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Sharma V, Arora A, Bansal S, Semwal A, Sharma M, Aggarwal A. Role of bio-flavonols and their derivatives in improving mitochondrial dysfunctions associated with pancreatic tumorigenesis. Cell Biochem Funct 2024; 42:e3920. [PMID: 38269510 DOI: 10.1002/cbf.3920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/30/2023] [Accepted: 12/27/2023] [Indexed: 01/26/2024]
Abstract
Mitochondria, a cellular metabolic center, efficiently fulfill cellular energy needs and regulate crucial metabolic processes, including cellular proliferation, differentiation, apoptosis, and generation of reactive oxygen species. Alteration in the mitochondrial functions leads to metabolic imbalances and altered extracellular matrix dynamics in the host, utilized by solid tumors like pancreatic cancer (PC) to get energy benefits for fast-growing cancer cells. PC is highly heterogeneous and remains unidentified for a longer time because of its complex pathophysiology, retroperitoneal position, and lack of efficient diagnostic approaches, which is the foremost reason for accounting for the seventh leading cause of cancer-related deaths worldwide. PC cells often respond poorly to current therapeutics because of dense stromal barriers in the pancreatic tumor microenvironment, which limit the drug delivery and distribution of antitumor immune cell populations. As an alternative approach, various natural compounds like flavonoids are reported to possess potent antioxidant and anticancerous properties and are less toxic than current chemotherapeutic drugs. Therefore, we aim to summarize the current state of knowledge regarding the pharmacological properties of flavonols in PC in this review from the perspective of mitigating mitochondrial dysfunctions associated with cancer cells. Our literature survey indicates that flavonols efficiently regulate cellular metabolism by scavenging reactive oxygen species, mitigating inflammation, and arresting the cell cycle to promote apoptosis in tumor cells via intrinsic mitochondrial pathways. In particular, flavonols proficiently inhibit the cancer-associated proliferation and inflammatory pathways such as EGFR/MAPK, PI3K/Akt, and nuclear factor κB in PC. Overall, this review provides in-depth evidence about the therapeutic potential of flavonols for future anticancer strategies against PC; still, more multidisciplinary human interventional studies are required to dissect their pharmacological effect accurately.
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Affiliation(s)
- Vinit Sharma
- Department of Anatomy, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Ankita Arora
- Department of Anatomy, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Sakshi Bansal
- Department of Anatomy, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Ankita Semwal
- Department of Anatomy, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Mayank Sharma
- Department of Anatomy, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
| | - Anjali Aggarwal
- Department of Anatomy, Post Graduate Institute of Medical Education and Research (PGIMER), Chandigarh, India
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Naróg D, Sobkowiak A. Electrochemistry of Flavonoids. Molecules 2023; 28:7618. [PMID: 38005343 PMCID: PMC10674230 DOI: 10.3390/molecules28227618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/14/2023] [Accepted: 11/14/2023] [Indexed: 11/26/2023] Open
Abstract
This review presents a description of the available data from the literature on the electrochemical properties of flavonoids. The emphasis has been placed on the mechanism of oxidation processes and an attempt was made to find a general relation between the observed reaction paths and the structure of flavonoids. Regardless of the solvent used, three potential regions related to flavonoid structures are characteristic of the occurrence of their electrochemical oxidation. The potential values depend on the solvent used. In the less positive potential region, flavonoids, which have an ortho dihydroxy moiety, are reversibly oxidized to corresponding o-quinones. The o-quinones, if they possess a C3 hydroxyl group, react with water to form a benzofuranone derivative (II). In the second potential region, (II) is irreversibly oxidized. In this potential region, some flavonoids without an ortho dihydroxy moiety can also be oxidized to the corresponding p-quinone methides. The oxidation of the hydroxyl groups located in ring A, which are not in the ortho position, occurs in the third potential region at the most positive values. Some discrepancies in the reported reaction mechanisms have been indicated, and this is a good starting point for further investigations.
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Affiliation(s)
- Dorota Naróg
- Department of Physical Chemistry, Faculty of Chemistry, Rzeszów University of Technology, 35-959 Rzeszów, Poland
| | - Andrzej Sobkowiak
- Department of Physical Chemistry, Faculty of Chemistry, Rzeszów University of Technology, 35-959 Rzeszów, Poland
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Chiorcea-Paquim AM. Electrochemistry of Flavonoids: A Comprehensive Review. Int J Mol Sci 2023; 24:15667. [PMID: 37958651 PMCID: PMC10648705 DOI: 10.3390/ijms242115667] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 10/18/2023] [Accepted: 10/19/2023] [Indexed: 11/15/2023] Open
Abstract
Flavonoids represent a large group of aromatic amino acids that are extensively disseminated in plants. More than six thousand different flavonoids have been isolated and identified. They are important components of the human diet, presenting a broad spectrum of health benefits, including antibacterial, antiviral, antimicrobial, antineoplastic, anti-mutagenic, anti-inflammatory, anti-allergic, immunomodulatory, vasodilatory and cardioprotective properties. They are now considered indispensable compounds in the healthcare, food, pharmaceutical, cosmetic and biotechnology industries. All flavonoids are electroactive, and a relationship between their electron-transfer properties and radical-scavenging activity has been highlighted. This review seeks to provide a comprehensive overview concerning the electron-transfer reactions in flavonoids, from the point of view of their in-vitro antioxidant mode of action. Flavonoid redox behavior is related to the oxidation of the phenolic hydroxy groups present in their structures. The fundamental principles concerning the redox behavior of flavonoids will be described, and the phenol moiety oxidation pathways and the effect of substituents and experimental conditions on flavonoid electrochemical behavior will be discussed. The final sections will focus on the electroanalysis of flavonoids in natural products and their identification in highly complex matrixes, such as fruits, vegetables, beverages, food supplements, pharmaceutical compounds and human body fluids, relevant for food quality control, nutrition, and healthcare research.
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Affiliation(s)
- Ana-Maria Chiorcea-Paquim
- Instituto Pedro Nunes (IPN), 3030-199 Coimbra, Portugal;
- University of Coimbra, Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), Advanced Production and Intelligent Systems (ARISE), Department of Chemistry, 3004-535 Coimbra, Portugal
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Ijaz MU, Haider S, Tahir A, Afsar T, Almajwal A, Amor H, Razak S. Mechanistic insight into the protective effects of fisetin against arsenic-induced reproductive toxicity in male rats. Sci Rep 2023; 13:3080. [PMID: 36813806 PMCID: PMC9947136 DOI: 10.1038/s41598-023-30302-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 02/21/2023] [Indexed: 02/24/2023] Open
Abstract
Arsenic is one of the most hazardous environmental contaminants, which adversely affects the dynamics of male reproductive system. Fisetin (FIS) is a bioactive flavonoid, which is known to exert strong antioxidative effects. Therefore, the current research was planned to evaluate the alleviative efficacy of FIS against arsenic-induced reproductive damages. Forty-eight male albino rats were divided into 4 groups (n = 12), which were treated as follows: (1) Control, (2) Arsenic-intoxicated group (8 mg kg-1), (3) Arsenic + FIS-treated group (8 mg kg-1 + 10 mg kg-1), and (4) FIS-treated group (10 mgkg-1). After 56 days of treatment, the biochemical, lipidemic, steroidogenic, hormonal, spermatological, apoptotic and histoarchitectural profiles of rats were analyzed. Arsenic intoxication reduced the enzymatic activities of catalase (CAT), superoxide dismutase (SOD), glutathione peroxidase (GPx) and glutathione reductase (GSR), in addition to glutathione (GSH) level. Conversely, the levels of thiobarbituric acid reactive substance (TBARS) and reactive oxygen species (ROS) were increased. Moreover, it escalated the level of low-density lipoprotein (LDL), triglycerides and total cholesterol, while declining the level of high-density lipoprotein (HDL). Furthermore, steroidogenic enzymes expressions, 3β-hydroxysteroid dehydrogenase (HSD), 17β-HSD, steroidogenic acute regulatory protein (StAR), cholesterol side-chain cleavage enzyme (CYP11A1) and 17α-hydroxylase/17, 20-lyase (CYP17A1), were found to be reduced, which brought down the level of testosterone. Besides, the levels of gonadotropins (LH and FSH) were decreased. Additionally, a decline in sperm mitochondrial membrane potential (MMP), motility, epididymal sperm count and hypo-osmotic swelling (HOS) coil-tailed sperms was observed, whereas the dead sperms and structural damages (head, midpiece and tail) of sperms were escalated. Moreover, arsenic exposure up-regulated the mRNA expressions of apoptotic markers, namely Bax and caspase-3, whereas lowered the expression of anti-apoptotic marker, Bcl-2. In addition, it induced histoarchitectural changes in testes of rats. However, FIS treatment resulted in remarkable improvements in testicular and sperm parameters. Therefore, it was inferred that FIS could serve as a therapeutic candidate against arsenic-generated male reproductive toxicity attributing to its anti-oxidant, anti-lipoperoxidative, anti-apoptotic, and androgenic efficacy.
