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Biological Activities of Hot Water Extracts from Euonymus alatus Leaf  

Kwon, Gu-Joong (School of Biotechnology, Kangwon National University)
Choi, Dae-Sung (Jeongseon Agricultural Technology & Extension Center)
Wang, Myeong-Hyeon (School of Biotechnology, Kangwon National University)
Publication Information
Korean Journal of Food Science and Technology / v.39, no.5, 2007 , pp. 569-574 More about this Journal
Abstract
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 ${\alpha}-amylase$ and ${\alpha}-glucosidase$ in vitro. The $IC_{50}$ values fur DPPH free radical scavenging activity of the NRE and RE hot water extracts were $19.1{\mu}g/mL$ and $21.9{\mu}g/mL$, respectively, and their total polyphenol contents were estimated as 9.6 mg/g for NRE and 10.6 mg/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 ${\alpha}-amylase$ and ${\alpha}-glucosidase$ 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.
Keywords
Euonymus alatus; antioxidatant activity; nitric oxide; superoxide dismutase; ${\alpha}-amylase$;
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