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Walencik PK, Choińska R, Gołębiewska E, Kalinowska M. Metal-Flavonoid Interactions-From Simple Complexes to Advanced Systems. Molecules 2024; 29:2573. [PMID: 38893449 PMCID: PMC11173564 DOI: 10.3390/molecules29112573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2024] [Revised: 05/27/2024] [Accepted: 05/27/2024] [Indexed: 06/21/2024] Open
Abstract
For many years, metal-flavonoid complexes have been widely studied as a part of drug discovery programs, but in the last decade their importance in materials science has increased significantly. A deeper understanding of the role of metal ions and flavonoids in constructing simple complexes and more advanced hybrid networks will facilitate the assembly of materials with tailored architecture and functionality. In this Review, we highlight the most essential data on metal-flavonoid systems, presenting a promising alternative in the design of hybrid inorganic-organic materials. We focus mainly on systems containing CuII/I and FeIII/II ions, which are necessary in natural and industrial catalysis. We discuss two kinds of interactions that typically ensure the formation of metal-flavonoid systems, namely coordination and redox reactions. Our intention is to cover the fundamentals of metal-flavonoid systems to show how this knowledge has been already transferred from small molecules to complex materials.
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Affiliation(s)
- Paulina Katarzyna Walencik
- Institute of Agricultural and Food Biotechnology-State Research Institute, Rakowiecka 36, 02-532 Warsaw, Poland;
| | - Renata Choińska
- Institute of Agricultural and Food Biotechnology-State Research Institute, Rakowiecka 36, 02-532 Warsaw, Poland;
| | - Ewelina Gołębiewska
- Department of Chemistry, Biology and Biotechnology, Faculty of Civil and Environmental Sciences, Bialystok University of Technology, Wiejska 45E Street, 15-351 Bialystok, Poland;
| | - Monika Kalinowska
- Department of Chemistry, Biology and Biotechnology, Faculty of Civil and Environmental Sciences, Bialystok University of Technology, Wiejska 45E Street, 15-351 Bialystok, Poland;
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2
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Beeckman F, Drozdzecki A, De Knijf A, Corrochano-Monsalve M, Bodé S, Blom P, Goeminne G, González-Murua C, Lücker S, Boeckx P, Stevens CV, Audenaert D, Beeckman T, Motte H. Drug discovery-based approach identifies new nitrification inhibitors. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 346:118996. [PMID: 37725864 DOI: 10.1016/j.jenvman.2023.118996] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2023] [Revised: 08/24/2023] [Accepted: 09/09/2023] [Indexed: 09/21/2023]
Abstract
Nitrogen (N) fertilization is crucial to sustain global food security, but fertilizer N production is energy-demanding and subsequent environmental N losses contribute to biodiversity loss and climate change. N losses can be mitigated be interfering with microbial nitrification, and therefore the use of nitrification inhibitors in enhanced efficiency fertilizers (EEFs) is an important N management strategy to increase N use efficiency and reduce N pollution. However, currently applied nitrification inhibitors have limitations and do not target all nitrifying microorganisms. Here, to identify broad-spectrum nitrification inhibitors, we adopted a drug discovery-based approach and screened 45,400 small molecules on different groups of nitrifying microorganisms. Although a high number of potential nitrification inhibitors were identified, none of them targeted all nitrifier groups. Moreover, a high number of new nitrification inhibitors were shown to be highly effective in culture but did not reduce ammonia consumption in soil. One archaea-targeting inhibitor was not only effective in soil, but even reduced - when co-applied with a bacteria-targeting inhibitor - ammonium consumption and greenhouse gas emissions beyond what is achieved with currently applied nitrification inhibitors. This advocates for combining different types of nitrification inhibitors in EEFs to optimize N management practices and make agriculture more sustainable.
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Affiliation(s)
- Fabian Beeckman
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052, Ghent, Belgium; VIB Center for Plant Systems Biology, Technologiepark 71, 9052, Ghent, Belgium
| | - Andrzej Drozdzecki
- Ghent University Centre for Bioassay Development and Screening (C-BIOS), 9052, Ghent, Belgium; VIB Screening Core, Technologiepark 71, 9052, Ghent, Belgium
| | - Alexa De Knijf
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052, Ghent, Belgium; VIB Center for Plant Systems Biology, Technologiepark 71, 9052, Ghent, Belgium
| | - Mario Corrochano-Monsalve
- Department of Plant Biology and Ecology, University of the Basque Country-UPV/EHU, Apdo. 644, Bilbao, E-48080, Spain
| | - Samuel Bodé
- Laboratory of Applied Physical Chemistry (ISOFYS), Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Pieter Blom
- Department of Microbiology, RIBES, Radboud University, Heyendaalseweg 135, 6525, AJ, Nijmegen, the Netherlands
| | - Geert Goeminne
- VIB Metabolomics Core, Technologiepark 71, 9052, Ghent, Belgium
| | - Carmen González-Murua
- Department of Plant Biology and Ecology, University of the Basque Country-UPV/EHU, Apdo. 644, Bilbao, E-48080, Spain
| | - Sebastian Lücker
- Department of Microbiology, RIBES, Radboud University, Heyendaalseweg 135, 6525, AJ, Nijmegen, the Netherlands
| | - Pascal Boeckx
- Laboratory of Applied Physical Chemistry (ISOFYS), Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Christian V Stevens
- Synthesis, Bioresources and Bioorganic Chemistry Research Group (SynBioC), Department of Green Chemistry and Technology, Ghent University, Coupure Links 653, 9000, Ghent, Belgium
| | - Dominique Audenaert
- Ghent University Centre for Bioassay Development and Screening (C-BIOS), 9052, Ghent, Belgium; VIB Screening Core, Technologiepark 71, 9052, Ghent, Belgium
| | - Tom Beeckman
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052, Ghent, Belgium; VIB Center for Plant Systems Biology, Technologiepark 71, 9052, Ghent, Belgium.
| | - Hans Motte
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 71, 9052, Ghent, Belgium; VIB Center for Plant Systems Biology, Technologiepark 71, 9052, Ghent, Belgium.
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3
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Insights into the complexation and oxidation of quercetin and luteolin in aqueous solutions in presence of selected metal cations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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4
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Jańczak-Pieniążek M, Migut D, Piechowiak T, Balawejder M. Assessment of the Impact of the Application of a Quercetin-Copper Complex on the Course of Physiological and Biochemical Processes in Wheat Plants ( Triticum aestivum L.) Growing under Saline Conditions. Cells 2022; 11:cells11071141. [PMID: 35406704 PMCID: PMC8997712 DOI: 10.3390/cells11071141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 03/25/2022] [Accepted: 03/26/2022] [Indexed: 11/16/2022] Open
Abstract
Salt stress is one of the main stressors limiting plant growth and yield. As a result of salt stress, unfavorable changes in the photosynthesis process take place, leading to a decrease in plant productivity. Therefore, it is necessary to use biologically active substances that reduce the effects of this stress. An example of such a substance is quercetin, classified as a flavonoid, which plays an important role in alleviating the effects of salt stress, mainly by the inactivation of reactive oxygen species (ROS) and by improvement of the photosynthesis process. A study was made of the effect of the quercetin–copper complex (Q-Cu (II)), which has a stronger antioxidant effect than pure quercetin. By means of a pot experiment, the influence of solutions of the Q-Cu (II) complex (100 mg∙L−1 [Q1], 500 mg∙L−1 [Q2] and 1000 mg∙L−1 [Q3]) on the physiological and biochemical processes occurring in wheat plants subjected to salt stress was investigated. The plants were given two sprays of Q-Cu (II) solution, and their physiological parameters were examined both 1 and 7 days after each application of this solution. The level of ROS and the activity of antioxidant enzymes (catalase [CAT], superoxide dismutase [SOD] and guaiacol peroxidase [GPOX]) were also determined. It has been shown that spraying with Q2 and Q3 solutions improves the chlorophyll content, the values of chlorophyll fluorescence parameters (the photochemical efficiency of PS II [Fv/Fm], the maximum quantum yield of primary photochemistry [Fv/F0], and the performance index of PS II [PI]), and gas exchange (net photosynthetic rate [Pn], stomatal conductance [gs], transpiration rate [E] and intercellular CO2 concentration [Ci]). As a result of the application of Q2 and Q3 solutions, the level of ROS and the activity of the antioxidant enzymes tested decreased, which means that these concentrations are most effective in counteracting the effects of salt stress.
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Affiliation(s)
- Marta Jańczak-Pieniążek
- Department of Crop Production, University of Rzeszow, Zelwerowicza 4, 35-601 Rzeszow, Poland;
- Correspondence:
| | - Dagmara Migut
- Department of Crop Production, University of Rzeszow, Zelwerowicza 4, 35-601 Rzeszow, Poland;
| | - Tomasz Piechowiak
- Department of Food Chemistry and Toxicology, University of Rzeszow, Ćwiklińskiej 1A, 35-601 Rzeszów, Poland; (T.P.); (M.B.)
| | - Maciej Balawejder
- Department of Food Chemistry and Toxicology, University of Rzeszow, Ćwiklińskiej 1A, 35-601 Rzeszów, Poland; (T.P.); (M.B.)
