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López-Fernández-Sobrino R, Torres-Fuentes C, Bravo FI, Muguerza B. Winery by-products as a valuable source for natural antihypertensive agents. Crit Rev Food Sci Nutr 2022; 63:7708-7721. [PMID: 35275757 DOI: 10.1080/10408398.2022.2049202] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hypertension (HTN) is one of the leading causes of death in the world. Agri-food by-products are emerging as a novel source of natural antihypertensive agents allowing for their valorization and making food and agricultural industries more environmentally friendly. In this regard, wine making process generates large amounts of by-products rich in phenolic compounds that have shown potential to exert several beneficial effects including antihypertensive properties. The aim of this study was to review the blood pressure-lowering effects of winery by-products. In addition, molecular mechanisms involved in their bioactivity were also evaluated. Among the winery by-products, grape seed extracts have widely shown antihypertensive properties in both animal and human studies. Moreover, recent evidence suggests that grape stem, skin and pomace and wine lees may also have great potential to manage HTN, although more studies are needed in order to confirm their potential in humans. Improvement of endothelial dysfunction and reduction of oxidative stress associated with HTN are the main mechanisms involved in the blood pressure-lowering effects of these by-products.
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Affiliation(s)
- Raúl López-Fernández-Sobrino
- Universitat Rovira i Virgili, Departament de Bioquímica i Biotecnologia, Nutrigenomics Research Group, Tarragona, Spain
| | - Cristina Torres-Fuentes
- Universitat Rovira i Virgili, Departament de Bioquímica i Biotecnologia, Nutrigenomics Research Group, Tarragona, Spain
| | - Francisca Isabel Bravo
- Universitat Rovira i Virgili, Departament de Bioquímica i Biotecnologia, Nutrigenomics Research Group, Tarragona, Spain
| | - Begoña Muguerza
- Universitat Rovira i Virgili, Departament de Bioquímica i Biotecnologia, Nutrigenomics Research Group, Tarragona, Spain
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Bravo FI, Mas-Capdevila A, López-Fernández-Sobrino R, Torres-Fuentes C, Mulero M, Alcaide-Hidalgo JM, Muguerza B. Identification of novel antihypertensive peptides from wine lees hydrolysate. Food Chem 2021; 366:130690. [PMID: 34343949 DOI: 10.1016/j.foodchem.2021.130690] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 07/16/2021] [Accepted: 07/21/2021] [Indexed: 11/04/2022]
Abstract
Enzymatic-assisted extraction using Flavourzyme® has been demonstrated to be a useful methodology to obtain wine lees (WL) enriched in phenolic compounds and with enhanced antihypertensive activity. Nevertheless, taking into account that Flavourzyme® possess proteolytic activity, the release of bioactive peptides should not be ruled out. In this study, we investigate the presence of antihypertensive peptides in the WL hydrolysate. Peptides were separated into fractions by ultrafiltration and RP-HPLC. Next, peptide identification by nano-HPLC-(Orbitrap)MS/MS was performed in the fractions showing the highest angiotensin-converting enzyme inhibitory (ACEi) activities. Six peptides were identified; three of them showing ACEi (IC50) values lower than 20 µM. The peptide antihypertensive effect was evaluated in spontaneously hypertensive rats at an oral dose of 10 mg/kg bw. Peptides FKTTDQQTRTTVA, NPKLVTIV, TVTNPARIA, LDSPSEGRAPG and LDSPSEGRAPGAD exhibited antihypertensive activity, confirming that they could contribute to the blood pressure-lowering effect of the WL hydrolysate. These peptides have a great potential as functional ingredients to manage hypertension.
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Affiliation(s)
- Francisca Isabel Bravo
- Universitat Rovira i Virgili, Department of Biochemistry and Biotechnology, Nutrigenomics Research Group, 43007 Tarragona, Spain.
| | - Anna Mas-Capdevila
- Universitat Rovira i Virgili, Department of Biochemistry and Biotechnology, Nutrigenomics Research Group, 43007 Tarragona, Spain; Eurecat, Technology Centre of Catalonia, Nutrition and Health Unit, 43204 Reus, Spain.
| | - Raúl López-Fernández-Sobrino
- Universitat Rovira i Virgili, Department of Biochemistry and Biotechnology, Nutrigenomics Research Group, 43007 Tarragona, Spain.
| | - Cristina Torres-Fuentes
- Universitat Rovira i Virgili, Department of Biochemistry and Biotechnology, Nutrigenomics Research Group, 43007 Tarragona, Spain.
| | - Miquel Mulero
- Universitat Rovira i Virgili, Department of Biochemistry and Biotechnology, Nutrigenomics Research Group, 43007 Tarragona, Spain.
| | - Juan María Alcaide-Hidalgo
- Universitat Rovira i Virgili, Department of Biochemistry and Biotechnology, Nutrigenomics Research Group, 43007 Tarragona, Spain; Eurecat, Technology Centre of Catalonia, Nutrition and Health Unit, 43204 Reus, Spain.
| | - Begoña Muguerza
- Universitat Rovira i Virgili, Department of Biochemistry and Biotechnology, Nutrigenomics Research Group, 43007 Tarragona, Spain.
