1
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Ehtesabi H, Kalji SO. Carbon nanomaterials for sweat-based sensors: a review. Mikrochim Acta 2024; 191:77. [PMID: 38177621 DOI: 10.1007/s00604-023-06162-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 12/20/2023] [Indexed: 01/06/2024]
Abstract
Sweat is easily accessible from the human skin's surface. It is secreted by the eccrine glands and contains a wealth of physiological information, including metabolites and electrolytes like glucose and Na ions. Sweat is a particularly useful biofluid because of its easy and non-invasive access, unlike other biofluids, like blood. On the other hand, nanomaterials have started to show promise operation as a competitive substitute for biosensors and molecular sensors throughout the last 10 years. Among the most synthetic nanomaterials that are studied, applied, and discussed, carbon nanomaterials are special. They are desirable candidates for sensor applications because of their many intrinsic electrical, magnetic, and optical characteristics; their chemical diversity and simplicity of manipulation; their biocompatibility; and their effectiveness as a chemically resistant platform. Carbon nanofibers (CNFs), carbon dots (CDs), carbon nanotubes (CNTs), and graphene have been intensively investigated as molecular sensors or as components that can be integrated into devices. In this review, we summarize recent advances in the use of carbon nanomaterials as sweat sensors and consider how they can be utilized to detect a diverse range of analytes in sweat, such as glucose, ions, lactate, cortisol, uric acid, and pH.
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Affiliation(s)
- Hamide Ehtesabi
- Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran.
| | - Seyed-Omid Kalji
- Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
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2
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Zhang S, Chen YC, Riezk A, Ming D, Tsvik L, Sützl L, Holmes A, O’Hare D. Rapid Measurement of Lactate in the Exhaled Breath Condensate: Biosensor Optimization and In-Human Proof of Concept. ACS Sens 2022; 7:3809-3816. [PMID: 36411083 PMCID: PMC9791687 DOI: 10.1021/acssensors.2c01739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Lactate concentration is of increasing interest as a diagnostic for sepsis, septic shock, and trauma. Compared with the traditional blood sample media, the exhaled breath condensate (EBC) has the advantages of non-invasiveness and higher user acceptance. An amperometric biosensor was developed and its application in EBC lactate detection was investigated in this paper. The sensor was modified with PEDOT:PSS-PB, and two different lactate oxidases (LODs). A rotating disk electrode and Koutecky-Levich analysis were applied for the kinetics analysis and gel optimization. The optimized gel formulation was then tested on disposable screen-printed sensors. The disposable sensors exhibited good performance and presented a high stability for both LOD modifications. Finally, human EBC analysis was conducted from a healthy subject at rest and after 30 min of intense aerobic cycling exercise. The sensor coulometric measurements showed good agreement with fluorometric and triple quadrupole liquid chromatography mass spectrometry reference methods. The EBC lactate concentration increased from 22.5 μM (at rest) to 28.0 μM (after 30 min of cycling) and dropped back to 5.3 μM after 60 min of rest.
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Affiliation(s)
- Shulin Zhang
- Department
of Bioengineering, Imperial College London, LondonSW7 2AZ, U.K.,
| | - Yu-Chih Chen
- Department
of Bioengineering, Imperial College London, LondonSW7 2AZ, U.K.
| | - Alaa Riezk
- Faculty
of Medicine, Department of Infectious Disease, Centre for Antimicrobial
Optimisation, Imperial College London, LondonSW7 2AZ, U.K.
| | - Damien Ming
- Faculty
of Medicine, Department of Infectious Disease, Centre for Antimicrobial
Optimisation, Imperial College London, LondonSW7 2AZ, U.K.
| | - Lidiia Tsvik
- Laboratory
of Food Biotechnology, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences
Vienna, Muthgasse 11, WienA-1190, Austria
| | - Leander Sützl
- Laboratory
of Food Biotechnology, Department of Food Science and Technology, BOKU-University of Natural Resources and Life Sciences
Vienna, Muthgasse 11, WienA-1190, Austria
| | - Alison Holmes
- Faculty
of Medicine, Department of Infectious Disease, Centre for Antimicrobial
Optimisation, Imperial College London, LondonSW7 2AZ, U.K.
| | - Danny O’Hare
- Department
of Bioengineering, Imperial College London, LondonSW7 2AZ, U.K.
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3
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Shen Y, Liu C, He H, Zhang M, Wang H, Ji K, Wei L, Mao X, Sun R, Zhou F. Recent Advances in Wearable Biosensors for Non-Invasive Detection of Human Lactate. BIOSENSORS 2022; 12:1164. [PMID: 36551131 PMCID: PMC9776101 DOI: 10.3390/bios12121164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/29/2022] [Accepted: 12/09/2022] [Indexed: 06/17/2023]
Abstract
Lactate, a crucial product of the anaerobic metabolism of carbohydrates in the human body, is of enormous significance in the diagnosis and treatment of diseases and scientific exercise management. The level of lactate in the bio-fluid is a crucial health indicator because it is related to diseases, such as hypoxia, metabolic disorders, renal failure, heart failure, and respiratory failure. For critically ill patients and those who need to regularly control lactate levels, it is vital to develop a non-invasive wearable sensor to detect lactate levels in matrices other than blood. Due to its high sensitivity, high selectivity, low detection limit, simplicity of use, and ability to identify target molecules in the presence of interfering chemicals, biosensing is a potential analytical approach for lactate detection that has received increasing attention. Various types of wearable lactate biosensors are reviewed in this paper, along with their preparation, key properties, and commonly used flexible substrate materials including polydimethylsiloxane (PDMS), polyethylene terephthalate (PET), paper, and textiles. Key performance indicators, including sensitivity, linear detection range, and detection limit, are also compared. The challenges for future development are also summarized, along with some recommendations for the future development of lactate biosensors.
