301
|
Escobar-Avello D, Lozano-Castellón J, Mardones C, Pérez AJ, Saéz V, Riquelme S, von Baer D, Vallverdú-Queralt A. Phenolic Profile of Grape Canes: Novel Compounds Identified by LC-ESI-LTQ-Orbitrap-MS. Molecules 2019; 24:molecules24203763. [PMID: 31635434 PMCID: PMC6832258 DOI: 10.3390/molecules24203763] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 10/17/2019] [Accepted: 10/17/2019] [Indexed: 12/11/2022] Open
Abstract
Grape canes (Vitis vinifera L.) are a viticulture industry by-product with an important content of secondary metabolites, mainly polyphenols with a broad spectrum of demonstrated health benefits. Grape canes, therefore, have considerable economic potential as a source of high-value phytochemicals. In this work, liquid chromatography coupled with electrospray ionization hybrid linear trap quadrupole-Orbitrap mass spectrometry (LC-LTQ-Orbitrap) was used for the comprehensive identification of polyphenolic compounds in grape canes. Identification of polyphenols was performed by comparing their retention times, accurate mass measured, and mass fragmentation patterns with those of reference substances or available data in the literature. A total of 75 compounds were identified, including phenolic acids, flavanols, flavonols, flavanonols, flavanones, and stilbenoids. The most abundant polyphenols were proanthocyanidins and stilbenoids and their oligomers. Moreover, the high-resolution mass spectrometry analysis revealed the occurrence of 17 polyphenols never described before in grape canes, thereby providing a more complete polyphenolic profile of this potentially valuable by-product.
Collapse
Affiliation(s)
- Danilo Escobar-Avello
- Department of Nutrition, Food Science and Gastronomy XaRTA, Institute of Nutrition and Food Safety (INSA-UB), Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (D.E.-A.); (J.L.-C.)
- Unidad de Desarrollo Tecnológico, Universidad de Concepción, 4191996 Coronel, Chile;
| | - Julián Lozano-Castellón
- Department of Nutrition, Food Science and Gastronomy XaRTA, Institute of Nutrition and Food Safety (INSA-UB), Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (D.E.-A.); (J.L.-C.)
- Consorcio CIBER, M.P. Fisiopatología de la Obesidad y la Nutrición (CIBERObn), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
| | - Claudia Mardones
- Departamento de Análisis Instrumental, Facultad de Farmacia, Universidad de Concepción, Concepción, Chile; (C.M.); (A.J.P.); (V.S.); (D.v.B.)
| | - Andy J. Pérez
- Departamento de Análisis Instrumental, Facultad de Farmacia, Universidad de Concepción, Concepción, Chile; (C.M.); (A.J.P.); (V.S.); (D.v.B.)
| | - Vania Saéz
- Departamento de Análisis Instrumental, Facultad de Farmacia, Universidad de Concepción, Concepción, Chile; (C.M.); (A.J.P.); (V.S.); (D.v.B.)
| | - Sebastián Riquelme
- Unidad de Desarrollo Tecnológico, Universidad de Concepción, 4191996 Coronel, Chile;
- Departamento de Análisis Instrumental, Facultad de Farmacia, Universidad de Concepción, Concepción, Chile; (C.M.); (A.J.P.); (V.S.); (D.v.B.)
| | - Dietrich von Baer
- Departamento de Análisis Instrumental, Facultad de Farmacia, Universidad de Concepción, Concepción, Chile; (C.M.); (A.J.P.); (V.S.); (D.v.B.)
| | - Anna Vallverdú-Queralt
- Department of Nutrition, Food Science and Gastronomy XaRTA, Institute of Nutrition and Food Safety (INSA-UB), Faculty of Pharmacy and Food Sciences, University of Barcelona, 08028 Barcelona, Spain; (D.E.-A.); (J.L.-C.)
- Consorcio CIBER, M.P. Fisiopatología de la Obesidad y la Nutrición (CIBERObn), Instituto de Salud Carlos III (ISCIII), 28029 Madrid, Spain
- Correspondence: ; Tel.: +34-93-403-4843
| |
Collapse
|
302
|
Hydrophobically Modified Glucan as an Amphiphilic Carbohydrate Polymer for Micellar Delivery of Myricetin. MOLECULES (BASEL, SWITZERLAND) 2019; 24:molecules24203747. [PMID: 31627423 PMCID: PMC6833000 DOI: 10.3390/molecules24203747] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 10/13/2019] [Accepted: 10/15/2019] [Indexed: 02/07/2023]
Abstract
Myricetin (Myr) is a phytochemical with many functional properties. However, its hydrophobicity, low bioavailability, and stability limit its application. In this study, octadecanoate oat β-glucan (OGE) was synthesized and gained recognition as a self-assembled micelle forming a polymer with a critical micelle concentration (CMC) of 59.4 μg/mL. The Myr-loaded OGE micelle was then prepared and characterized by dynamic light scattering (DLS), transmission electron microscope (TEM), X-ray diffractometer (XRD), and Fourier-transform infrared spectroscopy (FT-IR) spectra. The water solubility of Myr was greatly enhanced by forming the Myr/OGE inclusion complex. Consequently, compared to free Myr, the retention of Myr in Myr-loaded OGE micelle was effectively increased during the intestinal digestion phase, and its antioxidant activity was also improved. Overall, our findings demonstrated the potential applications of OGE polymer for the development of prospective micelle in health food, cosmetics, and pharmaceutical fields because they can aid in the delivery of hydrophobic functional compounds like Myr.
Collapse
|
303
|
Simultaneous Optimal Production of Flavonol Aglycones and Degalloylated Catechins from Green Tea Using a Multi-Function Food-Grade Enzyme. Catalysts 2019. [DOI: 10.3390/catal9100861] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
(1) Background: Green tea (GT) contains well-known phytochemical compounds; namely, it is rich in flavan-3-ols (catechins) and flavonols comprising all glycoside forms. These compounds in GT might show better biological activities after a feasible enzymatic process, and the process on an industrial scale should consider enzyme specificity and cost-effectiveness. (2) Methods: In this study, we evaluated the most effective method for the enzymatic conversion of flavonoids from GT extract. One enzyme derived from Aspergillus niger (molecular weight 80–90 kDa) was ultimately selected, showing two distinct but simultaneous activities: intense glycoside hydrolase activity via deglycosylation and weak tannin acyl hydrolase activity via degalloylation. (3) Results: The optimum conditions for producing flavonol aglycones were pH 4.0 and 50 °C. Myricetin glycosides were cleaved 3.7–7.0 times faster than kaempferol glycosides. Flavonol aglycones were produced effectively by both enzymatic and hydrochloride treatment in a time-course reaction. Enzymatic treatment retained 80% (w/w) catechins, whereas 70% (w/w) of catechins disappeared by hydrochloride treatment. (4) Conclusions: This enzymatic process offers an effective method of conditionally producing flavonol aglycones and de-galloylated catechins from conversion of food-grade enzyme.
Collapse
|
304
|
Tenfen A, Mariano LNB, Boeing T, Cechinel-Zanchett CC, da Silva LM, de Andrade SF, de Souza P, Cechinel-Filho V. Effects of myricetin-3-O-α-rhamnoside (myricitrin) treatment on urinary parameters of Wistar rats. J Pharm Pharmacol 2019; 71:1832-1838. [DOI: 10.1111/jphp.13172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 09/04/2019] [Accepted: 09/14/2019] [Indexed: 12/17/2022]
Abstract
Abstract
Objectives
This study aimed to investigate the diuretic efficacy of myricetin-3-O-α-rhamnoside (myricitrin), a common naturally occurring plant-derived flavonoid, obtained from Marlierea eugeniopsoides (D.Legrand & Kausel) D.Legrand leaves in rats.
Methods
For that, female Wistar rats were treated by oral route with the different treatments and kept in metaboloic cages for 8-h or 24-h experiment. The volume and urinary parameters were measured at the end of the period and compared between groups.
Key findings
When orally given to rats and compared to the vehicle-treated group, myricitrin (0.3 and 1 mg/kg) was able to stimulate rat diuresis, natriuresis and kaliuresis. The combination myricitrin plus hydrochlorothiazide, but not plus furosemide or amiloride, potentiated the urinary volume when compared to the effects of drugs alone. Besides, the 8-h renal effects of myricitrin were prevented in the presence of a cyclooxygenase inhibitor and a muscarinic receptor antagonist. However, all groups treated with myricitrin showed a significant reduction in Cl− excretion. In addition, a reduction in the urinary excretion of Cl− and HCO3− was detected on 24-h analysis, a result that showed to be associated with an increase of these anions in the blood samples from the myricitrin-treated group. Despite these alterations, no changes in urinary or blood pH were detected.
Conclusions
Taking together, although the results of this study point to the diuretic potential of myricitrin, the reduction in urinary Cl− and HCO3− excretion should be considered in future approaches, as well as for therapeutic applicability.
Collapse
Affiliation(s)
- Adrielli Tenfen
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - Luísa Nathália Bolda Mariano
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - Thaise Boeing
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - Camile Cecconi Cechinel-Zanchett
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - Luisa Mota da Silva
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - Sérgio Faloni de Andrade
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - Priscila de Souza
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, SC, Brazil
| | - Valdir Cechinel-Filho
- Programa de Pós-Graduação em Ciências Farmacêuticas, Núcleo de Investigações Químico-Farmacêuticas (NIQFAR), Universidade do Vale do Itajaí (UNIVALI), Itajaí, SC, Brazil
| |
Collapse
|
305
|
Anti-tumor effects and associated molecular mechanisms of myricetin. Biomed Pharmacother 2019; 120:109506. [PMID: 31586904 DOI: 10.1016/j.biopha.2019.109506] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Revised: 09/18/2019] [Accepted: 09/26/2019] [Indexed: 12/14/2022] Open
Abstract
Myricetin (3, 5, 7, 3', 4', 5'-hexahydroxyflavone) is a natural flavonol compound found in a large variety of plants, including berries, oranges, grapes, herbs, teas, and wine. In the last decade, a convergence of evidence has demonstrated that myricetin has good biological activity as an anti-tumor, anti-inflammatory, and anti-oxidation agent. In studies involving various types of cancer cells, myricetin has been shown to suppress cancer cell invasion and metastasis, to induce cell cycle arrest and apoptosis of cancer cells, and to inhibit their proliferation. These findings have raised interest in myricetin as a potential tumor inhibitor in human patients. In this review, evidence of myricetin's anti-tumor activity and its underlying molecular mechanisms published in the last decade are summarized.
Collapse
|
306
|
Wu C, Luo Y, Liu L, Xie Y, Cao Y. Toxicity of combined exposure of ZnO nanoparticles (NPs) and myricetin to Caco-2 cells: changes of NP colloidal aspects, NP internalization and the apoptosis-endoplasmic reticulum stress pathway. Toxicol Res (Camb) 2019; 8:613-620. [PMID: 31588339 PMCID: PMC6762008 DOI: 10.1039/c9tx00127a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 06/20/2019] [Indexed: 12/21/2022] Open
Abstract
Phytochemicals as typical food components may significantly influence the toxicity of nanoparticles (NPs) in intestinal cells, indicating a need to evaluate the toxicological effects of NPs in a complex situation. Previous studies suggested that the anti-oxidative properties of phytochemicals were important to elicit cytoprotective effects against NP exposure. However, we recently found that the changes of signaling pathways may be more important for cytoprotective effects of phytochemicals. In this study, we investigated the influence of myricetin (MY) on the cytotoxicity of ZnO NPs in Caco-2 cells and the possible mechanism. MY at 50 μM showed minimal impact on the solubility and colloidal aspects of ZnO NPs, but protected Caco-2 cells from NP exposure as it increased the EC50 value. For comparison, dihydromyricetin (DMY; chemical analog of MY) increased the EC50 value to a much lesser extent. Exposure to ZnO NPs significantly induced intracellular Zn ions, whereas MY or DMY did not significantly influence the internalization of NPs. However, ZnO NPs significantly promoted the ratio of caspase-3/pro-caspase-3, which was inhibited by the presence of MY. Exposure to ZnO NPs did not significantly promote the biomarkers of endoplasmic reticulum (ER) stress, but co-exposure to ZnO NPs and MY significantly lowered the levels of a panel of ER stress biomarkers. In conclusion, these results suggested that MY could protect Caco-2 cells from ZnO NP exposure, which may not be related to the changes of colloidal stability or internalization of NPs but could be alternatively related to the reduction of ER stress leading to lower cleaved caspase-3.
