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Lin HH, Tsai CL, Tseng CY, Yu PR, Chiu PY, Hsu CC, Chen JH. Anti-Hypertensive Effect of Solanum muricatum Aiton Leaf Extract In Vivo and In Vitro. PLANT FOODS FOR HUMAN NUTRITION (DORDRECHT, NETHERLANDS) 2024; 79:182-188. [PMID: 38270742 DOI: 10.1007/s11130-024-01146-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/17/2024] [Indexed: 01/26/2024]
Abstract
Hypertension is a global health problem and leads to cardiovascular disease and renal injury. Solanum muricatum Aiton leaf extract, rich in flavonoids, is known for its antioxidant capacity. However, the effects of Solanum muricatum Aiton leaf extract on hypertension combined with inflammatory complications were unknown. This study aimed to investigate the impact of Solanum muricatum Aiton leaf extract on hypertension in vivo and in vitro. In vivo, Solanum muricatum Aiton leaf extract led to decrease high blood pressure, improve heart, aorta, and kidney pathology, and enhance the antioxidative activity in spontaneously hypertensive rats (SHR). Our study demonstrated Solanum muricatum Aiton leaf extract inhibited angiotensin-converting enzyme (ACE), epithelial sodium channel (ENaC), sodium glucose co-transporters-1 (SGLT-1), nuclear factor kappa B (NF-κB), cyclooxygenase-2 (COX-2), inducible nitric oxide synthase (iNOS), tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β), and interleukin-6 (IL-6). In vitro, Solanum muricatum Aiton leaf extract improved the angiotensin II-induced reactive oxygen species (ROS) and mitochondrial membrane depolarization in NRK-52E cells. Besides, Solanum muricatum Aiton leaf extract could also decrease the expressions of ENaC, SGLT-1, and NF-κB in angiotensin II-treated NRK-52E cells. Solanum muricatum Aiton leaf can be suggested as a novel antihypertensive agent ameliorating hypertension via ACE inhibition, inflammation reduction, and ROS. PLE is a novel anti-hypertensive agent to ameliorate hypertension and its complications, including inflammation.
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Affiliation(s)
- Hui-Hsuan Lin
- Department of Medical Laboratory and Biotechnology, Chung Shan Medical University, Taichung City, 40201, Taiwan
| | - Chia-Lin Tsai
- Department of Nutrition, Chung Shan Medical University, Taichung City, 40201, Taiwan
| | - Chiao-Yun Tseng
- Department of Nutrition, Chung Shan Medical University, Taichung City, 40201, Taiwan
| | - Pei-Rong Yu
- Department of Nutrition, Chung Shan Medical University, Taichung City, 40201, Taiwan
| | - Pei-Yu Chiu
- Department of Nutrition, Chung Shan Medical University, Taichung City, 40201, Taiwan
| | - Cheng-Chin Hsu
- Department of Nutrition, Chung Shan Medical University, Taichung City, 40201, Taiwan
| | - Jing-Hsien Chen
- Department of Nutrition, Chung Shan Medical University, Taichung City, 40201, Taiwan.
- Department of Medical Research, Chung Shan Medical University Hospital, Taichung City, 40201, Taiwan.
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Rathod NB, Elabed N, Punia S, Ozogul F, Kim SK, Rocha JM. Recent Developments in Polyphenol Applications on Human Health: A Review with Current Knowledge. PLANTS (BASEL, SWITZERLAND) 2023; 12:plants12061217. [PMID: 36986905 PMCID: PMC10053535 DOI: 10.3390/plants12061217] [Citation(s) in RCA: 27] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 03/04/2023] [Accepted: 03/06/2023] [Indexed: 06/01/2023]
Abstract
Polyphenol has been used in treatment for some health disorders due to their diverse health promoting properties. These compounds can reduce the impacts of oxidation on the human body, prevent the organs and cell structure against deterioration and protect their functional integrity. The health promoting abilities are attributed to their high bioactivity imparting them high antioxidative, antihypertensive, immunomodulatory, antimicrobial, and antiviral activity, as well as anticancer properties. The application of polyphenols such as flavonoids, catechin, tannins, and phenolic acids in the food industry as bio-preservative substances for foods and beverages can exert a superb activity on the inhibition of oxidative stress via different types of mechanisms. In this review, the detailed classification of polyphenolic compunds and their important bioactivity with special focus on human health are addressed. Additionally, their ability to inhibit SARS-CoV-2 could be used as alternative therapy to treat COVID patients. Inclusions of polyphenolic compounds in various foods have demonstrated their ability to extend shelf life and they positive impacts on human health (antioxidative, antihypertensive, immunomodulatory, antimicrobial, anticancer). Additionally, their ability to inhibit the SARS-CoV-2 virus has been reported. Considering their natural occurrence and GRAS status they are highly recommended in food.
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Affiliation(s)
- Nikheel Bhojraj Rathod
- Post-Graduate Institute of Post-Harvest Technology and Management, Dr. Balasaheb Sawant Konkan Krishi Vidyapeeth, Roha 402 116, India
| | - Nariman Elabed
- Laboratory of Protein Engineering and Bioactive Molecules (LIP-MB), National Institute of Applied Sciences and Technology (INSAT), University of Carthage, BP 77-1054 Amilcar, Carthage 1054, Tunisia
| | - Sneh Punia
- Department of Food, Nutrition and Packaging Sciences, Clemoson University, Clemosn, SC 29634, USA
| | - Fatih Ozogul
- Department of Seafood Processing Technology, Faculty of Fisheries, Cukurova University, 01330 Adana, Turkey
- Biotechnology Research and Application Center, Cukurova University, 01330 Adana, Turkey
| | - Se-Kwon Kim
- Department of Marine Science & Convergence Engineering, College of Science & Technology, Hanyang University, ERICA Campus, Ansan 11558, Republic of Korea
| | - João Miguel Rocha
- LEPABE—Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
- ALiCE—Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
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Yorsin S, Sriwiriyajan S, Chongsa W. Vasorelaxing effect of Garcinia cowa leaf extract in rat thoracic aorta and its underlying mechanisms. J Tradit Complement Med 2022; 13:219-225. [PMID: 37128198 PMCID: PMC10148127 DOI: 10.1016/j.jtcme.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 11/28/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022] Open
Abstract
Background and aim The leaves of Garcinia cowa (G. cowa) are used in Thai traditional medicine to improve blood circulation. However, there is no scientific evidence to confirm this therapeutic claim. Here, we investigated the vasorelaxing effect and its underlying mechanisms of an aqueous extract of G. cowa leaves in rat thoracic aortic rings. Materials and methods Dried leaves of G. cowa were extracted with water, followed by phytochemical analysis. Vascular reactivity experiments were performed in isolated rat thoracic aortic rings using an organ bath system. The results were recorded using the data acquisition system Power Lab. Results Phytochemical analysis showed that the leaves of G. cowa are rich in polyphenols and flavonoids, especially kaempferol, vitexin, and isovitexin. The G. cowa leaf extract caused a concentration-dependent relaxation of aortic rings. This effect was attenuated by denudation of the endothelium, or by pre-treatment of the aortic rings with l-NAME, ODQ, indomethacin, or glibenclamide, but not with TEA. Conclusion This study indicates that G. cowa leaf extract induces vasorelaxation through both endothelium-dependent and endothelium-independent manners. Its mechanism of action mainly involves the production of nitric oxide and prostanoids, as well as opening ATP-sensitive K+ channels. The vasorelaxing effect of G. cowa leaf extract is probable promoted by the action of flavonoids.