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Affiliation(s)
- Yutong Shen
- School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710048, China
- Key Laboratory of Functional Textile Material and Product of the Ministry of Education, Xi’an Polytechnic University, Xi’an 710048, China
- Shaanxi College Engineering Research Center of Functional Micro/Nano Textile Materials, Xi’an Polytechnic University, Xi’an 710048, China
| | - Chengkun Liu
- School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710048, China
- Key Laboratory of Functional Textile Material and Product of the Ministry of Education, Xi’an Polytechnic University, Xi’an 710048, China
- Shaanxi College Engineering Research Center of Functional Micro/Nano Textile Materials, Xi’an Polytechnic University, Xi’an 710048, China
| | - Haijun He
- Engineering Research Center for Knitting Technology of the Ministry of Education, Jiangnan University, Wuxi 214122, China
| | - Mengdi Zhang
- School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710048, China
- Key Laboratory of Functional Textile Material and Product of the Ministry of Education, Xi’an Polytechnic University, Xi’an 710048, China
- Shaanxi College Engineering Research Center of Functional Micro/Nano Textile Materials, Xi’an Polytechnic University, Xi’an 710048, China
| | - Hao Wang
- School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710048, China
- Key Laboratory of Functional Textile Material and Product of the Ministry of Education, Xi’an Polytechnic University, Xi’an 710048, China
- Shaanxi College Engineering Research Center of Functional Micro/Nano Textile Materials, Xi’an Polytechnic University, Xi’an 710048, China
| | - Keyu Ji
- School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710048, China
- Key Laboratory of Functional Textile Material and Product of the Ministry of Education, Xi’an Polytechnic University, Xi’an 710048, China
- Shaanxi College Engineering Research Center of Functional Micro/Nano Textile Materials, Xi’an Polytechnic University, Xi’an 710048, China
| | - Liang Wei
- School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710048, China
- Key Laboratory of Functional Textile Material and Product of the Ministry of Education, Xi’an Polytechnic University, Xi’an 710048, China
- Shaanxi College Engineering Research Center of Functional Micro/Nano Textile Materials, Xi’an Polytechnic University, Xi’an 710048, China
| | - Xue Mao
- School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710048, China
- Key Laboratory of Functional Textile Material and Product of the Ministry of Education, Xi’an Polytechnic University, Xi’an 710048, China
- Shaanxi College Engineering Research Center of Functional Micro/Nano Textile Materials, Xi’an Polytechnic University, Xi’an 710048, China
| | - Runjun Sun
- School of Textile Science and Engineering, Xi’an Polytechnic University, Xi’an 710048, China
- Key Laboratory of Functional Textile Material and Product of the Ministry of Education, Xi’an Polytechnic University, Xi’an 710048, China
- Shaanxi College Engineering Research Center of Functional Micro/Nano Textile Materials, Xi’an Polytechnic University, Xi’an 710048, China
| | - Fenglei Zhou
- Centre for Medical Image Computing, Department of Medical Physics and Biomedical Engineering, University College London, London WC1E 6BT, UK
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Singh A, Ahmed A, Sharma A, Arya S. Graphene and Its Derivatives: Synthesis and Application in the Electrochemical Detection of Analytes in Sweat. BIOSENSORS 2022; 12:bios12100910. [PMID: 36291046 PMCID: PMC9599499 DOI: 10.3390/bios12100910] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 10/07/2022] [Accepted: 10/15/2022] [Indexed: 05/25/2023]
Abstract
Wearable sensors and invasive devices have been studied extensively in recent years as the demand for real-time human healthcare applications and seamless human-machine interaction has risen exponentially. An explosion in sensor research throughout the globe has been ignited by the unique features such as thermal, electrical, and mechanical properties of graphene. This includes wearable sensors and implants, which can detect a wide range of data, including body temperature, pulse oxygenation, blood pressure, glucose, and the other analytes present in sweat. Graphene-based sensors for real-time human health monitoring are also being developed. This review is a comprehensive discussion about the properties of graphene, routes to its synthesis, derivatives of graphene, etc. Moreover, the basic features of a biosensor along with the chemistry of sweat are also discussed in detail. The review mainly focusses on the graphene and its derivative-based wearable sensors for the detection of analytes in sweat. Graphene-based sensors for health monitoring will be examined and explained in this study as an overview of the most current innovations in sensor designs, sensing processes, technological advancements, sensor system components, and potential hurdles. The future holds great opportunities for the development of efficient and advanced graphene-based sensors for the detection of analytes in sweat.
