Characterization, bioavailability and protective effects of phenolic-rich extracts from almond hulls against pro-oxidant induced toxicity in Caco-2 cells

Jun An, Juer Liu, Yuying Liang, Yiwei Ma, Chi Chen, Yanling Cheng, Peng Peng, Nan Zhou, Renchuan Zhang, Min Addy, Paul Chen, Yuhuan Liu, Guangwei Huang, Difeng Ren, Roger Ruan

Research output: Contribution to journalArticle

Abstract

Almond hulls, the main by-product of almond production, are considered a valuable source of bioactive phenolic compounds. This study aimed to characterize the phenolic composition, bioavailability of the phenolic-rich extracts from almond hulls (PEAH), and their protective effect on oxidative stressed Caco-2 cells induced by tert-butylhydroperoxide (t-BOOH). The ultra-performance liquid chromatography–tandem mass spectrometry (UPLC–MS) analysis detected 11 phenolic compounds in the PEAH with high total phenolic content and antioxidant activity. Oxidative Caco-2 cell damage was reduced by PEAH, especially at 5 μg/mL, through scavenging reactive oxygen species (ROS), modulating the cellular endogenous antioxidant system and cell redox at a predictable status. Also, in vitro digestion influenced the phenolic compounds’ composition and antioxidant power of PEAH. These results suggested that almond hulls, rich in phenolic compounds, can meliorate the oxidative stressed Caco-2 cells and restore its impaired redox balance, and ultimately improve health benefits.

Original languageEnglish (US)
Article number126742
JournalFood Chemistry
Volume322
DOIs
StatePublished - Aug 30 2020

Keywords

  • Almond hulls
  • Antioxidant activity
  • Bioavailability
  • Characterization
  • Phenolic-rich extracts

PubMed: MeSH publication types

  • Journal Article

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