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Zhang Y, Zhao G, Zheng M, Hu T, Yang C, Xu C. A nanometallic conductive composite-hydrogel core-shell microneedle skin patch for real-time monitoring of interstitial glucose levels. NANOSCALE 2023; 15:16493-16500. [PMID: 37795965 DOI: 10.1039/d3nr01245j] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/06/2023]
Abstract
A microneedle-based skin patch system allows the minimally invasive extraction of skin interstitial fluid, which offers hope for the realization of quantitative and non-invasive diagnosis/monitoring of biological/physiological signals (biomarkers) in the human body. This work describes a nanometallic conductive composite-hydrogel core-shell microneedle skin patch that can realize minimally invasive real-time monitoring of physiological signals. The microneedle sensing system contains an inner conductive silver paste core and an outer bioactive hydrogel layer. The inner core is coated with biomarker-specific enzymes while the outer hydrogel layer extracts the biomarkers from the skin interstitial fluid. This patch can be integrated with the commercial signal processing and transmission modules and enable real-time monitoring. Taking glucose as a model biomarker, we confirm the function and potential application of this core-shell microneedle patch for transdermal diagnosis. It is proven that the core-shell microneedle patch can quickly extract skin interstitial fluid within 30 seconds and has a fast and linear response to glucose concentrations from 0 to 21 mM with a correlation coefficient of 0.9970, which may pave the way for the future development of smart wearable devices with minimally invasive transdermal biosensors.
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Affiliation(s)
- Yuyue Zhang
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
| | - Guangyao Zhao
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
- Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen City, Guangdong Province, China.
| | - Mengjia Zheng
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
| | - Tianli Hu
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
| | - Cheng Yang
- Institute of Materials Research, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen City, Guangdong Province, China.
| | - Chenjie Xu
- Department of Biomedical Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China.
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2
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Hübner H, Candeago R, Schmitt D, Schießer A, Xiong B, Gallei M, Su X. Synthesis and covalent immobilization of redox-active metallopolymers for organic phase electrochemistry. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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3
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Ferrocene-Modified Polyelectrolyte Film-Coated Electrode and Its Application in Glucose Detection. Polymers (Basel) 2019; 11:polym11030551. [PMID: 30960536 PMCID: PMC6473894 DOI: 10.3390/polym11030551] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 03/07/2019] [Accepted: 03/08/2019] [Indexed: 02/01/2023] Open
Abstract
A polyelectrolyte film-coated electrode for the quantitative detection of glucose was reported. Carbon nanotubes, graphene oxide and polyelectrolyte with a ferrocenyl group were used to modify an enzyme electrode to facilitate the electron transfer between glucose oxidase and the electrode. Cyclic voltammetry and amperometric methods were adopted to investigate the effects of different polyelectrolytes and carbon nanomaterials on the electrochemical properties of enzyme electrodes. The results indicate that the ferrocenyl groups on a polyelectrolyte skeleton act as a mediator between the redox center of glucose oxidase and the electrode, which efficiently enhances the electron transfer between a glassy carbon electrode and glucose oxidase. The calibration curve of the sensor shows a linear range from 0.2 to 5 mM for glucose response. The sensor can achieve 95% of the steady-state current within 10 s. The electrodes also present high operational stability and long-term storage stability.
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4
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Rüttiger C, Appold M, Didzoleit H, Eils A, Dietz C, Stark RW, Stühn B, Gallei M. Structure Formation of Metallopolymer-Grafted Block Copolymers. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b00577] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Christian Rüttiger
- Ernst-Berl-Institute
for Chemical Engineering and Macromolecular Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 4, D-64287 Darmstadt, Germany
| | - Michael Appold
- Ernst-Berl-Institute
for Chemical Engineering and Macromolecular Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 4, D-64287 Darmstadt, Germany
| | - Haiko Didzoleit
- Institute
of Condensed Matter Physics, Technische Universität Darmstadt, Hochschulstraße 8, D-64289 Darmstadt, Germany
| | - Adjana Eils
- Center
of Smart Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Str.
16, D-64287 Darmstadt, Germany
- Physics
of Surfaces, Institute of Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 2, D-64287 Darmstadt, Germany
| | - Christian Dietz
- Center
of Smart Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Str.
