 DOI: 10.1128/aem.41.4.903-908.1981] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Immobilized penicillinase was applied in an enzyme thermistor for calorimetric analysis of samples containing penicillin G. Standard solutions as well as extracts from fermentation broth were analyzed. The enzyme was applied bound either to porous glass or, when dealing with crude preparations, to the inner surface of nylon tubing. In the fermentation system studied, high concentrations of penicillin were present, thus allowing dilution to reduce the influence of the composition of the medium on the analysis. The useful linear concentration range was from 0.1 to 100 mM. The coefficient of correlation between analytical results obtained with the present method and those from conventional assays was 0.997.
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Affiliation(s)
- B Mattiasson
- Pure and Applied Biochemistry, Chemical Center, University of Lund, S-220 07 Lund 7, Sweden
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Enfors SO. Oxygen-stabilized enzyme electrode for d-glucose analysis in fermentation broths. Enzyme Microb Technol 1981. [DOI: 10.1016/0141-0229(81)90031-4] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Gerig JT, Loehr DT. Fluorine nmr studies of poly(N-acryloyl-?-alanine)-?-chymotrypsin conjugates. Biopolymers 1980. [DOI: 10.1002/bip.1980.360191011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Romette JL, Froment B, Thomas D. Glucose-oxidase electrode. Measurements of glucose in samples exhibiting high variability in oxygen content. Clin Chim Acta 1979; 95:249-53. [PMID: 527223 DOI: 10.1016/0009-8981(79)90366-8] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Measurements of glucose in samples exhibiting high variability in oxygen content present an important problem to solve for pO2 detection methods. Different solutions exist, all based on the stabilization of the pO2 sample before or during the measurement. The electrode described in this paper itself contains enough O2 to compensate for the variability of the sample oxygen content. The enzyme is cross-linked with gelatin using the bifunctional agent, glutaraldehyde. Amperometric enzyme electrodes have been constructed using these membranes. Measurements have been done by collecting the derivative in time of the signal given by the electrode for blood or plasma samples.
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Durand P, David A, Thomas D. An enzyme electrode for acetylcholine. BIOCHIMICA ET BIOPHYSICA ACTA 1978; 527:277-81. [PMID: 31185 DOI: 10.1016/0005-2744(78)90278-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A new enzyme electrode is described to measure continuously acetylcholine concentration. A coating containing active acetylcholinesterase is produced on a pH-glass electrode. The mean thickness of the coating is 50 micrometer. Optimal operational conditions with respect to buffer concentration, ionic strength, linearity, stability, sensitivity, pH of the bulk solution, and response time are studied and discussed. The use of acetylcholinesterase-containing membranes as sensors could offer several novel advantages.
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