Abstract

본 연구에서는 담쟁이덩굴 추출물이 항산화, 항당뇨 및 항염증 효과에 미치는 영향을 조사하고자 수행하였다. 담쟁이덩굴 열수 및 에탄올 추출물의 총 페놀함량은 각각 61.5 mg TAE/g과 122.1 mg TAE/g으로 에탄올 추출물에서 훨씬 높게 나타났다. 에탄올 추출물과 부탄올 분획물의 DPPH 라디칼 소거활성은 1 mg/ml에서 95%와 92%의 radical 소거능을 나타내어 positive control로 사용한 비타민 C와 유사한 항산화력을 보였다. SOD 활성은 에탄올 추출물과 부탄올 분획물 1 mg/ml 농도에서 91%, 97%로 높은 활성을 나타내었다. DPPH radical 소거능과 SOD 활성을 측정한 결과 항산화 활성은 모두 농도 의존적으로 증가하였으며 특히 열수추출물과 비교할 때 에탄올 추출물과 부탄올 분획물에서 높은 항산화 효과를 보였다. 담쟁이덩굴 추출물의 <TEX>${\alpha}$</TEX>-glucosidase 활성억제 효과는 에탄올 추출물과 핵산 및 부탄올 분획층에서 높은 항당뇨 효과를 나타내었다. 이러한 결과는 지금까지 항당뇨 약물로 사용된 것보다도 높은 것으로 나타났다. LPS에 의하여 유도된 NO 합성은 1 mg/ml 농도의 담쟁이추출물을 처리함으로써 NO 합성이 약 40%로 감소하였다. 이러한 결과들은 담쟁이 추출물의 우수한 항산화, 항당뇨, 항염 효과를 시사하고 있으며 특히, 천연 항당뇨 기능성 소재로서 담쟁이 추출물의 활용 가능성이 높을 것으로 사료된다. This study was carried out to analyze the effects on antioxidative, antidiabetic, and anti-inflammatory activities of Parthenocissus tricuspidata (PT) stem extracts. The total phenolic contents of hot water and ethanol extracts from PT stems were 61.5 mg TAE/g and 122.1 mg TAE/g, respectively. The antioxidative activities of hot water and ethanol extracts from PT stem were measured by using 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity and superoxide dismutase (SOD) assay. The DPPH radical scavenging activities of ethanol extract and butanol fraction were approximately 95% and 92% at 1 mg/ml, respectively, and the SOD activities of ethanol extract and butanol fraction were about 91% and 97% at 1 mg/ml, respectively. The DPPH radical scavenging and SOD activities of ethanol extract and butanol fraction from PT stem increased remarkably increased in a dose-dependent manner and were higher than in the hot water extracts. Compared to the acarbose, a known anti-diabetic drug, which was used as a positive control, the <TEX>${\alpha}$</TEX>-glucosidase inhibitory capacity of PT stem showed a strong inhibitory rate in ethanol extract and in butanol and hexane fractions. We investigated the effect of hot water extract from PT stem on lipopolysaccharide (LPS)-induced nitric oxide (NO) production in RAW 264.7 cells. Hot water extract from PT stem inhibited LPS-induced NO production up to 40% at a treatment of 1 mg/ml. These results suggest that PT stem extracts have an effect on antioxidative, antidiabetic, and anti-inflammatory activities and thus have great potential as antidiabetic materials and a source for natural health products.

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