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Xiao D, Hu C, Xu X, Lü C, Wang Q, Zhang W, Gao C, Xu P, Wang X, Ma C. A d,l-lactate biosensor based on allosteric transcription factor LldR and amplified luminescent proximity homogeneous assay. Biosens Bioelectron 2022; 211:114378. [PMID: 35617798 DOI: 10.1016/j.bios.2022.114378] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 05/11/2022] [Accepted: 05/13/2022] [Indexed: 11/02/2022]
Abstract
Lactate, a hydroxycarboxylic acid commercially produced by microbial fermentation, is widely applied in diverse industrial fields. Lactate exists in two stereoisomeric forms (d-lactate and l-lactate). d-Lactate and l-lactate are often simultaneously present in many biological samples. Therefore, a biosensor able to detect both d- and l-lactate is required but previously unavailable. Herein, an allosteric transcription factor LldR from Pseudomonas aeruginosa PAO1, which responds to both d-lactate and l-lactate, was combined with amplified luminescent proximity homogeneous assay technology to develop a d,l-lactate biosensor. The proposed biosensor was optimized by mutation of DNA sequence in binding site of LldR. The optimized biosensor BLac-6 can accurately detect the concentration of lactate independent on ratio of the two isomers in pending test samples. The biosensor was also tentatively used in quantitative analysis of d-lactate, l-lactate, or d,l-lactate in fermentation samples produced by three recombinant strains of Klebsiella oxytoca. With its desirable properties, the biosensor BLac-6 may be a potential choice for monitoring the concentration of lactate during industrial fermentation.
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Affiliation(s)
- Dan Xiao
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, PR China
| | - Chunxia Hu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, PR China
| | - Xianzhi Xu
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, PR China
| | - Chuanjuan Lü
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, PR China
| | - Qian Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, PR China
| | - Wen Zhang
- Institute of Medical Sciences, The Second Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250033, PR China
| | - Chao Gao
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, PR China
| | - Ping Xu
- State Key Laboratory of Microbial Metabolism, and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, PR China
| | - Xia Wang
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, PR China
| | - Cuiqing Ma
- State Key Laboratory of Microbial Technology, Shandong University, Qingdao, 266237, PR China.
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6
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Xiao H, Cao L, Qin H, Wei S, Gu M, Zhao F, Chen Z. Non-enzymatic lactic acid sensor based on AuPtNPs functionalized MoS2 nanosheet as electrode modified materials. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115806] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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7
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Monitoring of Lactate in Interstitial Fluid, Saliva and Sweat by Electrochemical Biosensor: The Uncertainties of Biological Interpretation. CHEMOSENSORS 2021. [DOI: 10.3390/chemosensors9080195] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Lactate electrochemical biosensors were fabricated using Pediococcus sp lactate oxidase (E.C. 1.1.3.2), an external polyurethane membrane laminate diffusion barrier and an internal ionomeric polymer barrier (sulphonated polyether ether sulphone polyether sulphone, SPEES PES). In a needle embodiment, a Pt wire working electrode was retained within stainless steel tubing serving as pseudoreference. The construct gave linearity to at least 25 mM lactate with 0.17 nA/mM lactate sensitivity. A low permeability inner membrane was also unexpectedly able to increase linearity. Responses were oxygen dependent at pO2 < 70 mmHg, irrespective of the inclusion of an external diffusion barrier membrane. Subcutaneous tissue was monitored in Sprague Dawley rats, and saliva and sweat during exercise in human subjects. The tissue sensors registered no response to intravenous Na lactate, indicating a blood-tissue lactate barrier. Salivary lactate allowed tracking of blood lactate during exercise, but lactate levels were substantially lower than those in blood (0–3.5 mM vs. 1.6–12.1 mM), with variable degrees of lactate partitioning from blood, evident both between subjects and at different exercise time points. Sweat lactate during exercise measured up to 23 mM but showed highly inconsistent change as exercise progressed. We conclude that neither tissue interstitial fluid nor sweat are usable as surrogates for blood lactate, and that major reappraisal of lactate sensor use is indicated for any extravascular monitoring strategy for lactate.
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8
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Hussain MM, Asiri AM, Rahman MM. A non-enzymatic electrochemical approach for l-lactic acid sensor development based on CuO·MWCNT nanocomposites modified with a Nafion matrix. NEW J CHEM 2020. [DOI: 10.1039/d0nj01715a] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper oxide decorated multi-walled carbon nanotube nanocomposites (CuO·MWCNT NCs) were prepared using a simple wet-chemical technique in basic medium.
