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http://dx.doi.org/10.14480/JM.2016.14.4.220

Anti-inflammatory properties of chloroform extracts from GW10-45, a new cultivar derived from Pleurotus ferulae, in RAW264.7 murine macrophages.  

Choi, Hyung-Wook (Department of Microbiology, Pukyong National University)
Kim, Eun-Joo (Department of Microbiology, Pukyong National University)
Kim, Keun-Ki (Department of Life Science and Environmental Biochemistry, Pusan National University)
Shin, Pyung-Gyun (Mushroom Research Division, National Institute of Horticulture & Herbal Science, Rural Development Administration)
Kim, Gun-Do (Department of Microbiology, Pukyong National University)
Publication Information
Journal of Mushroom / v.14, no.4, 2016 , pp. 220-224 More about this Journal
Abstract
Chronic inflammation, which results from continuous exposure to antigens, is one of major reasons for tissue damage and diseases such as rheumatoid arthritis and type 2 diabetes. In this study, we investigated the anti-inflammatory effects of extracts (hexane, $CHCl_3$, MeOH, $MeOH/H_2O$, and $H_2O$) from GW10-45, which is our new cultivar of an edible mushroom Pleurotus ferulae (ASI 2803 and ASI 2778), in RAW264.7 murine macrophages. None of the extracts showed cytotoxicity in RAW264.7 cells and the hexane, CHCl and H extracts reduced nitric oxide (NO) production, an important inflammatory marker, in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. Particularly, the extract (CG45) inhibited NO production more than the other extracts did. To elucidate the effects of CG45 on molecular targets involved in pro-inflammatory responses, we performed western blot analysis. Expression of inducible nitric oxide (iNOS) significantly decreased in LPS and CG45 co-incubated cells compared to that in LPS only-treated cells. Additionally, another protein thatplays a critical role in inflammation, was down-regulated in cells treated with both LPS and CG45. In the nuclear factor $(NF)-{\kappa}B$ pathway, phosphorylation of $I{\kappa}B{\alpha}$ decreased in RAW264.7 cells treated with both LPS and CG45. Furthermore, CG45 inhibited the phosphorylation of $NF-{\kappa}B$ in LPS-stimulated RAW264.7 cells. Conclusively, CG45 could suppress pro-inflammatory responses in LPS-stimulated RAW264.7 cells by down-regulating not only the phosphorylation of $NF-{\kappa}B$ and $I{\kappa}B{\alpha}$ but also the expression of iNOS and COX-2 without any cytotoxicity.
Keywords
GW10-45; Pleurotus ferulae; inflammation;
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