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Yang DN, Geng S, Jing R, Zhang H. Recent Developments in Personal Glucose Meters as Point-of-Care Testing Devices (2020-2024). BIOSENSORS 2024; 14:419. [PMID: 39329794 PMCID: PMC11430212 DOI: 10.3390/bios14090419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2024] [Revised: 08/13/2024] [Accepted: 08/24/2024] [Indexed: 09/28/2024]
Abstract
Point-of-care testing (POCT) is a contemporary diagnostic approach characterized by its user-friendly nature, cost efficiency, environmental compatibility, and lack of reliance on professional experts. Therefore, it is widely used in clinical diagnosis and other analytical testing fields to meet the demand for rapid and convenient testing. The application of POCT technology not only improves testing efficiency, but also brings convenience and benefits to the healthcare industry. The personal glucose meter (PGM) is a highly successful commercial POCT tool that has been widely used not only for glucose analysis, but also for non-glucose target detection. In this review, the recent advances from 2020 to 2024 in non-glucose target analysis for PGMs as POCT devices are summarized. The signal transduction strategies for non-glucose target analysis based on PGMs, including enzymatic transduction, nanocarrier transduction (enzyme or glucose), and glucose consumption transduction are briefly introduced. Meanwhile, the applications of PGMs in non-glucose target analysis are outlined, encompassing biomedical, environmental, and food analysis, along with other diverse applications. Finally, the prospects of and obstacles to employing PGMs as POCT tools for non-glucose target analysis are discussed.
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Affiliation(s)
- Dan-Ni Yang
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
| | - Shan Geng
- The Central Laboratory, The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing 402360, China
| | - Rong Jing
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
| | - Hao Zhang
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
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2
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Shamim T, Asif HM, Abida Ejaz S, Hussain Z, Wani TA, Sumreen L, Abdullah M, Ahmed Z, Iqbal J, Kim SJ, Shah MK. Investigations of Limeum Indicum Plant for Diabetes Mellitus and Alzheimer's Disease Dual Therapy: Phytochemical, GC-MS Chemical Profiling, Enzyme Inhibition, Molecular Docking and In-Vivo Studies. Chem Biodivers 2024; 21:e202301858. [PMID: 38608202 DOI: 10.1002/cbdv.202301858] [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: 11/21/2023] [Revised: 04/11/2024] [Accepted: 04/12/2024] [Indexed: 04/14/2024]
Abstract
Limeum indicum has been widely utilized in traditional medicine but no experimental work has been done on this herb. The primary objective of this study was to conduct a phytochemical analysis and assess the multifunctional capabilities of aforementioned plant in dual therapy for Alzheimer's disease (AD) and Type 2 diabetes (T2D). The phytochemical screening of ethanol, methanol extract, and their derived fractions of Limeum indicum was conducted using GC-MS, HPLC, UV-analysis and FTIR. The antioxidant capacity was evaluated by DPPH method. The inhibitory potential of the extracts/fractions against α-, β-glucosidase acetylcholinesterase (AChE), butyrylcholinesterase (BChE) and monoaminine oxidases (MAO-A & B) was evaluated. Results revealed that acetonitrile fraction has highest inhibitory potential against α-glucosidase (IC50=68.47±0.05 μg/mL), methanol extract against β-glucosidase (IC50=91.12±0.07 μg/mL), ethyl acetate fraction against AChE (IC50=59.0±0.02 μg/mL), ethanol extract against BChE (28.41±0.01 μg/mL), n-hexane fraction against MAO-A (IC50=150.5±0.31 μg/mL) and methanol extract for MAO-B (IC50=75.95±0.13 μg/mL). The docking analysis of extracts\fractions suggested the best binding scores within the active pocket of the respective enzymes. During the in-vivo investigation, ethanol extract produced hypoglycemic effect (134.52±2.79 and 119.38±1.40 mg/dl) after 21 days treatment at dose level of 250 and 500 mg/Kg. Histopathological findings further supported the in-vivo studies.
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Affiliation(s)
- Tahira Shamim
- University College of Conventional Medicine, Faculty of Medicine & Allied Health Sciences, The Islamia University of Bahawalpur, 63100, Bahawalpur, Pakistan
| | - Hafiz Muhammad Asif
- University College of Conventional Medicine, Faculty of Medicine & Allied Health Sciences, The Islamia University of Bahawalpur, 63100, Bahawalpur, Pakistan
| | - Syeda Abida Ejaz
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, The Islamia University of Bahawalpur, 63100, Bahawalpur, Pakistan
| | - Zahid Hussain
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, 22060, Abbottabad, Pakistan
- Center for Advance Drug Research, COMSATS University Islamabad, Abbottabad Campus, 22060, Abbottabad, Pakistan
| | - Tanveer A Wani
- Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, P.O.Box 2452, 11451, Riyadh, Saudi Arabia
| | - Laila Sumreen
- University College of Conventional Medicine, Faculty of Medicine & Allied Health Sciences, The Islamia University of Bahawalpur, 63100, Bahawalpur, Pakistan
| | - Muhammad Abdullah
- Cholistan Institute of Desert Studies, The Islamia University of Bahawalpur, 63100, Bahawalpur, Pakistan
| | - Zubair Ahmed
- Department of Pharmacy, COMSATS University Islamabad, Abbottabad Campus, 22060, Abbottabad, Pakistan
| | - Jamshed Iqbal
- Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, 22060, Abbottabad, Pakistan
- Center for Advance Drug Research, COMSATS University Islamabad, Abbottabad Campus, 22060, Abbottabad, Pakistan
| | - Song Ja Kim
- College of Natural Sciences, Department of Biological Sciences, Kongju National University, 32588, Gongju, South Korea
| | - Muhammad Kamal Shah
- Faculty of Veterinary and Animal Sciences, Gomal University, 29220, Dera Ismail Khan, Pakistan
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3
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Yang DN, Wu SY, Deng HY, Zhang H, Shi S, Geng S. Blood Coagulation-Inspired Fibrin Hydrogel for Portable Detection of Thrombin Based on Personal Glucometer. BIOSENSORS 2024; 14:250. [PMID: 38785724 PMCID: PMC11118845 DOI: 10.3390/bios14050250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Revised: 05/09/2024] [Accepted: 05/14/2024] [Indexed: 05/25/2024]
Abstract
As one of the biomarkers of coagulation system-related diseases, the detection of thrombin is of practical importance. Thus, this study developed a portable biosensor based on a personal glucometer for rapid detection of thrombin activity. Fibrinogen was used for the detection of thrombin, and the assay principle was inspired by the blood coagulation process, where thrombin hydrolyzes fibrinogen to produce a fibrin hydrogel, and the amount of invertase encapsulated in the fibrin hydrogel fluctuates in accordance with the activity of thrombin in the sample solution. The quantitative assay is conducted by measuring the amount of unencapsulated invertase available to hydrolyze the substrate sucrose, and the signal readout is recorded using a personal glucometer. A linear detection range of 0-0.8 U/mL of thrombin with a limit of detection of 0.04 U/mL was obtained based on the personal glucometer sensing platform. The results of the selectivity and interference experiments showed that the developed personal glucometer sensing platform is highly selective and accurate for thrombin activity. Finally, the reliability of the portable glucometer method for rapid thrombin detection in serum samples was investigated by measuring the recovery rate, which ranged from 92.8% to 107.7%. In summary, the fibrin hydrogel sensing platform proposed in this study offers a portable and versatile means for detecting thrombin using a personal glucometer. This approach not only simplifies the detection process, but also eliminates the need for large instruments and skilled operators, and substantially reduces detection costs.
