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Hypoglycemic Effects of Crude Extracts of Moutan Radicis Cortex  

Park, Sun-Min (Food and Nutrition, Hoseo University)
Jun, Doug-Wha (Food and Nutrition, Hoseo University)
Park, Chun-Hee (Food and Nutrition, Hoseo University)
Jang, Jin-Sun (Food and Nutrition, Hoseo University)
Park, Seong-Kyu (College of Oriental Medicine, Kyung Hee University)
Ko, Byoung-Seob (Korea Institute of Oriental Medicine)
Kim, Bo-Jung (School of Medicine, Konkuk University)
Choi, Soo-Bong (School of Medicine, Konkuk University)
Publication Information
Korean Journal of Food Science and Technology / v.36, no.3, 2004 , pp. 472-477 More about this Journal
Abstract
Hypoglycemie effect of Moutan Radicis Cortex (MRC) extract contained in Yukmijihuang-hwan was determined by investigating insulin-sensitizing and ${\alpha}-glucoamylase-suppressing$ actions. MRC was extracted with 70% ethanol, fractionated by XAD-4 column chromatography with mixture solvent of methanol and water, and utilized for hypoglycemic effect assay. Significant insulin sensitizing activities of MRC extracts were observed in 3T3-L1 adipocytes, giving MRC extracts with 1 ng/mL insulin reach glucose uptake level increased by 50 ng/mL of insulin alone. MRC methanol extracts of 20, 40, 60, and 80% suppressed ${\alpha}-glucoamylase$ activity in vitro. Peak serum glucose levels and area under curve were lower in Sprague Dawley male rats treated with MRC ethanol extract than those treated with cellulose in oral glucose tolerance test using 2 g dextrin/kg body weight. These data suggest MRC extracts contain effective insulin -sensitizing and ${\alpha}-glucoamylase-suppressing$ compounds for hypoglycemic activity.
Keywords
3T3-L1 adipocytes; insulin sensitizer; ${\alpha}-glucoamylase$; Moutan Radicis; dextrin;
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