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Slighoua M, Amrati FEZ, Chebaibi M, Mahdi I, Al Kamaly O, El Ouahdani K, Drioiche A, Saleh A, Bousta D. Quercetin and Ferulic Acid Elicit Estrogenic Activities In Vivo and In Silico. Molecules 2023; 28:5112. [PMID: 37446770 DOI: 10.3390/molecules28135112] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 07/15/2023] Open
Abstract
In this study, we examined the sub-acute toxicity of quercetin and ferulic acid and evaluated their effects on protein, cholesterol, and estrogen levels in vivo. Six groups of female Wistar rats were fed by gavage. The first and second groups represent the positive (Clomiphene citrate 10 mg/kg) and negative (NaCl 0.9%) control groups, while the other groups received quercetin and ferulic acid at doses of 5 and 10 mg/kg/day for 28 days. The sub-acute toxicity was monitored by examining the weights, biochemical parameters (AST, ALT, ALP, urea, and CREA), and histological changes in the kidneys and liver of the treated animals. Furthermore, the in vivo estrogenic effects were studied in terms of the serum and ovarian cholesterol levels, serum estradiol, and uterine proteins. Finally, Docking studies were conducted to evaluate the binding affinity of quercetin and ferulic acid for alpha and beta estrogen receptors. Results showed that both compounds were devoid of any signs of nephrotoxicity or hepatotoxicity. Additionally, quercetin and ferulic acid caused significant estrogenic effects evidenced by an increase of 8.7 to 22.48% in serum estradiol, though to a lesser amount than in the reference drug-treated group (64.21%). Moreover, the two compounds decreased the serum cholesterol levels (12.26-32.75%) as well as the ovarian cholesterol level (11.9% to 41.50%) compared to the negative control. The molecular docking in estrogen alpha and estrogen beta active sites showed high affinity of quercetin (-10.444 kcal/mol for estrogen alpha and -10.662 kcal/mol for estrogen beta) and ferulic acid (-6.377 kcal/mol for estrogen alpha and -6.3 kcal/mol for estrogen beta) to these receptors. This study provides promising insights into the potential use of quercetin as a therapeutic agent for the management of female fertility issues.
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Affiliation(s)
- Meryem Slighoua
- Laboratory of Biotechnology, Environment, Agro-Food, and Health (LBEAS), Faculty of Sciences, University 7 Sidi-Mohamed-Ben-Abdellah (USMBA), Fez 30050, Morocco
| | - Fatima Ez-Zahra Amrati
- Laboratory of Biotechnology, Environment, Agro-Food, and Health (LBEAS), Faculty of Sciences, University 7 Sidi-Mohamed-Ben-Abdellah (USMBA), Fez 30050, Morocco
| | - Mohamed Chebaibi
- Biomedical and Translational Research Laboratory, Faculty of Medicine and Pharmacy of Fez, Sidi Mohamed Ben Abdellah University, Fez 30000, Morocco
| | - Ismail Mahdi
- AgroBioSciences Research Division, College for Sustainable Agriculture and Environmental Science, Mohammed VI Polytechnic University, Lot 660-Hay Moulay Rachid, Ben Guerir 43150, Morocco
| | - Omkulthom Al Kamaly
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Khadija El Ouahdani
- Laboratory of Biotechnology, Environment, Agro-Food, and Health (LBEAS), Faculty of Sciences, University 7 Sidi-Mohamed-Ben-Abdellah (USMBA), Fez 30050, Morocco
| | - Aziz Drioiche
- Laboratory of Innovative Materials and Biotechnology of Natural Resources, Faculty of Sciences, Moulay 19 Ismail University, Meknes 50070, Morocco
| | - Asmaa Saleh
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Dalila Bousta
- Laboratory of Biotechnology, Environment, Agro-Food, and Health (LBEAS), Faculty of Sciences, University 7 Sidi-Mohamed-Ben-Abdellah (USMBA), Fez 30050, Morocco
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Speisky H, Shahidi F, Costa de Camargo A, Fuentes J. Revisiting the Oxidation of Flavonoids: Loss, Conservation or Enhancement of Their Antioxidant Properties. Antioxidants (Basel) 2022; 11:antiox11010133. [PMID: 35052636 PMCID: PMC8772813 DOI: 10.3390/antiox11010133] [Citation(s) in RCA: 71] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 12/27/2021] [Accepted: 12/29/2021] [Indexed: 02/06/2023] Open
Abstract
Flavonoids display a broad range of health-promoting bioactivities. Among these, their capacity to act as antioxidants has remained most prominent. The canonical reactive oxygen species (ROS)-scavenging mode of the antioxidant action of flavonoids relies on the high susceptibility of their phenolic moieties to undergo oxidation. As a consequence, upon reaction with ROS, the antioxidant capacity of flavonoids is severely compromised. Other phenol-compromising reactions, such as those involved in the biotransformation of flavonoids, can also markedly affect their antioxidant properties. In recent years, however, increasing evidence has indicated that, at least for some flavonoids, the oxidation of such residues can in fact markedly enhance their original antioxidant properties. In such apparent paradoxical cases, the antioxidant activity arises from the pro-oxidant and/or electrophilic character of some of their oxidation-derived metabolites and is exerted by activating the Nrf2–Keap1 pathway, which upregulates the cell’s endogenous antioxidant capacity, and/or, by preventing the activation of the pro-oxidant and pro-inflammatory NF-κB pathway. This review focuses on the effects that the oxidative and/or non-oxidative modification of the phenolic groups of flavonoids may have on the ability of the resulting metabolites to promote direct and/or indirect antioxidant actions. Considering the case of a metabolite resulting from the oxidation of quercetin, we offer a comprehensive description of the evidence that increasingly supports the concept that, in the case of certain flavonoids, the oxidation of phenolics emerges as a mechanism that markedly amplifies their original antioxidant properties. An overlooked topic of great phytomedicine potential is thus unraveled.
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Affiliation(s)
- Hernan Speisky
- Laboratory of Antioxidants, Nutrition and Food Technology Institute, University of Chile, Santiago 7810000, Chile;
- Correspondence: (H.S.); (J.F.); Tel.: +56-(2)-2978-1519 (H.S.)
| | - Fereidoon Shahidi
- Department of Biochemistry, Memorial University of Newfoundland, St. John’s, NL A1B 3X9, Canada;
| | - Adriano Costa de Camargo
- Laboratory of Antioxidants, Nutrition and Food Technology Institute, University of Chile, Santiago 7810000, Chile;
| | - Jocelyn Fuentes
- Laboratory of Antioxidants, Nutrition and Food Technology Institute, University of Chile, Santiago 7810000, Chile;
- Faculty of Medicine, School of Kinesiology, Universidad Finis Terrae, Santiago 7501015, Chile
- Correspondence: (H.S.); (J.F.); Tel.: +56-(2)-2978-1519 (H.S.)
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Ha AT, Rahmawati L, You L, Hossain MA, Kim JH, Cho JY. Anti-Inflammatory, Antioxidant, Moisturizing, and Antimelanogenesis Effects of Quercetin 3-O-β-D-Glucuronide in Human Keratinocytes and Melanoma Cells via Activation of NF-κB and AP-1 Pathways. Int J Mol Sci 2021; 23:ijms23010433. [PMID: 35008862 PMCID: PMC8745180 DOI: 10.3390/ijms23010433] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 12/26/2021] [Accepted: 12/29/2021] [Indexed: 12/19/2022] Open
Abstract
Quercetin 3-O-β-D-glucuronide (Q-3-G), the glucuronide conjugate of quercetin, has been reported as having anti-inflammatory properties in the lipopolysaccharide-stimulated macrophages, as well as anticancer and antioxidant properties. Unlike quercetin, which has been extensively described to possess a wide range of pharmacological activities including skin protective effects, the pharmacological benefits and mechanisms Q-3-G in the skin remained to be elucidated. This study focused on characterizing the skin protective properties, including anti-inflammatory and antioxidant properties, of Q-3-G against UVB-induced or H2O2-induced oxidative stress, the hydration effects, and antimelanogenesis activities using human keratinocytes (HaCaT) and melanoma (B16F10) cells. Q-3-G down-regulated the expression of the pro-inflammatory gene and cytokine such as cyclooxygenase-2 (COX-2) and tumor necrosis factor (TNF)-α in H2O2 or UVB-irradiated HaCaT cells. We also showed that Q-3-G exhibits an antioxidant effect using free radical scavenging assays, flow cytometry, and an increased expression of nuclear factor erythroid 2- related factor 2 (Nrf2). Q-3-G reduced melanin production in α-melanocyte-stimulating hormone (α-MSH)-induced B16F10 cells. The hydration effects and mechanisms of Q-3-G were examined by evaluating the moisturizing factor-related genes, such as transglutaminase-1 (TGM-1), filaggrin (FLG), and hyaluronic acid synthase (HAS)-1. In addition, Q-3-G increased the phosphorylation of c-Jun, Jun N-terminal kinase (JNK), Mitogen-activated protein kinase (MAPK) kinase 4 (MKK4), and TAK1, involved in the MAPKs/AP-1 pathway, and the phosphorylation of IκBα, IκB kinase (IKK)-α, Akt, and Src, involved in the NF-κB pathway. Taken together, we have demonstrated that Q-3-G exerts anti-inflammatory, antioxidant, moisturizing, and antimelanogenesis properties in human keratinocytes and melanoma cells through NF-κB and AP-1 pathways.
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Affiliation(s)
- Anh Thu Ha
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (A.T.H.); (L.R.); (L.Y.)
| | - Laily Rahmawati
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (A.T.H.); (L.R.); (L.Y.)
| | - Long You
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (A.T.H.); (L.R.); (L.Y.)
| | - Mohammad Amjad Hossain
- Department of Veterinary Physiology, College of Medicine, Chonbuk National University, Iksan 54596, Korea;
| | - Jong-Hoon Kim
- Department of Veterinary Physiology, College of Medicine, Chonbuk National University, Iksan 54596, Korea;
- Correspondence: (J.-H.K.); (J.Y.C.); Tel.: +82-63-270-2563 (J.-H.K.); +82-31-290-7868 (J.Y.C.)
| | - Jae Youl Cho
- Department of Integrative Biotechnology, Sungkyunkwan University, Suwon 16419, Korea; (A.T.H.); (L.R.); (L.Y.)
- Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University, Suwon 16419, Korea
- Correspondence: (J.-H.K.); (J.Y.C.); Tel.: +82-63-270-2563 (J.-H.K.); +82-31-290-7868 (J.Y.C.)