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5
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Hanada A, Morimoto R, Horio Y, Shichiri M, Nakashima A, Ogawa T, Suzuki K, Sumitani H, Ogata T, Isegawa Y. Influenza virus entry and replication inhibited by 8-prenylnaringenin from Citrullus lanatus var. citroides (wild watermelon). Food Sci Nutr 2022; 10:926-935. [PMID: 35282012 PMCID: PMC8907720 DOI: 10.1002/fsn3.2725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Revised: 12/11/2021] [Accepted: 12/22/2021] [Indexed: 12/05/2022] Open
Abstract
We previously demonstrated the anti-influenza activity of Citrullus lanatus var. citroides (wild watermelon, WWM); however, the active ingredient was unknown. Here, we performed metabolomic analysis to evaluate the ingredients of WWM associated with antiviral activity. Many low-molecular weight compounds were identified, with flavonoids accounting for 35% of all the compounds in WWM juice. Prenylated flavonoids accounted for 30% of the flavonoids. Among the measurable components of phytoestrogens in WWM juice, 8-prenylnaringenin showed the highest antiviral activity. We synthesized 8-prenylnaringenin and used liquid chromatography-mass spectrometry to quantitate the active ingredient in WWM. The antiviral activities of 8-prenylnaringenin were observed against H1N1 and H3N2 influenza A subtypes and influenza B viruses. Moreover, 8-prenylnaringenin was found to inhibit virus adsorption and late-stage virus replication, suggesting that the mechanisms of action of 8-prenylnaringenin may differ from those of amantadine and oseltamivir. We confirmed that 8-prenylnaringenin strongly inhibited the viral entry of all the influenza virus strains that were examined, including those resistant to the anti-influenza drugs oseltamivir and amantadine. This result indicates that 8-prenylnaringenin may activate the host cell's defense mechanisms, rather than directly acting on the influenza virus. Since 8-prenylnaringenin did not inhibit late-stage virus replication of oseltamivir-resistant strains, 8-prenylnaringenin may interact directly with viral neuraminidase. These results are the first report on the anti-influenza virus activity of 8-prenylnaringenin. Our results highlight the potential of WWM and phytoestrogens to develop effective prophylactic and therapeutic approaches to the influenza virus.
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Affiliation(s)
- Akari Hanada
- Department of Food Sciences and NutritionMukogawa Women’s UniversityNishinomiyaJapan
| | - Ryosuke Morimoto
- Department of Food Sciences and NutritionMukogawa Women’s UniversityNishinomiyaJapan
- Present address:
Faculty of Human Life ScienceShikoku UniversityTokushimaJapan
| | - Yuka Horio
- Department of Food Sciences and NutritionMukogawa Women’s UniversityNishinomiyaJapan
| | - Mototada Shichiri
- Biomedical Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST)IkedaJapan
| | | | | | | | | | - Tokutaro Ogata
- Faculty of Health and Medical SciencesHokuriku UniversityKanazawaJapan
| | - Yuji Isegawa
- Department of Food Sciences and NutritionMukogawa Women’s UniversityNishinomiyaJapan
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6
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Kumawat M, Madhyastha H, Umapathi A, Singh M, Revaprasadu N, Daima HK. Surface Engineered Peroxidase-Mimicking Gold Nanoparticles to Subside Cell Inflammation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:1877-1887. [PMID: 35099982 DOI: 10.1021/acs.langmuir.1c03088] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The smart design of nanoparticles with varying surfaces may open a new avenue for potential biomedical applications. Consequently, several approaches have been established for controlled synthesis to develop the unique physicochemical properties of nanoparticles. However, many of the synthesis and functionalization methods are chemical-based and might be toxic to limit the full potential of nanoparticles. Here, curcumin (a plant-derived material) based synthesis of gold (Au) nanoparticles, followed by the development of a suitable exterior corona using isoniazid (INH, antibiotic), tyrosine (Tyr, amino acid), and quercetin (Qrc, antioxidant), is reported. All these nanoparticles (Cur-Au, Cur-AuINH, Cur-AuTyr, and Cur-AuQrc) possess inherent peroxidase-mimicking natures depending on the surface corona of respective nanoparticles, and they are found to be excellent candidates for free radical scavenging action. The peroxidase-mimicking nanoparticle interactions with red blood cells and mouse macrophages confirmed their hemo- and biocompatible nature. Moreover, these surface-engineered Au nanoparticles were found to be suitable in subsiding key pro-inflammatory cytokines such as interleukin-6 (IL-6), tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β). The inherent peroxidase-mimicking behavior and anti-inflammatory potential without any significant toxicity of these nanoparticles may open new prospects for nanomedicine.
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Affiliation(s)
- Mamta Kumawat
- Amity Center for Nanobiotechnology and Nanomedicine (ACNN), Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur 303002, Rajasthan, India
| | - Harishkumar Madhyastha
- Department of Applied Physiology, Faculty of Medicine, University of Miyazaki, Miyazaki 8891692, Japan
| | - Akhela Umapathi
- Amity Center for Nanobiotechnology and Nanomedicine (ACNN), Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur 303002, Rajasthan, India
| | - Mandeep Singh
- School of Science, RMIT University, Melbourne, Victoria 3000, Australia
| | - Neerish Revaprasadu
- Department of Chemistry, University of Zululand, Private Bag X1001, KwaDlangezwa 3880, South Africa
| | - Hemant Kumar Daima
- Amity Center for Nanobiotechnology and Nanomedicine (ACNN), Amity Institute of Biotechnology, Amity University Rajasthan, Jaipur 303002, Rajasthan, India
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7
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ÖZTÜRK KİRAZ A, YALÇIN F. Structure-Activity and Antioxidant Properties of Quercetin and Its Co2+ Chelate. INTERNATIONAL JOURNAL OF SECONDARY METABOLITE 2021. [DOI: 10.21448/ijsm.954992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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8
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Shastrala K, Kalam S, Damerakonda K, Sheshagiri SBB, Kumar H, Guda R, Kasula M, Bedada SK. Synthesis, characterization, and pharmacological evaluation of some metal complexes of quercetin as P-gp inhibitors. FUTURE JOURNAL OF PHARMACEUTICAL SCIENCES 2021. [DOI: 10.1186/s43094-021-00252-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Abstract
Background
Six different metal complexes of quercetin (Cu, Zn, Co, Vd, Mo, Ni) were synthesized, purified, and characterized by their physical and spectral (UV, IR) data. They were evaluated for their P-gp (permeability glycoprotein) inhibitory activity by in vitro everted sac method in rats. The apparent permeability of atorvastatin (P-gp substrate) from everted sac of the rat intestine was determined in control, standard (verapamil), and groups treated with quercetin-metal complexes. The drug contents were analyzed by validated RP-HPLC method using a mixture of acetonitrile and water (60:40 v/v) adjusted to pH 2.8 with phosphate buffer as mobile phase.
Results
In vitro studies revealed that the apparent permeability of atorvastatin (P-gp substrate) across the small intestine is much affected by the treatment with Cu/Co/Ni complexes of quercetin. The mean ± SD and apparent permeability of atorvastatin decreased after pre-treatment with these metal complexes.
Conclusions
The quercetin Cu/Co/Ni complexes could inhibit P-gp and increase the atorvastatin absorption. Hence, they could be considered P-gp inhibitors.
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9
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Lewis T, Wallace W, Peterson FD, Rafferty S, Martic S. Reactivities of quercetin and metallo‐quercetin with superoxide anion radical and molecular oxygen. ELECTROCHEMICAL SCIENCE ADVANCES 2021. [DOI: 10.1002/elsa.202100054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Affiliation(s)
- Tyra Lewis
- Department of Forensic Science Environmental and Life Sciences Program Trent University Peterborough Ontario Canada
| | - William Wallace
- Department of Forensic Science Environmental and Life Sciences Program Trent University Peterborough Ontario Canada
| | - Finlay Dingman Peterson
- Department of Forensic Science Environmental and Life Sciences Program Trent University Peterborough Ontario Canada
| | - Steven Rafferty
- Department of Chemistry Environmental and Life Sciences Program Trent University Peterborough Ontario Canada
| | - Sanela Martic
- Department of Forensic Science Environmental and Life Sciences Program Trent University Peterborough Ontario Canada
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10
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Budziak-Wieczorek I, Maciołek U. Synthesis and Characterization of a (-)-Epicatechin and Barbituric Acid Cocrystal: Single-Crystal X-ray Diffraction and Vibrational Spectroscopic Studies. ACS OMEGA 2021; 6:8199-8209. [PMID: 33817479 PMCID: PMC8014927 DOI: 10.1021/acsomega.0c06239] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/04/2021] [Indexed: 05/27/2023]
Abstract
The paper presents the contribution of the cocrystallization method in the physicochemical modification of catechins that exhibit low oral bioavailability. This was done to obtain cocrystals for two naturally occurring polyphenolic diastereoisomers (+)-catechin and (-)-epicatechin with commonly used coformers. Due to distinct crystallization behavior, only the (-)-epicatechin cocrystal with barbituric acid in a 1:1 stoichiometry was obtained. The cocrystal of (-)-epicatechin (EC) with barbituric acid (BTA) was prepared by the slow solvent-evaporation technique. The structure and intermolecular interactions were determined by X-ray crystallographic techniques. The analysis of packing and interactions in the crystal lattice revealed that molecules in the target cocrystal were packed into tapes, formed by the O-H···O type contacts between the (-)-epicatechin and coformer molecules. The EC molecules interact with the carboxyl group in the BTA coformer mainly by -OH groups from the benzene ring A. The cocrystalline phase constituents were also investigated in terms of Hirshfeld surfaces. The application of Raman spectroscopy confirmed the involvement of the C=O group in the formation of hydrogen bonds between the (-)-epicatechin and barbituric acid molecules. Additionally, the solubility studies of pure EC and the EC-BTA cocrystal exhibited minor enhancement of EC solubility in the buffer solution, and pH measurements confirmed a stable level of solubility for EC and its cocrystal.