16, D-64287 Darmstadt, Germany
- Physics
of Surfaces, Institute of Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 2, D-64287 Darmstadt, Germany
| | - Robert W. Stark
- Center
of Smart Interfaces, Technische Universität Darmstadt, Alarich-Weiss-Str.
16, D-64287 Darmstadt, Germany
- Physics
of Surfaces, Institute of Materials Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 2, D-64287 Darmstadt, Germany
| | - Bernd Stühn
- Institute
of Condensed Matter Physics, Technische Universität Darmstadt, Hochschulstraße 8, D-64289 Darmstadt, Germany
| | - Markus Gallei
- Ernst-Berl-Institute
for Chemical Engineering and Macromolecular Science, Technische Universität Darmstadt, Alarich-Weiss-Str. 4, D-64287 Darmstadt, Germany
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5
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Increasing performance and stability of mass-manufacturable biobatteries by ink modification. SENSING AND BIO-SENSING RESEARCH 2015. [DOI: 10.1016/j.sbsr.2015.03.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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6
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BAş SALIHZEKI, GüLCE HANDAN, YILDIZ SALIH. Hypoxanthine Biosensor Based on Immobilization of Xanthine Oxidase on Modified Pt Electrode and Its Application for Fish Meat. INT J POLYM MATER PO 2014. [DOI: 10.1080/00914037.2013.854215] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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7
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Plamper FA. Changing Polymer Solvation by Electrochemical Means: Basics and Applications. POROUS CARBONS – HYPERBRANCHED POLYMERS – POLYMER SOLVATION 2014. [DOI: 10.1007/12_2014_284] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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8
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Low-temperature fabrication of ZnO nanorods/ferrocenyl–alkanethiol bilayer electrode and its application for enzymatic glucose detection. Biosens Bioelectron 2014; 51:362-5. [DOI: 10.1016/j.bios.2013.08.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Revised: 07/20/2013] [Accepted: 08/05/2013] [Indexed: 11/18/2022]
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9
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Arslan F, Beskan U. An amperometric biosensor for glucose detection from glucose oxidase immobilized in polyaniline-polyvinylsulfonate-potassium ferricyanide film. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2013; 42:284-8. [PMID: 23822885 DOI: 10.3109/21691401.2013.812650] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
In this study, a novel amperometric glucose biosensor with immobilization of glucose oxidase on electrochemically polymerized polyaniline-polyvinylsulphonate-potassium ferricyanide (Pani-Pvs-Fc) films has been accomplished via the entrapment technique. Potassium ferricyanide was used as the mediator. Determination of glucose was carried out by the oxidation of potassium ferrocyanide at 0.3 V vs. Ag/AgCl. The effects of pH and temperature were investigated, and the optimum pH value was found to be 7.5. The storage stability and the operational stability of the enzyme electrode were also studied.
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Affiliation(s)
- Fatma Arslan
- Department of Chemistry, Faculty of Sciences, Gazi University , Ankara , Türkiye
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10
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Elbert J, Mersini J, Vilbrandt N, Lederle C, Kraska M, Gallei M, Stühn B, Plenio H, Rehahn M. Reversible Activity Modulation of Surface-Attached Grubbs Second Generation Type Catalysts Using Redox-Responsive Polymers. Macromolecules 2013. [DOI: 10.1021/ma4007126] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Johannes Elbert
- Ernst-Berl Institute for Chemical Engineering and Macromolecular
Science, Darmstadt University of Technology, Petersenstraße 22, D-64287 Darmstadt, Germany
| | - Jetmire Mersini
