In vitro antioxidant properties of digests of hydrolyzed casein and caseinophosphopeptide preparations in cell models of human intestine and osteoblasts

Michela Bottani, Stefano Cattaneo, Valentina Pica, Milda Stuknytė, Ivano De Noni, Anita Ferraretto

Research output: Contribution to journalArticlepeer-review

Abstract

Three commercial samples consisting of enriched calcium-free caseinophosphopeptides (CPP), enriched calcium-bound caseinophosphopeptides (Ca-CPP) and an enzymatically hydrolyzed casein (hCN) were in vitro digested according to COST-Infogest protocol. As assessed by UPLC-HR-MS/MS, the digests contained 207–235 unique caseinophosphopeptides, and the species presenting the cluster sssEE were more abundant in CPP digest. The antioxidant activity at three different doses of each digest was firstly evaluated on human intestinal Caco-2/HT-29 70/30 co-culture. In presence of AAPH, hCN and CPP digests displayed a dose-dependent antioxidant activity equal or even greater than Vitamin C. In presence of Fe2+, the digests exerted an antioxidant activity mainly at the highest dose. Antioxidant activities of the intestinal metabolized digests was then evaluated on human osteoblast (Saos-2) cells. The digests exerted an antioxidant activity in presence of AAPH, but not in presence of Fe2+. These results highlight milk-derived peptides as potential dietary supplements for gut and bone health.

Original languageEnglish
Article number103673
JournalJournal of Functional Foods
DOIs
Publication statusAccepted/In press - Jan 1 2019

Keywords

  • Antioxidant activity
  • Caco-2/HT-29 co-culture
  • Caseinophosphopeptides
  • Gastrointestinal digestion
  • Osteoblast-like cells Saos-2
  • ROS

ASJC Scopus subject areas

  • Food Science
  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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