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Nishitani S, Tran T, Puglise A, Yang S, Landry MP. Engineered Glucose Oxidase-Carbon Nanotube Conjugates for Tissue-Translatable Glucose Nanosensors. Angew Chem Int Ed Engl 2024; 63:e202311476. [PMID: 37990059 PMCID: PMC11003487 DOI: 10.1002/anie.202311476] [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] [Received: 08/07/2023] [Revised: 10/22/2023] [Accepted: 11/21/2023] [Indexed: 11/23/2023]
Abstract
Continuous and non-invasive glucose monitoring and imaging is important for disease diagnosis, treatment, and management. However, glucose monitoring remains a technical challenge owing to the dearth of tissue-transparent glucose sensors. In this study, we present the development of near-infrared fluorescent single-walled carbon nanotube (SWCNT) based nanosensors directly functionalized with glucose oxidase (GOx) capable of immediate and reversible glucose imaging in biological fluids and tissues. We prepared GOx-SWCNT nanosensors by facile sonication of SWCNT with GOx in a manner that-surprisingly-does not compromise the ability of GOx to detect glucose. Importantly, we find by using denatured GOx that the fluorescence modulation of GOx-SWCNT is not associated with the catalytic oxidation of glucose but rather triggered by glucose-GOx binding. Leveraging the unique response mechanism of GOx-SWCNT nanosensors, we developed catalytically inactive apo-GOx-SWCNT that enables both sensitive and reversible glucose imaging, exhibiting a ΔF/F0 of up to 40 % within 1 s of exposure to glucose without consuming the glucose analyte. We finally demonstrate the potential applicability of apo-GOx-SWCNT in biomedical applications by glucose quantification in human plasma and glucose imaging in mouse brain slices.
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Affiliation(s)
- Shoichi Nishitani
- Department of Chemical and Biomolecular Engineering, University of California, 94720, Berkeley, CA, USA
| | - Tiffany Tran
- Department of Chemical and Biomolecular Engineering, University of California, 94720, Berkeley, CA, USA
| | - Andrew Puglise
- Department of Chemical and Biomolecular Engineering, University of California, 94720, Berkeley, CA, USA
| | - Sounghyun Yang
- Department of Chemical and Biomolecular Engineering, University of California, 94720, Berkeley, CA, USA
| | - Markita P Landry
- Department of Chemical and Biomolecular Engineering, University of California, 94720, Berkeley, CA, USA
- Innovative Genomics Institute (IGI), 94720, Berkeley, CA, USA
- California Institute for Quantitative Biosciences, QB3, University of California, 94720, Berkeley, CA, USA
- Chan-Zuckerberg Biohub, 94158, San Francisco, CA, USA
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2
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Xylanase covalent binding onto amidated pectin beads: Optimization, thermal, operational and storage stability studies and application. Int J Biol Macromol 2023; 236:124018. [PMID: 36921821 DOI: 10.1016/j.ijbiomac.2023.124018] [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: 12/31/2022] [Revised: 03/04/2023] [Accepted: 03/08/2023] [Indexed: 03/15/2023]
Abstract
Amidated pectin-polyethylene imine-glutaraldehyde (AP-PEI-GA) immobilizer was prepared. The ideal protocol that should be adopted during the immobilizer preparation was investigated via Box-Behnken design (BBD), and it comprised processing the AP beads with 3.4 % (w/w) PEI solution of pH 9.65 followed by 5.96 % (v/v) GA solution. The obtained AP-PEI-GA immobilizer was efficient, and it acquired 3.03 U.g-1 of immobilized xylanase (im-xylanase) activity. The computed Km and Vmax values for AP-PEI-GA im-xylanase were 16.67 mg.ml-1 and 20 g.ml-1.min-1, respectively. Through covalent coupling to AP-PEI-GA, Aspergillus niger xylanase thermodynamic properties T1/2 and D-values were increased by 2.05, 3.08, and 1.35 at 40, 50, and 60 °C, respectively. ΔHd and ΔGd for AP-PEI-GA im-xylanase at 40, 50, and 60 °C were higher than those for free form emphasizing more resistance to thermal denaturation. Im-xylanase showed 100 % activity for 20 successive cycles and hydrolyzed different agro-industrial wastes into reducing sugar and xylooligosaccharides (XOS) with more efficiency on pea peel (PP). AP-PEI-GA im-xylanase, PP weight, and hydrolysis time that should be adopted to obtain the highest reducing sugar and XOS yield were optimized through central composite design (CCD). Extracted XOS showed prebiotic and anti-oxidant activities.
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Apiratmateekul N, Duanginta W, Phetree M, Kongros K, Treebuphachatsakul W. Effects of Simulated Adverse Environmental Conditions Related to Actual Conditions at Health Promoting Hospitals on the Performance of Blood Glucose Testing by Glucose Meters. J Diabetes Sci Technol 2023; 17:125-132. [PMID: 34515537 PMCID: PMC9846385 DOI: 10.1177/19322968211042343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Annual peaks in temperature and humidity exceed manufacturers' specifications for blood glucose test strip storage in Thailand. Health Promoting Hospitals (HPH) do not always provide the same level of health services that hospitals do since they often only turn on air-conditioning units during working hours. METHODS The blood glucose testing performance of 4 glucose meters were investigated for short and long terms stress at 5 simulated conditions. Temperature and relative humidity (RH) at 5 HPHs in different regions of Thailand were monitored for 9 weeks during April to July 2019. The use of air conditioning in storage rooms for storing test strips was surveyed at 131 HPHs using questionnaires. RESULTS Median-paired differences of glucose measurements with stressed test strips in 5 simulated conditions significantly differed (P < 0.05) both in the short term (3 days) and in the long term (30 days) with 4 glucose meters when compared to unstressed test strips. The average temperature of all HPHs exceeded 30°C (86°F). The average RH was 84%. There was only one HPH that occasionally turned on its air conditioners. Most HPHs kept both opened and unopened vials of test strips in rooms without air conditioners. Further, 21.4-32.0% of HPHs kept test strips at room with air conditioners. CONCLUSIONS This study provides evidence for poor performance of blood glucose testing by glucose meters that are affected by adverse environmental conditions. The environmental for test strips storage at HPHs should be considered to prevent analytical errors of glucose measurement.
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Affiliation(s)
- Napaporn Apiratmateekul
- Department of Medical Technology,
Naresuan University, Muang, Phitsanulok, Thailand
- Reference Material and Medical
Laboratory Innovation Research Unit, Faculty of Allied Health Sciences, Naresuan
University, Muang, Phitsanulok, Thailand
| | - Wanutchaya Duanginta
- Reference Material and Medical
Laboratory Innovation Research Unit, Faculty of Allied Health Sciences, Naresuan
University, Muang, Phitsanulok, Thailand
| | - Methawadee Phetree
- Reference Material and Medical
Laboratory Innovation Research Unit, Faculty of Allied Health Sciences, Naresuan
University, Muang, Phitsanulok, Thailand
| | - Kunchit Kongros
- Department of Medical Technology,
Naresuan University, Muang, Phitsanulok, Thailand
- Reference Material and Medical
Laboratory Innovation Research Unit, Faculty of Allied Health Sciences, Naresuan
University, Muang, Phitsanulok, Thailand
| | - Wanvisa Treebuphachatsakul
- Department of Medical Technology,
Naresuan University, Muang, Phitsanulok, Thailand
- Reference Material and Medical
Laboratory Innovation Research Unit, Faculty of Allied Health Sciences, Naresuan
University, Muang, Phitsanulok, Thailand
- Medical Device Research Laboratory,
Division of Research and Innovation, Naresuan University, Muang, Phitsanulok,
Thailand
- Wanvisa Treebuphachatsakul, Naresuan
University, 99 Moo 9, Muang, Phitsanulok 65000, Thailand.
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4
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Ivanova IA, Ershova MO, Shumov ID, Valueva AA, Ivanov YD, Pleshakova TO. Atomic Force Microscopy Study of the Temperature and Storage Duration Dependencies of Horseradish Peroxidase Oligomeric State. Biomedicines 2022; 10:biomedicines10102645. [PMID: 36289907 PMCID: PMC9599489 DOI: 10.3390/biomedicines10102645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 10/14/2022] [Accepted: 10/18/2022] [Indexed: 11/16/2022] Open
Abstract
This paper presents an investigation of the temperature dependence of the oligomeric state of the horseradish peroxidase (HRP) enzyme on the temperature of its solution, and on the solution storage time, at the single-molecule level. Atomic force microscopy has been employed to determine how the temperature and the storage time of the HRP solution influence its aggregation upon direct adsorption of the enzyme from the solution onto bare mica substrates. In parallel, spectrophotometric measurements have been performed in order to estimate whether the HRP enzymatic activity changes over time upon the storage of the enzyme solution. The temperature dependence of the HRP oligomeric state has been studied within a broad (15–40 °C) temperature range. It has been demonstrated that the storage of the HRP solution for 14 days does not have any considerable effect on the oligomeric state of the enzyme, neither does it affect its activity. At longer storage times, AFM has allowed us to reveal a tendency of HRP to oligomerization during the storage of its buffered solution, while the enzymatic activity remains virtually unchanged even after a 1-month-long storage. By AFM, it has been revealed that after the incubation of a mica substrate in the HRP solution at various temperatures, the content of the mica-adsorbed oligomers increases insignificantly owing to a high-temperature stability of the enzyme.
