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Hettiarachchi P, Niyangoda S, Shigemoto A, Solowiej IJ, Burdette SC, Johnson MA. Caged Zn 2+ Photolysis in Zebrafish Whole Brains Reveals Subsecond Modulation of Dopamine Uptake. ACS Chem Neurosci 2024; 15:772-782. [PMID: 38301116 PMCID: PMC11036533 DOI: 10.1021/acschemneuro.3c00668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024] Open
Abstract
Free, ionic zinc (Zn2+) modulates neurotransmitter dynamics in the brain. However, the sub-s effects of transient concentration changes of Zn2+ on neurotransmitter release and uptake are not well understood. To address this lack of knowledge, we have combined the photolysis of the novel caged Zn2+ compound [Zn(DPAdeCageOMe)]+ with fast scan cyclic voltammetry (FSCV) at carbon fiber microelectrodes in live, whole brain preparations from zebrafish (Danio rerio). After treating the brain with [Zn(DPAdeCageOMe)]+, Zn2+ was released by application of light that was gated through a computer-controlled shutter synchronized with the FSCV measurements and delivered through a 1 mm fiber optic cable. We systematically optimized the photocage concentration and light application parameters, including the total duration and light-to-electrical stimulation delay time. While sub-s Zn2+ application with this method inhibited DA reuptake, assessed by the first-order rate constant (k) and half-life (t1/2), it had no effect on the electrically stimulated DA overflow ([DA]STIM). Increasing the photocage concentration and light duration progressively inhibited uptake, with maximal effects occurring at 100 μM and 800 ms, respectively. Furthermore, uptake was inhibited 200 ms after Zn2+ photorelease, but no measurable effect occurred after 800 ms. We expect that application of this method to the zebrafish whole brain and other preparations will help expand the current knowledge of how Zn2+ affects neurotransmitter release/uptake in select neurological disease states.
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Affiliation(s)
- Piyanka Hettiarachchi
- Department of Chemistry and R.N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, Kansas 66045
| | - Sayuri Niyangoda
- Department of Chemistry and R.N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, Kansas 66045
| | - Austin Shigemoto
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, MA 01609
| | - Isabel J. Solowiej
- Department of Chemistry and R.N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, Kansas 66045
| | - Shawn C. Burdette
- Department of Chemistry and Biochemistry, Worcester Polytechnic Institute, Worcester, MA 01609
| | - Michael A. Johnson
- Department of Chemistry and R.N. Adams Institute for Bioanalytical Chemistry, University of Kansas, Lawrence, Kansas 66045
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Liu Y, Liu Z, Zhao F, Tian Y. Long-Term Tracking and Dynamically Quantifying of Reversible Changes of Extracellular Ca 2+ in Multiple Brain Regions of Freely Moving Animals. Angew Chem Int Ed Engl 2021; 60:14429-14437. [PMID: 33797152 DOI: 10.1002/anie.202102833] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Indexed: 11/11/2022]
Abstract
Understanding physiological and pathological processes in the brain requires tracking the reversible changes in chemical signals with long-term stability. We developed a new anti-biofouling microfiber array to real-time quantify extracellular Ca2+ concentrations together with neuron activity across many regions in the mammalian brain for 60 days, in which the signal degradation was < ca. 8 %. The microarray with high tempo-spatial resolution (ca. 10 μm, ca. 1.3 s) was implanted into 7 brain regions of free-moving mice to monitor reversible changes of extracellular Ca2+ upon ischemia-reperfusion processes. The changing sequence and rate of Ca2+ in 7 brain regions were different during the stroke. ROS scavenger could protect Ca2+ influx and neuronal activity after stroke, suggesting the significant influence of ROS on Ca2+ overload and neuron death. We demonstrated this microarray is a versatile tool for investigating brain dynamic during pathological processes and drug treatment.