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Cao Y, Xie L, Liu K, Liang Y, Dai X, Wang X, Lu J, Zhang X, Li X. The antihypertensive potential of flavonoids from Chinese Herbal Medicine: A review. Pharmacol Res 2021; 174:105919. [PMID: 34601080 DOI: 10.1016/j.phrs.2021.105919] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 09/26/2021] [Accepted: 09/28/2021] [Indexed: 12/11/2022]
Abstract
With the coming of the era of the aging population, hypertension has become a global health burden to be dealt with. Although there are multiple drugs and procedures to control the symptoms of hypertension, the management of it is still a long-term process, and the side effects of conventional drugs pose a burden on patients. Flavonoids, common compounds found in fruits and vegetables as secondary metabolites, are active components in Chinese Herbal Medicine. The flavonoids are proved to have cardiovascular benefits based on a plethora of animal experiments over the last decade. Thus, the flavonoids or flavonoid-rich plant extracts endowed with anti-hypertension activities and probable mechanisms were reviewed. It has been found that flavonoids may affect blood pressure in various ways. Moreover, despite the substantial evidence of the potential for flavonoids in the control of hypertension, it is not sufficient to support the clinical application of flavonoids as an adjuvant or core drug. So the synergistic effects of flavonoids with other drugs, pharmacokinetic studies, clinical trials and the safety of flavonoids are also incorporated in the discussion. It is believed that more breakthrough studies are needed. Overall, this review may shed some new light on the explicit recognition of the mechanisms of anti-hypertension actions of flavonoids, pointing out the limitations of relevant research at the current stage and the aspects that should be strengthened in future researches.
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Affiliation(s)
- Yi Cao
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, PR China
| | - Long Xie
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, PR China
| | - Kai Liu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, PR China
| | - Youdan Liang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, PR China
| | - Xiaolin Dai
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, PR China
| | - Xian Wang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, PR China
| | - Jing Lu
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, PR China
| | - Xumin Zhang
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, PR China
| | - Xiaofang Li
- School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, PR China.
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Mechanisms involved in the endothelium-dependent vasodilatory effect of an ethyl acetate fraction of Cyathea phalerata Mart. in isolated rats’ aorta rings. J Tradit Complement Med 2020; 10:360-365. [PMID: 32695653 PMCID: PMC7365778 DOI: 10.1016/j.jtcme.2019.04.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 03/21/2019] [Accepted: 04/01/2019] [Indexed: 12/19/2022] Open
Abstract
The species Cyathea phalerata Mart. is a tree fern, commonly known as “xaxim”, which is found in tropical and subtropical areas of Brazil. The present study investigated the mechanisms related with the vasorelaxant effects of an Ethyl Acetate Fraction (EAF) obtained from C. phalerata in rats’ thoracic aorta rings. In pre-contracted vessels, EAF (0.1–1000 μg/mL) caused a concentration-dependent relaxation. The endothelium denudation, the nitric oxide (NO) synthase and guanylyl cyclase inhibitor reduced the vasodilation, indicating the participation of NO/cGMP pathway in its effect. The relaxation of EAF was abolished in the absence of extracellular Ca2+ and was significantly decreased in the presence of Ca2+ entry blocker, suggesting that Ca2+ influx plays an important role in EAF effect and probably in eNOS activity. However, the PI3K/Akt pathway is not responsible for eNOS phosphorylation/activation. The vasodilator effect of EAF was partially inhibited by KCl 40 mM and almost totally abolished with L-NOARG + KCl 40 mM, indicating also the role of hyperpolarization in its effect. Calcium activated K+ channels are not involved in the EAF-induced hyperpolarization. The COX inhibitor, indomethacin, slightly reduced the vasodilation induced by EAF. In addition, EAF did not alter the relaxant effects of NO-donor, indicating that the relaxant activity cannot be attributed to free radical-scavenging properties. In conclusion, the present study showed that the EAF, causes an endothelium-dependent vasorelaxant effect in aorta that mainly involves the NO-cGMP pathway, hyperpolarization and prostanoids. The vasorelaxant activity of EAF can be attributed to the occurrence of polyphenol compounds. An ethyl acetate fraction obtained from Cyathea phalerata induces vasodilatation. EAF induced relaxation by an endothelium-dependent mechanism. EAF increases the NO production and hyperpolarization that evoke vasodilation.
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Yamagata K. Polyphenols Regulate Endothelial Functions and Reduce the Risk of Cardiovascular Disease. Curr Pharm Des 2020; 25:2443-2458. [PMID: 31333108 DOI: 10.2174/1381612825666190722100504] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 07/20/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND Previous studies have shown that intake of polyphenols through the consumption of vegetables and fruits reduces the risk of Cardiovascular Disease (CVD) by potentially influencing endothelial cell function. OBJECTIVE In this review, the effects and molecular mechanisms of plant polyphenols, particularly resveratrol, epigallocatechin gallate (EGCG), and quercetin, on endothelial functions, and their putative protective effects against CVD are described. METHODS Epidemiologic studies examined the effect of the CVD risk of vegetables and the fruit. Furthermore, studies within vitro models investigated the underlying molecular mechanisms of the action of the flavonoid class of polyphenols. These findings help elucidate the effect of polyphenols on endothelial function and CVD risk reduction. RESULTS Epidemiologic and in vitro studies have demonstrated that the consumption of vegetables and fruits decreases the incidence of CVDs. Furthermore, it has also been indicated that dietary polyphenols are inversely related to the risk of CVD. Resveratrol, EGCG, and quercetin prevent oxidative stress by regulating the expression of oxidase and the antioxidant enzyme genes, contributing to the prevention of stroke, hypertension, heart failure, and ischemic heart disease. CONCLUSION High intake of dietary polyphenols may help prevent CVD. Polyphenols inhibit endothelial dysfunction and induce vascular endothelium-dependent vascular relaxation viz. redox regulation and nitric oxide production. The polyphenol-induced healthy endothelial cell function may be related to CVD prevention.
