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Anti-inflammatory Effects of Ethanol Extract of Chinese Medicinal Plants in Yanjin on LPS-stimulated RAW 264.7 Macrophages

LPS로 자극한 RAW 264.7 세포에서 중국 연변에 자생하는 약용 식물 에탄올 추출물의 항염증 효과 연구

  • Park, Yea-Jin (Department of Pharmacology, College of Korean Medicine, Sangji University) ;
  • Seo, Jong-Hwan (Department of Pharmacology, College of Korean Medicine, Sangji University) ;
  • Gil, Tae-Young (Department of Pharmacology, College of Korean Medicine, Sangji University) ;
  • Cheon, Se-Yun (Department of Pharmacology, College of Korean Medicine, Sangji University) ;
  • Piao, Ren-Zhe (College of Agriculture, Yanbian University) ;
  • Lee, Sang-Woo (International Biological Material Research Center, Korea Research Institute of Bioscience and Biotechnology) ;
  • Cha, Yun-Yeop (Department of Rehabilitative Medicine of Korean Medicine and Neuropsychiatry, College of Korean Medicine, Sangji University) ;
  • An, Hyo-Jin (Department of Pharmacology, College of Korean Medicine, Sangji University)
  • 박예진 (상지대학교 한의과대학 약리학교실) ;
  • 서종환 (상지대학교 한의과대학 약리학교실) ;
  • 길태영 (상지대학교 한의과대학 약리학교실) ;
  • 천세윤 (상지대학교 한의과대학 약리학교실) ;
  • 박인철 (옌벤대학교 농과대학) ;
  • 이상우 (한국생명공학연구원 해외생물소재센터) ;
  • 차윤엽 (상지대학교 한의과대학 재활의학교실) ;
  • 안효진 (상지대학교 한의과대학 약리학교실)
  • Received : 2018.10.10
  • Accepted : 2018.11.25
  • Published : 2018.11.30

Abstract

Objectives : This study was fulfilled to investigate nominee materials as anti-inflammatory agent from ethanol extract of Chinese medicinal plants in Yanjin. Among the 20 candidates, we selected most effective one, the ethanol extract of Cicuta virosa L. (CVL). The mechanism underlying the anti-inflammatory effects of CVL is not clearly identified as yet. Accordingly, we clarified the anti-inflammatory effects of CVL and its underlying molecular mechanisms in LPS-stimulated RAW 264.7 macrophages. Methods : RAW264.7 macrophages were incubated with CVL (12.5, 25, or $50{\mu}M$) and/or lipopolysaccharide (LPS) ($1{\mu}g/m{\ell}$). Cytotoxicity was determined using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-tetrazolium bromide assay and the level of nitric oxide (NO) production was measured with Griess reagent. The prostaglandin $E_2$ ($PGE_2$) production was measured with enzyme immunoassay kits and the protein expression of inducible nitric oxide synthase (iNOS) was determined using Western blot analysis. Results : Among the 20 ethanol extract of Chinese medicinal plants of Yanjin tested, CVL significantly reduced the production of NO in a dose-dependent manner via inhibition the protein expressions of iNOS without cytotoxicity on the LPS-stimulated RAW 264.7 macrophages. In addition, CVL also effectively declined the production of $PGE_2$ in LPS-simulated RAW 264.7 macrophages. Conclusions : Taken together, these data presented in this study demonstrate that CVL possesses anti-inflammatory activity by suppressing the production of pro-inflammatory mediators NO and $PGE_2$, and pro-inflammatory protein iNOS expression in LPS-stimulated RAW 264.7 macrophages.

Keywords

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Figure 1. Effect of CVL on the viability of RAW 264.7 cells.

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Figure 2. Effect of CVL on production of NO in LPS-stimulated RAW 264.7 cells.

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Figure 3. Effect of CVL on production of PGE2 in LPS-stimulated RAW 264.7 cells.

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Figure 4. Effect of CVL on iNOS protein expression in LPS-stimulated RAW 264.7 cells.

Table 1. Effect of Ethanol extract of Chinese medicinal plants in Yanjin on the cell viability in RAW 264.7 macrophages.

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Table 2. Effect of Ethanol extract of Chinese medicinal plants in Yanjin on LPS-stimulated NO production level in RAW 264.7 macrophages.

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