The aim of this study was to develop a preparation of a hydroalcoholic extract of Quercus infectoria in order to study the physicochemical parameters, and to identify and quantitatively determine the amount of Polyphenols and Tannin in the galls and in the extract. Preparation of an extract rich in Tannin from the galls of Quercus infectoria, as an astringent, can make incorporation into recta...

Polyphenols are antioxidant molecules found in many foods including nuts, fruits, vegetables, chocolate, wine, and tea. Polyphenols have antimicrobial, anti-inflammatory, and antineoplastic properties. Recent studies suggest that tea polyphenols may be used for reducing sebum production in the skin and for treatment of acne vulgaris. This review examines the evidence for use of topically and or...

Red wine polyphenol extracts (polyphenols) ameliorate cardiovascular and metabolic disorders associated with obesity. Previously, we demonstrated that the alpha isoform of estrogen receptor (ERα) triggers the vascular protection of polyphenols. Here, we investigated the contribution of ERα on the effects of polyphenols on cardiovascular and metabolic alterations associated with obesity. We used...

Polyphenols are abundant micronutrients in our diet, and evidence for their role in the prevention of degenerative diseases such as cancer and cardiovascular diseases is emerging. The health effects of polyphenols depend on the amount consumed and on their bioavailability. In this article, the nature and contents of the various polyphenols present in food sources and the influence of agricultur...

The biological activity of polyphenols in vitro reflects their affinity for cell membranes and the amount of cellular incorporation. The interaction of polyphenols with phosphatidylcholine was investigated by HPLC with an immobilized artificial membrane (IAM) column. The IAM partition coefficients (K(IAM)) of the polyphenols, calculated by retention times, correlated well with the amounts of po...

Lignin-like polymerized polyphenols strongly activate lymphocytes and induce cytokine synthesis. We aimed to characterise the mechanisms of action of polymerized polyphenols on immunomodulating functions. We compared the reactivity of leukocytes from various organs to that of polymerized polyphenols. Splenocytes and resident peritoneal cavity cells (PCCs) responded to polymerized polyphenols an...

Epidemiological studies have reported a greater reduction in cardiovascular risk and metabolic disorders associated with diets rich in polyphenols. The antioxidant effects of polyphenols are attributed to the regulation of redox enzymes by reducing reactive oxygen species production from mitochondria, NADPH oxidases and uncoupled endothelial NO synthase in addition to also up-regulating multipl...

Green tea polyphenols are a natural product which has antioxidative and antiapoptotic effects. It has been shown that glutamate excitotoxicity induced oxidative stress is linked to neurodegenerative diseases such as Alzheimer's disease and Parkinson's disease. In this study we explored the neuroprotective effect of green teen polyphenols against glutamate excitotoxicity in the primary cultured ...

Plant polyphenols are found in foods such as tea, apples, onions, berries, citrus fruits, plums, broccoli, cocoa, and coffee. Epigallocatechin-3-gallate, chlorogenic acid, curcumin, quercetin, and resveratrol are representative polyphenols and have been extensively studied for their health benefits. This review article provides evidence derived from epidemiological, clinical, and laboratory stu...

The aim of this study was to develop a preparation of a hydroalcoholic extract of Quercus infectoria in order to study the physicochemical parameters, and to identify and quantitatively determine the amount of Polyphenols and Tannin in the galls and in the extract. Preparation of an extract rich in Tannin from the galls of Quercus infectoria, as an astringent, can make incorporation into recta...