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Tobeiha M, Rajabi A, Raisi A, Mohajeri M, Yazdi SM, Davoodvandi A, Aslanbeigi F, Vaziri M, Hamblin MR, Mirzaei H. Potential of natural products in osteosarcoma treatment: Focus on molecular mechanisms. Biomed Pharmacother 2021; 144:112257. [PMID: 34688081 DOI: 10.1016/j.biopha.2021.112257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/21/2021] [Accepted: 09/26/2021] [Indexed: 02/07/2023] Open
Abstract
Osteosarcoma is the most frequent type of bone cancer found in children and adolescents, and commonly arises in the metaphyseal region of tubular long bones. Standard therapeutic approaches, such as surgery, chemotherapy, and radiation therapy, are used in the management of osteosarcoma. In recent years, the mortality rate of osteosarcoma has decreased due to advances in treatment methods. Today, the scientific community is investigating the use of different naturally derived active principles against various types of cancer. Natural bioactive compounds can function against cancer cells in two ways. Firstly they can act as classical cytotoxic compounds by non-specifically affecting macromolecules, such as DNA, enzymes, and microtubules, which are also expressed in normal proliferating cells, but to a greater extent by cancer cells. Secondly, they can act against oncogenic signal transduction pathways, many of which are activated in cancer cells. Some bioactive plant-derived agents are gaining increasing attention because of their anti-cancer properties. Moreover, some naturally-derived compounds can significantly promote the effectiveness of standard chemotherapy drugs, and in certain cases are able to ameliorate drug-induced adverse effects caused by chemotherapy. In the present review we summarize the effects of various naturally-occurring bioactive compounds against osteosarcoma.
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Affiliation(s)
- Mohammad Tobeiha
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran; Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Ali Rajabi
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran; Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Arash Raisi
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran; Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - Mahshad Mohajeri
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Amirhossein Davoodvandi
- Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran; Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Fatemeh Aslanbeigi
- School of Medicine, Kashan University of Medical Sciences, Kashan, Iran; Student Research Committee, Kashan University of Medical Sciences, Kashan, Iran
| | - MohamadSadegh Vaziri
- Student Research Committee, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
| | - Michael R Hamblin
- Laser Research Centre, Faculty of Health Science, University of Johannesburg, Doornfontein 2028, South Africa.
| | - Hamed Mirzaei
- Research Center for Biochemistry and Nutrition in Metabolic Diseases, Institute for Basic Sciences, Kashan University of Medical Sciences, Kashan, Iran.
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Tudorachi NB, Totu EE, Fifere A, Ardeleanu V, Mocanu V, Mircea C, Isildak I, Smilkov K, Cărăuşu EM. The Implication of Reactive Oxygen Species and Antioxidants in Knee Osteoarthritis. Antioxidants (Basel) 2021; 10:985. [PMID: 34205576 PMCID: PMC8233827 DOI: 10.3390/antiox10060985] [Citation(s) in RCA: 45] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2021] [Revised: 06/11/2021] [Accepted: 06/17/2021] [Indexed: 12/16/2022] Open
Abstract
Knee osteoarthritis (KOA) is a chronic multifactorial pathology and a current and essential challenge for public health, with a negative impact on the geriatric patient's quality of life. The pathophysiology is not fully known; therefore, no specific treatment has been found to date. The increase in the number of newly diagnosed cases of KOA is worrying, and it is essential to reduce the risk factors and detect those with a protective role in this context. The destructive effects of free radicals consist of the acceleration of chondrosenescence and apoptosis. Among other risk factors, the influence of redox imbalance on the homeostasis of the osteoarticular system is highlighted. The evolution of KOA can be correlated with oxidative stress markers or antioxidant status. These factors reveal the importance of maintaining a redox balance for the joints and the whole body's health, emphasizing the importance of an individualized therapeutic approach based on antioxidant effects. This paper aims to present an updated picture of the implications of reactive oxygen species (ROS) in KOA from pathophysiological and biochemical perspectives, focusing on antioxidant systems that could establish the premises for appropriate treatment to restore the redox balance and improve the condition of patients with KOA.
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Affiliation(s)
- Nicoleta Bianca Tudorachi
- Faculty of Medicine, “Ovidius” University of Constanța, Mamaia Boulevard 124, 900527 Constanța, Romania; (N.B.T.); (V.A.)
| | - Eugenia Eftimie Totu
- Faculty of Applied Chemistry and Material Science, University Politehnica of Bucharest, 1–5 Polizu Street, 011061 Bucharest, Romania
| | - Adrian Fifere
- Centre of Advanced Research in Bionanoconjugates and Biopolymers Department, “Petru Poni” Institute of Macromolecular Chemistry, 41A Grigore Ghica Voda Alley, 700487 Iasi, Romania
| | - Valeriu Ardeleanu
- Faculty of Medicine, “Ovidius” University of Constanța, Mamaia Boulevard 124, 900527 Constanța, Romania; (N.B.T.); (V.A.)
| | - Veronica Mocanu
- Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania; (V.M.); (C.M.)
| | - Cornelia Mircea
- Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, 700115 Iasi, Romania; (V.M.); (C.M.)
| | - Ibrahim Isildak
- Faculty of Chemistry-Metallurgy, Department of Bioengineering, Yildiz Technical University, Istanbul 34220, Turkey;
| | - Katarina Smilkov
- Faculty of Medical Sciences, Division of Pharmacy, Department of Applied Pharmacy, Goce Delcev University, Krste Misirkov Street, No. 10-A, 2000 Stip, North Macedonia;
| | - Elena Mihaela Cărăuşu
- Faculty of Dental Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, “Nicolae Leon” Building, 13 Grigore Ghica Street, 700259 Iasi, Romania;
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Mohamed MAEH, Mohammed HS, Mostafa SA, Ibrahim MT. Protective effects of Saraca indica L. leaves extract (family Fabaceae) against gamma irradiation induced injury in the kidney of female albino rats. ENVIRONMENTAL TOXICOLOGY 2021; 36:506-519. [PMID: 33166054 DOI: 10.1002/tox.23056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2019] [Revised: 08/25/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
This work was designed to estimate the protective effect of Saraca indica L. leaves ethanolic exract against γ-irradiation induced renal damage in rats. Phytochemical examinations of S. indica L. leaves extract resulted in the separation of three flavanone glycosides: Astilibin (1), Neoastilbin (2), and Eriodictyol-7-O-α-l-rhamnopyranoside (3); two flavonols: Quercetin (4) and Quercetin-3-O-α-l-arabinopyranosyl-(1'''-6'')-O-β-D-galactopyranoside (5) in addition of Gallic acid (6) and methyl gallate (7). Their structures elucidated by chemical evidences and spectroscopic analysis (1 and 2D-NMR, -ESI-MS, UV). Female rats were used and classified into: control, Ext (200 mg/kg body wt/day orally for 7 days), IRR (8Gy), Ext + IRR, and Sily+IRR groups (received silymarin 50 mg/kg b.wt orally as reference drug). Results showed that S. indica L. leaves extract ameliorated the kidney function tests, hs-CRP, IL-1β, ACE, TNF-α, GSH, and MDA as well as, decreased the histopathological changes of kidney. In conclusion, S. indica L. leaves extract had a renoprotective activity against irradiation induced renal injury due to its flavononid contents.
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Affiliation(s)
- Marwa Abd El Hameed Mohamed
- Drug Radiation Research Department, National Center for Radiation Research and Technology (NCRRT), Egyptian Atomic Energy Authority (AEA), Cairo, Egypt
| | - Hala Sh Mohammed
- Pharmcognosy Department, Faculty of Pharmacy (Girls), Al Azhar University, Cairo, Egypt
| | - Shaimaa Ali Mostafa
- Analyist at Central Health Labs-Ministry of Health and Population (MOHP), Cairo, Egypt
| | - Magda Tohamy Ibrahim
- Pharmcognosy Department, Faculty of Pharmacy (Girls), Al Azhar University, Cairo, Egypt
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Gaur PK. Nanosuspension of flavonoid-rich fraction from Psidium guajava Linn for improved type 2-diabetes potential. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102358] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Hu T, Shi JJ, Fang J, Wang Q, Chen YB, Zhang SJ. Quercetin ameliorates diabetic encephalopathy through SIRT1/ER stress pathway in db/db mice. Aging (Albany NY) 2020; 12:7015-7029. [PMID: 32312941 PMCID: PMC7202537 DOI: 10.18632/aging.103059] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Accepted: 01/27/2020] [Indexed: 01/01/2023]
Abstract
Studies have shown that diabetes is an important risk factor for cognitive dysfunction, also called diabetic encephalopathy (DE). Quercetin has been reported to be effective in improving cognitive dysfunction in DE. But its detailed mechanism is still ambiguous. In this study, we used db/db mice to investigate whether quercetin could activate SIRT1 and inhibit ER pathways to improve DE. Behavioral tests (Morris water maze and new objects) showed that quercetin (70 mg/kg) can effectively improve the learning and memory ability in db/db mice. OGTT and ITT tests indicated that quercetin could alleviate impaired glucose tolerance and insulin resistance in db/db mice. Western blot analysis and Nissl staining showed that quercetin can improve the expression of nerve and synapse-associated proteins (PSD93, PSD95, NGF and BDNF) and inhibit neurodegeneration. Meanwhile, quercetin up-regulates SIRT1 protein expression and inhibits the expression of ER signaling pathway-related proteins (PERK, IRE-1α, ATF6, eIF2α, BIP and PDI). In addition, oxidative stress levels were significantly reduced after quercetin treatment. In conclusion, current experimental results indicated that SIRT1/ER stress is a promising mechanism involved in quercetin-treated diabetic encephalopathy.
