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Epicatechin

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https://www.readbyqxmd.com/read/28936872/characterization-of-lipophilized-monomeric-and-oligomeric-grape-seed-flavan-3-ol-derivatives
#1
Mingshun Chen, Shu-Juan Yu
Grape seed proanthocyanidins, compose of flavan-3-ols of different degree of polymerization, are natural food antioxidant. Flavan-3-ols in grape seed are usually polyhydroxy derivatives which exhibiting hydrophilic character. Monomeric and oligomeric flavan-3-ols were modified structurally to improve their lipophilicity, expand their application in lipophilic media, and enhance their cellular absorption in the body. Esterification of the water-soluble flavan-3-ols was prepared by Lipozyme TL IM with lauric acid, and their enhanced lipophilicity was confirmed by 1-octanol/water partition coefficient...
September 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28933120/-explore-anti-atherosclerotic-mechanism-of-component-compatibility-of-danshen-and-shanzha-based-on-network-pharmacology-and-cell-level
#2
Jian-Yong Zhang, Lan Wang, Ri-Xin Liang, Bin Yang
To explore the anti-atherosclerotic mechanism of active component compatibility of Danshen and Shanzha (SC121) based on network pharmacology and in vitro research validation with cell model. On one hand, according to the chemical structures and pharmacological activities of the compounds reported in Danshen and Shanzha, 5 compounds, i.e., salvianolic acid B, tanshinone ⅡA, tanshinol, epicatechin and procyanidin B2 were chosen and used for network pharmacology analysis. Then the TCMSP(http://lsp.nwsuaf.edu...
December 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28927293/antileishmanial-and-antioxidant-potential-of-fractions-and-isolated-compounds-from-nectandra-cuspidata
#3
Lilian Dos Anjos Oliveira Ferreira, Mariana Maciel de Oliveira, Flávia Lais Faleiro, Débora Botura Scariot, Joana Schuelter Boeing, Jesuí Vergílio Visentainer, Mariza Barion Romagnolo, Celso Vataru Nakamura, Maria da Conceição Torrado Truiti
The effects on the viability of promastigote and amastigote forms of Leishmania (Leishmania) amazonensis and citotoxicity in J774.A1 macrophages of ethanolic extract, fractions and isolated compounds that were obtained from the leaves of Nectandra cuspidata were determined. The total phenolics content (TP) and antioxidant activity were assessed using different assays. The ethyl acetate fraction (EAF) had the best antiproliferative activity (amastigote IC50: 4.42 ± 0.60 μg/mL, promastigote IC50: 33.33 ± 0...
September 19, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28925165/-effects-of-sanguisorba-tannins-and-saponins-compatibility-on-pharmacokinetic-parameters-of-catechin-epicatechin-and-ziyuglycoside-%C3%A2-in-rats
#4
Yong-Ai Xiong, Ming Yang
To study the effects of sanguisorba tannins and saponins compatibility at different proportions [tannins-saponins (1∶1) and tannins-saponins(8∶1)] after intragastric administration (50 mg•kg⁻¹) on pharmacokinetic parameters of catechin, epicatechin and ziyuglycoside Ⅰ in rats by using pharmacokinetic techniques and methods. Kinetica 5.0 software was used to calculate the pharmacokinetic parameters. The results showed that the specificity, linearity, recovery rate, precision and stability of the established detection method were in line with the test requirements...
October 2016: Zhongguo Zhong Yao za Zhi, Zhongguo Zhongyao Zazhi, China Journal of Chinese Materia Medica
https://www.readbyqxmd.com/read/28919675/therapeutic-uses-of-epicatechin-in-diabetes-and-cancer
#5
REVIEW
Layth Abdulmajeed Abdulkhaleq, Mohammed Abdulrazzaq Assi, Mohd Hezmee Mohd Noor, Rasedee Abdullah, Mohd Zamri Saad, Yun Hin Taufiq-Yap
Epicatechin is a natural flavonoid found in green tea. It has been reported to possess an immense antioxidant effect which contributes to its therapeutic effect against a handful of ailments. In this review, we discuss its therapeutic role in the management of two of the most important human diseases; diabetes and cancer. The consumption of epicatechin has been shown to reduce blood glucose levels in diabetic patients, while is anticancer effect was attributed to its antioxidant properties, antiangiogenic and direct cytotoxicity to cancer cells...