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Affiliation(s)
- Mohammad Musarraf Hussain
- Chemistry Department
- Faculty of Science
- King Abdulaziz University
- Saudi Arabia
- Center of Excellence for Advanced Materials Research (CEAMR)
| | - Abdullah M. Asiri
- Chemistry Department
- Faculty of Science
- King Abdulaziz University
- Saudi Arabia
- Center of Excellence for Advanced Materials Research (CEAMR)
| | - Mohammed M. Rahman
- Chemistry Department
- Faculty of Science
- King Abdulaziz University
- Saudi Arabia
- Center of Excellence for Advanced Materials Research (CEAMR)
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9
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Lactate biosensing: The emerging point-of-care and personal health monitoring. Biosens Bioelectron 2018; 117:818-829. [DOI: 10.1016/j.bios.2018.06.054] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2018] [Accepted: 06/26/2018] [Indexed: 11/19/2022]
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10
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Cummins G, Kremer J, Bernassau A, Brown A, Bridle HL, Schulze H, Bachmann TT, Crichton M, Denison FC, Desmulliez MPY. Sensors for Fetal Hypoxia and Metabolic Acidosis: A Review. SENSORS (BASEL, SWITZERLAND) 2018; 18:E2648. [PMID: 30104478 PMCID: PMC6111374 DOI: 10.3390/s18082648] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 07/30/2018] [Accepted: 08/02/2018] [Indexed: 12/11/2022]
Abstract
This article reviews existing clinical practices and sensor research undertaken to monitor fetal well-being during labour. Current clinical practices that include fetal heart rate monitoring and fetal scalp blood sampling are shown to be either inadequate or time-consuming. Monitoring of lactate in blood is identified as a potential alternative for intrapartum fetal monitoring due to its ability to distinguish between different types of acidosis. A literature review from a medical and technical perspective is presented to identify the current advancements in the field of lactate sensors for this application. It is concluded that a less invasive and a more continuous monitoring device is required to fulfill the clinical needs of intrapartum fetal monitoring. Potential specifications for such a system are also presented in this paper.
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Affiliation(s)
- Gerard Cummins
- Institute of Sensors, Signals and Systems, Heriot-Watt University, Riccarton EH14 4AS, Scotland, UK.
| | - Jessica Kremer
- Institute of Sensors, Signals and Systems, Heriot-Watt University, Riccarton EH14 4AS, Scotland, UK.
| | - Anne Bernassau
- Institute of Sensors, Signals and Systems, Heriot-Watt University, Riccarton EH14 4AS, Scotland, UK.
| | - Andrew Brown
- MRC Centre for Reproductive Health, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, Scotland, UK.
| | - Helen L Bridle
- Institute of Sensors, Signals and Systems, Heriot-Watt University, Riccarton EH14 4AS, Scotland, UK.
| | - Holger Schulze
- Division of Infection and Pathway Medicine, Edinburgh Medical School, The Chancellor's Building, The University of Edinburgh, Edinburgh EH16 4SB, Scotland, UK.
| | - Till T Bachmann
- Division of Infection and Pathway Medicine, Edinburgh Medical School, The Chancellor's Building, The University of Edinburgh, Edinburgh EH16 4SB, Scotland, UK.
| | - Michael Crichton
- Institute of Mechanical, Processing and Energy Engineering, Heriot-Watt University, Riccarton EH14 4AS, Scotland, UK.
| | - Fiona C Denison
- MRC Centre for Reproductive Health, Queen's Medical Research Institute, University of Edinburgh, Edinburgh EH16 4TJ, Scotland, UK.
| | - Marc P Y Desmulliez
- Institute of Sensors, Signals and Systems, Heriot-Watt University, Riccarton EH14 4AS, Scotland, UK.
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12
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Bravo I, Revenga-Parra M, Pariente F, Lorenzo E. Reagent-Less and Robust Biosensor for Direct Determination of Lactate in Food Samples. SENSORS 2017; 17:s17010144. [PMID: 28098753 PMCID: PMC5298717 DOI: 10.3390/s17010144] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 12/20/2016] [Accepted: 01/11/2017] [Indexed: 11/23/2022]
Abstract
Lactic acid is a relevant analyte in the food industry, since it affects the flavor, freshness, and storage quality of several products, such as milk and dairy products, juices, or wines. It is the product of lactose or malo-lactic fermentation. In this work, we developed a lactate biosensor based on the immobilization of lactate oxidase (LOx) onto N,N′-Bis(3,4-dihydroxybenzylidene) -1,2-diaminobenzene Schiff base tetradentate ligand-modified gold nanoparticles (3,4DHS–AuNPs) deposited onto screen-printed carbon electrodes, which exhibit a potent electrocatalytic effect towards hydrogen peroxide oxidation/reduction. 3,4DHS–AuNPs were synthesized within a unique reaction step, in which 3,4DHS acts as reducing/capping/modifier agent for the generation of stable colloidal suspensions of Schiff base ligand–AuNPs assemblies of controlled size. The ligand—in addition to its reduction action—provides a robust coating to gold nanoparticles and a catalytic function. Lactate oxidase (LOx) catalyzes the conversion of l-lactate to pyruvate in the presence of oxygen, producing hydrogen peroxide, which is catalytically oxidized at 3,4DHS–AuNPs modified screen-printed carbon electrodes at +0.2 V. The measured electrocatalytic current is directly proportional to the concentration of peroxide, which is related to the amount of lactate present in the sample. The developed biosensor shows a detection limit of 2.6 μM lactate and a sensitivity of 5.1 ± 0.1 μA·mM−1. The utility of the device has been demonstrated by the determination of the lactate content in different matrixes (white wine, beer, and yogurt). The obtained results compare well to those obtained using a standard enzymatic-spectrophotometric assay kit.
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Affiliation(s)
- Iria Bravo
- Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain.
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Faraday, 9, Campus UAM, Cantoblanco, 28049 Madrid, Spain.
| | - Mónica Revenga-Parra
- Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain.
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Faraday, 9, Campus UAM, Cantoblanco, 28049 Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - Félix Pariente
- Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - Encarnación Lorenzo
- Departamento de Química Analítica y Análisis Instrumental, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid, Spain.
- Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia), Faraday, 9, Campus UAM, Cantoblanco, 28049 Madrid, Spain.
- Institute for Advanced Research in Chemical Sciences (IAdChem), Universidad Autónoma de Madrid, 28049 Madrid, Spain.
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Rathee K, Dhull V, Dhull R, Singh S. Biosensors based on electrochemical lactate detection: A comprehensive review. Biochem Biophys Rep 2015; 5:35-54. [PMID: 28955805 PMCID: PMC5600356 DOI: 10.1016/j.bbrep.2015.11.010] [Citation(s) in RCA: 94] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 11/08/2015] [Accepted: 11/10/2015] [Indexed: 01/19/2023] Open
Abstract
Lactate detection plays a significant role in healthcare, food industries and is specially necessitated in conditions like hemorrhage, respiratory failure, hepatic disease, sepsis and tissue hypoxia. Conventional methods for lactate determination are not accurate and fast so this accelerated the need of sensitive biosensors for high-throughput screening of lactate in different samples. This review focuses on applications and developments of various electrochemical biosensors based on lactate detection as lactate being essential metabolite in anaerobic metabolic pathway. A comparative study to summarize the L-lactate biosensors on the basis of different analytical properties in terms of fabrication, sensitivity, detection limit, linearity, response time and storage stability has been done. It also addresses the merits and demerits of current enzyme based lactate biosensors. Lactate biosensors are of two main types – lactate oxidase (LOD) and lactate dehydrogenase (LDH) based. Different supports tried for manufacturing lactate biosensors include membranes, polymeric matrices-conducting or non-conducting, transparent gel matrix, hydrogel supports, screen printed electrodes and nanoparticles. All the examples in these support categories have been aptly discussed. Finally this review encompasses the conclusion and future emerging prospects of lactate sensors. Different enzymes used in lactate bio sensing have been studied. Support used for fabrication biosensors have been discussed. The linearity range, response time, detection limit, etc. have been studied. Merits and demerits of different supports are also discussed.
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Affiliation(s)
- Kavita Rathee
- Department of Biochemistry, Maharshi Dayanand University, Rohtak 124001, India
| | - Vikas Dhull
- Department of Bio & Nano Technology, Guru Jambheshwar University of Science & Technology, Hisar 125001, India
| | - Rekha Dhull
- Department of Biochemistry, Maharshi Dayanand University, Rohtak 124001, India
| | - Sandeep Singh
- Department of Biochemistry, Maharshi Dayanand University, Rohtak 124001, India
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14
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Rishi L, Yaqoob M, Asghar M, Nabi A, Munawar N. Flow Injection Determination of Lactate Using Immobilized Lactate Dehydrogenase Enzyme with Tris(2,2′-Bipyridyl)Ruthenium(III) Chemiluminescence Detection. ANAL LETT 2015. [DOI: 10.1080/00032719.2015.1017764] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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15
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Sun C, Wang D, Zhang M, Ni Y, Shen X, Song Y, Geng Z, Xu W, Liu F, Mao C. Novel l-lactic acid biosensors based on conducting polypyrrole-block copolymer nanoparticles. Analyst 2015; 140:797-802. [DOI: 10.1039/c4an01602e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Novel polypyrrole-Pluronic F127 nanoparticles with conducting and biocompatibility properties were used to construct an l-lactic acid biosensor. This method proposes great potential for the detection and evaluation of meat quality.
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Affiliation(s)
- Chong Sun
- Institute of Agricultural Products Processing
- Jiangsu Academy of Agricultural Sciences
- Nanjing 210014
- PR China
| | - Daoying Wang
- Institute of Agricultural Products Processing
- Jiangsu Academy of Agricultural Sciences
- Nanjing 210014
- PR China
| | - Muhan Zhang
- Institute of Agricultural Products Processing
- Jiangsu Academy of Agricultural Sciences
- Nanjing 210014
- PR China
| | - Yanxiu Ni
- Institute of Veterinary Medicine
- Jiangsu Academy of Agricultural Sciences
- Nanjing 210014
- PR China
| | - Xiaohui Shen
- National and Local Joint Engineering Research Center of Biomedical Functional Materials
- Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210023
| | - Youchao Song
- National and Local Joint Engineering Research Center of Biomedical Functional Materials
- Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210023
| | - Zhiming Geng
- Institute of Agricultural Products Processing
- Jiangsu Academy of Agricultural Sciences
- Nanjing 210014
- PR China
| | - Weimin Xu
- Institute of Agricultural Products Processing
- Jiangsu Academy of Agricultural Sciences
- Nanjing 210014
- PR China
| | - Fang Liu
- Institute of Agricultural Products Processing
- Jiangsu Academy of Agricultural Sciences
- Nanjing 210014
- PR China
| | - Chun Mao
- National and Local Joint Engineering Research Center of Biomedical Functional Materials
- Jiangsu Key Laboratory of Biofunctional Materials
- College of Chemistry and Materials Science
- Nanjing Normal University
- Nanjing 210023
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16
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Lamas-Ardisana PJ, Loaiza OA, Añorga L, Jubete E, Borghei M, Ruiz V, Ochoteco E, Cabañero G, Grande HJ. Disposable amperometric biosensor based on lactate oxidase immobilised on platinum nanoparticle-decorated carbon nanofiber and poly(diallyldimethylammonium chloride) films. Biosens Bioelectron 2014; 56:345-51. [DOI: 10.1016/j.bios.2014.01.047] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 01/22/2014] [Accepted: 01/23/2014] [Indexed: 11/25/2022]