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Masakari Y, Hara C, Nakazawa H, Ichiyanagi A, Umetsu M. Comparison of the stability of Mucor-derived flavin adenine dinucleotide-dependent glucose dehydrogenase and glucose oxidase. J Biosci Bioeng 2022; 134:307-310. [PMID: 35927131 DOI: 10.1016/j.jbiosc.2022.06.017] [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: 05/09/2022] [Revised: 06/14/2022] [Accepted: 06/30/2022] [Indexed: 10/16/2022]
Abstract
Long-term stability at near-body temperature is important for continuous glucose monitoring (CGM) sensors. However, the stability of enzymes used in CGM sensors has often been evaluated by measuring their melting temperature (Tm) values and by short heat treatment but not at around 37 °C. Glucose oxidase (GOD) is used in current CGM sensors. In this study, we evaluated the stability of modified Mucor-derived flavin adenine dinucleotide-dependent glucose dehydrogenase (designated Mr144-297) with improved thermal stability at medium to high temperatures and compared it with that of GOD. The Tm value of Mr144-297 was 61.6 ± 0.3 °C and was similar to that of GOD (61.4 ± 1.2 °C). However, Mr144-297 was clearly more stable than GOD at 40 °C and 55 °C. At 37 °C, the stability of a carbon electrode with immobilized Mr144-297 was higher than that of an electrode with GOD. Our data indicate that Mr144-297 is a more suitable enzyme for CGM sensors than is GOD.
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Affiliation(s)
- Yosuke Masakari
- Research and Development Division, Kikkoman Corporation, 338 Noda, Noda City, Chiba 278-0037, Japan; Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan.
| | - Chiaki Hara
- Research and Development Division, Kikkoman Corporation, 338 Noda, Noda City, Chiba 278-0037, Japan
| | - Hikaru Nakazawa
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
| | - Atsushi Ichiyanagi
- Research and Development Division, Kikkoman Corporation, 338 Noda, Noda City, Chiba 278-0037, Japan
| | - Mitsuo Umetsu
- Department of Biomolecular Engineering, Graduate School of Engineering, Tohoku University, 6-6-11 Aoba, Aramaki, Aoba-ku, Sendai, Miyagi 980-8579, Japan
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6
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Zubkovs V, Wang H, Schuergers N, Weninger A, Glieder A, Cattaneo S, Boghossian AA. Bioengineering a glucose oxidase nanosensor for near-infrared continuous glucose monitoring. NANOSCALE ADVANCES 2022; 4:2420-2427. [PMID: 35746900 PMCID: PMC9154020 DOI: 10.1039/d2na00092j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 04/30/2022] [Indexed: 05/14/2023]
Abstract
Single-walled carbon nanotubes (SWCNTs) emit photostable near-infrared (NIR) fluorescence that is conducive for optical glucose monitoring. Such SWCNT-based optical sensors often require the immobilization of proteins that can confer glucose selectivity and reactivity. In this work, we immobilize a glucose-reactive enzyme, glucose oxidase (GOx), onto SWCNTs using a N-(1-pyrenyl)maleimide (PM) crosslinker via thiol bioconjugation of engineered cysteine residues. We compare the conjugation of several glucose oxidase variants containing rationally-engineered cysteines and identify a D70C variant that shows effective bioconjugation. The bioconjugation was characterized through both absorption and fluorescence spectroscopy. Furthermore, we demonstrate an application for continuous glucose monitoring in the NIR-II optical region using the bioconjugated reaction solution, which shows a reversible response to physiological concentrations of glucose. Finally, we develop a miniaturized NIR-II reader to be used for cell cultures that require continuous glucose monitoring.
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Affiliation(s)
- Vitalijs Zubkovs
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Chemical Sciences and Engineering CH-1015 Lausanne Switzerland
- Swiss Center for Electronics and Microtechnology (CSEM) Landquart Switzerland
| | - Hanxuan Wang
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Chemical Sciences and Engineering CH-1015 Lausanne Switzerland
| | - Nils Schuergers
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Chemical Sciences and Engineering CH-1015 Lausanne Switzerland
- Institute of Biology III, University of Freiburg Freiburg Germany
| | - Astrid Weninger
- Institute of Molecular Biotechnology, Graz University of Technology Graz Austria
| | - Anton Glieder
- Institute of Molecular Biotechnology, Graz University of Technology Graz Austria
- bisy GmbH Hofstaetten Austria
| | - Stefano Cattaneo
- Swiss Center for Electronics and Microtechnology (CSEM) Landquart Switzerland
| | - Ardemis A Boghossian
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Chemical Sciences and Engineering CH-1015 Lausanne Switzerland
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Glucose Oxidase, an Enzyme “Ferrari”: Its Structure, Function, Production and Properties in the Light of Various Industrial and Biotechnological Applications. Biomolecules 2022; 12:biom12030472. [PMID: 35327664 PMCID: PMC8946809 DOI: 10.3390/biom12030472] [Citation(s) in RCA: 35] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/14/2022] [Accepted: 03/17/2022] [Indexed: 01/25/2023] Open
Abstract
Glucose oxidase (GOx) is an important oxidoreductase enzyme with many important roles in biological processes. It is considered an “ideal enzyme” and is often called an oxidase “Ferrari” because of its fast mechanism of action, high stability and specificity. Glucose oxidase catalyzes the oxidation of β-d-glucose to d-glucono-δ-lactone and hydrogen peroxide in the presence of molecular oxygen. d-glucono-δ-lactone is sequentially hydrolyzed by lactonase to d-gluconic acid, and the resulting hydrogen peroxide is hydrolyzed by catalase to oxygen and water. GOx is presently known to be produced only by fungi and insects. The current main industrial producers of glucose oxidase are Aspergillus and Penicillium. An important property of GOx is its antimicrobial effect against various pathogens and its use in many industrial and medical areas. The aim of this review is to summarize the structure, function, production strains and biophysical and biochemical properties of GOx in light of its various industrial, biotechnological and medical applications.
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8
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Characteristics of glucose oxidase immobilized on carbon-encapsulated iron nanoparticles decorated with polyethyleneimine. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04125-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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9
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Smartphone-Based Chemiluminescent Origami µPAD for the Rapid Assessment of Glucose Blood Levels. BIOSENSORS-BASEL 2021; 11:bios11100381. [PMID: 34677337 PMCID: PMC8533763 DOI: 10.3390/bios11100381] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/02/2021] [Accepted: 10/04/2021] [Indexed: 12/11/2022]
Abstract
Microfluidic paper analytical devices (µPADs) represent one of the most appealing trends in the development of simple and inexpensive analytical systems for diagnostic applications at the point of care (POC). Herein, we describe a smartphone-based origami µPAD for the quantitative determination of glucose in blood samples based on the glucose oxidase-catalyzed oxidation of glucose leading to hydrogen peroxide, which is then detected by means of the luminol/hexacyanoferrate(III) chemiluminescent (CL) system. By exploiting the foldable µPAD format, a two-step analytical procedure has been implemented. First, the diluted blood sample was added, and hydrogen peroxide was accumulated, then the biosensor was folded, and a transport buffer was added to bring hydrogen peroxide in contact with CL reagents, thus promoting the CL reaction. To enable POC applicability, the reagents required for the assay were preloaded in the µPAD so that no chemicals handling was required, and a 3D-printed portable device was developed for measuring the CL emission using the smartphone’s CMOS camera. The µPAD was stable for 30-day storage at room temperature and the assay, displaying a limit of detection of 10 µmol L−1, proved able to identify both hypoglycemic and hyperglycemic blood samples in less than 20 min.
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10
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Sun Y, Gao G, Cai T. Enzymatic characterization of D-lactate dehydrogenase and application in alanine aminotransferase activity assay kit. Bioengineered 2021; 12:6459-6471. [PMID: 34516347 PMCID: PMC8806867 DOI: 10.1080/21655979.2021.1972781] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
D-lactate dehydrogenase (D-LDH) is widely used for the clinical detection of alanine aminotransferase (ALT) activity. It is a key enzyme in ALT detection kits, and its enzymatic properties directly determine sensitivity and accuracy of such kits. In this study, D-lactate dehydrogenase (WP_011543503, ldLDH) coding sequence derived from Lactobacillus delbrueckii was obtained from the NCBI database by gene mining. LdLDH was expressed and purified in Escherichia coli, and its enzyme activity, kinetic parameters, optimum temperature, and pH were characterized. Furthermore, stabilizers, including sugars, polyols, amino acids, certain salts, proteins, and polymers, were screened to improve stability of ldLDH during freeze-drying and storage. Finally, a kit based on ldLDH was tested to determine whether the enzyme had potential clinical applications. The results showed that ldLDH had a specific activity of 1,864 U/mg, Km value of 1.34 mM, optimal reaction temperature of 55°C, and an optimal pH between 7.0 and 7.5. When sucrose or asparagine was used as a stabilizer, freeze-dried ldLDH remained stable at 37°C for > 2 months without significant loss of enzymatic activity. These results indicated that ldLDH possesses high activity and stability. Test results using the ALT assay kit prepared with ldLDH were consistent with those of commercial kits, with a relative deviation <5%. These results indicated that ldLDH met the primary requirements for ALT assays, laying a foundation for the development of new ALT kits with potential clinical applications.
