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  • Title: Anti-fatigue and anti-oxidant activities of oyster (Ostrea rivularis) hydrolysate prepared by compound protease.
    Author: Miao J, Liao W, Kang M, Jia Y, Wang Q, Duan S, Xiao S, Cao Y, Ji H.
    Journal: Food Funct; 2018 Dec 13; 9(12):6577-6585. PubMed ID: 30488053.
    Abstract:
    Oyster, which is rich in protein and widely used as a marine traditional Chinese medicine, was believed to have good curative effects in health care and on chronic diseases. This study was designed to evaluate the anti-fatigue and anti-oxidant effects of oyster hydrolysate. Oyster meat (OM) was hydrolyzed with a complex protease, and oyster hydrolysate (OH) was separated by a 6 kDa ultrafiltration membrane into two fractions, OH-I (<6 kDa) and OH-II (≥6 kDa). The anti-fatigue effects of OM, OH, OH-I and OH-II groups were first investigated, and then the antioxidant activities of OH-I and OH-II were further analyzed. Anti-fatigue experimental results showed that OH-I displayed the strongest activity among the four groups. Compared to the control group, OH-I significantly prolonged swimming time (67.79%), increased the content of muscle glycogen (45.65%) and liver glycogen (49.01%), and reduced the content of blood urea nitrogen (BUN) (18.44%) (P < 0.05). Meanwhile, OH-I showed excellent chemical and cellular antioxidant activities, especially when the concentration increased; its antioxidant activity was significantly better than that of OH-II (P < 0.05). Results of an amino acid analysis showed that OH-I was rich in branched-chain amino acids (10.84 g per 100 g), Glu (8.63 g per 100 g), Tau (1.68 g per 100 g), Asp (5.02 g per 100 g) and Arg (3.61 g per 100 g), which were expected to contribute to its antioxidant and anti-fatigue activities.
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