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Affiliation(s)
- Yuandong Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China
| | - Zhichao Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China
| | - Fan Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China
| | - Yang Tian
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University, Dongchuan Road 500, Shanghai, 200241, China
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3
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Liu Y, Liu Z, Zhao F, Tian Y. Long‐Term Tracking and Dynamically Quantifying of Reversible Changes of Extracellular Ca
2+
in Multiple Brain Regions of Freely Moving Animals. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202102833] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Yuandong Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Dongchuan Road 500 Shanghai 200241 China
| | - Zhichao Liu
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Dongchuan Road 500 Shanghai 200241 China
| | - Fan Zhao
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Dongchuan Road 500 Shanghai 200241 China
| | - Yang Tian
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes School of Chemistry and Molecular Engineering East China Normal University Dongchuan Road 500 Shanghai 200241 China
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Wang T, Yang L, Li Y, Bao C, Tang M, Huang X, Cheng H. Simple and Efficient Synthesis of Various Sized Gold Nanoparticles for the Selective Electrochemical Determination of Dopamine. ANAL LETT 2020. [DOI: 10.1080/00032719.2020.1793995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Tingting Wang
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Lili Yang
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Yuan Li
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Changhao Bao
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Minyi Tang
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Xianju Huang
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
| | - Han Cheng
- College of Pharmacy, South Central University for Nationalities, Wuhan, China
- National Demonstration Center for Experimental Ethnopharmacology Education, South-Central University for Nationalities, Wuhan, China
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A novel modification method via in-situ reduction of AuAg bimetallic nanoparticles by polydopamine on carbon fiber microelectrode for H2O2 detection. Microchem J 2020. [DOI: 10.1016/j.microc.2020.104595] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Zhou L, Hou H, Wei H, Yao L, Sun L, Yu P, Su B, Mao L. In Vivo Monitoring of Oxygen in Rat Brain by Carbon Fiber Microelectrode Modified with Antifouling Nanoporous Membrane. Anal Chem 2019; 91:3645-3651. [DOI: 10.1021/acs.analchem.8b05658] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lin Zhou
- Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Hanfeng Hou
- Beijing National Research Center for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Huan Wei
- Beijing National Research Center for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Lina Yao
- Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Lei Sun
- Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Ping Yu
- Beijing National Research Center for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
| | - Bin Su
- Institute of Analytical Chemistry, Department of Chemistry, Zhejiang University, Hangzhou 310058, China
| | - Lanqun Mao
- Beijing National Research Center for Molecular Sciences, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190, China
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7
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A voltammetric sensor for simultaneous determination of lead, cadmium and zinc on an activated carbon fiber rod. CHINESE CHEM LETT 2018. [DOI: 10.1016/j.cclet.2017.05.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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8
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Pereira AR, de Souza JC, Iost RM, Sales FC, Crespilho FN. Application of carbon fibers to flexible enzyme electrodes. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.01.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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9
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Pundir CS, Devi R. Biosensing methods for xanthine determination: A review. Enzyme Microb Technol 2014; 57:55-62. [DOI: 10.1016/j.enzmictec.2013.12.006] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Revised: 12/03/2013] [Accepted: 12/07/2013] [Indexed: 01/03/2023]
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Xiang L, Yu P, Hao J, Zhang M, Zhu L, Dai L, Mao L. Vertically Aligned Carbon Nanotube-Sheathed Carbon Fibers as Pristine Microelectrodes for Selective Monitoring of Ascorbate in Vivo. Anal Chem 2014; 86:3909-14. [DOI: 10.1021/ac404232h] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ling Xiang
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Ping Yu
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Jie Hao
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Meining Zhang
- Department
of Chemistry, Renmin University of China, Beijing 100872, China
| | - Lin Zhu
- Department
of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Liming Dai
- Department
of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Lanqun Mao
- Beijing
National Laboratory for Molecular Sciences, Key Laboratory of Analytical
Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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11
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Gong K. Vertically-aligned Prussian blue/carbon nanotube nanocomposites on a carbon microfiber as a biosensing scaffold for ultrasensitively detecting glucose. J Colloid Interface Sci 2013; 410:152-7. [DOI: 10.1016/j.jcis.2013.08.005] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Revised: 07/31/2013] [Accepted: 08/01/2013] [Indexed: 11/30/2022]
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12
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Thandavan K, Gandhi S, Sethuraman S, Rayappan JBB, Krishnan UM. Development of electrochemical biosensor with nano-interface for xanthine sensing – A novel approach for fish freshness estimation. Food Chem 2013; 139:963-9. [DOI: 10.1016/j.foodchem.2013.02.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2012] [Revised: 12/04/2012] [Accepted: 02/02/2013] [Indexed: 01/01/2023]
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13
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A method for determination of xanthine in meat by amperometric biosensor based on silver nanoparticles/cysteine modified Au electrode. Process Biochem 2013. [DOI: 10.1016/j.procbio.2012.12.009] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Lawal AT, Adeloju SB. Mediated xanthine oxidase potentiometric biosensors for hypoxanthine based on ferrocene carboxylic acid modified electrode. Food Chem 2012; 135:2982-7. [DOI: 10.1016/j.foodchem.2012.07.052] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Revised: 09/27/2011] [Accepted: 07/03/2012] [Indexed: 10/28/2022]
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Lawal AT, Adeloju SB. Progress and recent advances in fabrication and utilization of hypoxanthine biosensors for meat and fish quality assessment: a review. Talanta 2012; 100:217-28. [PMID: 23141330 DOI: 10.1016/j.talanta.2012.07.085] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2012] [Revised: 07/28/2012] [Accepted: 07/31/2012] [Indexed: 10/28/2022]
Abstract
This review provides an update on the research conducted on the fabrication and utilization of hypoxanthine (Hx) biosensors published over the past four decades. In particular, the review focuses on progress made in the development and use of Hx biosensors for the assessment of fish and meat quality which has dominated research in this area. The various fish and meat freshness indexes that have been proposed over this period are highlighted. Furthermore, recent developments and future advances in the use of screen-printed electrodes and nanomaterials for achieving improved performances for the reliable determination of Hx in fish and meat are discussed.