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Affiliation(s)
- Iwona Budziak-Wieczorek
- Department
of Chemistry, University of Life Sciences
in Lublin, Akademicka 15, 20-950 Lublin, Poland
| | - Urszula Maciołek
- Analytical
Laboratory, Institute of Chemical Sciences, Faculty of Chemistry, Maria Curie-Sklodowska University, pl. M. Curie-Skłodowskiej
3, 20-031 Lublin, Poland
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11
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Corrente GA, Malacaria L, Beneduci A, Furia E, Marino T, Mazzone G. Experimental and theoretical study on the coordination properties of quercetin towards aluminum(III), iron(III) and copper(II) in aqueous solution. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.115171] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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12
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Mazzone G, De Simone BC, Marino T, Russo N. Theoretical investigation on bisarylselanylbenzo-2,1,3-selenadiazoles as potential photosensitizers in photodynamic therapy. J Chem Phys 2021; 154:084113. [PMID: 33639755 DOI: 10.1063/5.0038326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Density functional theory and time-dependent (TDDFT) calculations were carried out for recently reported bisarylselanylbenzo-2,1,3-selenadiazoles derivatives capable of producing singlet oxygen (1O2) under UV-Vis irradiation. Conformational behaviors, excitation energies, singlet-triplet energy gaps, and spin-orbit coupling constants were evaluated. The conformational analysis evidences that two different conformers have to be taken into consideration to completely describe the photophysical properties of this class of molecules. TDDFT results show that these compounds, though possessing absorption wavelengths that fall in the violet region, are characterized by singlet-triplet energy gaps greater than the energy required to excite the molecular oxygen, thus being able to produce the cytotoxic species, spin-orbit coupling constants large enough to ensure efficient singlet-triplet intersystem spin crossing, and even the highly reactive superoxide anion O2 •(-) by autoionization and subsequent electron transfer to molecular oxygen in its ground state.
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Affiliation(s)
- Gloria Mazzone
- Dipartimento di Chimica e Tecnologie Chimiche, Università Della Calabria, Rende, Italy
| | - Bruna Clara De Simone
- Dipartimento di Chimica e Tecnologie Chimiche, Università Della Calabria, Rende, Italy
| | - Tiziana Marino
- Dipartimento di Chimica e Tecnologie Chimiche, Università Della Calabria, Rende, Italy
| | - Nino Russo
- Dipartimento di Chimica e Tecnologie Chimiche, Università Della Calabria, Rende, Italy
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13
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Stolpovskaya EV, Trofimova NN, Babkin VA, Zhitov RG. A Study and Optimization of Complexation of Cobalt Ions with Dihydroquercetin in Aqueous Solutions. RUSSIAN JOURNAL OF BIOORGANIC CHEMISTRY 2021. [DOI: 10.1134/s1068162020070158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Cho S, Shin HM, Jeong Y, Kim S, Eom JH, Jung B, Kang SM, Cho WK. Plant-inspired quercetin thin films: universal coatings and their postfunctionalization for non-biofouling applications. NEW J CHEM 2021. [DOI: 10.1039/d1nj00593f] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
We developed quercetin surface chemistry that can be applied for various substrates and is able to postfunctionalize for hemocompatible coatings.
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Affiliation(s)
- Soojeong Cho
- Department of Chemistry
- Chungnam National University
- Daejeon 34134
- Korea
| | - Hyeon Min Shin
- Department of Chemistry
- Chungnam National University
- Daejeon 34134
- Korea
| | - Yeonwoo Jeong
- Department of Chemistry
- Chungbuk National University
- Cheongju
- Korea
| | - Sunhee Kim
- Department of Chemistry
- Chungnam National University
- Daejeon 34134
- Korea
| | - Ji Hwan Eom
- Department of Chemistry
- Chungnam National University
- Daejeon 34134
- Korea
| | - Byunghyuck Jung
- Department of Emerging Materials Science
- Daegu Gyeongbuk Institute of Science and Technology (DGIST)
- Daegu 42988
- Korea
| | - Sung Min Kang
- Department of Chemistry
- Chungbuk National University
- Cheongju
- Korea
| | - Woo Kyung Cho
- Department of Chemistry
- Chungnam National University
- Daejeon 34134
- Korea
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15
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Abstract
Quercetin (3,3',4',5,7-pentahydroxyflavone) is a naturally derived flavonoid that is commonly found in fruits and vegetables. There is mounting evidence to suggest that quercetin has potential anticancer effects and appears to interact synergistically when used in combination with approved chemotherapeutic agents such as irinotecan and cisplatin. Unfortunately, quercetin has shown limited clinical utility, partly due to low bioavailability related to its poor aqueous solutions (< 10 μg/mL). In this study, liposomal formulations of quercetin were developed by exploiting quercetin's ability to bind copper. Quercetin powder was added directly to pre-formed copper-containing liposomes (2-distearoyl-sn-glycero-3-phosphocholine (DSPC) and cholesterol (CHOL) (55:45 M ratio)). As a function of time and temperature, the formation of copper-quercetin was measured. Using this methodology, a final quercetin-to-lipid (mol:mol) ratio of 0.2 was achievable and solutions containing quercetin at concentrations of > 5 mg/mL were attained, representing at least a > 100-fold increase in apparent solubility. The resulting formulation was suitable for intravenous dosing with no overt toxicities when administered at doses of 50 mg/kg in mice. Pharmacokinetic studies demonstrated that the copper-quercetin formulations had an AUC0-24H of 8382.1 μg h/mL when administered to mice at 50 mg/kg. These studies suggested that quercetin (not copper-quercetin) dissociates from the liposomes after administration. The resulting formulation is suitable for further development and also serves as a proof-of-concept for formulating other flavonoids and flavonoid-like compounds. Given that quercetin exhibits an IC50 of >10 μM when tested against cancer cell lines, we believe that the utility of this novel quercetin formulation for cancer indications will ultimately be as a component of a combination product.
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16
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Srivastava T, Mishra SK, Tiwari OP, Sonkar AK, Tiwari KN, Kumar P, Dixit J, Kumar J, Singh AK, Verma P, Saini R, Singh A, Dwivedi AK. Synthesis, characterization, antimicrobial and cytotoxicity evaluation of quaternary cadmium (II)-quercetin complexes with 1,10-phenanthroline or 2,2’-bipyridine ligands. BIOTECHNOL BIOTEC EQ 2020. [DOI: 10.1080/13102818.2020.1806732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Affiliation(s)
- Tanu Srivastava
- Department of Chemistry, SHEAT College of Pharmacy, Varanasi, Uttar Pradesh, India
| | - Sunil Kumar Mishra
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Om Prakash Tiwari
- Department of Chemistry, Varanasi College of Pharmacy, Varanasi, Uttar Pradesh, India
| | - Avinash Kumar Sonkar
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Kavindra Nath Tiwari
- Department of Botany, MMV, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Pradeep Kumar
- Department of Botany, MMV, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Jyoti Dixit
- Department of Botany, MMV, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Jitendra Kumar
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Amit Kumar Singh
- Department of Pharmaceutical Engineering and Technology, Indian Institute of Technology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Pooja Verma
- Department of Botany, MMV, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Rajesh Saini
- Department of Botany, MMV, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Angaraj Singh
- Department of Ceramic Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Ashutosh Kumar Dwivedi
- Department of Ceramic Engineering, Indian Institute of Technology, Banaras Hindu University, Varanasi, Uttar Pradesh, India
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17
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Zima V, Radilová K, Kožíšek M, Albiñana CB, Karlukova E, Brynda J, Fanfrlík J, Flieger M, Hodek J, Weber J, Majer P, Konvalinka J, Machara A. Unraveling the anti-influenza effect of flavonoids: Experimental validation of luteolin and its congeners as potent influenza endonuclease inhibitors. Eur J Med Chem 2020; 208:112754. [PMID: 32883638 DOI: 10.1016/j.ejmech.2020.112754] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/20/2020] [Accepted: 08/09/2020] [Indexed: 01/27/2023]
Abstract
The biological effects of flavonoids on mammal cells are diverse, ranging from scavenging free radicals and anti-cancer activity to anti-influenza activity. Despite appreciable effort to understand the anti-influenza activity of flavonoids, there is no clear consensus about their precise mode-of-action at a cellular level. Here, we report the development and validation of a screening assay based on AlphaScreen technology and illustrate its application for determination of the inhibitory potency of a large set of polyols against PA N-terminal domain (PA-Nter) of influenza RNA-dependent RNA polymerase featuring endonuclease activity. The most potent inhibitors we identified were luteolin with an IC50 of 72 ± 2 nM and its 8-C-glucoside orientin with an IC50 of 43 ± 2 nM. Submicromolar inhibitors were also evaluated by an in vitro endonuclease activity assay using single-stranded DNA, and the results were in full agreement with data from the competitive AlphaScreen assay. Using X-ray crystallography, we analyzed structures of the PA-Nter in complex with luteolin at 2.0 Å resolution and quambalarine B at 2.5 Å resolution, which clearly revealed the binding pose of these polyols coordinated to two manganese ions in the endonuclease active site. Using two distinct assays along with the structural work, we have presumably identified and characterized the molecular mode-of-action of flavonoids in influenza-infected cells.