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Affiliation(s)
- Muhammad Umar Ijaz
- Department of Zoology, Wildlife and Fisheries, University of Agriculture, Faisalabad, Pakistan.
| | - Saqlain Haider
- grid.413016.10000 0004 0607 1563Department of Zoology, Wildlife and Fisheries, University of Agriculture, Faisalabad, Pakistan
| | - Arfa Tahir
- grid.413016.10000 0004 0607 1563Department of Zoology, Wildlife and Fisheries, University of Agriculture, Faisalabad, Pakistan
| | - Tayyaba Afsar
- grid.56302.320000 0004 1773 5396Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Ali Almajwal
- grid.56302.320000 0004 1773 5396Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia
| | - Houda Amor
- grid.11749.3a0000 0001 2167 7588Department of Obstetrics, Gynecology and Reproductive Medicine, Saarland University Clinic, Homburg, Germany
| | - Suhail Razak
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh, Saudi Arabia.
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Fisetin and Robinetin antiradical activity under solvent effect: density functional theory study. J Mol Model 2022; 28:240. [PMID: 35913682 DOI: 10.1007/s00894-022-05223-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 07/13/2022] [Indexed: 10/16/2022]
Abstract
The structural and antioxidant activity of two flavonols, namely, Fisetin and Robinetin, have been investigated employing the density functional theory (DFT) using B3LYP functional and 6-311++G (d, p) basis set. The calculations were performed in the gas phase and under the solvent effect of water, dimethylsulfoxide (DMSO), methanol, and benzene. The Hydrogen-Atom Transfer (HAT), single Electron Transfer Followed by Proton Transfer (SET-PT), and sequential Proton Loss Electron Transfer (SPLET) mechanisms were investigated to rationalize the radical scavenging capacities and to identify the favored antioxidant mechanism. Hence, the bond dissociation enthalpies (BDE) ionization potential (IP), IE, proton dissociation enthalpy (PDE), proton affinity (PA), and electron Transfer enthalpy (ETE) related to each mechanism were reported and discussed in function of the solvent effect. For both flavonols, the results showed that 4'-OH hydroxyl is the preferred active site following the trend 4'-OH > 3'-OH > 3-OH > (5'-OH) > 7-OH. Besides, the HAT mechanism is energetically the most favored pathway. The energetically favored solvents follow the trends water > DMSO > benzene > methanol and benzene > DMSO > methanol > water, for Fisetin and Robinetin, respectively.
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Eguchi H, Kimura R, Matsunaga H, Matsunaga T, Yoshino Y, Endo S, Ikari A. Increase in Anticancer Drug-Induced Toxicity by Fisetin in Lung Adenocarcinoma A549 Spheroid Cells Mediated by the Reduction of Claudin-2 Expression. Int J Mol Sci 2022; 23:ijms23147536. [PMID: 35886884 PMCID: PMC9316057 DOI: 10.3390/ijms23147536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/04/2022] [Accepted: 07/05/2022] [Indexed: 11/26/2022] Open
Abstract
Claudin-2 (CLDN2), a component of tight junction, is involved in the reduction of anticancer drug-induced toxicity in spheroids of A549 cells derived from human lung adenocarcinoma. Fisetin, a dietary flavonoid, inhibits cancer cell growth, but its effect on chemosensitivity in spheroids is unknown. Here, we found that fisetin (20 μM) decreases the protein level of CLDN2 to 22.3%. Therefore, the expression mechanisms were investigated by real-time polymerase chain reaction and Western blotting. Spheroids were formed in round-bottom plates, and anticancer drug-induced toxicity was measured by ATP content. Fisetin decreased the phosphorylated-Akt level, and CLDN2 expression was decreased by a phosphatidylinositol 3-kinase (PI3K) inhibitor, suggesting the inhibition of PI3K/Akt signal is involved in the reduction of CLDN2 expression. Hypoxia level, one of the hallmarks of tumor microenvironment, was reduced by fisetin. Although fisetin did not change hypoxia inducible factor-1α level, it decreased the protein level of nuclear factor erythroid 2-related factor 2, a stress response factor, by 25.4% in the spheroids. The toxicity of doxorubicin (20 μM) was enhanced by fisetin from 62.8% to 40.9%, which was rescued by CLDN2 overexpression (51.7%). These results suggest that fisetin can enhance anticancer drug toxicity in A549 spheroids mediated by the reduction of CLDN2 expression.
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Affiliation(s)
- Hiroaki Eguchi
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (H.E.); (R.K.); (H.M.); (Y.Y.); (S.E.)
| | - Riho Kimura
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (H.E.); (R.K.); (H.M.); (Y.Y.); (S.E.)
| | - Haruka Matsunaga
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (H.E.); (R.K.); (H.M.); (Y.Y.); (S.E.)
| | - Toshiyuki Matsunaga
- Education Center of Green Pharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 502-8585, Japan;
| | - Yuta Yoshino
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (H.E.); (R.K.); (H.M.); (Y.Y.); (S.E.)
| | - Satoshi Endo
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (H.E.); (R.K.); (H.M.); (Y.Y.); (S.E.)
| | - Akira Ikari
- Laboratory of Biochemistry, Department of Biopharmaceutical Sciences, Gifu Pharmaceutical University, Gifu 501-1196, Japan; (H.E.); (R.K.); (H.M.); (Y.Y.); (S.E.)
- Correspondence: ; Tel./Fax: +81-58-230-8124
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Al Mamun A, Sufian MA, Uddin MS, Sumsuzzman DM, Jeandet P, Islam MS, Zhang HJ, Kong AN, Sarwar MS. Exploring the role of senescence inducers and senotherapeutics as targets for anticancer natural products. Eur J Pharmacol 2022; 928:174991. [PMID: 35513016 DOI: 10.1016/j.ejphar.2022.174991] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 04/18/2022] [Accepted: 04/28/2022] [Indexed: 01/10/2023]
Abstract
During the last few decades, cancer has remained one of the deadliest diseases that endanger human health, emphasizing urgent drug discovery. Cellular senescence has gained a great deal of attention in recent years because of its link to the development of cancer therapy. Senescent cells are incapable of proliferating due to irreversibly inhibited the initiation of the cell cycle pathways. However, senescent cells aggregate in tissues and produce a pro-inflammatory secretome called senescence-associated secretory phenotype (SASP) that can cause serious harmful effects if not managed properly. There is mounting evidence that senescent cells lead to various phases of tumorigenesis in various anatomical sites, owing mostly to the paracrine activities of the SASP. Therefore, a new treatment field called senotherapeutics has been established. Senotherapeutics are newly developed anticancer agents that have been demonstrated to inhibit cancer effectively. In light of recent findings, several promising natural products have been identified as senescence inducers and senotherapeutics, including, miliusanes, epigallocatechin gallate, phloretin, silybin, resveratrol, genistein, sulforaphane, quercetin, allicin, fisetin, piperlongumine, berberine, triptolide, tocotrienols and curcumin analogs. Several of them have already been validated through preclinical trials and exert an enormous potential for clinical trials. This review article focuses on and summarises the latest advances on cellular senescence and its potential as a target for cancer treatment and highlights the well-known natural products as senotherapeutics for cancer treatment.
