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Screening of $\alpha$-amylase and $\alpha$-glucosidase Inhibitors from Brazilian Plant Extracts for Treatment of Rumen Acidosis  

Kim, Mi-Sun (Department of Food & Nutrition, Andong National University)
An, Seon-Mi (Department of Food & Nutrition, Andong National University)
Jung, In-Chang (Department of Food & Nutrition, Andong National University)
Kwon, Gi-Seok (School of Bioresource Science, Andong National University)
Sohn, Ho-Yong (Department of Food & Nutrition, Andong National University)
Publication Information
Food Science and Preservation / v.17, no.2, 2010 , pp. 290-296 More about this Journal
Abstract
To develop anti-acidosis and anti-diabetes agentsfrom natural products, the inhibitory activities of Brazilian plant extracts against microbial $\alpha$-amylase and $\alpha$-glucosidase were evaluated. Among 100 different ethanol extracts tested, those of Acacia jurema Mart., Anacardium humile A. St.-Hil., Cedrela odorata L., and Guazuma ulmifolia Lam showed good inhibitoryactivities toward both enzymes. In addition, an extract of Plumeria drastica Mart. showed specific inhibition of $\alpha$-amylase, whereas that of Eugenia uniflora L. demonstrated strong inhibition of the enzyme. IC50 values of $\alpha$-amylase inhibition suggested that the extract of A. humile A. St.-Hil., which has been used as an anti-diabetes medicine in Brazil, had potent inhibitory activity. The IC50 for the A. humile A. St.-Hil. extract ($91.2{\mu}g/mL$) was similar to that of acarbose ($50.5{\mu}g/mL$). This activity of A. humile A. St.-Hil. was not reduced by heat or acid treatment. Moreover, treatment with HCl (0.01 M) for 1 h increased the inhibitory activity from 57.5% to 81.2%. Also, the extract did not cause hemolysis of human red blood cells at levels up to 1 mg/mL. The results indicate that the extract of A. humile A. St.-Hil. is potentially useful as an anti-acidosis and anti-diabetes agent.
Keywords
Anacardium humile A. St.-Hil. Brazilian plant extract; $\alpha$-amylase inhibitor; $\alpha$-glucosidase inhibitor;
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