In vitro and in vivo therapeutics of β-thujaplicin on LPS-induced inflammation in macrophages and septic shock in mice

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標題:	In vitro and in vivo therapeutics of β-thujaplicin on LPS-induced inflammation in macrophages and septic shock in mice
作者:	Shih, MF Chen, LY Tsai, PJ Cherng, JY.
貢獻者:	藥學系
關鍵字:	inflammation beta-thujaplicin iNOS TNF-alpha septic shock
日期:	2011-01
上傳時間:	2013-10-25 15:33:46 (UTC+8)
出版者:	Biolife Sas
摘要:	beta-thujaplicin, an active constituent from Chamaecyparis obtusa, has been shown to have acaricidal and antimicrobial effects. Very few studies have focused on the potential of the anti-inflammatory effect of beta-thujaplicin. Moreover, its capability of inhibiting inflammatory mediators e.g. TNF-alpha gene transcription, nitric oxide (NO) and prostaglandin E2, remains unknown. Besides those molecular mechanisms behind the anti-inflammatory effect of beta-thujaplicin, solid proof of its effectiveness in vivo has not yet been studied. In our study, in vitro effects of beta-thujaplicin were verified on RAW 264.7 macrophages which were stimulated by LPS. Indomethacin was used as a positive control. The inducible NO production after stimulation was measured by Griess reagent. PGE2, IL-6 and TNF-alpha were measured by ELISA methods. Protein expressions of iNOS, COX2, and NF-kappa B were evaluated by Western blotting. Septic ICR mice were administered 20 mg/kg of LPS and then the mortality rate was monitored. Within the concentration range which was devoid of cytotoxicty, beta-thujaplicin exhibited a clear dose-dependent inhibition on LPS-induced NO production. Furthermore, beta-thujaplicin inhibited LPS-induced PGE2, IL-6, and TNF-alpha production as well as iNOS, COX2, and NF-kappa B protein expression more substantially potent than indomethacin. In agreement with the in vitro study, beta-thujaplicin was shown to be effective in vivo for inhibiting LPS-induced NO and TNF-alpha production and a significant decrease in mortality rate of mice suffering from septic shock was observed. This study demonstrates the potential of beta-thujaplicin in treatment of inflammation and sepsis. These effects occur through an efficient blockage of TNF-alpha and iNOS production. beta-thujaplicin efficacy is comparable to that of indomethacin thus it can be a substitution but bear less depletion of PGE2, making this compound very promising in clinical applications
關聯:	International Journal Immunopathol pharmacology, 25(1), pp.39-48
显示于类别:	[藥學系(所)] 期刊論文

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