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

Lorenzo Cecchi, Marzia Innocenti, Silvia Urciuoli, Marco Arlorio, Paolo Paoli, Nadia Mulinacci

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

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.

Lingua originaleInglese
pagine (da-a)380-387
Numero di pagine8
RivistaFood Chemistry
Volume271
DOI
Stato di pubblicazionePubblicato - 15 gen 2019

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