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Affiliation(s)
- Yi Sun
- Department of Clinical Laboratory, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China.,Department of Research, Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Ningbo, China.,Key Laboratory of Diagnosis and Treatment of Digestive System Tumors of Zhejiang Province, Ningbo, China
| | - Guosheng Gao
- Department of Clinical Laboratory, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China.,Department of Research, Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Ningbo, China.,Key Laboratory of Diagnosis and Treatment of Digestive System Tumors of Zhejiang Province, Ningbo, China
| | - Ting Cai
- Department of Research, Ningbo Institute of Life and Health Industry, University of Chinese Academy of Sciences, Ningbo, China.,Key Laboratory of Diagnosis and Treatment of Digestive System Tumors of Zhejiang Province, Ningbo, China.,Department of Emergency, HwaMei Hospital, University of Chinese Academy of Sciences, Ningbo, China
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11
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Wu CY, Hsu YH, Chen Y, Yang LC, Tseng SC, Chen WR, Huang CC, Wan D. Robust O 2 Supplementation from a Trimetallic Nanozyme-Based Self-Sufficient Complementary System Synergistically Enhances the Starvation/Photothermal Therapy against Hypoxic Tumors. ACS APPLIED MATERIALS & INTERFACES 2021; 13:38090-38104. [PMID: 34342219 DOI: 10.1021/acsami.1c10656] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Much effort has been focused on novel nanomedicine for cancer therapy. However, tumor hypoxia limits the efficacy of various cancer therapeutics. Herein, we constructed a self-sufficient hybrid enzyme-based silk fibroin hydrogel system, consisting of Pt-decorated hollow Ag-Au trimetallic nanocages (HGN@Pt) and glucose oxidase (GOx), to supply O2 continuously and consume glucose concurrently and, thereby, synergistically enhance the anti-cancer efficacy of a combined starvation and photothermal therapy operating in a hypoxic tumor microenvironment. Thanks to the cooperative effects of the active surface atoms (resulting from the island-like features of the Pt coating), the intrinsically hollow structure, and the strain effect induced by the trimetallic composition, HGN@Pt displayed efficient catalase-like activity. The enhancement in the generation of O2 through the decomposition of H2O2 mediated by the as-designed nanozyme was greater than 400% when compared with that of hollow Ag-Pt bimetallic nanospheres or tiny Pt nanoparticles. Moreover, in the presence of HGN@Pt, significant amounts of O2 could be generated within a few minutes, even in an acidic buffer solution (pH 5.8-6.5) containing a low concentration of H2O2 (100-500 μM). Because HGN@Pt exhibited a strong surface plasmon resonance peak in the near-infrared wavelength range, it could be used as a photothermal agent for hyperthermia therapy. Furthermore, GOx was released gradually from the SF hydrogel into the tumor microenvironment to mediate the depletion of glucose, leading to glucose starvation-induced cancer cell death. Finally, the O2 supplied by HGN@Pt overcame the hypoxia of the microenvironment and, thereby, promoted the starvation therapeutic effect of the GOx-mediated glucose consumption. Meanwhile, the GOx-produced H2O2 from the oxidation of glucose could be used to regenerate O2 and, thereby, construct a complementary circulatory system. Accordingly, this study presents a self-sufficient hybrid enzyme-based system that synergistically alleviates tumor hypoxia and induces an anti-cancer effect when combined with irradiation of light from a near-infrared laser.
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Affiliation(s)
- Cheng-Yun Wu
- Institute of Biomedical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
| | - Yu-Hsuan Hsu
- Institute of Biomedical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
| | - Yunching Chen
- Institute of Biomedical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
| | - Ling-Chu Yang
- Institute of Biomedical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
| | - Shao-Chin Tseng
- Experimental Facility Division, National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Wan-Ru Chen
- Institute of Biomedical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
| | - Chieh-Cheng Huang
- Institute of Biomedical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
| | - Dehui Wan
- Institute of Biomedical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
- Frontier Research Center on Fundamental and Applied Sciences of Matters, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu 300044, Taiwan
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12
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Fabregat G, Lanzalaco S, Aït Saïd J, Muñoz-Pascual X, Llorca J, Alemán C. Immobilization of glucose oxidase on plasma-treated polyethylene for non-invasive glucose detection. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115509] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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13
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Purushothaman K, Bhat SK, Siddappa S, Singh SA, Subbaiah R, Marathe GK, Rao G Appu Rao A. Aspartic protease-pepstatin A interactions: Structural insights on the thermal inactivation mechanism. Biochimie 2021; 189:26-39. [PMID: 34116131 DOI: 10.1016/j.biochi.2021.06.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 05/31/2021] [Accepted: 06/04/2021] [Indexed: 11/19/2022]
Abstract
Aspartic proteases are the targets for structure-based drug design for their role in physiological processes and pharmaceutical applications. Structural insights into the thermal inactivation mechanism of an aspartic protease in presence and absence of bound pepstatin A have been obtained by kinetics of thermal inactivation, CD, fluorescence spectroscopy and molecular dynamic simulations. The irreversible thermal inactivation of the aspartic protease comprised of loss of tertiary and secondary structures succeeded by the loss of activity, autolysis and aggregation The enthalpy and entropy of thermal inactivation of the enzyme in presence of pepstatin A increased from 81.2 to 148.5 kcal mol-1, and from 179 to 359 kcal mol-1 K-1 respectively. Pepstatin A shifted the mid-point of thermal inactivation of the protease from 58 °C to 77 °C. The association constant (K) for pepstatin A with aspartic protease was 2.5 ± 0.3 × 10 5 M-1 and ΔGo value was -8.3 kcal mol-1. Molecular dynamic simulation studies were able to delineate the role of pepstatin A in stabilizing backbone conformation and side chain interactions. In the Cα-backbone, the short helical segments and the conserved glycines were part of the most unstable segments of the protein. Understanding the mechanism of thermal inactivation has the potential to develop re-engineered thermostable proteases.
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Affiliation(s)
- Kavya Purushothaman
- Kaypeeyes Biotech Private Limited, R&D Center, Hebbal Industrial Area, Mysuru, 570016, Karnataka, India; Department of Studies in Biochemistry, University of Mysore, Manasagangothri, Mysuru, 570006, Karnataka, India
| | - Sagar Krishna Bhat
- Kaypeeyes Biotech Private Limited, R&D Center, Hebbal Industrial Area, Mysuru, 570016, Karnataka, India
| | - Shiva Siddappa
- Department of Studies in Biochemistry, University of Mysore, Manasagangothri, Mysuru, 570006, Karnataka, India
| | - Sridevi Annapurna Singh
- Department of Protein Chemistry and Technology, CSIR-CFTRI, Mysuru, 570020, Karnataka, India
| | - Roopashree Subbaiah
- Department of Biochemistry, Yuvaraja College, University of Mysore, 570020, India
| | - Gopal Kedihithlu Marathe
- Department of Studies in Biochemistry, University of Mysore, Manasagangothri, Mysuru, 570006, Karnataka, India; Department of Studies in Molecular Biology, University of Mysore, Manasagangothri, Mysuru, 570006, Karnataka, India
| | - Appu Rao G Appu Rao
- Kaypeeyes Biotech Private Limited, R&D Center, Hebbal Industrial Area, Mysuru, 570016, Karnataka, India.
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14
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Zaman U, Naz R, Khattak NS, Rehman KU, Saeed A, Farooq M, Sahar J, Iqbal A. Kinetic and thermodynamic studies of novel acid phosphates extracted from Cichorium intybus seedlings. Int J Biol Macromol 2021; 168:195-204. [PMID: 33309659 DOI: 10.1016/j.ijbiomac.2020.12.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 12/03/2020] [Accepted: 12/05/2020] [Indexed: 11/24/2022]
Abstract
Herein for the first time a novel acid phosphatase from the seedlings of Cichorium intybus was purified to homogeneity by using various chromatographic techniques (salt precipitation, ion exchange, size exclusion and affinity chromatography) and thermodynamically characterized. The molecular mass of purified enzyme (66 kDa) was determined by SDS-PAGE under denaturing and non-denaturing conditions and by gel-filtration confirmed as dimer of molecular mass 130 kDa. The Michaelis-Menten (Km) constant for -p-NPP (0.3 mM) and (7.6 μmol/min/mg) Vmax. The enzyme was competitively inhibited by phosphate, molybdate and vanadate. Phenyl phosphate, ɑ and β-glycero-phosphate and-p-NPP were found to be good substrate. When temperature increased from (55 °C to 75 °C), the deactivation rate constant (kd) was increased (0.1 to 4.6 min-1) and half- life was decreased from 630 min to 15 min. Various thermal denaturation parameters; change in enthalpy (ΔH°), change in entropy (ΔS°) and change in free energy (ΔG°) were found 121.93 KJ·mol-1, 72.45 KJ·mol-1 and 98.08 KJ·mol-1 respectively, confirming that acid phosphatase undergoes a significant process of unfolding during deactivation. The biochemical properties of acid phosphatase from C. intybus on the behalf of biological activity and its relationship to pH variations, thermal deactivation and kinetics parameters provide an insight into its novel features.
