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KMID : 0380620070390050569
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Korean Journal of Food Science and Technology
2007 Volume.39 No. 5 p.569 ~ p.574
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Biological Activities of Hot Water Extracts from Euonymus alatus Leaf
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Kwon Gu-Joong
Choi Dae-Sung
Wang Myeong-Hyeon
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Abstract
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This study was performed to investigate the biological activities of roasted (RE) and non-roasted (NRE) hot water extract samples from Euonymus alatus leaf by measuring DPPH radical scavenging, total polyphenol content, hydroxyl radical scavenging, superoxide dismutase (SOD)-like activity, anti-inflammatory activity, and inhibitory effects on α-amylase and a-glucosidase in vitro. The IC50 values for DPPH free radical scavenging activity of the NRE and RE hot water extracts were 19.1μg/mL and 21.9μg/mL, respectively, and their total polyphenol contents were estimated as 9.6mg/g for NRE and 10.6mg/g for RE. Both NRE and RE scavenged the hydroxyl radical in a concentration-dependent manner, but their activities were lower than that of BHA. It was also shown that SOD-like activity was dependent on NRE and RE concentration, and the SOD-like activity of NRE was slightly higher than that of RE. The highest SOD-like activity obtained from NRE was 20% at a concentration of 3 mg/mL. Neither NRE nor RE seemed to have an effect on α-amylase and a-glucosidase inhibition. Finally, the hot water extracts of NRE and RE significantly decreased the concentration of LPS-induced NO in RAW 264.7 cells, indicating anti-inflammatory activity.
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KEYWORD
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Euonymus alatus, antioxidatant activity, nitric oxide, superoxide dismutase, α-amylase
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