Melatonin, melatonin isomers and stilbenes in Italian traditional grape products and their antiradical capacity
Articolo
Data di Pubblicazione:
2013
Citazione:
Melatonin, melatonin isomers and stilbenes in Italian traditional grape products and their antiradical capacity / S. Vitalini, C. Gardana, P. Simonetti, G. Fico, M. Iriti. - In: JOURNAL OF PINEAL RESEARCH. - ISSN 0742-3098. - 54:3(2013 Apr), pp. 322-333. [10.1111/jpi.12028]
Abstract:
Though polyphenols represent the paradigm of the health-promoting effects ascribed to grape products, recently, attention has been paid to
dietary melatonin, significantly present in Mediterranean foods. In this
work, we measured melatonin, its isomers, stilbenes (trans- and cisresveratrol and their glucosides, piceids) and total polyphenols in some
different grape products (red, white and dessert wines, grape juices and
Modena balsamic vinegars) of distinct Italian areas. We also evaluated their antiradical activity by DPPH· and ABTS·+ assays. For indoleamine analysis, the separation was carried out on a 1.7 μm C18 BEH column and
the detection performed by means of mass spectrometry with electrospray
ionization in positive ion mode with multiple reaction monitoring. The
confirmation of the peak identity was accomplished by injection into the
high-resolution system (Orbitrap) using accurate mass measurements(error below 1.0 ppm). Mass spectrometry analyses revealed, for the first time, the presence of melatonin in dessert wines and balsamic vinegars, as well as the occurrence of three different melatonin isomers in grape products.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
melatonin isomers; wine; antioxidant activity; Modena balsamic vinegar; grape juice; stilbenes; polyphenols; traditional Mediterranean diet
Elenco autori:
S. Vitalini, C. Gardana, P. Simonetti, G. Fico, M. Iriti
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