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Affiliation(s)
- Umber Zaman
- Institute of Chemical Science, Gomal University, Dera Ismail Khan 29050, Pakistan
| | - Rubina Naz
- Institute of Chemical Science, Gomal University, Dera Ismail Khan 29050, Pakistan
| | - Noor Saeed Khattak
- Center for Materials Science, Islamia College University, 25120, Pakistan.
| | - Khalil Ur Rehman
- Institute of Chemical Science, Gomal University, Dera Ismail Khan 29050, Pakistan
| | - Asma Saeed
- Department of Biological Sciences, Gomal University, Dera Ismail Khan 29050, Pakistan
| | - Muhammad Farooq
- National Center of Excellence in Physical Chemistry, University of Peshawar, 25120, Pakistan
| | - Juma Sahar
- National Center of Excellence in Physical Chemistry, University of Peshawar, 25120, Pakistan
| | - Anwar Iqbal
- Department of Chemical Sciences, University of Lakki Marwat, KPK, Pakistan
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15
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Shende P, Sahu P. Enzyme bioconjugated PAMAM dendrimers for estimation of glucose in saliva. INT J POLYM MATER PO 2020. [DOI: 10.1080/00914037.2020.1725762] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Pravin Shende
- Shobhaben Pratapbhai Patel School of Pharmacy and Technology Management, SVKM’s NMIMS, Mumbai, India
| | - Pratiksha Sahu
- Shobhaben Pratapbhai Patel School of Pharmacy and Technology Management, SVKM’s NMIMS, Mumbai, India
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16
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Agazzi ML, Herrera SE, Cortez ML, Marmisollé WA, Tagliazucchi M, Azzaroni O. Insulin Delivery from Glucose‐Responsive, Self‐Assembled, Polyamine Nanoparticles: Smart “Sense‐and‐Treat” Nanocarriers Made Easy. Chemistry 2020; 26:2456-2463. [DOI: 10.1002/chem.201905075] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Indexed: 12/25/2022]
Affiliation(s)
- Maximiliano L. Agazzi
- Instituto de Investigaciones Fisicoquímicas Teóricas y, Aplicadas Facultad de Ciencias ExactasUniversidad Nacional de La, Plata-CONICET Sucursal 4, Casilla de Correo 16 1900 La Plata Argentina
| | - Santiago E. Herrera
- Instituto de Investigaciones Fisicoquímicas Teóricas y, Aplicadas Facultad de Ciencias ExactasUniversidad Nacional de La, Plata-CONICET Sucursal 4, Casilla de Correo 16 1900 La Plata Argentina
| | - M. Lorena Cortez
- Instituto de Investigaciones Fisicoquímicas Teóricas y, Aplicadas Facultad de Ciencias ExactasUniversidad Nacional de La, Plata-CONICET Sucursal 4, Casilla de Correo 16 1900 La Plata Argentina
| | - Waldemar A. Marmisollé
- Instituto de Investigaciones Fisicoquímicas Teóricas y, Aplicadas Facultad de Ciencias ExactasUniversidad Nacional de La, Plata-CONICET Sucursal 4, Casilla de Correo 16 1900 La Plata Argentina
| | - Mario Tagliazucchi
- Departamento de Química Inorgánica, Analítica y Química FísicaINQUIMAE-CONICETFacultad de Ciencias Exactas y NaturalesCiudad Universitaria Pabellón 2 Buenos Aires C1428EHA Argentina
| | - Omar Azzaroni
- Instituto de Investigaciones Fisicoquímicas Teóricas y, Aplicadas Facultad de Ciencias ExactasUniversidad Nacional de La, Plata-CONICET Sucursal 4, Casilla de Correo 16 1900 La Plata Argentina
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17
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Shin S, Kim HS, Kim MI, Lee J, Park HG, Kim J. Crowding and confinement effects on enzyme stability in mesoporous silicas. Int J Biol Macromol 2020; 144:118-126. [DOI: 10.1016/j.ijbiomac.2019.12.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 12/02/2019] [Accepted: 12/04/2019] [Indexed: 11/26/2022]
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18
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Kim I, Kim C, Lee D, Lee SW, Lee G, Yoon DS. A bio-inspired highly selective enzymatic glucose sensor using a red blood cell membrane. Analyst 2020; 145:2125-2132. [DOI: 10.1039/c9an02421b] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Red blood cell membrane (RBCM) was coated onto the enzymatic glucose sensor. The permeability of RBCM was optimized by controlling the thickness. Intriguingly, the sensor was highly accurate, despite the existence of various interfering molecules.
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Affiliation(s)
- Insu Kim
- School of Biomedical Engineering
- Korea University
- Seoul 02841
- Republic of Korea
| | - Chaeyeon Kim
- School of Biomedical Engineering
- Korea University
- Seoul 02841
- Republic of Korea
| | - Dongtak Lee
- School of Biomedical Engineering
- Korea University
- Seoul 02841
- Republic of Korea
| | - Sang Won Lee
- School of Biomedical Engineering
- Korea University
- Seoul 02841
- Republic of Korea
| | - Gyudo Lee
- Department of Biotechnology and Bioinformatics
- Korea University
- Sejong 30019
- Republic of Korea
| | - Dae Sung Yoon
- School of Biomedical Engineering
- Korea University
- Seoul 02841
- Republic of Korea
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19
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Biochemical, Thermodynamic and Kinetic Characterization of Glucose Oxidase Purified from Pseudomonas and Actinomyces spp. from Natural Sources. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2019. [DOI: 10.22207/jpam.13.4.60] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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20
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Ji D, Oey I, Agyei D. Purification, characterization and thermal inactivation kinetics of β-galactosidase from Lactobacillus leichmannii 313. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.108545] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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21
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Improvement in the thermal stability of Mucor prainii-derived FAD-dependent glucose dehydrogenase via protein chimerization. Enzyme Microb Technol 2019; 132:109387. [PMID: 31731974 DOI: 10.1016/j.enzmictec.2019.109387] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2019] [Revised: 07/28/2019] [Accepted: 07/30/2019] [Indexed: 11/23/2022]
Abstract
FAD-dependent glucose dehydrogenase (FAD-GDH, EC 1.1.5.9) is an enzyme utilized industrially in glucose sensors. Previously, FAD-GDH isolated from Mucor prainii (MpGDH) was demonstrated to have high substrate specificity for glucose. However, MpGDH displays poor thermostability and is inactivated after incubation at 45 °C for only 15 min, which prevents its use in industrial applications, especially in continuous glucose monitoring (CGM) systems. Therefore, in this study, a chimeric MpGDH (Mr144-297) was engineered from the glucose-specific MpGDH and the highly thermostable FAD-GDH obtained from Mucor sp. RD056860 (MrdGDH). Mr144-297 demonstrated significantly higher heat resistance, with stability at even 55 °C. In addition, Mr144-297 maintained both high affinity and accurate substrate specificity for D-glucose. Furthermore, eight mutation sites that contributed to improved thermal stability and increased productivity in Escherichia coli were identified. Collectively, chimerization of FAD-GDHs can be an effective method for the construction of an FAD-GDH with greater stability, and the chimeric FAD-GDH described herein could be adapted for use in continuous glucose monitoring sensors.
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22
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Nowroozi-Nejad Z, Bahramian B, Hosseinkhani S. Efficient immobilization of firefly luciferase in a metal organic framework: Fe-MIL-88(NH2) as a mighty support for this purpose. Enzyme Microb Technol 2019; 121:59-67. [DOI: 10.1016/j.enzmictec.2018.10.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Revised: 10/13/2018] [Accepted: 10/26/2018] [Indexed: 01/07/2023]
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23
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Fernandes AC, Petersen B, Møller L, Gernaey KV, Krühne U. Caught in-between: System for in-flow inactivation of enzymes as an intermediary step in "plug-and-play" microfluidic platforms. N Biotechnol 2018; 47:39-49. [PMID: 29684658 DOI: 10.1016/j.nbt.2018.04.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2017] [Revised: 04/15/2018] [Accepted: 04/16/2018] [Indexed: 01/16/2023]
Abstract
The need for fast and comprehensive characterization of biocatalysts has pushed the development of new screening platforms based on microfluidics, capable of monitoring several parameters simultaneously, with new configurations of liquid handling, sample treatment and sensing. Modular microfluidics allows the integration of these newly developed approaches in a more flexible way towards increasing applicability of the microfluidic chips to different types of biocatalysts and reactions. A highly relevant operation in such a system is biocatalyst inactivation, which can enable the precise control of reaction time by avoiding the continuation of the reaction in another module or connecting tubes. Such control is important when different modules of reactors and/or sensing units are used and changed frequently. Here we describe the development, characterization and application of a module for rapid enzyme inactivation. The thermal inactivation platform developed is compared with a standard benchtop ThermoMixer in terms of inactivation efficiency for glucose oxidase and catalase. A higher activity loss was observed for enzyme inactivation under flow conditions (inactivation achieved at 120 s residence time at 338 K and 20 s residence time at 353 K) which indicated a high heat transfer to the fluid under dynamic conditions. Moreover, partial deactivation of the enzymes was observed for the continuous thermal inactivation module, when activity measurements were performed after 1 and 2 days following inactivation. The thermal inactivation unit presented can be easily integrated into modular microfluidic platforms and can be a useful addition for enzyme characterization and screening.