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Affiliation(s)
- Kazuo Yamagata
- Laboratory of Molecular Health Science of Food, Department of Food Science & Technology, Nihon University (NUBS), 1866 Kameino, Fujisawa, Kanagawa, 252-8510, Japan
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Calfío C, Huidobro-Toro JP. Potent Vasodilator and Cellular Antioxidant Activity of Endemic Patagonian Calafate Berries ( Berberis microphylla) with Nutraceutical Potential. Molecules 2019; 24:E2700. [PMID: 31349544 PMCID: PMC6695892 DOI: 10.3390/molecules24152700] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 07/04/2019] [Accepted: 07/05/2019] [Indexed: 11/16/2022] Open
Abstract
Hydroalcoholic extracts of Patagonian Calafate berry (Berberis microphylla) contain mono or disaccharide conjugated anthocyanins and flavonols. The Liquid Chromatography-Mass Spectrometry (LC-MS) chemical extract profile identified glycosylated anthocyanidins such as delphinidin-, petunidin- and malvidin-3-glucoside as the major constituents. The predominant flavonols were 3-O substituents quercetin-rutinoside or -rhamnoside. Anthocyanins doubled flavonols in mass (13.1 vs. 6 mg/g extract). Polyphenols vascular actions were examined in the rat arterial mesenteric bed bioassay; extract perfusion elicited concentration-dependent vasodilatation mimicked by conjugated anthocyanins standards. Vascular responses of main glycosylated anthocyanins were endothelium-dependent (p < 0.001) and mediated by NO production (p < 0.05). The anthocyanins antioxidant activity determined in isolated endothelial cells (CAA) showed a reduced redox potential as compared to the extract or quercetin. While in the 2,2-Diphenyl-1-picrylhydrazyl (DPPH) assay, the anthocyanins showed an equivalent quercetin potency, the extract was 15-fold less active, proposing that the anthocyanin-induced vasodilation is not due to an antioxidant mechanism. The extract shows promising commercial nutraceutical potential.
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Affiliation(s)
- Camila Calfío
- Laboratorio de Farmacología, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile.
| | - Juan Pablo Huidobro-Toro
- Laboratorio de Farmacología, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago 9170022, Chile
- Centro para el Desarrollo de Nanociencia y Nanotecnología (CEDENNA), Universidad de Santiago de Chile, Santiago 9170022, Chile
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Mahobiya A, Singh TU, Rungsung S, Kumar T, Chandrasekaran G, Parida S, Kumar D. Kaempferol-induces vasorelaxation via endothelium-independent pathways in rat isolated pulmonary artery. Pharmacol Rep 2018; 70:863-874. [DOI: 10.1016/j.pharep.2018.03.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Revised: 11/17/2017] [Accepted: 03/20/2018] [Indexed: 12/18/2022]
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Figueiredo EAD, Alves NFB, Monteiro MMDO, Cavalcanti CDO, Silva TMSD, Silva TMGD, Braga VDA, Oliveira EDJ. Antioxidant and Antihypertensive Effects of a Chemically Defined Fraction of Syrah Red Wine on Spontaneously Hypertensive Rats. Nutrients 2017; 9:nu9060574. [PMID: 28587200 PMCID: PMC5490553 DOI: 10.3390/nu9060574] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 03/06/2017] [Accepted: 03/07/2017] [Indexed: 12/11/2022] Open
Abstract
A particularly phenolic-rich fraction extracted from red wine from the São Francisco valley (Northeastern Brazil) was chemically characterized and its hypotensive and antioxidant effects on spontaneously hypertensive rats were studied both in vitro and in vivo. The liquid-liquid pH dependent fractionation scheme afforded a fraction with high content of bioactive phenolics such as flavonols, flavonol glycosides, phenolic acids and anthocyanins, whose identities were confirmed by liquid chromatography coupled to mass spectrometry analysis. Pretreatment of spontaneously hypertensive rats with this wine fraction at doses of 50 and 100 mg/kg by gavage for 15 days was able to decrease mean arterial pressure and heart rate as well as decrease serum lipid peroxidation. The fraction at concentrations of 0.01–1000 µg/mL induced concentration-dependent relaxation of isolated rat superior mesenteric artery rings pre-contracted with phenylephrine and this effect was not attenuated by endothelium removal. Our results demonstrate it is possible for phenolic constituents of red wine that are orally bioavailable to exert in vivo hypotensive and antioxidant effects on intact endothelial function.
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Affiliation(s)
- Eugênia Abrantes de Figueiredo
- Centro de Biotecnologia, Programa de Pós Graduação em Produtos Naturais e Sintéticos Bioativos, Campus I, João Pessoa, PB 58051-970, Brazil.
| | - Naiane Ferraz Bandeira Alves
- Centro de Biotecnologia, Programa de Pós Graduação em Produtos Naturais e Sintéticos Bioativos, Campus I, João Pessoa, PB 58051-970, Brazil.
| | - Matheus Morais de Oliveira Monteiro
- Centro de Biotecnologia, Programa de Pós Graduação em Produtos Naturais e Sintéticos Bioativos, Campus I, João Pessoa, PB 58051-970, Brazil.
| | - Clenia de Oliveira Cavalcanti
- Centro de Biotecnologia, Programa de Pós Graduação em Produtos Naturais e Sintéticos Bioativos, Campus I, João Pessoa, PB 58051-970, Brazil.
| | - Tania Maria Sarmento da Silva
- Departamento de Química, Laboratório de Bioprospecção Fitoquímica, Universidade Federal Rural de Pernambuco, Recife, PE 52171-900, Brazil.
| | - Telma Maria Guedes da Silva
- Departamento de Química, Laboratório de Bioprospecção Fitoquímica, Universidade Federal Rural de Pernambuco, Recife, PE 52171-900, Brazil.
| | - Valdir de Andrade Braga
- Centro de Biotecnologia, Programa de Pós Graduação em Produtos Naturais e Sintéticos Bioativos, Campus I, João Pessoa, PB 58051-970, Brazil.
| | - Eduardo de Jesus Oliveira
- Departamento de Farmácia, Universidade Federal dos Vales do Jequitinhonha e Mucurí, Diamantina, MG, 39100-000, Brazil.