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Affiliation(s)
- Tian Hu
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jing-Jing Shi
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Jiansong Fang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Qi Wang
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Yun-Bo Chen
- Science and Technology Innovation Center, Guangzhou University of Chinese Medicine, Guangzhou, China
- Institute of Clinical Pharmacology, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Shi-Jie Zhang
- Department of Neurology, The Second Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
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Ben Hsouna A, Dhibi S, Dhifi W, Ben Saad R, Brini F, Hfaidh N, Almeida JRGDS, Mnif W. Lobularia maritima leave extract, a nutraceutical agent with antioxidant activity, protects against CCl4-induced liver injury in mice. Drug Chem Toxicol 2020; 45:604-616. [DOI: 10.1080/01480545.2020.1742730] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Anis Ben Hsouna
- Department of Life Sciences, Faculty of Sciences of Gafsa, Gafsa, Tunisia
- Centre of Biotechnology of Sfax, Biotechnology and Plant Improvement Laboratory, Sfax, Tunisia
| | - Sabah Dhibi
- Laboratory of Animal Ecophysiology, Faculty of Sciences, University of Gafsa, Gafsa, Tunisia
| | - Wissal Dhifi
- Laboratory of Physiopathology, Alimentation and Biomolecules, PAB, LR17ES03, Higher Institute of Biotechnology of Sidi Thabet, BiotechPole of Sidi Thabet, University of Manouba, Ariana, Tunisia
| | - Rania Ben Saad
- Centre of Biotechnology of Sfax, Biotechnology and Plant Improvement Laboratory, Sfax, Tunisia
| | - Faical Brini
- Centre of Biotechnology of Sfax, Biotechnology and Plant Improvement Laboratory, Sfax, Tunisia
| | - Najla Hfaidh
- Laboratory of Animal Ecophysiology, Faculty of Sciences, University of Gafsa, Gafsa, Tunisia
| | | | - Wissem Mnif
- Department of Chemistry, Faculty of Sciences and Arts in Balgarn, University of Bisha, Bisha, Saudi Arabia
- Laboratory of Biotechnology and Valorisation of Bio-GeoRessources, BVBGR, LR11ES31, Higher Institute of Biotechnology of Sidi Thabet, BiotechPole of Sidi Thabet, University of Manouba, Ariana, Tunisia
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Suppression of Light-Induced Retinal Degeneration by Quercetin via the AP-1 Pathway in Rats. Antioxidants (Basel) 2019; 8:antiox8040079. [PMID: 30934771 PMCID: PMC6523921 DOI: 10.3390/antiox8040079] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 03/18/2019] [Accepted: 03/25/2019] [Indexed: 12/20/2022] Open
Abstract
We examined the cytoprotective effect of quercetin via activator protein (AP-1) and the heat shock protein 70 (Hsp70) pathway against light-induced retinal degeneration in rats. Quercetin was administered intraperitoneally to Sprague-Dawley rats for seven days before light exposure to intense white fluorescent light (3000 lux) for 24 h. Light-induced retinal damage was determined by the number of rows of photoreceptor cell nuclei, the microstructures of the rod outer segments and retinal pigment epithelium, and terminal deoxynucleotidyl transferase (TdT)-mediated 2′-Deoxyuridine-5′-triphosphate (dUTP) nick end labeling. To elucidate the cytoprotective mechanism of quercetin, expression levels were measured in the rat retinas of 8-hydroxy-deoxyguanosine (8-OHdG), a marker of oxidative stress; Hsp70; and transcription factor AP-1 transcription activity. Pretreatment with quercetin inhibited light-induced photoreceptor cellular apoptosis and subsequent retinal degeneration in rats. 8-OHdG and Hsp70 protein expressions were up-regulated markedly by light exposure and suppressed by quercetin pretreatment. The results of an electrophoretic mobility shift assay showed that AP-1-binding activity was activated by light exposure, and binding of c-Fos and c-Jun, but not JunB, mediated the binding activity. Intraperitoneal administration of quercetin decreases photooxidative damage in the retina and mediates cytoprotection against light-induced photoreceptor cell degeneration in rats. Suppression of the heterodimeric combination of c-Jun and c-Fos proteins at the AP-1 binding site is highly involved in quercetin-mediated cytoprotection.
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Ghaniei A, Eslami M, Zadeh Hashem E, Rezapour R, Talebi A. Quercetin attenuates H 2 O 2 -induced toxicity of rooster semen during liquid storage at 4°C. J Anim Physiol Anim Nutr (Berl) 2019; 103:713-722. [PMID: 30816608 DOI: 10.1111/jpn.13056] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2018] [Revised: 11/24/2018] [Accepted: 12/17/2018] [Indexed: 12/21/2022]
Abstract
Current study was carried out to examine the protective effects of quercetin against toxicity induced by hydrogen peroxide in rooster semen in vitro. Semen samples were collected from ten roosters (Ross 308 broiler breeder males, 32 weeks old) twice a week by abdominal massage method. Samples with ≥70% progressive motility were selected, pooled, diluted and used for the study. Experimental groups consisted of negative control, control that received solvent of quercetin, H2 O2 (40 μM) and combination groups which incubated with constant dose of H2 O2 (40 μM) plus various levels of quercetin (20, 40 and 80 μM). Measurement of total hydroperoxide (HPO), malondialdehyde (MDA), nitric oxide (NO), total antioxidant capacity (TAC) and superoxide dismutase activity as well as routine sperm tests were done at 0, 24 and 48 hr of storage at 4°C. Results revealed that exposure to hydrogen peroxide significantly increased HPO (138.43 ± 7.32 vs. 66.08 ± 3.97 μmol/g protein), MDA (7.21 ± 0.08 vs. 5.71 ± 2.16 μmol/g protein) and NO (0.367 ± 0.013 vs. 0.215 ± 0.011 μmol/g protein) levels and decreased sperm progressive motility (27.28 ± 1.21 vs. 47.49 ± 1.29%), and amounts of TAC (11.49 ± 0.39 vs. 15.70 ± 0.79 mmol/g protein) compared to control at 24 hr (p < 0.05). Changes at mentioned variables were repeated at 48 hr of storage. Also, co-administration of quercetin (especially at 40 and 80 μM) with hydrogen peroxide restored the toxic effects of hydrogen peroxide on rooster semen parameters such as primary and secondary lipid peroxidative indicators and other evaluated variables. The study concluded that rooster semen enrichment with quercetin would protect lipid peroxidative and nitrosative hydrogen peroxide-mediated damage during cold liquid storage of rooster semen.
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Affiliation(s)
- Abolfazl Ghaniei
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Mohsen Eslami
- Department of Theriogenology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Elham Zadeh Hashem
- Department of Basic Sciences, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Reza Rezapour
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - Alireza Talebi
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
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12
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Luca SV, Macovei I, Bujor A, Miron A, Skalicka-Woźniak K, Aprotosoaie AC, Trifan A. Bioactivity of dietary polyphenols: The role of metabolites. Crit Rev Food Sci Nutr 2019; 60:626-659. [PMID: 30614249 DOI: 10.1080/10408398.2018.1546669] [Citation(s) in RCA: 353] [Impact Index Per Article: 70.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A polyphenol-rich diet protects against chronic pathologies by modulating numerous physiological processes, such as cellular redox potential, enzymatic activity, cell proliferation and signaling transduction pathways. However, polyphenols have a low oral bioavailability mainly due to an extensive biotransformation mediated by phase I and phase II reactions in enterocytes and liver but also by gut microbiota. Despite low oral bioavailability, most polyphenols proved significant biological effects which brought into attention the low bioavailability/high bioactivity paradox. In recent years, polyphenol metabolites have attracted great interest as many of them showed similar or higher intrinsic biological effects in comparison to the parent compounds. There is a huge body of literature reporting on the biological functions of polyphenol metabolites generated by phase I and phase II metabolic reactions and gut microbiota-mediated biotransformation. In this respect, the review highlights the pharmacokinetic fate of the major dietary polyphenols (resveratrol, curcumin, quercetin, rutin, genistein, daidzein, ellagitannins, proanthocyanidins) in order to further address the efficacy of biometabolites as compared to parent molecules. The present work strongly supports the contribution of metabolites to the health benefits of polyphenols, thus offering a better perspective in understanding the role played by dietary polyphenols in human health.
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Affiliation(s)
- Simon Vlad Luca
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania.,Department of Pharmacognosy with Medicinal Plant Unit, Faculty of Pharmacy with Medical Analytics Division, Medical University of Lublin, Lublin, Poland
| | - Irina Macovei
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania
| | - Alexandra Bujor
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania
| | - Anca Miron
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania
| | - Krystyna Skalicka-Woźniak
- Department of Pharmacognosy with Medicinal Plant Unit, Faculty of Pharmacy with Medical Analytics Division, Medical University of Lublin, Lublin, Poland
| | - Ana Clara Aprotosoaie
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania
| | - Adriana Trifan
- Department of Pharmacognosy Faculty of Pharmacy, Grigore T. Popa University of Medicine and Pharmacy Iasi, Iasi, Romania
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Silva S, Costa EM, Veiga M, Morais RM, Calhau C, Pintado M. Health promoting properties of blueberries: a review. Crit Rev Food Sci Nutr 2018; 60:181-200. [PMID: 30373383 DOI: 10.1080/10408398.2018.1518895] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
With the strengthening of the link between diet and health, several foodstuffs have emerged as possessing potential health benefits such as phenolic rich fruits and vegetables. Blueberries, along with other berries, given their flavonoid and antioxidant content have long since been considered as a particularly interesting health promoting fruit. Therefore, the present work aimed to compile the existing evidences regarding the various potential benefits of blueberry and blueberry based products consumption, giving particular relevance to in vivo works and epidemiological studies whenever available. Overall, the results demonstrate that, while the evidences that support a beneficial role of blueberry and blueberry extracts consumption, further human based studies are still needed.
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Affiliation(s)
- Sara Silva
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Porto, Portugal
| | - Eduardo M Costa
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Porto, Portugal
| | - Mariana Veiga
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Porto, Portugal
| | - Rui M Morais
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Porto, Portugal
| | - Conceição Calhau
- Nutrição e Metabolismo, NOVA Medical School, Universidade Nova de Lisboa, Lisboa, Portugal.,CINTESIS, Centro de Investigação em Tecnologias e Serviços de Saúde, Universidade do Porto, Portugal
| | - Manuela Pintado
- CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Universidade Católica Portuguesa/Porto, Porto, Portugal
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Osawe SO, Farombi EO. Quercetin and rutin ameliorates sulphasalazine-induced spermiotoxicity, alterations in reproductive hormones and steroidogenic enzyme imbalance in rats. Andrologia 2018. [PMID: 29512831 DOI: 10.1111/and.12981] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Certain dietary flavonoids exhibit protective potentials against drug-induced male reproductive toxicities. We investigated the protective effects of quercetin and rutin on sulphasalazine-induced alterations in steroidogenic enzyme activity, hormone profile and spermiotoxicity in rats. Sulphasalazine (SASP, 600 mg/kg bw) was administered alone or in combination with quercetin (20 mg/kg bw) or rutin (10 mg/kg bw) for 14 days. SASP treatment significantly increased relative weights of the epididymis and seminal vesicles. Also, testicular and epididymal sperm numbers (TSN, ESN), motility, daily sperm production (DSP) and acrosome reaction (AR) significantly decreased. SASP altered plasma testosterone, luteinising hormone (LH) and follicle-stimulating hormone (FSH) levels while testicular cholesterol levels, 3β-hydroxysteroid dehydrogenase (3β-HSD) and 17β-hydroxysteroid dehydrogenase (17β-HSD) activities were decreased. Elevated malondialdehyde levels and concomitant decrease in reduced glutathione, glutathione-S-transferase, peroxidase and superoxide dismutase activities were evident in testis and epididymis of SASP-treated rats. Quercetin or rutin co-treatment with SASP significantly reversed organ weights, preserved sperm integrity, restored plasma hormone levels and increased cholesterol levels, 3β-HSD and 17β-HSD activities in testis. Both flavonoids also prevented oxidative stress in testis and epididymis of SASP-treated rats. Quercetin and rutin protect against the negative effects of SASP treatment on reproductive capacity in male rats.