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López-Fernández-Sobrino R, Soliz-Rueda JR, Ávila-Román J, Arola-Arnal A, Suárez M, Muguerza B, Bravo FI. Blood Pressure-Lowering Effect of Wine Lees Phenolic Compounds Is Mediated by Endothelial-Derived Factors: Role of Sirtuin 1. Antioxidants (Basel) 2021; 10:antiox10071073. [PMID: 34356306 PMCID: PMC8301028 DOI: 10.3390/antiox10071073] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/26/2021] [Accepted: 06/30/2021] [Indexed: 01/21/2023] Open
Abstract
The antihypertensive effect of wine lees powder (WLPW) from a Cabernet grape variety was related to its high content in flavanols and anthocyanins compounds. This study investigates the involvement of endothelial-derived factors and SIRT1 in its bioactivity. Spontaneously hypertensive rats (SHR) were orally administered water or WLPW (125 mg/kg bw). Posteriorly, both groups were intraperitoneally administered saline, Nω-nitro-L-arginine methyl ester (L-NAME), a nitric oxide (NO) synthesis inhibitor, indomethacin, a prostacyclin synthesis inhibitor, or sirtinol, an inhibitor of sirtuins. Blood pressure (BP) was recorded before and 6 h after WLPW administration. In an additional experiment, SHR were administered water or WLPW and endothelial expressions of eNos, Sirt1, Nox4, and Et1 were determined. The BP-lowering properties of WLPW were abolished by L-NAME and partially reduced by indomethacin, demonstrating that WLPW antihypertensive effect was mediated by changes in NO availability, although prostacyclin also contributed to this activity. Moreover, BP-lowering effect was reduced by sirtinol, indicating that WLPW decreased BP in a SIRT1-dependent manner. Furthermore, WLPW upregulated eNos and Sirt1 and downregulated Nox4 and Et1 endothelial gene expression. These results evidence the vasoprotective effect of WLPW and show that its antihypertensive effect in SHR is endothelium dependent and mediated by SIRT1.
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López-Fernández-Sobrino R, Soliz-Rueda JR, Suárez M, Mulero M, Arola L, Bravo FI, Muguerza B. Blood Pressure-Lowering Effect of Wine Lees: Dose-Response Study, Effect of Dealcoholization and Possible Mechanisms of Action. Nutrients 2021; 13:nu13041142. [PMID: 33808475 PMCID: PMC8066631 DOI: 10.3390/nu13041142] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 03/24/2021] [Accepted: 03/29/2021] [Indexed: 02/07/2023] Open
Abstract
The antihypertensive effect of wine lees (WL) has been previously evidenced. In this study, the antihypertensive properties of different doses of WL were evaluated in spontaneously hypertensive rats (SHR). In addition, the blood pressure (BP)-lowering effect of dried (dealcoholized) WL powder (WLPW) and the mechanisms involved in its functionality were investigated. Furthermore, a possible hypotensive effect of WLPW was discarded in Wistar-Kyoto (WKY) rats. The administration of WL at different doses caused a dose-dependent decrease in BP of SHR up to 5.0 mL/kg bw, exhibiting the maximum decrease at 6 h post-administration. WLPW caused a greater drop in BP than WL, showing an antihypertensive effect higher and more prolonged than the drug Captopril. Moreover, the BP-lowering effect of WLPW was specific to the hypertensive state since an undesirable hypotensive effect in normotensive WKY rats was ruled out. Finally, WLPW improved oxidative stress and increased the activity of the antioxidant endogen system of SHR. These results suggest that WLPW could be used as functional ingredient for foods or nutraceuticals to ameliorate hypertension. Nevertheless, further clinical studies are needed to evaluate its long-term antihypertensive efficiency.
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Enzyme-Assisted Extraction to Obtain Phenolic-Enriched Wine Lees with Enhanced Bioactivity in Hypertensive Rats. Antioxidants (Basel) 2021; 10:antiox10040517. [PMID: 33810336 PMCID: PMC8065631 DOI: 10.3390/antiox10040517] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/21/2021] [Accepted: 03/23/2021] [Indexed: 02/06/2023] Open
Abstract
The antihypertensive effect of the soluble fraction of wine lees (WL) from Cabernet variety grapes was recently reported by our group. This blood pressure (BP)-lowering effect was attributed to the presence of flavanols and anthocyanins. In this context, phenolic-enriched wine lees (PWL) could potentially exhibit a stronger bioactivity. Therefore, the aim of this study was to obtain a soluble fraction of WL with increased phenolic content and evaluate its functionality. The PWL were obtained using an enzyme-assisted extraction based on the hydrolysis of WL proteins with Flavourzyme®. They contained 57.20% more total phenolic compounds than WL, with anthocyanins and flavanols being the largest families present. In addition, PWL also showed greater angiotensin-converting enzyme inhibitory and antioxidant activities. Finally, the antihypertensive activity of the PWL was evaluated in spontaneously hypertensive rats. A single dose of 5 mL/kg body weight of PWL showed a greater BP-lowering effect than the one shown by WL. Moreover, this antihypertensive effect was more prolonged than the one produced by the antihypertensive drug Captopril. These results demonstrate that enzymatic protein hydrolysis is a useful method to maximize the extraction of phenolic compounds from WL and to obtain extracts with enhanced functionalities.