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Affiliation(s)
- Abdulazeez T Lawal
- NanoScience and Sensor Technology Research Group, School of Applied Sciences and Engineering, Monash University, Churchill, Vic. 3842, Australia
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16
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Devi R, Narang J, Yadav S, Pundir CS. Amperometric determination of xanthine in tea, coffee, and fish meat with graphite rod bound xanthine oxidase. JOURNAL OF ANALYTICAL CHEMISTRY 2012. [DOI: 10.1134/s1061934812030045] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Devi R, Yadav S, Pundir C. Electrochemical detection of xanthine in fish meat by xanthine oxidase immobilized on carboxylated multiwalled carbon nanotubes/polyaniline composite film. Biochem Eng J 2011. [DOI: 10.1016/j.bej.2011.09.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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18
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Devi R, Thakur M, Pundir C. Construction and application of an amperometric xanthine biosensor based on zinc oxide nanoparticles–polypyrrole composite film. Biosens Bioelectron 2011; 26:3420-6. [DOI: 10.1016/j.bios.2011.01.014] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Accepted: 01/11/2011] [Indexed: 11/15/2022]
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19
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Zhang Z, Xia S, Leonard D, Jaffrezic-Renault N, Zhang J, Bessueille F, Goepfert Y, Wang X, Chen L, Zhu Z, Zhao J, Almeida MG, Silveira CM. A novel nitrite biosensor based on conductometric electrode modified with cytochrome c nitrite reductase composite membrane. Biosens Bioelectron 2009; 24:1574-9. [DOI: 10.1016/j.bios.2008.08.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2008] [Revised: 08/05/2008] [Accepted: 08/06/2008] [Indexed: 11/30/2022]
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20
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Zhang M, Liu K, Xiang L, Lin Y, Su L, Mao L. Carbon nanotube-modified carbon fiber microelectrodes for in vivo voltammetric measurement of ascorbic acid in rat brain. Anal Chem 2007; 79:6559-65. [PMID: 17676820 DOI: 10.1021/ac0705871] [Citation(s) in RCA: 175] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This study demonstrates a new electrochemical method for in vivo measurements of ascorbic acid (AA) in rat brain with multiwalled carbon nanotube (MWNT)-modified carbon fiber microelectrodes (CFMEs) based on the electrochemical property of MWNTs for facilitating AA oxidation. Cyclic voltammetry results indicate that the prepared MWNT-modified CFMEs possess a marked electrocatalytic activity toward AA oxidation and can be used for its selective measurement in the presence of other kinds of electroactive species coexisting in rat brain, such as 3,4-dihydroxyphenylacetic acid, uric acid, and 5-hydroxytryptamine. The selectivity of the MWNT-modified CFMEs toward AA measurement is further studied in vivo by exogenously infusing ascorbate oxidase into the brain, and the results confirm that the prepared electrodes are selective and can thus be used for reliable in vivo measurements of AA in rat brain, combined with their good stability during in vivo measurements. The basal level of striatum AA is determined to be 0.20 +/- 0.05 mM (n = 3). The application of the voltammetric method with the MWNT-modified CFMEs is preliminarily demonstrated for in vivo observation of homeostatic regulation of striatum AA with exogenous infusion of AA into the brain.
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Affiliation(s)
- Meining Zhang
- Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, the Chinese Academy of Sciences (CAS), Beijing, China
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Kumar SA, Chen SM. Fabrication and characterization of Meldola's blue/zinc oxide hybrid electrodes for efficient detection of the reduced form of nicotinamide adenine dinucleotide at low potential. Anal Chim Acta 2007; 592:36-44. [PMID: 17499068 DOI: 10.1016/j.aca.2007.04.022] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2007] [Revised: 04/03/2007] [Accepted: 04/04/2007] [Indexed: 11/20/2022]
Abstract
We report the synthesis and the electrochemical properties of hybrid films made of zinc oxide (ZnO) and Meldola's blue dye (MB) using cyclic voltammetry (CV). MB/ZnO hybrid films were electrochemically deposited onto glassy carbon, gold and indium tin oxide-coated glass (ITO) electrodes at room temperature (25+/-2 degrees C) from the bath solution containing 0.1 M Zn(NO3)2, 0.1 M KNO3 and 1x10(-4) MMB. The surface morphology and deposition kinetics of MB/ZnO hybrid films were studied by means of scanning electron microscopy (SEM), atomic force microscopy (AFM) and electrochemical quartz crystal microbalance (EQCM) techniques, respectively. SEM and AFM images of MB/ZnO hybrid films have revealed that the surfaces are well crystallized, porous and micro structured. MB molecules were immobilized and strongly fixed in a transparent inorganic matrix. MB/ZnO hybrid films modified glassy carbon electrode (MB/ZnO/GC) showed one reversible redox couple centered at formal potential (E0') -0.12 V (pH 6.9). The surface coverage (gamma) of the MB immobilized on ZnO/GC was about 9.86x10(-12) mol cm(-2) and the electron transfer rate constant (ks) was determined to be 38.9 s(-1). The MB/ZnO/GC electrode acted as a sensor and displayed an excellent specific electrocatalytic response to the oxidation of nicotinamide adenine dinucleotide (NADH). The linear response range between 50 and 300 microM NADH concentration at pH 6.9 was observed with a detection limit of 10 microM (S/N=3). The electrode was stable during the time it was used for the full study (about 1 month) without a notable decrease in current. Indeed, dopamine (DA), ascorbic acid (AA), acetaminophen (AP) and uric acid (UA) did not show any interference during the detection of NADH at this modified electrode.