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Affiliation(s)
- S O Osawe
- Molecular Drug Metabolism & Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - E O Farombi
- Molecular Drug Metabolism & Toxicology Research Laboratories, Department of Biochemistry, College of Medicine, University of Ibadan, Ibadan, Nigeria
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Türedi S, Yuluğ E, Alver A, Bodur A, İnce İ. A morphological and biochemical evaluation of the effects of quercetin on experimental sciatic nerve damage in rats. Exp Ther Med 2018; 15:3215-3224. [PMID: 29545838 PMCID: PMC5841083 DOI: 10.3892/etm.2018.5824] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2017] [Accepted: 11/03/2017] [Indexed: 12/28/2022] Open
Abstract
The present study evaluated the neuroprotective and antioxidant effects of quercetin in a rat model of sciatic nerve crush injury using histopathological, morphometric and biochemical methods. A total of 48 male Sprague Dawley rats, aged 10-12 weeks old were randomly divided into eight groups, consisting of two sham groups (S-7, S-28), three quercetin-treated groups (Q-7, Q-28; 200 mg/kg/7 days), trauma (T-7, T-28; 1 min sciatic nerve crush injury) and three trauma+quercetin groups (T+Q-7, T+Q-28; trauma+quercetin 200 mg/kg/7 days). Rats were sacrificed on day 7 or 28. Oxidant-antioxidant biochemical parameters in nerve tissues from all groups were analyzed using histopathological staining with toluidine blue and Masson's trichrome. DNA fragmentations were identified using terminal deoxynucleotidyl transferase deoxyuridine triphosphate nick-end labeling in cells from each tissue sample. Degeneration of the axons and myelin sheath, the breakdown of the concentric lamellar structure of the myelin sheath and axonal swelling were observed in groups T-7 and T-28. Myelin sheath thicknesses, nerve fiber diameters and the number of myelinated nerve fibers decreased, while the apoptotic index (AI) increased in the T-7 and T-28 groups. However, it was observed that nerve regeneration began in the T+Q-7 and T+Q-28 groups compared with the sham groups, together with the healing of cellular damage and axonal structure and a decrease in the AI. Malondialdehyde and superoxide dismutase activity did not differ significantly between the T-7 and S-7 groups. However, catalase activity significantly decreased in the T-28 group when compared with the sham 7 day group. Tissue malondialdehyde levels significantly increased, while serum catalase activity increased in the T+Q-7 group compared with the T-7 group. These results suggest that quercetin has beneficial effects on nerve regeneration and may shorten the healing period in crush-type sciatic nerve injuries.
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Affiliation(s)
- Sibel Türedi
- Department of Histology and Embryology, Faculty of Medicine, Karadeniz Technical University, Trabzon 61080, Turkey
| | - Esin Yuluğ
- Department of Histology and Embryology, Faculty of Medicine, Karadeniz Technical University, Trabzon 61080, Turkey
| | - Ahmet Alver
- Department of Medical Biochemistry, Faculty of Medicine, Karadeniz Technical University, Trabzon 61080, Turkey
| | - Akin Bodur
- Department of Medical Biochemistry, Faculty of Medicine, Karadeniz Technical University, Trabzon 61080, Turkey
| | - İmran İnce
- Department of Medical Biochemistry, Faculty of Medicine, Karadeniz Technical University, Trabzon 61080, Turkey
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16
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Liu H, Zhou M. Antitumor effect of Quercetin on Y79 retinoblastoma cells via activation of JNK and p38 MAPK pathways. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 17:531. [PMID: 29237430 PMCID: PMC5729262 DOI: 10.1186/s12906-017-2023-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Accepted: 11/20/2017] [Indexed: 12/12/2022]
Abstract
Background Quercetin (QCT) is a flavonol present in many vegetables, it is proved to show chemo preventive effect against lung, cervical, prostate, breast and colon cancer due to its anti-inflammatory, anti-tumor and anti-oxidant property. Looking into the reported chemo-preventive effect we speculated antitumor activity in retinoblastoma (RB) Y79 cells, we also studied the molecular mechanism for antitumor activity. Methods The effect of QCT on Y79 cell viability count was done by cell counting kit, cell cycle distribution, apoptosis studies and mitochondrial membrane potential was evaluated by flow cytometry. Protein expression was done by western blot analysis. Results The outcomes of study showed that QCT reduced Y79 cell viability and caused arrest of G1 phase in cell cycle via decreasing the expression levels of cyclin-dependent kinase (CDK)2/6 and cyclin D3 and by increasing the levels of both CDK inhibitor proteins p21 and p27. Apoptosis of Y79 cells mediated by QCT occurred via activation of both caspases-3/-9. Flow cytometry studies showed that QCT caused collapse in mitochondrial membrane potential (ΔΨm) in Y79 cells. Western blot studies confirmed that QCT brought about phosphorylation of c-Jun N-terminal kinase (JNK) and p38 mitogen-activated protein kinase (MAPK). We also established that inhibitors of JNK and p38 MAPK suppressed QCT mediated activation of both caspases-3/-9 and subdued the apoptosis of cancerous Y79 cells. Conclusion All the results of the study suggest that QCT induced the apoptosis of Y79 cells via activation of JNK and p38 MAPK pathways, providing a novel treatment approach for human RB.
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17
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Baunthiyal M, Singh V, Dwivedi S. Insights of Antioxidants as Molecules for Drug Discovery. INT J PHARMACOL 2017. [DOI: 10.3923/ijp.2017.874.889] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Trendafilova I, Szegedi A, Mihály J, Momekov G, Lihareva N, Popova M. Preparation of efficient quercetin delivery system on Zn-modified mesoporous SBA-15 silica carrier. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 73:285-292. [PMID: 28183610 DOI: 10.1016/j.msec.2016.12.063] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 11/16/2016] [Accepted: 12/13/2016] [Indexed: 01/09/2023]
Abstract
Mesoporous silica material type SBA-15 was modified with different amounts of Zn (2 and 4wt.%) by incipient wetness impregnation method in ethanol. The parent, Zn-modified and quercetin loaded samples, were characterized by XRD, N2 physisorption, TEM, thermal gravimetric analysis, UV-vis and FT-IR spectroscopies and in vitro release of quercetin at pH5.5 which is typical of dermal formulations. By this loading method anhydrous quercetin was formed on the silica carrier It was found that the different hydrate forms of quercetin (dihydrate, monohydrate, anhydrite) significantly influence the physico-chemical properties of the delivery system. It was found that hydrate forms of quercetin can be differentiated by XRD and by FT-IR spectroscopic methods. Thus, by evaluating the interaction of the drug with the silica carrier the changes due to its hydration state always have to be taken into account. Formation of Zn-quercetin complex was evidenced on zinc modified SBA-15 silica by FT-IR spectroscopy. High quercetin loading capacity (over 40wt.%) could be achieved on the parent and Zn-containing SBA-15 samples. The in-vitro release process at pH=5.5 showed slower quercetin release from Zn-modified SBA-15 samples compared to the parent one. Additionally, the comparative cytotoxic experiments evidenced that quercetin encapsulated in Zn-modified silica carriers has superior antineoplastic potential against HUT-29 cells compared to free drug. Zn-modified SBA-15 silica particles could be promising carriers for dermal delivery of quercetin.
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Affiliation(s)
- Ivalina Trendafilova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
| | - Agnes Szegedi
- Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Hungarian Academy of Sciences, 1117 Budapest, Magyar Tudósok Krt. 2, Hungary
| | - Judith Mihály
- Research Centre for Natural Sciences, Institute of Materials and Environmental Chemistry, Hungarian Academy of Sciences, 1117 Budapest, Magyar Tudósok Krt. 2, Hungary
| | - Georgi Momekov
- Faculty of Pharmacy, Medical University of Sofia, 1000 Sofia, Bulgaria
| | - Nadejda Lihareva
- Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Sofia, Bulgaria
| | - Margarita Popova
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria.
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Lamuela-Raventós RM, Romero-Pérez AI, Andrés-Lacueva C, Tornero A. Review: Health Effects of Cocoa Flavonoids. FOOD SCI TECHNOL INT 2016. [DOI: 10.1177/1082013205054498] [Citation(s) in RCA: 122] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Flavonoids are phenolic substances widely found in fruits and vegetables. Many epidemiological studies associate the ingestion of flavonoids with a reduced risk of cardiovascular disease and certain types of cancer. These effects are due to the physiological activity of flavonoids in the reduction of oxidative stress, inhibiting low-density lipoproteins (LDL) oxidation and platelet aggregation, acting as vasodilators in blood vessels, inhibiting the adherence of monocytes to the vascular endothelium, promoting fibrinolysis, acting as immunomodulators and anti-inflammatory agents and as inhibitors in the different phases of tumour process. Cocoa is an important source of polyphenols, which comprise 12-18% of its total weight on dry basis; the major phenolic compounds are epicatechin, proanthocyanidins and cate-chin. The levels of flavonoids contained are higher than the ones founds in apples, onions or wine, foods known for their high amount of phenolic compounds. Cocoa and cocoa products are important sources of flavonoids in our diet. In the Dutch population chocolate contributes up to 20% of the total flavonoid intake in adults, and in children the percentage is even higher. The bioavailability of these compounds depends on other food constituents, and their interaction with the food matrix. This article reviews current evidence on the health effects of cocoa flavonoids in our diet. The compiled data supports the premise that the consumption of cocoa flavonoids is beneficial to human health.
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Affiliation(s)
- R. M. Lamuela-Raventós
- Nutrició i Bromatologia, CÈRTA, Facultat de Farmàcia, Universitat de Barcelona, Avinguda Joan XXIII s/n, 08028 Barcelona, Spain,
| | - A. I. Romero-Pérez
- Nutrició i Bromatologia, CÈRTA, Facultat de Farmàcia, Universitat de Barcelona, Avinguda Joan XXIII s/n, 08028 Barcelona, Spain
| | - C. Andrés-Lacueva
- Nutrició i Bromatologia, CÈRTA, Facultat de Farmàcia, Universitat de Barcelona, Avinguda Joan XXIII s/n, 08028 Barcelona, Spain
| | - A. Tornero
- Faculty of Science, Engineering and Environment, School of Environment and Life Sciences, University of Salford, Salford, Greater Manchester M5 4WT, UK
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Nazmi AS, Ahmad SJ, Pillai KK, Akhtar M, Ahmad A, Najmi AK. Protective effects of Bombyx mori , quercetin and benazepril against doxorubicin induced cardiotoxicity and nephrotoxicity. JOURNAL OF SAUDI CHEMICAL SOCIETY 2016. [DOI: 10.1016/j.jscs.2013.04.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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D'Andrea G. Quercetin: A flavonol with multifaceted therapeutic applications? Fitoterapia 2015; 106:256-71. [DOI: 10.1016/j.fitote.2015.09.018] [Citation(s) in RCA: 379] [Impact Index Per Article: 42.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/16/2015] [Accepted: 09/18/2015] [Indexed: 12/17/2022]
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22
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Nomura S, Monobe M, Ema K, Matsunaga A, Maeda-Yamamoto M, Horie H. Effects of flavonol-rich green tea cultivar (Camellia sinensis L.) on plasma oxidized LDL levels in hypercholesterolemic mice. Biosci Biotechnol Biochem 2015; 80:360-2. [PMID: 26364623 DOI: 10.1080/09168451.2015.1083400] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
To examine the possible benefits of tea flavonols, we compared anti-atherogenic effects between common and flavonol-rich tea cultivars. The tea infusion made from a flavonol-rich cultivar, but not a common cultivar, significantly decreased the plasma oxidized low-density lipoprotein level in mice fed a high-cholesterol diet. The result suggests that tea flavonols have the potential to protect against cardiovascular diseases.
