Stracchino is a typical Italian soft cheese, widely consumed and appreciated for its flavour and freshness. With the aim to follow the release of health-promoting peptides, an in vitro gastro-intestinal digestion of Stracchino was carried out.The digest was fractionated by semipreparative RPLC and tested for its antioxidant properties in H2O2-treated intestinal epithelial cell line (IEC-6). The most active fraction was characterized by UHPLC-MS/MS, showing the presence of two abundant β-casein hexapeptides: EAMAPK (f: 115–120) and AVPYPQ (f: 192–197), which were synthesized and tested, showing antioxidant activities in a wide concentration range (5–150 g/mL), involving ROS reduction, SOD expression increase and Nrf2 antioxidant response activation. Hence, bioavailability studies were carried out through Caco-2 monolayers cells on the two hexapeptides, which revealed a significative concentration in the basolateral side. The results highlight the potential of Stracchino as health promoting food, and the possible employment of casein peptides in nutraceutical formulations.

Antioxidant peptides released from gastrointestinal digestion of “Stracchino” soft cheese: Characterization, in vitro intestinal protection and bioavailability

Sommella, Eduardo
Co-primo
;
Ostacolo, Carmine
Investigation
;
Novellino, Ettore;
2016

Abstract

Stracchino is a typical Italian soft cheese, widely consumed and appreciated for its flavour and freshness. With the aim to follow the release of health-promoting peptides, an in vitro gastro-intestinal digestion of Stracchino was carried out.The digest was fractionated by semipreparative RPLC and tested for its antioxidant properties in H2O2-treated intestinal epithelial cell line (IEC-6). The most active fraction was characterized by UHPLC-MS/MS, showing the presence of two abundant β-casein hexapeptides: EAMAPK (f: 115–120) and AVPYPQ (f: 192–197), which were synthesized and tested, showing antioxidant activities in a wide concentration range (5–150 g/mL), involving ROS reduction, SOD expression increase and Nrf2 antioxidant response activation. Hence, bioavailability studies were carried out through Caco-2 monolayers cells on the two hexapeptides, which revealed a significative concentration in the basolateral side. The results highlight the potential of Stracchino as health promoting food, and the possible employment of casein peptides in nutraceutical formulations.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/637939
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