Abstract
This study evaluated the antioxidative and anti-inflammatory effects of a low-molecular-weight hydrolysate derived from black goat extract using alcalase, ProteAX, and trypsin (APT6 < 3 kDa). The APT6 < 3 kDa exhibited high antioxidative activities with estimated contents of 41.24% for antioxidative amino acids and 49.55% for hydrophobic amino acids. APT6 < 3 kDa inhibited nitric oxide and prostaglandin E2 production in RAW 264.7 cells induced by lipopolysaccharide (p<0.05), which was accompanied by the inhibition of inducible nitric oxide synthase and cyclooxygenase-2 protein expression. Additionally, APT6 < 3 kDa downregulated the mRNA expression and production of TNF-α and IL-1β (p<0.05). Mechanistically, these anti-inflammatory effects of APT6 < 3 kDa were shown by downregulating the MAPK and NF-κB pathways in a dose-dependent manner. Overall, 43 peptides were isolated from a certain fraction (F5) of APT6 < 3 kDa, demonstrating high antioxidative and anti-inflammatory activities. These results suggest that identified peptides from APT6 < 3 kDa possess natural antioxidants and hold potential as anti-inflammatory agents.
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