Collapse
Affiliation(s)
- Chaohua Wu
- Key Laboratory of Environment-Friendly Chemistry and Applications of Ministry Education , Laboratory of Biochemistry , College of Chemistry , Xiangtan University , Xiangtan 411105 , P.R. China .
| | - Yunfeng Luo
- Key Laboratory of Environment-Friendly Chemistry and Applications of Ministry Education , Laboratory of Biochemistry , College of Chemistry , Xiangtan University , Xiangtan 411105 , P.R. China .
| | - Liangliang Liu
- Institute of Bast Fiber Crops , Chinese Academy of Agricultural Sciences , Changsha 410205 , P.R. China .
| | - Yixi Xie
- Key Laboratory of Environment-Friendly Chemistry and Applications of Ministry Education , Laboratory of Biochemistry , College of Chemistry , Xiangtan University , Xiangtan 411105 , P.R. China .
| | - Yi Cao
- Key Laboratory of Environment-Friendly Chemistry and Applications of Ministry Education , Laboratory of Biochemistry , College of Chemistry , Xiangtan University , Xiangtan 411105 , P.R. China .
| |
Collapse
|
307
|
Alves GDAD, Fernandes da Silva D, Venteu Teixeira T, de Souza RO, Rogez H, Fonseca MJV. Obtainment of an enriched fraction of Inga edulis: identification using UPLC-DAD-MS/MS and photochemopreventive screening. Prep Biochem Biotechnol 2019; 50:28-36. [PMID: 31453734 DOI: 10.1080/10826068.2019.1658118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Inga edulis is a fruit tree native from Central and South America. Different species of Inga have demonstrated high polyphenolic content and high antioxidant capacity. The oxidative stress significantly contributes to the development of several chronicle diseases, particularly age-related diseases. Therefore, photochemoprevention is an emerging interest in the use of naturally occurring antioxidants for their therapeutic use. A partial purification of the extract was carried out onto macroporous resin and the main components of I. edulis leaf extract and fraction were identified using UPLC-DAD-MS/MS as epicatechin, apigenin C-di-hexoside, myricetin-O-hexose-deoxyhexose, myricetin-O-deoxyhexose and vicenin-2, which was identified for the first time in I. edulis. Both extract and fraction presented high antioxidant capacity, the fraction exhibiting higher polyphenol and flavonoid contents and higher content of vicenin-2, suggesting that the fractioning process effectively resulted in the partial purification of the extract. The cytotoxicity and photostability were assessed in L929 fibroblast cells to evaluate whether I. edulis extract and fraction were suitable for topical application. The UVA and UVB irradiated extract and fraction did not decrease the antioxidant capacity and cell viability of L929 fibroblasts, demonstrating the photostability of the samples. The fractioning process successfully purified and enriched I. edulis extract, and both the extract and fraction are potential candidates to be safely incorporated in topical photochemopreventive formulations.
Collapse
Affiliation(s)
- Georgia de Assis Dias Alves
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Daniele Fernandes da Silva
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Rebeca Oliveira de Souza
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| | - Hervé Rogez
- Centre for Valorization of Amazonian Bioactive Compounds (CVACBA), Federal University of Pará, Belém, Pará, Brazil
| | - Maria José Vieira Fonseca
- Department of Pharmaceutical Sciences, School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, Ribeirão Preto, Brazil
| |
Collapse
|
308
|
Soleymani S, Farzaei MH, Zargaran A, Niknam S, Rahimi R. Promising plant-derived secondary metabolites for treatment of acne vulgaris: a mechanistic review. Arch Dermatol Res 2019; 312:5-23. [DOI: 10.1007/s00403-019-01968-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 08/13/2019] [Accepted: 08/16/2019] [Indexed: 02/06/2023]
|
309
|
Nian B, Chen L, Yi C, Shi X, Jiang B, Jiao W, Liu Q, Lv C, Ma Y, Zhao M. A high performance liquid chromatography method for simultaneous detection of 20 bioactive components in tea extracts. Electrophoresis 2019; 40:2837-2844. [PMID: 31353482 DOI: 10.1002/elps.201900154] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 07/17/2019] [Accepted: 07/23/2019] [Indexed: 11/11/2022]
Abstract
Tea is the second most widely consumed beverage and contains various bioactive compounds. A simple method to analyze these compounds is of great scientific and commercial interest. In this work, a 30 min HPLC method was developed using a simple gradient elution system, and the mobile phases and elution gradients were optimized. This method separated 17 polyphenols and three alkaloid compounds in tea extracts, including catechins, alkaloids, phenolic acids, flavonols, and flavone, which are responsible for the bioactivity and flavor of tea. Excellent linearity was observed for all standard calibration curves, and correlation coefficients were above 0.9994. Heatmap analysis demonstrated significant separation between green, black, and pu-erh tea samples. The method described here is accurate and sensitive enough for the determination of active components in tea and could potentially be applied to other food products for the comprehensive investigation of their quality.
Collapse
Affiliation(s)
- Bo Nian
- College of Longrun Pu-erh Tea, Yunnan Agricultural University, Kunming, Yunnan, P. R. China
| | - Lijiao Chen
- College of Longrun Pu-erh Tea, Yunnan Agricultural University, Kunming, Yunnan, P. R. China
| | - Chao Yi
- College of Longrun Pu-erh Tea, Yunnan Agricultural University, Kunming, Yunnan, P. R. China
| | - Xingyun Shi
- College of Longrun Pu-erh Tea, Yunnan Agricultural University, Kunming, Yunnan, P. R. China
| | - Bin Jiang
- College of Longrun Pu-erh Tea, Yunnan Agricultural University, Kunming, Yunnan, P. R. China
| | - Wenwen Jiao
- College of Longrun Pu-erh Tea, Yunnan Agricultural University, Kunming, Yunnan, P. R. China
| | - Qianting Liu
- College of Longrun Pu-erh Tea, Yunnan Agricultural University, Kunming, Yunnan, P. R. China
| | - Caiyou Lv
- College of Longrun Pu-erh Tea, Yunnan Agricultural University, Kunming, Yunnan, P. R. China
| | - Yan Ma
- College of Longrun Pu-erh Tea, Yunnan Agricultural University, Kunming, Yunnan, P. R. China
| | - Ming Zhao
- College of Longrun Pu-erh Tea, Yunnan Agricultural University, Kunming, Yunnan, P. R. China.,State Key Laboratory of Conservation and Utilization of Bio-resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan, P. R. China.,The Key Laboratory of Medicinal Plant Biology of Yunnan Province, Yunnan Agricultural University, Kunming, Yunnan, P. R. China.,National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwestern China, Yunnan Agricultural University, Kunming, Yunnan, P. R. China
| |
Collapse
|
310
|
Xia SF, Qiu YY, Chen LM, Jiang YY, Huang W, Xie ZX, Tang X, Sun J. Myricetin alleviated hepatic steatosis by acting on microRNA-146b/thyroid hormone receptor b pathway in high-fat diet fed C57BL/6J mice. Food Funct 2019; 10:1465-1477. [PMID: 30776032 DOI: 10.1039/c8fo01452c] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Hepatic microRNAs (miRs) regulate local thyroid hormone (TH) action and TH-related lipid metabolism. We previously found that myricetin effectively ameliorated hepatic steatosis by targeting PPAR signaling pathway, in which the differentially expressed genes were TH-responsive. The present study was designed to explore the mechanism by which myricetin regulated miR-dependent TH action and lipid metabolism on high-fat diet (HFD)-induced hepatic steatosis. C57BL/6J mice were fed a HFD with or without 100 mg kg-1 myricetin by oral gavage for 16 weeks (n = 8 for each group). The results showed that myricetin improved HFD-induced hepatic steatosis, increased serum TH levels and hepatic type 1 deiodinase (DIO1) activities, and elevated energy expenditure in relation to the HFD mice. Meanwhile, myricetin inhibited miR-205 and miR-146b up-regulation induced by HFD, and also up-regulated their targets, Dio1 and thyroid hormone receptor b (TRb) expression, at both the transcriptional and translational levels, accompanied by the regulation of TH responsive lipid metabolism genes. Overexpression or knockdown of miR-205 failed to affect Dio1 mRNA and protein levels in primary mouse hepatocytes. Myricetin directly decreased miR-146b expression in miR-146b mimic-treated hepatocytes to elevate TRb levels. However, the beneficial effects of myricetin on hepatic TH action and lipid metabolism were abolished by TRb siRNA in free fatty acid (FFA)-treated hepatocytes. Our results indicated that myricetin attenuated hepatic steatosis via the miR-146b/TRb pathway and should be considered for the management of NAFLD conditions.
Collapse
Affiliation(s)
- Shu-Fang Xia
- Wuxi School of Medicine, Jiangnan University, Wuxi, China
| | | | | | | | | | | | | | | |
Collapse
|
311
|
Rha CS, Jeong HW, Park S, Lee S, Jung YS, Kim DO. Antioxidative, Anti-Inflammatory, and Anticancer Effects of Purified Flavonol Glycosides and Aglycones in Green Tea. Antioxidants (Basel) 2019; 8:E278. [PMID: 31387266 PMCID: PMC6719943 DOI: 10.3390/antiox8080278] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Revised: 07/27/2019] [Accepted: 08/01/2019] [Indexed: 12/12/2022] Open
Abstract
(1) Background: Extensive research has focused on flavan-3-ols, but information about the bioactivities of green tea flavonols is limited. (2) Methods: In this study, we investigated the antioxidative, anti-inflammatory, and anticancer effects of flavonol glycosides and aglycones from green tea using in vitro cell models. The fractions rich in flavonol glycoside (FLG) and flavonol aglycone (FLA) were obtained from green tea extract after treatment with tannase and cellulase, respectively. (3) Results: FLG and FLA contained 16 and 13 derivatives, respectively, including apigenin, kaempferol, myricetin, and quercetin, determined by mass spectrometry. FLA exhibited higher radical-scavenging activity than that of FLG. FLG and FLA attenuated the levels of intracellular oxidative stress in neuron-like PC-12 cells. The treatment of RAW 264.7 murine macrophages with FLG and FLA significantly reduced the mRNA expression of inflammation-related genes in a dose-dependent manner. Furthermore, FLG and FLA treatments decreased the viability of the colon adenoma cell line DLD-1 and breast cancer cell line E0771. Moreover, the treatment with FLG or FLA combined with paclitaxel had synergistic anticancer effects on the DLD-1 cell line. (4) Conclusions: Flavonols from green tea exerted beneficial effects on health and may be superior to flavan-3-ols.
Collapse
Affiliation(s)
- Chan-Su Rha
- Vitalbeautie Research Division, Amorepacific Corporation R&D Center, Yongin 17074, Korea
| | - Hyun Woo Jeong
- Vitalbeautie Research Division, Amorepacific Corporation R&D Center, Yongin 17074, Korea
| | - Saitbyul Park
- Safety and Regulatory Division, Amorepacific Corporation R&D Center, Yongin 17074, Korea
| | - Siyoung Lee
- Precision Medicine Research Center, Advanced Institutes of Convergence Technology, Suwon 16229, Korea
| | - Young Sung Jung
- Department of Food Science and Biotechnology, Kyung Hee University, Yongin 17104, Korea
| | - Dae-Ok Kim
- Department of Food Science and Biotechnology, Kyung Hee University, Yongin 17104, Korea.
| |
Collapse
|
312
|
Man N, Wang Q, Li H, Adu-Frimpong M, Sun C, Zhang K, Yang Q, Wei Q, Ji H, Toreniyazov E, Yu J, Xu X. Improved oral bioavailability of myricitrin by liquid self-microemulsifying drug delivery systems. J Drug Deliv Sci Technol 2019. [DOI: 10.1016/j.jddst.2019.05.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
|
313
|
Žurga P, Vahčić N, Pasković I, Banović M, Staver MM. Croatian Wines from Native Grape Varieties Have Higher Distinct Phenolic (Nutraceutic) Profiles than Wines from Non-Native Varieties with the Same Geographic Origin. Chem Biodivers 2019; 16:e1900218. [PMID: 31282123 DOI: 10.1002/cbdv.201900218] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Accepted: 07/05/2019] [Indexed: 02/01/2023]
Abstract
Croatian wines made from native (Plavac mali and Teran) and non-native grape varieties (Cabernet Sauvignon and Merlot), all grown in Croatian coastal regions, were investigated. Analyses included measurements of antioxidant activities, total phenolic contents and concentrations of non-colored phenolic compounds, chosen based on their known nutraceutical properties. Plavac mali wines were distinguished by higher antioxidant activity, total phenolic content and catechin concentrations but lower flavonol concentrations. Teran wines had higher hydroxytyrosol, myricetin and resveratrol concentrations. Merlot and Cabernet Sauvignon wines had higher flavonol concentrations (except myricetin). Canonical analysis was successful in discriminating Plavac mali from Teran wines, and both varieties were separated from non-native varieties. The results indicate distinct genetic potentials of studied varieties and enable wine authentication based on the investigated bioactive compounds.