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López-Fernández-Sobrino R, Soliz-Rueda JR, Margalef M, Arola-Arnal A, Suárez M, Bravo FI, Muguerza B. ACE Inhibitory and Antihypertensive Activities of Wine Lees and Relationship among Bioactivity and Phenolic Profile. Nutrients 2021; 13:nu13020679. [PMID: 33672674 PMCID: PMC7924335 DOI: 10.3390/nu13020679] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/10/2021] [Accepted: 02/16/2021] [Indexed: 12/11/2022] Open
Abstract
Wine lees (WL) are by-products generated in the winemaking process. The aim of this study was to investigate the angiotensin-converting enzyme inhibitory (ACEi) activity, and the blood pressure (BP) lowering effect of WL from individual grape varieties. The relationship among their activities and phenolic profiles was also studied. Three WL, from Cabernet, Mazuela, and Garnacha grape varieties, were firstly selected based on their ACEi properties. Their phenolic profiles were fully characterized by UHPLC-ESI-Q-TOF-MS. Then, their potential antihypertensive effects were evaluated in spontaneously hypertensive rats (SHR). BP was recorded before and after their oral administrations (2, 4, 6, 8, 24, and 48 h) at a dose of 5 mL/kg bw. Cabernet WL (CWL) exhibited a potent antihypertensive activity, similar to that obtained with the drug Captopril. This BP-lowering effect was related to the high amount of anthocyanins and flavanols present in these lees. In addition, a potential hypotensive effect of CWL was discarded in normotensive Wistar-Kyoto rats. Finally, the ACEi and antihypertensive activities of CWL coming from a different harvest were confirmed. Our results suggest the potential of CWL for controlling arterial BP, opening the door to commercial use within the wine industry.
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Castro MC, Villagarcía H, Nazar A, Arbeláez LG, Massa ML, Del Zotto H, Ríos JL, Schinella GR, Francini F. Cacao extract enriched in polyphenols prevents endocrine-metabolic disturbances in a rat model of prediabetes triggered by a sucrose rich diet. JOURNAL OF ETHNOPHARMACOLOGY 2020; 247:112263. [PMID: 31580944 DOI: 10.1016/j.jep.2019.112263] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 09/23/2019] [Accepted: 09/29/2019] [Indexed: 06/10/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Cocoa extracts rich in polyphenols are used as potential agent for treating diabetes. Cocoa polyphenols have been proved to ameliorate important hallmarks of type-2 diabetes (T2D). They can regulate glucose levels by increasing insulin secretion, promoting β-cell proliferation and a reduction of insulin resistance. In addition, epidemiological evidence indicates that consumption of flavonoid decreases the incidence of T2D. AIM OF THE STUDY T2D is preceded by a prediabetic state in which the endocrine-metabolic changes described in T2D are already present. Since epidemiological evidence indicates that consumption of flavonoid decreases its incidence, we evaluated possible preventive effects of polyphenol-enriched cocoa extract on a model of prediabetes induced by sucrose. MATERIALS AND METHODS We determined circulating parameters and insulin sensitivity indexes, liver protein carbonyl groups and reduced glutathione, liver mRNA expression levels of lipogenic enzymes, expression of different pro-inflammatory mediators, fructokinase activity and liver glycogen content. For that, radioimmunoassay, real-time polymerase chain reaction, Western blot, spectrophotometry, and immunohistochemistry were used. RESULTS We demonstrated that sucrose administration triggered hypertriglyceridemia, insulin-resistance, and liver increased oxidative stress and inflammation markers compared to control rats. Additionally, we found an increase in glycogen deposit, fructokinase activity, and lipogenic genes expression (SREBP-1c, FAS and GPAT) together with a decrease in P-Akt and P-eNOS protein content (P < 0.05). Sucrose-induced insulin resistance, hepatic carbohydrate and lipid dysmetabolism, oxidative stress, and inflammation were effectively disrupted by polyphenol-enriched cocoa extract (PECE) co-administration (P < 0.05). CONCLUSION Dietary administration of cocoa flavanols may be an effective and complementary tool for preventing or reverting T2D at an early stage of its development (prediabetes).
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Affiliation(s)
- María Cecilia Castro
- CENEXA (Centro de Endocrinología Experimental y Aplicada) (UNLP-CONICET La Plata-FCM, CEAS-CICPBA), La Plata, Argentina
| | - Hernán Villagarcía
- CENEXA (Centro de Endocrinología Experimental y Aplicada) (UNLP-CONICET La Plata-FCM, CEAS-CICPBA), La Plata, Argentina
| | - Ada Nazar
- CENEXA (Centro de Endocrinología Experimental y Aplicada) (UNLP-CONICET La Plata-FCM, CEAS-CICPBA), La Plata, Argentina
| | - Luisa González Arbeláez
- CIC (Centro de Investigaciones Cardiovasculares) (UNLP-CONICET La Plata-FCM), La Plata, Argentina
| | - María Laura Massa
- CENEXA (Centro de Endocrinología Experimental y Aplicada) (UNLP-CONICET La Plata-FCM, CEAS-CICPBA), La Plata, Argentina
| | - Héctor Del Zotto
- CENEXA (Centro de Endocrinología Experimental y Aplicada) (UNLP-CONICET La Plata-FCM, CEAS-CICPBA), La Plata, Argentina
| | - José Luis Ríos
- Departament de Farmacologia, Facultat de Farmàcia, Universitat de València, Burjassot, Spain
| | - Guillermo R Schinella
- Cátedra Farmacología Básica, Facultad de Ciencias Médicas UNLP and CICPBA, La Plata, Argentina
| | - Flavio Francini
- CENEXA (Centro de Endocrinología Experimental y Aplicada) (UNLP-CONICET La Plata-FCM, CEAS-CICPBA), La Plata, Argentina.
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Sánchez M, Romero M, Gómez-Guzmán M, Tamargo J, Pérez-Vizcaino F, Duarte J. Cardiovascular Effects of Flavonoids. Curr Med Chem 2019; 26:6991-7034. [DOI: 10.2174/0929867326666181220094721] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Revised: 10/29/2018] [Accepted: 10/29/2018] [Indexed: 02/07/2023]
Abstract
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Cardiovascular Disease (CVD) is the major cause of death worldwide, especially in Western
society. Flavonoids are a large group of polyphenolic compounds widely distributed in plants, present
in a considerable amount in fruit and vegetable. Several epidemiological studies found an inverse association
between flavonoids intake and mortality by CVD. The antioxidant effect of flavonoids was
considered the main mechanism of action of flavonoids and other polyphenols. In recent years, the role
of modulation of signaling pathways by direct interaction of flavonoids with multiple protein targets,
namely kinases, has been increasingly recognized and involved in their cardiovascular protective effect.
