Journal of Microbiology and Biotechnology

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Anti-Inflammatory Effects of Grasshopper Ketone from Sargassum fulvellum Ethanol Extract on Lipopolysaccharide-Induced Inflammatory Responses in RAW 264.7 Cells

  • Kim, Min-Ji (Department of Food Science and Technology and Institute of Food Science, Pukyong National University) ;
  • Jeong, So-Mi (Institute of Fisheries Sciences, Pukyong National University) ;
  • Kang, Bo-Kyeong (Department of Food Science and Technology and Institute of Food Science, Pukyong National University) ;
  • Kim, Koth-Bong-Woo-Ri (Institute of Fisheries Sciences, Pukyong National University) ;
  • Ahn, Dong-Hyun (Department of Food Science and Technology and Institute of Food Science, Pukyong National University)
  • Received : 2019.01.16
  • Accepted : 2019.04.09
  • Published : 2019.05.28
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Abstract

This study evaluated the anti-inflammatory potential of a grasshopper ketone (GK) isolated from the brown alga Sargassum fulvellum on lipopolysaccharide (LPS)-induced RAW 264.7 murine macrophage cell line. GK was isolated and purified from the n-hexane fraction and its structure was verified on the basis of NMR spectroscopic data. GK up to $100{\mu}g/ml$ is not cytotoxic to RAW 264.7, and is an effective inhibitor of LPS-induced NO production in RAW 264.7 cells. The production of pro-inflammatory cytokines, including IL-6, $IL-1{\beta}$, and $TNF-{\alpha}$ was found significantly reduced in $0.1-100{\mu}g/ml$ dose ranges of GK treatment (p < 0.05). We confirmed the dose-dependent and significant inhibition of iNOS and COX-2 proteins expression. In addition, it has been shown that GK induces anti-inflammatory effects by inhibiting MAPKs (ERK, JNK, and p38) and $NF-{\kappa}B$ p65 phosphorylation. Our results show that the anti-inflammatory properties of GK may be due to the inhibition of the $NF-{\kappa}B$ and MAPKs pathways, which are associated with the attenuation of cytokine secretion.

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References

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