Collapse
Affiliation(s)
- Paula Žurga
- Teaching Institute of Public Health of Primorsko-goranska County, Krešimirova 52a, HR-51000, Rijeka, Croatia
| | - Nada Vahčić
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, HR-10000, Zagreb, Croatia
| | - Igor Pasković
- Institute of Agriculture and Tourism, Karla Huguesa 8, HR-52440, Poreč, Croatia
| | - Mara Banović
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, HR-10000, Zagreb, Croatia
| | - Mladenka Malenica Staver
- Department of Biotechnology, University of Rijeka, Radmile Matejčić 2, HR-51000, Rijeka, Croatia
| |
Collapse
|
314
|
Chinsembu KC. Chemical diversity and activity profiles of HIV-1 reverse transcriptase inhibitors from plants. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2019. [DOI: 10.1016/j.bjp.2018.10.006] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
315
|
Zhang L, Virgous C, Si H. Synergistic anti-inflammatory effects and mechanisms of combined phytochemicals. J Nutr Biochem 2019; 69:19-30. [DOI: 10.1016/j.jnutbio.2019.03.009] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 02/22/2019] [Accepted: 03/14/2019] [Indexed: 12/31/2022]
|
316
|
Beasley JT, Hart JJ, Tako E, Glahn RP, Johnson AAT. Investigation of Nicotianamine and 2' Deoxymugineic Acid as Enhancers of Iron Bioavailability in Caco-2 Cells. Nutrients 2019; 11:E1502. [PMID: 31262064 PMCID: PMC6683067 DOI: 10.3390/nu11071502] [Citation(s) in RCA: 9] [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: 06/01/2019] [Revised: 06/25/2019] [Accepted: 06/28/2019] [Indexed: 12/21/2022] Open
Abstract
Nicotianamine (NA) is a low-molecular weight metal chelator in plants with high affinity for ferrous iron (Fe2+) and other divalent metal cations. In graminaceous plant species, NA serves as the biosynthetic precursor to 2' deoxymugineic acid (DMA), a root-secreted mugineic acid family phytosiderophore that chelates ferric iron (Fe3+) in the rhizosphere for subsequent uptake by the plant. Previous studies have flagged NA and/or DMA as enhancers of Fe bioavailability in cereal grain although the extent of this promotion has not been quantified. In this study, we utilized the Caco-2 cell system to compare NA and DMA to two known enhancers of Fe bioavailability-epicatechin (Epi) and ascorbic acid (AsA)-and found that both NA and DMA are stronger enhancers of Fe bioavailability than Epi, and NA is a stronger enhancer of Fe bioavailability than AsA. Furthermore, NA reversed Fe uptake inhibition by Myricetin (Myr) more than Epi, highlighting NA as an important target for biofortification strategies aimed at improving Fe bioavailability in staple plant foods.
Collapse
Affiliation(s)
- Jesse T Beasley
- School of BioSciences, The University of Melbourne, Victoria 3010, Australia.
| | - Jonathan J Hart
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Ithaca, NY 14853, USA
| | - Elad Tako
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Ithaca, NY 14853, USA
| | - Raymond P Glahn
- Robert W. Holley Center for Agriculture and Health, USDA-ARS, Ithaca, NY 14853, USA
| | | |
Collapse
|
317
|
Maryam S, Khan MR, Shah SA, Zahra Z, Batool R, Zai JA. Evaluation of anti-inflammatory potential of the leaves of Wendlandia heynei (Schult.) Santapau & Merchant in Sprague Dawley rat. JOURNAL OF ETHNOPHARMACOLOGY 2019; 238:111849. [PMID: 30953822 DOI: 10.1016/j.jep.2019.111849] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 03/29/2019] [Accepted: 03/31/2019] [Indexed: 06/09/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The leaves of W. heynei (family: Rubiaceae) are used by the folklore in swelling, wounds and body aches. In this study anti-inflammatory potential of W. heynei leaves has been evaluated during in vitro studies and in rat. METHODS Methanol extract of the leaves of W. heynei (WHLM) and its fractions; n-hexane (WHLH), chloroform (WHLC), ethyl acetate (WHLE), n-butanol (WHLB) and residual soluble aqueous (WHLA) were screened for phytochemical analysis and several active constituents (alkaloids, flavonoids, saponins, tannins, terpenoids, β-carotene and lycopene) were also quantified. Heat induced albumin denaturation assay and in vitro cell cultures was carried out for in vitro anti-inflammatory activity, while various in vivo assays like TPA induced ear edema, croton oil induced anus edema, formalin and carrageenan-induced hind paw edema was investigated in Sprague-Dawley rats. Alterations on levels of tumor necrosis factor (TNF-α), Interleukin-1β (IL-1β), IL-6 and prostaglandins (PGE2) induced with WHLE was studied in serum after carrageenan induced paw edema in rat. Meanwhile, the dose dependent WHLE inhibition of NFκB pathway via regulation of the phosphorylation of IKKs, IκBα, and p65 subunit was studied in LPS-induced rat peritoneal macrophages. On account of marked anti-inflammatory activity of WHLE its bioactive components were analyzed by HPLC-DAD analysis. RESULTS The phytochemical analysis yielded alkaloids, saponins, tannins, coumarins, glycosides, quinones and vitamin C in WHLM and in all fractions. Fraction (WHLE) was enriched with alkaloids (20.20 ± 2.5%), flavonoids (25.26 ± 2.11%) and tannins (307.2 ± 2.03 mg of GAE/g of extract), while terpenoids (21.60 ± 1.65%) were the major constituents of WHLH. Ethyl acetate fraction convincingly protected heat induced albumin denaturation. WHLE exhibited highest edema inhibition in models of TPA-induced ear edema (74.51 ± 2.05) and croton oil-induced anal edema (75.38 ± 2.83). The pretreatment with WHLE significantly (p < 0.05) reduced the paw edema with formalin (78.99 ± 2.26%) assessed after 6 h and in carrageenan (75.71 ± 4.46%) was detected after 4 h. Level of anti-inflammatory markers; IL-1β, IL-6, TNF-α and PGE2 in carrageenan induced paw edema in serum of rat was significantly (p < 0.001) decreased with WHLE pretreatment to rat. WHLE significantly inhibited the NFκB by reducing the phosphorylation of IKKs, IκBα, and p65 subunit in LPS-induced inflammation in rat peritoneal macrophages. HPLC-DAD analysis of WHLE indicated the presence of rutin, gallic acid, catechin, caffeic acid and myricetin. CONCLUSIONS It is concluded that WHLM fractions have marked anti-inflammatory activity and this study endorsed the folklore use of W. heynei leaves for swelling related disorders.
Collapse
Affiliation(s)
- Sonia Maryam
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.
| | - Muhammad Rashid Khan
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.
| | - Sayed Afzal Shah
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.
| | - Zartash Zahra
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.
| | - Riffat Batool
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.
| | - Jawaid Ahmed Zai
- Department of Biochemistry, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad, Pakistan.
| |
Collapse
|
318
|
Guo C, Xue G, Pan B, Zhao M, Chen S, Gao J, Chen T, Qiu L. Myricetin Ameliorates Ethanol-Induced Lipid Accumulation in Liver Cells by Reducing Fatty Acid Biosynthesis. Mol Nutr Food Res 2019; 63:e1801393. [PMID: 31168926 DOI: 10.1002/mnfr.201801393] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 04/28/2019] [Indexed: 12/17/2022]
Abstract
SCOPE Alcoholic liver disease is a serious threat to human health. The development of drug candidates from complementary and alternative medicines is an attractive approach. Myricetin can be found in fruit, vegetables, and herbs. This study investigates the protective effect of myricetin on ethanol-induced injury in mouse liver cells. METHODS AND RESULTS Oil-red O staining, assays of oxidative stress and measurements of inflammatory markers in mouse AML12 liver cells collectively demonstrate that myricetin elicits a curative effect on ethanol-induced injury. Next, the role of myricetin in the metabolic regulation of ethanol pathology in liver cells is assessed by gas chromatography coupled with mass spectrometry. Myricetin inhibits ethanol-stimulated fatty acid biosynthesis. Additionally, dodecanoic acid may be proposed as a potential biomarker related to ethanol pathology or myricetin therapy. It is also observed that myricetin enhances ethanol-induced inhibition of the mitochondrial electron transport chain. Moreover, fumaric acid is found to be a candidate biomarker related to ethanol toxicity or myricetin therapy. Quantitative reverse-transcription-PCR shows that ethanol-induced fatty acid synthase and sterol regulatory element-binding protein-1c mRNA levels are alleviated by myricetin. Finally, myricetin increases ethanol-induced inhibition of phosphorylation of AMP-activated protein kinase. CONCLUSION These results elucidate the pharmacological mechanism of myricetin on ethanol-induced lipid accumulation.
Collapse
Affiliation(s)
- Chang Guo
- School of Life Sciences, Longyan University, Longyan, 364012, P. R. China.,Fujian Provincial Key Laboratory for the Prevention and Control of Animal Infectious Diseases and Biotechnology, Longyan, 364012, P. R. China.,Key Laboratory of Preventive Veterinary Medicine and Biotechnology (Longyan University), Fujian Province University, Longyan, 364012, P. R. China
| | - Guoqing Xue
- School of Life Sciences, Longyan University, Longyan, 364012, P. R. China
| | - Bei Pan
- School of Life Sciences, Longyan University, Longyan, 364012, P. R. China
| | - Mengjie Zhao
- School of Life Sciences, Longyan University, Longyan, 364012, P. R. China
| | - Si Chen
- School of Life Sciences, Longyan University, Longyan, 364012, P. R. China
| | - Jing Gao
- School of Life Sciences, Longyan University, Longyan, 364012, P. R. China
| | - Tong Chen
- School of Life Sciences, Longyan University, Longyan, 364012, P. R. China.,Fujian Provincial Key Laboratory for the Prevention and Control of Animal Infectious Diseases and Biotechnology, Longyan, 364012, P. R. China.,Key Laboratory of Preventive Veterinary Medicine and Biotechnology (Longyan University), Fujian Province University, Longyan, 364012, P. R. China
| | - Longxin Qiu
- School of Life Sciences, Longyan University, Longyan, 364012, P. R. China.,Fujian Provincial Key Laboratory for the Prevention and Control of Animal Infectious Diseases and Biotechnology, Longyan, 364012, P. R. China.,Key Laboratory of Preventive Veterinary Medicine and Biotechnology (Longyan University), Fujian Province University, Longyan, 364012, P. R. China
| |
Collapse
|
319
|
Kabra A, Martins N, Sharma R, Kabra R, Baghel US. Myrica esculenta Buch.-Ham. ex D. Don: A Natural Source for Health Promotion and Disease Prevention. PLANTS 2019; 8:plants8060149. [PMID: 31159283 PMCID: PMC6631742 DOI: 10.3390/plants8060149] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 05/22/2019] [Accepted: 05/25/2019] [Indexed: 01/13/2023]
Abstract
Myrica esculenta (Myricaceae) is a popular medicinal plant most commonly found in the sub-tropical Himalayas. It is widely used in folk medicine to treat several ailments such as asthma, cough, chronic bronchitis, ulcers, inflammation, anemia, fever, diarrhea, and ear, nose, and throat disorders. Due to its multidimensional pharmacological and therapeutic effects, it is well recognized in the ayurvedic pharmacopeia. However, the recent upsurge in M. esculenta use and demand has led to illicit harvesting by the horticultural trade and habitat loss, pushing the plant to the brink of extinction. Thus, the present review aims to provide updated information on M. esculenta botany, ethnomedicinal uses, phytochemistry, pharmacological effects, toxicity, and conservation methods, as well as also highlight prospective for future research. Particular emphasis is also given to its antioxidant potential in health promotion. In-depth literature was probed by searching several sources via online databases, texts, websites, and thesis. About 57 compounds were isolated and identified from M. esculenta, and the available reports on physicochemical parameters, nutritional and high-performance thin-layer chromatography analysis of bioactive plant parts are portrayed in a comparative manner. Friendly holistic conservation approaches offered by plant biotechnology applications, such as micropropagation, germplasm preservation, synthetic seed production, and hairy root technologies are also discussed. Nonetheless, further studies are needed to propose the mechanistic role of crude extracts and other bioactives, and even to explore the structure–function relationship of active components.