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17
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Development of pH-based ElecFET biosensors for lactate ion detection. Biosens Bioelectron 2013; 40:291-6. [DOI: 10.1016/j.bios.2012.07.063] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2012] [Revised: 07/18/2012] [Accepted: 07/28/2012] [Indexed: 10/27/2022]
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18
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Lei Y, Luo N, Yan X, Zhao Y, Zhang G, Zhang Y. A highly sensitive electrochemical biosensor based on zinc oxide nanotetrapods for L-lactic acid detection. NANOSCALE 2012; 4:3438-3443. [PMID: 22538963 DOI: 10.1039/c2nr30334e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An amperometric biosensor based on zinc oxide (ZnO) nanotetrapods was designed to detect L-lactic acid. The lactate oxidase was immobilized on the surface of ZnO nanotetrapods by electrostatic adsorption. Unlike traditional detectors, the special four-leg individual ZnO nanostructure, as an adsorption layer, provides multiterminal charge transfer channels. Furthermore, a large amount of ZnO tetrapods are randomly stacked to form a three-dimensional network naturally that facilitates the exchange of electrons and ions in the phosphate buffer solution. Utilizing amperometric response measurements, the prepared ZnO nanotetrapod L-lactic acid biosensor displayed a detection limit of 1.2 μM, a low apparent Michaelis-Menten constant of 0.58 mM, a high sensitivity of 28.0 μA cm(-2) mM(-1) and a good linear relationship in the range of 3.6 μM-0.6 mM for the L-lactic acid detection. This study shows that the biosensor based on ZnO tetrapod nanostructures is highly sensitive and able to respond rapidly in detecting lactic acid.
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Affiliation(s)
- Yang Lei
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science & Engineering, University of Science & Technology Beijing, Beijing 100083, PR China
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19
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Development of an amperometric l-lactate biosensor based on l-lactate oxidase immobilized through silica sol–gel film on multi-walled carbon nanotubes/platinum nanoparticle modified glassy carbon electrode. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2008. [DOI: 10.1016/j.msec.2007.04.033] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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Li YS, Ju X, Gao XF, Zhao YY, Wu YF. Immobilization enzyme fluorescence capillary analysis for determination of lactic acid. Anal Chim Acta 2008; 610:249-56. [PMID: 18291136 DOI: 10.1016/j.aca.2008.01.049] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2007] [Revised: 01/11/2008] [Accepted: 01/21/2008] [Indexed: 11/30/2022]
Abstract
A new method for the determination of lactic acid based on the immobilization enzyme fluorescence capillary analysis (IE-FCA) was proposed. Lactic dehydrogenase (LDH) was immobilized on inner surface of a capillary with glutaraldehyde, and an immobilized enzyme lactate capillary bioreactor (IE-LCBR) was formed for the determination of lactic acid. After nicotinamide adenine dinucleotide (NAD(+)) is mixed with lactic acid solution, it was sucked into the IE-LCBR and was detected at lambda(ex) 353 nm/lambda(em) 466 nm. Optimized conditions are as follows: the temperature is 38 degrees C; the reaction time is 15 min; the concentrations of Tris buffer (pH 8.8) and NAD(+) are 0.1 mol L(-1) and 4 mmol L(-1), respectively; the concentration of LDH used for immobilization is 15 kU L(-1). The concentration of lactic acid is directly proportional to the fluorescence intensity measured from 0.50 to 2.0 mmol L(-1); and the analytical recovery of added lactic acid was 99-105%. The minimum detection limit of the method is 0.40 mmol L(-1) and sensitivity of the IE-CBR is 4.6 F mmol(-1) L(-1) lactate. Its relative standard deviation (R.S.D.) is < or =2.0%. This IE-FCA method was employed for determination of lactate in milk drink.
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Affiliation(s)
- Yong-Sheng Li
- School of Chemical Engineering, Sichuan University, Chengdu 610065, China.
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21
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Amperometric lactate biosensors and their application in (sports) medicine, for life quality and wellbeing. Mikrochim Acta 2007. [DOI: 10.1007/s00604-007-0834-8] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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22
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A highly-sensitive l-lactate biosensor based on sol-gel film combined with multi-walled carbon nanotubes (MWCNTs) modified electrode. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2007. [DOI: 10.1016/j.msec.2006.01.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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23
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Laschi S, Mascini M. Planar electrochemical sensors for biomedical applications. Med Eng Phys 2006; 28:934-43. [PMID: 16822696 DOI: 10.1016/j.medengphy.2006.05.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2006] [Accepted: 05/04/2006] [Indexed: 10/24/2022]
Abstract
Electrochemistry has superior properties respect to the other measurement systems because of the rapid, simple and sensitive characteristics. For all these reasons, electrochemical sensors are playing a key role in many scientific sectors. Planar electrochemical sensors present many advantages respect to the three-dimensional devices, but this technology requires the use of specialty chemicals to meet the new functional requirements of planarization and miniaturization. In this paper, some production techniques and procedures to obtain planar electrochemical sensors are reported, together with their applications.