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Affiliation(s)
- Václav Zima
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 00, Prague 2, Czech Republic; Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Kateřina Radilová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic; First Faculty of Medicine, Charles University, Kateřinská 1660, 121 08, Prague 2, Czech Republic
| | - Milan Kožíšek
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic.
| | - Carlos Berenguer Albiñana
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 00, Prague 2, Czech Republic; Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Elena Karlukova
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Jiří Brynda
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic; Institute of Molecular Genetics of the Czech Academy of Sciences, Vídeňská 1083, 140 00, Prague 4, Czech Republic
| | - Jindřich Fanfrlík
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Miroslav Flieger
- Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, 140 00, Prague 4, Czech Republic
| | - Jan Hodek
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Jan Weber
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Pavel Majer
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic
| | - Jan Konvalinka
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic; Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, 128 00, Prague 2, Czech Republic
| | - Aleš Machara
- Department of Organic Chemistry, Faculty of Science, Charles University, Hlavova 8, 128 00, Prague 2, Czech Republic; Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Gilead Sciences and IOCB Research Center, Flemingovo n. 2, 166 10, Prague 6, Czech Republic.
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18
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Altunay N, Katin KP. Ultrasonic-assisted supramolecular solvent liquid-liquid microextraction for determination of manganese and zinc at trace levels in vegetables: Experimental and theoretical studies. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113192] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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19
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Hermanto FE, Soewondo A, Tsuboi H, Ibrahim M, Rifa'i M. The hepatoprotective effect of Cheral as anti-oxidant and anti-inflammation on mice (Mus musculus) with breast cancer. JOURNAL OF HERBMED PHARMACOLOGY 2020. [DOI: 10.34172/jhp.2020.20] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Introduction: Recent studies have reported that breast cancer may affect the physiology of other organs, including oxidative stress in the liver. On the other hand, some agents such as white turmeric (Curcuma longa) and Meniran (Phyllanthus niruri) seem to maintain redox stability and immunomodulation. Both of them are combined into Cheral potion. This study was aimed to investigate the Cheral efficacy in modulating oxidative stress based on Nuclear factor erythroid 2-related factor 2 (Nrf2), HEME OXIGenase (HO), and superoxide dismutase (SOD) levels as well as pro-inflammatory cytokines under breast cancer condition in vivo. Methods: Nrf2, HO, and SOD from hepatocytes, and tumor necrosis factor-α (TNF-α) and interferon-γ (IFN-γ) from splenocytes were measured by flow cytometry after 14 days of Cheral administration. Results: The results showed that mice model for breast cancer underwent oxidative stress denoted by high levels of HO, and SOD accompanied by increased levels of TNF-α and IFN-γ in the cancer group compared to normal healthy group (P<0.05). In contrast, Cheral treatment was able to modulate redox balance by declining levels of HO, SOD, TNF-α, and IFN-γ, but not Nrf2, compared to cancer group (P<0.05). Conclusion: The results showed that breast cancer could alter the host’s physiology, including liver oxidative stress. The levels of TNF-α and IFN-γ might contribute to regulation of redox balance in the liver. However, Cheral has potency as an alternative therapeutic agent to reduce oxidative stress in the liver under breast cancer condition.
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Affiliation(s)
- Feri Eko Hermanto
- Biology Department, Faculty of Mathematics and Natural Sciences, Brawijaya University, Jl. Veteran Malang 65145, East Java, Indonesia
| | - Aris Soewondo
- Biology Department, Faculty of Mathematics and Natural Sciences, Brawijaya University, Jl. Veteran Malang 65145, East Java, Indonesia
| | - Hideo Tsuboi
- Department of Immunology, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya 466-8550, Japan
| | - Mansur Ibrahim
- Pancasakti University, Makasar 90132, South Sulawesi, Indonesia
| | - Muhaimin Rifa'i
- Biology Department, Faculty of Mathematics and Natural Sciences, Brawijaya University, Jl. Veteran Malang 65145, East Java, Indonesia
- Biosystem Study Center, Brawijaya University, Jl. Veteran Malang 65145, East Java, Indonesia
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20
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Li X, Wang T, Liu J, Liu Y, Zhang J, Lin J, Zhao Z, Chen D. Effect and mechanism of wedelolactone as antioxidant-coumestan on OH-treated mesenchymal stem cells. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2017.03.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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21
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Alhafez M, Kheder F, Aljoubbeh M. Synthesis, characterization and antioxidant activity of EGCG complexes with copper and zinc ions. J COORD CHEM 2019. [DOI: 10.1080/00958972.2019.1638510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Maysoon Alhafez
- Department of Chemistry, Faculty of Science, Damascus University, Damascus, Syria
| | - Fadi Kheder
- Department of Chemistry, Faculty of Science, Damascus University, Damascus, Syria
| | - Malak Aljoubbeh
- Department of Chemistry, Faculty of Science, Damascus University, Damascus, Syria
- Syrian Private University, Damascus, Syria
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22
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ESI-TOF MS analysis of complexes formed between quercetin and five metal ions in hot water and a study into their DNA cleavage activity. J Inorg Biochem 2019; 195:13-19. [PMID: 30877879 DOI: 10.1016/j.jinorgbio.2019.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/05/2019] [Accepted: 03/03/2019] [Indexed: 11/21/2022]
Abstract
Quercetin is a flavonoid compound widely found in vegetables, fruits, and medicinal plants. It has carbonyl and phenolic hydroxyl groups in its structure that can easily form complexes with metal ions. In this study, we reacted quercetin in water at 95 °C with five metal trace elements commonly found in plants, namely calcium, magnesium, zinc, iron(III), and copper. Each supernatant was then examined by electrospray ionization-time-of-flight mass spectrometry (ESI-TOF MS). The results showed that quercetin can form complexes with Ca2+, Mg2+, Zn2+, and Cu2+ in ratios of 2:1, 3:1, and 3:2. Interestingly, after reaction with Fe3+ in water at 95 °C, not only can quercetin‑iron(III) complexes be formed in ratios of 2:1 and 3:1, but small amounts of quercetin‑iron(II) complexes can also be formed in the same ratios. Furthermore, DNA cleavage experiments showed that when acting alone, quercetin and Cu2+ have weak or no cleavage effects on DNA, but the complex formed after reaction in hot water cleaves DNA in a time- and concentration-dependent manner. These results indicate that complexes may form between quercetin and a variety of metal trace elements in a water decoction of plants, and that these metal complexes may be the material basis for the health-promoting and therapeutic effects of edible or medicinal plants.