August 2017: Veterinary World
https://www.readbyqxmd.com/read/28914949/influence-of-flavonol-rich-excipient-food-onion-peel-and-dendropanax-morbifera-on-the-bioavailability-of-green-tea-epicatechins-in-vitro-and-in-vivo
#6
Eun-Hye Choi, Da-Yeon Lee, SuKyung Kim, Jin-Oh Chung, Jin-Kyu Choi, Kyung-Mi Joo, Hyun Woo Jeong, Jeong Kee Kim, Wan Gi Kim, Soon-Mi Shim
The impacts of onion peel (OP) and Dendropanax morbifera (DM), as excipient foods rich in flavonols, on the digestive recovery, intestinal absorption, and pharmacokinetics of GT epicatechins were studied via an in vitro digestion model system with Caco-2 cells and an in vivo study. The digestive stability of total epicatechins recovered from GT upon the addition of 2% DM was up to 1.12 times higher than that observed with OP. The combined effects of OP and DM, which were observed with 2% OP + DM in a ratio of 1 : 4 (w : w), significantly increased (by a factor of 1...
September 15, 2017: Food & Function
https://www.readbyqxmd.com/read/28914789/phytochemical-constituents-health-benefits-and-industrial-applications-of-grape-seeds-a-mini-review
#7
REVIEW
Zheng Feei Ma, Hongxia Zhang
Grapes are one of the most widely grown fruits and have been used for winemaking since the ancient Greek and Roman civilizations. Grape seeds are rich in proanthocyanidins which have been shown to possess potent free radical scavenging activity. Grape seeds are a complex matrix containing 40% fiber, 16% oil, 11% proteins, and 7% complex phenols such as tannins. Grape seeds are rich sources of flavonoids and contain monomers, dimers, trimers, oligomers, and polymers. The monomeric compounds includes (+)-catechins, (-)-epicatechin, and (-)-epicatechin-3-O-gallate...
September 15, 2017: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/28911654/extraction-optimization-of-gallic-acid-catechin-%C3%A2-procyanidin-b2-epicatechin-epigallocatechin-gallate-and-epicatechin-gallate-their-simultaneous-identification-and-quantification-in-saraca-asoca
#8
Tushar Dhanani, Raghuraj Singh, Satyanshu Kumar
The objective of the present investigation was to optimize extraction conditions for maximum recovery of bioactive phenolics from different parts of Saraca asoca. Extraction recovery was optimized using a mixture of methanol and water in different proportions. For identification and quantification of six analytes, a rapid reversed phase ultra-performance liquid chromatography (UPLC) photo diode array detection method was developed. UPLC separation was achieved in a gradient elution mode on a C18 column with acetonitrile and aqueous phosphoric acid (0...
July 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28911633/an-analysis-method-for-flavan-3-ols-using-high-performance-liquid-chromatography-coupled-with-a-fluorescence-detector
#9
Liuqing Wang, Yoko Yamashita, Akiko Saito, Hitoshi Ashida
Procyanidins belong to a family of flavan-3-ols, which consist of monomers, (+)-catechin and (-)-epicatechin, and their oligomers and polymers, and are distributed in many plant-derived foods. Procyanidins are reported to have many beneficial physiological activities, such as antihypertensive and anticancer effects. However, the bioavailability of procyanidins is not well understood owing to a lack of convenient and high-sensitive analysis methods. The aim of this study was to develop an improved method for determining procyanidin content in both food materials and biological samples...
July 2017: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28911621/in%C3%A2-vitro-prebiotic-effects-and-quantitative-analysis-of-bulnesia-sarmienti-extract
#10
Md Ahsanur Reza, Md Akil Hossain, Seung-Jin Lee, Jong-Choon Kim, Seung-Chun Park
Prebiotics are used to influence the growth, colonization, survival, and activity of probiotics, and enhance the innate immunity, thus improving the health status of the host. The survival, growth, and activity of probiotics are often interfered with by intrinsic factors and indigenous microbes in the gastrointestinal tract. In this study, Bulnesia sarmienti aqueous extract (BSAE) was evaluated for the growth-promoting activity of different strains of Lactobacillus acidophilus, and a simple, precise, cost-effective high-performance liquid chromatography (HPLC) method was developed and validated for the determination of active prebiotic ingredients in the extract...
October 2016: Journal of Food and Drug Analysis
https://www.readbyqxmd.com/read/28902886/metabolic-engineering-to-simultaneously-activate-anthocyanin-and-proanthocyanidin-biosynthetic-pathways-in-nicotiana-spp
#11
Sandra Fresquet-Corrales, Edelín Roque, Alejandro Sarrión-Perdigones, Maricruz Rochina, María P López-Gresa, Huertas M Díaz-Mula, José M Bellés, Francisco Tomás-Barberán, José P Beltrán, Luis A Cañas
Proanthocyanidins (PAs), or condensed tannins, are powerful antioxidants that remove harmful free oxygen radicals from cells. To engineer the anthocyanin and proanthocyanidin biosynthetic pathways to de novo produce PAs in two Nicotiana species, we incorporated four transgenes to the plant chassis. We opted to perform a simultaneous transformation of the genes linked in a multigenic construct rather than classical breeding or retransformation approaches. We generated a GoldenBraid 2.0 multigenic construct containing two Antirrhinum majus transcription factors (AmRosea1 and AmDelila) to upregulate the anthocyanin pathway in combination with two Medicago truncatula genes (MtLAR and MtANR) to produce the enzymes that will derivate the biosynthetic pathway to PAs production...
