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A Preliminary Study of the Effect of Quercetin on Cytotoxicity, Apoptosis, and Stress Responses in Glioblastoma Cell Lines. Int J Mol Sci 2022; 23:ijms23031345. [PMID: 35163269 PMCID: PMC8836052 DOI: 10.3390/ijms23031345] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Revised: 01/19/2022] [Accepted: 01/20/2022] [Indexed: 02/04/2023] Open
Abstract
A growing body of evidence indicates that dietary polyphenols show protective effects against various cancers. However, little is known yet about their activity in brain tumors. Here we investigated the interaction of dietary flavonoid quercetin (QCT) with the human glioblastoma A172 and LBC3 cell lines. We demonstrated that QCT evoked cytotoxic effect in both tested cell lines. Microscopic observations, Annexin V-FITC/PI staining, and elevated expression and activity of caspase 3/7 showed that QCT caused predominantly apoptotic death of A172 cells. Further analyses confirmed enhanced ROS generation, deregulated expression of SOD1 and SOD2, depletion of ATP levels, and an overexpression of CHOP, suggesting the activation of oxidative stress and ER stress upon QCT exposure. Finally, elevated expression and activity of caspase 9, indicative of a mitochondrial pathway of apoptosis, was detected. Conversely, in LBC3 cells the pro-apoptotic effect was observed only after 24 h incubation with QCT, and a shift towards necrotic cell death was observed after 48 h of treatment. Altogether, our data indicate that exposure to QCT evoked cell death via activation of intrinsic pathway of apoptosis in A172 cells. These findings suggest that QCT is worth further investigation as a potential pharmacological agent in therapy of brain tumors.
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Echeverry C, Prunell G, Narbondo C, de Medina VS, Nadal X, Reyes-Parada M, Scorza C. A Comparative In Vitro Study of the Neuroprotective Effect Induced by Cannabidiol, Cannabigerol, and Their Respective Acid Forms: Relevance of the 5-HT 1A Receptors. Neurotox Res 2021; 39:335-348. [PMID: 32886342 DOI: 10.1007/s12640-020-00277-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 08/11/2020] [Accepted: 08/25/2020] [Indexed: 12/12/2022]
Abstract
Previous preclinical studies have demonstrated that cannabidiol (CBD) and cannabigerol (CBG), two non-psychotomimetic phytocannabinoids from Cannabis sativa, induce neuroprotective effects on toxic and neurodegenerative processes. However, a comparative study of both compounds has not been reported so far, and the targets involved in this effect remain unknown. The ability of CBD and CBG to attenuate the neurotoxicity induced by two insults involving oxidative stress (hydrogen peroxide, H2O2) and mitochondrial dysfunction (rotenone) was evaluated in neural cell cultures. The involvement of CB-1 and CB-2 or 5-HT1A receptors was investigated. The neuroprotective effect of their respective acids forms, cannabidiolic acid (CBDA) and cannabigerolic acid (CBGA), was also analyzed. MTT and immunocytochemistry assays were used to evaluate cell viability. No significant variation on cell viability was per se induced by the lower concentrations tested of CBD and CBG or CBDA and CBGA; however, high concentrations of CBD, CBDA, or CBGA were toxic since a 40-50% reduction of cell viability was observed. CBD and CBG showed neuroprotective effects against H2O2 or rotenone; however, both compounds were more effective in attenuating the rotenone-induced neurotoxicity. A high concentration of CBDA reduced the rotenone-induced neurotoxicity. WAY100635 (5-HT1A receptor antagonist) but not AM251 and AM630 (CB1 or CB2 receptor antagonists, respectively) significantly diminished the neuroprotective effect induced by CBG only against rotenone. Our results contribute to the understanding of the neuroprotective effect of CBD and CBG, showing differences with their acid forms, and also highlight the role of 5-HT1A receptors in the mechanisms of action of CBG.