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Park HR, Kim BG, Kim SJ, Yoon JA, Bark KM. Spectroscopic Properties of the Quercetin-Divalent Metal Complexes in Hydro-Organic Mixed Solvent. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11532] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Hyoung-Ryun Park
- Department of Chemistry and Research Institute of Basic Science; Chonnam National University; Gwangju 61186 Korea
| | - Bong-Gon Kim
- Department of Chemical Education and Research Institute of Natural Science; Gyeongsang National University; Chinju 52828 Korea
| | - Su Jin Kim
- Department of Chemical Education; Gyeongsang National University; Chinju 52828 Korea
| | - Jin Ah Yoon
- Department of Chemical Education; Gyeongsang National University; Chinju 52828 Korea
| | - Ki-Min Bark
- Department of Chemical Education and Research Institute of Life Science; Gyeongsang National University; Chinju 52828 Korea
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25
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Łodyga-Chruscińska E, Pilo M, Zucca A, Garribba E, Klewicka E, Rowińska-Żyrek M, Symonowicz M, Chrusciński L, Cheshchevik VT. Physicochemical, antioxidant, DNA cleaving properties and antimicrobial activity of fisetin-copper chelates. J Inorg Biochem 2018; 180:101-118. [DOI: 10.1016/j.jinorgbio.2017.12.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 11/22/2017] [Accepted: 12/05/2017] [Indexed: 10/18/2022]
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26
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Zhao G, Wang H, Liu G. Sensitive determination of trace Cd(ii) and Pb(ii) in soil by an improved stripping voltammetry method using two different in situ plated bismuth-film electrodes based on a novel electrochemical measurement system. RSC Adv 2018; 8:5079-5089. [PMID: 35542410 PMCID: PMC9078133 DOI: 10.1039/c7ra12767g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2017] [Accepted: 01/23/2018] [Indexed: 12/11/2022] Open
Abstract
In this study, a simple but effective electrochemical method was developed to minimize the interference from real soil samples and increase the sensitivity of Pb(ii) and Cd(ii) detection by square-wave anodic stripping voltammetry (SWASV) using a novel electrochemical measurement system, which can be used for the on-site determination of trace Cd(ii) and Pb(ii) in real soil samples. The method involved performing SWASV following double deposition and stripping steps at two in situ plated bismuth-film electrodes with drastically different surface properties. Pb(ii) and Cd(ii) were first deposited on an in situ plated bismuth-film graphite carbon paste electrode (Bi/GCPE). When the first deposition was finished, the GCPE was moved to a micro-electrolytic cell to perform the first stripping step. The following measurements were performed with the other deposition and stripping steps using a highly sensitive in situ plated bismuth-film multiwalled carbon nanotube–Nafion composite modified glassy carbon electrode (Bi/MWCNT–Nafion/GCE) as the working electrode. Pb(ii), Cd(ii) and Bi(iii) stripped from the GCPE in the micro-electrolytic cell were partially deposited on the MWCNT–Nafion/GCE, and the stripping current signals were obtained from their oxidation during the second stripping step. Considering the small volume of the micro-electrolytic cell, the concentrations of Cd(ii) and Pb(ii) were drastically higher than those in the bulk solution, and therefore, the detection limits were reduced. Under the optimized conditions, the concentrations in the linear range spanned from 1.0 to 45.0 μg L−1 for both Pb(ii) and Cd(ii), with a detection limit of 0.03 μg L−1 for Pb(ii) and 0.02 μg L−1 for Cd(ii) (S/N = 3). Finally, analyses of real samples were performed to detect trace levels of Pb(ii) and Cd(ii) in soil with satisfactory results. A double-stripping voltammetry method was designed and developed to improve the sensitivity and anti-interference ability for detection of heavy metals.![]()
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Affiliation(s)
- Guo Zhao
- Key Lab of Modern Precision Agriculture System Integration Research
- Ministry of Education of China
- China Agricultural University
- Beijing 100083
- P. R. China
| | - Hui Wang
- Key Lab of Modern Precision Agriculture System Integration Research
- Ministry of Education of China
- China Agricultural University
- Beijing 100083
- P. R. China
| | - Gang Liu
- Key Lab of Modern Precision Agriculture System Integration Research
- Ministry of Education of China
- China Agricultural University
- Beijing 100083
- P. R. China
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27
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Jomova K, Lawson M, Drostinova L, Lauro P, Poprac P, Brezova V, Michalik M, Lukes V, Valko M. Protective role of quercetin against copper(II)-induced oxidative stress: A spectroscopic, theoretical and DNA damage study. Food Chem Toxicol 2017; 110:340-350. [PMID: 29107026 DOI: 10.1016/j.fct.2017.10.042] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 10/24/2017] [Accepted: 10/25/2017] [Indexed: 01/27/2023]
Abstract
The radical scavenging and metal chelating properties of flavonoids indicate that they may play a protective role in diseases with perturbed metal homeostasis such as Alzheimer's disease. In this work we investigated the effect of the coordination of quercetin to copper(II) in view of the formation of ROS in Cu-catalyzed Fenton reaction. ABTS and DPPH assays confirmed that the copper(II)-quercetin complex exhibits a stronger radical scavenging activity than does quercetin alone. EPR spin trapping experiments have shown that chelation of quercetin to copper significantly suppressed the formation of hydroxyl radicals in the Cu(II)-Fenton reaction. DNA damage experiments revealed a protective effect for quercetin, but only at higher stoichiometric ratios of quercetin relative to copper. DNA protective effect of quercetin against ROS attack was described by two mechanisms. The first mechanism lies in suppressed formation of ROS due to the decreased catalytic action of copper in the Fenton reaction, as a consequence of its chelation and direct scavenging of ROS by free quercetin. Since the Cu-quercetin complex intercalates into DNA, the second mechanism was attributed to a suppressed intercalating ability of the Cu-quercetin complex due to the mildly intercalating free quercetin into DNA, thus creating a protective wall against stronger intercalators.
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Affiliation(s)
- Klaudia Jomova
- Department of Chemistry, Faculty of Natural Sciences, Constantine the Philosopher University, 949 74 Nitra, Slovakia
| | - Michael Lawson
- Department of Chemistry, Faculty of Natural Sciences, Constantine the Philosopher University, 949 74 Nitra, Slovakia
| | - Lenka Drostinova
- Department of Chemistry, Faculty of Natural Sciences, Constantine the Philosopher University, 949 74 Nitra, Slovakia
| | - Peter Lauro
- Department of Chemistry, Faculty of Natural Sciences, Constantine the Philosopher University, 949 74 Nitra, Slovakia
| | - Patrik Poprac
- Faculty of Chemical and Food Technology, Slovak University of Technology, 812 37 Bratislava, Slovakia
| | - Vlasta Brezova
- Faculty of Chemical and Food Technology, Slovak University of Technology, 812 37 Bratislava, Slovakia
| | - Martin Michalik
- Faculty of Chemical and Food Technology, Slovak University of Technology, 812 37 Bratislava, Slovakia
| | - Vladimir Lukes
- Faculty of Chemical and Food Technology, Slovak University of Technology, 812 37 Bratislava, Slovakia
| | - Marian Valko
- Faculty of Chemical and Food Technology, Slovak University of Technology, 812 37 Bratislava, Slovakia.
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Samsonowicz M, Regulska E. Spectroscopic study of molecular structure, antioxidant activity and biological effects of metal hydroxyflavonol complexes. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 173:757-771. [PMID: 27792987 DOI: 10.1016/j.saa.2016.10.031] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 10/11/2016] [Accepted: 10/18/2016] [Indexed: 05/05/2023]
Abstract
Flavonols with varied hydroxyl substitution can act as strong antioxidants. Thanks to their ability to chelate metals as well as to donate hydrogen atoms they have capacity to scavenge free radicals. Their metal complexes are often more active in comparison with free ligands. They exhibit interesting biological properties, e.g. anticancer, antiphlogistic and antibacterial. The relationship between molecular structure and their biological properties was intensively studied using spectroscopic methods (UV-Vis, IR, Raman, NMR, ESI-MS). The aim of this paper is review on spectroscopic analyses of molecular structure and biological activity of hydroxyflavonol metal complexes.
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Affiliation(s)
- Mariola Samsonowicz
- Bialystok University of Technology, Division of Chemistry, Wiejska 45E, 15-351 Bialystok, Poland.
| | - Ewa Regulska
- Bialystok University of Technology, Division of Chemistry, Wiejska 45E, 15-351 Bialystok, Poland
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29
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Protonation equilibria studies of quercetin in aqueous solutions of ethanol and dimethyl sulphoxide. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.10.108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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30
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Thermodynamic Studies on Protonation Constant of Quercetin at Different Ionic Strengths. J SOLUTION CHEM 2016. [DOI: 10.1007/s10953-016-0506-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Quercetin-Iron Complex: Synthesis, Characterization, Antioxidant, DNA Binding, DNA Cleavage, and Antibacterial Activity Studies. J Fluoresc 2016; 26:2023-2031. [PMID: 27481501 DOI: 10.1007/s10895-016-1896-y] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 07/26/2016] [Indexed: 10/21/2022]
Abstract
Quercetin-iron (II) complex was synthesized and characterized by elemental analysis, ultraviolet-visible spectrophotometry, fourier transform infrared spectroscopy, mass spectrometry, proton nuclear magnetic resonance spectroscopy, thermogravimetry and differential scanning calorimetry, scanning electron micrography and molar conductivity. The low molar conductivity value investigates the non-electrolyte nature of the complex. The elemental analysis and other physical and spectroscopic methods reveal the 1:2 stoichiometric ratio (metal:ligand) of the complex. Antioxidant study of the quercetin and its metal complex against 2, 2-di-phenyl-1-picryl hydrazyl radical showed that the complex has much more radical scavenging activity than free quercetin. The interaction of quercetin-iron (II) complex with DNA was determined using ultraviolet visible spectra, fluorescence spectra and agarose gel electrophoresis. The results showed that quercetin-iron (II) complex can intercalate moderately with DNA, quench a strong intercalator ethidium bromide and compete for the intercalative binding sites. The complex showed significant cleavage of pBR 322 DNA from supercoiled form to nicked circular form and these cleavage effects were dose-dependent. Moreover, the mechanism of DNA cleavage indicated that it was an oxidative cleavage pathway. These results revealed the potential nuclease activity of complex to cleave DNA. In addition, antibacterial activity of complex on E.coli and S. aureus was also investigated. The results showed that complex has higher antibacterial activity than ligand.