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Hu S, Zhang X, Chen F, Wang M. Dietary polyphenols as photoprotective agents against UV radiation. J Funct Foods 2017. [DOI: 10.1016/j.jff.2017.01.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
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Wang YP, Wat E, Koon CM, Wong CW, Cheung DWS, Leung PC, Zhao QS, Fung KP, Lau CBS. The beneficial potential of polyphenol-enriched fraction from Erigerontis Herba on metabolic syndrome. JOURNAL OF ETHNOPHARMACOLOGY 2016; 187:94-103. [PMID: 27125589 DOI: 10.1016/j.jep.2016.04.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 03/29/2016] [Accepted: 04/23/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Erigerontis Herba is a Chinese herb that is traditionally used to treat cardiovascular disease. Recent literatures suggested that it could exert beneficial effects on various cardiovascular metabolic risk factors including hypertension and hyperlipidemia in order to exert its cardio-protective effects. AIM Erigerontis Herba contains a variety of flavonoids and polyphenols that are bioactive. The aim of the present study was to investigate the cardio-protective effects of the total polyphenols of Erigerontis Herba (EHP), particularly on the metabolic parameters which could contribute to metabolic syndrome including obesity, hepatic steatosis, hyperlipidemia and hypertension. MATERIALS AND METHODS C57Bl/6 metabolic syndrome mice model was used to determine the effects of EHP on metabolic syndrome. High-fat diet-induced metabolic syndrome in C57Bl/6 mice is an animal model which mimics human metabolic syndrome. The model is achieved by high-fat diet feeding to C57Bl/6 mice for 8 weeks. In our study, the mice were divided into 3 groups and fed for 8 weeks with: 1) normal chow (N); 2) high-fat diet (HF); or 3) high-fat diet supplemented with 2% EHP (HF+EHP). Various parameters such as body weight, adipose tissue weight and liver weight were measured. Liver and plasma lipid levels were also determined. In addition, the effect of EHP on vasodilation in Sprague Dawley rats was also determined using ex vivo aortic ring model. RESULTS Various types of adipose tissues weights were significantly lowered in HF+EHP vs HF mice. Hepatic lipid levels were also significantly decreased by EHP vs HF. For plasma lipid (including TC and TG), EHP exerted no significant effects on plasma lipid levels. To understand the mechanisms as to how EHP regulated lipid metabolism via liver, various hepatic gene expressions were also measured using real-time PCR. The results showed that EHP regulated the expressions of Cyp7α1, CD36 and PPAR-γ. EHP showed significant vasodilative effects in both intact aortas and endothelium-removed aortas. Further mechanistic studies indicated that EHP dilated aorta endothelium-dependently through nitric oxide synthase (NOS) pathway, and endothelium-independently through BKca, Kv and Kir channels. In addition to the vasodilative effects, EHP could also inhibit aorta contraction through Ca(2+) channel. CONCLUSIONS EHP exerted promising effects on diet-induced obesity and hepatic steatosis in C57Bl/6 mice model. It also exerted significant vasodilative effect ex vivo, suggesting the potential of EHP to be developed as a dietary supplement for metabolic syndrome.
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Affiliation(s)
- Yan Ping Wang
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China
| | - Elaine Wat
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China
| | - Chi Man Koon
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China
| | - Chun Wai Wong
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China
| | - David Wing Shing Cheung
- School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China
| | - Ping Chung Leung
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China
| | - Qin Shi Zhao
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, PR China
| | - Kwok Pui Fung
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China; School of Biomedical Sciences, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China
| | - Clara Bik San Lau
- Institute of Chinese Medicine, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China; State Key Laboratory of Phytochemistry and Plant Resources in West China, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, PR China.
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Ekpenyong CE, Akpan E, Nyoh A. Ethnopharmacology, phytochemistry, and biological activities of Cymbopogon citratus (DC.) Stapf extracts. Chin J Nat Med 2016; 13:321-37. [PMID: 25986281 DOI: 10.1016/s1875-5364(15)30023-6] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Cymbopogon citratus is a widely distributed perennial herb belonging to the Poaceae family and has been extensively consumed for its medicinal, cosmetic, and nutritional effects for centuries. A large number of reports have been published describing the pharmacological, biological, and therapeutic actions of this herb. In this review, we summarized the literatures on related studies (up to January, 2014) that highlighted the pharmacologic and biological effects of the major phytochemicals isolated from C. citratus extracts and its essential oil. The components of the essential oils found in C. citratus have a similar pharmacokinetic properties, including absorption, distribution, metabolism, and excretion. They are quickly absorbed following oral, pulmonary, and dermal administration. Based on the published reports, it can also be inferred that, after absorption from the small intestine, some phytochemicals in C. citratus can undergo oxidation, glucuronidation, sulfation, and/or O-methylation. Excretion is through urine, feces and/or expired volatiles. The biotransformation reactions of C. citratus bioactive constituents are essential for its relatively safe consumption and therapeutic applications. The data available so far warrant further studies evaluating C. citratus pharmacokinetics. Reliable pharmacokinetic data in humans would be critical for a better understanding of the the systemic handling of C. citratus.
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Affiliation(s)
- Christopher E Ekpenyong
- Department of Physiology, Faculty of Basic Medical Sciences, University of Uyo, Uyo Nigeria.
| | - Ernest Akpan
- Department of Physiology, Faculty of Basic Medical Sciences, University of Uyo, Uyo Nigeria
| | - Azah Nyoh
- Department of Physiology, Faculty of Basic Medical Sciences, University of Calabar, Calabar, Nigeria
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Moreno-Montoro M, Olalla-Herrera M, Gimenez-Martinez R, Navarro-Alarcon M, Rufián-Henares JA. Phenolic compounds and antioxidant activity of Spanish commercial grape juices. J Food Compost Anal 2015. [DOI: 10.1016/j.jfca.2014.10.001] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Brandão CC, Asquieri ER, Attaran S, Damiani C. Study of the aging of fermented of yacon (Smallanthus sonchifolius) and sensory profile and acceptance. FOOD SCIENCE AND TECHNOLOGY 2014. [DOI: 10.1590/s0101-20612014005000032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Ziberna L, Kim JH, Auger C, Passamonti S, Schini-Kerth V. Role of endothelial cell membrane transport in red wine polyphenols-induced coronary vasorelaxation: involvement of bilitranslocase. Food Funct 2014; 4:1452-6. [PMID: 23963285 DOI: 10.1039/c3fo60160a] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Red wine polyphenols (RWP) induce nitric oxide (NO) and endothelium-derived hyperpolarization (EDH)-mediated coronary vasodilatation involving the redox-sensitive PI3-kinase/Akt-dependent pathway in the endothelium. However, there is a gap of knowledge in explaining how bioactive polyphenols initialize their signalling pathway in endothelial cells. Here, we investigated the hypothesis that flavonoids act subsequently to their entry into the endothelium via the flavonoid membrane transporter bilitranslocase (TC 2.A.65.1.1). Thus, vascular reactivity studies were performed using isolated porcine coronary artery rings. We separately determined the NO- and EDH-mediated components of the relaxation in the presence of specific inhibitors. In either case, bilitranslocase antibodies significantly reduced the relaxations of coronary artery rings induced by RWP. Furthermore, bilitranslocase antibodies significantly reduced RWP-induced phosphorylation levels of Akt and eNOS, assessed in cultured endothelial cells from porcine coronary arteries by Western blot analysis. The present findings indicate that bilitranslocase-mediated membrane transport substantially contributes to the initial step of RWP-induced coronary vasodilatation.