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Affiliation(s)
- Ana C Fernandes
- Process and Systems Engineering Center (PROSYS), Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, 2800 Kgs. Lyngby, Denmark.
| | - Benjamin Petersen
- Kemiteknik Workshop, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, 2800 Kgs. Lyngby, Denmark
| | - Lars Møller
- Kemiteknik Workshop, Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, 2800 Kgs. Lyngby, Denmark
| | - Krist V Gernaey
- Process and Systems Engineering Center (PROSYS), Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, 2800 Kgs. Lyngby, Denmark
| | - Ulrich Krühne
- Process and Systems Engineering Center (PROSYS), Department of Chemical and Biochemical Engineering, Technical University of Denmark, Building 229, 2800 Kgs. Lyngby, Denmark
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24
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Begum G, Lalwani S, Rana RK. Designing Microreactors Resembling Cellular Microenvironment via Polyamine-Mediated Nanoparticle-Assembly for Tuning Glucose Oxidase Kinetics. Bioconjug Chem 2018; 29:2586-2593. [DOI: 10.1021/acs.bioconjchem.8b00303] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gousia Begum
- Nanomaterials Laboratory, CSIR—Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Shikha Lalwani
- Nanomaterials Laboratory, CSIR—Indian Institute of Chemical Technology, Hyderabad 500 007, India
| | - Rohit Kumar Rana
- Nanomaterials Laboratory, CSIR—Indian Institute of Chemical Technology, Hyderabad 500 007, India
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25
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Improvement of catalytic, thermodynamics and antifungal activity of constitutive Trichoderma longibrachiatum KT693225 exochitinase by covalent coupling to oxidized polysaccharides. Int J Biol Macromol 2018; 112:179-187. [DOI: 10.1016/j.ijbiomac.2018.01.156] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2017] [Revised: 01/20/2018] [Accepted: 01/23/2018] [Indexed: 11/19/2022]
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26
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Zhang J, Li M, Zhang Y. Enhancing the thermostability of recombinant cyclodextrin glucanotransferase via optimized stabilizer. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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27
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Tao Q, Li A, Zhang Z, Ma R, Shi L. Stabilization of Multimeric Enzymes against Heat Inactivation by Chitosan- graft-poly( N-isopropylacrylamide) in Confined Spaces. ACS Biomater Sci Eng 2017; 3:3141-3145. [PMID: 33445357 DOI: 10.1021/acsbiomaterials.7b00764] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The inactivation of multimeric enzymes is a more complicated process compared with that of monomeric enzymes. Stabilization of multimeric enzymes is regarded as a challenge with practical values in enzyme technology. Temperature-sensitive copolymer chitosan-graft- poly(N-isopropylacrylamide) was synthesized and encapsulated with multimeric enzymes in the confined spaces constructed by the W/O microemulsion. In this way, the quaternary structures of multimeric enzymes are stabilized and the thermal stabilities of them are enhanced. The whole process was studied and discussed. This method, which works well for both glucose oxidase and catalase, can be developed as a general protection strategy for multimeric enzymes.
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Affiliation(s)
- Qian Tao
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
| | | | | | | | - Linqi Shi
- School of Chemistry and Materials Science, Ludong University, Yantai 264025, China
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28
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Benítez-Mateos AI, San Sebastian E, Ríos-Lombardía N, Morís F, González-Sabín J, López-Gallego F. Asymmetric Reduction of Prochiral Ketones by Using Self-Sufficient Heterogeneous Biocatalysts Based on NADPH-Dependent Ketoreductases. Chemistry 2017; 23:16843-16852. [PMID: 28940802 DOI: 10.1002/chem.201703475] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Indexed: 12/13/2022]
Abstract
The development of cell-free and self-sufficient biocatalytic systems represents an emerging approach to address more complex synthetic schemes under nonphysiological conditions. Herein, we report the development of a self-sufficient heterogeneous biocatalyst for the synthesis of chiral alcohols without the need to add an exogenous cofactor. In this work, an NADPH-dependent ketoreductase was primarily stabilized and further co-immobilized with NADPH to catalyze asymmetric reductions without the addition of an exogenous cofactor. As a result, the immobilized cofactor is accessible, and thus, it is recycled inside the porous structure without diffusing out into the bulk, as demonstrated by single-particle in operando studies. This self-sufficient heterogeneous biocatalyst was used and recycled for the asymmetric reduction of eleven carbonyl compounds in a batch reactor without the addition of exogenous NADPH to achieve the corresponding alcohols in 100 % yield and >99 % ee; this high performance was maintained over five consecutive reaction cycles. Likewise, the self-sufficient heterogeneous biocatalyst was integrated into a plug flow reactor for the continuous synthesis of one model secondary alcohol, which gave rise to a space-time yield of 97-112 g L-1 day-1 ; additionally, the immobilized cofactor accumulated a total turnover number of 1076 for 120 h. This is one of the few examples of the successful implementation of continuous reactions in aqueous media catalyzed by cell-free and immobilized systems that integrate both enzymes and cofactors into the solid phase.
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Affiliation(s)
- Ana I Benítez-Mateos
- Heterogeneous biocatalysis group, CIC biomaGUNE, Edificio Empresarial "C", Paseo de Miramón 182, 20009, Donostia, Spain
| | - Eneko San Sebastian
- Molecular Imaging Unit, CIC biomaGUNE, Paseo Miramon 182, San Sebastian, Spain
| | | | - Francisco Morís
- EntreChem SL, Edificio Científico Tecnológico, Campus El Cristo, 33006, Oviedo, Spain
| | - Javier González-Sabín
- EntreChem SL, Edificio Científico Tecnológico, Campus El Cristo, 33006, Oviedo, Spain
| | - Fernando López-Gallego
- Heterogeneous biocatalysis group, CIC biomaGUNE, Edificio Empresarial "C", Paseo de Miramón 182, 20009, Donostia, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
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29
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Zubkovs V, Schuergers N, Lambert B, Ahunbay E, Boghossian AA. Mediatorless, Reversible Optical Nanosensor Enabled through Enzymatic Pocket Doping. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2017; 13:1701654. [PMID: 28940888 DOI: 10.1002/smll.201701654] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 08/05/2017] [Indexed: 05/27/2023]
Abstract
Single-walled carbon nanotubes (SWCNTs) exhibit intrinsic near-infrared fluorescence that benefits from indefinite photostability and tissue transparency, offering a promising basis for in vivo biosensing. Existing SWCNT optical sensors that rely on charge transfer for signal transduction often require exogenous mediators that compromise the stability and biocompatibility of the sensors. This study presents a reversible, mediatorless, near-infrared glucose sensor based on glucose oxidase-wrapped SWCNTs (GOx-SWCNTs). GOx-SWCNTs undergo a selective fluorescence increase in the presence of aldohexoses, with the strongest response toward glucose. When incorporated into a custom-built membrane device, the sensor demonstrates a monotonic increase in initial response rates with increasing glucose concentrations between 3 × 10-3 and 30 × 10-3 m and an apparent Michaelis-Menten constant of KM (app) ≈ 13.9 × 10-3 m. A combination of fluorescence, absorption, and Raman spectroscopy measurements suggests a fluorescence enhancement mechanism based on localized enzymatic doping of SWCNT defect sites that does not rely on added mediators. Removal of glucose reverses the doping effects, resulting in full recovery of the fluorescence intensity. The cyclic addition and removal of glucose is shown to successively enhance and recover fluorescence, demonstrating reversibility that serves as a prerequisite for continuous glucose monitoring.
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Affiliation(s)
- Vitalijs Zubkovs
- École Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
| | - Nils Schuergers
- École Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
| | - Benjamin Lambert
- École Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
| | - Esra Ahunbay
- École Polytechnique Fédérale de Lausanne, Lausanne, CH-1015, Switzerland
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30
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Vardar G, Altikatoglu M, Basaran Y, Işıldak İ. Synthesis of glucose oxidase-PEG aldehyde conjugates and improvement of enzymatic stability. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2017; 46:788-794. [PMID: 28679282 DOI: 10.1080/21691401.2017.1345920] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
In this article, aldehyde derivative of poly(ethylene glycol) (PEG) was synthesized directly with sodium periodate agent. To obtain a conjugate which possesses better stability, PEG aldehyde was bonded to native enzyme with different molar ratios. The conjugation reaction turned out to be efficient and mild. Colorimetric method was applied to evaluate the enzymatic activity of native GOD and its derivatives by introducing another enzyme, horseradish peroxidase. The GOD-PEG aldehyde conjugate with polymeric chains exhibited reduced enzymatic activity towards the catalytical oxidation of glucose, but with significantly increased thermal stability and elongated lifetime. When GOD was modified with PEG aldehyde the enzymatic activity was decreased 40% at 30 °C. However, when incubated at 60 °C the GOD-PEG aldehyde conjugate still retained the enzyme bioactivity of 40% bioactivity left after 4 h, whereas the native GOD lost almost all the activity in 4 h. The polymer chain attached, the more reduction of the enzymatic activity resulted, however, the longer the lifetime and higher thermal stability of the enzyme obtained.