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Affiliation(s)
- Sachiko Nomura
- a Tea Industry Research Division , NARO Institute of Vegetable and Tea Science , Shimada , Japan
| | - Manami Monobe
- a Tea Industry Research Division , NARO Institute of Vegetable and Tea Science , Shimada , Japan
| | - Kaori Ema
- a Tea Industry Research Division , NARO Institute of Vegetable and Tea Science , Shimada , Japan
| | - Akiko Matsunaga
- a Tea Industry Research Division , NARO Institute of Vegetable and Tea Science , Shimada , Japan
| | - Mari Maeda-Yamamoto
- b Food Function Division , NARO National Food Research Institute , Tsukuba , Japan
| | - Hideki Horie
- a Tea Industry Research Division , NARO Institute of Vegetable and Tea Science , Shimada , Japan
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Kawabata K, Mukai R, Ishisaka A. Quercetin and related polyphenols: new insights and implications for their bioactivity and bioavailability. Food Funct 2015; 6:1399-417. [DOI: 10.1039/c4fo01178c] [Citation(s) in RCA: 187] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The physiological functions and mechanisms of action of quercetin and its related polyphenols are highlighted, including their effects on brain, blood vessels, muscle, and intestinal microflora.
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Affiliation(s)
- Kyuichi Kawabata
- Department of Bioscience
- Fukui Prefectural University
- Eiheiji-cho, Yoshida-gun, Fukui 910-1195
- Japan
| | - Rie Mukai
- Department of Food Science
- Institute of Health Biosciences
- The University of Tokushima Graduate School
- Tokushima 770-8503
- Japan
| | - Akari Ishisaka
- School of Human Science and Environment
- University of Hyogo
- Himeji 670-0092
- Japan
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Terao J. Integrated Studies on the Action Mechanism of Oxidative Stress-regulating Food Bioactives. ACTA ACUST UNITED AC 2015. [DOI: 10.4327/jsnfs.68.3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Junji Terao
- Department of Food Science, Graduate School of Nutrition and Bioscience, Institute of Health Bioscience, the University of Tokushima
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Sapino S, Ugazio E, Gastaldi L, Miletto I, Berlier G, Zonari D, Oliaro-Bosso S. Mesoporous silica as topical nanocarriers for quercetin: characterization and in vitro studies. Eur J Pharm Biopharm 2015; 89:116-25. [DOI: 10.1016/j.ejpb.2014.11.022] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 11/19/2014] [Accepted: 11/25/2014] [Indexed: 01/10/2023]
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Jahan S, Iftikhar N, Ullah H, Rukh G, Hussain I. Alleviative effect of quercetin on rat testis against arsenic: a histological and biochemical study. Syst Biol Reprod Med 2014; 61:89-95. [PMID: 25539033 DOI: 10.3109/19396368.2014.998350] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The preventive effect of quercetin on arsenic stimulated reproductive ailments in male Sprague Dawely (SD) rats was investigated. Twenty rats were divided into four groups. The first group served as a control and was provided tap water. The second group of rats was treated with sodium arsenite at the dose of 50 ppm in drinking water. The third group served as a positive control and received an oral dose of quercetin (50 mg/kg). In the fourth group, quercetin (50 mg/kg) was co-administered orally with arsenic (50 ppm in drinking water). All the treatments were carried out for 49 days. Arsenic treatment resulted in adverse morphological and histopathological changes in testis of rats including reduced epithelial height and tubular diameter, and increased luminal diameter. In contrast, these adverse effects of arsenic were eliminated by co-administration of quercetin. Additionally arsenic treatment significantly increased testicular thiobarbituric acid reactive substance (TBARS) levels while catalase (CAT), superoxide dismutase (SOD), peroxidase (POD), and glutathione reductase (GSR) activities, and plasma and intra-testicular testosterone concentrations, were decreased significantly. Lipid peroxidation (LPO) was significantly suppressed and depleted antioxidant defense mechanism was restored by the quercetin co-treatment. Also quercetin treatment resulted in a marked increase in plasma and testicular testosterone concentrations. On the basis of these findings, it was concluded that quercetin may be used as a potential therapeutic drug against arsenic induced reproductive toxicity.
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Affiliation(s)
- Sarwat Jahan
- Reproductive Physiology Laboratory, Department of Animal Sciences, Quaid-i-Azam University , Islamabad , Pakistan and
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Johinke D, de Graaf S, Bathgate R. Quercetin reduces the in vitro production of H2O2 during chilled storage of rabbit spermatozoa. Anim Reprod Sci 2014; 151:208-19. [DOI: 10.1016/j.anireprosci.2014.10.017] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2014] [Revised: 10/10/2014] [Accepted: 10/11/2014] [Indexed: 10/24/2022]
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Lin SY, Wang YY, Chen WY, Chuang YH, Pan PH, Chen CJ. Beneficial effect of quercetin on cholestatic liver injury. J Nutr Biochem 2014; 25:1183-1195. [PMID: 25108658 DOI: 10.1016/j.jnutbio.2014.06.003] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 05/29/2014] [Accepted: 06/04/2014] [Indexed: 12/15/2022]
Abstract
Bile duct obstruction and subsequent cholestasis are associated with hepatocellular injury, cholangiocyte proliferation, stellate cell activation, Kupffer cell activation, oxidative stress, inflammation and fibrosis. Flavonoids have been shown to confer beneficial health effects, including hepatoprotection. However, the molecular mechanism of flavonoid-mediated hepatoprotection is incompletely understood. In this study, we report the protective effect of quercetin on cholestatic liver injury. Cholestasis was produced by bile duct ligation (BDL) in male Sprague-Dawley rats for 3 weeks. Daily oral administration of quercetin was started 1 week before injury and lasted for 4 weeks. In comparison with the control group, the BDL group showed liver injury, as evidenced by histological changes, and elevation in serum biochemicals, ductular reaction, fibrosis, inflammation and oxidative stress. These pathophysiological changes were attenuated by daily quercetin supplementation. Quercetin alleviated BDL-induced transforming growth factor beta-1 (TGF-β1), interleukin-1 beta, connective tissue growth factor and collagen expression. The antifibrotic effect of quercetin was accompanied by reductions in α-smooth muscle actin-positive matrix-producing cells and Smad 2/3 activity critical to the fibrogenic potential of TGF-β1. Quercetin also attenuated BDL-induced oxidative stress, leukocyte accumulation, nuclear factor (NF)-κB activation and proinflammatory cytokine production. Further studies demonstrated an inhibitory effect of quercetin on MyD88 and TGF-β-activated kinase-1 critical for linking toll-like receptor (TLR) and NF-κB. Taken together, the hepatoprotective, anti-inflammatory and antifibrotic effects of quercetin seem to be multifactorial. The beneficial effects of daily quercetin supplementation are associated with antioxidative and anti-inflammatory potential as well as down-regulation of NF-κB and TGF-β/Smad signaling, probably via interference with TLR signaling.
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Affiliation(s)
- Shih-Yi Lin
- Division of Endocrinology and Metabolism, Taichung Veterans General Hospital, Taichung 407, Taiwan; School of Medicine, National Yang-Ming University, Taipei 112, Taiwan
| | - Ya-Yu Wang
- School of Medicine, National Yang-Ming University, Taipei 112, Taiwan; Division of Family Medicine, Taichung Veterans General Hospital, Taichung 407, Taiwan
| | - Wen-Ying Chen
- Department of Veterinary Medicine, National Chung Hsing University, Taichung 402, Taiwan
| | - Yu-Han Chuang
- Division of Endocrinology and Metabolism, Taichung Veterans General Hospital, Taichung 407, Taiwan
| | - Pin-Ho Pan
- Department of Pediatrics, Tungs' Taichung MetroHarbor Hospital, Taichung 435, Taiwan
| | - Chun-Jung Chen
- Department of Medical Research, Taichung Veterans General Hospital, Taichung 407, Taiwan; Institute of Biomedical Sciences, National Chung Hsing University, Taichung 402, Taiwan; Center for General Education, Tunghai University, Taichung 407, Taiwan; Department of Nursing, HungKuang University, Taichung 433, Taiwan.
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Azuma K, Ippoushi K, Ito H, Horie H, Terao J. Enhancing Effect of Lipids and Emulsifiers on the Accumulation of Quercetin Metabolites in Blood Plasma after the Short-term Ingestion of Onion by Rats. Biosci Biotechnol Biochem 2014; 67:2548-55. [PMID: 14730132 DOI: 10.1271/bbb.67.2548] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The effects of co-ingested lipids and emulsifiers on the accumulation of quercetin metabolites in blood plasma after the short-term ingestion of onion by rats were investigated. Plasma extracts of rats that had been fed onion-containing diets for one and two weeks were analyzed by HPLC with electrochemical detection after a treatment with sulfatase/beta-glucuronidase. Almost all of the quercetin metabolites in the plasma were sulfate/glucuronide conjugates of quercetin and isorhamnetin. More than 4.6% (w/w) of soybean oil in the diets significantly enhanced the accumulation of quercetin metabolites in the plasma. Fish oil and beef tallow increased this to an extent similar to that with soybean oil, and lecithin was more effective than the other three lipids. Two emulsifiers, sodium caseinate and sucrose fatty acid ester, also showed an enhancing effect on the accumulation of quercetin metabolites. These results indicate that co-ingested lipids and emulsifiers could enhance the bioavailability of quercetin glucosides in onion.
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Affiliation(s)
- Keiko Azuma
- National Institute of Vegetable and Tea Science, National Agricultural Research Organization, Ano, Mie, Japan.
