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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/27075

    標題: Eugenolol and glyceryl-isoeugenol suppress LPS-induced iNOS expression by down-regulating NF-kappaB AND AP-1 through inhibition of MAPKS and AKT/IkappaBalpha signaling pathways in macrophages.
    作者: Yeh, JL
    Hsu, JH
    Hong, YS
    Wu, JR
    Liang, JC
    Wu, BN
    Chen, IJ
    Liou, SF.
    貢獻者: 藥學系
    關鍵字: inflammation
    mitogen-activated protein kinases
    transcription factor
    日期: 2011-04
    上傳時間: 2013-10-25 15:33:52 (UTC+8)
    出版者: BIOLIFE SAS
    摘要: Eugenol and isoeugenol, two components of clover oil, have been reported to possess several biomedical properties, such as anti-inflammatory, antimicrobial and antioxidant effects. This study aims to examine the anti-inflammatory effects of eugenol, isoeugenol and four of their derivatives on expression of inducible nitric oxide synthase (iNOS) activated by lipopolysaccharide (LPS) in mouse macrophages (RAW 264.7), and to investigate molecular mechanisms underlying these effects. We found that two derivatives, eugenolol and glyceryl-isoeugenol, had potent inhibitory effects on LPS-induced upregulation of nitrite levels, iNOS protein and iNOS mRNA. In addition, they both suppressed the release of tumor necrosis factor-alpha (TNF-alpha) and interleukin-1 beta (IL-1 beta) induced by LPS. Moreover, they both attenuated the DNA binding of NF-kappa B and AP-1, phosphorylation of inhibitory kappa B alpha (I kappa B alpha), and nuclear translocation of p65 protein induced by LPS. Finally, we demonstrated that glyceryl-isoeugenol suppressed the phosphorylation of ERK1/2, JNK and p38 MAPK, whereas eugenolol suppressed the phosphorylation of ERK1/2 and p38 MAPK. Taken together, these results suggest that that eugenolol and glyceryl-isoeugenol suppress LPS-induced iNOS expression by down-regulating NF-kappa B and AP-1 through inhibition of MAPKs and Akt/I kappa B alpha signaling pathways. Thus, this study implies that eugenolol and glyceryl-isoeugenol may provide therapeutic benefits for inflammatory diseases.
    Appears in Collections:[藥學系(所)] 期刊論文

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