2017: PloS One
https://www.readbyqxmd.com/read/28888437/differences-in-the-metabolic-profiles-and-antioxidant-activities-of-wild-and-cultivated-black-soybeans-evaluated-by-correlation-analysis
#12
Jiu Liang Xu, Jeong-Sook Shin, Soo-Kwon Park, Sungtaeg Kang, Soon-Chun Jeong, Jung-Kyung Moon, Yongsoo Choi
Wild soybeans are considered a potential resource for soybean domestication and an important source of genetic diversity for soybean crop improvement. Understanding metabolite-caused bioactivity differences between cultivated and wild soybeans is essential for designing a soybean with enhanced nutritional traits. In this study, the non-targeted metabolic profiling of 26 soybean varieties, 15 wild black soybeans (WBS) and 11 cultivated black soybeans (CBS), using liquid chromatography-mass spectrometry (LC-MS) in combination with multivariate analysis revealed significant differences in 25 differential metabolites...
October 2017: Food Research International
https://www.readbyqxmd.com/read/28887677/evolutionary-and-functional-characterization-of-leucoanthocyanidin-reductases-from-camellia-sinensis
#13
Peiqiang Wang, Lingjie Zhang, Xiaolan Jiang, Xinlong Dai, Lijuan Xu, Tong Li, Dawei Xing, Yanzhi Li, Mingzhuo Li, Liping Gao, Tao Xia
LARs promoted the biosynthesis of catechin monomers and inhibited their polymerization. The accumulation of catechin monomers and polymers was increased by up-regulating the expression of NtLAR and NtANR s in CsMYB5b transgenic tobacco. Tea is rich in polyphenolic compounds, and catechins are the major polyphenols in tea. The biosynthesis of polyphenols is closely related to the expression of the leucoanthocyanidin reductase (LAR) and anthocyanidin reductase (ANR) genes. In this paper, an evolutionary analysis and functional characterization of three CsLARs were performed...
September 8, 2017: Planta
https://www.readbyqxmd.com/read/28884178/screening-of-potential-anti-adipogenic-effects-of-phenolic-compounds-showing-different-chemical-structure-in-3t3-l1-preadipocytes
#14
Andrea Mosqueda-Solís, Arrate Lasa, Saioa Gómez-Zorita, Itziar Eseberri, Catalina Picó, María P Portillo
This study was designed to analyze the anti-adipogenic effect of fifteen phenolic compounds from various chemical groups in 3T3-L1 pre-adipocytes. Cells were treated with 25 μM, 10 μM or 1 μM of apigenin, luteolin, catechin, epicatechin, epigallocatechin, genistein, daizein, naringenin, hesperidin, quercetin, kaempferol, resveratrol, vanillic acid, piceatannol and pterostilbene for 8 days. At 25 μM lipid accumulation was reduced by all the compounds, with the exception of catechin, epicatechin and epigallocatechin...
September 8, 2017: Food & Function
https://www.readbyqxmd.com/read/28881278/deciphering-the-interplay-among-genotype-maturity-stage-and-low-temperature-storage-on-phytochemical-composition-and-transcript-levels-of-enzymatic-antioxidants-in-prunus-persica-fruit
#15
George A Manganaris, Pavlina Drogoudi, Vlasios Goulas, Georgia Tanou, Egli C Georgiadou, George E Pantelidis, Konstantinos A Paschalidis, Vasileios Fotopoulos, Athanasios Manganaris
The aim of this study was to understand the antioxidant metabolic changes of peach (cvs. 'Royal Glory', 'Red Haven' and 'Sun Cloud') and nectarine fruits (cv. 'Big Top') exposed to different combinations of low-temperature storage (0, 2, 4 weeks storage at 0 °C, 90% R.H.) and additional ripening at room temperature (1, 3 and 5 d, shelf life, 20 °C) with an array of analytical, biochemical and molecular approaches. Initially, harvested fruit of the examined cultivars were segregated non-destructively at advanced and less pronounced maturity stages and qualitative traits, physiological parameters, phytochemical composition and antioxidant capacity were determined...
