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KMID : 0380620190510050480
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Korean Journal of Food Science and Technology
2019 Volume.51 No. 5 p.480 ~ p.485
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Comparison of antioxidant capacity of protein hydrolysates from 4 different edible insects
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Jang Hyun-Young
Park Chae-Eun
Lee Seung-Ook
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Abstract
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The present study was conducted to compare antioxidant capacities of protein hydrolysates from four different edible insects (Protaetia brevitarsis larvae, Allomyrina dichotoma larvae, Gryllus bimaculatus imago, and Tenebrio molitor larvae) which have recently been registered as food varieties in Korea. Protein hydrolysates were prepared from each insect using enzymatic hydrolysis using alcalase, and were then separated into a fraction containing ≤3 kDa. According to RC50 values and trolox equivalent antioxidant capacity results obtained from five different antioxidant analyses, the Gryllus bimaculatus (GB) hydrolysate showed relatively high levels of antioxidant capacity and, in particular, the GB hydrolysate showed considerably strong antioxidant activities in 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging and in ferric reducing antioxidant power (FRAP) assays. The GB hydrolysate also showed the strongest inhibitory effect on peroxidation of linoleic acid, and its rate of inhibition at 100 μg/mL on day 3 of treatment was 60.26%. These results suggest that protein hydrolysates from edible insects including GB represent potential sources of natural antioxidants.
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KEYWORD
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edible insects, protein hydrolysates, Gryllus bimaculatus, antioxidant, alcalase
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