There are strong evidence, in in vitro and animal experimental models, that some flavonoids induce
vasodilator effects, improve endothelial dysfunction and insulin resistance, exert platelet antiaggregant
and atheroprotective effects, and reduce blood pressure. Despite interacting with multiple targets, flavonoids
are surprisingly safe. This article reviews the recent evidence about cardiovascular effects that
support a beneficial role of flavonoids on CVD and the potential molecular targets involved.
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Affiliation(s)
- Manuel Sánchez
- Department of Pharmacology, School of Pharmacy, University of Granada, and Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Granada, Spain
| | - Miguel Romero
- Department of Pharmacology, School of Pharmacy, University of Granada, and Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Granada, Spain
| | - Manuel Gómez-Guzmán
- Department of Pharmacology, School of Pharmacy, University of Granada, and Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Granada, Spain
| | - Juan Tamargo
- Department of Pharmacology, School of Medicine, Complutense University of Madrid and Instituto de Investigación Sanitaria Gregorio Marañón (IISGM), Madrid, Spain
| | - Francisco Pérez-Vizcaino
- Department of Pharmacology, School of Medicine, Complutense University of Madrid and Instituto de Investigación Sanitaria Gregorio Marañón (IISGM), Madrid, Spain
| | - Juan Duarte
- Department of Pharmacology, School of Pharmacy, University of Granada, and Instituto de Investigación Biosanitaria de Granada (ibs.GRANADA), Granada, Spain
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Paredes MD, Romecín P, Atucha NM, O'Valle F, Castillo J, Ortiz MC, García-Estañ J. Moderate Effect of Flavonoids on Vascular and Renal Function in Spontaneously Hypertensive Rats. Nutrients 2018; 10:nu10081107. [PMID: 30115889 PMCID: PMC6115889 DOI: 10.3390/nu10081107] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 08/14/2018] [Accepted: 08/15/2018] [Indexed: 01/05/2023] Open
Abstract
Many studies have shown that flavonoids are effective as antihypertensive drugs in arterial hypertension. In the present work, we have analyzed the effects of some flavonoid extracts in the spontaneous hypertensive rat model (SHR). An important feature of this study is that we have used a low dose, far from those that are usually applied in human therapy or experimental animals, a dose that responded to the criterion of a potential future commercial use in human subjects. Treatments were carried out for 6 and 12 weeks in two groups of SHR rats, which received apigenin, lemon extract, grapefruit + bitter orange (GBO) extracts, and cocoa extract. Captopril was used as a positive control in the SHR group treated for 6 weeks (SHR6) and Diosmin was used as the industry reference in the SHR group treated for 12 weeks (SHR12). Captopril and GBO extracts lowered the high arterial pressure of the SHR6 animals, but none of the extracts were effective in the SHR12 group. Apigenin, lemon extract (LE), GBO, and captopril also improved aortic vascular relaxation and increased plasma and urinary excretion of nitrites, but only in the SHR6 group. Kidney and urinary thiobarbituric acid reactive substances (TBARS) were also significantly reduced by GBO in the SHR6 rats. Apigenin also improved vascular relaxation in the SHR12 group and all the flavonoids studied reduced urinary thiobarbituric acid reactive substances (TBARS) excretion and proteinuria. Vascular abnormalities, such as lumen/wall ratio in heart arteries and thoracic aorta, were moderately improved by these treatments in the SHR6 group. In conclusion, the flavonoid-rich extracts included in this study, especially apigenin, LE and GBO improved vascular vasodilatory function of young adult SHRs but only the GBO-treated rats benefited from a reduction in blood pressure. These extracts may be used as functional food ingredients with a moderate therapeutic benefit, especially in the early phases of arterial hypertension.
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Affiliation(s)
- María D Paredes
- Department of Physiology, School of Medicine & Biosanitary Research Murcian Institute (IMIB), University of Murcia, 30120 Murcia, Spain.
| | - Paola Romecín
- Department of Physiology, School of Medicine & Biosanitary Research Murcian Institute (IMIB), University of Murcia, 30120 Murcia, Spain.
| | - Noemí M Atucha
- Department of Physiology, School of Medicine & Biosanitary Research Murcian Institute (IMIB), University of Murcia, 30120 Murcia, Spain.
| | - Francisco O'Valle
- Department of Pathological Anatomy, School of Medicine, IBIMER (CIBM) & Ibs.GRANADA, University of Granada, 18016 Granada, Spain.
| | - Julián Castillo
- Institute of Aging & R & D, Nutrafur SA-FRUTAROM Group, 30820 Alcantarilla , Spain.
| | - María Clara Ortiz
- Department of Physiology, School of Medicine & Biosanitary Research Murcian Institute (IMIB), University of Murcia, 30120 Murcia, Spain.
| | - Joaquín García-Estañ
- Department of Physiology, School of Medicine & Biosanitary Research Murcian Institute (IMIB), University of Murcia, 30120 Murcia, Spain.