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Affiliation(s)
- Abdullah Al Mamun
- Teaching and Research Division, School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong
| | | | - Md Sahab Uddin
- Department of Pharmacy, Southeast University, Dhaka, Bangladesh; Pharmakon Neuroscience Research Network, Dhaka, Bangladesh
| | | | - Philippe Jeandet
- University of Reims Champagne-Ardenne, Research Unit, Induced Resistance and Plant Bioprotection, EA 4707, SFR Condorcet FR CNRS 3417, Faculty of Sciences, PO Box 1039, 51687, Reims, Cedex 2, France
| | - Mohammad Safiqul Islam
- Department of Pharmacy, Noakhali Science and Technology University, Noakhali, 3814, Bangladesh
| | - Hong-Jie Zhang
- Teaching and Research Division, School of Chinese Medicine, Hong Kong Baptist University, 7 Baptist University Road, Kowloon Tong, Kowloon, Hong Kong
| | - Ah-Ng Kong
- Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, 08854, USA
| | - Md Shahid Sarwar
- Department of Pharmacy, Noakhali Science and Technology University, Noakhali, 3814, Bangladesh; Department of Pharmaceutics, Ernest Mario School of Pharmacy, Rutgers, The State University of New Jersey, Piscataway, NJ, 08854, USA.
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8
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Narog D, Sobkowiak A. Electrochemical investigation of some flavonoids in aprotic media. ELECTROANAL 2022. [DOI: 10.1002/elan.202100492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Wang D, Bai T, Wang X, Xiong Y, Zhang Y, Shi Z, Zhang F, Lu W, Qing G. Sensing Mechanism of
Excited‐State
Intermolecular Hydrogen Bond for Phthalimide: Indispensable Role of Dimethyl Sulfoxide. CHINESE J CHEM 2021. [DOI: 10.1002/cjoc.202000604] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dongdong Wang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian Liaoning 116023 China
| | - Tianxin Bai
- Institute of Molecular Sciences and Engineering, Shandong University, Qingdao Shandong 266237 China
| | - Xue Wang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian Liaoning 116023 China
| | - Yuting Xiong
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian Liaoning 116023 China
| | - Yahui Zhang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian Liaoning 116023 China
| | - Zhenqiang Shi
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian Liaoning 116023 China
| | - Fusheng Zhang
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian Liaoning 116023 China
| | - Wenqi Lu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian Liaoning 116023 China
| | - Guangyan Qing
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian Liaoning 116023 China
- College of Chemistry and Chemical Engineering, Wuhan Textile University 1 Sunshine Road Wuhan Hubei 430200 China
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Wang Y, Guo Y, Wu Z, Zhang H, Wang C, Zhao G. Conformational torsion, intramolecular hydrogen bonding and solvent effects in intersystem crossing of singlet-triplet excited states for heavy-atom-free organic long persistent luminescence. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.115291] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Antiradical Properties of trans-2-(4-substituted-styryl)-thiophene. J Fluoresc 2020; 31:51-61. [PMID: 33057974 DOI: 10.1007/s10895-020-02629-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Accepted: 10/05/2020] [Indexed: 11/27/2022]
Abstract
2-substituted thiophene compounds with electron donating and electron withdrawing p-phenyl substitution were synthesized and studied their radical scavenging properties using DPPH assay and DFT method. It is shown that p-hydroxy and p-amino phenyl substituted compound exhibit radical scavenging activity. From DFT and radical scavenging studies, a correlation between IC50 with the bond dissociation enthalpy, proton affinity, ground state dipole moment and optical band gap of compound is found. Compounds 1-3 with electron withdrawing substituent (NO2, CN, Cl) do not show any radical scavenging properties, whereas compounds 6-7 with electron donating substituent (OH, NH2) show antiradical properties. Further, the antiradical activity is reduced drastically by replacing the -OH and -NH2 with methoxy and -N-alkylating group respectively in 6 and 7. The compound with p-hydroxy phenyl substitution, exhibits stronger antiradical activity as compared to the p-amino phenyl substitution due to smaller O-H bond dissociation energy as compared to the N-H bond. From DPPH and DFT studies, it is suggested that the radical scavenging activity in 2-substituted thiophene is occurred through proton transfer mechanism. The other possible SET, SPLET mechanisms are also corroborated. Graphical Abstract Antiradical properties of trans-2-(4-substituted-styryl)-thiophene Anamika Gusain, Naresh Kumar, Jagdeep Kumar, Gunjan Pandey, Prasanta Kumar Hota.
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Chiorcea-Paquim AM, Enache TA, De Souza Gil E, Oliveira-Brett AM. Natural phenolic antioxidants electrochemistry: Towards a new food science methodology. Compr Rev Food Sci Food Saf 2020; 19:1680-1726. [PMID: 33337087 DOI: 10.1111/1541-4337.12566] [Citation(s) in RCA: 89] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 03/26/2020] [Accepted: 03/31/2020] [Indexed: 11/27/2022]
Abstract
Natural phenolic compounds are abundant in the vegetable kingdom, occurring mainly as secondary metabolites in a wide variety of chemical structures. Around 10,000 different plant phenolic derivatives have been isolated and identified. This review provides an exhaustive overview concerning the electron transfer reactions in natural polyphenols, from the point of view of their in vitro antioxidant and/or pro-oxidant mode of action, as well as their identification in highly complex matrixes, for example, fruits, vegetables, wine, food supplements, relevant for food quality control, nutrition, and health research. The accurate assessment of polyphenols' redox behavior is essential, and the application of the electrochemical methods in routine quality control of natural products and foods, where the polyphenols antioxidant activity needs to be quantified in vitro, is of the utmost importance. The phenol moiety oxidation pathways and the effect of substituents and experimental conditions on their electrochemical behavior will be reviewed. The fundamental principles concerning the redox behavior of natural polyphenols, specifically flavonoids and other benzopyran derivatives, phenolic acids and ester derivatives, quinones, lignins, tannins, lignans, essential oils, stilbenes, curcuminoids, and chalcones, will be described. The final sections will focus on the electroanalysis of phenolic antioxidants in natural products and the electroanalytical evaluation of in vitro total antioxidant capacity.