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Quercetin Attenuates Oxidative Damage Induced by Treatment of Embryonic Chicken Spermatogonial Cells with 4-Nitro-3-phenylphenol in Diesel Exhaust Particles. Biosci Biotechnol Biochem 2014; 74:934-8. [DOI: 10.1271/bbb.90740] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Russo GL, Russo M, Spagnuolo C, Tedesco I, Bilotto S, Iannitti R, Palumbo R. Quercetin: a pleiotropic kinase inhibitor against cancer. Cancer Treat Res 2014; 159:185-205. [PMID: 24114481 DOI: 10.1007/978-3-642-38007-5_11] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Increased consumption of fruits and vegetables can represent an easy strategy to significantly reduce the incidence of cancer. From this observation, derived mostly from epidemiological data, the new field of chemoprevention has emerged in the primary and secondary prevention of cancer. Chemoprevention is defined as the use of natural or synthetic compounds able to stop, reverse, or delay the process of tumorigenesis in its early stages. A large number of phytochemicals are potentially capable of simultaneously inhibiting and modulating several key factors regulating cell proliferation in cancer cells. Quercetin is a flavonoid possessing potential chemopreventive properties. It is a functionally pleiotropic molecule, possessing multiple intracellular targets, affecting different cell signaling processes usually altered in cancer cells, with limited toxicity on normal cells. Simultaneously targeting multiple pathways may help to kill malignant cells and slow down the onset of drug resistance. Among the different substrates triggered by quercetin, we have reviewed the ability of the molecule to inhibit protein kinases involved in deregulated cell growth in cancer cells.
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Affiliation(s)
- Gian Luigi Russo
- Istituto Scienze dell'Alimentazione, Consiglio Nazionale delle Ricerche, 83100, Avellino, Italy,
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Ben Abdallah F, Fetoui H, Zribi N, Fakhfakh F, Keskes L. Quercetin attenuates lambda cyhalothrin-induced reproductive toxicity in male rats. ENVIRONMENTAL TOXICOLOGY 2013; 28:673-680. [PMID: 21887817 DOI: 10.1002/tox.20762] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2011] [Revised: 06/30/2011] [Accepted: 07/10/2011] [Indexed: 05/31/2023]
Abstract
The aim of this study was to evaluate the possible protective effects of Quercetin (Qe) against oxidative stress induced by λ cyhalothrin (LTC) in reproductive system. Thirty-two male rats were divided into four groups. First group was allocated as the control group. Second group was given a Qe alone while the third group received a LTC alone. Animals in the fourth group were given a Qe with LTC. Caudae epididymis was removed for sperm analysis. Lipid peroxidation (LPO), superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx), glutathione-S-transferase (GST), and reduced glutathione (GSH) were determined in the testis. Additionally, the different histopathologic changes were observed in the testis of animals. LTC exposure significantly increased the abnormal morphology and LPO. On the contrary, sperm motility, viability and count, levels of GSH, and activities of SOD, CAT, GPx, and GST were significantly decreased compared to controls. Qe with LTC offset the decrease in functional sperm parameters, antioxidants enzymatic activities, and nonenzymatic antioxidant levels when compared with LTC-treated rats. Furthermore, LTC showed irregular seminiferous tubules containing only Sertoli cells and Qe with LTC caused regular seminiferous tubules showing spermatogenesis at level of spermatocytes. We conclude that LTC-induced oxidative stress and functional sperm parameters in male rats, and dietary of Qe attenuates the reproductive toxicity of LTC to restore the antioxidant system and sperm parameters in male rats.
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Affiliation(s)
- Fatma Ben Abdallah
- Laboratory of Histology Embryology and Reproductive Biology, Faculty of Medicine of Sfax, University of sfax, Tunisia; Laboratory of Molecular Human Genetics, Faculty of Medicine of Sfax, University of Sfax, Tunisia
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Interaction of plant phenols with food macronutrients: characterisation and nutritional-physiological consequences. Nutr Res Rev 2013; 27:1-15. [PMID: 24169001 DOI: 10.1017/s095442241300019x] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Polyphenols are dietary constituents of plants associated with health-promoting effects. In the human diet, polyphenols are generally consumed in foods along with macronutrients. Because the health benefits of polyphenols are critically determined by their bioavailability, the effect of interactions between plant phenols and food macronutrients is a very important topic. In the present review, we summarise current knowledge, with a special focus on the in vitro and in vivo effects of food macronutrients on the bioavailability and bioactivity of polyphenols. The mechanisms of interactions between polyphenols and food macronutrients are also discussed. The evidence collected in the present review suggests that when plant phenols are consumed along with food macronutrients, the bioavailability and bioactivity of polyphenols can be significantly affected. The protein-polyphenol complexes can significantly change the plasma kinetics profile but do not affect the absorption of polyphenols. Carbohydrates can enhance the absorption and extend the time needed to reach a maximal plasma concentration of polyphenols, and fats can enhance the absorption and change the absorption kinetics of polyphenols. Moreover, as highlighted in the present review, not only a nutrient alone but also certain synergisms between food macronutrients have a significant effect on the bioavailability and biological activity of polyphenols. The review emphasises the need for formulations that optimise the bioavailability and in vivo activities of polyphenols.
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Del Rio D, Rodriguez-Mateos A, Spencer JPE, Tognolini M, Borges G, Crozier A. Dietary (poly)phenolics in human health: structures, bioavailability, and evidence of protective effects against chronic diseases. Antioxid Redox Signal 2013; 18:1818-92. [PMID: 22794138 PMCID: PMC3619154 DOI: 10.1089/ars.2012.4581] [Citation(s) in RCA: 1575] [Impact Index Per Article: 143.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Human intervention trials have provided evidence for protective effects of various (poly)phenol-rich foods against chronic disease, including cardiovascular disease, neurodegeneration, and cancer. While there are considerable data suggesting benefits of (poly)phenol intake, conclusions regarding their preventive potential remain unresolved due to several limitations in existing studies. Bioactivity investigations using cell lines have made an extensive use of both (poly)phenolic aglycones and sugar conjugates, these being the typical forms that exist in planta, at concentrations in the low-μM-to-mM range. However, after ingestion, dietary (poly)phenolics appear in the circulatory system not as the parent compounds, but as phase II metabolites, and their presence in plasma after dietary intake rarely exceeds nM concentrations. Substantial quantities of both the parent compounds and their metabolites pass to the colon where they are degraded by the action of the local microbiota, giving rise principally to small phenolic acid and aromatic catabolites that are absorbed into the circulatory system. This comprehensive review describes the different groups of compounds that have been reported to be involved in human nutrition, their fate in the body as they pass through the gastrointestinal tract and are absorbed into the circulatory system, the evidence of their impact on human chronic diseases, and the possible mechanisms of action through which (poly)phenol metabolites and catabolites may exert these protective actions. It is concluded that better performed in vivo intervention and in vitro mechanistic studies are needed to fully understand how these molecules interact with human physiological and pathological processes.
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Affiliation(s)
- Daniele Del Rio
- The Laboratory of Phytochemicals in Physiology, Human Nutrition Unit, Department of Food Science, University of Parma, Parma, Italy
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Uygur R, Yagmurca M, Alkoc OA, Genc A, Songur A, Ucok K, Ozen OA. Effects of quercetin and fish n-3 fatty acids on testicular injury induced by ethanol in rats. Andrologia 2013; 46:356-69. [DOI: 10.1111/and.12085] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2013] [Indexed: 11/27/2022] Open
Affiliation(s)
- R. Uygur
- Department of Anatomy; Faculty of Medicine; Namik Kemal University; Tekirdag Turkey
| | - M. Yagmurca
- Department of Histology and Embryology; Faculty of Medicine; Fatih University; Ankara Turkey
| | - O. A. Alkoc
- Department of Anatomy; Faculty of Medicine; Istanbul Medeniyet University; Istanbul Turkey
| | - A. Genc
- Department of Physiology; Faculty of Medicine; Afyon Kocatepe University; Afyonkarahisar Turkey
| | - A. Songur
- Department of Anatomy; Faculty of Medicine; Afyon Kocatepe University; Afyonkarahisar Turkey
| | - K. Ucok
- Department of Physiology; Faculty of Medicine; Afyon Kocatepe University; Afyonkarahisar Turkey
| | - O. A. Ozen
- Department of Anatomy; Faculty of Medicine; Namik Kemal University; Tekirdag Turkey
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Sajad M, Zargan J, Zargar MA, Sharma J, Umar S, Arora R, Khan HA. Quercetin prevents protein nitration and glycolytic block of proliferation in hydrogen peroxide insulted cultured neuronal precursor cells (NPCs): Implications on CNS regeneration. Neurotoxicology 2013; 36:24-33. [PMID: 23396185 DOI: 10.1016/j.neuro.2013.01.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2012] [Revised: 01/25/2013] [Accepted: 01/28/2013] [Indexed: 10/27/2022]
Abstract
Survival along with optimal proliferation of neuronal precursors determines the outcomes of the endogenous cellular repair in CNS. Cellular-oxidation based cell death has been described in several neurodegenerative disorders. Therefore, this study was aimed at the identification of the potent targets of oxidative damage to the neuronal precursors and its effective prevention by a natural flavonoid, Quercetin. Neuronal precursor cells (NPCs), Nestin+ and GFAP (Glial fibrillary acidic protein)+ were isolated and cultured from adult rat SVZ (subventricular zone). These cells were challenged with a single dose of H2O2 (50μM) and/or pre-treated with different concentrations of Quercetin. H2O2 severely limited the cellular viability and expansion of the neurospheres. Cellular-oxidation studies revealed reduction in glutathione dependent redox buffering along with depletion of enzymatic cellular antioxidants that might potentiate the nitrite (NO2(-)) and superoxide anion (O2(-)) mediated peroxynitrite (ONOO(-)) formation and irreversible protein nitration. We identified depleted PK-M2 (M2 isoform of pyruvate kinase) activity and apoptosis of NPCs revealed by the genomic DNA fragmentation and elevated PARP (poly ADP ribose polymerase) activity along with increased Caspase activity initiated by severely depolarised mitochondrial membranes. However, the pre-treatment of Quercetin in a dose-response manner prevented these changes and restored the expansion of neurospheres preferably by neutralizing the oxidative conditions and thereby reducing peroxynitrite formation, protein nitration and PK-M2 depletion. Our results unravel the potential interactions of oxidative environment and respiration in the survival and activation of precursors and offer a promise shown by a natural flavonoid in the protective strategy for neuronal precursors of adult brain.
