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  • Title: Effect of ginsenoside Rd on nitric oxide system induced by lipopolysaccharide plus TNF-alpha in C6 rat glioma cells.
    Author: Choi SS, Lee JK, Han EJ, Han KJ, Lee HK, Lee J, Suh HW.
    Journal: Arch Pharm Res; 2003 May; 26(5):375-82. PubMed ID: 12785733.
    Abstract:
    Effects of ginsenosides on nitric oxide (NO) production induced by lipopolysaccharide plus TNF-alpha (LNT) were examined in C6 rat glioma cells. Among several ginsenosides, ginsenoside Rd showed a complete inhibition against LNT-induced NO production. Ginsenoside Rd attenuated LNT-induced increased phosphorylation of ERK. Among several immediate early gene products, only Jun B and Fra-1 protein levels were increased by LNT, and ginsenoside Rd attenuated Jun B and Fra-1 protein levels induced by LNT. Furthermore, LNT increased AP-1 DNA binding activities, which were partially inhibited by ginsenoside Rd. Our results suggest that ginsenoside Rd exerts an inhibitory action against NO production via blocking phosphorylation of ERK, in turn, suppressing immediate early gene products such as Jun B and Fra-1 in C6 glioma cells.
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