Regulatory effects of emodin on NF-κB activation and inflammatory cytokine expression in RAW 264.7 macrophages

Author(s):  
Hai-Long Li ◽  
Hai-Long Chen ◽  
Hong Li ◽  
Kai-Li Zhang ◽  
Xiao-Yan Chen ◽  
...  
2010 ◽  
Vol 109 (5) ◽  
pp. 1057-1063 ◽  
Author(s):  
Poonsit Hiransai ◽  
Suvina Ratanachaiyavong ◽  
Arunporn Itharat ◽  
Potchanapond Graidist ◽  
Prasit Ruengrairatanaroj ◽  
...  

Biomolecules ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 511 ◽  
Author(s):  
K. K. Asanka Sanjeewa ◽  
D. P. Nagahawatta ◽  
Hye-Won Yang ◽  
Jae Young Oh ◽  
Thilina U. Jayawardena ◽  
...  

Inflammation is a well-organized innate immune response that plays an important role during the pathogen attacks and mechanical injuries. The Toll-like receptors (TLR)/nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) is a major signal transduction pathway observed in RAW 264.7 macrophages during the inflammatory responses. Here, we investigated the anti-inflammatory effects of Octominin; a bio-active peptide developed from Octopus minor in RAW 264.7 macrophages in vitro. Octominin was found to inhibit lipopolysaccharides (LPS)-stimulated transcriptional activation of NF-κB in RAW 264.7 cells and dose-dependently decreased the mRNA expression levels of TLR4. Specifically, in silico docking results demonstrated that Octominin has a potential to inhibit TLR4 mediated inflammatory responses via blocking formation of TLR4/MD-2/LPS complex. We also demonstrated that Octominin could significantly inhibit LPS-induced secretion of pro-inflammatory cytokine (interleukin-β; IL-1β, IL-6, and tumor necrosis factor-α) and chemokines (CCL3, CCL4, CCL5, and CXCL10) from RAW 264.7 cells. Additionally, Octominin repressed the LPS-induced pro-inflammatory mediators including nitric oxide (NO), prostaglandin E2, inducible NO synthase, and cyclooxygenase 2 in macrophages. These results suggest that Octominin is a potential inhibitor of TLRs/NF-κB signal transduction pathway and is a potential candidate for the treatment of inflammatory diseases.


2012 ◽  
Vol 15 (1) ◽  
pp. 7-11 ◽  
Author(s):  
Eun-A Choi ◽  
Jeung-Won Yoon ◽  
Hak-Joo Choi ◽  
Dong-Hee Kim ◽  
Hwa-Seung Yoo

FEBS Letters ◽  
2017 ◽  
Vol 591 (23) ◽  
pp. 3861-3871 ◽  
Author(s):  
Xia He ◽  
Xin Chen ◽  
Bogang Li ◽  
Jianxin Ji ◽  
Shuang Chen

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