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Affiliation(s)
| | - Teodor Adrian Enache
- CEMMPRE, Department of Chemistry, University of Coimbra, Coimbra, 3004-535, Portugal
| | - Eric De Souza Gil
- CEMMPRE, Department of Chemistry, University of Coimbra, Coimbra, 3004-535, Portugal.,Faculdade de Farmácia, Universidade Federal de Goiás, Setor Universitário, Goiânia, Goiás, Brasil
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Qi Y, Tang Z, Zhan H, Wang Y, Zhao Y, Fei X, Tian J, Yu L, Liu J. A new interpretation of the ESIPT mechanism of 2-(benzimidazol-2-yl)-3-hydroxychromone derivatives. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 224:117359. [PMID: 31344583 DOI: 10.1016/j.saa.2019.117359] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/20/2019] [Accepted: 07/07/2019] [Indexed: 06/10/2023]
Abstract
The present study demonstrates the excited-state intramolecular proton transfer (ESIPT) mechanism of 2-(benzimidazol-2-yl)-3-hydroxychromone (DH3B2) is based on density functional theory (DFT) and time-dependent density functional theory (TDDFT) methods. We find that DH3B2-C is the main conformation to occur ESIPT. Moreover, we get the different results of DH3B2 for the ESIPT mechanisms in comparison with the previous reports. We have optimized three isomers (DH3B2-A, DH3B2-B and DH3B2-C), and calculated absorption and fluorescence spectra, which agree well with the experimental data. Furthermore, we prove the hydrogen bond is enhanced in the S1 state by comparing infrared vibrational spectra, the relevant bond length and bond angle. In our calculations, the results of the three levels of calculations (CAM-B3LYP/TZVP, B3LYP/TZVP and PBEPBE/TZVP) indicate that DH3B2-C is the most stable conformation, by compared the single point energy of three isomers. By constructed the potential energy surfaces (PESs), we find the converted relationship among the three isomers; DH3B2-C is the main conformation in which DH3B2 exists. Furthermore, combination with reduced density gradient (RDG) function, the hydrogen bond of DH3B2-C is stronger than that of DH3B2-A and DH3B2-B, which proves that DH3B2-C form is the most favorable form for ESIPT among the three isomers. Meanwhile, we have further investigated the ESIPT mechanisms of DH3B2, via constructing the potential energy curves (PECs). These results have shown that DH3B2-C is easier to ESIPT occur than DH3B2-A and DH3B2-B. Therefore, the proton receptors of the ESIPT are mainly the benzimidazole nitrogen atoms.
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Affiliation(s)
- Yutai Qi
- School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, PR China
| | - Zhe Tang
- Institute of Molecular Sciences and Engineering, Shandong University, Qing dao 266237, PR China
| | - Hongbin Zhan
- School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, PR China
| | - Yi Wang
- School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, PR China.
| | - Yanliang Zhao
- Institute of Molecular Sciences and Engineering, Shandong University, Qing dao 266237, PR China
| | - Xu Fei
- School of Textile and Material Engineering, Dalian Polytechnic University, Dalian 116034, PR China
| | - Jing Tian
- School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, PR China
| | - Ling Yu
- Lab Analyst of Network Information Center, Dalian Polytechnic University, Dalian 116034, PR China.
| | - Jianyong Liu
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, PR China.
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Chen Y, Piao Y, Feng X, Yu X, Jin X, Zhao G. Excited state intramolecular proton transfer (ESIPT) luminescence mechanism for 4-N,N-diethylamino-3-hydroxyflavone in propylene carbonate, acetonitrile and the mixed solvents. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 224:117416. [PMID: 31394389 DOI: 10.1016/j.saa.2019.117416] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2019] [Revised: 07/15/2019] [Accepted: 07/22/2019] [Indexed: 06/10/2023]
Abstract
In this work, density functional theory (DFT) and time density functional theory (TDDFT) methods were employed to investigate the nature of the double fluorescence emission of DEAHF in these three solvents. We analyzed the geometric structures, vibrational frequencies, frontier molecular orbitals (MOs), molecular electrostatic potential surface (MEPS), calculated absorption and fluorescence spectra and the potential-energy curves for DEAHF. All the results show that the intramolecular hydrogen bond of DEAHF is strengthened from S0 to S1 and the electron density redistribution occurs between the proton acceptor and donor, which can facilitate ESIPT. Moreover, the geometric structures, absorption and emission spectra, MEPS and potential-energy curve of DEAHF are identical. It reveals theoretically that ACN and PC can maintain the polarity of the solvent with 1:1 mixing, which is consistent with the experimental results.
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Affiliation(s)
- Yan Chen
- School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, China; Tianjin Key Laboratory of Molecular Optoelectronic Sciences, National Demonstration Center for Experimental Chemistry & Chemical Engineering Education, National Virtual Simulation Experimental Teaching Center for Chemistry & Chemical engineering Education, Department of Chemistry, School of Science, Tianjin University, Tianjin 300354, China
| | - Yongzhe Piao
- School of Biological Engineering, Dalian Polytechnic University, Dalian 116034, China; College of Life Sciences, Dalian Nationalities University, Dalian 116600, China.
| | - Xia Feng
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, National Demonstration Center for Experimental Chemistry & Chemical Engineering Education, National Virtual Simulation Experimental Teaching Center for Chemistry & Chemical engineering Education, Department of Chemistry, School of Science, Tianjin University, Tianjin 300354, China
| | - Xi Yu
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, National Demonstration Center for Experimental Chemistry & Chemical Engineering Education, National Virtual Simulation Experimental Teaching Center for Chemistry & Chemical engineering Education, Department of Chemistry, School of Science, Tianjin University, Tianjin 300354, China
| | - Xiaoning Jin
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, National Demonstration Center for Experimental Chemistry & Chemical Engineering Education, National Virtual Simulation Experimental Teaching Center for Chemistry & Chemical engineering Education, Department of Chemistry, School of Science, Tianjin University, Tianjin 300354, China
| | - Guangjiu Zhao
- Tianjin Key Laboratory of Molecular Optoelectronic Sciences, National Demonstration Center for Experimental Chemistry & Chemical Engineering Education, National Virtual Simulation Experimental Teaching Center for Chemistry & Chemical engineering Education, Department of Chemistry, School of Science, Tianjin University, Tianjin 300354, China.
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Kumar J, Kumar N, Sati N, Hota PK. Antioxidant properties of ethenyl indole: DPPH assay and TDDFT studies. NEW J CHEM 2020. [DOI: 10.1039/d0nj01317j] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Ethenyl indole exhibits antioxidant activity in a substituent dependent manner. Ethenyls bearing strong electron withdrawing substituents show weak or no antioxidant activities, whereas ethenyls with electron donating substituents exhibit antioxidant properties comparable to vitamin E.
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Affiliation(s)
- Jagdeep Kumar
- Department of Chemistry
- School of Sciences
- Hemvati Nandan Bahuguna Garhwal University
- Srinagar (Garhwal)
- India
| | - Naresh Kumar
- Department of Chemistry
- School of Sciences
- Hemvati Nandan Bahuguna Garhwal University
- Srinagar (Garhwal)
- India
| | - Nitin Sati
- Department of Pharmaceutical Sciences
- School of Sciences
- Hemvati Nandan Bahuguna Garhwal University
- Srinagar (Garhwal)
- India
| | - Prasanta Kumar Hota
- Department of Chemistry
- School of Sciences
- Hemvati Nandan Bahuguna Garhwal University
- Srinagar (Garhwal)
- India
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Li W, Qin L, Feng R, Hu G, Sun H, He Y, Zhang R. Emerging senolytic agents derived from natural products. Mech Ageing Dev 2019; 181:1-6. [PMID: 31077707 DOI: 10.1016/j.mad.2019.05.001] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 04/05/2019] [Accepted: 05/07/2019] [Indexed: 01/10/2023]
Abstract
Cellular senescence is a hallmark of aging, it is a permanent state of cell cycle arrest induced by cellular stresses. During the aging process, senescent cells (SCs) increasingly accumulate in tissues, causing a loss of tissue-repair capacity because of cell cycle arrest in progenitor cells and produce proinflammatory and matrix-degrading molecules which are known as the senescence-associated secretory phenotype (SASP), and thereby contribute to the development of various age-related diseases. Genetic evidence has demonstrated that clearance of SCs can delay aging and extend healthspan. Senolytics, small molecules that can selectively kill SCs, have been developed to treat various age-related diseases. In recent years, emerging natural compounds have been discovered to be effective senolytic agents, such as quercetin, fisetin, piperlongumine and the curcumin analog. Some of the compounds have been validated in animal models and have great potential to be pushed to clinical applications. In this review, we will discuss cellular senescence and its potential as a target for treating age-related diseases, and summarize the known natural compounds as senolytic agents and their applications.
