Characterization, bioavailability and protective effects of phenolic-rich extracts from almond hulls against pro-oxidant induced toxicity in Caco-2 cells. (30th August 2020)

• Record Type: Journal Article
• Authors: An, Jun; Liu, Juer; Liang, Yuying; Ma, Yiwei; Chen, Chi; Cheng, Yanling; Peng, Peng; Zhou, Nan; Zhang, Renchuan; Addy, Min; Chen, Paul; Liu, Yuhuan; Huang, Guangwei; Ren, Difeng; Ruan, Roger
• Is Part Of: Food chemistry. Volume 322(2020)
• Publication Date: 2020-08-30
• Subjects: Almond hulls -- Phenolic-rich extracts -- Characterization -- Antioxidant activity -- Bioavailability; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2020.126742
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: The phenolic-rich extracts from almond hulls (PEAH) were prepared. The phenolic composition of PEAH with high antioxidant power was characterized. The protective effects of PEAH on oxidative stressed Caco-2 cells were evaluated. The bioavailability of PEAH after digestion in vitro was analyzed. 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.