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32
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Griffiths K, Aggarwal BB, Singh RB, Buttar HS, Wilson D, De Meester F. Food Antioxidants and Their Anti-Inflammatory Properties: A Potential Role in Cardiovascular Diseases and Cancer Prevention. Diseases 2016; 4:E28. [PMID: 28933408 PMCID: PMC5456284 DOI: 10.3390/diseases4030028] [Citation(s) in RCA: 125] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2016] [Revised: 07/18/2016] [Accepted: 07/18/2016] [Indexed: 12/24/2022] Open
Abstract
Mediterranean-style diets caused a significant decline in cardiovascular diseases (CVDs) in early landmark studies. The effect of a traditional Mediterranean diet on lipoprotein oxidation showed that there was a significant reduction in oxidative stress in the intervention group (Mediterranean diet + Virgin Olive Oil) compared to the low-fat diet group. Conversely, the increase in oxidative stress causing inflammation is a unifying hypothesis for predisposing people to atherosclerosis, carcinogenesis, and osteoporosis. The impact of antioxidants and anti-inflammatory agents on cancer and cardiovascular disease, and the interventive mechanisms for the inhibition of proliferation, inflammation, invasion, metastasis, and activation of apoptosis were explored. Following the Great Oxygen Event some 2.3 billion years ago, organisms have needed antioxidants to survive. Natural products in food preservatives are preferable to synthetic compounds due to their lower volatility and stability and generally higher antioxidant potential. Free radicals, reactive oxygen species, antioxidants, pro-oxidants and inflammation are described with examples of free radical damage based on the hydroxyl, nitric oxide and superoxide radicals. Flavonoid antioxidants with 2- or 3-phenylchroman structures such as quercetin, kaempferol, myricetin, apigenin, and luteolin, constituents of fruits, vegetables, tea, and wine, which may reduce coronary disease and cancer, are described. The protective effect of flavonoids on the DNA damage caused by hydroxyl radicals through chelation is an important mechanism, though the converse may be possible, e.g., quercetin. The antioxidant properties of carotenoids, which are dietary natural pigments, have been studied in relation to breast cancer risk and an inverse association was found with plasma concentrations: higher levels mean lower risk. The manipulation of primary and secondary human metabolomes derived especially from existing or transformed gut microbiota was explored as a possible alternative to single-agent dietary interventions for cancer and cardiovascular disease. Sustained oxidative stress leading to inflammation and thence to possibly to cancer and cardiovascular disease is described for spices and herbs, using curcumin as an example of an intervention, based on activation of transcription factors which suggest that oxidative stress, chronic inflammation, and cancer are closely linked.
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Affiliation(s)
- Keith Griffiths
- Emeritus Professor of Cancer Research, University of Wales College of Medicine, Laurel Cottage, Castleton, Cardiff CF3 2UR, UK.
| | | | - Ram B Singh
- Halberg Hospital and Research Institute, Civil Lines, Moradabad, UP 244001, India.
| | - Harpal S Buttar
- Department of Pathology & Laboratory Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5 , Canada.
| | - Douglas Wilson
- School Medicine Pharmacy and Health, Durham University, Durham TS17 6BH, UK.
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Li X, Liu J, Lin J, Wang T, Huang J, Lin Y, Chen D. Protective Effects of Dihydromyricetin against •OH-Induced Mesenchymal Stem Cells Damage and Mechanistic Chemistry. Molecules 2016; 21:E604. [PMID: 27171068 PMCID: PMC6274564 DOI: 10.3390/molecules21050604] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 04/22/2016] [Accepted: 04/28/2016] [Indexed: 12/04/2022] Open
Abstract
As a natural flavonoid in Ampelopsis grossedentata, dihydromyricetin (DHM, 2R,3R-3,5,7,3',4',5'-hexahydroxy-2,3-dihydroflavonol) was observed to increase the viability of •OH-treated mesenchymal stem cells using a MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl] assay and flow cytometry analysis. This protective effect indicates DHM may be a beneficial agent for cell transplantation therapy. Mechanistic chemistry studies indicated that compared with myricetin, DHM was less effective at ABTS⁺• (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid radical) scavenging and reducing Cu(2+), and had higher •O₂(-) and DPPH• (1,1-diphenyl-2-picrylhydrazyl radical) scavenging activities. Additionally, DHM could also chelate Fe(2+) to give an absorption maximum at 589 nm. Hence, such protective effect of DHM may arise from its antioxidant activities which are thought to occur via direct radical-scavenging and Fe(2+)-chelation. Direct radical-scavenging involves an electron transfer (ET) pathway. The hydrogenation of the 2,3-double bond is hypothesized to reduce the ET process by blocking the formation of a larger π-π conjugative system. The glycosidation of the 3-OH in myricitrin is assumed to sterically hinder atom transfer in the •O₂(-) and DPPH• radical-scavenging processes. In DHM, the Fe(2+)-chelating effect can actually be attributed to the 5,3',4',5'-OH and 4-C=O groups, and the 3-OH group itself can neither scavenge radicals nor chelate metal.
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Affiliation(s)
- Xican Li
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Jingjing Liu
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Jian Lin
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Tingting Wang
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Jieyuan Huang
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Yongqiang Lin
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
| | - Dongfeng Chen
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
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Ghosh N, Chakraborty T, Mallick S, Mana S, Singha D, Ghosh B, Roy S. Synthesis, characterization and study of antioxidant activity of quercetin-magnesium complex. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 151:807-813. [PMID: 26172468 DOI: 10.1016/j.saa.2015.07.050] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Revised: 07/07/2015] [Accepted: 07/08/2015] [Indexed: 06/04/2023]
Abstract
Quercetin (3,3',4',5,7-pentahydroxyflavone) one of the most abundant dietary flavonoids, has been investigated in the presence of magnesium (II) in methanol. The complex formation between quercetin and magnesium (II) was examined under UV-visible, Infra-red and (1)H NMR spectroscopic techniques. The spectroscopic data denoted that quercetin can reacts with magnesium cation (Mg(+2)) through the chelation site in the quercetin molecule. The free radical antioxidant activity of the complex with respect to the parent molecule was evaluated using 1,1-diphenyl-2-picrylhydrazyl (DPPH) method. It was observed that the free radical scavenging activity of quercetin was increased after complexation of magnesium (Mg(+2)) cation.
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Affiliation(s)
- Nilanjan Ghosh
- NSHM Knowledge Campus Kolkata, Group of Institutions, 124-BL Saha Road, Kolkata, West Bengal 700053, India
| | - Tania Chakraborty
- NSHM Knowledge Campus Kolkata, Group of Institutions, 124-BL Saha Road, Kolkata, West Bengal 700053, India
| | - Sougata Mallick
- NSHM Knowledge Campus Kolkata, Group of Institutions, 124-BL Saha Road, Kolkata, West Bengal 700053, India
| | - Supriya Mana
- NSHM Knowledge Campus Kolkata, Group of Institutions, 124-BL Saha Road, Kolkata, West Bengal 700053, India
| | - Deepanwita Singha
- Nightingale Diagnostic & Medicare Centre Pvt Ltd., 11, Shakespeare Sarani, Kolkata, West Bengal 700071, India
| | - Balaram Ghosh
- Midnapore Medical College and Hospital, Vidyasagar Road, Medinipur, West Bengal 721101, India
| | - Souvik Roy
- NSHM Knowledge Campus Kolkata, Group of Institutions, 124-BL Saha Road, Kolkata, West Bengal 700053, India.
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Liu Y, Guo M. Studies on transition metal-quercetin complexes using electrospray ionization tandem mass spectrometry. Molecules 2015; 20:8583-94. [PMID: 25985359 PMCID: PMC6272614 DOI: 10.3390/molecules20058583] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 05/03/2015] [Accepted: 05/05/2015] [Indexed: 11/16/2022] Open
Abstract
To systematically study the effects of the number of d electrons of the first transition metal ions (Fe, Co, Ni, Cu and Zn) on the formation and stability of metal flavonoid complexes, we took the quercetin/M2+ complex as a model system to investigate the structures and properties of these complexes. Based on considerable structural information obtained through ESI-MSn, all of the first transition metal ions (Fe2+, Co2+, Ni2+, Cu2+ and Zn2+) were found to form different complexes with quercetin, while with the number of chelating flavonoids decreasing along with the reduction of the metal ionic radius. Quercetin forms different complexes with the above metal divalent ions through its 5-OH and 4-carbonyl groups; the complex stability is highly dependent on both the metallic ion and the flavonoid chelator itself. As for the central ion (M2+), when chelated with quercetin to form the complex, the stability of the complex decreased in the following order: Cu2+ > Ni2+ > Co2+ > Fe2+ > Zn2+. With flavonoid: metal stoichiometries at 2:1, the complexes formed between quercetin and metal ions (Fe2+, Ni2+, Co2+ and Zn2+) have the similar fragmentation mechanism, while Cu2+ displayed different fragmentation mechanism due to the concurrent oxidation.