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Affiliation(s)
- Wen Li
- School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan 650500, China; Department of Endocrinology, The Third People's Hospital of Yunnan Province, Kunming, Yunnan 650011, China
| | - Lin Qin
- School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan 650500, China; Department of Endocrinology, The First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650000, China
| | - Rennan Feng
- Department of Nutrition and Food Hygiene, School of Public Health, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Guangrong Hu
- Department of Emergency, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Hui Sun
- Department of Emergency, The Second Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Yonghan He
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming 650223, China.
| | - Rongping Zhang
- School of Pharmaceutical Science and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan 650500, China.
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Zhang D, Wang Y, Sun X, Liu Y, Zhou Y, Shin HC, Wang Y, Shen L, Wang C, Wang S, Zou X. Voltammetric, spectroscopic, and cellular characterization of redox functionality of eckol and phlorofucofuroeckol-A: A comparative study. J Food Biochem 2019; 43:e12845. [PMID: 31353689 DOI: 10.1111/jfbc.12845] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 03/05/2019] [Accepted: 03/07/2019] [Indexed: 12/24/2022]
Abstract
Interest in phlorotannins has increased in recent years largely due to antioxidant capacity, however, the redox mechanism of phlorotannins is still obscure. In the present study, the electrochemical oxidation mechanisms of eckol (EL) and phlorofucofuroeckol-A (PFF-A), two representative phlorotannin compounds, were comparatively analyzed in a wide pH range using cyclic and differential pulse voltammetry as well as spectroscopic assay. The voltammetric study revealed that EL and PFF-A were successively oxidized in three pH-dependent steps. Moreover, it was found that the PFF-A presented a stronger proton and electron transferring activity as compared to EL since PFF-A exhibited lower acid-base dissociation constant (pKa ) value and higher heterogeneous rate constant (kbh ) value in the first oxidation step. These property were further evidenced by comparison of direct antioxidant activity (i.e., superoxide anion and peroxide radicals) as well as indirect antioxidant activity (i.e., mRNA expression of two phase II enzymes) between EL and PFF-A. PRACTICAL APPLICATIONS: Phlorotannins from edible algae have been regarded as novel antioxidants those presented high application potential in food industry. Even though antioxidant activity of phlorotannin compounds have been widely investigated in both in vitro and in vivo studies, very few reports focused on electron transferring functionality which is chemical basis for antioxidant process. Herein, the oxidative mechanisms of two representative phlorotannins were comparatively analyzed using multiple electrochemical methods. This is hopefully to give information on the chemical meaning behind the antioxidant activity of dietary phlorotannins.
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Affiliation(s)
- Di Zhang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Ying Wang
- Centre Testing International Corporation, Qingdao, China
| | - Xiaoxia Sun
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Yixiang Liu
- College of Food and Biological Engineering, Jimei University, Xiamen, China
| | - Yaojie Zhou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
| | - Hyeon-Cheol Shin
- Center for Molecular Intelligence, SUNY Korea, Incheon, South Korea
| | - Yong Wang
- Academy of State Administration of Grain, Beijing, China
| | - Lingqin Shen
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, China
| | - Chengtao Wang
- Beijing Engineering and Technology Research Center of Food Additives, Beijing Technology & Business University (BTBU), Beijing, China
| | - Shaoyun Wang
- College of Biological Science and Technology, Fuzhou University, Fuzhou, China
| | - Xiaobo Zou
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang, China
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Maciel EN, Soares IN, da Silva SC, de Souza GLC. A computational study on the reaction between fisetin and 2,2-diphenyl-1-picrylhydrazyl (DPPH). J Mol Model 2019; 25:103. [DOI: 10.1007/s00894-019-3969-8] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 02/08/2019] [Indexed: 01/29/2023]
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Elkholy R, Balaha M, El-Anwar N, Kandeel S, Hedya S, Abd-El Rahman MN. Fisetin and telmisartan each alone or in low-dose combination alleviate OVA-induced food allergy in mice. Pharmacol Rep 2019; 71:330-337. [PMID: 30826574 DOI: 10.1016/j.pharep.2018.12.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2018] [Revised: 10/17/2018] [Accepted: 12/20/2018] [Indexed: 01/23/2023]
Abstract
BACKGROUND Food allergy (FA) is a worldwide health problem, affecting nearly 10% of all populations, with no prophylactic options or regulatory treatment available until now. Fisetin, a biologically active flavonoid, and telmisartan, the highly selective competitive AT1 receptor antagonist, recently exhibited potent anti-inflammatory and immunomodulatory activities. In the present study, we have evaluated the possible anti-inflammatory and immunomodulatory activities of fisetin and telmisartan each alone or in low-dose combination in a mouse model of FA. METHODS For induction of FA, eight-week-old BALB/c mice, sensitized by two ip injection of 50 μg ovalbumin (OVA) and 1 mg alum at day 0 and 7. Then, each mouse challenged with 10 mg OVA at days 14, 16, 18, and 21. On the 28th day, the fifth challenge carried out by oral administration of 50 mg OVA. Either fisetin (1 or 3 mg/kg/d), telmisartan (1 or 3 mg/kg/d) or a combination of fisetin 1 mg/kg/d and telmisartan 1 mg/kg/d received orally from the 13th day till 28th day. In challenge days, the treatments received one-hour before the challenge. RESULTS Our data showed that fisetin and telmisartan each alone or in low-dose combination attenuated the anaphylactic manifestation, decreased blood eosinophilic count, serum OVA-specific IgE, and IL-4 levels, the intestinal total and degranulated mast cells count, and CD4+ immunohistochemical expression. Furthermore, they enhanced the serum IFN-γ level and abrogated the intestinal histopathological changes induced by OVA in mice. CONCLUSION Either fisetin, telmisartan or their low-dose combination could be promising in the management of FA.
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Affiliation(s)
- Reem Elkholy
- Pharmacology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Mohamed Balaha
- Department of Clinical Pharmacy, College of Pharmacy, Prince Sattam Bin Abdulaziz University, Saudi Arabia; Pharmacology Department, Faculty of Medicine, Tanta University, Tanta, Egypt.
| | - Noha El-Anwar
- Pathology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Samah Kandeel
- Histology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Sabiha Hedya
- Pharmacology Department, Faculty of Medicine, Tanta University, Tanta, Egypt
| | - Mohamed-Nabih Abd-El Rahman
- Pharmacology Department, Faculty of Medicine, Tanta University, Tanta, Egypt; Pharmacology Department, Faculty of Medicine, Bisha University, Saudi Arabia
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20
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Li C, Guo W, Zhou P, Tang Z. The effects of the heteroatom and position on excited-state intramolecular proton transfer of new hydroxyphenyl benzoxazole derivatives: a time-dependent density functional theory study. Org Chem Front 2019. [DOI: 10.1039/c9qo00295b] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The effects of the heteroatom and position on excited-state intramolecular proton transfer (ESIPT) of 2-[4′-(N-4,6-dichloro-1,3,5-triazi-n-2-yl)2′hydroxyphenyl]benzoxazole (4THBO) have been investigated via time-dependent density functional theory studies.