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Affiliation(s)
- Lovro Ziberna
- Department of Life Sciences, University of Trieste, via L. Giorgieri 1, 34127 Trieste, Italy.
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Vasodilator compounds derived from plants and their mechanisms of action. Molecules 2013; 18:5814-57. [PMID: 23685938 PMCID: PMC6270466 DOI: 10.3390/molecules18055814] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2013] [Revised: 04/24/2013] [Accepted: 05/07/2013] [Indexed: 12/31/2022] Open
Abstract
The present paper reviews vasodilator compounds isolated from plants that were reported in the past 22 years (1990 to 2012) and the different mechanisms of action involved in their vasodilator effects. The search for reports was conducted in a comprehensive manner, intending to encompass those metabolites with a vasodilator effect whose mechanism of action involved both vascular endothelium and arterial smooth muscle. The results obtained from our bibliographic search showed that over half of the isolated compounds have a mechanism of action involving the endothelium. Most of these bioactive metabolites cause vasodilation either by activating the nitric oxide/cGMP pathway or by blocking voltage-dependent calcium channels. Moreover, it was found that many compounds induced vasodilation by more than one mechanism. This review confirms that secondary metabolites, which include a significant group of compounds with extensive chemical diversity, are a valuable source of new pharmaceuticals useful for the treatment and prevention of cardiovascular diseases.
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Mahn A, Reyes A. An overview of health-promoting compounds of broccoli (Brassica oleracea var. italica) and the effect of processing. FOOD SCI TECHNOL INT 2013; 18:503-14. [PMID: 23175779 DOI: 10.1177/1082013211433073] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Broccoli offers many heath-promoting properties owing to its content of antioxidant and anticarcinogenic compounds. The concentration and bioavailability of polyphenols, glucosinolates, sulforaphane and selenium depend on plant biochemistry, cultivation strategy and type of processing. In this article, the main biochemical properties of broccoli are reviewed regarding their health-promoting effects. Additionally, the way these properties are affected by processing is discussed. Steaming and drying result in an apparent increment of sulforaphane content as well as antioxidant activity, most likely due to an increase of the extractability of antioxidants and sulforaphane. Freezing and boiling diminish polyphenols concentration, mainly due to volatilization and leaching into the cooking water. In view of these results, the optimization of broccoli processing in order to maximize the content of bioactive compounds should be possible. The effect of processing on selenium compounds has been poorly studied so far, and therefore this topic should be investigated in the future. Finally, the effect of operating conditions in different drying processes on the content of bioactive compounds in broccoli should be investigated in a greater depth.
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Affiliation(s)
- Andrea Mahn
- Universidad de Santiago de Chile, Santiago, Chile.
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Rodriguez-Rodriguez R, Justo ML, Claro CM, Vila E, Parrado J, Herrera MD, Alvarez de Sotomayor M. Endothelium-dependent vasodilator and antioxidant properties of a novel enzymatic extract of grape pomace from wine industrial waste. Food Chem 2012; 135:1044-51. [DOI: 10.1016/j.foodchem.2012.05.089] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2012] [Revised: 05/07/2012] [Accepted: 05/23/2012] [Indexed: 10/28/2022]
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Krepsky PB, Isidório RG, de Souza Filho JD, Côrtes SF, Braga FC. Chemical composition and vasodilatation induced by Cuphea carthagenensis preparations. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2012; 19:953-957. [PMID: 22739415 DOI: 10.1016/j.phymed.2012.05.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Revised: 04/04/2012] [Accepted: 05/14/2012] [Indexed: 06/01/2023]
Abstract
The aerial parts of Cuphea carthagenensis (Jacq.) J.F. Macbride (Lythraceae) are traditionally employed in Brazil to treat cardiovascular diseases. The aim of this study was to compare preparations of C. carthagenensis aerial parts (aqueous and ethanol extracts, together with derived fractions) with regard to their total phenolic contents and in vitro vasodilating activity. The main flavonoids found in the extracts were isolated and identified as quercetin derivatives. The extracts and fractions showed similar HPLC profiles with the presence of quercetin-5-O-β-glucopyranoside, quercetin-3-O-α-arabinofuranoside and quercetin-3-sulfate in all of them, but marked differences in the contents of flavonoids, proanthocyanidins, tannis and total phenolics. Excepting the aqueous extract, all assayed preparations elicited vasodilatation on pre-contracted rat aortic rings in the range of pIC(50) 4.53±0.03 to 4.98±0.06. Polynomial regression analysis demonstrated the relationship between vasodilating activity and the contents of flavonoids (r(2)=0.5190), proanthocyanidins (r(2)=0.8016), tannins (r(2)=0.8041) and total phenolics (r(2)=0.6226), suggesting the participation of these compounds in the pharmacological effect and their potential use as chemical markers for the species.
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Affiliation(s)
- Patricia Baier Krepsky
- Department of Pharmaceutical Products, Faculty of Pharmacy, Universidade Federal de Minas Gerais, Av. Antônio Carlos, 6627, 31.270-901 Belo Horizonte, Brazil
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Ma Z, Liu T. Myricetin facilitates potassium currents and inhibits neuronal activity of PVN neurons. Neurochem Res 2012; 37:1450-6. [PMID: 22382814 DOI: 10.1007/s11064-012-0732-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2011] [Revised: 02/01/2012] [Accepted: 02/15/2012] [Indexed: 10/28/2022]
Abstract
The effects of myricetin on hypothalamic paraventricular nucleus (PVN) neurons in rats were investigated. By whole-cell patch clamp detection in hypothalamic brain slices, we showed that the action potential frequency in type-I PVN neurons dose-dependently decreased after myricetin treatment. Further studies demonstrated that myricetin may enhance potassium currents and shifts the voltage-dependence of activation of potassium currents to more negative potentials by 6.07 mV. Using calcium free/cadmium perfusion solution could reverse myricetin-induced enhancement of potassium currents in PVN neurons. These results suggested that inhibition of hypothalamic PVN neurons by myricetin might be attributed to the enhancement of potassium currents.
