Document Detail

Se-methylselenocysteine inhibits lipopolysaccharide-induced NF-κB activation and iNOS induction in RAW 264.7 murine macrophages.
MedLine Citation:
PMID:  21213327     Owner:  NLM     Status:  Publisher    
Scope: Se-methyl-L-selenocysteine (MSC), a naturally occurring organoselenium compound, has shown cancer chemopreventive activity against several types of cancer. Herein, the effect of MSC on the inflammatory response in lipopolysaccharide (LPS)-activated murine RAW 264.7 macrophage cells was investigated.Methods and results: The present results demonstrated that MSC markedly inhibited LPS-induced production of NO in a dose-dependent pattern with decreased mRNA and protein levels of inducible nitric oxide synthase (iNOS). MSC also reduced nuclear translocation of p65 and p50 subunits of nuclear factor-κB (NF-κB), a critical transcription factor necessary for iNOS expression, accompanied with downregulation of LPS-triggered NF-κB-dependent gene expression evaluating by a luciferase reporter. Inhibition of nuclear translocation by MSC might result from the prevention of the inhibitor of NF-κB from phosphorylation and consequent degradation via suppression inhibition of phosphorylation of IκB kinase α/β. Exploring the action mechanism involved, MSC can reduce the phosphorylation/activation of mitogen-activated protein kinases (MAPKs) related to NF-κB activation induced by LPS, including p38 MAPK and c-Jun N-terminal kinase in RAW 264.7 cells.Conclusion: MSC might contribute to the potent anti-inflammatory effect in LPS-activated RAW 264.7 cells via downregulation of NF-κB activation and iNOS expression, suggesting that MSC may be considered as a therapeutic candidate for chronic inflammatory diseases.
Min-Hsiung Pan; Huei-Mei Hong; Chih-Li Lin; Ai-Zhi Jhang; Jie-Heng Tsai; Vladimir Badmaev; Kalyanam Nagabhushanam; Chi-Tang Ho; Wei-Jen Chen
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-1-7
Journal Detail:
Title:  Molecular nutrition & food research     Volume:  -     ISSN:  1613-4133     ISO Abbreviation:  -     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2011-1-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101231818     Medline TA:  Mol Nutr Food Res     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Seafood Science, National Kaohsiung Marine University, Nan-Tzu, Kaohsiung, Taiwan.
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