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Affiliation(s)
- Changming Li
- School of Electrical Engineering
- University of South China
- Hengyang 421001
- China
- State Key Lab of Molecular Reaction Dynamics
| | - Wei Guo
- School of Electrical Engineering
- University of South China
- Hengyang 421001
- China
| | - Panwang Zhou
- Institute of Molecular Sciences and Engineering
- Shandong University
- Qingdao 266235
- P. R. China
| | - Zhe Tang
- Institute of Molecular Sciences and Engineering
- Shandong University
- Qingdao 266235
- P. R. China
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21
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A review on the chemotherapeutic potential of fisetin: In vitro evidences. Biomed Pharmacother 2018; 97:928-940. [DOI: 10.1016/j.biopha.2017.10.164] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 10/23/2017] [Accepted: 10/29/2017] [Indexed: 12/23/2022] Open
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22
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Antioxidant properties of the flavonoid fisetin: An updated review of in vivo and in vitro studies. Trends Food Sci Technol 2017. [DOI: 10.1016/j.tifs.2017.10.003] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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23
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Boucherle B, Peuchmaur M, Boumendjel A, Haudecoeur R. Occurrences, biosynthesis and properties of aurones as high-end evolutionary products. PHYTOCHEMISTRY 2017; 142:92-111. [PMID: 28704688 DOI: 10.1016/j.phytochem.2017.06.017] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2017] [Revised: 05/22/2017] [Accepted: 06/30/2017] [Indexed: 05/06/2023]
Abstract
Recent years have witnessed a considerable renewed interest for the uncommon flavonoid class of aurones. The characterization of two major biosynthetic machineries involved in their biosynthesis in flowers has encouraged the revival of phytochemical studies and identification of original structures, a process started almost seventy-five years ago. This review draws up an exhaustive map of natural occurrences of aurones their biosynthetic pathways and roles, with the aim to link their original structural properties among flavonoids to their place in evolution and the selective advantages they bring to some of the most advanced taxa in the plant kingdom.
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Affiliation(s)
- Benjamin Boucherle
- Univ. Grenoble-Alpes, CNRS, DPM UMR 5063, CS 40700, 38058, Grenoble, France
| | - Marine Peuchmaur
- Univ. Grenoble-Alpes, CNRS, DPM UMR 5063, CS 40700, 38058, Grenoble, France
| | - Ahcène Boumendjel
- Univ. Grenoble-Alpes, CNRS, DPM UMR 5063, CS 40700, 38058, Grenoble, France
| | - Romain Haudecoeur
- Univ. Grenoble-Alpes, CNRS, DPM UMR 5063, CS 40700, 38058, Grenoble, France.
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24
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Bayat A, Fattahi A. A quantum chemical study on the OH radical quenching by natural antioxidant fisetin. J PHYS ORG CHEM 2017. [DOI: 10.1002/poc.3692] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Ahmad Bayat
- Department of Chemistry; Sharif University of Technology; Tehran Iran
| | - Alireza Fattahi
- Department of Chemistry; Sharif University of Technology; Tehran Iran
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25
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Ramešová Š, Degano I, Sokolová R. The oxidative decomposition of natural bioactive compound rhamnetin. J Electroanal Chem (Lausanne) 2017. [DOI: 10.1016/j.jelechem.2017.01.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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26
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Han G, Zeng Q, Jiang Z, Xing T, Huang C, Li Y. MIL-101(Cr) as matrix for sensitive detection of quercetin by matrix-assisted laser desorption/ionization mass spectrometry. Talanta 2017; 164:355-361. [DOI: 10.1016/j.talanta.2016.11.044] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 11/15/2016] [Accepted: 11/20/2016] [Indexed: 01/25/2023]
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Sechi M, Syed DN, Pala N, Mariani A, Marceddu S, Brunetti A, Mukhtar H, Sanna V. Nanoencapsulation of dietary flavonoid fisetin: Formulation and in vitro antioxidant and α-glucosidase inhibition activities. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 68:594-602. [PMID: 27524059 DOI: 10.1016/j.msec.2016.06.042] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 05/31/2016] [Accepted: 06/12/2016] [Indexed: 01/13/2023]
Abstract
The bioactive flavonoid fisetin (FS) is a diet-derived antioxidant that is being increasingly investigated for its health-promoting effects. Unfortunately, the poor physicochemical and pharmacokinetic properties affect and limit the clinical application. In this study, novel polymeric nanoparticles (NPs), based on Poly-(ε-caprolactone) (PCL) and PLGA-PEG-COOH, encapsulating FS were formulated as suitable oral controlled release systems. Results showed NPs having a mean diameter of 140-200nm, and a percent loading of FS ranging from 70 to 82%. In vitro release studies revealed that NPs are able to protect and preserve the release of FS in gastric simulated conditions, also controlling the release in the intestinal medium. Moreover, the DPPH and ABTS scavenging capacity of FS, as well as α-glucosidase inhibition activity, that resulted about 20-fold higher than commercial Acarbose, were retained during nanoencapsulation process. In summary, our developed NPs can be proposed as an attractive delivery system to control the release of antioxidant and anti-hyperglycemic FS for nutraceutical and/or therapeutic application.
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Affiliation(s)
- Mario Sechi
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy; Laboratory of Nanomedicine, Department of Chemistry and Pharmacy, University of Sassari, c/o Porto Conte Ricerche, Tramariglio, 07041 Alghero, Italy
| | - Deeba N Syed
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin, 1300 University Avenue, Madison, USA
| | - Nicolino Pala
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Alberto Mariani
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Salvatore Marceddu
- CNR - Istituto Scienze delle Produzioni Alimentari, Traversa La Crucca, 3 - Località Baldinca, 07040 Li Punti, Sassari, Italy
| | - Antonio Brunetti
- POLCOMING Department, Section of Information Engineering, University of Sassari, via Piandanna 4, 07100 Sassari, Italy
| | - Hasan Mukhtar
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin, 1300 University Avenue, Madison, USA
| | - Vanna Sanna
- Department of Chemistry and Pharmacy, University of Sassari, Via Vienna 2, 07100 Sassari, Italy; Laboratory of Nanomedicine, Department of Chemistry and Pharmacy, University of Sassari, c/o Porto Conte Ricerche, Tramariglio, 07041 Alghero, Italy.
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Exploring the molecular targets of dietary flavonoid fisetin in cancer. Semin Cancer Biol 2016; 40-41:130-140. [PMID: 27163728 DOI: 10.1016/j.semcancer.2016.04.003] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Revised: 04/05/2016] [Accepted: 04/17/2016] [Indexed: 01/08/2023]
Abstract
The last few decades have seen a resurgence of interest among the scientific community in exploring the efficacy of natural compounds against various human cancers. Compounds of plant origin belonging to different groups such as alkaloids, flavonoids and polyphenols evaluated for their cancer preventive effects have yielded promising data, thereby offering a potential therapeutic alternative against this deadly disease. The flavonol fisetin (3,3',4',7-tetrahydroxyflavone), present in fruits and vegetables such as strawberries, apple, cucumber, persimmon, grape and onion, was shown to possess anti-microbial, anti-inflammatory, anti-oxidant and more significantly anti-carcinogenic activity when assessed in diverse cell culture and animal model systems. The purpose of this review is to update and discuss key findings obtained till date from in vitro and in vivo studies on fisetin, with special focus on its anti-cancer role. The molecular mechanism(s) described in the observed growth inhibitory effects of fisetin in different cancer cell types is also summarized. Moreover, an attempt is made to delineate the direction of future studies that could lead to the development of fisetin as a potent chemopreventive/chemotherapeutic agent against cancer.
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Abstract
For more than half a century free radical-induced alterations at cellular and organ levels have
been investigated as a probable underlying mechanism of a number of adverse health conditions. Consequently,
significant research efforts have been spent for discovering more effective and potent antioxidants /
free radical scavengers for treatment of these adverse conditions. Being by far the most used antioxidants
among natural and synthetic compounds, mono- and polyphenols have been the focus of both experimental
and computational research on mechanisms of free radical scavenging. Quantum chemical studies have provided
a significant amount of data on mechanisms of reactions between phenolic compounds and free radicals outlining a
number of properties with a key role for the radical scavenging activity and capacity of phenolics. The obtained quantum
chemical parameters together with other molecular descriptors have been used in quantitative structure-activity relationship
(QSAR) analyses for the design of new more effective phenolic antioxidants and for identification of the most useful
natural antioxidant phenolics. This review aims at presenting the state of the art in quantum chemical and QSAR studies
of phenolic antioxidants and at analysing the trends observed in the field in the last decade.