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Affiliation(s)
- Dan-Ni Yang
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China; (D.-N.Y.); (H.-Y.D.)
| | - Shu-Yi Wu
- Basic Medical College, Chongqing College of Traditional Chinese Medicine, Chongqing 402360, China;
| | - Han-Yu Deng
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China; (D.-N.Y.); (H.-Y.D.)
| | - Hao Zhang
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China; (D.-N.Y.); (H.-Y.D.)
| | - Shan Shi
- The Central Laboratory, The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing 402360, China;
| | - Shan Geng
- The Central Laboratory, The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing 402360, China;
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4
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Hunt NJ, Lockwood GP, Heffernan SJ, Daymond J, Ngu M, Narayanan RK, Westwood LJ, Mohanty B, Esser L, Williams CC, Kuncic Z, McCourt PAG, Le Couteur DG, Cogger VC. Oral nanotherapeutic formulation of insulin with reduced episodes of hypoglycaemia. NATURE NANOTECHNOLOGY 2024; 19:534-544. [PMID: 38168926 PMCID: PMC11026164 DOI: 10.1038/s41565-023-01565-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 11/02/2023] [Indexed: 01/05/2024]
Abstract
Injectable insulin is an extensively used medication with potential life-threatening hypoglycaemic events. Here we report on insulin-conjugated silver sulfide quantum dots coated with a chitosan/glucose polymer to produce a responsive oral insulin nanoformulation. This formulation is pH responsive, is insoluble in acidic environments and shows increased absorption in human duodenum explants and Caenorhabditis elegans at neutral pH. The formulation is sensitive to glucosidase enzymes to trigger insulin release. It is found that the formulation distributes to the liver in mice and rats after oral administration and promotes a dose-dependent reduction in blood glucose without promoting hypoglycaemia or weight gain in diabetic rodents. Non-diabetic baboons also show a dose-dependent reduction in blood glucose. No biochemical or haematological toxicity or adverse events were observed in mice, rats and non-human primates. The formulation demonstrates the potential to orally control blood glucose without hypoglycaemic episodes.
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Affiliation(s)
- Nicholas J Hunt
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia.
- Sydney Nano Institute, The University of Sydney, Camperdown, New South Wales, Australia.
- Charles Perkins Centre, The University of Sydney, Camperdown, New South Wales, Australia.
- ANZAC Research Institute, Concord Repatriation General Hospital, Sydney Local Health District (SLHD), Concord, New South Wales, Australia.
| | - Glen P Lockwood
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
- ANZAC Research Institute, Concord Repatriation General Hospital, Sydney Local Health District (SLHD), Concord, New South Wales, Australia
| | - Scott J Heffernan
- Royal Prince Alfred Hospital, SLHD, Camperdown, New South Wales, Australia
| | - Jarryd Daymond
- Sydney Nano Institute, The University of Sydney, Camperdown, New South Wales, Australia
- Sydney Business School, The University of Sydney, Camperdown, New South Wales, Australia
| | - Meng Ngu
- ANZAC Research Institute, Concord Repatriation General Hospital, Sydney Local Health District (SLHD), Concord, New South Wales, Australia
- Department of Gastroenterology, Concord Repatriation General Hospital, SLHD, Concord, New South Wales, Australia
| | - Ramesh K Narayanan
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
- ANZAC Research Institute, Concord Repatriation General Hospital, Sydney Local Health District (SLHD), Concord, New South Wales, Australia
| | - Lara J Westwood
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
- Sydney Nano Institute, The University of Sydney, Camperdown, New South Wales, Australia
- ANZAC Research Institute, Concord Repatriation General Hospital, Sydney Local Health District (SLHD), Concord, New South Wales, Australia
| | - Biswaranjan Mohanty
- Sydney Analytical Core Research Facility, The University of Sydney, Camperdown, New South Wales, Australia
| | - Lars Esser
- CSIRO Manufacturing, Clayton, Victoria, Australia
| | | | - Zdenka Kuncic
- Sydney Nano Institute, The University of Sydney, Camperdown, New South Wales, Australia
- School of Physics, The University of Sydney, Camperdown, New South Wales, Australia
| | - Peter A G McCourt
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
- ANZAC Research Institute, Concord Repatriation General Hospital, Sydney Local Health District (SLHD), Concord, New South Wales, Australia
- Department of Medical Biology, University of Tromsø-The Arctic University of Norway, Tromsø, Norway
| | - David G Le Couteur
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia
- Charles Perkins Centre, The University of Sydney, Camperdown, New South Wales, Australia
- ANZAC Research Institute, Concord Repatriation General Hospital, Sydney Local Health District (SLHD), Concord, New South Wales, Australia
| | - Victoria C Cogger
- Faculty of Medicine and Health, The University of Sydney, Camperdown, New South Wales, Australia.
- ANZAC Research Institute, Concord Repatriation General Hospital, Sydney Local Health District (SLHD), Concord, New South Wales, Australia.