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Zheng S, Deng S, Huang Y, Huang M, Zhao P, Ma X, Wen Y, Wang Q, Yang X. Anti-diabetic activity of a polyphenol-rich extract from Phellinus igniarius in KK-Ay mice with spontaneous type 2 diabetes mellitus. Food Funct 2018; 9:614-623. [PMID: 29271444 DOI: 10.1039/c7fo01460k] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The present study investigated the anti-diabetic activity and potential mechanisms of the polyphenol rich extract from Phellinus igniarius (PI-PRE) in vitro and in vivo. Four main phenolic compounds of PI-PRE were purified and identified as 7,8-dihydroxycoumarin, 3,4-dihydroxybenzalacetone, 7,3'-dihydroxy-5'-methoxyisoflavone and inoscavin C by the off-line semipreparative liquid chromatography-nuclear magnetic resonance protocol. In vitro, PI-PRE stimulated GLUT4 translocation by 2.34-fold and increased glucose uptake by 1.73-fold in L6 cells. However, the selective AMP-activated protein kinase (AMPK) inhibitor, compound C, completely reversed the PI-PRE-induced GLUT4 translocation. In vivo, KK-Ay mice treated with PI-PRE for four weeks had lower fasting blood glucose levels, as well as other blood-lipid indexes, compared with the vehicle control group. Mechanistic studies showed that the expressions of p-AMPKα and GLUT4 were significantly increased by treatment with PI-PRE in L6 cells. In KK-Ay mice, the expression of p-AMPKα was enhanced in the liver and skeletal muscle, and the expression of GLUT4 was increased in skeletal muscle. These findings suggest that PI-PRE possesses potential anti-diabetic effects including improving glucose tolerance, reducing hyperglycemia, and normalizing insulin levels. These effects are partly due to the activation of GLUT4 translocation via the modulation of the AMPK pathway.
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Affiliation(s)
- Sijian Zheng
- School of Pharmaceutical Sciences, South-Central University for Nationalities, 182 Min-Zu Road, Wuhan 430074, China.
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Beneficial Effects of Different Flavonoids on Vascular and Renal Function in L-NAME Hypertensive Rats. Nutrients 2018; 10:nu10040484. [PMID: 29652818 PMCID: PMC5946269 DOI: 10.3390/nu10040484] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2018] [Revised: 04/02/2018] [Accepted: 04/10/2018] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND we have evaluated the antihypertensive effect of several flavonoid extracts in a rat model of arterial hypertension caused by chronic administration (6 weeks) of the nitric oxide synthesis inhibitor, L-NAME. METHODS Sprague Dawley rats received L-NAME alone or L-NAME plus flavonoid-rich vegetal extracts (Lemon, Grapefruit + Bitter Orange, and Cocoa) or purified flavonoids (Apigenin and Diosmin) for 6 weeks. RESULTS L-NAME treatment resulted in a marked elevation of blood pressure, and treatment with Apigenin, Lemon Extract, and Grapefruit + Bitter Orange extracts significantly reduced the elevated blood pressure of these animals. Apigenin and some of these flavonoids also ameliorated nitric oxide-dependent and -independent aortic vasodilation and elevated nitrite urinary excretion. End-organ abnormalities such as cardiac infarcts, hyaline arteriopathy and fibrinoid necrosis in coronary arteries and aorta were improved by these treatments, reducing the end-organ vascular damage. CONCLUSIONS the flavonoids included in this study, specially apigenin, may be used as functional food ingredients with potential therapeutic benefit in arterial hypertension.
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Margalef M, Pons Z, Iglesias-Carres L, Quiñones M, Bravo FI, Arola-Arnal A, Muguerza B. Rat health status affects bioavailability, target tissue levels, and bioactivity of grape seed flavanols. Mol Nutr Food Res 2016; 61. [DOI: 10.1002/mnfr.201600342] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 07/26/2016] [Accepted: 09/02/2016] [Indexed: 02/05/2023]
Affiliation(s)
- Maria Margalef
- Nutrigenomic Research Group, Department of Biochemistry and Biotechnology; Universitat Rovira i Virgili; Tarragona Spain
- Centre Tecnològic de Nutrició i Salut (CTNS); TECNIO, CEICS; Reus Spain
| | - Zara Pons
- Nutrigenomic Research Group, Department of Biochemistry and Biotechnology; Universitat Rovira i Virgili; Tarragona Spain
| | - Lisard Iglesias-Carres
- Nutrigenomic Research Group, Department of Biochemistry and Biotechnology; Universitat Rovira i Virgili; Tarragona Spain
| | - Mar Quiñones
- Nutrigenomic Research Group, Department of Biochemistry and Biotechnology; Universitat Rovira i Virgili; Tarragona Spain
- Department of Physiology; CIMUS; University of Santiago de Compostela - Instituto de Investigación Sanitaria; Santiago de Compostela Spain
| | - Francisca Isabel Bravo
- Nutrigenomic Research Group, Department of Biochemistry and Biotechnology; Universitat Rovira i Virgili; Tarragona Spain
| | - Anna Arola-Arnal
- Nutrigenomic Research Group, Department of Biochemistry and Biotechnology; Universitat Rovira i Virgili; Tarragona Spain
| | - Begoña Muguerza
- Nutrigenomic Research Group, Department of Biochemistry and Biotechnology; Universitat Rovira i Virgili; Tarragona Spain
- Centre Tecnològic de Nutrició i Salut (CTNS); TECNIO, CEICS; Reus Spain
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Cocoa bean (Theobroma cacao L.) phenolic extracts as PTP1B inhibitors, hepatic HepG2 and pancreatic β-TC3 cell cytoprotective agents and their influence on oxidative stress in rats. Food Res Int 2016. [DOI: 10.1016/j.foodres.2016.01.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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14
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Serrano J, Casanova-Martí À, Gil-Cardoso K, Blay MT, Terra X, Pinent M, Ardévol A. Acutely administered grape-seed proanthocyanidin extract acts as a satiating agent. Food Funct 2016; 7:483-90. [PMID: 26514231 DOI: 10.1039/c5fo00892a] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Grape-seed proanthocyanidins' role as stimulators of active GLP-1 in rats suggests that they could be effective as satiating agents. Wistar rats were used to study the effects of proanthocyanidins on food intake with different doses, administration times and proanthocyanidin extract compositions. A dose of 423 mg of phenolics per kg body weight (BW) of grape-seed proanthocyanidin extract (GSPE) was necessary to decrease the 12-hour cumulative food intake by 18.7 ± 3.4%. Proanthocyanidins were effective when delivered directly into the gastrointestinal tract one hour before, or simultaneously at the start of the feeding period. Proanthocyanidins without galloyl forms, such as those from cocoa extract, were not as effective as grape-seed derived forms. GSPE increased the portal levels of active GLP-1 and total ghrelin and decreased the CCK levels, simultaneously with a decrease in gastric emptying. In conclusion, grape-seed proanthocyanidins could be useful as a satiating agent under the conditions defined in this study.