Collapse
Affiliation(s)
- Atul Kabra
- I.K. Gujral Punjab Technical University, Kapurthala, Punjab 144603, India.
- Kota College of Pharmacy, Kota Rajasthan 325003, India.
| | - Natália Martins
- Faculty of Medicine, University of Porto, 4200-319 Porto, Portugal.
- Institute for Research and Innovation in Health (i3S), University of Porto, 4200-135 Porto, Portugal.
| | - Rohit Sharma
- Central Ayurveda Research Institute for Drug Development, CCRAS, Ministry of AYUSH, Government of India, Bidhannagar, Kolkata, West Bengal 700091, India.
| | - Ruchika Kabra
- Kota College of Pharmacy, Kota Rajasthan 325003, India.
| | | |
Collapse
|
320
|
Raising the bar in anticancer therapy: recent advances in, and perspectives on, telomerase inhibitors. Drug Discov Today 2019; 24:1370-1388. [PMID: 31136800 DOI: 10.1016/j.drudis.2019.05.015] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Revised: 05/02/2019] [Accepted: 05/21/2019] [Indexed: 02/06/2023]
Abstract
Telomerase is a ribonucleic reverse transcriptase enzyme that uses an integral RNA component as a template to add tandem telomeric DNA repeats, TTAGGG, at the 3' end of the chromosomes. 85-90% of human tumors and their derived cell lines predominantly express high levels of telomerase, therefore contributing to cancer cell development. However, in normal cells, telomerase activity is almost always absent except in germ cells and stem cells. This differential expression has been exploited to develop highly specific and potent cancer therapeutics. In this review, we outline recent advances in the development of telomerase inhibitors as anticancer agents.
Collapse
|
321
|
Zhang S, Wang R, Zhao Y, Tareq FS, Sang S. Biotransformation of Myricetin: A Novel Metabolic Pathway to Produce Aminated Products in Mice. Mol Nutr Food Res 2019; 63:e1900203. [PMID: 31087612 DOI: 10.1002/mnfr.201900203] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 04/22/2019] [Indexed: 11/12/2022]
Abstract
SCOPE In this study, whether amination is a novel metabolic pathway of myricetin, one of the major dietary flavonoids found in fruits, vegetables, and tea, and whether the aminated metabolite of myricetin remains bioactive, are investigated. METHODS AND RESULTS It is found that myricetin with a vic-trihydroxyl group on the B ring can chemically react with ammonia via the formation of myricetin quinone to generate the aminated product in vitro. As expected, the amination occurs on position 4´ of the B-ring of myricetin. The structure of this new product is confirmed by 1D and 2D nuclear magnetic resonance (NMR) spectroscopy and liquid chromatography-mass spectrometry and is named 4´-NH2 -myricetin. Using the synthetic 4´-NH2 -myricetin as a standard, the presence of this compound is searched for in fecal samples collected from myricetin-treated mice using LC-MS, and 4´-NH2 -myricetin is confirmed as the metabolite of myricetin in mice for the first time. Furthermore, two metabolites of myricetin, the mono-methylated myricetin and the microbial-derived metabolite 3,4,5-trihydroxyphenylacetic acid, are confirmed to be aminated in vivo based on LC-MS data analysis. After administration of different doses of myricetin through oral gavage, the amination of myricetin shows a dose-dependent response in feces. A similar trend is observed for the amination of the mono-methylated myricetin, but not for the microbial-derived metabolite 3,4,5-trihydroxyphenylacetic acid. In plasma, the trend of a dose-dependent response for the amination of myricetin and its mono methylated metabolite is observed, and the plasma concentration of the aminated 3,4,5-trihydroxyphenylacetic acid at 200 mg kg-1 dose is significantly higher than those at the 100 and 400 mg kg-1 doses. Interestingly, it is observed that the aminated myricetin retains the anti-inflammatory activity of myricetin. CONCLUSION This result demonstrates that amination is a novel biotransformation mechanism of myricetin to produce aminated metabolites.
Collapse
Affiliation(s)
- Shuwei Zhang
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina Agricultural and Technical State University North Carolina Research Campus, 500 Laureate Way, Kannapolis, NC, 28081, USA
| | - Ronghui Wang
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina Agricultural and Technical State University North Carolina Research Campus, 500 Laureate Way, Kannapolis, NC, 28081, USA
| | - Yantao Zhao
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina Agricultural and Technical State University North Carolina Research Campus, 500 Laureate Way, Kannapolis, NC, 28081, USA
| | - Fakir Shahidullah Tareq
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina Agricultural and Technical State University North Carolina Research Campus, 500 Laureate Way, Kannapolis, NC, 28081, USA
| | - Shengmin Sang
- Laboratory for Functional Foods and Human Health, Center for Excellence in Post-Harvest Technologies, North Carolina Agricultural and Technical State University North Carolina Research Campus, 500 Laureate Way, Kannapolis, NC, 28081, USA
| |
Collapse
|
322
|
Küpeli Akkol E, Gürağaç Dereli FT, Ilhan M. Assessment of Antidepressant Effect of the Aerial Parts of Micromeria myrtifolia Boiss. & Hohen on Mice. Molecules 2019; 24:molecules24101869. [PMID: 31096603 PMCID: PMC6571837 DOI: 10.3390/molecules24101869] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Revised: 05/08/2019] [Accepted: 05/14/2019] [Indexed: 01/26/2023] Open
Abstract
The currently available antidepressant agents necessitate the development of newer alternatives because of their serious adverse effects and costs. Traditional medicinal knowledge is likely the key that opens the door to discover new medicines. In Turkish folk medicine, the infusion prepared from aerial parts of Micromeria myrtifolia Boiss. & Hohen is used as pleasure and medicinal tea for its relaxing action. The present research was conceived to confirm the antidepressant’s potential of this traditional medicinal plant. In this process, first of all, the collected and shade-dried aerial parts of M. myrtifolia were powdered and then, extracted using solvents with different polarity as follows; n-hexane, ethyl acetate (EtOAc), and methanol (MeOH). The antidepressant activity of the extracts was evaluated by using several in vivo and in vitro experimental models of depression. When the data obtained from the control and experimental groups were compared, it was determined that the MeOH extract was the most active. The active components of this extract were isolated and identified utilizing various chromatographic separation techniques. The MeOH extract was applied to reversed phase (RP-18) column chromatography to obtain five main fractions and they were tested on antidepressant activity models. The isolated compounds from the obtained fractions were elucidated as rosmarinic acid (1), myricetin (2), apigenin (3), and naringenin (4) which were assumed to be responsible for the antidepressant activity of the aerial parts. According to the results, rosmarinic acid, myricetin, apigenin, and naringenin showed statistically significant activity on forced swimming test and tetrabenazine-induced ptosis models, whereas only rosmarinic acid showed statistically significant activity on the tail suspension test. Apigenin displayed the highest inhibitory activity on MAO A and B enzymes. Studies in the future should be performed to investigate the antidepressant activity mechanism of these natural compounds. The current research could be an important step in the development of the new agents that can be used in the treatment of depression.
Collapse
Affiliation(s)
- Esra Küpeli Akkol
- Department of Pharmacognosy, Faculty of Pharmacy, Gazi University, Etiler, Ankara 6330, Turkey.
| | | | - Mert Ilhan
- Department of Pharmacognosy, Faculty of Pharmacy, Van Yüzüncü Yıl University, Tuşba/Van 65080, Turkey.
| |
Collapse
|
323
|
Bryonia�dioica aqueous extract induces apoptosis and G2/M cell cycle arrest in MDA‑MB 231 breast cancer cells. Mol Med Rep 2019; 20:73-80. [DOI: 10.3892/mmr.2019.10220] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 03/01/2019] [Indexed: 11/05/2022] Open
|
324
|
Kil HW, Rho T, Yoon KD. Phytochemical Study of Aerial Parts of Leea asiatica. Molecules 2019; 24:E1733. [PMID: 31060200 PMCID: PMC6539499 DOI: 10.3390/molecules24091733] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 05/02/2019] [Accepted: 05/02/2019] [Indexed: 01/29/2023] Open
Abstract
Leea asiatica (L.) Ridsdale (Leeaceae) is found in tropical and subtropical countries and has historically been used as a traditional medicine in local healthcare systems. Although L. asiatica extracts have been found to possess anthelmintic and antioxidant-related nephroprotective and hepatoprotective effects, little attention has been paid toward the investigation of phytochemical constituents of this plant. In the current study, phytochemical analysis of isolates from L. asiatica led to the identification of 24 compounds, including a novel phenolic glucoside, seven triterpenoids, eight flavonoids, two phenolic glycosides, four diglycosidic compounds, and two miscellaneous compounds. The phytochemical structures of the isolates from L. asiatica were elucidated using spectroscopic analyses including 1D- and 2D-NMR and ESI-Q-TOF-MS. The presence of triterpenoids and flavonoids supports the evidence for anthelmintic and antioxidative effects of L. asiatica.
Collapse
Affiliation(s)
- Hyun Woo Kil
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon 14662, Korea.
| | - Taewoong Rho
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon 14662, Korea.
| | - Kee Dong Yoon
- College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences, The Catholic University of Korea, Bucheon 14662, Korea.
| |
Collapse
|
325
|
Zhang S, Hu X, Guo S, Shi L, He Q, Zhang P, Yu S, Zhao R. Myricetin ameliorated ischemia/reperfusion-induced brain endothelial permeability by improvement of eNOS uncoupling and activation eNOS/NO. J Pharmacol Sci 2019; 140:62-72. [PMID: 31130510 DOI: 10.1016/j.jphs.2019.04.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 04/08/2019] [Accepted: 04/17/2019] [Indexed: 11/30/2022] Open
Abstract
Disruption of the blood-brain barrier (BBB) has been considered as a major pathological change in stroke. eNOS/NO play a key role in maintain BBB function. Myricetin is one of the common flavones widely exists in food and fruit, show certain protective effect on the brain function. This experiment establishes oxygeneglucose deprivation and reoxygenation (OGD/R) brain cell model. The regulated effects of Myricetin on BBB function, eNOS/NO and eNOS uncoupling were evaluated. To investigate the molecular mechanism, Akt and Nrf2 inhibitor were also used. The result showed that Myricetin could significantly decreased the enhancement of endothelial permeability and inflammation in OGD/R model, in addition regulated eNOS/NO pathway. The regulate effect in endothelial permeability and eNOS activity by Myricetin were both decreased when combined with Akt inhibitor or Nrf2 inhibitor, and was abrogated when combined with Akt and Nrf2 inhibitor simultaneously. The regulated effect on eNOS uncoupling by Myricetin were abrogated when combined with Nrf2 inhibitor, but not with Akt inhibitor. In conclusion, Myricetin showed significant protect effect on ischemia/reperfusion-induced brain endothelial permeability, and related to simultaneously regulated Akt pathway and improvement of eNOS uncoupling through Nrf2 pathway.
