Saucerneol D, a naturally occurring sesquilignan, inhibits LPS-induced iNOS expression in RAW264.7 cells by blocking NF-κB and MAPK activation

Tae Chul Moon, Jin Cheul Kim, Seung Eun Song, Seok Jong Suh, Chang Seob Seo, Youn Kyung Kim, Meihua Jin, Ju Hye Yang, Jong Keun Son, Yurngdong Jahng, Cheorl Ho Kim, Hyeun Wook Chang

Research output: Contribution to journalArticlepeer-review

21 Scopus citations

Abstract

We evaluated the ability of saucerneol D (SD), a tetrahydrofuran-type sesquilignan isolated from Saururus chinensis, to regulate the expression of inducible nitric oxide synthase (iNOS) in lipopolysaccharide (LPS)-stimulated murine macrophage-like RAW264.7 cells. SD consistently inhibited nitric oxide (NO) production in a dose-dependent manner, with an IC50 of 2.62 μM, and also blocked LPS-induced iNOS expression. SD potently suppressed both the reporter gene expression and DNA-binding activity of nuclear factor-κB (NF-κB). In addition, SD inhibited IκB-α degradation in a concentration- and time-dependent manner. SD also inhibited LPS-induced activation of various mitogen-activated protein kinases, including extracellular signal-regulated kinase 1/2 (ERK1/2) and c-Jun NH2-terminal kinase (JNK). These findings suggest that SD may inhibit LPS-induced iNOS expression by blocking NF-κB and MAPK activation.

Original languageEnglish
Pages (from-to)1395-1400
Number of pages6
JournalInternational Immunopharmacology
Volume8
Issue number10
DOIs
StatePublished - Oct 2008

Keywords

  • Electrophoretic mobility shift analysis;
  • Inducible nitric oxide synthase;
  • Mitogen-activated protein kinases
  • NF-κB;
  • Saucerneol D;
  • Saururus chinensis;

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