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Lu D, Ge M, Qian F, Lv J, Du J. Single-holed cobalt - nitrogen - carbon hollow structure with oxidase-mimicking activity for the chemiluminescence determination of β - galactosidase activity. Mikrochim Acta 2024; 191:200. [PMID: 38488888 DOI: 10.1007/s00604-024-06285-5] [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: 11/12/2023] [Accepted: 02/23/2024] [Indexed: 03/17/2024]
Abstract
A single-holed cobalt - nitrogen - carbon (Co - N - C) hollow structure nanozyme has been fabricated by in situ growth of zeolitic imidazolate framework (ZIF - 67) on the polystyrene (PS) sphere and following treatment by high-temperature carbonization. The Co - N - C nanostructure mimics the activity of oxidase and can activate O2 into reactive oxygen species (ROS), giving a remarkable enhancement on the chemiluminescence (CL) signal of luminol - O2 reaction. The Co - N - C oxidase mimic has further been exploited in the biosensing field by the determination of the activity of β - galactosidase (β - gal). The CL method for β - gal activity has a linear range of 0.5 mU·L-1 to 5.0 U·L-1, a detection limit of 0.167 mU·L-1, and the precision of 3.1% (5.0 U·L-1, n = 11). This method has been employed to assess inhibitor screening of β - gal and determine activity of β - gal in spiked human serum samples.
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Affiliation(s)
- Duo Lu
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Mantang Ge
- Shaanxi Engineering Laboratory for Advanced Energy Technology, School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China
| | - Fangying Qian
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Jiagen Lv
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China
| | - Jianxiu Du
- Key Laboratory of Analytical Chemistry for Life Science of Shaanxi Province, School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi'an 710119, China.
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Chepeleva LV, Demidov OO, Snizhko AD, Tarasenko DO, Chumak AY, Kolomoitsev OO, Kotliar VM, Gladkov ES, Kyrychenko A, Roshal AD. Binding interactions of hydrophobically-modified flavonols with β-glucosidase: fluorescence spectroscopy and molecular modelling study. RSC Adv 2023; 13:34107-34121. [PMID: 38020002 PMCID: PMC10661682 DOI: 10.1039/d3ra06276g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 11/13/2023] [Indexed: 12/01/2023] Open
Abstract
Natural flavonoids are capable of inhibiting glucosidase activity, so they can be used for treating diabetes mellitus and hypertension. However, molecular-level details of their interactions with glucosidase enzymes remain poorly understood. This paper describes the synthesis and spectral characterization of a series of fluorescent flavonols and their interaction with the β-glucosidase enzyme. To tune flavonol-enzyme interaction modes and affinity, we introduced different polar halogen-containing groups or bulky aromatic/alkyl substituents in the peripheral 2-aryl ring of a flavonol moiety. Using fluorescence spectroscopy methods in combination with molecular docking and molecular dynamics simulations, we examined the binding affinity and identified probe binding patterns, which are critical for steric blockage of the key catalytic residues of the enzyme. Using a fluorescent assay, we demonstrated that the binding of flavonol 2e to β-glucosidase decreased its enzymatic activity up to 3.5 times. In addition, our molecular docking and all-atom molecular dynamics simulations suggest that the probe binding is driven by hydrophobic interactions with aromatic Trp and Tyr residues within the catalytic glycone binding pockets of β-glucosidase. Our study provides a new insight into structure-property relations for flavonol-protein interactions, which govern their enzyme binding, and outlines a framework for a rational design of new flavonol-based potent inhibitors for β-glucosidases.
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Affiliation(s)
- Liudmyla V Chepeleva
- Institute of Chemistry, V.N. Karazin Kharkiv National University 4 Svobody Sq. Kharkiv 61022 Ukraine
| | - Oleksii O Demidov
- Institute of Chemistry, V.N. Karazin Kharkiv National University 4 Svobody Sq. Kharkiv 61022 Ukraine
| | - Arsenii D Snizhko
- Institute of Chemistry, V.N. Karazin Kharkiv National University 4 Svobody Sq. Kharkiv 61022 Ukraine
| | - Dmytro O Tarasenko
- Institute of Chemistry, V.N. Karazin Kharkiv National University 4 Svobody Sq. Kharkiv 61022 Ukraine
| | - Andrii Y Chumak
- Institute of Chemistry, V.N. Karazin Kharkiv National University 4 Svobody Sq. Kharkiv 61022 Ukraine
| | - Oleksii O Kolomoitsev
- Institute of Chemistry, V.N. Karazin Kharkiv National University 4 Svobody Sq. Kharkiv 61022 Ukraine
| | - Volodymyr M Kotliar
- Institute of Chemistry, V.N. Karazin Kharkiv National University 4 Svobody Sq. Kharkiv 61022 Ukraine
| | - Eugene S Gladkov
- Institute of Chemistry, V.N. Karazin Kharkiv National University 4 Svobody Sq. Kharkiv 61022 Ukraine
- State Scientific Institution "Institute for Single Crystals", National Academy of Sciences of Ukraine 60 Nauky Ave. Kharkiv 61072 Ukraine
| | - Alexander Kyrychenko
- Institute of Chemistry, V.N. Karazin Kharkiv National University 4 Svobody Sq. Kharkiv 61022 Ukraine
- State Scientific Institution "Institute for Single Crystals", National Academy of Sciences of Ukraine 60 Nauky Ave. Kharkiv 61072 Ukraine
| | - Alexander D Roshal
- Institute of Chemistry, V.N. Karazin Kharkiv National University 4 Svobody Sq. Kharkiv 61022 Ukraine
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Hu W, Su H, Zeng X, Duan X, Li Y, Li L. Exo-III Enzyme and DNAzyme-Assisted Dual Signal Recycles for Sensitive Analysis of Exosomes by Using Personal Glucose Meter. Appl Biochem Biotechnol 2023; 195:861-870. [PMID: 36219333 DOI: 10.1007/s12010-022-04171-5] [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] [Accepted: 09/28/2022] [Indexed: 01/24/2023]
Abstract
Exosome plays a crucial role in regulating intercellular communication during atherosclerosis development. However, sensitive and portable exosome detection remains a huge challenge. Herein, a personal glucose meter (PGM)-based exosomes detection approach has been proposed that allows detection of exosomes with a high sensitivity and reproducibility. In this method, a catch probe, which is composed of CD63 aptamer and blocker sequence, is utilized for the specific identification of exosomes. The blocker sequence binds with H probe to initiate the Exo-III-assisted signal recycles to generate numerous DNAzyme sequences. Under the assistance of the substrate, DNAzyme forms its active secondary structure to generate gap site in substrate, releasing a linker to conjugate sucrase to streptavidin magnetic beads (SMBs). After removing unbound sucrase, the SMB-linker-sucrase complex is used to catalyze sucrose to glucose, which can be read by PGMs. Based on this, the method exhibits a wide detection range and a low limit of detection, holding a promising prospect for the analysis of exosomes and screening atherosclerosis.
