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논문 상세정보

청각추출물의 항산화 및 일산화질소 합성 저해 연구

Studies on Antioxidant Activity and Inhibition of Nitric Oxide Synthesis from Codium fragile

초록

청각은 녹조류로서 김치의 부재료로 널리 사용되는 것으로 청각 추출물이 젖산균의 생육 및 cellulase 활성에 미치는 영향과 항산화 및 면역기능에 미치는 영향을 조사하였다. 청각추출물이 젖산균의 생육에 미치는 영향은 김치의 중기이후 젖산 생성에 중요한 Lactobacillus plantarum KCTC 3105의 생육을 2배정도 촉진하였으며 과숙 김치의 경도유지에 중요한 cellulase의 활성을 약 60% 정도 저해하는 효과를 보였다. 청각추출물의 항산화력은 DPPH 방법이나 SOD 유사활성등에서 비슷한 항산화력을 나타내고 있으며 특히 ethyl acetate 층에서 높은 항산화력을 나타내었는데 이러한 결과는 청각에 존재한 phenolic compound가 관여하는 것으로 생각된다. 청각추출물의 항염증효과는 RAW264.7 세포에서 조사되었는데 특히 치주질환균에서 유도된 LPS를 처리하여 유도된 NO 활성을 현저히 감소시킴으로서 높은 항염증 효과를 나타내었으며 이러한 결과는 iNOS 활성에서도 유사한 결과를 나타내었다.

Abstract

This study was carried out to investigate the biological effects from Codium fragile. Methanol extract of Codium fragile increased two times at 2500 ㎍/ml the growth of Lactobacillus plantarum that associated with probiotic properties of lactic acid bacteria of Kimchi. Ethyl acetate extract of Codium fragile inhibited the cellulase activity up to approximately 60% at $2500\;{\mu}g/ml$. Methanol extract of Codium fragile was fractionated into several subfractions and their antioxidant activities were measured by using DPPH radical scavenging and SOD-like activity. Especially the antioxidative activity of ethyl acetate fraction was shown higher than that of other fractions and its fraction showed higher contents of total phenolic compounds, indicating the positive relationship between DPPH radical scavenging effect and total polyphenol content. Stimulation of the macrophages RAW264.7 cells with lipopolysaccharide (LPS) resulted in increased production of nitric oxide (NO) in the medium. However, the methanol extract of Codium fragile showed marked inhibition of NO synthesis in a dose-dependent manner. This result suggest that Codium fragile plays significant role for activation of immune system in the pathogenesis of inflammatory diseases.

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