Pleurotus giganteus (Berk. Karun & Hyde), the giant oyster mushroom inhibits NO production in LPS/H2O2 stimulated RAW 264.7 cells via STAT 3 and COX-2 pathways

BMC Complementary and Alternative Medicine

Research Article

Mani Ravishankar Ram¹  Asweni Baskaran²  Vikineswary Sabaratnam²  Kek Heng Chua³  Umah Rani Kuppusamy³ 

[1] Department of Biomedical Science, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia;Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia;Mushroom Research Centre, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia;Mushroom Research Centre, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia;Department of Biomedical Science, Faculty of Medicine, University of Malaya, 50603, Kuala Lumpur, Malaysia;

关键词: Mushroom;    Pleurotus giganteus;    anti-inflammation;    NO production;    Lipopolysaccharide;    Macrophage;    STAT 3;    COX-2;   

DOI  :  10.1186/s12906-016-1546-6

 received in 2015-08-07, accepted in 2016-12-20,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundPleurotus giganteus (Berk. Karunarathna and K.D. Hyde), has been used as a culinary mushroom and is known to have medicinal properties but its potential as an anti-inflammatory agent to mitigate inflammation triggered diseases is untapped. In this study, the molecular mechanism underlying the protective effect of ethanol extract of P. giganteus (EPG) against lipopolysaccharide (LPS) and combination of LPS and hydrogen peroxide (H2O2)-induced inflammation on RAW 264.7 macrophages was investigated.MethodThe effect of EPG on nitric oxide (NO) production as an indicator of inflammation in RAW 264.7 macrophages was estimated based on Griess reaction that measures nitrite level. The expressions of inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), NF-kB activating protein (NKAP), signal transducer and activator of transcription 3 protein (STAT 3) and glutathione peroxidase (GPx) genes were assessed using real time reverse transcription polymerase chain reaction (RT-PCR) approach.ResultsEPG (10 μg/ml) showed the highest reduction in the LPS-induced NO production in RAW 264.7 macrophages and significantly suppressed (p < 0.05) the expression iNOS, STAT 3 and COX-2. There was a significant increase (p < 0.05) in combination of LPS and H2O2- induced iNOS production when compared to the LPS-induced iNOS production in RAW 264.7 macrophages and this concurred with the NO production which was attenuated by EPG at 10 μg/ml. A significant (p < 0.05) down regulation was observed in the combination of LPS and H2O2-induced iNOS and GPx expression by EPG.ConclusionsOur data suggest that the anti-inflammatory activity of EPG is mediated via the suppression of the STAT 3 and COX-2 pathways and can serve as potential endogenous antioxidant stimulant.

【 授权许可】

CC BY   
© The Author(s). 2017

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