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Affiliation(s)
- Serena Laschi
- Università di Firenze, Dipartimento di Chimica, Via della Lastruccia 3, 50019 Sesto Fiorentino, Firenze, Italy
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24
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Burmeister JJ, Palmer M, Gerhardt GA. l-lactate measures in brain tissue with ceramic-based multisite microelectrodes. Biosens Bioelectron 2005; 20:1772-9. [PMID: 15681193 DOI: 10.1016/j.bios.2004.07.003] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2004] [Revised: 07/02/2004] [Accepted: 07/07/2004] [Indexed: 11/30/2022]
Abstract
A newly developed multisite array microelectrode for in vivo measurements of L-lactate is presented. The resulting microelectrode is composed of three functional layers. First, Nafion is used to repel interfering electroactive anions, such as ascorbate. Second, L-lactate oxidase immobilized onto the recording sites is used to convert L-lactate to hydrogen peroxide. The H2O2 produced is proportional to L-lactate concentrations and is quantified at the platinum recording sites. Third, a layer of polyurethane is coated over the L-lactate oxidase to adjust the linear range of the microelectrode to one that is compatible with in vivo measurements. This layer reduces the amount of L-lactate that diffuses to the enzyme while not significantly limiting oxygen diffusion. The resulting L-lactate microelectrodes were linear to 20 mM (R2 = 0.997 +/- 0.001) and beyond in some cases with detection limits of 0.078 +/- 0.013 mM (n = 12). The selectivity and response time of these electrodes make them suitable for in vivo measurements in brain tissue. Self-referencing recordings may be utilized to further improve the selectivity of the recordings. However this is not necessary for most applications in the brain, because the resting and stimulated levels of dopamine (DA), norepinephrine (NE), and other potentially interfering cations are two to three orders of magnitude lower than that of in vivo L-lactate, which is in the millimolar range. Preliminary in vivo measures of L-lactate in the brain of anesthetized rats support that the microelectrodes are capable of measuring rapid endogenous changes in vivo.
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Affiliation(s)
- Jason J Burmeister
- Department of Anatomy, Center for Sensor Technology, The Morris K. Udall Parkinson's Disease Research Center of Excellence, University of Kentucky Chandler Medical Center, Room 306 Davis Mills Building, Lexington, KY 40536-0098, USA
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25
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Mehrvar M, Abdi M. Recent developments, characteristics, and potential applications of electrochemical biosensors. ANAL SCI 2004; 20:1113-26. [PMID: 15352497 DOI: 10.2116/analsci.20.1113] [Citation(s) in RCA: 112] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The objective of this study is to analyze the technical importance, performance, techniques, advantages, and disadvantages of the biosensors in general and of the electrochemical biosensors in particular. A product of reaction diffuses to the transducer in the first generation biosensors (based on Clark biosensors). The mediated biosensors or second generation biosensors use specific mediators between the reaction and the transducer to improve sensitivity. The second generation biosensors involve two steps: first, there is a redox reaction between enzyme and substrate that is reoxidized by the mediator, and eventually the mediator is oxidized by the electrode. No normal product or mediator diffusion is directly involved in the third generation biosensors, direct biosensors. Based on the type of transducer, current biosensors are divided into optical, mass, thermal, and electrochemical sensors. They are used in medical diagnostics, food quality controls, environmental monitoring, and other applications. These biosensors are also grouped under two broad categories of sensors: direct and indirect detection systems. Moreover, these systems could be further grouped into continuous or batch operation. Therefore, amperometric biosensors and their current applications are focused on more in detail since they are the most commonly used biosensors in monitoring and diagnosing tests in clinical analysis. Problems related to the commercialization of medical, environmental, and industrial biosensors as well as their performance characteristics, their competitiveness in comparison to the conventional analytical tools, and their costs determine the future development of these biosensors.
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Affiliation(s)
- Mehrab Mehrvar
- Department of Chemical Engineering, Ryerson University, Toronto, Ontario, M5B 2K3, Canada.
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26
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Kwan RCH, Hon PYT, Mak KKW, Renneberg R. Amperometric determination of lactate with novel trienzyme/poly(carbamoyl) sulfonate hydrogel-based sensor. Biosens Bioelectron 2004; 19:1745-52. [PMID: 15142609 DOI: 10.1016/j.bios.2004.01.008] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2003] [Revised: 01/13/2004] [Accepted: 01/14/2004] [Indexed: 11/30/2022]
Abstract
A novel trienzyme sensor for the amperometric determination of lactate was constructed by immobilizing salicylate hydroxylase (SHL, E.C. 1.14.13.1), l-lactate dehydrogenase (LDH, E.C. 1.1.1.27), and pyruvate oxidase (PyOD, E.C. 1.2.3.3) on a Clark-type oxygen electrode. The enzymes were entrapped by a poly(carbamoyl) sulfonate (PCS) hydrogel on a Teflon membrane. LDH catalyzes the specific dehydrogenation of lactate consuming NAD(+). SHL catalyzes the irreversible decarboxylation and the hydroxylation of salicylate in the presence of oxygen and NADH produced by LDH. PyOD decarboxylates pyruvate using oxygen and phosphate. SHL and PyOD force the equilibrium of dehydrogenation of lactate by LDH to the product side by consuming NADH and pyruvate, respectively. Dissolved oxygen acts as an essential material for both PyOD and SHL during their respective enzymatic reactions. Therefore, an amplified signal, caused by the consumptions of dissolved oxygen by the two enzymes, was observed in the measurement of lactate. Regeneration of cofactor was found in the trienzyme system. A Teflon membrane was used to fabricate the sensor in order to avoid interferences. The sensor has a fast response (2s) and short recovery times (2 min). The total test time for a measurement by using this lactate sensor (4 min) was faster than using a commercial lactate testing kit (up to 10 min). The sensor has a linear range between 10 and 400 microM lactate, with a detection limit of 4.3 microM. A good agreement (R2 = 0.9984) with a commercial lactate testing kit was obtained in beverage sample measurements.
