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소태나무 잎 추출물의 항염증 효과

Anti-Inflammatory Effects of Picrasma Quassioides (D.DON) BENN Leaves Extracts

  • 정연섭 (계명대학교 식품가공학과) ;
  • 은청수 (계명대학교 식품가공학과) ;
  • 정영태 (계명대학교 식품가공학과) ;
  • 김현정 (계명대학교 전통미생물자원개발 및 산업화 연구(TMR)센터) ;
  • 유미희 (계명대학교 식품가공학과)
  • Jung, Yeon Seop (Department of Food Science and Technology, Keimyung University) ;
  • Eun, Cheong Su (Department of Food Science and Technology, Keimyung University) ;
  • Jung, Young Tae (Department of Food Science and Technology, Keimyung University) ;
  • Kim, Hyun Jeong (The Center for Traditional Microorganism Resurces, Keimyung University) ;
  • Yu, Mi Hee (Department of Food Science and Technology, Keimyung University)
  • 투고 : 2013.03.11
  • 심사 : 2013.05.27
  • 발행 : 2013.05.30

초록

본 연구에서는 쌍떡잎식물 쥐손이풀목 소태나무과에 속하는 소태나무 잎 methanol 추출물을 이용하여 항염증 및 항산화 활성을 확인해 보았다. 먼저, 소태나무 잎 methanol 추출의 항산화 활성을 알아보기 위해 폴리페놀, 플라보노이드 함량을 측정하였으며 그 결과, 소태나무 잎 추출물에서 폴리페놀과 플라보노이드의 함량은 각각 $367.52{\mu}g/mg$, $46.41{\mu}g/mg$으로 나타나 플라보노이드 보다는 다량의 폴리페놀을 함유하는 것을 확인하였다. 항염증 활성을 확인하기 위해 염증 매개물질인 NO와 염증성 cytokine인 $PGE_2$를 생성을 측정하였다. 소태나무 잎추출물을 LPS로 염증을 유도한 대식세포에 농도별로 처리한 결과 NO의 생성을 $100{\mu}g/ml$의 농도에서 80%까지 억제하는 것으로 나타났으며, 염증성 cytokine인 $PGE_2$의 생성을 $50{\mu}g/ml$, $100{\mu}g/ml$의 농도에서 각각 85%, 90%까지 생성을 억제하는 것으로 나타났다. 또한, 소태나무 잎 추출물이 염증반응과 관련된 iNOS, COX-2, p-NF-${\kappa}B$, p-$I{\kappa}B$의 단백질 발현에 미치는 영향을 확인한 결과, iNOS 단백질은 농도 유의적으로 그 발현이 감소하는 것을 확인하였으며, COX-2 단백질의 경우 12.5, 25, $50{\mu}g/ml$의 농도에서는 큰 변화 나타나지 않았지만 $100{\mu}g/ml$의 농도에서 그 발현이 크게 억제되는 것을 확인하였다. 또한 iNOS와 COX-2의 발현을 조절하는 NF-${\kappa}B$ signaling을 확인해 본 결과, $I{\kappa}B$와 NF-${\kappa}B$의 인산화를 효과적으로 감소시킴으로써 항염증 활성을 나타내는 것을 확인 할 수 있었다. 이상의 결과와 같이, 소태나무 잎 추출물은 항산화 활성과 우수한 항염증 활성을 나타내는 기능성 소재로의 활용이 가능할 것이라고 사료된다.

This study was performed to evaluate the anti-inflammatory and antioxidant activities of methanol extract from the leaves of Picrasma quassioides BENNET (PLME). The antioxidant effects of PLME were measured based on polyphenol and flavonoid contents. PLME was found to have $367.52{\mu}g/mg$ and $46.61{\mu}g/mg$ high polyphenol and flavonoid contents. Cell viability was determined by MTT assay. The production of nitric oxide (NO) and prostaglandin $E_2$ ($PGE_2$) was measured by Griess assay and enzyme-linked immunosorbent assay (ELISA). In order to effectively anti-inflammatory agents, we examined the inhibitory effects on the production of lipopolysaccharide (LPS)-induced NO and $PGE_2$ in RAW 264.7 cells. PLME significantly decreased the production of NO and $PGE_2$ in a dose-dependent manner, and also reduced the expression of iNOS, a COX-2 protein. In addition, PLME reduced the NF-${\kappa}B$, $I{\kappa}B$ phosphorylation in RAW 264.7 cells upon stimulation with LPS (100 ng/ml) for 24 h. These results provide evidence for the anti-inflammatory and antioxidant effects of Picrasma quassioides leaves.

키워드

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