- Organometallic Chemistry, Darmstadt University of Technology, Petersenstraße
18, D-64287 Darmstadt, Germany
| | - Nicole Vilbrandt
- Ernst-Berl Institute for Chemical Engineering and Macromolecular
Science, Darmstadt University of Technology, Petersenstraße 22, D-64287 Darmstadt, Germany
| | - Christina Lederle
- Institute of Condensed Matter Physics, Darmstadt University of Technology, Hochschulstraße 8, D-64289 Darmstadt,
Germany
| | - Martin Kraska
- Institute of Condensed Matter Physics, Darmstadt University of Technology, Hochschulstraße 8, D-64289 Darmstadt,
Germany
| | - Markus Gallei
- Ernst-Berl Institute for Chemical Engineering and Macromolecular
Science, Darmstadt University of Technology, Petersenstraße 22, D-64287 Darmstadt, Germany
| | - Bernd Stühn
- Institute of Condensed Matter Physics, Darmstadt University of Technology, Hochschulstraße 8, D-64289 Darmstadt,
Germany
| | - Herbert Plenio
- Organometallic Chemistry, Darmstadt University of Technology, Petersenstraße
18, D-64287 Darmstadt, Germany
| | - Matthias Rehahn
- Ernst-Berl Institute for Chemical Engineering and Macromolecular
Science, Darmstadt University of Technology, Petersenstraße 22, D-64287 Darmstadt, Germany
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11
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Meredith MT, Hickey DP, Redemann JP, Schmidtke DW, Glatzhofer DT. Effects of ferrocene methylation on ferrocene-modified linear poly(ethylenimine) bioanodes. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.01.006] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Polyvinylferrocenium based platinum electrodeposited amperometric biosensors for lysine detection. J Electroanal Chem (Lausanne) 2013. [DOI: 10.1016/j.jelechem.2012.11.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Mazurowski M, Gallei M, Li J, Didzoleit H, Stühn B, Rehahn M. Redox-Responsive Polymer Brushes Grafted from Polystyrene Nanoparticles by Means of Surface Initiated Atom Transfer Radical Polymerization. Macromolecules 2012. [DOI: 10.1021/ma3020195] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Markus Mazurowski
- Ernst-Berl
Institute for Chemical Engineering and Macromolecular Science, Darmstadt University of Technology, Petersenstraße
22, D-64287 Darmstadt, Germany
| | - Markus Gallei
- Ernst-Berl
Institute for Chemical Engineering and Macromolecular Science, Darmstadt University of Technology, Petersenstraße
22, D-64287 Darmstadt, Germany
| | - Junyu Li
- Institute of Condensed Matter Physics, Darmstadt University of Technology, Hochschulstraße 8, D-64289 Darmstadt,
Germany
| | - Haiko Didzoleit
- Institute of Condensed Matter Physics, Darmstadt University of Technology, Hochschulstraße 8, D-64289 Darmstadt,
Germany
| | - Bernd Stühn
- Institute of Condensed Matter Physics, Darmstadt University of Technology, Hochschulstraße 8, D-64289 Darmstadt,
Germany
| | - Matthias Rehahn
- Ernst-Berl
Institute for Chemical Engineering and Macromolecular Science, Darmstadt University of Technology, Petersenstraße
22, D-64287 Darmstadt, Germany
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14
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Staff RH, Gallei M, Mazurowski M, Rehahn M, Berger R, Landfester K, Crespy D. Patchy nanocapsules of poly(vinylferrocene)-based block copolymers for redox-responsive release. ACS NANO 2012; 6:9042-9049. [PMID: 23020219 DOI: 10.1021/nn3031589] [Citation(s) in RCA: 152] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Nanocapsules composed of a poly(vinylferrocene)-block-poly(methyl methacrylate) shell and a hydrophobic liquid core are prepared in water. The nanocapsule shells display a patchy structure with poly(vinylferrocene) patches with sizes of 25 ± 3 nm surrounded by poly(methyl methacrylate). The functional nanopatches can be selectively oxidized, thereby influencing the colloidal morphology and introducing polar domains in the nanocapsule shell. The hydrophobic to hydrophilic transition in the redox-responsive nanopatches can be advantageously used to release a hydrophobic payload encapsulated in the core by an oxidation reaction.