August 24, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28878178/microwave-assisted-extraction-of-natural-antioxidants-from-the-exotic-gordonia-axillaris-fruit-optimization-and-identification-of-phenolic-compounds
#16
Ya Li, Sha Li, Sheng-Jun Lin, Jiao-Jiao Zhang, Cai-Ning Zhao, Hua-Bin Li
Our previous study reported that the fruit of Gordonia axillaris , an edible wild fruit, possessed strong antioxidant activity. In this study, a microwave-assisted extraction (MAE) method was established to extract antioxidants from the fruit of Gordonia axillaris . The influence of five parameters, including ethanol concentration, solvent/material ratio, extraction time, extraction temperature and microwave power, was investigated by single-factor experiments. Three factors, namely ethanol concentration, solvent/material ratio, extraction time, were found to exert a major influence on extraction efficacy, and were further studied by response surface methodology to investigate their interactions...
September 6, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28873557/a-rapid-simultaneous-determination-of-methylxanthines-and-proanthocyanidins-in-brazilian-guaran%C3%A3-paullinia-cupana-kunth
#17
Kamilla Nunes Machado, Aline Alves de Freitas, Luzia Helena Cunha, André Augusto Gomes Faraco, Rodrigo Maia de Pádua, Fernão Castro Braga, Cristina Duarte Vianna-Soares, Rachel Oliveira Castilho
Paullinia cupana is a plant native to Brazil that is widely used in traditional medicine as a physical and mental stimulant. It is also used worldwide to produce soft drinks. A method for the simultaneous quantitation of seven markers in guaraná by HPLC-PDA was developed, and extraction methods for the determination of methylxanthines and tannins were investigated. Quantified substances were theobromine, theophylline, caffeine, catechin, epicatechin, procyanidins A2 and B2. Results confirmed the satisfactory selectivity and linearity (r(2)≥0...
January 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/28867958/relationships-between-bioactive-compound-content-and%C3%A2-the-antiplatelet-and-antioxidant-activities-of-six-allium-vegetable-species
#18
Hebe Vanesa Beretta, Florencia Bannoud, Marina Insani, Federico Berli, Pablo Hirschegger, Claudio Rómulo Galmarini, Pablo Federico Cavagnaro
Allium sp. vegetables are widely consumed for their characteristic flavour. Additionally, their consumption may provide protection against cardiovascular disease due to their antiplatelet and antioxidant activities. Although antiplatelet and antioxidant activities in Allium sp. are generally recognised, comparative studies of antiplatelet and antioxidant potency among the main Allium vegetable species are lacking. Also, the relationship between organosulfur and phenolic compounds and these biological activities has not been well established...
June 2017: Food Technology and Biotechnology
https://www.readbyqxmd.com/read/28866888/additive-capacity-of-6-shogaol-and-epicatechin-to-trap-methylglyoxal
#19
Qiju Huang, Pei Wang, Yingdong Zhu, Lishuang Lv, Shengmin Sang
Methylglyoxal (MGO), a reactive dicarbonyl species, is thought to contribute to the development of long-term pathological diabetes as a direct toxin or as an active precursor of advanced glycation end products (AGEs). Trapping MGO by dietary phenols to inhibit the MGO induced AGE formation is an approach for alleviating diabetic complications. The present study investigated whether dietary compounds with different structures and active sites have the additive capacity to trap MGO. Ginger phenolic constituent [6]-shogaol and tea flavonoid (-)-epicatechin were selected and tested under simulated physiological conditions, showing that they additively trapped about 41% MGO at a concentration of 10 μM within 24 h...
September 18, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28855126/effects-of-epicatechin-on-frontal-cortex-dapc-and-dysbindin-of-the-mdx-mice
#20
Francisco J Estrada-Mena, Alonso Rodriguez, Patricia Mendoza-Lorenzo, Teresa Neri-Gomez, Gabriel Manjarrez-Gutierrez, Andric C Perez-Ortiz, Rosa Ordonez-Razo, Guillermo Ceballos, Francisco Villarreal, Israel Ramirez-Sanchez
INTRODUCTION: Multiple components of the dystrophin-associated protein complex (DAPC) are expressed in numerous tissues including the brain. Members of the DAPC and dysbindin are abnormally expressed in the brain of Duchenne Muscular Dystrophy (DMD) patients, which has been associated with cognitive impairments. However, little is known about the expression pattern of individual members of the DAPC in animal models of DMD and their relationship with dysbindin. METHODS: Ten mdx mice were randomly allocated into a control and intervention group [(-)-epicatechin (Epi) 1mg/kg/day for four weeks] and results compared to a wild-type mice...
August 31, 2017: Neuroscience Letters
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