Polyphenolic composition of grape stem extracts affects antioxidant activity in endothelial and muscle cells

Goutzourelas,Nikolaos; Stagos,Dimitrios; Spanidis,Ypatios; Liosi,Maria; Apostolou,Anna; Priftis,Alexandros; Haroutounian,Serko; Spandidos,Demetrios A.; Tsatsakis,Aristidis   M.; Kouretas,Demetrios

doi:10.3892/mmr.2015.4216

Polyphenolic composition of grape stem extracts affects antioxidant activity in endothelial and muscle cells

Authors:
- Nikolaos Goutzourelas
- Dimitrios Stagos
- Ypatios Spanidis
- Maria Liosi
- Anna Apostolou
- Alexandros Priftis
- Serko Haroutounian
- Demetrios A. Spandidos
- Aristidis M. Tsatsakis
- Demetrios Kouretas
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Affiliations: Department of Biochemistry and Biotechnology, University of Thessaly, 41221 Larissa, Greece, Laboratory of Nutrition Physiology and Feeding, Agricultural University of Athens, 11855 Athens, Greece, Laboratory of Clinical Virology, Medical School, University of Crete, 71409 Heraklion, Greece, Department of Forensic Sciences and Toxicology, Medical School, University of Crete, 71003 Heraklion, Greece
Published online on: August 12, 2015 https://doi.org/10.3892/mmr.2015.4216
Pages: 5846-5856
Copyright: © Goutzourelas et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

The aim of the present study was the assessment of the antioxidant effects of polyphenolic extracts derived from the stems of three Greek grape varieties (Moshomayro, Mavrotragano and Mandilaria) in endothelial (EA.hy926) and muscle (C2C12) cells. We also investigated the effects of the polyphenolic composition on the antioxidant effects of the grape stem extracts. For this purpose, the endothelial and muscle cells were treated with low non-cytotoxic concentrations of the extracts for 24 h in order to assess the effects of the extracts on cellular redox status using oxidative stress biomarkers. The oxidative stress markers were thiobarbituric acid reactive substances (TBARS), protein carbonyl (CARB) levels, reactive oxygen species (ROS) levels and glutathione (GSH) levels. The results revealed that treatment of the EA.hy926 cells with Mandilaria extract significantly decreased the TBARS levels by 14.8% and the CARB levels by 25.9 %, while it increased the GSH levels by 15.8% compared to the controls. Moreover, treatment of the EA.hy926 cells with Mavrotragano extract significantly increased the GSH levels by 20.2%, while it significantly decreased the TBARS and CARB levels by 12.5% and 16.6%, respectively. Treatment of the C2C12 cells with Mandilaria extract significantly decreased the TBARS levels by 47.3 %, the CARB levels by 39.0 % and the ROS levels by 21.8%, while it increased the GSH levels by 22.6% compared to the controls. Moreover, treatment of the C2C12 cells with Mavrotragano significantly decreased the TBARS, CARB and ROS levels by 36.2%, 35.9% and 16.5%, respectively. In conclusion, to the best of our knowledgel, our results demonstrate for the first time that treatment with grape stem extracts at low concentrations improves the redox status of endothelial and muscle cells. Thus, grape stem extracts may be used for developing antioxidant food supplements or biofunctional foods. However, it was also found that the polyphenolic composition of grape stem extracts affects their antioxidant capacity. For example, the results suggested that trans-resveratrol, gallic acid, (+)-catechin, ferulic acid, caffeic acid, quercetin, coumaric acid and kaempferol may be essential for the antioxidant activity of grape stem extracts.

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