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Affiliation(s)
- Wenyi Hu
- Department of Cardiology, 958 Hospital of PLA Army, Chongqing, (400020), China
| | - Hailong Su
- Department of Cardiology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, (401120), China
| | - Xiaojuan Zeng
- Department of Cardiology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, (401120), China
| | - Xinglian Duan
- Department of Cardiology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, (401120), China
| | - Yangqiu Li
- Department of Cardiology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, (401120), China
| | - Li Li
- Department of Cardiology, The Third Affiliated Hospital of Chongqing Medical University, Chongqing, (401120), China.
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Determination of β-glucosidase activity using single-particle enumeration with Au@CeO2 nanoparticles. Mikrochim Acta 2022; 189:480. [DOI: 10.1007/s00604-022-05580-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 11/15/2022] [Indexed: 11/30/2022]
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9
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Tian T, Zhang WY, Zhou HY, Peng LJ, Zhou X, Zhang H, Yang FQ. A Catechol-Meter Based on Conventional Personal Glucose Meter for Portable Detection of Tyrosinase and Sodium Benzoate. BIOSENSORS 2022; 12:bios12121084. [PMID: 36551051 PMCID: PMC9776396 DOI: 10.3390/bios12121084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/22/2022] [Accepted: 11/24/2022] [Indexed: 05/28/2023]
Abstract
In this study, the personal glucose meter (PGM) was first used as a fast and user-friendly meter for analyzing catechol (CA) based on the reduction of the mediator K3[Fe(CN)6] to K4[Fe(CN)6] in the glucose test strip. Then, an easy, low-cost, and convenient PGM-based method for detecting tyrosinase (TYR) activity and sodium benzoate (SBA) was developed on the basis of the TYR-catalyzed reaction. In this method, CA is oxidized to form o-benzoquinone by TYR, thereby reducing the residual amount of CA and the PGM readout. On the other hand, SBA can inhibit the oxidation of CA catalyzed by TYR and increase the residual amount of CA after the enzymatic reaction. Therefore, the activity of TYR is proportional to the difference in the PGM readout of CA, and the concentration of SBA is positively correlated with the residual amount of CA. After the relevant experimental conditions were systematically optimized, the proposed PGM-based method for the detection of TYR and SBA was successfully validated. The liner ranges are 1.0-103.3 U/mL and 6.25-1000 ppm, and the quantification limits are 1.0 U/mL and 6.25 ppm for TYR and SBA, respectively. Moreover, the spiked recovery tests in normal human serum and carbonate beverages (i.e., Cola, Sprite, and Fanta) were performed, and the recoveries (91.6-106.8%) further confirm the applicability of the PGM-based method in real sample analysis.
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Affiliation(s)
- Tao Tian
- Chongqing Key Laboratory of High Active Traditional Chinese Drug Delivery System, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Wei-Yi Zhang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Hang-Yu Zhou
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Li-Jing Peng
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Xi Zhou
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Hao Zhang
- Chongqing Key Laboratory of High Active Traditional Chinese Drug Delivery System, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
| | - Feng-Qing Yang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
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10
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Zhang WY, Tian T, Peng LJ, Zhou HY, Zhang H, Chen H, Yang FQ. A Paper-Based Analytical Device Integrated with Smartphone: Fluorescent and Colorimetric Dual-Mode Detection of β-Glucosidase Activity. BIOSENSORS 2022; 12:893. [PMID: 36291030 PMCID: PMC9599113 DOI: 10.3390/bios12100893] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/15/2022] [Accepted: 10/16/2022] [Indexed: 06/16/2023]
Abstract
In this work, indoxyl-glucoside was used as the substrate to develop a cost-effective, paper-based analytical device for the fluorescent and colorimetric dual-mode detection of β-glucosidase activity through a smartphone. The β-glucosidase can hydrolyze the colorless substrate indoxyl-glucoside to release indoxyl, which will be self-oxidized to generate green products in the presence of oxygen. Meanwhile, the green products emit bright blue-green fluorescence under ultraviolet-visible light irradiation at 365 nm. Fluorescent or colorimetric images were obtained by a smartphone, and the red-green-blue channels were analyzed by the Adobe Photoshop to quantify the β-glucosidase activity. Under the optimum conditions, the relative fluorescent and colorimetric signals have a good linear relationship with the activity of β-glucosidase, in the range of 0.01-1.00 U/mL and 0.25-5.00 U/mL, and the limits of detection are 0.005 U/mL and 0.0668 U/mL, respectively. The activities of β-glucosidase in a crude almond sample measured by the fluorescent and colorimetric methods were 23.62 ± 0.53 U/mL and 23.86 ± 0.25 U/mL, respectively. In addition, the spiked recoveries of normal human serum and crude almond samples were between 87.5% and 118.0%. In short, the paper-based device, combined with a smartphone, can provide a simple, environmentally friendly, and low-cost method for the fluorescent and colorimetric dual-mode detection of β-glucosidase activity.
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Affiliation(s)
- Wei-Yi Zhang
- Chongqing Key Laboratory of High Active Traditional Chinese Drug Delivery System, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Tao Tian
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Li-Jing Peng
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Hang-Yu Zhou
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Hao Zhang
- Chongqing Key Laboratory of High Active Traditional Chinese Drug Delivery System, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
| | - Hua Chen
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
| | - Feng-Qing Yang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China
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A Simple and Portable Personal Glucose Meter Method Combined with Molecular Docking for Screening of Lipase Inhibitors. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2022; 2022:4430050. [PMID: 36185086 PMCID: PMC9522516 DOI: 10.1155/2022/4430050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 08/23/2022] [Accepted: 09/02/2022] [Indexed: 11/18/2022]
Abstract
With the increase of obesity incidence, the development of antiobesity drugs has aroused extensive interest. In this study, a simple and portable personal glucose meter (PGM) method based on the lipase-mediated reaction combined with molecular docking was developed for the screening of lipase inhibitors. Lipase can catalyse the hydrolysis of 4-acetamidophenyl acetate to form acetaminophen, which can directly trigger the reduction of K3[Fe(CN)6] to K4[Fe(CN)6] in the glucose test strips and generate an electrical signal that can be detected by the PGM. When lipase inhibitors exist, the yield of acetaminophen will be reduced and results in a corresponding decrease of the PGM signal. Therefore, the activity of lipase can be measured by the PGM. After optimization of the experimental conditions, the inhibitory activity of fourteen small-molecule compounds and fifteen natural product extracts on lipase were evaluated by the developed PGM method. The results indicate that tannic acid, (-)-epigallocatechin gallate, (-)-epigallocatechin, (-)-epicatechin gallate, and epicatechin have good inhibitory effect on lipase (% of inhibition higher than 40.0%). Besides, the natural product extracts of Galla Chinensis, lemon, and Rhei Radix et Rhizoma have a good inhibitory effect on lipase with % of inhibition of (97.5 ± 0.6)%, (88.1 ± 0.7)%, and (79.1 ± 1.6)%, respectively. Finally, the binding sites and modes of six small-molecule compounds on lipase were investigated by the molecular docking study. The results show that the developed PGM method is an effective approach for the discovery of potential lipase inhibitors.