Collapse
Affiliation(s)
- Song Zhang
- Department of Pharmacy, Second Affiliated Hospital of Air Force Medical University, Xi'an, 710038, China
| | - Xuehui Hu
- Department of Nursing, First Affiliated Hospital of Air Force Medical University, Xi'an, 710032, China
| | - Shun Guo
- Department of Pharmacy, Second Affiliated Hospital of Air Force Medical University, Xi'an, 710038, China
| | - Lei Shi
- Department of Pharmacy, Second Affiliated Hospital of Air Force Medical University, Xi'an, 710038, China
| | - Qing He
- Department of Cardiovascular Surgery, First Affiliated Hospital of Air Force Medical University, Xi'an, 710032, China
| | - Ping Zhang
- Department of Cardiovascular Surgery, First Affiliated Hospital of Air Force Medical University, Xi'an, 710032, China
| | - ShiQiang Yu
- Department of Cardiovascular Surgery, First Affiliated Hospital of Air Force Medical University, Xi'an, 710032, China
| | - Rong Zhao
- Department of Cardiovascular Surgery, First Affiliated Hospital of Air Force Medical University, Xi'an, 710032, China.
| |
Collapse
|
326
|
Champ CE, Kundu-Champ A. Maximizing Polyphenol Content to Uncork the Relationship Between Wine and Cancer. Front Nutr 2019; 6:44. [PMID: 31114789 PMCID: PMC6502998 DOI: 10.3389/fnut.2019.00044] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Accepted: 03/27/2019] [Indexed: 12/12/2022] Open
Abstract
Studies have revealed conflicting results regarding the risk of cancer from alcohol consumption. Furthermore, some studies have suggested that wine may have benefits that separate it from other alcoholic beverages. As wine contains a significant amount of chemicals, specifically polyphenols like anthocyanins and proanthocyanidins (PA), that can affect cellular function and promote health, this hypothesis is reasonably supported by recent research. Polyphenols promote several anticancer cellular pathways, including xenobiotic metabolism, support of innate antioxidant production, and stimulation of phase I and II detoxification of carcinogens. However, the multitude of growing and production conditions of grapes, including temperature, water availability, soil type, maceration, and aging can result in a remarkably varying final product based on the available literature. Thus, we hypothesize that wines produced from grapes cultivated between steady daily temperatures at 15–25°C with moderate sun exposure from flowering to harvest, lower vine-water status, resulting either from lower precipitation, and irrigation practices or more permeable soil types, limitation of fertilizers, extended maceration, and aging in oak will impact the concentration of anthocyanins and PA in the finished wine and may have a differential impact on cancer. This higher concentration of polyphenols would, in theory, create a healthier wine, thus explaining the conflicting reports on the benefits or harms of wine.
Collapse
Affiliation(s)
- Colin E. Champ
- Cancer Prevention Project, Pittsburgh, PA, United States
- Department of Radiation Oncology, University of Pittsburgh Medical Center, Pittsburgh, PA, United States
- *Correspondence: Colin E. Champ
| | | |
Collapse
|
327
|
Musumeci L, Maugeri A, Cirmi S, Lombardo GE, Russo C, Gangemi S, Calapai G, Navarra M. Citrus fruits and their flavonoids in inflammatory bowel disease: an overview. Nat Prod Res 2019; 34:122-136. [PMID: 30990326 DOI: 10.1080/14786419.2019.1601196] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Inflammatory bowel disease (IBD), with its major manifestations being Crohn's disease and ulcerative colitis, belongs to the gastrointestinal inflammatory disorders, whose main therapeutic approach is represented by synthetic anti-inflammatory drugs. However, they are often accompanied by many side effects that shifted the interest of the scientific community towards natural products. In this context, several studies asserted the anti-IBD effects of Citrus fruits and their flavonoids, thus the aim of the present review is to provide robust evidence favouring their role in the prevention and treatment of IBD. Key mechanisms relate to their anti-inflammatory and antioxidant properties, as well as their ability to modulate gut microbiota. All the findings collected in this review, lay the foundations for further studies in human with the aim of evaluating the concrete applicability as a novel preventive and therapeutic approach of Citrus fruits and their flavonoids.[Figure: see text].
Collapse
Affiliation(s)
- Laura Musumeci
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy.,Fondazione Prof. Antonio Imbesi, Messina, Italy
| | - Alessandro Maugeri
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Santa Cirmi
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| | - Giovanni Enrico Lombardo
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy.,Fondazione Prof. Antonio Imbesi, Messina, Italy
| | - Caterina Russo
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy.,Fondazione Prof. Antonio Imbesi, Messina, Italy
| | - Sebastiano Gangemi
- Department of Clinical and Experimental Medicine, University of Messina, Messina, Italy
| | - Gioacchino Calapai
- Department of Biomedical and Dental Sciences and Morphological and Functional Imaging, University of Messina, Messina, Italy
| | - Michele Navarra
- Department of Chemical, Biological, Pharmaceutical and Environmental Sciences, University of Messina, Messina, Italy
| |
Collapse
|
328
|
Ge ZD, Lian Q, Mao X, Xia Z. Current Status and Challenges of NRF2 as a Potential Therapeutic Target for Diabetic Cardiomyopathy. Int Heart J 2019; 60:512-520. [PMID: 30971629 DOI: 10.1536/ihj.18-476] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Diabetic cardiomyopathy is one of the main causes of heart failure and death in patients with diabetes mellitus. Reactive oxygen species produced excessively in diabetes mellitus cause necrosis, apoptosis, ferroptosis, inflammation, and fibrosis of the myocardium as well as impair the cardiac structure and function. It is increasingly clear that oxidative stress is a principal cause of diabetic cardiomyopathy. The transcription factor nuclear factor-erythroid 2 p45-related factor 2 (NRF2) activates the transcription of more than 200 genes in the human genome. Most of the proteins translated from these genes possess anti-oxidant, anti-inflammatory, anti-apoptotic, anti-ferroptotic, and anti-fibrotic actions. There is a growing body of evidence indicating that NRF2 and its target genes are crucial in preventing high glucose-induced oxidative damage in diabetic cardiomyopathy. Recently, many natural and synthetic activators of NRF2 are shown to possess promising therapeutic effects on diabetic cardiomyopathy in animal models of diabetic cardiomyopathy. Targeting NRF2 signaling by pharmacological entities is a potential approach to ameliorating diabetic cardiomyopathy. However, the persistent high expression of NRF2 in cancer tissues also protects the growth of cancer cells. This "dark side" of NRF2 increases the challenges of using NRF2 activators to treat diabetic cardiomyopathy. In addition, some NRF2 activators were found to have off-target effects. In this review, we summarize the current status and challenges of NRF2 as a potential therapeutic target for diabetic cardiomyopathy.
Collapse
Affiliation(s)
- Zhi-Dong Ge
- Department of Anesthesiology, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou.,Department of Anesthesiology, Medical College of Wisconsin, Milwaukee
| | - Qingquan Lian
- Department of Anesthesiology, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou
| | - Xiaowen Mao
- Department of Anesthesiology, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou
| | - Zhengyuan Xia
- Department of Anesthesiology, The Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou.,Department of Anesthesiology, The University of Hong Kong
| |
Collapse
|
329
|
Ramos M, Burgos N, Barnard A, Evans G, Preece J, Graz M, Ruthes AC, Jiménez-Quero A, Martínez-Abad A, Vilaplana F, Ngoc LP, Brouwer A, van der Burg B, Del Carmen Garrigós M, Jiménez A. Agaricus bisporus and its by-products as a source of valuable extracts and bioactive compounds. Food Chem 2019; 292:176-187. [PMID: 31054663 DOI: 10.1016/j.foodchem.2019.04.035] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2018] [Revised: 04/07/2019] [Accepted: 04/08/2019] [Indexed: 01/28/2023]
Abstract
Edible mushrooms constitute an appreciated nutritional source for humans due to their low caloric intake and their high content in carbohydrates, proteins, dietary fibre, phenolic compounds, polyunsaturated fatty acids, vitamins and minerals. It has been also demonstrated that mushrooms have health-promoting benefits. Cultivation of mushrooms, especially of the most common species Agaricus bisporus, represents an increasingly important food industry in Europe, but with a direct consequence in the increasing amount of by-products from their industrial production. This review focuses on collecting and critically investigating the current data on the bioactive properties of Agaricus bisporus as well as the recent research for the extraction of valuable functional molecules from this species and its by-products obtained after industrial processing. The state of the art regarding the antimicrobial, antioxidant, anti-allergenic and dietary compounds will be discussed for novel applications such as nutraceuticals, additives for food or cleaning products.
Collapse
Affiliation(s)
- Marina Ramos
- University of Alicante, Department of Analytical Chemistry, Nutrition & Food Sciences, ES-03690, San Vicente del Raspeig, Alicante, Spain
| | - Nuria Burgos
- University of Alicante, Department of Analytical Chemistry, Nutrition & Food Sciences, ES-03690, San Vicente del Raspeig, Alicante, Spain
| | - Almero Barnard
- Neem Biotech Ltd. Units G&H, Abertillery NP13 1SX, United Kingdom
| | - Gareth Evans
- Neem Biotech Ltd. Units G&H, Abertillery NP13 1SX, United Kingdom
| | - James Preece
- Neem Biotech Ltd. Units G&H, Abertillery NP13 1SX, United Kingdom
| | - Michael Graz
- Neem Biotech Ltd. Units G&H, Abertillery NP13 1SX, United Kingdom
| | - Andrea Caroline Ruthes
- Division of Glycoscience, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Centre, SE-106 91 Stockholm, Sweden
| | - Amparo Jiménez-Quero
- Division of Glycoscience, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Centre, SE-106 91 Stockholm, Sweden
| | - Antonio Martínez-Abad
- University of Alicante, Department of Analytical Chemistry, Nutrition & Food Sciences, ES-03690, San Vicente del Raspeig, Alicante, Spain; Neem Biotech Ltd. Units G&H, Abertillery NP13 1SX, United Kingdom
| | - Francisco Vilaplana
- Division of Glycoscience, School of Biotechnology, KTH Royal Institute of Technology, AlbaNova University Centre, SE-106 91 Stockholm, Sweden
| | - Long Pham Ngoc
- BioDetection Systems b.v, Science Park, 406, 1098 XH Amsterdam, The Netherlands
| | - Abraham Brouwer
- BioDetection Systems b.v, Science Park, 406, 1098 XH Amsterdam, The Netherlands
| | - Bart van der Burg
- BioDetection Systems b.v, Science Park, 406, 1098 XH Amsterdam, The Netherlands
| | - María Del Carmen Garrigós
- University of Alicante, Department of Analytical Chemistry, Nutrition & Food Sciences, ES-03690, San Vicente del Raspeig, Alicante, Spain
| | - Alfonso Jiménez
- University of Alicante, Department of Analytical Chemistry, Nutrition & Food Sciences, ES-03690, San Vicente del Raspeig, Alicante, Spain.
| |
Collapse
|
330
|
Ortega JT, Parmar T, Jastrzebska B. Flavonoids enhance rod opsin stability, folding, and self-association by directly binding to ligand-free opsin and modulating its conformation. J Biol Chem 2019; 294:8101-8122. [PMID: 30944172 DOI: 10.1074/jbc.ra119.007808] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2019] [Revised: 03/27/2019] [Indexed: 12/29/2022] Open
Abstract
Rhodopsin (Rho) is a visual G protein-coupled receptor expressed in the rod photoreceptors of the eye, where it mediates transmission of a light signal into a cell and converts this signal into a nerve impulse. More than 100 mutations in Rho are linked to various ocular impairments, including retinitis pigmentosa (RP). Accordingly, much effort has been directed toward developing ligands that target Rho and improve its folding and stability. Natural compounds may provide another viable approach to such drug discovery efforts. The dietary polyphenol compounds, ubiquitously present in fruits and vegetables, have beneficial effects in several eye diseases. However, the underlying mechanism of their activity is not fully understood. In this study, we used a combination of computational methods, biochemical and biophysical approaches, including bioluminescence resonance energy transfer, and mammalian cell expression systems to clarify the effects of four common bioactive flavonoids (quercetin, myricetin, and their mono-glycosylated forms quercetin-3-rhamnoside and myricetrin) on rod opsin stability, function, and membrane organization. We observed that by directly interacting with ligand-free opsin, flavonoids modulate its conformation, thereby causing faster entry of the retinal chromophore into its binding pocket. Moreover, flavonoids significantly increased opsin stability, most likely by introducing structural rigidity and promoting receptor self-association within the biological membranes. Of note, the binding of flavonoids to an RP-linked P23H opsin variant partially restored its normal cellular trafficking. Together, our results suggest that flavonoids could be utilized as lead compounds in the development of effective nonretinoid therapeutics for managing RP-related retinopathies.