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Affiliation(s)
- Petko Alov
- Department of QSAR and Molecular Modelling, Institute of Biophysics and Biomedical Engineering, Bulgarian Academy of Sciences. 105 Acad. G. Bonchev St., 1113 Sofia, Bulgaria.
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Effect of environment pH on the photophysics of fisetin in solid lipid nanoparticles. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 153:305-10. [DOI: 10.1016/j.jphotobiol.2015.10.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Revised: 10/14/2015] [Accepted: 10/15/2015] [Indexed: 11/20/2022]
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The study of the oxidation of the natural flavonol fisetin confirmed quercetin oxidation mechanism. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.09.144] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Electronic structure of kaempferol–Cu2+ coordination compounds: a DFT, QTAIM and NBO study in the gas phase. Theor Chem Acc 2015. [DOI: 10.1007/s00214-015-1655-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Coelho D, Machado SA. New contribution in the study of phase formation in mixed alkanethiol self-assembled monolayers: a powerful tool for transducers design. Electrochim Acta 2014. [DOI: 10.1016/j.electacta.2014.07.112] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Energy requirements of the reactions of kaempferol and selected radical species in different media: towards the prediction of the possible radical scavenging mechanisms. Struct Chem 2014. [DOI: 10.1007/s11224-014-0453-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Kummer S, Ruth W, Kühn O, Kragl U. Comparison of Electrochemical Oxidation of Flavonols and Calculated Proton Affinity and Electron Transfer Enthalpy in Water. ELECTROANAL 2014. [DOI: 10.1002/elan.201300631] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Praveena R, Sadasivam K, Deepha V, Sivakumar R. Antioxidant potential of orientin: A combined experimental and DFT approach. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.01.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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37
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Bentz EN, Pomilio AB, Lobayan RM. Structure and electronic properties of (+)-catechin: aqueous solvent effects. J Mol Model 2014; 20:2105. [DOI: 10.1007/s00894-014-2105-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2013] [Accepted: 12/09/2013] [Indexed: 10/25/2022]
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Dimitrić Marković JM, Milenković D, Amić D, Mojović M, Pašti I, Marković ZS. The preferred radical scavenging mechanisms of fisetin and baicalein towards oxygen-centred radicals in polar protic and polar aprotic solvents. RSC Adv 2014. [DOI: 10.1039/c4ra02577f] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
The flavonoids fisetin and baicalein have been investigated for their ability to scavenge certain anion radicals.
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Affiliation(s)
| | - Dejan Milenković
- Bioengineering Research and Development Center
- 34000 Kragujevac, Republic of Serbia
| | - Dragan Amić
- Faculty of Agriculture
- The Josip Juraj Strossmayer University
- HR-31107 Osijek, Croatia
| | - Miloš Mojović
- Faculty of Physical Chemistry
- University of Belgrade
- 11000 Belgrade, Republic of Serbia
| | - Igor Pašti
- Faculty of Physical Chemistry
- University of Belgrade
- 11000 Belgrade, Republic of Serbia
| | - Zoran S. Marković
- Bioengineering Research and Development Center
- 34000 Kragujevac, Republic of Serbia
- Department of Chemical-Technological Sciences
- State University of Novi Pazar
- 36300 Novi Pazar, Republic of Serbia
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Chou RH, Hsieh SC, Yu YL, Huang MH, Huang YC, Hsieh YH. Fisetin inhibits migration and invasion of human cervical cancer cells by down-regulating urokinase plasminogen activator expression through suppressing the p38 MAPK-dependent NF-κB signaling pathway. PLoS One 2013; 8:e71983. [PMID: 23940799 PMCID: PMC3733924 DOI: 10.1371/journal.pone.0071983] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2013] [Accepted: 07/05/2013] [Indexed: 12/31/2022] Open
Abstract
Fisetin (3,3',4',7-tetrahydroxyflavone), a naturally occurring flavonoid, has been reported to inhibit proliferation and induce apoptosis in several cancer types. However, its effect on the anti-metastatic potential of cervical cancer cells remains unclear. In the present study, we found that fisetin inhibits the invasion and migration of cervical cancer cells. The expression and activity of urokinase plasminogen activator (uPA) was significantly suppressed by fisetin in a dose-dependent manner. We also demonstrated that fisetin reduces the phosphorylation of p38 MAPK, but not that of ERK1/2, JNK1/2, or AKT. Addition of a p38 MAPK inhibitor, SB203580, further enhanced the inhibitory effect of fisetin on the expression and activity of uPA and the invasion and motility in cervical cancer cells. Fisetin suppressed the TPA (tetradecanoylphorbol-13-acetate)-induced activation of p38 MAPK and uPA, and inhibited the TPA-enhanced migratory and invasive abilities. Furthermore, the promoter activity of the uPA gene was dramatically repressed by fisetin, which disrupted the nuclear translocation of NF-κB and its binding amount on the promoter of the uPA gene, and these suppressive effects could be further enhanced by SB203580. This study provides strong evidence for the molecular mechanism of fisetin in inhibiting the aggressive phenotypes by repression of uPA via interruption of p38 MAPK-dependent NF-κB signaling pathway in cervical cancer cells and thus contributes insight to the potential of using fisetin as a therapeutic strategy against cervical cancer by inhibiting migration and invasion.
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Affiliation(s)
- Ruey-Hwang Chou
- Graduate Institute of Cancer Biology and Center for Molecular Medicine, China Medical University, Taichung, Taiwan
- Department of Biotechnology, Asia University, Taichung, Taiwan
| | - Shu-Ching Hsieh
- Institute of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Yung-Luen Yu
- Graduate Institute of Cancer Biology and Center for Molecular Medicine, China Medical University, Taichung, Taiwan
- Department of Biotechnology, Asia University, Taichung, Taiwan
| | - Min-Hsien Huang
- Department of Rehabilitation Science, Department of Acupressure Technology, Jen-Teh Junior College of Medicine, Nursing and Management, Miaoli, County, Taiwan
| | - Yi-Chang Huang
- Institute of Biochemistry and Biotechnology, College of Medicine, Chung Shan Medical University, Taichung, Taiwan
| | - Yi-Hsien Hsieh
- Institute of Biochemistry and Biotechnology, College of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Biochemistry, School of Medicine, Chung Shan Medical University, Taichung, Taiwan
- Department of Clinical Laboratory, Chung Shan Medical University Hospital, Taichung, Taiwan
- * E-mail:
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Abstract
SIGNIFICANCE Diet-derived antioxidants are now being increasingly investigated for their health-promoting effects, including their role in the chemoprevention of cancer. In general, botanical antioxidants have received much attention, as they can be consumed for longer periods of time without any adverse effects. Flavonoids are a broadly distributed class of plant pigments that are regularly consumed in the human diet due to their abundance. One such flavonoid, fisetin (3,3',4',7-tetrahydroxyflavone), is found in various fruits and vegetables, such as strawberry, apple, persimmon, grape, onion, and cucumber. RECENT ADVANCES Several studies have demonstrated the effects of fisetin against numerous diseases. It is reported to have neurotrophic, anticarcinogenic, anti-inflammatory, and other health beneficial effects. CRITICAL ISSUES Although fisetin has been reported as an anticarcinogenic agent, further in-depth in vitro and in vivo studies are required to delineate the mechanistic basis of its observed effects. In this review article, we describe the multiple effects of fisetin with special emphasis on its anticancer activity as investigated in cell culture and animal models. FUTURE DIRECTIONS Additional research focused toward the identification of molecular targets could lead to the development of fisetin as a chemopreventive/chemotherapeutic agent against cancer and other diseases.