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Affiliation(s)
- Carolina Echeverry
- Department of Neurochemistry, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), Avenida Italia 3318, CP 11600, Montevideo, Uruguay.
| | - Giselle Prunell
- Department of Neurochemistry, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), Avenida Italia 3318, CP 11600, Montevideo, Uruguay
| | - Camila Narbondo
- Department of Neurochemistry, Instituto de Investigaciones Biológicas Clemente Estable (IIBCE), Avenida Italia 3318, CP 11600, Montevideo, Uruguay
| | | | - Xavier Nadal
- EthnoPhytoTech Research & Consulting S.L.U., Sant Cugat del Valles, Spain
| | - Miguel Reyes-Parada
- Centro de Investigación Biomédica y Aplicada (CIBAP), Escuela de Medicina, Facultad de Ciencias Médicas, Universidad de Santiago de Chile, Santiago, Chile
- Facultad de Ciencias de la Salud, Universidad Autónoma de Chile, Santiago, Chile
| | - Cecilia Scorza
- Department of Experimental Neuropharmacology, IIBCE, Montevideo, Uruguay
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Shafaghat A, Shafaghatlonbar M. Two New Chalcone Glycoside Compounds from Viburnum lantana (Family Caprifoliaceae) and Antioxidant Activity of its Hydroalcoholic Extract. LETT ORG CHEM 2019. [DOI: 10.2174/1570178615666180925125213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the present study, two novel chalcone glycosides, trans-3-ethoxy-4-O-(glucopyranoside)
-2', 3', 4', 5', 6' -pentahydroxy chalcone (compound 1) and trans-3-methoxy-4-O-(glucopyranoside) -2',
3', 4', 5', 6' -pentahydroxy chalcone (compound 2) have been isolated from the leaves of Viburnum lantana
L. The structures were elucidated by using 1H-NMR, 13C-NMR, 2D-NMR such as HMQC,
HMBC and NOE experiments and UV-Vis, MS and IR spectra. The antioxidant property of hydroalcoholic
extract was evaluated by DPPH style. The results revealed that the leave extract possesses significant
antioxidant activity (IC50 = 52 µg/mL). This study indicates that hydroalcoholic extract of the
leaves from this species is an important source of chalcone and flavonoid derivatives, as well as of useful
natural antioxidants. These chalcone glycoside compounds were isolated for the first time from
V. lantana leaves.
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Affiliation(s)
- Ali Shafaghat
- Department of Chemistry, Khalkhal Branch, Islamic Azad University, Khalkhal, Iran
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Khan F, Niaz K, Maqbool F, Ismail Hassan F, Abdollahi M, Nagulapalli Venkata KC, Nabavi SM, Bishayee A. Molecular Targets Underlying the Anticancer Effects of Quercetin: An Update. Nutrients 2016; 8:nu8090529. [PMID: 27589790 PMCID: PMC5037516 DOI: 10.3390/nu8090529] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 08/18/2016] [Accepted: 08/22/2016] [Indexed: 12/13/2022] Open
Abstract
Quercetin, a medicinally important member of the flavonoid family, is one of the most prominent dietary antioxidants. It is present in a variety of foods—including fruits, vegetables, tea, wine, as well as other dietary supplements—and is responsible for various health benefits. Numerous pharmacological effects of quercetin include protection against diseases, such as osteoporosis, certain forms of malignant tumors, and pulmonary and cardiovascular disorders. Quercetin has the special ability of scavenging highly reactive species, such as hydrogen peroxide, superoxide anion, and hydroxyl radicals. These oxygen radicals are called reactive oxygen species, which can cause oxidative damage to cellular components, such as proteins, lipids, and deoxyribonucleic acid. Various oxygen radicals play important roles in pathophysiological and degenerative processes, such as aging. Subsequently, several studies have been performed to evaluate possible advantageous health effects of quercetin and to collect scientific evidence for these beneficial health claims. These studies also gather data in order to evaluate the exact mechanism(s) of action and toxicological effects of quercetin. The purpose of this review is to present and critically analyze molecular pathways underlying the anticancer effects of quercetin. Current limitations and future directions of research on this bioactive dietary polyphenol are also critically discussed.
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Affiliation(s)
- Fazlullah Khan
- Pharmaceutical Sciences Research Center, International Campus, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
| | - Kamal Niaz
- Pharmaceutical Sciences Research Center, International Campus, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
| | - Faheem Maqbool
- Pharmaceutical Sciences Research Center, International Campus, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
| | - Fatima Ismail Hassan
- Pharmaceutical Sciences Research Center, International Campus, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
| | - Mohammad Abdollahi
- Pharmaceutical Sciences Research Center, International Campus, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
- Department of Toxicology and Pharmacology, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran 1417614411, Iran.
| | - Kalyan C Nagulapalli Venkata
- Department of Pharmaceutical Sciences, College of Pharmacy, Larkin Health Sciences Institute, Miami, FL 33169, USA.
| | - Seyed Mohammad Nabavi
- Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran 1435916471, Iran.
| | - Anupam Bishayee
- Department of Pharmaceutical Sciences, College of Pharmacy, Larkin Health Sciences Institute, Miami, FL 33169, USA.
