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In depth study of phenolic profile and PTP-1B inhibitory power of cold-pressed grape seed oils of different varieties. | LitMetric

In depth study of phenolic profile and PTP-1B inhibitory power of cold-pressed grape seed oils of different varieties.

Food Chem

Dipartimento di NEUROFARBA, and Multidisciplinary Centre of Research on Food Sciences (M.C.R.F.S.-Ce.R.A), Università degli Studi di Firenze, Via Ugo Schiff 6, 50019 Sesto F.no (Firenze), Italy. Electronic address:

Published: January 2019

AI Article Synopsis

Article Abstract

This paper investigates the phenolic composition of 17 monocultivar commercial cold-pressed grape seed oils. Chromatographic profiles showed the presence of more than 28 molecules, 11 of which were successfully identified by HPLC-DAD-MS-TOF and HPLC-FLD analysis. Pinoresinol, ethyl caffeate and ethyl gallate were detected for the first time in these oils. The total phenolic content ranged between 0.83 mg/kg for Viognier sample to 15.16 mg/kg for Merlot org sample. The detected ethyl esters can be suggested as markers to evaluate the intensity of fermentation in grape seeds before oil extraction, and to control the sensorial quality of the produced oils. In addition, the inhibitory power of these phenolic extracts against Protein Tyrosine Phosphatase 1B enzyme (PTP-1B), overexpressed in type-two diabetes, was investigated for the first time. Data highlighted a good correlation between total phenolic content and inhibitory power, with pinoresinol, p-coumaric acid and quercetin making the greater contributions.

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Source
http://dx.doi.org/10.1016/j.foodchem.2018.07.140DOI Listing

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