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Affiliation(s)
- ZeGang Ma
- Department of Physiology, Shandong Provincial Key Laboratory of Pathogenesis and Prevention of Neurological Disorders and State Key Disciplines: Physiology, Medical College of Qingdao University, Qingdao, 266071, China.
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Behgar M, Ghasemi S, Naserian A, Borzoie A, Fatollahi H. Gamma radiation effects on phenolics, antioxidants activity and in vitro digestion of pistachio (Pistachia vera) hull. Radiat Phys Chem Oxf Engl 1993 2011. [DOI: 10.1016/j.radphyschem.2011.04.016] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
In contrast to the intact wine, cardiovascular effects of the thermally treated wine have not been studied, despite widespread habits of cooking with wine and consumption of mulled wine. Vasodilatory effects of the red wine heated at 75 and 125°C were examined in the isolated rat and guinea pig aorta and compared with the intact and wine dealcoholized without thermal stress. Samples were analyzed for their phenolic content, antioxidant capacity, resveratrol and ethanol contents. Heating-induced degradation of individual phenolic fraction was observed only in the samples treated at 125°C, although total phenolic concentration and related antioxidant activity increased in the thermally treated samples due to the reduction in their volume. All wine samples regardless of treatment caused similar maximal relaxation in both species, but the response was stronger in aortas from guinea pigs. At the lowest concentrations up to 1‰, dealcoholized wine produced vasodilation greater than that produced by intact wine and wines treated at 75 and 125°C, which showed similar vasodilating activity at all concentrations. Our results indicate that wine thermally treated under heating conditions applicable to the preparation of a mulled wine and cooking with wine largely retains vasodilatory activity in vitro despite significant heat-induced changes in its composition.
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Leeya Y, Mulvany MJ, Queiroz EF, Marston A, Hostettmann K, Jansakul C. Hypotensive activity of an n-butanol extract and their purified compounds from leaves of Phyllanthus acidus (L.) Skeels in rats. Eur J Pharmacol 2010; 649:301-13. [PMID: 20868659 DOI: 10.1016/j.ejphar.2010.09.038] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Revised: 07/26/2010] [Accepted: 09/14/2010] [Indexed: 10/19/2022]
Abstract
We aimed to investigate the effects, identify the active substances and establish the mechanisms involved in the hypotensive activity of an n-butanol extract from leaves of Phyllanthus acidus (PA extract). PA extract caused a decrease in blood pressure of anesthetized rats that was not modified by atropine or propranolol. PA extract caused a persistent dilatation of thoracic aortic rings preconstricted with either phenylephrine or KCl, and these effects were not modified by LNA or removal of the vascular endothelium. For phenylephrine-preconstricted aortic rings, the dilatory activity of the PA extract was not modified by atropine, propranolol or indomethacin. TEA, glybenclamide or ODQ significantly inhibited the dilatory activity of the PA extract on endothelium-denuded aortic rings. Nifedipine or a Ca(2+)-free medium depressed the aortic rings constrictor response to phenylephrine, and that was further augmented by the PA extract. Adenosine, 4-hydroxybenzoic acid, caffeic acid, hypogallic acid, and kaempferol were isolated from the PA extract. Each caused a decrease in blood pressure and dilatation of the aortic rings. LNA or removal of the endothelium reduced this activity. ODQ and TEA attenuated the vasodilatory activity of adenosine whereas glybenclamide and ODQ attenuated the effect of hypogallic acid. These results suggest that the hypotensive activities of the PA extract is likely the result of the direct action of these five compounds on the blood vessels by stimulating release of nitric oxide from the vascular endothelium, in part through stimulation of soluble guanylate cyclase, and opening of K(ATP) and K(Ca) channels in the vascular smooth muscle.
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Affiliation(s)
- Yuttapong Leeya
- Department of Physiology, Faculty of Science, Prince of Songkla University, Hat-Yai, 90112, Thailand
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Flavonoid intake and disability-adjusted life years due to Alzheimer’s and related dementias: a population-based study involving twenty-three developed countries. Public Health Nutr 2010; 13:1403-9. [DOI: 10.1017/s1368980009992990] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
AbstractObjectiveDietary flavonoids and their metabolites may have neuroprotective effects against age-associated neurodegenerative disorders such as Alzheimer’s and related dementias (dementia). There is a lack of population studies, however, on correlations between flavonoid intake and dementia. The main objective of the present study was to analyse such a relationship at a large-scale population level.DesignBased on global data (FAO, WHO), databases were generated for: (i) flavonoid content of foods; (ii) per capita national dietary intakes of flavonoids and other dietary factors; and (iii) disability-adjusted life years – a measure of burden and death – due to dementia. Five major flavonoid subclasses were examined. To minimize influences due to accuracy and reliability of the disease source data, twenty-three developed countries were selected after statistical evaluation.ResultsFlavonols and combined flavonoids (all five combined) intakes were the only two parameters with significant (P < 0·05) negative dementia correlations. Multiple linear regression models confirmed this relationship, and excluded confounding from some other dietary and non-dietary factors. Similar analyses with non-dementia, neurological/psychiatric diseases did not yield significant correlations.ConclusionsAt a global level, and in the context of different genetic backgrounds, our results suggest that higher consumption of dietary flavonoids, especially flavonols, is associated with lower population rates of dementia in these countries.