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A simple and green method for direct determination of hydrogen peroxide and hypochlorite in household disinfectants based on personal glucose meter. Enzyme Microb Technol 2022; 155:109996. [DOI: 10.1016/j.enzmictec.2022.109996] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 12/24/2022]
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Zhang W, Bu S, Zhang J, Ma L, Liu X, Wang X, Li Z, Hao Z, Li Z, Wan J. Point-of-care detection of pathogenic bacteria based on pregnancy test strips and metal–organic frameworks. Microchem J 2022. [DOI: 10.1016/j.microc.2021.107142] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Snizhko AD, Kyrychenko AV, Gladkov ES. Synthesis of Novel Derivatives of 5,6,7,8-Tetrahydroquinazolines Using α-Aminoamidines and In Silico Screening of Their Biological Activity. Int J Mol Sci 2022; 23:3781. [PMID: 35409144 PMCID: PMC8999073 DOI: 10.3390/ijms23073781] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 12/15/2021] [Accepted: 12/17/2021] [Indexed: 02/05/2023] Open
Abstract
α-Aminoamidines are promising reagents for the synthesis of a diverse family of pyrimidine ring derivatives. Here, we demonstrate the use of α-aminoamidines for the synthesis of a new series of 5,6,7,8-tetrahydroquinazolines by their reaction with bis-benzylidene cyclohexanones. The reaction occurs in mild conditions and is characterized by excellent yields. It has easy workup, as compared to the existing methods of tetrahydroquinazoline preparation. Newly synthesized derivatives of 5,6,7,8-tetrahydroquinazoline bear protecting groups at the C2-tert-butyl moiety of a quinazoline ring, which can be easily cleaved, opening up further opportunities for their functionalization. Moreover, molecular docking studies indicate that the synthesized compounds reveal high binding affinity toward some essential enzymes of Mycobacterial tuberculosis, such as dihydrofolate reductase (DHFR), pantothenate kinase (MtPanK), and FAD-containing oxidoreductase DprE1 (MtDprE1), so that they may be promising candidates for the molecular design and the development of new antitubercular agents against multidrug-resistant strains of the Tubercle bacillus. Finally, the high inhibition activity of the synthesized compounds was also predicted against β-glucosidase, suggesting a novel tetrahydroquinazoline scaffold for the treatment of diabetes.
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Affiliation(s)
- Arsenii D. Snizhko
- Institute of Chemistry and School of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., 61022 Kharkiv, Ukraine; (A.D.S.); (A.V.K.)
| | - Alexander V. Kyrychenko
- Institute of Chemistry and School of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., 61022 Kharkiv, Ukraine; (A.D.S.); (A.V.K.)
| | - Eugene S. Gladkov
- Institute of Chemistry and School of Chemistry, V. N. Karazin Kharkiv National University, 4 Svobody Sq., 61022 Kharkiv, Ukraine; (A.D.S.); (A.V.K.)
- State Scientific Institution “Institute for Single Crystals”, National Academy of Sciences of Ukraine, 60 Nauky Ave, 61072 Kharkiv, Ukraine
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Aliaño-González MJ, Gabaston J, Ortiz-Somovilla V, Cantos-Villar E. Wood Waste from Fruit Trees: Biomolecules and Their Applications in Agri-Food Industry. Biomolecules 2022; 12:238. [PMID: 35204739 PMCID: PMC8961605 DOI: 10.3390/biom12020238] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 01/24/2022] [Accepted: 01/27/2022] [Indexed: 02/01/2023] Open
Abstract
In the European Union (EU), a total of 11,301,345 hectares are dedicated to the cultivation of fruit trees, mainly olive orchards, grapevines, nut trees (almond, walnut, chestnut, hazelnut, and pistachio), apple and pear trees, stone fruit trees (peach, nectarine, apricot, cherry, and plum), and citrus fruit trees (orange, clementine, satsuma, mandarin, lemon, grapefruit, and pomelo). Pruning these trees, together with plantation removal to a lesser extent, produces a huge amount of wood waste. A theoretical calculation of the wood waste in the European Union estimates approximately 2 and 25 million tons from wood plantation removal and pruning, respectively, per year. This wood waste is usually destroyed by in-field burning or crushing into the soil, which result in no direct economic benefits. However, wood from tree pruning, which is enriched in high added-value molecules, offers a wide spectrum of possibilities for its valorization. This review focuses on the contribution of wood waste to both sustainability and the circular economy, considering its use not only as biomass but also as a potential source of bioactive compounds. The main bioactive compounds found in wood are polyphenols, terpenes, polysaccharides, organic compounds, fatty acids, and alkaloids. Polyphenols are the most ubiquitous compounds in wood. Large amounts of hydroxytyrosol (up to 25 g/kg dw), resveratrol (up to 66 g/kg dw), protocatechuic acid (up to 16.4 g/kg), and proanthocyanins (8.5 g/kg dw) have been found in the wood from olive trees, grapevines, almond trees and plum trees, respectively. The bioactivity of these compounds has been demonstrated at lower concentrations, mainly in vitro studies. Bioactive compounds present antioxidant, antimicrobial, antifungal, biostimulant, anti-inflammatory, cardioprotective, and anticarcinogenic properties, among others. Therefore, wood extracts might have several applications in agriculture, medicine, and the food, pharmaceutical, nutraceutical, and cosmetics industries. For example, olive tree wood extract reduced thrombin-induced platelet aggregation in vitro; grapevine tree wood extract acts a preservative in wine, replacing SO2; chestnut tree wood extract has antifungal properties on postharvest pathogens in vitro; and stone tree wood extracts are used for aging both wines and brandies. Moreover, the use of wood waste contributes to the move towards both a more sustainable development and a circular economy.