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Affiliation(s)
- Roland H Staff
- Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany
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15
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Tonhauser C, Mazurowski M, Rehahn M, Gallei M, Frey H. Water-Soluble Poly(vinylferrocene)-b-Poly(ethylene oxide) Diblock and Miktoarm Star Polymers. Macromolecules 2012. [DOI: 10.1021/ma3000048] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christoph Tonhauser
- Institute of Organic Chemistry,
Organic and Macromolecular Chemistry, Johannes Gutenberg-University (JGU), Duesbergweg 10-14, D-55099 Mainz, Germany
| | - Markus Mazurowski
- Ernst-Berl Institute for Chemical
Engineering and Macromolecular Science, Darmstadt University of Technology, Petersenstraße 22, D-64287 Darmstadt,
Germany
| | - Matthias Rehahn
- Ernst-Berl Institute for Chemical
Engineering and Macromolecular Science, Darmstadt University of Technology, Petersenstraße 22, D-64287 Darmstadt,
Germany
| | - Markus Gallei
- Ernst-Berl Institute for Chemical
Engineering and Macromolecular Science, Darmstadt University of Technology, Petersenstraße 22, D-64287 Darmstadt,
Germany
| | - Holger Frey
- Institute of Organic Chemistry,
Organic and Macromolecular Chemistry, Johannes Gutenberg-University (JGU), Duesbergweg 10-14, D-55099 Mainz, Germany
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16
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Pelster LN, Meredith MT, Minteer SD. Nicotinamide Adenine Dinucleotide Oxidation Studies at Multiwalled Carbon Nanotube/Polymer Composite Modified Glassy Carbon Electrodes. ELECTROANAL 2012. [DOI: 10.1002/elan.201200045] [Citation(s) in RCA: 8] [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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17
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References. Anal Chem 2012. [DOI: 10.1201/b11478-14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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18
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Danaee I, Jafarian M, Forouzandeh F, Gobal F. Kinetic studies of glucose electrocatalytic oxidation on GC/Ni electrode. INT J CHEM KINET 2012. [DOI: 10.1002/kin.20721] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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19
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Viswanathan S, Li P, Choi W, Filipek S, Balasubramaniam TA, Renugopalakrishnan V. Protein-carbon nanotube sensors: single platform integrated micro clinical lab for monitoring blood analytes. Methods Enzymol 2012; 509:165-94. [PMID: 22568906 DOI: 10.1016/b978-0-12-391858-1.00010-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Design of a unique, single-platform, integrated, multichannel sensor based on carbon nanotube (CNT)-protein adducts specific to each one of the major analytes of blood, glucose, cholesterol, triglyceride, and Hb1AC is presented. The concept underlying the sensor, amperometric detection, is applicable to various disease-monitoring strategies. There is an urgent need to enhance the sensitivity of glucometers to <5% level instead of greater than the present 15% standard in these detectors. CNTs enhance the signals derived from the interaction of the enzymes with the different analytes in blood. Fabricated sensors using the new methodology is a point-of-care device that is targeted for home, clinical, and emergency use and can be redesigned for continuous monitoring for critical care patients.
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Affiliation(s)
- Sowmya Viswanathan
- Newton-Wellesley Hospital/Partners Healthcare System, Newton, Massachusetts, USA
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20
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Amperometric xanthine biosensors based on electrodeposition of platinum on polyvinylferrocenium coated Pt electrode. ACTA ACUST UNITED AC 2011. [DOI: 10.1016/j.molcatb.2011.06.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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21
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Wu Q, Wang L, Yu H, Wang J, Chen Z. Organization of glucose-responsive systems and their properties. Chem Rev 2011; 111:7855-75. [PMID: 21902252 DOI: 10.1021/cr200027j] [Citation(s) in RCA: 231] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Qian Wu
- State Key Laboratory of Chemical Engineering, Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, People's Republic of China
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22
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Jena BK, Percival SJ, Zhang B. Au Disk Nanoelectrode by Electrochemical Deposition in a Nanopore. Anal Chem 2010; 82:6737-43. [DOI: 10.1021/ac101261m] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Bikash Kumar Jena
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700
| | - Stephen J. Percival
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700
| | - Bo Zhang
- Department of Chemistry, University of Washington, Seattle, Washington 98195-1700
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Abstract
Aging is associated with a progressive decline of muscle mass, strength, and quality, a condition described as sarcopenia of aging. Despite the significance of skeletal muscle atrophy, the mechanisms responsible for the deterioration of muscle performance are only partially understood. The purpose of this review is to highlight cellular, molecular, and biochemical changes that contribute to age-related muscle dysfunction.