Collapse
Affiliation(s)
- Joseph T Ortega
- Department of Pharmacology, Cleveland Center for Membrane and Structural Biology, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
| | - Tanu Parmar
- Department of Pharmacology, Cleveland Center for Membrane and Structural Biology, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106
| | - Beata Jastrzebska
- Department of Pharmacology, Cleveland Center for Membrane and Structural Biology, School of Medicine, Case Western Reserve University, Cleveland, Ohio 44106.
| |
Collapse
|
331
|
Karunakaran U, Elumalai S, Moon JS, Jeon JH, Kim ND, Park KG, Won KC, Leem J, Lee IK. Myricetin Protects Against High Glucose-Induced β-Cell Apoptosis by Attenuating Endoplasmic Reticulum Stress via Inactivation of Cyclin-Dependent Kinase 5. Diabetes Metab J 2019; 43:192-205. [PMID: 30688049 PMCID: PMC6470101 DOI: 10.4093/dmj.2018.0052] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 07/16/2018] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Chronic hyperglycemia has deleterious effects on pancreatic β-cell function and turnover. Recent studies support the view that cyclin-dependent kinase 5 (CDK5) plays a role in β-cell failure under hyperglycemic conditions. However, little is known about how CDK5 impair β-cell function. Myricetin, a natural flavonoid, has therapeutic potential for the treatment of type 2 diabetes mellitus. In this study, we examined the effect of myricetin on high glucose (HG)-induced β-cell apoptosis and explored the relationship between myricetin and CDK5. METHODS To address this question, we subjected INS-1 cells and isolated rat islets to HG conditions (30 mM) in the presence or absence of myricetin. Docking studies were conducted to validate the interaction between myricetin and CDK5. Gene expression and protein levels of endoplasmic reticulum (ER) stress markers were measured by real-time reverse transcription polymerase chain reaction and Western blot analysis. RESULTS Activation of CDK5 in response to HG coupled with the induction of ER stress via the down regulation of sarcoendoplasmic reticulum calcium ATPase 2b (SERCA2b) gene expression and reduced the nuclear accumulation of pancreatic duodenal homeobox 1 (PDX1) leads to β-cell apoptosis. Docking study predicts that myricetin inhibit CDK5 activation by direct binding in the ATP-binding pocket. Myricetin counteracted the decrease in the levels of PDX1 and SERCA2b by HG. Moreover, myricetin attenuated HG-induced apoptosis in INS-1 cells and rat islets and reduce the mitochondrial dysfunction by decreasing reactive oxygen species production and mitochondrial membrane potential (ΔΨm) loss. CONCLUSION Myricetin protects the β-cells against HG-induced apoptosis by inhibiting ER stress, possibly through inactivation of CDK5 and consequent upregulation of PDX1 and SERCA2b.
Collapse
Affiliation(s)
- Udayakumar Karunakaran
- Department of Biomedical Science, Graduate School of Medicine, Kyungpook National University, Daegu, Korea
- Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea
| | - Suma Elumalai
- Institute of Medical Science, Yeungnam University College of Medicine, Daegu, Korea
| | - Jun Sung Moon
- Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea
| | - Jae Han Jeon
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, Korea
| | - Nam Doo Kim
- New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu, Korea
| | - Keun Gyu Park
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, Korea
| | - Kyu Chang Won
- Department of Internal Medicine, Yeungnam University College of Medicine, Daegu, Korea
| | - Jaechan Leem
- Department of Immunology, School of Medicine, Catholic University of Daegu, Daegu, Korea.
| | - In Kyu Lee
- Department of Internal Medicine, School of Medicine, Kyungpook National University, Kyungpook National University Hospital, Daegu, Korea.
| |
Collapse
|
332
|
Stoll S, Bitencourt S, Laufer S, Inês Goettert M. Myricetin inhibits panel of kinases implicated in tumorigenesis. Basic Clin Pharmacol Toxicol 2019; 125:3-7. [PMID: 30624861 DOI: 10.1111/bcpt.13201] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 01/03/2019] [Indexed: 12/16/2022]
Abstract
Myricetin is a flavonoid with several biological properties, including antioxidant and anti-inflammatory features. Its protective effect in chronic diseases may occur through the inhibition of protein kinases that trigger inflammation and carcinogenesis pathways. Considering the influence of kinases on such pathological disorders, it is crucial to study compounds that inhibit these proteins. This study aims to evaluate the inhibitory potential of 14 flavonoids on TNF-α release in human whole blood as well as the inhibitory potential of myricetin towards kinases involved in tumorigenesis. Our results showed that, out of all flavonoids, myricetin had the highest inhibitory effect on TNF-α level. In addition, myricetin showed potential as a multi-anti-kinase compound, reducing the activity of 7 kinases by >70% and of 9 kinases by >90%. Together these data demonstrate the great inhibitory activity of myricetin on tumorigenic kinases and potential for the development of new therapeutics.
Collapse
Affiliation(s)
- Stefani Stoll
- Cell Culture Laboratory, Postgraduate Program in Biotechnology, University of Taquari Valley (Univates), Lajeado, Brazil
| | - Shanna Bitencourt
- Cell Culture Laboratory, Postgraduate Program in Biotechnology, University of Taquari Valley (Univates), Lajeado, Brazil
| | - Stefan Laufer
- Department of Pharmaceutical and Medicinal Chemistry, Institute of Pharmacy, University of Tübingen, Tübingen, Germany
| | - Márcia Inês Goettert
- Cell Culture Laboratory, Postgraduate Program in Biotechnology, University of Taquari Valley (Univates), Lajeado, Brazil
| |
Collapse
|
333
|
Inhibitory Mechanisms of Myricetin on Human and Rat Liver Cytochrome P450 Enzymes. Eur J Drug Metab Pharmacokinet 2019; 44:611-618. [DOI: 10.1007/s13318-019-00546-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
|
334
|
Chen KC, Yang CH, Li TT, Zouboulis CC, Huang YC. Suppression of Propionibacterium acnes-stimulated proinflammatory cytokines by Chinese bayberry extracts and its active constituent myricetin in human sebocytes in vitro. Phytother Res 2019; 33:1104-1113. [PMID: 30734961 DOI: 10.1002/ptr.6304] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 12/18/2018] [Accepted: 01/11/2019] [Indexed: 02/06/2023]
Abstract
Myrica rubra Sieb. et Zucc. (Myricaceae), known as Chinese bayberry, is traditionally used as folk medicine in Asian countries. The interaction of Propionibacterium acnes signalling with sebocytes is considered important in the pathogenesis of acne. In the present study, extracts and active compounds of Chinese bayberry were used to determine chemical antioxidant activity and anti-inflammatory effects in P. acnes-stimulated human SZ95 sebocytes. A high-performance liquid chromatography with electrochemical detection system was used to analyse the phenolic composition of bayberry extracts. Accordingly, the flavonols, myricitrin and myricetin, were found to be abundant in the unhydrolysed and hydrolysed extracts of Chinese bayberry fruits, respectively. The anthocyanin cyanidin-3-glucoside was also predominantly found in the unhydrolysed extracts. Quantification of human inflammatory cytokines indicated that cell-free extracts of P. acnes stimulated IL-8 and IL-6 production, which was inhibited by myricetin, rather than its glycoside or anthocyanin. Myricetin also exhibited inhibitory effects in P. acnes-stimulated gene expression of Toll-like receptor (TLR) 2 and protein phosphorylation of p70 S6 kinase. In conclusion, myricetin shows a suppressive effect on P. acnes-induced cytokine production through regulation of the TLR and mammalian target of rapamycin pathways. Myricetin goes beyond previous research findings to potentially modulate inflammatory signalling in human sebocytes. These results will be valuable in developing anti-inflammatory agents against skin acne.
Collapse
Affiliation(s)
- Kuan-Chun Chen
- Department of Cosmetic Science, Providence University, Taichung City, Taiwan
| | - Chao-Hsun Yang
- Department of Cosmetic Science, Providence University, Taichung City, Taiwan
| | - Ting-Ting Li
- Department of Cosmetic Science, Providence University, Taichung City, Taiwan
| | - Christos C Zouboulis
- Departments of Dermatology, Venereology, Allergology and Immunology, Dessau Medical Center, Brandenburg Medical School Theodor Fontane, Dessau, Germany
| | - Yu-Chun Huang
- Department of Cosmetic Science, Providence University, Taichung City, Taiwan
| |
Collapse
|
335
|
Arumugam B, Palanisamy UD, Chua KH, Kuppusamy UR. Protective effect of myricetin derivatives from Syzygium malaccense against hydrogen peroxide-induced stress in ARPE-19 cells. Mol Vis 2019; 25:47-59. [PMID: 30820141 PMCID: PMC6379087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 02/05/2019] [Indexed: 12/03/2022] Open
Abstract
PURPOSE Oxidative stress is implicated in the etiology of diabetes and its debilitating complications, such as diabetic retinopathy (DR). Various flavonoids have been reported to be useful in reducing DR progression. Myricetin derivatives (F2) isolated from leaf extract of Syzygium malaccense have the potential to serve as functional food as reported previously. The present study was performed with the aim of determining the antioxidant potential and protective effect of myricetin derivatives (F2) isolated from leaf extract of S. malaccense against glucose oxidase (GO)-induced hydrogen peroxide (H2O2) production that causes oxidative stress in ARPE-19 (RPE) cells. METHODS Antioxidant properties were assessed through various radical (DPPH, ABTS, and nitric oxide) scavenging assays and determination of total phenolic content and ferric reducing antioxidant power level. ARPE-19 cells were preincubated with samples before the addition of GO (to generate H2O2). Cell viability, change in intracellular reactive oxygen species (ROS), H2O2 levels in cell culture supernatant, and gene expression were assessed. RESULTS F2 showed higher antioxidant levels than the extract when assessed for radical scavenging activities and ferric reducing antioxidant power. F2 protected the ARPE-19 cells against GO-H2O2-induced oxidative stress by reducing the production of H2O2 and intracellular reactive oxygen species. This was achieved by the activation of nuclear factor erythroid 2-related factor 2 (Nrf2/NFE2L2) and superoxide dismutase (SOD2), as well as downregulation of nitric oxide producer (NOS2) at the transcriptional level. CONCLUSIONS The results showed that myricetin derivatives from S. malaccense have the capacity to exert considerable exogenous antioxidant activities and stimulate endogenous antioxidant activities. Therefore, these derivatives have excellent potential to be developed as therapeutic agents for managing DR.
Collapse
Affiliation(s)
- Bavani Arumugam
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Uma Devi Palanisamy
- Jeffrey Cheah School of Medicine and Health Sciences, Monash University Malaysia, Jalan Lagoon Selatan, Bandar Sunway, Selangor, Malaysia
| | - Kek Heng Chua
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Umah Rani Kuppusamy
- Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| |
Collapse
|
336
|
The effects of pH, surfactant, ion concentration, coformer, and molecular arrangement on the solubility behavior of myricetin cocrystals. Acta Pharm Sin B 2019; 9:59-73. [PMID: 30766778 PMCID: PMC6361854 DOI: 10.1016/j.apsb.2018.09.008] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 08/20/2018] [Accepted: 08/22/2018] [Indexed: 12/29/2022] Open
Abstract
Pharmaceutical cocrystals are a promising technology that can be used to improve the solubility of poor aqueous compounds. The objective of this study was to systematically investigate the solubility of myricetin (MYR) cocrystals, including their kinetic solubility, thermodynamic solubility, and intrinsic dissolution rate (IDR). The effects of pH, surfactant, ion concentration, and coformers on the cocrystal solubility were evaluated. Furthermore, single crystal structures of MYR, myricetin–isonicotinamide (MYR–INM) and myricetin–caffeine (MYR–CAF) cocrystals were analyzed to discuss the possible reasons for the enhancement of cocrystal solubility from the perspective of the spatial structure. The results indicated that the kinetic solubility of MYR cocrystals was modulated by pH and cocrystal coformer (CCF) ionization in buffer solution, while it primarily depended on the CCF solubility in pure water. In addition, the solubility of MYR cocrystals was increased in a concentration dependent fashion by the surfactant or ion concentration. The thermodynamic solubility of MYR–INM (1:3) cocrystals decreased with the increases of the pH value of the dissolution media. The IDR of MYR cocrystals was faster than that of MYR in the same medium and extremely fast in pH 4.5 buffer. The improved solubility of MYR cocrystals was probably related to the alternate arrangements of MYR and INM/CAF molecules and increased intermolecular distance. The present study provides some references to investigate the solubility behavior of pharmaceutical cocrystals.