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Affiliation(s)
- Maria Jose Aliaño-González
- IFAPA Rancho de la Merced, Consejería de Agricultura, Ganadería, Pesca y Desarrollo Sostenible, Junta de Andalucía, 11471 Jerez de la Frontera, Spain;
- Departamento de Química Analítica, Facultad de Ciencias, Universidad de Cádiz, 11510 Cadiz, Spain
| | - Julien Gabaston
- Departamento de Nutrición y Bromatología, Toxicología y Medicina Legal, Área de Nutrición y Bromatología, Facultad de Farmacia, Universidad de Sevilla, 41012 Seville, Spain;
| | - Victor Ortiz-Somovilla
- IFAPA Alameda del Obispo, Consejería de Agricultura, Ganadería, Pesca y Desarrollo Sostenible, Junta de Andalucía, Avenida Menéndez Pidal, 14004 Córdoba, Spain;
| | - Emma Cantos-Villar
- IFAPA Rancho de la Merced, Consejería de Agricultura, Ganadería, Pesca y Desarrollo Sostenible, Junta de Andalucía, 11471 Jerez de la Frontera, Spain;
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16
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Liu Z, Liu S, Gao D, Li Y, Tian Y, Bai E. An Optical Sensing Platform for Beta-Glucosidase Activity Using Protein-Inorganic Hybrid Nanoflowers. J Fluoresc 2022; 32:669-680. [PMID: 35040029 DOI: 10.1007/s10895-021-02859-1] [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: 05/24/2021] [Accepted: 11/22/2021] [Indexed: 10/19/2022]
Abstract
In this work, a convenient and dual-signal readout optical sensing platform for the sensitively and selectively determination of beta-glucosidase (β-Glu) activity was reported using protein-inorganic hybrid nanoflowers [BSA-Cu3(PO4)2·3H2O] possessing peroxidase-mimicking activity. The nanoflowers (NFs) were facilely synthesized through a self-assembled synthesis strategy at room temperature. The as-prepared NFs could catalytically convert the colorless and non-fluorescent Amplex Red into colored and highly fluorescent resorufin in the presence of hydrogen peroxide via electron transfer process. β-Glu could hydrolyze cyanogenic glycoside, using amygdalin (Amy) as a model, into cyanide ions (CN-), which can subsequently efficiently suppress the catalytic activity of NFs, accompanied with the fluorescence decrease and the color fading. The concentration of CN- was controlled by β-Glu-triggered enzymatic reaction of Amy. Thus, a sensing system was established for fluorescent and visual determination of β-Glu activity. Under the optimum conditions, the present fluorescent and visual bimodal sensing platform exhibited good sensitivity for β-Glu activity assay with a detection limit of 0.33 U·L-1. The sensing platform was further applied to determinate β-Glu in real samples and satisfactory results were attained. Additionally, the optical sensing system can potentially be a promising candidate for β-Glu inhibitors screening.
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Affiliation(s)
- Ziping Liu
- Key Laboratory of Geographical Processes and Ecological Security of Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China.,School of Geographical Sciences, Northeast Normal University, People's Street 5268, Changchun Jilin, 130024, China
| | - Shasha Liu
- Key Laboratory of Geographical Processes and Ecological Security of Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China
| | - Decai Gao
- Key Laboratory of Geographical Processes and Ecological Security of Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China.
| | - Yanan Li
- Key Laboratory for Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University, Changchun, Jilin Province, 130024, China
| | - Ye Tian
- Jilin Province Product Quality Supervision Testing Institute, Changchun, 130012, People's Republic of China
| | - Edith Bai
- Key Laboratory of Geographical Processes and Ecological Security of Changbai Mountains, Ministry of Education, School of Geographical Sciences, Northeast Normal University, Changchun, 130024, China.
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17
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Kim JH, Vinh LB, Hur M, Koo SC, Park WT, Moon YH, Lee YJ, Kim YH, Huh YC, Yang SY. Inhibitory Activity of 4- O-Benzoyl-3'- O-(OMethylsinapoyl) Sucrose from Polygala tenuifolia on Escherichia coliβ-Glucuronidase. J Microbiol Biotechnol 2021; 31:1576-1582. [PMID: 34528918 PMCID: PMC9705844 DOI: 10.4014/jmb.2108.08004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 12/15/2022]
Abstract
Bacterial β-glucuronidase in the intestine is involved in the conversion of 7-ethyl-10- hydroxycamptochecin glucuronide (derived from irinotecan) to 7-ethyl-10-hydroxycamptothecin, which causes intestinal bleeding and diarrhea (side effects of anti-cancer drugs). Twelve compounds (1-12) from Polygala tenuifolia were evaluated in terms of β-glucuronidase inhibition in vitro. 4-O-Benzoyl-3'-O-(O-methylsinapoyl) sucrose (C3) was highly inhibitory at low concentrations. C3 (an uncompetitive inhibitor) exhibited a ki value of 13.4 μM; inhibitory activity increased as the substrate concentration rose. Molecular simulation revealed that C3 bound principally to the Gln158-Tyr160 enzyme loop. Thus, C3 will serve as a lead compound for development of new β- glucuronidase inhibitors.
