Abstract

꽃송이버섯 추출물은 염증반응 시 유도되는 NO 생성을 저해하는 활성이 있는 것으로 나타났으며, 200 <TEX>${\mu}g/ml$</TEX>의 꽃송이버섯 추출물을 처리하였을 때 NO 저해능이 최대 효과를 보였고 RAW264.7 cell에서는 대조군과 유사한 수준으로 NO 생성을 억제하였다. 이러한 NO 생성의 저해는 iNOS의 발현이 감소한 것에 의한 결과임을 단백질과 mRNA의 발현량 변화를 통하여 확인하였으며, mRNA 발현 변화는 iNOS 유전자의 전사를 담당하는 전사인자인 <TEX>$NF-{\kappa}B$</TEX>와 STAT-1의 활성감소에 의한 결과임을 western blot을 통하여 확인하였다. 특히, <TEX>$NF-{\kappa}B$</TEX>의 활성감소는 <TEX>$I{\kappa}B{\alpha}$</TEX>의 활성증가에 의한 <TEX>$NF-{\kappa}B$</TEX>의 억제능 향상에 의한 것임을 확인하였고, 활성억제된 <TEX>$NF-{\kappa}B$</TEX>가 핵 내부로의 이동이 저해되면서 iNOS 유전자 발현에 영향을 미친 것임을 확인하였다. 그러므로, 꽃송이버섯 추출물은 NO 저해능을 이용한 항염증소재로서 염증성질환의 완하에 도움이 될 것으로 사료된다. Sparassis crispa is a medicinal mushroom, which has been reported to have anti-cancer effect. In this study, we designed to investigate the effects of Sparassis crispa extracts on the production of nitric oxide (NO) in LPS-stimulated RAW264.7 cells. The pre-treatment of the extracts prior to add LPS in RAW264.7 cells suppressed NO production and iNOS expression at protein and mRNA levels. The phosphorylation of <TEX>$I{\kappa}B{\alpha}$</TEX> was inhibited by the extracts, which was induced through suppressing the activation of <TEX>$NF-{\kappa}B$</TEX>. Sparassis crispa extracts showed the effect on the down-regulation of STAT-1 activation in a dose-dependent manner. In LPS-stimulated RAW264.7 cells, <TEX>$NF-{\kappa}B$</TEX> was translocated into the nucleus, while the treatment of Sparassis crispa extracts induced to sequestered <TEX>$NF-{\kappa}B$</TEX> in the cytosol. These experimental results determined that Sparassis crispa extracts play a inhibitory role in inflammatory reactions via regulating NO production, which suggests potential as a component of inflammatory drugs.

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