Collapse
Key Words
- API, active pharmaceutical ingredient
- CAF, caffeine
- CCF, cocrystal coformer
- CCF, coformer
- CSC, critical stabilization concentration
- Cocrystal solubility
- Coformer
- Crystal structure
- Ctr, transition concentration
- FDA, Food and Drug Administration
- IDR, intrinsic dissolution rate
- INM, isonicotinamide
- Ksp, solubility product
- MYR, myricetin
- MYR–CAF, myricetin–caffeine
- MYR–INM, myricetin–isonicotinamide
- Myricetin
- NIC, nicotinamide
- PRO, proline
- PXRD, powder X-ray diffraction
- pH
Collapse
|
337
|
Chen H, Lin H, Xie S, Huang B, Qian Y, Chen K, Niu Y, Shen HM, Cai J, Li P, Leng J, Yang H, Xia D, Wu Y. Myricetin inhibits NLRP3 inflammasome activation via reduction of ROS-dependent ubiquitination of ASC and promotion of ROS-independent NLRP3 ubiquitination. Toxicol Appl Pharmacol 2018; 365:19-29. [PMID: 30594691 DOI: 10.1016/j.taap.2018.12.019] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 12/25/2018] [Accepted: 12/26/2018] [Indexed: 12/12/2022]
Abstract
Myricetin is a plant-derived flavonoid that exhibits diverse pharmacological properties. The NLRP3 (NLR family, pyrin domain-containing 3 protein) inflammasome is a cytosolic multiprotein complex that plays a critical role in the innate immune response and pathogenesis of multiple inflammatory disorders. The present study found that myricetin inhibited NLRP3 inflammasome assembly via promotion of reactive oxygen species (ROS)-independent ubiquitination of NLRP3 and reduction of ROS-dependent ubiquitination of ASC (apoptosis-associated speck-like protein containing a CARD), which disrupted the interaction between ASC and NLRP3 and inhibited ASC oligomerization. This effect was further confirmed in vivo using mouse models of lipopolysaccharide (LPS)-induced sepsis and alum-induced peritonitis. These results suggest the therapeutic value of myricetin by targeting NLRP3-driven inflammatory diseases.
Collapse
Affiliation(s)
- Hanwen Chen
- Department of Toxicology, School of Public Health, Zhejiang University, Zhejiang, Hangzhou 310058, China; Department of Gastroenterology, Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, Hangzhou 310009, China
| | - Hui Lin
- Department of Toxicology, School of Public Health, Zhejiang University, Zhejiang, Hangzhou 310058, China; Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, Hangzhou 310006, China
| | - Shujun Xie
- Department of Toxicology, School of Public Health, Zhejiang University, Zhejiang, Hangzhou 310058, China
| | - Bo Huang
- Department of Toxicology, School of Public Health, Zhejiang University, Zhejiang, Hangzhou 310058, China
| | - Yufeng Qian
- Department of Cardiology, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Zhejiang, Hangzhou 310006, China
| | - Kelie Chen
- Department of Toxicology, School of Public Health, Zhejiang University, Zhejiang, Hangzhou 310058, China; Department of Gynecologic Oncology, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, Hangzhou 310006, China
| | - Yuequn Niu
- Department of Toxicology, School of Public Health, Zhejiang University, Zhejiang, Hangzhou 310058, China
| | - Han-Ming Shen
- Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, 119077, Singapore
| | - Jianting Cai
- Department of Gastroenterology, Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, Hangzhou 310009, China
| | - Peiwei Li
- Department of Gastroenterology, Second Affiliated Hospital, Zhejiang University School of Medicine, Zhejiang, Hangzhou 310009, China
| | - Jianhang Leng
- Central Laboratory, Affiliated Hangzhou First People's Hospital, Zhejiang University School of Medicine, Zhejiang, Hangzhou 310006, China
| | - Hao Yang
- Department of Toxicology, School of Public Health, Zhejiang University, Zhejiang, Hangzhou 310058, China
| | - Dajing Xia
- Department of Toxicology, School of Public Health, Women's Hospital, School of Medicine, Zhejiang University, Zhejiang, Hangzhou 310058, China.
| | - Yihua Wu
- Department of Toxicology, School of Public Health, Zhejiang University, Zhejiang, Hangzhou 310058, China.
| |
Collapse
|
338
|
Myricetin Exerts Anti-Obesity Effects through Upregulation of SIRT3 in Adipose Tissue. Nutrients 2018; 10:nu10121962. [PMID: 30545041 PMCID: PMC6316341 DOI: 10.3390/nu10121962] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2018] [Revised: 11/29/2018] [Accepted: 12/10/2018] [Indexed: 01/02/2023] Open
Abstract
Myricetin is a biologically active natural polyphenol with beneficial effects on metabolic health. This study aimed to examine the effects of myricetin on the expression levels of genes involved in lipolysis and mitochondrial respiration in adipocytes and the anti-obesity potential of myricetin. The results indicated that myricetin reduced triglyceride (TG) content and increased mitochondrial content and oxygen consumption rate (OCR) in adipocytes in vitro. To determine anti-obesity effect of myricetin, C57BL6/J mice were fed a high-fat diet (HFD) for eight weeks and then treated with myricetin (10 mg/kg) for 2 weeks. The in vivo treatment of myricetin reduced body weight by 11%. Furthermore, it improved the glucose tolerance, and increased fatty acid consumption of HFD-fed mice. Myricetin treatment increased Sirt3 expression and reduced the acetylation of mitochondrial proteins in adipose tissue. Finally, the knockdown of Sirt3 in adipocytes reduced the myricetin-induced increase in mitochondrial oxygen consumption rate by about 27% compared to controls. Our results indicated that myricetin exerted anti-obesity effects through the upregulation of Sirt3 expression and mitochondrial metabolism in adipose tissue.
Collapse
|
339
|
Flavonoids and Colorectal Cancer Prevention. Antioxidants (Basel) 2018; 7:antiox7120187. [PMID: 30544686 PMCID: PMC6316869 DOI: 10.3390/antiox7120187] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 11/03/2018] [Accepted: 12/04/2018] [Indexed: 12/24/2022] Open
Abstract
Colorectal cancer (CRC) is the third most common cancer, but despite advances in treatment, it remains the second most common cause of cancer-related mortality. Prevention may, therefore, be a key strategy in reducing colorectal cancer deaths. Given reports of an inverse association between fruit and vegetable consumption with colorectal cancer risk, there has been significant interest in understanding the metabolism and bioactivity of flavonoids, which are highly abundant in fruits and vegetables and account for their pigmentation. In this review, we discuss host and microbiota-mediated metabolism of flavonoids and the potential mechanisms by which flavonoids can exert protective effects against colon tumorigenesis, including regulation of signaling pathways involved in apoptosis, cellular proliferation, and inflammation and modulation of the gut microbiome.
Collapse
|
340
|
Rangani J, Kumari A, Patel M, Brahmbhatt H, Parida AK. Phytochemical profiling, polyphenol composition, and antioxidant activity of the leaf extract from the medicinal halophyte Thespesia populnea reveal a potential source of bioactive compounds and nutraceuticals. J Food Biochem 2018; 43:e12731. [PMID: 31353641 DOI: 10.1111/jfbc.12731] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Revised: 10/05/2018] [Accepted: 10/24/2018] [Indexed: 01/16/2023]
Abstract
The present study evaluated the phytochemical constituents, nutritional attributes, and the antioxidant capacity of the medicinal halophyte Thespesia populnea. The metabolite profiling by GC-QTOF-MS analysis identified 37 metabolites among which sucrose, malic acid, and turanose were the most abundant. A total of 18 polyphenols and 17 amino acids were identified by the HPLC-DAD analysis. The most abundant polyphenols in T. populnea were gallic acid, catechin, and myricetin. Other polyphenols like protocatechuic acid, epigallocatechin gallate, rosmarinic acid, ellagic acid, rutin, and naringenine were also detected in ample amounts. The leaf extract demonstrated higher antioxidant as well as lipid peroxidation inhibition activities. A correlation analysis revealed a positive correlation between the antioxidant capacity and the phenolic compounds viz. gallic acid, catechin, myricetin, quercetin, apigenin, cinnamic acid, and coumarin which indicates that these phenolic compounds are the main contributors of the antioxidant potential of T. populnea. The results of this study establish T. populnea as a potential source of nonconventional functional food. PRACTICAL APPLICATIONS: The data presented here indicate that T. populnea can be considered as a nonconventional functional food and potential source of energy, antioxidants, minerals, essential amino acids, and bioactive compounds in herbal formulations, food supplements, or nutraceuticals. The metabolites identified from this halophyte have pharmacological and nutraceutical potentials, suggesting T. populnea as an ideal candidate for application in the food and phytopharmaceutical industries to produce health-promoting products, functional foods, and herbal medicines.
Collapse
Affiliation(s)
- Jaykumar Rangani
- Division of Biotechnology & Phycology, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, India.,Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific and Industrial Research (CSIR), Bhavnagar, India
| | - Asha Kumari
- Division of Biotechnology & Phycology, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, India.,Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific and Industrial Research (CSIR), Bhavnagar, India
| | - Monika Patel
- Division of Biotechnology & Phycology, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, India.,Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific and Industrial Research (CSIR), Bhavnagar, India
| | - Harshad Brahmbhatt
- Analytical and Environmental Science Division and Centralized Instrument Facility, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, India
| | - Asish Kumar Parida
- Division of Biotechnology & Phycology, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar, India.,Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Council of Scientific and Industrial Research (CSIR), Bhavnagar, India
| |
Collapse
|
341
|
Yang Q, Li Y, Luo L. Effect of Myricetin on Primary Open-angle Glaucoma. Transl Neurosci 2018; 9:132-141. [PMID: 30473883 PMCID: PMC6234474 DOI: 10.1515/tnsci-2018-0020] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 08/28/2018] [Indexed: 01/04/2023] Open
Abstract
Background Primary open angle glaucoma (POAG) is the most common form of glaucoma, with a multifactorial etiology that results in retinal ganglion cell death and loss of vision. In this study, we assessed the effects of myricetin on the trabecular meshwork cells in POAG. Methods In the in-vivo model, glaucoma was induced in Sprague-Dawley rats by injecting hyaluronic acid into the anterior chamber of the eye (every week for six-weeks). Treatment group rats were administered myricetin (25, 50 or 100 mg/ kg body weight via oral gavage) each day for of six weeks. Results POAG TM cells exposed to myricetin (25, 50 or 100 μM) exhibited significantly lowered reactive oxidative species (ROS) levels and lipid peroxidation products. The expressions of transforming growth factors (TGFβ1/β2), vascular endothelial growth factor, and senescence markers (senescence associated-β-galactosidase, cyclin-dependent kinase inhibitors-p16 and p21) were substantially down-regulated in POAG TM cells exposed to myricetin. Myricetin effectively prevented IOP elevation in glaucoma-induced rats and decreased inflammatory cytokines (IL-1α, IL-1β, IL-6, Il-8, TNF-α) in the aqueous humor and POAG TM cells of glaucoma-induced rats. Conclusion The observations of the study illustrate the protective effects of myricetin in glaucomatous TM cells.
Collapse
Affiliation(s)
- Qing Yang
- Department of Ophthalmology, Qingdao Municipal Hospital, Qingdao 266011, China
| | - Ying Li
- Department of Ophthalmology, Qingdao Municipal Hospital, Qingdao 266011, China
| | - Lin Luo
- Department of Ophthalmology, Qingdao Municipal Hospital, Qingdao 266011, China
| |
Collapse
|
342
|
Suntres ZE. Exploring the potential benefit of natural product extracts in paraquat toxicity. Fitoterapia 2018; 131:160-167. [PMID: 30359726 DOI: 10.1016/j.fitote.2018.10.026] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2018] [Revised: 10/19/2018] [Accepted: 10/21/2018] [Indexed: 12/11/2022]
Abstract
Paraquat dichloride, a herbicide used for weed and grass control, is extremely toxic to humans and animals. The mechanisms of toxicity involve the redox cycling of paraquat resulting in the generation of reactive oxygen species and the depletion of the cellular NADPH. The major cause of death in paraquat poisoning is respiratory failure due to its specific uptake by and oxidative insult to the alveolar epithelial cells and inflammation with subsequent obliterating fibrosis. Paraquat also causes selective degeneration of dopaminergic neurons in the substantia nigra pars compacta, reproducing an important pathological feature of Parkinson disease. Currently, there are no antidotes for the treatment of paraquat poisoning and therapeutic management is mostly supportive and directed towards changing the disposition of the poison. The lack of effective treatments against paraquat poisoning has led to the exploration of novel compounds with antioxidant and/or anti-inflammatory properties. Recently, there is an interest in plant compounds, particularly those used in traditional medicine. Phytochemicals have been highlighted as a possible therapeutic modality for a variety of diseases due to their putative efficacies and safety. In this review, the status of plant extracts and traditional medicines in ameliorating the toxicity of paraquat is discussed.