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Affiliation(s)
- LaDora V Thompson
- Department of Physical Medicine and Rehabilitation, University of Minnesota, MMC 388, 420 Delaware Street, S.E., Minneapolis, MN 55455, USA.
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24
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Li L, Sheng Q, Zheng J, Zhang H. Facile and controllable preparation of glucose biosensor based on Prussian blue nanoparticles hybrid composites. Bioelectrochemistry 2008; 74:170-5. [DOI: 10.1016/j.bioelechem.2008.07.006] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2007] [Revised: 06/13/2008] [Accepted: 07/24/2008] [Indexed: 11/30/2022]
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25
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Robinson KL, Lawrence NS. Vinylferrocene homopolymer and copolymers: an electrochemical comparison. ANAL SCI 2008; 24:339-43. [PMID: 18332540 DOI: 10.2116/analsci.24.339] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Poly(vinylferrocene) (pVFc) homopolymer was synthesized by free radical polymerization, along with a series of pVFc-based copolymers containing either styrene, vinylanthracene or methylmethacrylate. This report details the electrochemical experiments conducted to examine the stability of the various pVFc based polymers, which is shown to be critically dependent on the extent of copolymerization. A trend was found that when the concentration of co-monomer was decreased, electrochemical stability was enhanced. Furthermore incorporation of a second monomer into the polymer chain produced a profound effect on the scan rate behaviour of the vinylferrocene moiety. As the concentration of co-monomer was decreased, the behaviour tended towards that of a diffusion controlled process. These results are of vital significance for the development of pVFc-based electrochemical sensors.
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Affiliation(s)
- Kay L Robinson
- Schlumberger Cambridge Research, High Cross, Cambridge, CB3 0EL, UK
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26
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Glucose sensor based on nano-baskets of tin oxide templated in porous alumina by plasma enhanced CVD. Biosens Bioelectron 2008; 23:1838-42. [DOI: 10.1016/j.bios.2008.02.022] [Citation(s) in RCA: 67] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2007] [Revised: 01/22/2008] [Accepted: 02/25/2008] [Indexed: 11/24/2022]
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27
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Ma S, Lu W, Mu J, Li J, Jiang L. Effect of Immobilization Supports on the Amperometric Response of Silver Nanoparticles Enhanced Glucose Oxidase Electrodes. J DISPER SCI TECHNOL 2008. [DOI: 10.1080/01932690701688888] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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28
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Fugere NA, Ferrington DA, Thompson LV. Protein nitration with aging in the rat semimembranosus and soleus muscles. J Gerontol A Biol Sci Med Sci 2006; 61:806-12. [PMID: 16912096 PMCID: PMC2692712 DOI: 10.1093/gerona/61.8.806] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
On the basis of the accelerated age-related effects in type II muscle, we hypothesized that with aging the semimembranosus (type II) muscle would accumulate a greater amount of oxidized proteins compared to proteins in the soleus (type I) muscle. In this study, 3-nitrotyrosine (3-NT) was used as a stable marker of protein oxidative damage. The presence of 3-NT was evaluated in muscles from young adult, old, and very old Fischer 344 rats to provide an indication of the time course of muscle protein oxidative damage. A significant age-associated increase in nitrotyrosine-modified proteins was observed. The modified proteins identified by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF) mass spectrometry include the sarcoplasmic reticulum Ca(+2)-ATPase, aconitase, beta-enolase, triosephosphate isomerase, and carbonic anhydrase III. These proteins, involved in metabolism and calcium homeostasis, exhibited an age-dependent increase in 3-NT content in both muscles. However, significant levels of 3-NT modification were present at an earlier age in the semimembranosus muscle.