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Schini-Kerth VB, Auger C, Etienne-Selloum N, Chataigneau T. Polyphenol-induced endothelium-dependent relaxations role of NO and EDHF. ADVANCES IN PHARMACOLOGY (SAN DIEGO, CALIF.) 2010; 60:133-75. [PMID: 21081218 DOI: 10.1016/b978-0-12-385061-4.00006-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The Mediterranean diet has been associated with greater longevity and quality of life in epidemiological studies. Indeed, because of the abundance of fruits and vegetables and a moderate consumption of wine, the Mediterranean diet provides high amounts of polyphenols thought to be essential bioactive compounds that might provide health benefits in terms of cardiovascular diseases and mortality. Several polyphenol-rich sources, such as grape-derived products, cocoa, and tea, have been shown to decrease mean blood pressure in patients with hypertension. The improvement of the endothelial function is likely to be one of the mechanisms by which polyphenols may confer cardiovascular protection. Indeed, polyphenols are able to induce nitric oxide (NO)-mediated endothelium-dependent relaxations in a large number of arteries including the coronary artery; they can also induce endothelium-derived hyperpolarizing factor (EDHF)-mediated relaxations in some of these arteries. Altogether, these mechanisms might contribute to explain the antihypertensive and cardio-protective effects of polyphenols in vivo. The aim of this review was to provide a nonexhaustive analysis of the effect of several polyphenol-rich sources and isolated compounds on the endothelium in in vitro, ex vivo, and in vivo models as well as in humans.
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Affiliation(s)
- Valérie B Schini-Kerth
- Laboratoire de Biophotonique et Pharmacologie, UMR 7213 CNRS, Université de Strasbourg, Faculté de Pharmacie, Illkirch, France
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26
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Schmitt CA, Dirsch VM. Modulation of endothelial nitric oxide by plant-derived products. Nitric Oxide 2009; 21:77-91. [DOI: 10.1016/j.niox.2009.05.006] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 04/28/2009] [Accepted: 05/26/2009] [Indexed: 12/31/2022]
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Yordanov M, Dimitrova P, Patkar S, Saso L, Ivanovska N. Inhibition of Candida albicans extracellular enzyme activity by selected natural substances and their application inCandidainfection. Can J Microbiol 2008; 54:435-40. [DOI: 10.1139/w08-029] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Extracellular enzymes secreted by Candida albicans are claimed to be virulence factors responsible for penetration of the yeast into host cells. Substances able to inhibit lipolytic and proteinase activities of the fungus might be of therapeutic use in some pathologic conditions caused by C. albicans. In the present work, we have tested the influence of the flavonoid compounds apigenin and kaempferol, the indole alkaloid ibogaine, and the protoberberine alkaloid berberine on the in vitro enzyme activity of C. albicans. The substances showed complex suppressive effects concerning the processes of adherence to epithelial cells, secreted aspartyl proteinase activity, and the rate of cell wall protein glycosylation. Apigenin and kaempferol were administered in systemic C. albicans infection, demonstrating an increased number of survivors by kaempferol. The application of apigenin, kaempferol, ibogaine, and berberine in cutaneous infection suppressed the symptoms and accelerated elimination of the yeast from the site of inoculation.
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Affiliation(s)
- M. Yordanov
- Department of Immunology, Institute of Microbiology, 26 G. Bonchev Street, 1113 Sofia, Bulgaria
- Novozymes A/S, Novo Allé, DK-2880, Bagsvaerd, Denmark
- Department of Human Physiology and Pharmacology “Vittorio Erspamer”, University of Rome “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy
| | - P. Dimitrova
- Department of Immunology, Institute of Microbiology, 26 G. Bonchev Street, 1113 Sofia, Bulgaria
- Novozymes A/S, Novo Allé, DK-2880, Bagsvaerd, Denmark
- Department of Human Physiology and Pharmacology “Vittorio Erspamer”, University of Rome “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy
| | - S. Patkar
- Department of Immunology, Institute of Microbiology, 26 G. Bonchev Street, 1113 Sofia, Bulgaria
- Novozymes A/S, Novo Allé, DK-2880, Bagsvaerd, Denmark
- Department of Human Physiology and Pharmacology “Vittorio Erspamer”, University of Rome “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy
| | - L. Saso
- Department of Immunology, Institute of Microbiology, 26 G. Bonchev Street, 1113 Sofia, Bulgaria
- Novozymes A/S, Novo Allé, DK-2880, Bagsvaerd, Denmark
- Department of Human Physiology and Pharmacology “Vittorio Erspamer”, University of Rome “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy
| | - N. Ivanovska
- Department of Immunology, Institute of Microbiology, 26 G. Bonchev Street, 1113 Sofia, Bulgaria
- Novozymes A/S, Novo Allé, DK-2880, Bagsvaerd, Denmark
- Department of Human Physiology and Pharmacology “Vittorio Erspamer”, University of Rome “La Sapienza”, P. le Aldo Moro 5, 00185 Rome, Italy
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Xu YC, Leung GPH, Wong PYD, Vanhoutte PM, Man RYK. Kaempferol stimulates large conductance Ca2+ -activated K+ (BKCa) channels in human umbilical vein endothelial cells via a cAMP/PKA-dependent pathway. Br J Pharmacol 2008; 154:1247-53. [PMID: 18493242 DOI: 10.1038/bjp.2008.194] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE Kaempferol has been shown to possess a vasodilator effect but its mechanism of action remains unclear. In this study, experiments were carried out to study the effect of kaempferol on K+ channels in endothelial cells. EXPERIMENTAL APPROACH K+ channel activities in human umbilical vein endothelial cells (HUVECs) were studied by conventional whole cell and cell-attached patch-clamp electrophysiology. KEY RESULTS Kaempferol stimulated an outward-rectifying current in HUVECs in a dose-dependent manner with an EC50 value of 2.5+/-0.02 microM. This kaempferol-induced current was abolished by large conductance Ca2+ -activated K+ (BKCa) channel blockers, such as iberiotoxin (IbTX) and charybdotoxin (ChTX), whereas the small conductance Ca2+ -activated K+ (SKCa) channel blocker, apamin, and the voltage-dependent K+ (KV) channel blocker, 4-aminopyridine, had no effect. Cell-attached patches demonstrated that kaempferol increased the open probability of BkCa channels in HUVECs. Clamping intracellular Ca2+ did not prevent kaempferol-induced increases in outward current. In addition, the kaempferol-induced current was diminished by the adenylyl cyclase inhibitor SQ22536, the cAMP antagonist Rp-8-Br-cAMP and the PKA inhibitor KT5720, but was not affected by the guanylyl cyclase inhibitor ODQ, the cGMP antagonist Rp-8-Br-cGMP and the PKG inhibitor KT5823. The activation of BKCa channels by kaempferol caused membrane hyperpolarization of HUVECs. CONCLUSION AND IMPLICATIONS These results demonstrate that kaempferol activates the opening of BKCa channels in HUVECs via a cAMP/PKA-dependent pathway, resulting in membrane hyperpolarization. This mechanism may partly account for the vasodilator effects of kaempferol.