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Affiliation(s)
- Roger C H Kwan
- Sino-German Nano-Analytical Lab (SiGNAL), Department of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China.
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27
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Chapter 3 Electrochemical biosensors. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s1061-8945(03)80005-3] [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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28
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Frost MC, Meyerhoff ME. Implantable chemical sensors for real-time clinical monitoring: progress and challenges. Curr Opin Chem Biol 2002; 6:633-41. [PMID: 12413548 DOI: 10.1016/s1367-5931(02)00371-x] [Citation(s) in RCA: 79] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Recently, progress has been made in the development of implantable chemical sensors capable of real-time monitoring of clinically important species such as PO(2), PCO(2), pH, glucose and lactate. The need for developing truly biocompatible materials for sensor fabrication remains the most significant challenge for achieving robust and reliable sensors capable of monitoring the real-time physiological status of patients.
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Affiliation(s)
- Megan C Frost
- Department of Chemistry, The University of Michigan, Ann Arbor 48109-1055, USA
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29
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Perdomo J, Hinkers H, Sundermeier C, Seifert W, Martínez Morell O, Knoll M. Miniaturized real-time monitoring system for L-lactate and glucose using microfabricated multi-enzyme sensors. Biosens Bioelectron 2001; 15:515-22. [PMID: 11419648 DOI: 10.1016/s0956-5663(00)00087-7] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
A miniaturized on-line monitoring system for the detection of L-lactate and glucose is presented. The system is based on a microfabricated multi-enzyme silicon sensor chip with flow channels integrated on the chip. The sensors were fabricated in containment technology. They were characterized in test solutions. The cross-talking behaviour was investigated and was found to be practically negligible. The linear measurement ranges of both glucose and lactate sensors were large enough for most practical applications. As a result of the miniaturization the analyte consumption could be reduced to a few nmol min(-1). The system was equipped with a microdialysis probe whose recovery was 45% for lactate and 37% for glucose in test solutions using a flow rate of 3 microl min(-1). Lower flow rates of 0.5 microl min(-1) resulted in recoveries of over 90%. The long-term stability of the system was acceptable. Initial measurements have also been performed in vitro using human blood serum.
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Affiliation(s)
- J Perdomo
- Centro de Investigaciones en Microelectrónica, Instituto Superior Politécnico Jose A. Echererria, Havana, Cuba
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Abstract
A needle-type lactate biosensor has been developed for continuous intravascular lactate monitoring. The sensor employs poly(1,3-phenylenediamine) as the inner layer on the platinum electrode in order to eliminate the interference from oxidizable physiological substances. Cross-linking with glutaraldehyde was used for enzyme immobilization. Dithiothreitol was used as the stabilizer of lactate oxidase. PVC (polyvinyl chloride) was chosen as the external diffusion control membrane. Sensor performance was evaluated in vitro and the sensor shows a sensitivity of 10-15 nA/mM, and a linear range from 1 mM to at least 15 mM lactate. Evaluation of the sensor response in blood plasma showed similar sensitivity and linear range as indicated by the calibration curves obtained in buffer solution. The sensor has a short response time of approximately 1 minute. The sensors were operated continuously for 7 days in phosphate buffer containing solution with a concentration at the physiological lactate level. No significant change in sensor sensitivity and its linear range has been observed. Sensors show a minimum change in its performance when stored in buffer at 4 degrees C for at least 9 months.
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Affiliation(s)
- Q Yang
- Chemical and Nuclear Engineering Department, University of New Mexico, Albuquerque 87131, USA
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31
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Perdomo J, Sundermeier C, Hinkers H, Martínez Morell O, Seifert W, Knoll M. Containment sensors for the determination of L-lactate and glucose. Biosens Bioelectron 1999; 14:27-32. [PMID: 10028646 DOI: 10.1016/s0956-5663(98)00104-3] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This paper reports some new results on enzyme based silicon containment sensors. For the first time an L-lactate sensor in containment technology is presented. Through optimization of the buffer system the stability of the lactate sensor was enhanced and the linear response of over 10 mM was achieved. The glucose sensor has also been optimized for a large linear measurement range exceeding 30 mM. A two-enzyme chip with glucose and lactate sensor elements which were integrated on one silicon chip is presented. The response behaviour of the two-enzyme chip was very similar to the single chip behaviour. No cross-talking effects could be observed. A fabrication process for mass-production is described.
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Affiliation(s)
- J Perdomo
- Fachhochschule Muenster, Steinfurt, Germany
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32
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