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Affiliation(s)
- Joan Serrano
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - Àngela Casanova-Martí
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - Katherine Gil-Cardoso
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - M Teresa Blay
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - Ximena Terra
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - Montserrat Pinent
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
| | - Anna Ardévol
- Universitat Rovira i Virgili, Biochemistry and Biotechnology Department, c/Marcel lí Domingo no. 1, 43007, Tarragona, Spain.
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15
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Salinivibrio costicola GL6, a Novel Isolated Strain for Biotransformation of Caffeine to Theobromine Under Hypersaline Conditions. Curr Microbiol 2016; 74:34-41. [DOI: 10.1007/s00284-016-1148-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Accepted: 10/13/2016] [Indexed: 10/20/2022]
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16
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Hahn M, Baierle M, Charão MF, Bubols GB, Gravina FS, Zielinsky P, Arbo MD, Cristina Garcia S. Polyphenol-rich food general and on pregnancy effects: a review. Drug Chem Toxicol 2016; 40:368-374. [DOI: 10.1080/01480545.2016.1212365] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Marla Hahn
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
| | - Marília Baierle
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
- Post-Graduate Program in Pharmaceutical Sciences (PPGCF), Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
| | - Mariele F. Charão
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
- Toxicological Analysis Laboratory, Institute of Health Sciences, Feevale University, Novo Hamburgo, RS, Brazil,
| | - Guilherme B. Bubols
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
- Post-Graduate Program in Pharmaceutical Sciences (PPGCF), Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
| | - Fernanda S. Gravina
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
| | - Paulo Zielinsky
- Cardiology Institute, University Foundation of Cardiology, Porto Alegre, RS, Brazil, and
| | - Marcelo D. Arbo
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
- Post-Graduate Program in Pharmaceutical Sciences (PPGCF), Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
- Department of Veterinary Clinical Pathology, Faculty of Veterinary, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil
| | - Solange Cristina Garcia
- Laboratory of Toxicology (LATOX), Department of Analysis, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
- Post-Graduate Program in Pharmaceutical Sciences (PPGCF), Faculty of Pharmacy, Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil,
- Cardiology Institute, University Foundation of Cardiology, Porto Alegre, RS, Brazil, and
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17
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Margalef M, Pons Z, Iglesias-Carres L, Bravo FI, Muguerza B, Arola-Arnal A. Lack of tissue accumulation of grape seed flavanols after daily long-term administration in healthy and cafeteria-diet obese rats. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:9996-10003. [PMID: 26496863 DOI: 10.1021/acs.jafc.5b03856] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
After ingestion flavanols are metabolized by phase-II enzymes and the microbiota and are distributed throughout the body depending on several factors. Herein we aim to evaluate whether flavanols are tissue-accumulated after the long-term administration of a grape seed polyphenol extract (GSPE) in rats and to study if compounds present in tissues differ in a cafeteria-diet obesity state. For that, plasma, liver, mesenteric white adipose tissue (MWAT), brain, and aorta flavanol metabolites from standard chow-diet-fed (ST) and cafeteria-diet-fed (CAF) rats were analyzed by high-performance liquid chromatography electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS) 21 h after the last 12-week-daily GSPE (100 mg/kg) dosage. Results showed that long-term GSPE intake did not trigger a flavanol tissue accumulation, indicating a clearance of products at each daily dosage. Therefore, results suggest that polyphenol benefits in a disease state would be due to a daily pulsatile effect. Moreover, obesity induced by diet also influences the metabolism and bioavailability of flavanols in rats.
