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학술저널
저자정보
Seo, Kyung-Hye (Crop Foundation Division, NICS) Ra, Ji-Eun (Crop Foundation Division, NICS) Lee, Sung-Joon (Division of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University) Lee, Ji Hae (Division of Food Bioscience and Technology, College of Life Sciences and Biotechnology, Korea University) Kim, Sun Rim (Crop Foundation Division, NICS) Lee, Jin Hwan (National Institute of Chemical Safety, Ministry of Environment) Seo, Woo Duck (Crop Foundation Division, NICS)
저널정보
한국응용생명화학회 Applied Biological Chemistry Applied Biological Chemistry 제58권 제4호
발행연도
2015.1
수록면
571 - 579 (9page)

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The extracts and chemical compounds isolated from barnyard millet (Echinochloa utilis) grains were investigated as part of a search for naturally derived antihyperglycemic medicinal plants. Among the five different solvent extracts, the ethyl acetate extract showed the lowest $IC_{50}$ value against Saccharomyces cerevisiae ${\alpha}$-glucosidase ($70.2{\mu}g/mL$). Chromatography yielded eight phenolic compounds that may have been responsible for this effect. Among them, N-p-coumaroyl serotonin (1, CS), feruloyl serotonin (2, FS), and luteolin (5) potently inhibited ${\alpha}$-glucosidase with $IC_{50}$ values of $1.3-17.8{\mu}M$ compared with those of deoxynojirimycin (DNJ, $IC_{50}=2.5{\pm}0.1{\mu}M$) and acarbose ($IC_{50}=255.1{\pm}15.6{\mu}M$). Additionally, for the first time, we found that CS and FS were significantly inhibited mammalian rat intestinal sucrase ($IC_{50}$ of 3.0 and $8.2{\mu}M$) and reduced glucose content (73 and 52 % at 0.1 mg/wells) in Caco-2 (human intestinal epithelial) cells. Furthermore, oral glucose tolerance test revealed improved glucose tolerance following treatment with the barnyard millet grains extract by retarding the postprandial rise in blood glucose in vivo. These results suggest that barnyard millet grain can be used as a natural functional medicine to prevent and alleviate type-2 diabetes.

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