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Affiliation(s)
- S Ashok Kumar
- Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC.
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Tian Y, Mao L, Okajima T, Ohsaka T. A carbon fiber microelectrode-based third-generation biosensor for superoxide anion. Biosens Bioelectron 2005; 21:557-64. [PMID: 16202868 DOI: 10.1016/j.bios.2004.12.006] [Citation(s) in RCA: 73] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2004] [Revised: 12/06/2004] [Accepted: 12/08/2004] [Indexed: 11/29/2022]
Abstract
Implantable and miniature carbon fiber microelectrode (CFME)-based third-generation biosensor for superoxide anion (O(2)(-)) was fabricated for the first time. The CFME-based biosensor was constructed by electro-deposition of Au nanoparticles on the CFMEs and then modification of the Au nanoparticles by cysteine followed by immobilization of superoxide dismutase (SOD) on the electrodes. The direct electrochemistry of the SOD immobilized on the CFME-based electrodes was efficiently realized by electron transfer promoter - cysteine molecules confined on the Au nanoparticles deposited on the CFMEs. The CFME-based biosensors were demonstrated to possess striking analytical properties for O(2)(-) determination, such as optional operation potentials, high selectivity and sensitivity as well as good stability. Along with the implantable capacity inherent in the CFMEs, these striking analytical properties of the CFME-based biosensors substantially make them potential for in vivo determination of O(2)(-).
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Affiliation(s)
- Yang Tian
- Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan
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Ghica ME, Brett CM. A glucose biosensor using methyl viologen redox mediator on carbon film electrodes. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2004.10.058] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Mao L, Xu F, Xu Q, Jin L. Miniaturized amperometric biosensor based on xanthine oxidase for monitoring hypoxanthine in cell culture media. Anal Biochem 2001; 292:94-101. [PMID: 11319822 DOI: 10.1006/abio.2001.5067] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Fabrication and characterization of miniaturized amperometric hypoxanthine biosensors are described and demonstrated for monitoring hypoxanthine in myocardial cell culture media. The sensors are based on xanthine oxidase (XO) immobilized on carbon fiber microelectrodes (CFMEs) using a composite film of Nafion and electropolymerized phenol (PPh). Nafion was used for XO immobilization because of its film hydrophobicity, enzyme-favored environment, and electrostatic interaction with XO, which was dispersed in Nafion film by immersing the Nafion-coated CFMEs in XO solution for 5 h. PPh film was formed as an overlay on Nafion and XO-modified CFMEs via electropolymerization. Hypoxanthine was measured with the sensor by the oxidation of enzymatic reaction products, hydrogen peroxide (H(2)O(2)), and uric acid (UA) at +0.60 V (vs Ag/AgCl). The use of Nafion and PPh as a matrix for XO immobilization yields enhanced specificity, sensitivity, and linearity toward hypoxanthine. A dynamic linear range of 5.0 microM to 1.8 mM was achieved with a calculated detection limit of 1.5 microM (S/N = 3) and a sensitivity of 3.144 nA/mM. In addition, the measurement was virtually interference-free from easily oxidizable species such as UA, ascorbic acid, physiological levels of neurotransmitters, and their principal metabolites. The biosensor was used to monitor hypoxanthine accumulation in myocardial cell culture media, in which the level of extracellular hypoxanthine was found to increase with ischemic tolerance.
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Affiliation(s)
- L Mao
- Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama, 226-8502, Japan.
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Electrochemistry of phenothiazine and methylviologen biosensor electron-transfer mediators at nanoelectrode ensembles. J Electroanal Chem (Lausanne) 2000. [DOI: 10.1016/s0022-0728(00)00169-8] [Citation(s) in RCA: 76] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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