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Affiliation(s)
- Gökay Vardar
- a Department of Chemistry, Faculty of Arts and Sciences , Yildiz Technical University , Istanbul , Turkey
| | - Melda Altikatoglu
- a Department of Chemistry, Faculty of Arts and Sciences , Yildiz Technical University , Istanbul , Turkey
| | - Yeliz Basaran
- b Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering , Yildiz Technical University , Istanbul , Turkey
| | - İbrahim Işıldak
- b Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering , Yildiz Technical University , Istanbul , Turkey
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31
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Zore OV, Kasi RM, Kumar CV. Armored Enzyme-Nanohybrids and Their Catalytic Function Under Challenging Conditions. Methods Enzymol 2017; 590:169-192. [PMID: 28411637 DOI: 10.1016/bs.mie.2017.02.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Synthesis and characterization of highly stable and functional bienzyme-polymer triads assembled on layered graphene oxide (GO) are described here. Glucose oxidase (GOx) and horseradish peroxidase (HRP) were used as model enzymes and polyacrylic acid (PAA) as model polymer to armor the enzymes. PAA-armored GOx and HRP covalent conjugates were further protected from denaturation by adsorption onto GO nanosheets. Structure and morphology of this enzyme-polymer-nanosheet hybrid biocatalyst (GOx-HRP-PAA/GO) were confirmed by agarose gel electrophoresis, zeta potential, circular dichroism, and transmission electron microscopy. The armored biocatalysts retained full enzymatic activities under challenging conditions of pH (2.5-7.4), warm temperatures (65°C), and presence of chemical denaturants, 4mM sodium dodecyl sulfate, while GOx/HRP physical mixtures without the armor had very little activity under the same conditions. Therefore, this novel combination of two orthogonal approaches, enzyme conjugation with PAA and subsequent physical adsorption onto GO nanosheets, resulted in super stable hybrid biocatalysts that function under harsh conditions. Therefore, this general and powerful approach may be used to design environmentally friendly, green, biocompatible, and biodegradable biocatalysts for energy production in biofuel cell or biobattery applications.
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Affiliation(s)
- Omkar V Zore
- University of Connecticut, Storrs, CT, United States; Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT, United States
| | - Rajeswari M Kasi
- University of Connecticut, Storrs, CT, United States; Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT, United States.
| | - Challa V Kumar
- University of Connecticut, Storrs, CT, United States; Polymer Program, Institute of Materials Science, University of Connecticut, Storrs, CT, United States
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32
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Investigation of deactivation thermodynamics of lipase immobilized on polymeric carrier. Bioprocess Biosyst Eng 2017; 40:741-757. [DOI: 10.1007/s00449-017-1740-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2016] [Accepted: 01/18/2017] [Indexed: 10/20/2022]
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Abstract
Over the last few decades the development of new technologies, the fabrication of new materials, and the introduction of nanotechnologies created new trends in a series of advances that produced innovations in biological sensing devices with a wide range of application from health, security, defense, food, and medicine, to the environment. Specificity, low cost, rapidity, sensitivity, and multiplicity are some of the reasons for their growth, and their commercial success is expected to increase in the next future. Biosensors are devices in which the recognition part of the target molecule is accomplished by biological macromolecules such as proteins, enzymes, antibodies, aptamers, etc. These biomolecules are able to bind to the target molecules with high selectivity and specificity. The interaction between the target molecule and the specific biomolecule is reflected as a change of the biomolecule structural features. The extent of this change is strictly related to the biosensor response. Fluorescence spectroscopy, due to its sensitivity, is often used as the principal technique to monitor biological interactions, and thus the biosensor response as well. Both the intrinsic ultraviolet fluorescence of protein, arising from aromatic amino acids (tryptophan, tyrosine, and phenylalanine), and extrinsic fluorescent labels emitting in the visible region of the spectrum together allow for very flexible transduction of the analyte recognition, suitable for many different applications. This chapter focuses special attention on enzymes as practically unmatched recognition elements for biosensors and emphasizes the potential advantages of customized biosensor devices using apo- or holo forms of enzymes also isolated from thermophile sources.
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Jampala P, Preethi M, Ramanujam S, Harish B, Uppuluri KB, Anbazhagan V. Immobilization of levan-xylanase nanohybrid on an alginate bead improves xylanase stability at wide pH and temperature. Int J Biol Macromol 2017; 95:843-849. [DOI: 10.1016/j.ijbiomac.2016.12.012] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 11/03/2016] [Accepted: 12/05/2016] [Indexed: 10/20/2022]
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Effect of arginine on oligomerization and stability of N-acetylglutamate synthase. Sci Rep 2016; 6:38711. [PMID: 27934952 PMCID: PMC5146650 DOI: 10.1038/srep38711] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 11/15/2016] [Indexed: 11/08/2022] Open
Abstract
N-acetylglutamate synthase (NAGS; E.C.2.3.1.1) catalyzes the formation of N-acetylglutamate (NAG) from acetyl coenzyme A and glutamate. In microorganisms and plants, NAG is the first intermediate of the L-arginine biosynthesis; in animals, NAG is an allosteric activator of carbamylphosphate synthetase I and III. In some bacteria bifunctional N-acetylglutamate synthase-kinase (NAGS-K) catalyzes the first two steps of L-arginine biosynthesis. L-arginine inhibits NAGS in bacteria, fungi, and plants and activates NAGS in mammals. L-arginine increased thermal stability of the NAGS-K from Maricaulis maris (MmNAGS-K) while it destabilized the NAGS-K from Xanthomonas campestris (XcNAGS-K). Analytical gel chromatography and ultracentrifugation indicated tetrameric structure of the MmMNAGS-K in the presence and absence of L-arginine and a tetramer-octamer equilibrium that shifted towards tetramers upon binding of L-arginine for the XcNAGS-K. Analytical gel chromatography of mouse NAGS (mNAGS) indicated either different oligomerization states that are in moderate to slow exchange with each other or deviation from the spherical shape of the mNAGS protein. The partition coefficient of the mNAGS increased in the presence of L-arginine suggesting smaller hydrodynamic radius due to change in either conformation or oligomerization. Different effects of L-arginine on oligomerization of NAGS may have implications for efforts to determine the three-dimensional structure of mammalian NAGS.
