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KMID : 0380020120270060361
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Korean Journal of Biotechnology and Bioengineering
2012 Volume.27 No. 6 p.361 ~ p.366
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Antidiabetic Activity and Enzymatic Activity of Commercial Doenjang Certified for Traditional Foods
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Lee So-Young
Kim In-Sun
Park So-Lim
Lim Seong-Il
Choi Hye-Sun
Choi Shin-Yang
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Abstract
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We investigated the anti-diabetic activity and enzymatic activity of 24 commercial doenjang samples certified for traditional foods. Twenty four doenjang samples showed the wide ranges in enzymatic activities (protease activities 0-50.45 unit/g, α-amylase activities 0-675.9 unit/g, β-amylase 13.6-308.6 unit/g), and there were no difference in enzymatic activity by the producing region. To evaluate the potential anti-diabetic activity of 24 doenjang samples, we examined the effect of doenjang methanol extract (DME) on 2-[n-(7-nitrobenz-2-oxa-1, 3-diazol-4-yl) amyno]-2-deoxyd-glucose (2-NBDG) uptake. Ten samples among 24 samples significantly stimulated the uptake of 2-NBDG. When the cells were treated with DME at 400 ug/mL, No. 17 and 23 specially stimulated 2-NBDG uptake by 1.23-fold and 1.25-fold, respectively, compared with untreated control cell. And there were no cytotoxicity in the C2C12 cells treated with DME at concentration of 500 ug/mL. Among 24 samples, No. 6, 7, 12, 21 and 24 showed the α-glucosidase inhibitor activity at concentration of 10 mg/mL; however, they were less effective than acarbose which is a commercial α-glucosidase inhibitor.
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KEYWORD
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doenjang, enzyme activity, antidiabetic activity, 2-NBDG uptake, α-glucosidase inihibitor
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