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Affiliation(s)
- Naghma Khan
- Department of Dermatology, University of Wisconsin, Madison, WI 53706, USA
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41
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Electrochemical oxidation of butein at glassy carbon electrodes. Bioelectrochemistry 2013; 91:62-9. [DOI: 10.1016/j.bioelechem.2013.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Revised: 01/06/2013] [Accepted: 01/08/2013] [Indexed: 11/24/2022]
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Gil ES, Couto RO. Flavonoid electrochemistry: a review on the electroanalytical applications. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2013. [DOI: 10.1590/s0102-695x2013005000031] [Citation(s) in RCA: 106] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhang D, Liu Y, Chu L, Wei Y, Wang D, Cai S, Zhou F, Ji B. Relationship Between the Structures of Flavonoids and Oxygen Radical Absorbance Capacity Values: A Quantum Chemical Analysis. J Phys Chem A 2013; 117:1784-94. [PMID: 23343226 DOI: 10.1021/jp307746c] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Di Zhang
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, People’s Republic of China
| | - Yixiang Liu
- Bioengineering School, Jimei University, Xiamen 361021, People’s Republic
of China
| | - Le Chu
- Jinan Fruit Research Institute, All China Federation of Supply & Marketing Co-operatives, Jinan 250014, People’s Republic of China
| | - Ying Wei
- Chinese National Research Institute of Food & Fermentation Industries, Beijing 100027, People’s Republic of China
| | - Dan Wang
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, People’s Republic of China
| | - Shengbao Cai
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, People’s Republic of China
| | - Feng Zhou
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, People’s Republic of China
| | - Baoping Ji
- Beijing Key Laboratory of Functional Food from Plant Resources, College of Food Science & Nutritional Engineering, China Agricultural University, Beijing 100083, People’s Republic of China
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Praveena R, Sadasivam K, Kumaresan R, Deepha V, Sivakumar R. Experimental and DFT studies on the antioxidant activity of a C-glycoside from Rhynchosia capitata. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 103:442-452. [PMID: 23246319 DOI: 10.1016/j.saa.2012.11.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2012] [Revised: 10/26/2012] [Accepted: 11/01/2012] [Indexed: 06/01/2023]
Abstract
Rhynchosia capitata (=Glycine capitata) Heyne ex roth, was found to possess polyphenolics including flavonoids, which acts as potential antioxidant. The study of ethanolic extract of roots and leaves reveals that the leaves possess high polyphenolics including flavonoids than roots. This was also confirmed by DPPH radical scavenging activity. Leaf powder of the plant was extracted with different solvents by soxhlet apparatus in the order of increasing polarity. The DPPH scavenging activity of methanol fraction was found to be high compared to the crude extract and other fractions. Nitric oxide scavenging activity was dominant in chloroform fraction compared to methanol fraction. Presence of flavonoids especially vitexin, a C-glycoside in methanol and chloroform fractions were confirmed by high pressure thin layer chromatography (HPTLC) analysis. The structural and molecular characteristics of naturally occurring flavonoid, vitexin was investigated in gas phase using density functional theory (DFT) approach with B3LYP/6-311G(d,p) level of theory. Analysis of bond dissociation enthalpy (BDE) reveals that the OH site that requires minimum energy for dissociation is 4'-OH from B-ring. To explore the radical scavenging activity of vitexin, the adiabatic ionization potential, electron affinity, hardness, softness, electronegativity and electrophilic index properties were computed and interpreted. The nonvalidity of Koopman's theorem has been verified by the computation of Eo and Ev energy magnitudes. Interestingly, from BDE calculations it was observed that BDE for 4'-OH, 5-OH and 7-OH are comparatively low for vitexin than its aglycone apigenin and this may be due to the presence of C-8 glucoside in vitexin. To substantiate this, plot of frontier molecular orbital and spin density distribution analysis for neutral and the corresponding radical species for the compound vitexin have been presented.
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Affiliation(s)
- R Praveena
- Department of Chemistry, Bannari Amman Institute of Technology (Autonomous), Sathyamangalam, Erode 638 401, Tamil Nadu, India
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Charge delocalization in Z-isomers of (4α→6″, 2α→O→1″)-phenylflavans with R=H, OH and OCH3. Effects on bond dissociation enthalpies and ionization potentials. COMPUT THEOR CHEM 2013. [DOI: 10.1016/j.comptc.2012.11.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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46
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Brdarić TP, Marković ZS, Milenković D, Dimitrić Marković JM. A joint application of vibrational spectroscopic and quantum mechanical methods in quantitative analysis of baicalein structure. MONATSHEFTE FUR CHEMIE 2012. [DOI: 10.1007/s00706-012-0805-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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47
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Vagánek A, Rimarčík J, Lukeš V, Klein E. On the energetics of homolytic and heterolytic OH bond cleavage in flavonoids. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.04.014] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Maza EM, Moressi MB, Fernández H, Zon MA. Electrochemical oxidation of fisetin: Studies related to its adsorption on glassy carbon electrodes. J Electroanal Chem (Lausanne) 2012. [DOI: 10.1016/j.jelechem.2012.04.022] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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49
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Marković Z, Milenković D, Đorović J, Dimitrić Marković JM, Stepanić V, Lučić B, Amić D. PM6 and DFT study of free radical scavenging activity of morin. Food Chem 2012; 134:1754-60. [PMID: 23442617 DOI: 10.1016/j.foodchem.2012.03.124] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2011] [Revised: 02/17/2012] [Accepted: 03/19/2012] [Indexed: 01/24/2023]
Abstract
Flavonoids have long been recognised for their general health-promoting properties, of which their antioxidant activity may play an important role. In this work, we have studied the properties of flavonoid morin using semiempirical and density functional theory (DFT) methods in order to validate the application of the recently developed parametric method 6 (PM6). Reaction enthalpies related to mechanisms of free radical scavenging by flavonoid morin were calculated by DFT and PM6 methods in gas-phase, water, DMSO and benzene. It has been shown that fast semiempirical PM6 method can mimic results obtained by means of more accurate time consuming DFT calculations. Thermodynamically favoured mechanism depends on reaction medium: SPLET (sequential proton loss electron transfer) is preferred in water and DMSO, and HAT (hydrogen atom transfer) is predominant in gas-phase. In benzene these two mechanisms are competitive.
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Affiliation(s)
- Zoran Marković
- Department of Chemical-Technological Sciences, State University of Novi Pazar, Vuka Karadžića bb, 36300 Novi Pazar, Serbia.
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Dimitrić Marković JM, Marković ZS, Milenković D, Jeremić S. Application of comparative vibrational spectroscopic and mechanistic studies in analysis of fisetin structure. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 83:120-129. [PMID: 21924948 DOI: 10.1016/j.saa.2011.08.001] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2011] [Revised: 07/29/2011] [Accepted: 08/02/2011] [Indexed: 05/31/2023]
Abstract
This paper addresses experimental and theoretical research in fisetin (2-(3,4-dihydroxyphenyl)-3,7-dihydroxychromen-4-one) structure by means of experimental IR and Raman spectroscopies and mechanistic calculations. Density Functional Theory calculations, with M05-2X functional and the 6-311+G (2df, p) basis set implemented in the Gaussian 09 package, are performed with the aim to support molecular structure, vibrational bands' positions and their intensities. Potential energy distribution (PED) values and the description of the largest vibrational contributions to the normal modes are calculated. The most intense bands appear in the 1650-1500 cm(-1) wavenumber region. This region involves a combination of the CO, C2C3 and C-C stretching vibrational modes. Most of the bands in the 1500-1000 cm(-1) range involve C-C stretching, O-C stretching and in-plane C-C-H, C-O-H, C-C-O and C-C-C bending vibrations of the rings. The region below 1000 cm(-1) is characteristic to the combination of in plane C-C-C-H, H-C-C-H, C-C-C-C, C-C-O-C and out of plane O-C-C-C, C-C-O-C, C-C-C-C torsional modes. The Raman spectra of baicalein and quercetin were used for qualitative comparison with fisetin spectrum and verification of band assignments. The applied detailed vibrational spectral analysis and the assignments of the bands, proposed on the basis of fundamentals, reproduced the experimental results with high degree of accuracy.
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