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Affiliation(s)
- Mir Sajad
- Clinical Toxicology Laboratory (Formerly, Developmental Toxicology Laboratory), Department of Medical Elementology and Toxicology, Jamia Hamdard (Hamdard University), New Delhi 110062, India
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Sousa MC, Braga RC, Cintra BA, de Oliveira V, Andrade CH. In silico metabolism studies of dietary flavonoids by CYP1A2 and CYP2C9. Food Res Int 2013. [DOI: 10.1016/j.foodres.2012.09.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Thilakarathna SH, Rupasinghe HPV, Needs PW. Apple peel bioactive rich extracts effectively inhibit in vitro human LDL cholesterol oxidation. Food Chem 2012; 138:463-70. [PMID: 23265512 DOI: 10.1016/j.foodchem.2012.09.121] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2012] [Revised: 08/29/2012] [Accepted: 09/24/2012] [Indexed: 01/13/2023]
Abstract
Apple peels are rich in antioxidant bioactives and hence can possess the ability to inhibit human low density lipoprotein cholesterol (LDL-C) oxidation. LDL-C oxidation is known to initiate atherosclerotic plaque formation. Unique quercetin-rich (QAE) and triterpene-rich (TAE) apple peel extracts, their constituent compounds and three in vivo quercetin metabolites were investigated for in vitro LDL-C oxidation inhibition. Both extracts effectively inhibited Cu(2+)-induced LDL-C oxidation. IC(50) of QAE and TAE for LDL-C oxidation products were 0.06-8.29 mg/L and 29.58-95.49 mg/L, respectively. Quercetin compounds, chlorogenic acid and phloridzin could contribute more to the effectiveness of QAE at physiological concentrations. The three in vivo quercetin metabolites; quercetin-3'-sulfate, quercetin-3-glucuronic acid and isorhamnetin-3-glucuronic acid were effective at physiological concentrations and therefore, QAE can be effective in LDL-C oxidation inhibition under physiological conditions. Constituent TAE compounds did not perform well under Cu(2+)-induction. Overall, both extracts effectively inhibited LDL-C oxidation in vitro.
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Affiliation(s)
- Surangi H Thilakarathna
- Department of Environmental Sciences, Faculty of Agriculture, Dalhousie University, P.O. Box 550, Truro, Nova Scotia, Canada B2N 5E3
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Oluwole Busayo A, Laura Z, Olufunke Olubusola D, Oluwafunmike Sharon A, Luciana D, Ezekiel Ademola CM. Ameliorative Effects of Ethanolic Leaf Extract ofAzadirachta indicaon Renal Histologic Alterations in Streptozotocin-Induced Diabetic Rats. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2012; 39:903-16. [DOI: 10.1142/s0192415x11009299] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
We studied the effect of ethanolic leaf extract of Azadirachta indica (AIE) on the microanatomy of the kidney of streptozotocin-induced diabetic rats. Thirty male Wistar rats (161–190 g) were randomly assigned to one of five treatment groups of six animals each: control, diabetic, diabetic + AIE, diabetic + metformin, AIE only. Diabetes was induced with a single intraperitoneal dose of streptozotocin (70 mg/kg body weight). AIE and metformin were administered orally for 50 days (50 d) at 500 mg/kg bw/d and 350 mg/kg bw/d, respectively. Blood glucose was estimated by glucose oxidase method; plasma urea and creatinine were assayed; and paraffin sections of the kidney were stained by periodic acid-Schiff technique. Untreated diabetic rats exhibited marked hyperglycemia. Renal histopathology of these animals showed features of diabetic nephropathy, with nodular glomerulosclerosis and vacuolation of proximal tubule cells (Armanni-Ebstein phenomenon). These feature were absent in the diabetic rats treated with AIE. Besides, plasma urea and creatinine were not significantly different from the control in this group (p > 0.05), in contrast to the untreated diabetic rats, where significant increases in these markers (p < 0.05). These findings showed that the leaf extract of Azadirachta indica ameliorates hyperglycemia and diabetic nephropathy in rats.
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Affiliation(s)
- Akinola Oluwole Busayo
- Department of Anatomy, College of Health Sciences, University of Ilorin, Ilorin 240003, Nigeria
| | - Zatta Laura
- Department of Comparative Anatomy and Cytology, Faculty of Biological and Environmental Sciences and Technology, University of Salento, 73100 Lecce, Italy
| | | | | | - Dini Luciana
- Department of Comparative Anatomy and Cytology, Faculty of Biological and Environmental Sciences and Technology, University of Salento, 73100 Lecce, Italy
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Galindo P, Rodriguez-Gómez I, González-Manzano S, Dueñas M, Jiménez R, Menéndez C, Vargas F, Tamargo J, Santos-Buelga C, Pérez-Vizcaíno F, Duarte J. Glucuronidated quercetin lowers blood pressure in spontaneously hypertensive rats via deconjugation. PLoS One 2012; 7:e32673. [PMID: 22427863 PMCID: PMC3299686 DOI: 10.1371/journal.pone.0032673] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Accepted: 02/02/2012] [Indexed: 02/05/2023] Open
Abstract
Background Chronic oral quercetin reduces blood pressure and restores endothelial dysfunction in hypertensive animals. However, quercetin (aglycone) is usually not present in plasma, because it is rapidly metabolized into conjugated, mostly inactive, metabolites. The aim of the study is to analyze whether deconjugation of these metabolites is involved in the blood pressure lowering effect of quercetin. Methodology/Principal Findings We have analyzed the effects on blood pressure and vascular function in vitro of the conjugated metabolites of quercetin (quercetin-3-glucuronide, Q3GA; isorhamnetin-3-glucuronide, I3GA; and quercetin-3′-sulfate, Q3'S) in spontaneously hypertensive rats (SHR). Q3GA and I3GA (1 mg/kg i.v.), but not Q3'S, progressively reduced mean blood pressure (MBP), measured in conscious SHR. The hypotensive effect of Q3GA was abolished in SHR treated with the specific inhibitor of β-glucuronidase, saccharic acid 1,4-lactone (SAL, 10 mg/ml). In mesenteric arteries, unlike quercetin, Q3GA had no inhibitory effect in the contractile response to phenylephrine after 30 min of incubation. However, after 1 hour of incubation Q3GA strongly reduced this contractile response and this effect was prevented by SAL. Oral administration of quercetin (10 mg/Kg) induced a progressive decrease in MBP, which was also suppressed by SAL. Conclusions Conjugated metabolites are involved in the in vivo antihypertensive effect of quercetin, acting as molecules for the plasmatic transport of quercetin to the target tissues. Quercetin released from its glucuronidated metabolites could be responsible for its vasorelaxant and hypotensive effect.
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Affiliation(s)
- Pilar Galindo
- Department of Pharmacology, School of Pharmacy, University of Granada, Granada, Spain
| | | | - Susana González-Manzano
- Grupo de Investigación en Polifenoles, Facultad de Farmacia, Universidad de Salamanca, Salamanca, Spain
| | - Montserrat Dueñas
- Grupo de Investigación en Polifenoles, Facultad de Farmacia, Universidad de Salamanca, Salamanca, Spain
| | - Rosario Jiménez
- Department of Pharmacology, School of Pharmacy, University of Granada, Granada, Spain
| | - Carmen Menéndez
- Department of Pharmacology, School of Medicine, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos, Madrid, Spain
- Ciber Enfermedades Respiratorias, Madrid, Spain
| | - Félix Vargas
- Department of Physiology, School of Medicine, University of Granada, Granada, Spain
| | - Juan Tamargo
- Department of Pharmacology, School of Medicine, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos, Madrid, Spain
| | - Celestino Santos-Buelga
- Grupo de Investigación en Polifenoles, Facultad de Farmacia, Universidad de Salamanca, Salamanca, Spain
| | - Francisco Pérez-Vizcaíno
- Department of Pharmacology, School of Medicine, Universidad Complutense de Madrid, Instituto de Investigación Sanitaria del Hospital Clínico San Carlos, Madrid, Spain
- Ciber Enfermedades Respiratorias, Madrid, Spain
| | - Juan Duarte
- Department of Pharmacology, School of Pharmacy, University of Granada, Granada, Spain
- * E-mail:
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The neuroprotective potential of flavonoids: a multiplicity of effects. GENES AND NUTRITION 2011; 3:115-26. [PMID: 18937002 DOI: 10.1007/s12263-008-0091-4] [Citation(s) in RCA: 336] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Flavonoids exert a multiplicity of neuroprotective actions within the brain, including a potential to protect neurons against injury induced by neurotoxins, an ability to suppress neuroinflammation, and the potential to promote memory, learning and cognitive function. These effects appear to be underpinned by two common processes. Firstly, they interact with critical protein and lipid kinase signalling cascades in the brain leading to an inhibition of apoptosis triggered by neurotoxic species and to a promotion of neuronal survival and synaptic plasticity. Secondly, they induce beneficial effects on the vascular system leading to changes in cerebrovascular blood flow capable of causing angiogenesis, neurogenesis and changes in neuronal morphology. Through these mechanisms, the consumption of flavonoid-rich foods throughout life holds the potential to limit neurodegeneration and to prevent or reverse age-dependent loses in cognitive performance. The intense interest in the development of drugs capable of enhancing brain function means that flavonoids may represent important precursor molecules in the quest to develop of a new generation of brain enhancing drugs.
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Abdallah FB, Fetoui H, Fakhfakh F, Keskes L. Caffeic acid and quercetin protect erythrocytes against the oxidative stress and the genotoxic effects of lambda-cyhalothrin in vitro. Hum Exp Toxicol 2011; 31:92-100. [PMID: 22027499 DOI: 10.1177/0960327111424303] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Lambda-cyhalothrin (LTC) is a synthetic pyrethroid with a broad spectrum of insecticidal and acaricidal activities used to control wide range of insect pests in a variety of applications. The aim of this study was to examine (i) the potency of LTC to induce oxidative stress response in rat erythrocytes in vitro and (ii) the role of caffeic acid (20 μM) and/or quercetin (10 μM) in preventing the cytotoxic effects. Erythrocytes were divided into four portions. The erythrocytes of the first portion were incubated for 4 h at 37°C with different concentrations (0, 50 and 100 μM) of LTC. The others portions were pretreated with caffeic acid and/or quercetin for 30 min prior to LTC incubation. Lipid peroxidation, protein oxidation, antioxidant enzyme activities and DNA damage were examined. LTC at different concentrations causes increased levels of lipid peroxidation, protein oxidation, DNA damage and decreased antioxidant enzyme activities. Combined caffeic acid and quercetin pretreatments significantly reduced the levels of lipid peroxidation markers, that is thiobarbituric acid reactive substance (TBARS), protein carbonyls (PCO) and decreased DNA damage in LTC portion. Further, combined caffeic acid and quercetin pretreatment maintain antioxidant enzyme activities and glutathione content near to normal values. These results suggest that LTC exerts its toxic effect by increasing lipid peroxidation, altering the antioxidant enzyme activities and DNA damage. Caffeic acid and quercetin pretreatments prevent the toxic effects of LTC, suggesting their role as a potential antioxidant.
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Affiliation(s)
- Fatma Ben Abdallah
- Laboratory of Histology Embryology and Reproductive Biology, University of Sfax, Tunisia.
