Charge properties of peptides derived from casein affect their bioavailability and cytoprotection against H2O2-induced oxidative stress
文献类型: 外文期刊
第一作者: Wang, Bo
作者: Wang, Bo;Li, Bo;Xie, Ningning;Li, Bo
作者机构:
关键词: casein;charge property;antioxidative peptide;bioavailability;HepG-2 cells
期刊名称:JOURNAL OF DAIRY SCIENCE ( 影响因子:4.034; 五年影响因子:4.354 )
ISSN:
年卷期:
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收录情况: SCI
摘要: The effects of charge properties of casein peptides on absorption stability, antioxidant activity, and cytoprotection were evaluated. Alcalase hydrolysates of casein were separated into 4 fractions by cation-exchange chromatography according to charge properties. After simulated digestion and Caco-2 cell transmembrane transport, we determined the total antioxidant capacity (Trolox equivalent antioxidative capacity and oxygen radical antioxidant activity) and nitrogen content of peptide fractions to estimate available antioxidant efficacy and bioavailability (BA) of peptides. Results showed that negatively charged peptide fractions had greater BA and antioxidant activities after digestion and absorption. The peptide permeates were used to test the cytoprotective effect against H2O2-induced oxidative damage in HepG-2 cells. All peptide permeates increased cell viability, elevated catalase activity, and decreased superoxide dismutase activity. However, negatively charged peptide fractions preserved cell viability to a greater degree. Therefore, the negatively charged peptides from casein may be potential antioxidants and could be used as ingredients in functional foods and dietary supplements.
分类号: TS252
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