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Affiliation(s)
- Yuanzhen Liu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of Chinese Academy of Sciences, Wuhan 430074, China.
| | - Mingquan Guo
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden of Chinese Academy of Sciences, Wuhan 430074, China.
- The Keck School of Medicine, University of Southern California, Los Angeles, CA 90089, USA.
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Kasprzak MM, Erxleben A, Ochocki J. Properties and applications of flavonoid metal complexes. RSC Adv 2015. [DOI: 10.1039/c5ra05069c] [Citation(s) in RCA: 225] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Flavonoid metal complexes have a wide spectrum of activities as well as potential and actual applications.
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Affiliation(s)
- Maria M. Kasprzak
- Department of Bioinorganic Chemistry
- Medical University of Lodz
- Lodz
- Poland
| | - Andrea Erxleben
- School of Chemistry
- National University of Ireland
- Galway
- Ireland
| | - Justyn Ochocki
- Department of Bioinorganic Chemistry
- Medical University of Lodz
- Lodz
- Poland
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Zou Y, Yan F, Zheng T, Shi D, Sun F, Yang N, Chen L. Highly luminescent organosilane-functionalized carbon dots as a nanosensor for sensitive and selective detection of quercetin in aqueous solution. Talanta 2014; 135:145-8. [PMID: 25640138 DOI: 10.1016/j.talanta.2014.12.029] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 12/19/2014] [Accepted: 12/20/2014] [Indexed: 10/24/2022]
Abstract
The organosilane-functionalized carbon dots (SiCDs) were synthesized using citric acid with N-(b-aminoethyl)-g-aminopropyl methyldimethoxy silane (AEAPMS). The as-synthesized SiCDs were characterized by IR, TEM, XPS, NMR and fluorescence. The SiCDs showed a strong emission at 455 nm with excitation at 365 nm. The SiCDs exhibited analytical potential as sensing probes for quercetin (QCT) determination. pH effect, temperature effect, interferences, and analytical performance of the method were investigated. It suggested that SiCDs exhibited high sensitivity and selectivity toward QCT: the linear ranges of SiCDs were estimated to be 0-40 μM while the limit of detection (LOD) was calculated to be 79 nM.
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Affiliation(s)
- Yu Zou
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Fanyong Yan
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China.
| | - Tancheng Zheng
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Dechao Shi
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Fengzhan Sun
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Ning Yang
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China
| | - Li Chen
- State Key Laboratory of Hollow Fiber Membrane Materials and Processes, Key Lab of Fiber Modification & Functional Fiber of Tianjin, Tianjin Polytechnic University, Tianjin 300387, PR China
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38
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Syntheses, crystal structures and antioxidant study of Zn(II) complexes with morin-5′-sulfonic acid (MSA). J Inorg Biochem 2014; 141:180-187. [DOI: 10.1016/j.jinorgbio.2014.09.005] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2014] [Revised: 09/09/2014] [Accepted: 09/09/2014] [Indexed: 11/20/2022]
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Roy S, Mallick S, Chakraborty T, Ghosh N, Singh AK, Manna S, Majumdar S. Synthesis, characterisation and antioxidant activity of luteolin-vanadium(II) complex. Food Chem 2014; 173:1172-8. [PMID: 25466140 DOI: 10.1016/j.foodchem.2014.10.141] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2013] [Revised: 09/11/2014] [Accepted: 10/26/2014] [Indexed: 11/16/2022]
Abstract
The complex formation between luteolin (L) and vanadium(IV) oxide sulphate monohydrate (VOSO4·H2O) was examined under UV-visible, infra-red spectroscopy, mass spectroscopy and NMR techniques. The spectroscopic data indicated that luteolin reacts with vanadium oxide cation (VO(+2)) through 4-carbonyl-5-hydroxy chelation site in the two luteolin molecule. The free radical antioxidant activity of the complex with respect to the parent molecule was evaluated using 1,1-diphenyl-2-picrylhydrazyl (DPPH), ferric reducing antioxidant power (FRAP) and 2,2'-azinobis 3-ethylbenzothiazoline-6-sulphonic acid diammonium salt (ABTS) methods. It was observed that the free radical scavenging activity and ferric ion reducing potential of luteolin was increased after the formation of complex with vanadium oxide (VO(+2)) cation.
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Affiliation(s)
- Souvik Roy
- Department of Pharmaceutical Technology, NSHM Knowledge Campus, 124 B.L. Saha Road, Kolkata 700053, West Bengal, India.
| | - Sougata Mallick
- Department of Pharmaceutical Technology, NSHM Knowledge Campus, 124 B.L. Saha Road, Kolkata 700053, West Bengal, India
| | - Tania Chakraborty
- Department of Pharmaceutical Technology, NSHM Knowledge Campus, 124 B.L. Saha Road, Kolkata 700053, West Bengal, India
| | - Nilanjan Ghosh
- Department of Pharmaceutical Technology, NSHM Knowledge Campus, 124 B.L. Saha Road, Kolkata 700053, West Bengal, India
| | - Amit Kumar Singh
- Department of Pharmaceutical Technology, NSHM Knowledge Campus, 124 B.L. Saha Road, Kolkata 700053, West Bengal, India
| | - Subhadip Manna
- Department of Pharmaceutical Technology, NSHM Knowledge Campus, 124 B.L. Saha Road, Kolkata 700053, West Bengal, India
| | - Sumana Majumdar
- Department of Pharmaceutical Technology, NSHM Knowledge Campus, 124 B.L. Saha Road, Kolkata 700053, West Bengal, India
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40
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Conrad AO, Rodriguez-Saona LE, McPherson BA, Wood DL, Bonello P. Identification of Quercus agrifolia (coast live oak) resistant to the invasive pathogen Phytophthora ramorum in native stands using Fourier-transform infrared (FT-IR) spectroscopy. FRONTIERS IN PLANT SCIENCE 2014; 5:521. [PMID: 25352852 PMCID: PMC4196480 DOI: 10.3389/fpls.2014.00521] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 09/15/2014] [Indexed: 05/10/2023]
Abstract
Over the last two decades coast live oak (CLO) dominance in many California coastal ecosystems has been threatened by the alien invasive pathogen Phytophthora ramorum, the causal agent of sudden oak death. In spite of high infection and mortality rates in some areas, the presence of apparently resistant trees has been observed, including trees that become infected but recover over time. However, identifying resistant trees based on recovery alone can take many years. The objective of this study was to determine if Fourier-transform infrared (FT-IR) spectroscopy, a chemical fingerprinting technique, can be used to identify CLO resistant to P. ramorum prior to infection. Soft independent modeling of class analogy identified spectral regions that differed between resistant and susceptible trees. Regions most useful for discrimination were associated with carbonyl group vibrations. Additionally, concentrations of two putative phenolic biomarkers of resistance were predicted using partial least squares regression; >99% of the variation was explained by this analysis. This study demonstrates that chemical fingerprinting can be used to identify resistance in a natural population of forest trees prior to infection with a pathogen. FT-IR spectroscopy may be a useful approach for managing forests impacted by sudden oak death, as well as in other situations where emerging or existing forest pests and diseases are of concern.
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Affiliation(s)
- Anna O. Conrad
- Department of Plant Pathology, The Ohio State UniversityColumbus, OH, USA
| | | | - Brice A. McPherson
- Department of Environmental Science, Policy, and Management, University of CaliforniaBerkeley, CA, USA
| | - David L. Wood
- Department of Environmental Science, Policy, and Management, University of CaliforniaBerkeley, CA, USA
| | - Pierluigi Bonello
- Department of Plant Pathology, The Ohio State UniversityColumbus, OH, USA
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41
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42
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Electrochemical study of the increased antioxidant capacity of flavonoids through complexation with iron(II) ions. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.07.046] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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43
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Jabeen E, Janjua NK, Hameed S. β-Cyclodextrin assisted solubilization of Cu and Cr complexes of flavonoids in aqueous medium: a DNA-interaction study. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 128:191-6. [PMID: 24667424 DOI: 10.1016/j.saa.2014.02.132] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/01/2014] [Revised: 02/03/2014] [Accepted: 02/19/2014] [Indexed: 05/21/2023]
Abstract
Cu and Cr complexes of three flavonoids (morin, quercetin and 6-hydroxyflavone) were synthesized and included in beta-cyclodextrin (βCD) with the objective of improving their pharmacokinetic profiles. Then binding with ds.DNA was studied to monitor their interactive tendencies at physiological conditions. The binding constants and other thermodynamic data from UV-vis spectroscopy and cyclic voltammetry revealed Cr-flavonoid-βCD to interact with ds.DNA at pH-7.4 through electrostatic mode of binding while Cu-flavonoid-βCD can intercalate into DNA. The strong binding propensity of Cu-flavonoid-βCD with ds.DNA encourages their application as anticancerous agent.