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Inactivation thermodynamics and iso-kinetic profiling for evaluating operational suitability of milk clotting enzyme immobilized in composite polymer matrix. Int J Biol Macromol 2016; 91:317-28. [DOI: 10.1016/j.ijbiomac.2016.05.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 05/07/2016] [Accepted: 05/07/2016] [Indexed: 11/23/2022]
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Halalipour A, Duff MR, Howell EE, Reyes-De-Corcuera JI. Glucose oxidase stabilization against thermal inactivation using high hydrostatic pressure and hydrophobic modification. Biotechnol Bioeng 2016; 114:516-525. [DOI: 10.1002/bit.26185] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 08/14/2016] [Accepted: 09/13/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Ali Halalipour
- Department of Food Science and Technology; University of Georgia; Food Science Building, 100 Cedar St. Athens, Georgia 30602
| | - Michael R. Duff
- Department of Biochemistry, Cellular and Molecular Biology; University of Tennessee; Knoxville Tennessee
| | - Elizabeth E. Howell
- Department of Biochemistry, Cellular and Molecular Biology; University of Tennessee; Knoxville Tennessee
| | - José I. Reyes-De-Corcuera
- Department of Food Science and Technology; University of Georgia; Food Science Building, 100 Cedar St. Athens, Georgia 30602
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Shirke AN, Su A, Jones JA, Butterfoss GL, Koffas MA, Kim JR, Gross RA. Comparative thermal inactivation analysis ofAspergillus oryzaeandThiellavia terrestriscutinase: Role of glycosylation. Biotechnol Bioeng 2016; 114:63-73. [DOI: 10.1002/bit.26052] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2016] [Revised: 07/01/2016] [Accepted: 07/11/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Abhijit N. Shirke
- Department of Chemistry and Chemical Biology; Rensselaer Polytechnic Institute; Troy New York
- Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; Troy New York
| | - An Su
- Department of Chemistry and Chemical Biology; Rensselaer Polytechnic Institute; Troy New York
- Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; Troy New York
| | - J. Andrew Jones
- Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; Troy New York
- Department of Chemical and Biological Engineering; Rensselaer Polytechnic Institute; Troy New York
| | - Glenn L. Butterfoss
- Center for Genomics and Systems Biology; New York University Abu Dhabi; Abu Dhabi UAE
| | - Mattheos A.G. Koffas
- Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; Troy New York
- Department of Chemical and Biological Engineering; Rensselaer Polytechnic Institute; Troy New York
| | - Jin Ryoun Kim
- Department of Chemical and Biomolecular Engineering; New York University Tandon School of Engineering; Brooklyn New York
| | - Richard A. Gross
- Department of Chemistry and Chemical Biology; Rensselaer Polytechnic Institute; Troy New York
- Center for Biotechnology and Interdisciplinary Studies; Rensselaer Polytechnic Institute; Troy New York
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39
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Pratumvinit B, Charoenkoop N, Niwattisaiwong S, Kost GJ, Tientadakul P. The Effects of Temperature and Relative Humidity on Point-of-Care Glucose Measurements in Hospital Practice in a Tropical Clinical Setting. J Diabetes Sci Technol 2016; 10:1094-100. [PMID: 26908568 PMCID: PMC5032940 DOI: 10.1177/1932296816633485] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Hospitals in tropical countries experience conditions that exceed manufacturer temperature and humidity limits for point-of-care (POC) glucose reagents. Our goal was to assess the effects of out-of-limits storage temperature, operating temperature, and operating humidity on POC glucose measurement reliability. METHODS Quality control measurements were performed monthly using glucose test strips stored under controlled conditions and in inpatient wards under ambient conditions. Glucose test strips were evaluated in groups organized by operating temperatures of 24-25 (group 1), 28-29 (group 2), and 33-34°C (group 3), and relative humidity (RH) of ≤70 (group A), ~80 (group B), and ~90% (group C). RESULTS Glucose results for different storage conditions were inconsistent. Measurements at higher operating temperatures had lower values with mean differences of -2.4 (P < .001) and -36.5 (P < .001) mg/dL (28-29 vs 24-25°C), and -3.6 (P < .001) and -37.4 (P < .001) mg/dL (33-34 vs 24-25°C) for low and high control levels, respectively. Measurements at higher RH had lower values with mean differences of -4.0 (P < .001) and -13.2 (P < .001) mg/dL (~80 vs ≤70% RH), and -5.8 (P < .001) and -16.6 (P < .001) mg/dL (~90 vs ≤70% RH) for low and high levels, respectively. CONCLUSIONS High temperature and high RH decreased glucose concentrations for the POC oxidase-based system we evaluated. We recommend that individual hospitals perform stress testing, then determine if maximum absolute differences, which represent highest risk for patients, are clinically significant for decision making by using error grid analysis.
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Affiliation(s)
- Busadee Pratumvinit
- Department of Clinical Pathology, Faculty of Medicine Siriraj hospital, Mahidol University, Bangkok, Thailand
| | - Nattakom Charoenkoop
- Department of Clinical Pathology, Faculty of Medicine Siriraj hospital, Mahidol University, Bangkok, Thailand
| | - Soamsiri Niwattisaiwong
- Department of Clinical Pathology, Faculty of Medicine Siriraj hospital, Mahidol University, Bangkok, Thailand
| | - Gerald J Kost
- Point-of-Care Testing Center for Teaching and Research, School of Medicine, University of California and Knowledge Optimization®, Davis, CA, USA
| | - Panutsaya Tientadakul
- Department of Clinical Pathology, Faculty of Medicine Siriraj hospital, Mahidol University, Bangkok, Thailand
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40
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Ritter DW, Newton JM, Roberts JR, McShane MJ. Albuminated Glycoenzymes: Enzyme Stabilization through Orthogonal Attachment of a Single-Layered Protein Shell around a Central Glycoenzyme Core. Bioconjug Chem 2016; 27:1285-92. [PMID: 27111632 DOI: 10.1021/acs.bioconjchem.6b00103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Here we demonstrate an approach to stabilize enzymes through the orthogonal covalent attachment of albumin on the single-enzyme level. Albuminated glycoenzymes (AGs) based upon glucose oxidase and catalase from Aspergillus niger were prepared in this manner. Gel filtration chromatography and dynamic light scattering support modification, with an increase in hydrodynamic radius of ca. 60% upon albumination. Both AGs demonstrate a marked resistance to aggregation during heating to 90 °C, but this effect is more profound in albuminated catalase. The functional characteristics of albuminated glucose oxidase vary considerably with exposure type. The AG's thermal inactivation is reduced more than 25 times compared to native glucose oxidase, and moderate stabilization is observed with one month storage at 37 °C. However, albumination has no effect on operational stability of glucose oxidase.
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Affiliation(s)
- Dustin W Ritter
- Department of Biomedical Engineering, Texas A&M University , College Station, Texas 77843-3120, United States
| | - Jared M Newton
- Department of Biomedical Engineering, Texas A&M University , College Station, Texas 77843-3120, United States
| | - Jason R Roberts
- Department of Biomedical Engineering, Texas A&M University , College Station, Texas 77843-3120, United States
| | - Michael J McShane
- Department of Biomedical Engineering, Texas A&M University , College Station, Texas 77843-3120, United States.,Department of Materials Science & Engineering, Texas A&M University , College Station, Texas 77843-3003, United States
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Suzuki A, Tsujimura S. Long-term Continuous Operation of FAD-dependent Glucose Dehydrogenase Hydrogel-modified Electrode at 37 °C. CHEM LETT 2016. [DOI: 10.1246/cl.160053] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Aimi Suzuki
- Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba
| | - Seiya Tsujimura
- Division of Materials Science, Faculty of Pure and Applied Sciences, University of Tsukuba
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42
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Dumitraşcu L, Stănciuc N, Bahrim GE, Ciumac A, Aprodu I. pH and heat-dependent behaviour of glucose oxidase down to single molecule level by combined fluorescence spectroscopy and molecular modelling. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2016; 96:1906-1914. [PMID: 26058827 DOI: 10.1002/jsfa.7296] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Revised: 04/06/2015] [Accepted: 06/01/2015] [Indexed: 06/04/2023]
Abstract
BACKGROUND In the food industry, glucose oxidase (GOX) is used to improve the shelf life of food materials. The pH- and heat-induced conformational changes of glucose oxidase from Aspergillus niger were quantified by means of fluorescence spectroscopy and molecular dynamics simulations. RESULTS The phase diagram showed an all-or-none transition process, indicating that pH and temperature largely influence the conformational state of GOX. Shifts in maximum wavelength of Trp, Tyr were registered as the protein encounters a lower pH (pH 4.0), suggesting significant changes of the polarity around the chromophore molecule. Quenching experiments using KI showed higher quenching constants of Trp and flavin adenine dinucleotide upon heating or by changing pH value, and were mainly correlated with the conformational changes upon protein matrix. Finally, valuable insights into the thermal behaviour of GOX were obtained from molecular modelling results. CONCLUSIONS The conformation and structure of GOX protein is dependent upon the pH and heat treatment applied. Molecular dynamics simulation indicated significant changes in the substrate binding region at temperatures over 60 °C that might affect enzyme activity. Moreover, an important alteration of the small pocket hosting the positively charged His(516) residue responsible for oxygen activation appears evident at high temperatures.
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Affiliation(s)
- Loredana Dumitraşcu
- Dunarea de Jos University of Galati, Faculty of Food Science and Engineering, Domneascã Street 111, 800201, Galati, Romania
| | - Nicoleta Stănciuc
- Dunarea de Jos University of Galati, Faculty of Food Science and Engineering, Domneascã Street 111, 800201, Galati, Romania
| | - Gabriela Elena Bahrim
- Dunarea de Jos University of Galati, Faculty of Food Science and Engineering, Domneascã Street 111, 800201, Galati, Romania
| | - Alexandrina Ciumac
- Dunarea de Jos University of Galati, Faculty of Food Science and Engineering, Domneascã Street 111, 800201, Galati, Romania
| | - Iuliana Aprodu
- Dunarea de Jos University of Galati, Faculty of Food Science and Engineering, Domneascã Street 111, 800201, Galati, Romania
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43
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Srivastava PK, Appu Rao G. AR, Kapoor M. Metal-dependent thermal stability of recombinant endo-mannanase (ManB-1601) belonging to family GH 26 from Bacillus sp. CFR1601. Enzyme Microb Technol 2016; 84:41-9. [DOI: 10.1016/j.enzmictec.2015.12.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 11/25/2015] [Accepted: 12/17/2015] [Indexed: 10/22/2022]
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Kannan P, Maiyalagan T, Marsili E, Ghosh S, Niedziolka-Jönsson J, Jönsson-Niedziolka M. Hierarchical 3-dimensional nickel-iron nanosheet arrays on carbon fiber paper as a novel electrode for non-enzymatic glucose sensing. NANOSCALE 2016; 8:843-55. [PMID: 26578259 DOI: 10.1039/c5nr06802a] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Three-dimensional nickel-iron (3-D/Ni-Fe) nanostructures are exciting candidates for various applications because they produce more reaction-active sites than 1-D and 2-D nanostructured materials and exhibit attractive optical, electrical and catalytic properties. In this work, freestanding 3-D/Ni-Fe interconnected hierarchical nanosheets, hierarchical nanospheres, and porous nanospheres are directly grown on a flexible carbon fiber paper (CFP) substrate by a single-step hydrothermal process. Among the nanostructures, 3-D/Ni-Fe interconnected hierarchical nanosheets show excellent electrochemical properties because of its high conductivity, large specific active surface area, and mesopores on its walls (vide infra). The 3-D/Ni-Fe hierarchical nanosheet array modified CFP substrate is further explored as a novel electrode for electrochemical non-enzymatic glucose sensor application. The 3-D/Ni-Fe hierarchical nanosheet arrays exhibit significant catalytic activity towards the electrochemical oxidation of glucose, as compared to the 3-D/Ni-Fe hierarchical nanospheres, and porous nanospheres. The 3-D/Ni-Fe hierarchical nanosheet arrays can access a large amount of glucose molecules on their surface (mesopore walls) for an efficient electrocatalytic oxidation process. Moreover, 3-D/Ni-Fe hierarchical nanosheet arrays showed higher sensitivity (7.90 μA μM(-1) cm(-2)) with wide linear glucose concentration ranging from 0.05 μM to 0.2 mM, and the low detection limit (LOD) of 0.031 μM (S/N = 3) is achieved by the amperometry method. Further, the 3-D/Ni-Fe hierarchical nanosheet array modified CFP electrode can be demonstrated to have excellent selectivity towards the detection of glucose in the presence of 500-fold excess of major important interferents. All these results indicate that 3-D/Ni-Fe hierarchical nanosheet arrays are promising candidates for non-enzymatic glucose sensing.