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Affiliation(s)
- Jang Hoon Kim
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, RDA, Eumseong 27709, Republic of Korea
| | - Le Ba Vinh
- Institute of Marine Biochemistry(IMBC), Vietnam Academy of Science and Technology(VAST), Hanoi 100000, Vietnam
| | - Mok Hur
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, RDA, Eumseong 27709, Republic of Korea
| | - Sung-Cheol Koo
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, RDA, Eumseong 27709, Republic of Korea
| | - Woo Tae Park
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, RDA, Eumseong 27709, Republic of Korea
| | - Youn-Ho Moon
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, RDA, Eumseong 27709, Republic of Korea
| | - Yoon Jeong Lee
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, RDA, Eumseong 27709, Republic of Korea
| | - Young Ho Kim
- College of Pharmacy, Chungnam National University, Daejeon 34134, Republic of Korea
| | - Yun-Chan Huh
- Department of Herbal Crop Research, National Institute of Horticultural and Herbal Science, RDA, Eumseong 27709, Republic of Korea,
Y.C. Huh Phone: +82-43-871-5662 Fax: +82-43-871-5659 E-mail:
| | - Seo Young Yang
- Department of Pharmaceutical Engineering, Sangji University, Wonju 26339, Republic of Korea,Corresponding authors S.Y. Yang Phone: +82-33-738-7921 Fax: +82-33-738-7652 E-mail:
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18
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Zhang P, Zhang R, Sirisena S, Gan R, Fang Z. Beta-glucosidase activity of wine yeasts and its impacts on wine volatiles and phenolics: A mini-review. Food Microbiol 2021; 100:103859. [PMID: 34416959 DOI: 10.1016/j.fm.2021.103859] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 06/04/2021] [Accepted: 06/06/2021] [Indexed: 10/21/2022]
Abstract
Beta-glucosidase is an important enzyme for the hydrolysis of grape glycosides in the course of winemaking. Yeasts are the main producers of β-glucosidase in winemaking, therefore play an important role in determining wine aroma and flavour. This article discusses common methods for β-glucosidase evaluation, the β-glucosidase activity of different Saccharomyces and non- Saccharomyces yeasts and the influences of winemaking conditions, such as glucose and ethanol concentration, low pH environment, fermentation temperature and SO2 level, on their activity. This review further highlights the roles of β-glucosidase in promoting the release of free volatile compounds especially terpenes and the modification of wine phenolic composition during the winemaking process. Furthermore, this review proposes future research direction in this area and guides wine professionals in yeast selection to improve wine quality.
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Affiliation(s)
- Pangzhen Zhang
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, 3030, Australia.
| | - Ruige Zhang
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, 3030, Australia
| | - Sameera Sirisena
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, 3030, Australia
| | - Renyou Gan
- Research Center for Plants and Human Health, Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, 610213, China; Key Laboratory of Coarse Cereal Processing (Ministry of Agriculture and Rural Affairs), Sichuan Engineering & Technology Research Center of Coarse Cereal Industrialization, Chengdu University, Chengdu, 610106, China
| | - Zhongxiang Fang
- School of Agriculture and Food, Faculty of Veterinary and Agricultural Sciences, The University of Melbourne, Parkville, Victoria, 3030, Australia
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Determination of the Chemical Composition, Antioxidant, and Enzyme Inhibitory Activity of Onosma mollis DC. J CHEM-NY 2021. [DOI: 10.1155/2021/5405365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Onosma species have long been used traditionally for respiratory tract infections, abdominal pain, wound treatment, burns, and constipation. This study aims to investigate the chemical composition and in vitro antioxidant and enzyme inhibitory activities of ethyl acetate (EtOAc), methanol (MeOH), and water extracts of Onosma mollis DC. MeOH extract was richer in both phenolics and flavonoids than other extracts (44.06 mg GAEs/g and 41.57 mg QEs/g, respectively). The findings obtained from the results of the chromatographic analysis also supported the results of the spectrophotometric analysis. The MeOH extract was the richest in terms of most of the phytochemicals screened. Apigenin 7-glucoside, luteolin 7-glucoside, rosmarinic acid, vanillic acid, and pinoresinol were over 1000.0 μg/g in MeOH extract. The extract in question showed the highest activity in phosphomolybdenum, DPPH, and ABTS radical scavenging and CUPRAC and FRAP reducing power activity assays (2.01, 3.33, 2.30, 1.48, and 0.79 mg/ml, respectively). The water extract presented the highest activity in the ferrous ion chelating assay (1.01 mg/ml). While EtOAc extract showed high activity in acetylcholinesterase (AChE), butyrylcholinesterase (BChE), and α-glucosidase inhibitory activity tests (1.11, 1.49, and 1.07 mg/ml, respectively), MeOH extract showed significant efficacy in tyrosinase and α-amylase inhibitory activity assays (2.94 and 2.08 mg/ml, respectively). There was a high correlation between the total phenolics/flavonoids of the extracts and their antioxidant activities (correlation coefficients were over 0.9). In addition, the phytochemicals mentioned above were found to contribute significantly to the antioxidant activity. It was concluded that a more detailed analysis should be done to determine the compounds responsible for the enzyme inhibitory activities of the extracts.
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Tian T, Chen GY, Zhang H, Yang FQ. Personal Glucose Meter for α-Glucosidase Inhibitor Screening Based on the Hydrolysis of Maltose. Molecules 2021; 26:molecules26154638. [PMID: 34361791 PMCID: PMC8348101 DOI: 10.3390/molecules26154638] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 07/26/2021] [Accepted: 07/27/2021] [Indexed: 01/14/2023] Open
Abstract
As a key enzyme regulating postprandial blood glucose, α-Glucosidase is considered to be an effective target for the treatment of diabetes mellitus. In this study, a simple, rapid, and effective method for enzyme inhibitors screening assay was established based on α-glucosidase catalyzes reactions in a personal glucose meter (PGM). α-glucosidase catalyzes the hydrolysis of maltose to produce glucose, which triggers the reduction of ferricyanide (K3[Fe(CN)6]) to ferrocyanide (K4[Fe(CN)6]) and generates the PGM detectable signals. When the α-glucosidase inhibitor (such as acarbose) is added, the yield of glucose and the readout of PGM decreased accordingly. This method can achieve the direct determination of α-glucosidase activity by the PGM as simple as the blood glucose tests. Under the optimal experimental conditions, the developed method was applied to evaluate the inhibitory activity of thirty-four small-molecule compounds and eighteen medicinal plants extracts on α-glucosidase. The results exhibit that lithospermic acid (52.5 ± 3.0%) and protocatechualdehyde (36.8 ± 2.8%) have higher inhibitory activity than that of positive control acarbose (31.5 ± 2.5%) at the same final concentration of 5.0 mM. Besides, the lemon extract has a good inhibitory effect on α-glucosidase with a percentage of inhibition of 43.3 ± 3.5%. Finally, the binding sites and modes of four active small-molecule compounds to α-glucosidase were investigated by molecular docking analysis. These results indicate that the PGM method is feasible to screening inhibitors from natural products with simple and rapid operations.
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Affiliation(s)
- Tao Tian
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China; (T.T.); (G.-Y.C.)
| | - Guo-Ying Chen
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China; (T.T.); (G.-Y.C.)
| | - Hao Zhang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China; (T.T.); (G.-Y.C.)
