Antioxidant effects of Erigeron annuus extracts

Chae Jung Woo1*, Jo Hui Seon1, Lee Jin Young2, Lee Seung Jae3, Joo Sung Hyun4

1Gyeonggido Forest Environment Research Center, Osan 18118, South Korea

2Department of Herbal Cosmetics Science, Hoseo University, Asan 31499, South Korea

3Aroma Newtech Co., Asan 31532, South Korea.

4Department of Forestry, Kyungpook University, Daegu 41566, South Korea

Erigeron annuus (EA) is a biennial plant belonging to the Asteraceae family. It is a naturalized plant native of North America that entered the Republic of Korea in the 1900s. In Korea, EA is common to roads and off roads. In private sector, they also had eaten seaweed as herbs. In addition, it was used as a medicinal product of indigestion, colic and diarrhea treatment due to enteritis, infectious hepatitis, lymphadenitis, urinary hemorrhage, schizophrenia and hypoglycemia. The antioxidant capacity of EA extracts was verified to confirm its value as a functional cosmetic. Experiment sample was collected in the Mulhyanggi arboretum in june and august 2016, and extracted by 70% ethanol and hot water. After that, electron donating ability, ABTS radical scavenging activity and SOD-like activity was determinate. In all the experiments, if extract concentration increased, it increased activities. In electron donating experiment, electron donating ability of ethanol extracts is higher than hot water extracts. In the case of ethanol extracts, june-harvested extract showed higher activity than those of august-harvested extract. The hot water extracts showed the opposite. In ABTS experiment, ABTS radical scavenging activity of ethanol extracts is higher than hot-water extracts, and june-harvested extracts are higher than august-harvested extracts. As a result of SOD-like experiments, june-harvested ethanol extract was more active than august-harvested ethanol extract at high concentration (1000 ㎍/ml). The activity of june-harvested and august-harvested hot-water extracts were 13.89% and 16.27% at 1000 ㎍/ml concentration.

Key Word : Erigeron annuus, Anti-oxidant effect, Electron donating ability, SOD-like activity, ABTS radical scavenging activity