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Affiliation(s)
- Maria Margalef
- Nutrigenomic Research Group, Biochemistry and Biotechnology Department, Rovira i Virgili University , Tarragona 43003, Spain
| | - Zara Pons
- Nutrigenomic Research Group, Biochemistry and Biotechnology Department, Rovira i Virgili University , Tarragona 43003, Spain
| | - Lisard Iglesias-Carres
- Nutrigenomic Research Group, Biochemistry and Biotechnology Department, Rovira i Virgili University , Tarragona 43003, Spain
| | - Francisca Isabel Bravo
- Nutrigenomic Research Group, Biochemistry and Biotechnology Department, Rovira i Virgili University , Tarragona 43003, Spain
| | - Begoña Muguerza
- Nutrigenomic Research Group, Biochemistry and Biotechnology Department, Rovira i Virgili University , Tarragona 43003, Spain
- Technological Center of Nutrition and Health (CTNS), TECNIO, CEICS , Reus 43204, Spain
| | - Anna Arola-Arnal
- Nutrigenomic Research Group, Biochemistry and Biotechnology Department, Rovira i Virgili University , Tarragona 43003, Spain
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18
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Pons Z, Margalef M, Bravo FI, Arola-Arnal A, Muguerza B. Acute administration of single oral dose of grape seed polyphenols restores blood pressure in a rat model of metabolic syndrome: role of nitric oxide and prostacyclin. Eur J Nutr 2015; 55:749-758. [DOI: 10.1007/s00394-015-0895-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Accepted: 03/30/2015] [Indexed: 01/10/2023]
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Abstract
One of the main mechanisms by which dietary flavonoids are thought to influence cardiovascular disease is via protection of the bioactivity of the endothelium-derived nitric oxide (NO). Additionally, flavonoids may also interfere with the signalling cascades of inflammation and prevent overproduction of NO and its deleterious consequences in shock and ischemia-reperfusion injury. In the present paper we review the evidence of the effects of flavonoids on NO. Flavonoids exert complex actions on the synthesis and bioavailability of NO which may result both in enhanced or decreased NO levels: (1) in cell free systems, several flavonoids may scavenge NO via its pro-oxidant properties by increasing superoxide. However, under conditions of oxidative stress, flavonoids may also protect NO from superoxide-driven inactivation. (2) In intact healthy tissues, some flavonoids increase eNOS activity in endothelial cells. Paradoxically this effect involves a pro-oxidant effect which results in Ca(2+)-dependent activation of eNOS. As inhibitors of PI3K, flavonoids may potentially inhibit the PI3K/Akt-dependent activation of eNOS. (3) Under conditions of inflammation and oxidative stress, flavonoids may prevent the inflammatory signalling cascades via inhibition of NFκB and thereby downregulate iNOS. On the other hand, they also prevent the overexpression of ROS generating enzymes, reducing superoxide and peroxynitrite levels, and hence preventing superoxide-induced NO inactivation and eNOS uncoupling. Therefore, the final effect of flavonoids on NO levels will depend on the flavonoid structure and the concentrations used, on the cell type under study and particularly on the presence of inflammatory/oxidative conditions.
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Affiliation(s)
- J Duarte
- Department of Pharmacology, University of Granada, 18071, Granada, Spain
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Guerrero L, Margalef M, Pons Z, Quiñones M, Arola L, Arola-Arnal A, Muguerza B. Serum metabolites of proanthocyanidin-administered rats decrease lipid synthesis in HepG2 cells. J Nutr Biochem 2014; 24:2092-9. [PMID: 24231101 DOI: 10.1016/j.jnutbio.2013.08.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2013] [Revised: 06/14/2013] [Accepted: 08/01/2013] [Indexed: 12/22/2022]
Abstract
The regular consumption of flavonoids has been associated with reduced mortality and a decreased risk of cardiovascular diseases. The proanthocyanidins found in plasma are very different from the original flavonoids in food sources. The use of physiologically appropriate conjugates of proanthocyanidins is essential for the in vitro analysis of flavonoid bioactivity. In this study, the effect of different proanthocyanidin-rich extracts, which were obtained from cocoa (CCX), French maritime pine bark (Pycnogenol extract, PYC) and grape seed (GSPE), on lipid homeostasis was evaluated. Hepatic human cells (HepG2 cells) were treated with 25 mg/L of CCX, PYC or GSPE. We also performed in vitro experiments to assess the effect on lipid synthesis that is induced by the bioactive GSPE proanthocyanidins using the physiological metabolites that are present in the serum of GSPE-administered rats. For this, Wistar rats were administered 1 g/kg of GSPE, and serum was collected after 2 h. The semipurified serum of GSPE-administered rats was fully characterized by liquid chromatography tandem triple quadrupole mass spectrometry (LC-QqQ/MS(2)). The lipids studied in the analyses were free cholesterol (FC), cholesterol ester (CE) and triglycerides (TG). All three proanthocyanidin-rich extracts induced a remarkable decrease in the de novo lipid synthesis in HepG2 cells. Moreover, GSPE rat serum metabolites reduced the total percentage of CE, FC and particularly TG; this reduction was significantly higher than that observed in the cells directly treated with GSPE. In conclusion, the bioactivity of the physiological metabolites that are present in the serum of rats after their ingestion of a proanthocyanidin-rich extract was demonstrated in Hep G2 cells.
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Affiliation(s)
- Ligia Guerrero
- Department of Biochemistry and Biotechnology, Rovira i Virgili University, Tarragona 43007, Spain; Department of Research, Nutrition and Innovation, ALPINA S.A, Bogotá, Colombia
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21
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Pons Z, Guerrero L, Margalef M, Arola L, Arola-Arnal A, Muguerza B. Effect of low molecular grape seed proanthocyanidins on blood pressure and lipid homeostasis in cafeteria diet-fed rats. J Physiol Biochem 2014; 70:629-37. [DOI: 10.1007/s13105-014-0329-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Accepted: 02/23/2014] [Indexed: 12/27/2022]
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22
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Li F, Takahashi Y, Yamaki K. Inhibitory effect of catechin-related compounds on renin activity. Biomed Res 2014; 34:167-71. [PMID: 23782751 DOI: 10.2220/biomedres.34.167] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Renin is a crucial enzyme in the renin-angiotensin system, and the inhibition of its activity is considered as a useful approach to the treatment of hypertension. The inhibitory effect of catechin-related compounds on renin was investigated in this work. It was found that epigallocatechin gallate (EGCg) possessed the strongest activity with an IC₅₀ value of 44.53 μM and acted in an uncompetitive manner. Gallated catechins exerted higher inhibition than the ungallated forms, and gallic acid exhibited an inhibitory potency close to that of epicatechin gallate (ECg). Results indicated that the galloyl moiety and ortho-trihydroxy phenyl structures might be favorable for the renin-inhibitory activity of these compounds.