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Affiliation(s)
- Palanisamy Kannan
- Institute of Physical Chemistry, Polish Academy of Sciences, 44/52 ul. Kasprzaka, 01-224 Warsaw, Poland. and Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, 60 Nanyang Drive, SBS-01N-27, Singapore.
| | | | - Enrico Marsili
- Singapore Centre on Environmental Life Sciences Engineering (SCELSE), Nanyang Technological University, 60 Nanyang Drive, SBS-01N-27, Singapore.
| | - Srabanti Ghosh
- Department of Chemical, Biological and Macromolecular Sciences, S. N. Bose National Centre for Basic Sciences, Block-JD, Sector-III, Salt Lake, Kolkata-700098, India
| | - Joanna Niedziolka-Jönsson
- Institute of Physical Chemistry, Polish Academy of Sciences, 44/52 ul. Kasprzaka, 01-224 Warsaw, Poland.
| | - Martin Jönsson-Niedziolka
- Institute of Physical Chemistry, Polish Academy of Sciences, 44/52 ul. Kasprzaka, 01-224 Warsaw, Poland.
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45
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Lu R, Li WW, Katzir A, Raichlin Y, Mizaikoff B, Yu HQ. Fourier transform infrared spectroscopy on external perturbations inducing secondary structure changes of hemoglobin. Analyst 2016; 141:6061-6067. [DOI: 10.1039/c6an01477a] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The secondary structure of proteins and their conformation are intimately related to their biological functions.
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Affiliation(s)
- Rui Lu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse
- School of Environmental and Biological Engineering
- Nanjing University of Science and Technology
- Nanjing
- China
| | - Wen-Wei Li
- CAS Key Laboratory of Urban Pollutant Conversion
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- P.R. China
| | - Abraham Katzir
- School of Physics
- Tel-Aviv University
- Tel-Aviv 69978
- Israel
| | - Yosef Raichlin
- Department of Applied Physics
- Ariel University Center of Samaria
- Ariel
- Israel
| | - Boris Mizaikoff
- Institute of Analytical and Bioanalytical Chemistry
- Ulm University
- 89081 Ulm
- Germany
| | - Han-Qing Yu
- CAS Key Laboratory of Urban Pollutant Conversion
- Department of Chemistry
- University of Science and Technology of China
- Hefei 230026
- P.R. China
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46
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Novak MJ, Pattammattel A, Koshmerl B, Puglia M, Williams C, Kumar CV. “Stable-on-the-Table” Enzymes: Engineering the Enzyme–Graphene Oxide Interface for Unprecedented Kinetic Stability of the Biocatalyst. ACS Catal 2015. [DOI: 10.1021/acscatal.5b01968] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marc J. Novak
- Department
of Chemistry,
Department of Molecular and Cell Biology, and Institute of Materials
Science, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Ajith Pattammattel
- Department
of Chemistry,
Department of Molecular and Cell Biology, and Institute of Materials
Science, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Brianna Koshmerl
- Department
of Chemistry,
Department of Molecular and Cell Biology, and Institute of Materials
Science, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Megan Puglia
- Department
of Chemistry,
Department of Molecular and Cell Biology, and Institute of Materials
Science, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Christina Williams
- Department
of Chemistry,
Department of Molecular and Cell Biology, and Institute of Materials
Science, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Challa V. Kumar
- Department
of Chemistry,
Department of Molecular and Cell Biology, and Institute of Materials
Science, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
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47
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Sarika C, Rekha K, Narasimha Murthy B. Studies on enhancing operational stability of a reusable laccase-based biosensor probe for detection of ortho-substituted phenolic derivatives. 3 Biotech 2015; 5:911-924. [PMID: 28324391 PMCID: PMC4624137 DOI: 10.1007/s13205-015-0292-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2014] [Accepted: 02/22/2015] [Indexed: 11/24/2022] Open
Abstract
An amperometric principle-based biosensor containing immobilized enzyme laccase from Trametes versicolor was developed for detection of ortho-substituted phenolic derivatives. Different immobilization methods for Trametes versicolor laccase enzyme on cellophane membrane and the enhancement of operational stability of the immobilized enzyme electrode using various protein-based stabilizing agents were studied. Among tested methods of immobilization, co-cross-linking method with bovine serum albumin was superior to the other methods in terms of sensitivity, limit of detection, response time, and operating and thermal stability. Biosensor response reached steady state within 3 min and exhibited maximum activity at 45 °C and pH 6.8. The sensitivity of the ortho-substituted phenols for the test biosensor developed with co-cross-linking method of immobilization using bovine serum albumin as the protein-based stabilizing agent was in the order: 2-aminophenol > guaiacol(2-methoxyphenol) > catechol(2-hydroxyphenol) > cresol(2-methyl phenol) > 2-chlorophenol. Validation of the newly developed biosensor by comparison with HPLC showed good agreement in the results. A newly developed biosensor was applied for quantification of ortho-substituted phenols in simulated effluent samples.
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Affiliation(s)
- C Sarika
- Department of Biotechnology Engineering, CMR Institute of Technology, Bangalore, 560 037, India
| | - K Rekha
- Department of Biotechnology Engineering, CMR Institute of Technology, Bangalore, 560 037, India.
| | - B Narasimha Murthy
- Department of Chemistry, CMR Institute of Technology, Bangalore, 560 037, India
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48
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Spier MR, Behsnilian D, Zielinski A, Konietzny U, Greiner R. Studies Towards the Stabilisation of a Mushroom Phytase Produced by Submerged Cultivation. Protein J 2015; 34:367-79. [DOI: 10.1007/s10930-015-9631-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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49
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Zore OV, Pattammattel A, Gnanaguru S, Kumar CV, Kasi RM. Bienzyme–Polymer–Graphene Oxide Quaternary Hybrid Biocatalysts: Efficient Substrate Channeling under Chemically and Thermally Denaturing Conditions. ACS Catal 2015. [DOI: 10.1021/acscatal.5b00958] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Omkar V. Zore
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
- Institute of Materials Science, U-3136, University of Connecticut, Storrs, Connecticut 06269-3069, United States
| | - Ajith Pattammattel
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Shailaja Gnanaguru
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
| | - Challa V. Kumar
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
- Institute of Materials Science, U-3136, University of Connecticut, Storrs, Connecticut 06269-3069, United States
- Department
of Molecular and Cell Biology, University of Connecticut, Storrs, Connecticut 06269-3125, United States
| | - Rajeswari M. Kasi
- Department of Chemistry, University of Connecticut, Storrs, Connecticut 06269-3060, United States
- Institute of Materials Science, U-3136, University of Connecticut, Storrs, Connecticut 06269-3069, United States
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50
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Wang D, Cai D, Huang H, Liu B, Wang L, Liu Y, Li H, Wang Y, Li Q, Wang T. Non-enzymatic electrochemical glucose sensor based on NiMoO₄ nanorods. NANOTECHNOLOGY 2015; 26:145501. [PMID: 25772142 DOI: 10.1088/0957-4484/26/14/145501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A non-enzymatic glucose sensor based on the NiMoO4 nanorods has been fabricated for the first time. The electrocatalytic performance of the NiMoO4 nanorods' modified electrode toward glucose oxidation was evaluated by cyclic voltammetry and amperometry. The NiMoO4 nanorods' modified electrode showed a greatly enhanced electrocatalytic property toward glucose oxidation, as well as an excellent anti-interference and a good stability. Impressively, good accuracy and high precision for detecting glucose concentration in human serum samples were obtained. These excellent sensing properties, combined with good reproducibility and low cost, indicate that NiMoO4 nanorods are a promising candidate for non-enzymatic glucose sensors.
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Affiliation(s)
- Dandan Wang
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, People's Republic of China
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