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Affiliation(s)
- Y C Xu
- Department of Pharmacology, Faculty of Medicine, The University of Hong Kong, Hong Kong, China
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Gürbüz O, Göçmen D, Dagˇdelen F, Gürsoy M, Aydin S, Şahin İ, Büyükuysal L, Usta M. Determination of flavan-3-ols and trans-resveratrol in grapes and wine using HPLC with fluorescence detection. Food Chem 2007. [DOI: 10.1016/j.foodchem.2005.10.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Stef G, Csiszar A, Lerea K, Ungvari Z, Veress G. Resveratrol inhibits aggregation of platelets from high-risk cardiac patients with aspirin resistance. J Cardiovasc Pharmacol 2006; 48:1-5. [PMID: 16954814 DOI: 10.1097/01.fjc.0000238592.67191.ab] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Up to 20% of serious vascular events in high-risk vascular patients is attributable to a failure of aspirin (ASA) to suppress platelet aggregation. Resveratrol is a cardioprotective phytoestrogen that can inhibit platelet aggregation in animal models. We hypothesized that resveratrol can also inhibit aggregation of platelets from ASA-resistant (ASA-R) patients. Thus, platelet-rich plasma was isolated from ASA-sensitive (ASA-S) and ASA-R patients (aspirin resistance was defined as higher-than-expected aggregation to collagen and epinephrine [>/=40%] after oral treatment with 100 mg/d ASA). Aggregation to adenosine diphosphate (ADP; 5 and 10 mumol/L), collagen (2 mug/mL), and epinephrine (10 mumol/L) in the absence and presence of resveratrol (10 mol/L) was measured by optical aggregometry. Maximal aggregation to 5 mumol/L ADP was only slightly affected by resveratrol. Similar results were obtained using 10 mumol/L ADP. Maximal aggregation of ASA-R platelets to collagen was significantly decreased by resveratrol, whereas resveratrol had only marginal effects in ASA-S platelets. Similar results were obtained with epinephrine as well. Collectively, resveratrol effectively inhibited collagen- and epinephrine-induced aggregation of platelets from ASA-R patients, which may contribute to its cardioprotective effects in high-risk cardiac patients.
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Affiliation(s)
- Gyorgyi Stef
- State Hospital for Cardiology, Balatonfured, Hungary
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31
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Ensafi A, Hajian R. Determination of Rutin in Pharmaceutical Compounds and Tea Using Cathodic Adsorptive Stripping Voltammetry. ELECTROANAL 2006. [DOI: 10.1002/elan.200503433] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Labinskyy N, Csiszar A, Veress G, Stef G, Pacher P, Oroszi G, Wu J, Ungvari Z. Vascular dysfunction in aging: potential effects of resveratrol, an anti-inflammatory phytoestrogen. Curr Med Chem 2006; 13:989-96. [PMID: 16611080 PMCID: PMC2228263 DOI: 10.2174/092986706776360987] [Citation(s) in RCA: 113] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Epidemiological studies demonstrated that even in the absence of other risk factors (e.g. diabetes, hypertension, hyperhomocysteinemia, hypercholesterolemia), advanced age itself significantly increases cardiovascular morbidity by enhancing vascular oxidative stress and inflammation. Because the population in the Western world is rapidly aging, there is a substantial need for pharmacological interventions that delay the functional decline of the cardiovascular system. Resveratrol is an atoxic phytoestrogen found in more than 70 plants including grapevine and berries. Recent data suggest that nutritional intake of resveratrol and other polyphenol compounds may contribute to the "French paradox", the unexpectedly low cardiovascular morbidity in the Mediterranean population. There is increasing evidence that resveratrol exerts multifaceted anti-oxidant and/or anti-inflammatory effects in various disease models. Importantly, resveratrol was reported to slow aging and increase lifespan in simple organisms and has been suggested as a potential calorie restriction mimetic. Resveratrol has also been reported to activate NAD-dependent histone deacetylases (sirtuins), which may contribute to its anti-aging effects. This review focuses on the role of oxidative stress and inflammation in cardiovascular dysfunction in aging, and on emerging anti-aging therapeutic strategies offered by resveratrol and other polyphenol compounds.
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Affiliation(s)
- Nazar Labinskyy
- Department of Physiology, New York Medical College, Valhalla, New York 10595, USA
| | - Anna Csiszar
- Department of Physiology, New York Medical College, Valhalla, New York 10595, USA
| | - Gabor Veress
- State Hospital for Cardiology, Balatonfured 8230, Hungary
| | - Gyorgyi Stef
- State Hospital for Cardiology, Balatonfured 8230, Hungary
| | - Pal Pacher
- Laboratory of Physiological Studies and Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD 20892-9413, USA
| | - Gabor Oroszi
- Laboratory of Physiological Studies and Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD 20892-9413, USA
| | - Joseph Wu
- Department of Biochemistry, New York Medical College, Valhalla, New York 10595, USA
| | - Zoltan Ungvari
- Department of Physiology, New York Medical College, Valhalla, New York 10595, USA
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Ruiz E, Padilla E, Redondo S, Gordillo-Moscoso A, Tejerina T. Kaempferol inhibits apoptosis in vascular smooth muscle induced by a component of oxidized LDL. Eur J Pharmacol 2005; 529:79-83. [PMID: 16325801 DOI: 10.1016/j.ejphar.2005.10.061] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2005] [Revised: 10/24/2005] [Accepted: 10/28/2005] [Indexed: 11/21/2022]
Abstract
Antioxidants such as flavonoids afford protection against oxysterols-induced toxicity. We have investigated the effect of kaempferol and rutin, active components of red wine, in the apoptosis induced by 7beta-hydroxycholesterol in rat vascular smooth muscle cells. 7beta-Hydroxycholesterol induced apoptosis in vascular smooth muscle which include BcL-x(L) degradation, caspase-3 activation and DNA fragmentation. The apoptosis induced by 7beta-hydroxycholesterol was prevented by pretreatment with kaempferol (10-30 microM), but not with rutin. Interestingly preincubation with the estrogen receptor alpha antagonist ICI 182,780 (1 microM) prior to kaempferol partially reverted the antiapoptotic effect of this flavonoid on caspase-3 activation and DNA fragmentation induced by 7beta-hydroxycholesterol. In conclusion, the flavonoid kaempferol, unlike rutin, diminished the apoptosis induced by a component of oxidized low-density lipproteins (oxLDL). This effect was partially mediated by the estrogen receptor alpha.
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Affiliation(s)
- Emilio Ruiz
- Department of Pharmacology, School of Medicine, Universidad Complutense, 28040 Madrid, Spain
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