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Affiliation(s)
- Nicole A. Fugere
- Department of Physical Medicine and Rehabilitation, University of Minnesota, Minneapolis
| | | | - LaDora V. Thompson
- Department of Physical Medicine and Rehabilitation, University of Minnesota, Minneapolis
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29
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Zhang F, Cho S, Yang S, Seo S, Cha G, Nam H. Gold Nanoparticle-Based Mediatorless Biosensor Prepared on Microporous Electrode. ELECTROANAL 2006. [DOI: 10.1002/elan.200503401] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Gülce A, Gülce H. Polyvinylferrocenium modified Pt electrode for anaerobic glucose monitoring. ACTA ACUST UNITED AC 2005; 62:81-92. [PMID: 15656946 DOI: 10.1016/j.jbbm.2004.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2004] [Accepted: 09/29/2004] [Indexed: 10/26/2022]
Abstract
An amperometric enzyme electrode for the determination of glucose under anaerobic solution conditions was developed by immobilizing glucose oxidase and then by adsorbing ferrocene in polyvinylferrocenium matrix coated on a Pt electrode surface. The amperometric response due to the electrooxidation of ferrocene that the reduced flavin adenine dinucleotide centers of glucose oxidase was measured at a constant potential. The response characteristics of the enzyme electrode were investigated. The effects of the thickness of the polymeric film, the amount of the enzyme immobilized, the amount of the mediator, the glucose concentration, the applied potential, operating pH and temperature on the response of the enzyme electrode were studied. The response time and the optimum pH were found to be 30-40 s and pH 7.4 at 25 degrees C, respectively. The linear response was observed up to 5.0 mM glucose concentration that the produced detectable current was 0.0075 mM glucose concentration. The activation energy (E(a)) of immobilized enzyme reaction was calculated to be 41.3 kJ mol(-1) from the Arrhenius plot. The apparent Michaelis-Menten constant (K(Mapp)) was found to be 6.05 mM glucose according to the Lineweaver-Burk graph of the Michaelis-Menten equation under the optimum conditions. The interference signal due to the most common electrochemical interfering species was also evaluated.
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Affiliation(s)
- Ahmet Gülce
- Department of Chemical Engineering, Selçuk University, 42031 Konya, Turkey.
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Chapter 3 Enzyme biosensors containing polymeric electron transfer systems. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s0166-526x(05)44003-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
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Zhang FF, Wan Q, Wang XL, Sun ZD, Zhu ZQ, Xian YZ, Jin LT, Yamamoto K. Amperometric sensor based on ferrocene-doped silica nanoparticles as an electron transfer mediator for the determination of glucose in rat brain coupled to in vivo microdialysis. J Electroanal Chem (Lausanne) 2004. [DOI: 10.1016/j.jelechem.2004.04.019] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Oms O, Le Bideau J, Leroux F, van der Lee A, Leclercq D, Vioux A. Mixed 1D−2D Inorganic Polymeric Zinc Ferrocenylphosphonate: Crystal Structure and Electrochemical Study. J Am Chem Soc 2004; 126:12090-6. [PMID: 15382944 DOI: 10.1021/ja049457p] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Needs for ferrocene immobilization on robust host structures are considerable since derivative materials may find applications in medical areas, optical devices, or catalysis. Synthesis of phosphonate functionalized ferrocene allowed its subsequent inorganic polymerization with a zinc salt. The crystallographic structure of the compound obtained, Zn(HO(3)PFc)(2).2H(2)O, shows a unique two-dimensional ferrocene arrangement anchored on a one-dimensional Zn-O-P-O-Zn backbone. The ferrocene packing in the title compound is very similar to the packing found in molecular ferrocene. The electroactivity of Zn(HO(3)PFc)(2).2H(2)O is thoroughly studied. It shows a reversible surface oxidation of ferrocene. Mössbauer spectroscopy for the oxidized compound shows an isomer shift of IS(2b) = 0.432 mm x s(-1) and a quadrupolar splitting of QS(2b) = 0.205 mm x s(-1), which is consistent with a stable S = 1/2 ferrocenium state. The magnetic susceptibility study, Mössbauer spectroscopy, and galvanostatic titration show that only the ferrocene moieties present at the surface of the crystallites are reversibly oxidized. This observation is reinforced by a complex impedance study showing mainly resistive behavior and conductivity measurements indicating weak, thermally assisted, conductivity. The general properties of this compound demonstrate that phosphonato functionalization may be a useful approach for all fields concerned by immobilization of ferrocene.
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Affiliation(s)
- Olivier Oms
- Laboratoire de Chimie Moléculaire et Organisation du Solide, UMR 5637, Université Montpellier II, CC 007, Place Eugène Bataillon, 34095 Montpellier Cedex 05, France
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