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Menendez C, Dueñas M, Galindo P, González-Manzano S, Jimenez R, Moreno L, Zarzuelo MJ, Rodríguez-Gómez I, Duarte J, Santos-Buelga C, Perez-Vizcaino F. Vascular deconjugation of quercetin glucuronide: The flavonoid paradox revealed? Mol Nutr Food Res 2011; 55:1780-90. [DOI: 10.1002/mnfr.201100378] [Citation(s) in RCA: 99] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Abo-Salem OM, Abd-Ellah MF, Ghonaim MM. Hepatoprotective activity of quercetin against acrylonitrile-induced hepatotoxicity in rats. J Biochem Mol Toxicol 2011; 25:386-92. [PMID: 21823216 DOI: 10.1002/jbt.20406] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2011] [Revised: 06/08/2011] [Accepted: 06/24/2011] [Indexed: 11/11/2022]
Abstract
Acrylonitrile is a potent hepatotoxic, mutagen, and carcinogen. A role for free radical-mediated lipid peroxidation in the toxicity of acrylonitrile has been suggested. The present study was designed to assess the hepatoprotective effect of quercetin against acrylonitrile-induced hepatotoxicity in rats. Liver damage was induced by oral administration of acrylonitrile (50 mg/kg/day/5 weeks). Acrylonitrile produced a significant elevation of malondialdehyde (138.9%) with a marked decrease in reduced glutathione (72.4%), and enzymatic antioxidants; superoxide dismutase (81%), and glutathione peroxidase (53.2%) in the liver. Serum aspartate aminotransferase, alanine aminotransferases, direct bilirubin, and total bilirubin showed a significant increase in acrylonitrile alone treated rats (115.5%, 110.8%, 1006.8%, and 1000.8%, respectively). Pretreatment with quercetin (70 mg/kg/day/6 weeks) and its coadministration with acrylonitrile prevented acrylonitrile-induced alterations in hepatic lipid peroxides and enzymatic antioxidants as well as serum aminotransferases and bilirubin. Histopathological findings supported the biochemical results. We suggest that querectin possess hepatoprotective effect against acrylonitrile-induced hepatotoxicity through its antioxidant activity.
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Affiliation(s)
- Osama M Abo-Salem
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Al-Azhar University, Nasr City, Cairo, Egypt.
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Touil YS, Auzeil N, Boulinguez F, Saighi H, Regazzetti A, Scherman D, Chabot GG. Fisetin disposition and metabolism in mice: Identification of geraldol as an active metabolite. Biochem Pharmacol 2011; 82:1731-9. [PMID: 21840301 DOI: 10.1016/j.bcp.2011.07.097] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Revised: 07/25/2011] [Accepted: 07/27/2011] [Indexed: 12/21/2022]
Abstract
Although the natural flavonoid fisetin (3,3',4',7-tetrahydroxyflavone) has been recently identified as an anticancer agent with antiangiogenic properties in mice, its in vivo pharmacokinetics and metabolism are presently not characterized. Our purpose was to determine the pharmacokinetics and metabolism of fisetin in mice and determine the biological activity of a detected fisetin metabolite. After fisetin administration of an efficacious dose of 223 mg/kg i.p. in mice, the maximum fisetin concentration reached 2.5 μg/ml at 15 min and the plasma concentration declined biphasically with a rapid half-life of 0.09 h and a terminal half-life of 3.1h. Three metabolites were detected, one of which was a glucuronide of fisetin (M1), whereas another glucuronide (M2) was a glucuronide of a previously unknown fisetin metabolite (M3). HPLC-MS/MS analysis indicated that M3 was a methoxylated metabolite of fisetin (MW=300 Da). The UV spectrum of M3 was identical to that of fisetin and standard 3,4',7-trihydroxy-3'-methoxyflavone (geraldol). In addition, because M3 co-eluted with standard geraldol in 4 different chromatographic ternary gradient conditions, M3 was therefore assigned to geraldol. Of interest, this metabolite was shown to achieve higher concentrations than fisetin in Lewis lung tumors. We also compared the cytotoxic and antiangiogenic activities of fisetin and geraldol in vitro and it was found that the latter was more cytotoxic than the parent compound toward tumor cells, and that it could also inhibit endothelial cells migration and proliferation. In conclusion, these results suggest that fisetin metabolism plays an important role in its in vivo anticancer activities.
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Affiliation(s)
- Yasmine S Touil
- Université Paris Descartes, Sorbonne Paris Cité, Faculté des Sciences Pharmaceutiques et Biologiques, Institut National de Santé et de Recherche Médicale (Inserm U1022), Centre National de Recherche Scientifique (CNRS UMR8151), Chimie ParisTech, Laboratoire de pharmacologie chimique, génétique & imagerie, Paris F-75006, France
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Sriraksa N, Wattanathorn J, Muchimapura S, Tiamkao S, Brown K, Chaisiwamongkol K. Cognitive-enhancing effect of quercetin in a rat model of Parkinson's disease induced by 6-hydroxydopamine. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE : ECAM 2011; 2012:823206. [PMID: 21792372 PMCID: PMC3139913 DOI: 10.1155/2012/823206] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2011] [Revised: 05/01/2011] [Accepted: 05/25/2011] [Indexed: 11/18/2022]
Abstract
Oxidative stress has been reported to induce cognitive impairment in Parkinson's disease. This paper aimed to determine the effect of quercetin, a substance possessing antioxidant activity, on the cognitive function in a rat model of Parkinson's disease. Male Wistar rats, weighing 200-250 g, were orally given quercetin at doses of 100, 200, 300 mg/kg BW once daily for a period of 14 days before and 14 days after the unilateral lesion of right substantia nigra induced by 6-hydroxydopamine (6-OHDA). Their spatial memory was assessed at 7 and 14 days of treatment and neuron density was determined, malondialdehyde (MDA) level, the activity of superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) were evaluated at the end of the experiment. In addition, the activity of acetylcholinesterase (AChE) was also measured. It was found that all doses of quercetin enhanced spatial memory. Therefore, it is suggested that the cognitive-enhancing effect of quercetin occurs partly because of decreased oxidative damage resulting in increased neuron density.
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Affiliation(s)
- Napatr Sriraksa
- Department of Physiology and Graduate School (Neuroscience Program), Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | | | - Supaporn Muchimapura
- Department of Physiology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Somsak Tiamkao
- Department of Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Kamoltip Brown
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
| | - Kowit Chaisiwamongkol
- Department of Anatomy, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand
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Azuma K, Minami Y, Ippoushi K, Terao J. Lowering effects of onion intake on oxidative stress biomarkers in streptozotocin-induced diabetic rats. J Clin Biochem Nutr 2011; 40:131-40. [PMID: 18188415 PMCID: PMC2127222 DOI: 10.3164/jcbn.40.131] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2006] [Accepted: 10/17/2006] [Indexed: 11/22/2022] Open
Abstract
The protective effect of onion against oxidative stress in streptozotosin-induced diabetic rats was investigated in comparison with that of quercetin aglycone. We measured oxidative stress biomarkers involving the susceptibility of the plasma against copper ion-induced lipid peroxidation, which was estimated by the amounts of thiobarbituric acid-reactive substances (TBARS) and cholesteryl ester hydroperoxides, and urine TBARS and 8-hydroxydeoxyguanosine contents. After the 12-week feeding period, plasma glucose levels and these biomarkers increased in diabetic rats compared to normal rats. In diabetic rats fed a 6.0% onion diet (quercetin equivalent: 0.023%), quercetin metabolites accumulated in the plasma at concentrations of approximately 35 microM. Onion intake decreased plasma glucose levels and lowered the oxidative stress biomarkers. On the other hand, quercetin metabolites in the plasma of rats fed a diet with 0.023% quercetin aglycone were found at lower concentrations (14.2 microM) than the rats fed the onion diet. Furthermore, oxidative stress biomarkers were higher in the quercetin diet group compared to the onion diet group. These results strongly suggest that onion intake suppresses diabetes-induced oxidative stress more effectively than the intake of the same amount of quercetin aglycone alone.
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Affiliation(s)
- Keiko Azuma
- National Institute of Vegetable and Tea Science, National Agriculture and Food Research Organization, 360, Kusawa, Ano-cho, Tsu, Mie 514-2392, Japan
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Ishizawa K, Yoshizumi M, Kawai Y, Terao J, Kihira Y, Ikeda Y, Tomita S, Minakuchi K, Tsuchiya K, Tamaki T. Pharmacology in health food: metabolism of quercetin in vivo and its protective effect against arteriosclerosis. J Pharmacol Sci 2011; 115:466-70. [PMID: 21436601 DOI: 10.1254/jphs.10r38fm] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
Quercetin, a member of the bioflavonoids family, has been proposed to have anti-atherogenic, anti-inflammatory, and anti-hypertensive properties leading to the beneficial effects against cardiovascular diseases. It was recently demonstrated that quercetin 3-O-β-D-glucuronide (Q3GA) is one of the major quercetin conjugates in human plasma, in which the aglycone could not be detected. Although most of the in vitro pharmacological studies have been carried out using only the quercetin aglycone form, experiments using Q3GA would be important to discover the preventive mechanisms of cardiovascular diseases by quercetin in vivo. Therefore we examined the effects of the chemically synthesized Q3GA, as an in vivo form, on vascular smooth muscle cell (VSMC) disorders related to the progression of arteriosclerosis. Platelet-derived growth factor-induced cell migration and proliferation were inhibited by Q3GA in VSMCs. Q3GA attenuated angiotensin II-induced VSMC hypertrophy via its inhibitory effect on JNK and the AP-1 signaling pathway. Q3GA scavenged 1,1-diphenyl-2-picrylhydrazyl radical measured by the electron paramagnetic resonance method. In addition, immunohistochemical studies with monoclonal antibody 14A2 targeting the Q3GA demonstrated that the positive staining specifically accumulates in human atherosclerotic lesions, but not in the normal aorta. These findings suggest Q3GA would be an active metabolite of quercetin in plasma and may have preventative effects on arteriosclerosis relevant to VSMC disorders.
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Affiliation(s)
- Keisuke Ishizawa
- Department of Medical Pharmacology, Institute of Health Bioscience, The University of Tokushima Graduate School, Japan.
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Ben Abdallah F, Zribi N, Ammar-Keskes L. Antioxidative potential of Quercetin against hydrogen peroxide induced oxidative stress in spermatozoa in vitro. Andrologia 2011; 43:261-5. [DOI: 10.1111/j.1439-0272.2010.01063.x] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Terao J, Murota K, Kawai Y. Conjugated quercetin glucuronides as bioactive metabolites and precursors of aglyconein vivo. Food Funct 2011; 2:11-7. [DOI: 10.1039/c0fo00106f] [Citation(s) in RCA: 133] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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