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Affiliation(s)
- Erum Jabeen
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | | | - Shahid Hameed
- Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
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44
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Li X, Gao Y, Li F, Liang A, Xu Z, Bai Y, Mai W, Han L, Chen D. Maclurin protects against hydroxyl radical-induced damages to mesenchymal stem cells: antioxidant evaluation and mechanistic insight. Chem Biol Interact 2014; 219:221-8. [PMID: 24973644 DOI: 10.1016/j.cbi.2014.06.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 05/30/2014] [Accepted: 06/16/2014] [Indexed: 11/26/2022]
Abstract
Maclurin, an exceptional member of phytophenol family, was found to effectively protect against mesenchymal stem cells (MSCs) oxidative damage induced by hydroxyl radical (OH) at 62.1-310.5 μM. Antioxidant assays indicated that maclurin could efficiently protect DNA from OH-induced damage at 114.6-382.2 μM, and scavenge OH, DPPH (1,1-diphenyl-2-picrylhydrazyl radical), ABTS(+) (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid radical), and bind Cu(2+) (IC50 values were respectively 122.87 ± 10.14, 10.15 ± 0.85, 0.97 ± 0.07, and 133.95 ± 11.92 μM). HPLC-DAD and HPLC-ESI-MS/MS analyses of the end-product of maclurin reaction with DPPH clearly suggested that maclurin (m/z = 261.12 [M-H](-)) donated two hydrogen atoms to DPPH (m/z = 394.06 [M](+)) to form ortho-benzoquinone moiety (λmax = 364 nm; m/z = 259.06 [M-H](-), loss of m/z = 28) and DPPH2 molecule (m/z = 395.03, 396.01), via hydrogen atom transfer (HAT) or sequential electron (e) proton transfer (SEPT), not radical adduct formation (RAF) mechanisms. Therefore, we concluded that: (i) maclurin can effectively protect against OH-induced damages to DNA and MSCs, thereby it may have a therapeutic potential in prevention of many diseases or MSCs transplantation; (ii) a possible mechanism for maclurin to protect against oxidative damages is OH radical-scavenging; (iii) maclurin scavenges OH possibly through metal-chelating, and direct radical-scavenging which is mainly via HAT or SEPT mechanisms; and (iv) the protective and antioxidant effects of maclurin can be primarily attributed to ortho-dihydroxyl groups, and ultimately to the relative stability of the ortho-benzoquinone form.
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Affiliation(s)
- Xican Li
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China. http://www.researchgate.net/profile/Xican_Li
| | - Yaoxiang Gao
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Fei Li
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Aifeng Liang
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Zhiming Xu
- Third School of Clinical Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Ye Bai
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Wenqiong Mai
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Lu Han
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou 510006, China
| | - Dongfeng Chen
- School of Basic Medical Science, Guangzhou University of Chinese Medicine, Guangzhou 510006, China.
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45
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Furia E, Marino T, Russo N. Insights into the coordination mode of quercetin with the Al(III) ion from a combined experimental and theoretical study. Dalton Trans 2014; 43:7269-74. [PMID: 24686751 DOI: 10.1039/c4dt00212a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Combining potentiometric, spectroscopic and theoretical DFT computations we have studied the formation of the Al(iii)-quercetin complex in ethanol solution. The possible complexation sites have been considered on the basis of all the experimental and theoretical tools used. Results supported proposing a 1 : 1 neutral complex and the possibility to have different isomers in solution.
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Affiliation(s)
- Emilia Furia
- Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, P Bucci, I-87036 Arcavacata di Rende, Italy.
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Tarahovsky YS, Kim YA, Yagolnik EA, Muzafarov EN. Flavonoid-membrane interactions: involvement of flavonoid-metal complexes in raft signaling. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:1235-46. [PMID: 24472512 DOI: 10.1016/j.bbamem.2014.01.021] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Revised: 01/13/2014] [Accepted: 01/17/2014] [Indexed: 02/07/2023]
Abstract
Flavonoids are polyphenolic compounds produced by plants and delivered to the human body through food. Although the epidemiological analyses of large human populations did not reveal a simple correlation between flavonoid consumption and health, laboratory investigations and clinical trials clearly demonstrate the effectiveness of flavonoids in the prevention of cardiovascular, carcinogenic, neurodegenerative and immune diseases, as well as other diseases. At present, the abilities of flavonoids in the regulation of cell metabolism, gene expression, and protection against oxidative stress are well-known, although certain biophysical aspects of their functioning are not yet clear. Most flavonoids are poorly soluble in water and, similar to lipophilic compounds, have a tendency to accumulate in biological membranes, particularly in lipid rafts, where they can interact with different receptors and signal transducers and influence their functioning through modulation of the lipid-phase behavior. In this study, we discuss the enhancement in the lipophilicity and antioxidative activity of flavonoids after their complexation with transient metal cations. We hypothesize that flavonoid-metal complexes are involved in the formation of molecular assemblies due to the facilitation of membrane adhesion and fusion, protein-protein and protein-membrane binding, and other processes responsible for the regulation of cell metabolism and protection against environmental hazards.
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Affiliation(s)
- Yury S Tarahovsky
- Institute of Theoretical and Experimental Biophysics, RAS, Pushchino, Moscow Region 142290, Russia.
| | - Yuri A Kim
- Institute of Cell Biophysics, RAS, Pushchino, Moscow Region 142290, Russia
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Selvaraj S, Krishnaswamy S, Devashya V, Sethuraman S, Krishnan UM. Investigations on the membrane interactions of naringin and its complexes with copper and iron: implications for their cytotoxicity. RSC Adv 2014. [DOI: 10.1039/c4ra08157a] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Flavonoid glycosides are a group of polyphenols with different glycoside substituents that possess diverse pharmacological activities albeit with lesser potency than their aglycone counterparts.
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Affiliation(s)
- Stalin Selvaraj
- Centre for Nanotechnology & Advanced Biomaterials
- School of Chemical & Biotechnology
- SASTRA University
- Thanjavur – 613 401, India
| | - Sridharan Krishnaswamy
- Centre for Nanotechnology & Advanced Biomaterials
- School of Chemical & Biotechnology
- SASTRA University
- Thanjavur – 613 401, India
| | - Venkappayya Devashya
- Centre for Nanotechnology & Advanced Biomaterials
- School of Chemical & Biotechnology
- SASTRA University
- Thanjavur – 613 401, India
| | - Swaminathan Sethuraman
- Centre for Nanotechnology & Advanced Biomaterials
- School of Chemical & Biotechnology
- SASTRA University
- Thanjavur – 613 401, India
| | - Uma Maheswari Krishnan
- Centre for Nanotechnology & Advanced Biomaterials
- School of Chemical & Biotechnology
- SASTRA University
- Thanjavur – 613 401, India
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48
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Li X, Mai W, Chen D. Chemical Study on Protective Effect Against Hydroxyl-induced DNA Damage and Antioxidant Mechanism of Myricitrin. J CHIN CHEM SOC-TAIP 2013. [DOI: 10.1002/jccs.201300396] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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49
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Li X, Han W, Mai W, Wang L. Antioxidant Activity and Mechanism of Tetrahydroamentoflavone in vitro. Nat Prod Commun 2013. [DOI: 10.1177/1934578x1300800626] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
(2 S,2″ S)-Tetrahydroamentoflavone (THA) is a typical biflavonoid. In this study, we systematically evaluated its antioxidant activity by various antioxidant assays in vitro. The IC50 values of THA were 4.8±0.3, 743.2±49.5, 35.5±1.9, 165.7±22.8, 4.4±0.2, and 77.1±2.2 μg/mL, respectively, for superoxide (•O2-) radical-scavenging, Fe2+-chelating, Cu2+-chelating, DPPH• (1,1-diphenyl-2-picrylhydrazyl radical) scavenging, ABTS•+ (3-ethylbenzthiazoline-6-sulfonic acid radical) scavenging, and Cu2+-reducing power. The average ratio value of IC50, Trolox:IC50, THA was calculated as 2.54, suggesting that THA possesses 2.54 times the total antioxidant level than the standard antioxidant Trolox. THA exerts its antioxidant activity in vitro through metal-chelating, and radical-scavenging, which is via donating a hydrogen atom (H•) and an electron (e). Its antioxidant activity can be responsible for its pharmacological effect and make it an attractive natural antioxidant.
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Affiliation(s)
- Xican Li
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Weijuan Han
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Wenqiong Mai
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
| | - Li Wang
- School of Chinese Herbal Medicine, Guangzhou University of Chinese Medicine, Guangzhou, 510006, China
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Tay WM, da Silva GFZ, Ming LJ. Metal Binding of Flavonoids and Their Distinct Inhibition Mechanisms Toward the Oxidation Activity of Cu2+–β-Amyloid: Not Just Serving as Suicide Antioxidants! Inorg Chem 2013; 52:679-90. [DOI: 10.1021/ic301832p] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- William Maung Tay
- Department of Chemistry, University of South Florida, Tampa,
Florida 33620-5250, United States
| | - Giordano F. Z. da Silva
- Department of Chemistry, University of South Florida, Tampa,
Florida 33620-5250, United States
| | - Li-June Ming
- Department of Chemistry, University of South Florida, Tampa,
Florida 33620-5250, United States
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