- Chongqing Key Laboratory of High Active Traditional Chinese Drug Delivery System, Chongqing Medical and Pharmaceutical College, Chongqing 401331, China
- Correspondence: (H.Z.); (F.-Q.Y.); Tel.: +86-138-9621-7134 (H.Z.); +86-136-1765-0637 (F.-Q.Y.)
| | - Feng-Qing Yang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China; (T.T.); (G.-Y.C.)
- Correspondence: (H.Z.); (F.-Q.Y.); Tel.: +86-138-9621-7134 (H.Z.); +86-136-1765-0637 (F.-Q.Y.)
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21
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Zhao CP, Chen GY, Wang Y, Chen H, Yu JW, Yang FQ. Evaluation of Enzyme Inhibitory Activity of Flavonoids by Polydopamine-Modified Hollow Fiber-Immobilized Xanthine Oxidase. Molecules 2021; 26:molecules26133931. [PMID: 34203179 PMCID: PMC8271864 DOI: 10.3390/molecules26133931] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/24/2021] [Accepted: 06/24/2021] [Indexed: 01/20/2023] Open
Abstract
In this study, a polydopamine (PDA)-modified hollow fiber-immobilized xanthine oxidase (XOD) was prepared for screening potential XOD inhibitors from flavonoids. Several parameters for the preparation of PDA-modified hollow fiber-immobilized XOD, including the dopamine concentration, modification time, XOD concentration and immobilization time, were optimized. The results show that the optimal conditions for immobilized XOD activity were a dopamine concentration of 2.0 mg/mL in 10.0 mM Tris-HCl buffer (pH 8.5), a modification time of 3.0 h, an XOD concentration of 1000 μg/mL in 10.0 mM phosphate buffer (pH 7.5) and an immobilization time of 3.0 h. Subsequently, the enzymatic reaction conditions such as the pH value and temperature were investigated, and the enzyme kinetics and inhibition parameters were determined. The results indicate that the optimal pH value (7.5) and temperature (37 °C) of the PDA-modified hollow fiber-immobilized XOD were consistent with the free enzyme. Moreover, the PDA-modified hollow fiber-immobilized XOD could still maintain above 50% of its initial immobilized enzyme activity after seven consecutive cycles. The Michaelis–Menten constant (Km) and the half-maximal inhibitory concentration (IC50) of allopurinol on the immobilized XOD were determined as 0.25 mM and 23.2 μM, respectively. Furthermore, the PDA-modified hollow fiber-immobilized XOD was successfully applied to evaluate the inhibitory activity of eight flavonoids. Quercetin, apigenin, puerarin and epigallocatechin showed a good inhibition effect, and their percentages of inhibition were (79.86 ± 3.50)%, (80.98 ± 0.64)%, (61.15 ± 6.26)% and (54.92 ± 0.41)%, respectively. Finally, molecular docking analysis further verified that these four active compounds could bind to the amino acid residues in the XOD active site. In summary, the PDA-modified hollow fiber-immobilized XOD is an efficient method for the primary screening of XOD inhibitors from natural products.
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Affiliation(s)
- Cong-Peng Zhao
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China; (C.-P.Z.); (G.-Y.C.); (Y.W.); (H.C.)
| | - Guo-Ying Chen
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China; (C.-P.Z.); (G.-Y.C.); (Y.W.); (H.C.)
| | - Yuan Wang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China; (C.-P.Z.); (G.-Y.C.); (Y.W.); (H.C.)
| | - Hua Chen
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China; (C.-P.Z.); (G.-Y.C.); (Y.W.); (H.C.)
| | - Jia-Wen Yu
- Taiji Group Chongqing Fuling Pharmaceutical Co., Ltd., Chongqing 408000, China
- Correspondence: (J.-W.Y.); (F.-Q.Y.); Tel.: +86-139-8330-0448 (J.-W.Y.); +86-136-1765-0637 (F.-Q.Y.)
| | - Feng-Qing Yang
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, China; (C.-P.Z.); (G.-Y.C.); (Y.W.); (H.C.)
- Correspondence: (J.-W.Y.); (F.-Q.Y.); Tel.: +86-139-8330-0448 (J.-W.Y.); +86-136-1765-0637 (F.-Q.Y.)
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Lee J, Kim S, Chung HY, Kang A, Kim S, Hwang H, Yang SI, Yun WS. Electrochemical microgap immunosensors for selective detection of pathogenic Aspergillus niger. JOURNAL OF HAZARDOUS MATERIALS 2021; 411:125069. [PMID: 33454571 DOI: 10.1016/j.jhazmat.2021.125069] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 12/18/2020] [Accepted: 01/02/2021] [Indexed: 06/12/2023]
Abstract
Aspergillus niger (A. niger) is a well-known allergenic, harmful fungus in the indoor environment that can cause asthmatic symptoms and atopy. Previous immunosensing approach suffers from an insufficient detection limit, mainly because there are no techniques for target amplification. We report an electrochemical immunosensor that selectively quantifies the A. niger based on the detection of extracellular proteins by using a specific interaction with antibody. The sensor was designed to show a decrease in redox current upon binding of the antigens secreted from A. niger onto an antibody-immobilized surface between the interdigitated electrodes. The extracellular proteins were profiled by LC-MS/MS to identify the antigens existing in the A. niger solution. Since the targets of the sensor are the proteins, its sensitivity and selectivity remain almost intact even after filtration of the spores. It was also found that the use of secretion promoter in the sampling stage greatly improved the sensor's limit of detection (LOD) for the spores. By this, the LOD was lowered by a few orders of magnitude so as to reach the value as low as ~101 spores/mL.
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Affiliation(s)
- Jisu Lee
- Department of Chemistry, Sungkyunkwan University, Suwon 16429, Republic of Korea
| | - Semee Kim
- Department of Chemistry, Sungkyunkwan University, Suwon 16429, Republic of Korea
| | - Ha Young Chung
- Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea
| | - Aeyeon Kang
- Nano/Bio Fusion Technology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Seunghun Kim
- Department of Chemistry, Sungkyunkwan University, Suwon 16429, Republic of Korea
| | - Heeyoun Hwang
- Research Center for Bioconvergence Analysis, Korea Basic Science Institute, Cheongju 28119, Republic of Korea
| | - Sung Ik Yang
- Department of Applied Chemistry, Kyung Hee University, Yongin 17104, Republic of Korea.
| | - Wan Soo Yun
- Department of Chemistry, Sungkyunkwan University, Suwon 16429, Republic of Korea; Nano/Bio Fusion Technology Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea.
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