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Butchart C, Kyle J, McNeill G, Corley J, Gow AJ, Starr JM, Deary IJ. Flavonoid intake in relation to cognitive function in later life in the Lothian Birth Cohort 1936. Br J Nutr 2011; 106:141-8. [PMID: 21303571 DOI: 10.1017/s0007114510005738] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Previous studies have suggested a link between flavonoid intake and better cognitive function in later life but have not been able to control for possible confounding by prior intelligence quotient (IQ). The aim of the present study was to address this issue in a cross-sectional survey of 1091 men and women born in 1936, in whom IQ was measured at age 11 years. At the age of 70 years, participants carried out various neuropsychological tests and completed a FFQ. Associations between test scores and nutrient intake were assessed by linear regression with adjustment for potentially confounding variables. Total fruit, citrus fruits, apple and tea intakes were initially found to be associated with better scores in a variety of cognitive tests, but the associations were no longer statistically significant after adjusting for confounding factors, including childhood IQ. Flavanone intake was initially found to be associated with better scores in verbal fluency (P = 0·003, with standardised regression coefficient 0·10), but, again, the association was no longer statistically significant after adjusting for confounding factors. These findings do not support a role for flavonoids in the prevention of cognitive decline in later life. Studies of diet and cognitive function should include measurement of potential confounding variables, including prior IQ wherever possible.
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Affiliation(s)
- Catherine Butchart
- Department of Medicine for the Elderly, Woodend Hospital, Eday Road, Aberdeen AB15 6XS, UK.
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Abstract
This review focuses on recent developments in the use of natural products as therapeutics for Alzheimer's disease. The compounds span a diverse array of structural classes and are organized according to their mechanism of action, with the focus primarily on the major hypotheses. Overall, the review discusses more than 180 compounds and summarizes 400 references.
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Affiliation(s)
- Philip Williams
- Department of Chemistry, University of Hawaii at Manoa, Honolulu, Hawaii 96822, USA
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Echeverry C, Arredondo F, Abin-Carriquiry JA, Midiwo JO, Ochieng C, Kerubo L, Dajas F. Pretreatment with natural flavones and neuronal cell survival after oxidative stress: a structure-activity relationship study. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:2111-2115. [PMID: 20095615 DOI: 10.1021/jf902951v] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Quercetin shows structural features that have been related to the antioxidant potency of flavonoids and also shows neuroprotection in different models of oxidative death. Because only a few studies have focused on the flavonoid structural requirements for neuroprotection, this work evaluated the protective capacity of 13 flavones structurally related to quercetin, isolated from Kenyan plants, to rescue primary cerebellar granule neurons from death induced by a treatment with 24 h of hydrogen peroxide (150 microM). Each flavone (0-100 microM) was applied 24 h prior to the oxidative insult, and neuronal viability was evaluated by the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. Results suggest that the o-dihydroxy substitution in the B-ring is not necessary to afford neuroprotection and could be partly responsible for neurotoxic effects. Furthermore, the hydroxy substitutions in the positions C3 (C-ring) in C5 and C7 (A-ring) would be important for neuroprotection in this model.
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Affiliation(s)
- Carolina Echeverry
- Departmento de Neuroquimica, Instituto de Investigaciones Biologicas Clemente Estable, Montevideo, Uruguay.
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Halbwirth H. The creation and physiological relevance of divergent hydroxylation patterns in the flavonoid pathway. Int J Mol Sci 2010; 11:595-621. [PMID: 20386656 PMCID: PMC2852856 DOI: 10.3390/ijms11020595] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2009] [Revised: 01/27/2010] [Accepted: 01/28/2010] [Indexed: 11/25/2022] Open
Abstract
Flavonoids and biochemically-related chalcones are important secondary metabolites, which are ubiquitously present in plants and therefore also in human food. They fulfill a broad range of physiological functions in planta and there are numerous reports about their physiological relevance for humans. Flavonoids have in common a basic C(6)-C(3)-C(6) skeleton structure consisting of two aromatic rings (A and B) and a heterocyclic ring (C) containing one oxygen atom, whereas chalcones, as the intermediates in the formation of flavonoids, have not yet established the heterocyclic C-ring. Flavonoids are grouped into eight different classes, according to the oxidative status of the C-ring. The large number of divergent chalcones and flavonoid structures is from the extensive modification of the basic molecules. The hydroxylation pattern influences physiological properties such as light absorption and antioxidative activity, which is the base for many beneficial health effects of flavonoids. In some cases antiinfective properties are also effected.
