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Effect of Gastrointestinal Protease Digestion on Bioactivity of Marine Peptides

Journal of Agricultural Science and Technology(B) 2014年第1期4卷 74-84页

作者： Ida-Johanne Jensen Lisa Lystbek Andersen Carlo Gunnar Ossum Greta Jakobsen Cristian De Gobba Sabeena Farvin Koduvayur Habeebullah Inez Johansson Else Hoffmann Edel Oddny Elvevoll Flemming Jessen Henrik Hauch Nielsen Faculty of Bioscience Fisheries and Economics Norwegian College of FisheO Science UniversiO of Tromso Tromso 9037Norway Division ofIndustrial Food Research National Food Institute DTU-Food Technical University qf Denmark Lyngby DK-2800Denmark Department of Biology Cell and Developmental Biology Universitv of Copenhagen Copenhagen 2100 Denmark marinova aps Adelvej 11 Lem St. 6940 Denmark Department of Food Science University o[Copenhagen Frederiksberg C 1958 Denmark

Focus in nutritional science has turned towards components in, or added to, foods that may possess health beneficial activities beyond the classical nutritional value, namely functional food. Bioactive peptides are examples of such components. In vitro studies on bioactivities have mainly been executed without concerning subsequent digestion after intake and the aim of this work was hence to investigate how the in vitro antioxidative, antihypertensive and caspase activating activities of peptides are affected by digestion with gastrointestinal （GI） proteases. Five different fish protein hydrolysates were chosen to study the effect of in vitro digestion on bioactivity. The protein concentration decreased in all samples during digestion and the molecular weight distribution of the peptides shifted towards lower values. Thus, in vitro digestion with GI proteases resulted in a further degradation of the peptides obtained by hydrolysis. The antihypertensive effect increased in all samples after digestion with GI proteases whereas the antioxidative capacity decreased. The effect on the caspase activity depended on the proteases used in the preparation of hydrolysates. In conclusion, the caspase activity and antihypertensive activity are maintained during digestion with GI proteases, while the antioxidative capacity seems to be reduced.

关键词： Antioxidative ACE in vitro caspase bioactivity marine peptides.

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