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• W2108153886 abstract "각종 염증성 질환 및 패혈증으로 인한 치명적인 저혈압을 예방치료하는 약물 개발을 위한 기초 연구로서 유도성 NOS (inducible nitric oxide synthase, iNOS) 에 의한 NO의 과다 생성을 저해하는 성분을 천연물로부터 찾아내고자 본 연구를 수행하였다. NO 생성 저해활성의 검정은 대식세포주인 RAW 264.7 세포를 LPS로 활성화한 후, 유도되는 iNOS에 의해 생성되는 NO를 Griess 시약을 이용해 <TEX>$NO_2{^-}$</TEX>의 형태로 정량하였다. 또한 Western blot 실험 및 RT-PCR 실험을 시행하여 iNOS의 mRNA의 발현 및 단백 합성에 대한 영향을 조사하였다. 고량강(Alpinia officinarum Hance, Zingiberaceae)의 메탄올 추출물로부터 극성에 따른 용매 분획을 시행하여 활성성분을 분리하고 분광학적 분석법을 이용하여 분리한 단일성분이 flavonol 구조인 3,5,7-trihydroxy-2-phenylchromen-4-one (galangin, GLG)임을 확인하였다. 작용기전을 알아보기 위해, Western blot 및 RT-PCR 실험결과, 분리한 flavonol 성분(GLG)의 NO 생성저해 활성은 iNOS mRNA발현을 저해하여 iNOS 효소 단백질의 생성이 억제됨에 기인하는 것으로 확인하였다. 따라서, 고량강 추출물로부터 분리한 flavonol 화합물(GLG)이 iNOS 발현의 억제를 통해 다량의 NO 생산을 저해함으로써, 고량강(Alpinia officinarum)의 NO 과량생성과 관련된 염증성 질환에 대한 응용 가능성이 클 것으로 기대된다. In a screen for plant-derived inhibitors of nitric oxide (NO) production in lipopolysaccharide (LPS)-activated RAW 264.7 macrophage cells, a flavonol isolated from the chloroform extract of Alpinia officinarum was isolated. The structure of the flavonol was found to be 3,5,7-trihydroxy-2-phenylchromen-4-one (galangin, GLG) by using spectroscopy. GLG exhibited an inhibitory effect (<TEX>$IC_{50}$</TEX> value: <TEX>$26.8{mu}M$</TEX>) on NO production in LPS-stimulated RAW 264.7 murine macrophage cells. Moreover, GLG suppressed expressions of inducible nitric oxide synthase (iNOS) protein and mRNA in a dose-dependent manner." @default.
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• W2108153886 creator A5034915619 @default.
• W2108153886 date "2014-08-31" @default.
• W2108153886 modified "2023-09-25" @default.
• W2108153886 title "Inhibitory Effect of Galangin from Alpinia officinarum on Lipopolysaccharide-induced Nitric Oxide Synthesis in RAW 264.7 macrophages" @default.
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• W2108153886 doi "https://doi.org/10.9721/kjfst.2014.46.4.511" @default.
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