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KMID : 0613820180280111290
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Journal of Life Science
2018 Volume.28 No. 11 p.1290 ~ p.1300
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Changes in Glucosinolate Content of Dolsan Leaf Mustard Kimchi during Fermentation and Correlation with Antioxidant, Antihypertensive, and Antidiabetic Activities
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Oh Sun-Kyung
Kim Ki-Woong
Choi Myeong-Rak
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Abstract
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The glucosinolate content, antioxidant activity, and antihypertensive and antidiabetic activities were measured in a crude extract of Dolsan leaf mustard kimchi (DLMK). The glucosinolate content was low at 6.41 and 7.92 mg/g in leaves and stems of DLMK after 21 days of fermentation. The total polyphenol and total flavonoid contents were more than 2 times higher in the leaves (211.7 mg GAE/g, 158.8 mg QE/g) than in the stem (53.7 mg GAE/g, 85.2 mg QE/g) during the fermentation period. The 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) radical scavenging activity and electron donating ability (EDA) were similar to those of the control group after 14 days of fermentation, while the ferric reducing antioxidant power (FRAP) was higher in the leaves after 14 days of fermentation when compared to the control group. The angiotensin converting enzyme (ACE) inhibitory activity showed similar or higher inhibitory activity in the leaves when compared to the control group (0.01% captopril), and the α-glucosidase inhibitory activity was higher in the leaves and stems when compared to the control group (0.05% acarbose). The glucosinolate content and the ABTS, ACE, and α-glucosidase inhibitory activity were correlated, as determined by the observed straight line plot with a positive grade. During the fermentation period, the detected glucosinolates were sinigrin, glucobrasicin, glucotropeolin, and progoitrin. The DLMK extract is therefore expected to be valuable as a functional food because of its effective antioxidant, antihypertensive, and antidiabetic activities.
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KEYWORD
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ACE inhibition, antioxidant, Dolsan leaf mustard kimchi, α-glucosidase inhibition, glucosinolates
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