Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Anti-inflammatory Effect of the Robinia pseudoacacia L. High Temperature Extract

아까시 나무 고온추출물의 항염증 효과

  • Received : 2018.04.05
  • Accepted : 2018.07.14
  • Published : 2018.08.31
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Abstract

This study was conducted to compare anti-inflammatory effect of Robinia pseudoacacia L. using different extraction methods (water extraction, ethanol extraction and high temperature extraction). We investigated anti-inflammatory effect of Robinia pseudoacacia L. extract (RP1, water extract; RP2, ethanol extract; RP3, high temperature extract) on lipopolysaccharide (LPS)-stimulated inflammation using Raw 264.7 cell. Cells were treated with various concentrations (12.5, 25, 50, 100 or $200{\mu}g/m{\ell}$) of water extract, ethanol extract and high temperature extract. Cytotoxicity was not observed on Raw 264.7 cells, LPS-stimulated production of NO (nitric oxide), $PGE_2$ (prostaglandin $E_2$) and cytokines ($TNF-{\alpha}$, IL-6 and $IL-1{\beta}$) was reduced by RP3 treatment more than RP1 and RP2. In conclusion, these results indicated that inflammation on Raw 264.7 cells was improved by RP3. Treatment of RP3 could be used to natural medicine for improving inflammatory response. However, further experiment is required to observe how the high temperature extraction at $500^{\circ}C$ for 48 h influences on alteration of active ingredient in Robinia pseudoacacia L., and conducts the inflammation signal pathway on Raw 264.7 cells.

본 연구는 아까시나무의 물 추출물, 에탄올 추출물 및 고온 추출물을 이용하여 마우스 대식세포주인 Raw 264.7 세포에 대해 염증억제 효과가 있는지 알아보고자 수행하였다. RP1(아까시 나무 물 추출물), RP2(아까시 나무 에탄올 추출물) 및 RP3(아까시 나무 고온 추출물)은 세포생존율 분석에서 $200{\mu}g/m{\ell}$의 농도까지 Raw 264.7 세포에 세포독성을 나타나지 않았다. NO 생성 억제효과를 분석하였을 때 LPS 처리군과 비교하여 RP3는 약 87% 정도의 억제효과를 나타내 RP1과 RP2에 비해 NO 억제활성이 가장 높았다. 뿐만 아니라 RP3는 RP1과 RP2와 비교하여 염증매개인자의 억제율이 각각 $PGE_2$ (86.3%), $TNF-{\alpha}$ (64.1%), IL-6 (65.1%) 및 $IL-1{\beta}$ (63.3%)로 가장 높았다. 이는 RP3의 처리가 LPS에 의해 증가된 염증매개인자의 분비를 억제함을 통해 항염증 효과가 있을 것으로 생각되며, 염증관련 신호전달경로에 직접적으로 작용할 가능성이 있는 것으로 판단된다. 하지만 Raw 264.7 세포주는 염증조절복합체를 구성하는 ASC 단백질이 발현되지 않아 다른 신호전달 경로를 통해 염증매개인자를 분비하기 때문에, 설치류의 대식세포를 직접 일차배양(primary culture)하여 이에 관련된 신호전달경로를 확인하는 추가 실험이 필요하다고 사료된다.

Keywords

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