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Affiliation(s)
- Heidi Halbwirth
- Institut für Verfahrenstechnik, Umwelttechnik und Technische Biowissenschaften, Technische Universität Wien, Getreidemarkt 9/1665, A-1060 Wien, Austria; E-Mail:
; Tel.: +43-1-58801-17311; Fax: +43-1-58801-17399
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Wong YC, Zhang L, Lin G, Zuo Z. Structure–activity relationships of the glucuronidation of flavonoids by human glucuronosyltransferases. Expert Opin Drug Metab Toxicol 2009; 5:1399-419. [DOI: 10.1517/17425250903179300] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Khan MTH, Orhan I, Senol FS, Kartal M, Sener B, Dvorská M, Smejkal K, Slapetová T. Cholinesterase inhibitory activities of some flavonoid derivatives and chosen xanthone and their molecular docking studies. Chem Biol Interact 2009; 181:383-9. [PMID: 19596285 DOI: 10.1016/j.cbi.2009.06.024] [Citation(s) in RCA: 147] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2009] [Revised: 06/28/2009] [Accepted: 06/29/2009] [Indexed: 10/20/2022]
Abstract
Flavonoids are one of the largest classes of plant secondary metabolites and are known to possess a number of significant biological activities for human health. In this study, we examined in vitro acetylcholinesterase (AChE) and butyrylcholinesterase (BChE) inhibitory activities of four flavonoid derivatives--quercetin, rutin, kaempferol 3-O-beta-D-galactoside and macluraxanthone. The in vitro results showed that quercetin and macluraxanthone displayed a concentration-dependant inhibition of AChE and BChE. Macluraxanthone showed to be the most potent and specific inhibitor of both the enzymes having the IC(50) values of 8.47 and 29.8 microM, respectively. The enzyme kinetic studies revealed that quercetin inhibited both the enzymes in competitive manner, whereas the mode of inhibition of macluraxanthone was non-competitive against AChE and competitive against BChE. The inhibitory profiles of the compounds have been compared with standard AChE inhibitor galanthamine. To get insight of the intermolecular interactions, the molecular docking studies of these two compounds were performed at the active site 3D space of both the enzymes, using ICM-Dock module. Docking studies exhibited that macluraxanthone binds much more tightly with both the enzymes than quercetin. The calculated docking and binding energies also supported the in vitro inhibitory profiles (IC(50) values). Both the compounds showed several strong hydrogen bonds to several important amino acid residues of both the enzymes. A number of hydrophobic interactions could also explain the potency of the compounds to inhibit AChE and BChE.
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Affiliation(s)
- Mahmud Tareq Hassan Khan
- Department of Pharmacology, Institute of Medical Biology, University of Tromsø, 9037 Tromsø, Norway.
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Fiorentino A, D'Abrosca B, Pacifico S, Golino A, Mastellone C, Oriano P, Monaco P. Reactive oxygen species scavenging activity of flavone glycosides from Melilotus neapolitana. Molecules 2007; 12:263-70. [PMID: 17846577 PMCID: PMC6149392 DOI: 10.3390/12020263] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2007] [Revised: 02/13/2007] [Accepted: 02/27/2007] [Indexed: 11/17/2022] Open
Abstract
One new and six known flavone glycosides were isolated from the MeOH extract of Melilotus neapolitana Ten. The new compound, identified as 7-O-beta-D-glucopyranosyloxy-4',5-dihydroxy-3-[O-alpha-L-rhamnopyranosyl-(1-->6)-3-O-beta-D-glucopyranosyloxy]flavone (1) by 1D and 2D NMR techniques and mass spectra, was isolated along with kaempferol-3-O-rutinoside (2), kaempferol-3-O-glucoside (3), rutin (4), quercetin-3-O-glucoside (5), isorhamnetin-3-O-rutinoside (6), and isorhamnetin-3-O-glucoside (7). The antioxidant and radical scavenging activities of these compounds and the whole crude methanol extract were evaluated. The organic extract can inhibit MDA marker's synthesis by 57%. All the metabolites displayed good reducing power, with the kaempferol (2,3) and isorhamnetin derivatives (6,7) being less active than the corresponding quercetin derivatives 4,5.
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Affiliation(s)
- Antonio Fiorentino
- Dipartimento di Scienze della Vita, Seconda Università degli Studi di Napoli, I-81100 Caserta, Italy.
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