약쑥(Artemisia princeps Pamp)의 항산화작용 = Antioxidative Properties of Artemisia princeps Pamp

국문 초록 (Abstract)

본 연구는 약쑥(Artemisia princeps Pamp) 추출물의 항산화 효능을 조사하고자, 약쑥 분획물을 이용하여 총 폴리페놀 및 플라보노이드 함량, 활성산소종 소거능 및 간 microsome을 이용한 지질과산화 억제효과 등을 관찰하였다. 약쑥의 폴리페놀 함량 및 플라보노이드 함량은 EtOAc층에서 각각 $311.35{\mu}g/mg$ 및 $92.73{\mu}g/mg$으로 가장 높게 나타났다. DPPH radical 소거능은 EtOAc층의 $IC_{50}$이 $52.71{\mu}g/mg$으로 분획물 중에서 가장 높은 소거능을 보였다. Superoxideanion의 소거능은 EtOAc층의 $IC_{50}$은 $26.47{\mu}g/mg$으로, 합성항산화제인 BHA($IC_{50}:\;49.78{\mu}g/mg)$ 보다 항산화 효과가 우수한 것으로 나타났다. Hydrogen peroxide 소거능은 n-BuOH층의 $IC_{50}$이 $166.44{\mu}g/mg$으로, BHA의 소거활성보다 유의적(p<0.05)으로 높음을 알 수 있었다. Hydroxyl 라디칼 소거능도 EtOAc층의 $IC_{50}$값이 $58.92{\mu}g/mg$으로, BHA($IC_{50}:\;80.85{\mu}g/mg)$보다 유의적(p<0.05)으로 높았다. NO 소거능은 EtOAc층의 $IC_{50}$이 $65.94{\mu}g/mg$으로, BHA와 유의적인 차이가 없었다. 간 microsome에서의 지질과산화 억제효과도 EtOAc층이 분획물 중에서 가장 우수하였다. 이상의 결과로부터 약쑥 분획물의 EtOAc층이 총 폴리페놀 및 플라보노이드 함량이 높음을 알 수 있었으며, 이에 따른 활성산소종 소거능 및 간 microsome을 이용한 지질과산화 억제효과도 관찰할 수 있었다.

다국어 초록 (Multilingual Abstract)

Antioxidant properties of Artemisia princeps Pamp were determined using in vitro assay systems against 1,1-diphenyl-picrylhydrazyl (DPPH) radical, superoxide ($O_2{^-}$), hydrogen peroxide ($H_2O_2$), hydroxyl radical ($HO{\cdot}$) and nitric oxide (NO) radical, as well as rat liver microsomal lipid peroxidation. Among the five solvent fractions, ethyl acetate fractions showed the highest total polyphenol and flavonoid contents at $311.35{\mu}g/mg\;and\;92.73{\mu}g/mg$, respectively. Ethyl acetate fractions, except for $H_2O_2$ scavenging activity, also showed the highest scavenging activity; the 50% inhibitory concentration ($IC_{50},\;{\mu}g/mg$) values for DPPH, superoxide, $HO{\cdot}$ and NO radical scavenging were 52.71, 26.47, 58.92 and 65.94, respectively. Additionally, the highest inhibition of rat liver microsomal lipid peroxidation was observed by ethyl a cetate fraction.

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