Collapse
Affiliation(s)
- Zacharias E Suntres
- Medical Sciences Division, Northern Ontario School of Medicine, Thunder Bay, Ontario, Canada.
| |
Collapse
|
343
|
Huang CY. Crystal structure of SSB complexed with inhibitor myricetin. Biochem Biophys Res Commun 2018; 504:704-708. [DOI: 10.1016/j.bbrc.2018.08.188] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 08/29/2018] [Indexed: 12/14/2022]
|
344
|
Fernández-Rojas B, Gutiérrez-Venegas G. Flavonoids exert multiple periodontic benefits including anti-inflammatory, periodontal ligament-supporting, and alveolar bone-preserving effects. Life Sci 2018; 209:435-454. [DOI: 10.1016/j.lfs.2018.08.029] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Revised: 08/02/2018] [Accepted: 08/11/2018] [Indexed: 12/19/2022]
|
345
|
Evans LW, Ferguson BS. Food Bioactive HDAC Inhibitors in the Epigenetic Regulation of Heart Failure. Nutrients 2018; 10:E1120. [PMID: 30126190 PMCID: PMC6115944 DOI: 10.3390/nu10081120] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2018] [Revised: 08/15/2018] [Accepted: 08/15/2018] [Indexed: 12/21/2022] Open
Abstract
Approximately 5.7 million U.S. adults have been diagnosed with heart failure (HF). More concerning is that one in nine U.S. deaths included HF as a contributing cause. Current HF drugs (e.g., β-blockers, ACEi) target intracellular signaling cascades downstream of cell surface receptors to prevent cardiac pump dysfunction. However, these drugs fail to target other redundant intracellular signaling pathways and, therefore, limit drug efficacy. As such, it has been postulated that compounds designed to target shared downstream mediators of these signaling pathways would be more efficacious for the treatment of HF. Histone deacetylation has been linked as a key pathogenetic element for the development of HF. Lysine residues undergo diverse and reversible post-translational modifications that include acetylation and have historically been studied as epigenetic modifiers of histone tails within chromatin that provide an important mechanism for regulating gene expression. Of recent, bioactive compounds within our diet have been linked to the regulation of gene expression, in part, through regulation of the epi-genome. It has been reported that food bioactives regulate histone acetylation via direct regulation of writer (histone acetyl transferases, HATs) and eraser (histone deacetylases, HDACs) proteins. Therefore, bioactive food compounds offer unique therapeutic strategies as epigenetic modifiers of heart failure. This review will highlight food bio-actives as modifiers of histone deacetylase activity in the heart.
Collapse
Affiliation(s)
- Levi W Evans
- Department of Agriculture, Nutrition, & Veterinary Sciences, University of Nevada, Reno, NV 89557, USA.
- Center for Cardiovascular Research, University of Nevada, Reno, NV 89557, USA.
- Environmental Science & Health, University of Nevada, Reno, NV 89557, USA.
| | - Bradley S Ferguson
- Department of Agriculture, Nutrition, & Veterinary Sciences, University of Nevada, Reno, NV 89557, USA.
- Center for Cardiovascular Research, University of Nevada, Reno, NV 89557, USA.
| |
Collapse
|
346
|
Lucas J, Hsieh TC, Halicka HD, Darzynkiewicz Z, Wu JM. Upregulation of PD‑L1 expression by resveratrol and piceatannol in breast and colorectal cancer cells occurs via HDAC3/p300‑mediated NF‑κB signaling. Int J Oncol 2018; 53:1469-1480. [PMID: 30066852 PMCID: PMC6086626 DOI: 10.3892/ijo.2018.4512] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 06/05/2018] [Indexed: 12/24/2022] Open
Abstract
Programmed cell death ligand 1 (PD-L1) expressed in cancer cells interacting with its receptor programmed cell death 1 (PD-1) expressed in immune cells represents a regulatory axis linked to the suppression and evasion of host immune functions. The blockade of PD-1/PD-L1 interaction using monoclonal antibodies has emerged as an effective therapy for several solid tumors; however, durable response has been observed in a subset of patients with PD-L1-positive tumors. Thus, the understanding of the mechanisms responsible for the expression of PD-L1 in tumor cells may help to improve the response to PD-L1 blockade therapies. In this study, we investigated whether resveratrol, a grape-derived stilbenoid with immunoregulatory activity, modulates the expression of PD-L1 in breast and colorectal cancer cells. The surface expression of PD-L1 was determined by flow cytometry in cancer cells treated with resveratrol and/or piceatannol. Each stilbenoid alone induced PD-L1 and when used in combination, elicited a synergistic upregulation of PD-L1 in some cell lines. The induction of PD-L1 by the combined use of stilbenoids was most pronounced in the Cal51 triple-negative breast cancer (TNBC) and SW620 colon cancer cells. The observed induction of PD-L1 was transcriptionally mediated by nuclear factor (NF)-κB, as shown by NF-κB reporter assays, the nuclear accumulation of the p65 subunit of NF-κB, inhibition by the IKK inhibitor, BMS-345541, and histone the modification inhibitors, resminostat, entinostat or anacardic acid. Combined treatment with resveratrol and piceatannol also decreased tumor cell survival as indicated by the upregulation of the DNA damaging marker, γH2AX, the cleavage of caspase 3, the downregulation of the survival markers, p38-MAPK/c-Myc, and G1-to-S cell cycle arrest.
Collapse
Affiliation(s)
- Justin Lucas
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, USA
| | - Tze-Chen Hsieh
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, USA
| | - H Dorota Halicka
- Brander Cancer Research Institute, Department of Pathology, New York Medical College, Valhalla, NY 10595, USA
| | - Zbigniew Darzynkiewicz
- Brander Cancer Research Institute, Department of Pathology, New York Medical College, Valhalla, NY 10595, USA
| | - Joseph M Wu
- Department of Biochemistry and Molecular Biology, New York Medical College, Valhalla, NY 10595, USA
| |
Collapse
|
347
|
Ren R, Yin S, Lai B, Ma L, Wen J, Zhang X, Lai F, Liu S, Li L. Myricetin antagonizes semen-derived enhancer of viral infection (SEVI) formation and influences its infection-enhancing activity. Retrovirology 2018; 15:49. [PMID: 30012153 PMCID: PMC6048764 DOI: 10.1186/s12977-018-0432-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Accepted: 07/10/2018] [Indexed: 11/25/2022] Open
Abstract
Background Semen is a critical vector for human immunodeficiency virus (HIV) sexual transmission and harbors seminal amyloid fibrils that can markedly enhance HIV infection. Semen-derived enhancer of viral infection (SEVI) is one of the best-characterized seminal amyloid fibrils. Due to their highly cationic properties, SEVI fibrils can capture HIV virions, increase viral attachment to target cells, and augment viral fusion. Some studies have reported that myricetin antagonizes amyloid β-protein (Aβ) formation; myricetin also displays strong anti-HIV activity in vitro. Results Here, we report that myricetin inhibits the formation of SEVI fibrils by binding to the amyloidogenic region of the SEVI precursor peptide (PAP248–286) and disrupting PAP248–286 oligomerization. In addition, myricetin was found to remodel preformed SEVI fibrils and to influence the activity of SEVI in promoting HIV-1 infection. Moreover, myricetin showed synergistic effects against HIV-1 infection in combination with other antiretroviral drugs in semen. Conclusions Incorporation of myricetin into a combination bifunctional microbicide with both anti-SEVI and anti-HIV activities is a highly promising approach to preventing sexual transmission of HIV. Electronic supplementary material The online version of this article (10.1186/s12977-018-0432-3) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Ruxia Ren
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China.,Department of Pharmacy, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, 518107, China
| | - Shuwen Yin
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China
| | - Baolong Lai
- Department of Pharmacy, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, 518107, China
| | - Lingzhen Ma
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China
| | - Jiayong Wen
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China
| | - Xuanxuan Zhang
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China
| | - Fangyuan Lai
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China
| | - Shuwen Liu
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China.
| | - Lin Li
- Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, 510515, Guangdong, China.
| |
Collapse
|
348
|
Shirai N. Assay of Flavonol Contents in Tea Leaves and Infusions. J JPN SOC FOOD SCI 2018. [DOI: 10.3136/nskkk.65.357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Nobuya Shirai
- National Agriculture and Food Research Organization, Institute of Fruit Tree and Tea Science
| |
Collapse
|
349
|
Inhibitory effects of Myricetin derivatives on curli-dependent biofilm formation in Escherichia coli. Sci Rep 2018; 8:8452. [PMID: 29855532 PMCID: PMC5981455 DOI: 10.1038/s41598-018-26748-z] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 05/18/2018] [Indexed: 01/09/2023] Open
Abstract
Biofilms are well-organised communities of microbes embedded in a self-produced extracellular matrix (e.g., curli amyloid fibers) and are associated with chronic infections. Therefore, development of anti-biofilm drugs is important to combat with these infections. Previously, we found that flavonol Myricetin inhibits curli-dependent biofilm formation by Escherichia coli (IC50 = 46.2 μM). In this study, we tested activities of seven Myricetin-derivatives to inhibit biofilm formation by E. coli K-12 in liquid culture. Among them, only Epigallocatechin gallate (EGCG), a major catechin in green tea, inhibited biofilm formation of K-12 (IC50 = 5.9 μM) more efficiently than Myricetin. Transmission electron microscopy and immunoblotting analyses demonstrated that EGCG prevented curli production by suppressing the expression of curli-related proteins. Quantitative RT-PCR analysis revealed that the transcripts of csgA, csgB, and csgD were significantly reduced in the presence of EGCG. Interestingly, the cellular level of RpoS, a stationary-phase specific alternative sigma factor, was reduced in the presence of EGCG, whereas the rpoS transcript was not affected. Antibiotic-chase experiments and genetic analyses revealed that EGCG accelerated RpoS degradation by ATP-dependent protease ClpXP in combination with its adaptor RssB. Collectively, these results provide significant insights into the development of drugs to treat chronic biofilm-associated infections.
Collapse
|
350
|
Park H, Park S, Bazer FW, Lim W, Song G. Myricetin treatment induces apoptosis in canine osteosarcoma cells by inducing DNA fragmentation, disrupting redox homeostasis, and mediating loss of mitochondrial membrane potential. J Cell Physiol 2018; 233:7457-7466. [PMID: 29663365 DOI: 10.1002/jcp.26598] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Accepted: 03/14/2018] [Indexed: 01/25/2023]
Abstract
Canine osteosarcoma is an aggressive primary bone tumor that shows metastasis to distal regions and is associated with a high mortality rate. However, the pathophysiological mechanisms of canine osteosarcoma are not well characterized. In addition, development of prognostic factors and novel therapeutic agents is necessary to efficiently treat osteosarcoma. Therefore, we studied the effects of myricetin, an antioxidant found in berries, nuts, teas, wine, and vegetables, on apoptosis and signal transduction in the canine osteosarcoma cell lines, D-17 and DSN. Results of the present study demonstrated that treatment with myricetin decreased cell proliferation and DNA replication, while it increased apoptotic DNA fragmentation in D-17 and DSN cells. In addition, it increased generation of ROS, lipid peroxidation, and depolarization of MMP in both D-17 and DSN cells. Myricetin treatment activated phosphorylation of AKT, p70S6K, ERK1/2, JNK, and p90RSK in canine osteosarcoma cells. Moreover, inhibition of PI3K and MAPK using LY294002, U0126, or SP600125, in addition to myricetin treatment, effectively suppressed cell proliferation compared to treatment with myricetin or each inhibitor alone. Therefore, we concluded that myricetin may be a potentially effective and less toxic therapeutic agent to prevent and control progression of canine osteosarcoma.
Collapse
Affiliation(s)
- Hahyun Park
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Sunwoo Park
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| | - Fuller W Bazer
- Center for Animal Biotechnology and Genomics and Department of Animal Science, Texas A&M University, College Station, Texas
| | - Whasun Lim
- Department of Biomedical Sciences, Catholic Kwandong University, Gangneung, Republic of Korea
| | - Gwonhwa Song
- Institute of Animal Molecular Biotechnology and Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, Republic of Korea
| |
Collapse
|