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Abstract Title:

Effect of polyphenols from coffee and grape on gene expression in myoblasts.

Abstract Source:

Mech Ageing Dev. 2017 Nov 23. Epub 2017 Nov 23. PMID: 29174054

Abstract Author(s):

Alexandros Priftis, Nikolaos Goutzourelas, Maria Halabalaki, Georgia Ntasi, Dimitrios Stagos, Grigorios D Amoutzias, Leandros A Skaltsounis, Dimitrios Kouretas

Article Affiliation:

Alexandros Priftis

Abstract:

Coffee and grape contain various bioactive compounds like polyphenols that may exert beneficial effects, especially antioxidant activity, on human health upon consumption. However, the molecular mechanisms through which these effects are achieved are not fully elucidated. Thus, in the present study in order to investigate these mechanisms, a whole genome expression DNA microarray analysis was carried out in myoblasts treated with polyphenols of coffee and grape pomace at concentrations that improved the redox status. Grape was composed of catechin, epicatechin, cyanidin, malvidin, delphinidin, petunidin, myrtillin, kuromanin, oenin, peonidin, quercetin, gallic acid and caftaric acid as LC-MS revealed, with a total polyphenolic content (TPC) of 648 mg of gallic acid equivalents/g of dry matter. Coffee had a TPC of 42.61 mg GAE/g coffee and was composed of 3-chlorogenic acid (16.61 mg/g), 4- and 5-chlorogenic acids (13.62 mg/g), as UHPLC-HRMS revealed. According to the results, grape polyphenols altered mainly the expression of cytoskeleton and differentiation-associated genes, while coffee compounds had a more profound effect, on the expression levels of many metabolic and antioxidant genes possibly through the nuclear factor (erythroid-derived 2) like-2 (Nrf2) pathway.

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