نتایج جستجو برای: theaflavin
تعداد نتایج: 200 فیلتر نتایج به سال:
Among black tea polyphenols, theaflavins were generally considered to be the most effective in cancer chemoprevention. In this study, we examined the inhibitory effects of black tea polyphenols, including theaflavin (TF-1), a mixture (TF-2) of theaflavin-3-gallate and theaflavin-3'-gallate, theaflavin-3,3'-digallate (TF-3), and the green tea polyphenol (-)-epigallocatechin-3-gallate (EGCG) on 1...
ABSTRACT: To help meet the needs of consumers, producers of dietary tea supplements, and researchers for information on health-promoting tea compounds, we compared the following conditions for the extraction of tea leaves and green tea-containing dietary supplements: 80% ethanol/water at 60 ◦C for 15 min and boiled water for 5 min. The following 7 catechins, 4 theaflavins, and 3 alkaloids were ...
(-)-Epicatechin (EC), (-)-epigallocatechin (EGC), (-)-epicatechin gallate (ECg), and (-)-epigallocatechin gallate (EGCg) were prepared from crude catechins (containing 90% cateehin in total) as described in our previous paper,i) Crude theaflavins, theafiavin (TFI), theaflavin monogallate A (TF2A), theafiavin monogallate B (TF2B), and theaflavin digallate (TF3) were prepared from black tea by ou...
Coronaviruses cause mild to severe respiratory infections. The highly contagious SARS-CoV-2 new coronavirus caused a global outbreak of atypical viral pneumonia in late 2019. Acute distress syndrome, multiple organ failure, and death can result from the infection. This study aimed evaluate possible inhibition activity numerous medicinal plants' bioactive compounds against three non-structural p...
Epidemiological studies suggest health-protective effects of flavan-3-ols and their derived compounds on chronic diseases. The present study aimed to estimate dietary flavan-3-ol, proanthocyanidin (PA) and theaflavin intakes, their food sources and potential determinants in the European Prospective Investigation into Cancer and Nutrition (EPIC) calibration cohort. Dietary data were collected us...
Theaflavin (TF-1), theaflavin-3-monogallate and theaflavin-3'-monogallate mixture (TF-2), and theaflavin-3,3'-digallate (TF-3) are the major black tea polyphenols. Here we compared the effects of these polyphenols on cell growth, apoptosis, and gene expression in normal and cancerous cells. We showed that TF-2 (10-50 microM) inhibited the growth of SV40 transformed WI38 human cells (WI38VA) and...
BACKGROUND Theaflavins including theaflavin (TF), theaflavin-3-gallate (TF3G), theaflavin-3'-gallate (TF3'G), and theaflavin-3,3'-digallate (TFDG), are the most important bioactive polyphenols in black tea. Because of their poor systemic bioavailability, it is still unclear how these compounds can exert their biological functions. The objective of this study is to identify the microbial metabol...
INTRODUCTION Acinetobacter baumannii is an important human nosocomial pathogen; most clinical isolates are multidrug-resistant (MDR). Infections caused by A. baumannii often lead to high morbidity and mortality, with limited treatment options. Owing to the small number of anti-Gram-negative antibiotics in the development pipeline, researchers are looking to other natural compounds. The aim of t...
Flavonoids are a sort of natural substance which basically plant secondary metabolites having polyphenolic structure present in wide range food products. have become vital constituent nutraceutical, pharmacological, therapeutic, and cosmetic fields. This is owing to their capability regulate essential cellular enzyme activity along with anti-cancer, anti-oxidative, anti-mutagenic, anti-inflamma...
meta]loproteinases (MMPs), probably including MMP-2 and MMP-9, which may be involyed in tumor cell inyasion and metastasis. Theafiayin and theaflavin digallate also inhibited MMPs from the cu]ture inedium of these tumor cells, as did (-)-epigallocatechin gallate. These results suggest that theaffayin, theaffayin digallate, and (-)-epigallecatechin gallate inhibit umor cell inyasien by inhibitin...
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