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Affiliation(s)
- Fengjuan Li
- National Food Research Institute, National Agricultural and Food Research Organization, 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
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Li F, Ohnishi-Kameyama M, Takahashi Y, Yamaki K. Tea polyphenols as novel and potent inhibitory substances against renin activity. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:9697-9704. [PMID: 24028635 DOI: 10.1021/jf403710b] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Renin inhibitory activities of three tea products were investigated for the first time in this work. Water extracts from fermented oolong and black tea showed strong renin inhibitory activities. By the means of ultrafiltration, gradient high performance liquid chromatography and spectroscopic analysis, four active compounds were separated from aqueous black tea extract and identified as theasinensin B, theasinensin C, strictinin, and a hexose sulfate with a galloyl moiety, which had IC50 values of 19.33, 40.21, 311.09, and 50.16 μM against renin activity, respectively. Further detection indicated that the potent inhibitor theasinensin B was present only in black tea, and that monomeric catechins did not contribute significantly to the renin inhibitory activities of tea products. These results revealed novel and potent tea-derived renin inhibitors and suggested another potential pathway for tea consumption to control hypertension.
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Affiliation(s)
- Fengjuan Li
- National Food Research Institute, National Agricultural and Food Research Organization , 2-1-12 Kannondai, Tsukuba, Ibaraki 305-8642, Japan
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Galleano M, Bernatova I, Puzserova A, Balis P, Sestakova N, Pechanova O, Fraga CG. (-)-Epicatechin reduces blood pressure and improves vasorelaxation in spontaneously hypertensive rats by NO-mediated mechanism. IUBMB Life 2013; 65:710-5. [PMID: 23847022 DOI: 10.1002/iub.1185] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2013] [Accepted: 05/01/2013] [Indexed: 02/05/2023]
Abstract
Studies in humans have found consumption of certain flavanoid-containing foods to be associated with improvement in endothelial function and with reduction of blood pressure (BP). (-)-Epicatechin is a compound representative of the flavanols (a subfamily of flavonoids), abundant in cocoa seeds, which is preserved during the industrialization process to chocolate. The antihypertensive effect of dietary (-)-epicatechin was investigated on spontaneously hypertensive rats (SHRs). Consumption of (-)-epicatechin-supplemented diet (3 g (-)-epicatechin/kg diet) decreased BP in SHR by 27 and 23 mm Hg on days 2 and 6, respectively. On day 6, a 173% increase of nitric oxide synthase (NOS) activity was observed in the aorta of EPI-SHR as compared to nonsupplemented SHR (P < 0.05). Responses to acetylcholine (ACh) were then examined in femoral arteries in the absence and the presence of L-NAME, a nonselective NOS inhibitor, to assess the ACh-mediated relaxation ascribed to NO-dependent and -independent mechanisms. Acetylcholine-induced endothelium-dependent relaxation in the femoral artery was significantly higher in EPI-SHR than in SHR, with a predominance of the NO-dependent component of this relaxation. The endothelium-independent relaxation, assayed by using the NO donor sodium nitroprusside, resulted in nonsignificant difference in the three experimental groups, demonstrating an unaffected function of vascular smooth muscle cells. These results give further support to the concept that (-)-epicatechin can modulate BP in hypertension by increasing NO levels in the vasculature.
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Affiliation(s)
- Monica Galleano
- Physical Chemistry, School of Pharmacy and Biochemistry, University of Buenos Aires-Institute of Biochemistry and Molecular Medicine, National Council of Scientific and Technological Research (CONICET), Buenos Aires, Argentina.
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Kivimäki AS, Siltari A, Ehlers PI, Korpela R, Vapaatalo H. Lingonberry juice lowers blood pressure of spontaneously hypertensive rats (SHR). J Funct Foods 2013. [DOI: 10.1016/j.jff.2013.05.012] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
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Quiñones M, Guerrero L, Suarez M, Pons Z, Aleixandre A, Arola L, Muguerza B. Low-molecular procyanidin rich grape seed extract exerts antihypertensive effect in males spontaneously hypertensive rats. Food Res Int 2013. [DOI: 10.1016/j.foodres.2013.01.023] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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27
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Jiménez R, Duarte J, Perez-Vizcaino F. Epicatechin: endothelial function and blood pressure. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:8823-8830. [PMID: 22440087 DOI: 10.1021/jf205370q] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Epidemiological studies indicate an inverse relationship between flavanol intake and the risk of cardiovascular disease. Potential mechanisms include their effects on endothelial function and hypertension. A number of studies have shown that flavanol-rich cocoa reduces blood pressure and endothelial dysfunction, whereas black tea may have opposite effects. These results highlight the importance of the different effects of the multitude of phytochemical constituents in these foods and the need for studying the individual flavanols. Epicatechin seems to be a major bioactive constituent of cocoa and other flavanol-rich foods and beverages. It has been shown to improve endothelial function in animals and humans. In salt-sensitive animal models of hypertension, epicatechin lowers blood pressure and the associated end-organ damage. Nitric oxide (NO) seems to play a key role in the protection of both hypertension and endothelial dysfunction.
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Affiliation(s)
- Rosario Jiménez
- Department of Pharmacology, School of Pharmacy, Universidad de Granada , 18071 Granada, Spain
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Avances en la etiopatogenia de la hipertensión arterial: actualización en la investigación preclínica. HIPERTENSION Y RIESGO VASCULAR 2012. [DOI: 10.1016/j.hipert.2012.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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