RRC ID 19282
Author Nakamura T, Kodama N, Arai Y, Kumamoto T, Higuchi Y, Chaichantipyuth C, Ishikawa T, Ueno K, Yano S.
Title Inhibitory effect of oxycoumarins isolated from the Thai medicinal plant Clausena guillauminii on the inflammation mediators, iNOS, TNF-alpha, and COX-2 expression in mouse macrophage RAW 264.7.
Journal J Nat Med
Abstract In the present study, we investigated the inhibitory effect of the known oxycoumarins poncitrin (3), osthol (4), and xanthoxyletin (5), newly isolated from Clausena guillauminii (Rutaceae), together with the known carbazoles heptaphylline (1) and 7-methoxyheptaphylline (2) on inducible-nitric oxide synthase (iNOS) expression induced by lipopolysaccharide (LPS) and the NO generation in RAW 264.7 mouse macrophages. Isolation of active oxycoumarins was guided by Western blot analysis of iNOS protein expression. These oxycoumarins showed an inhibitory effect on iNOS protein expression at 10 microM. Further examination of the inhibitory effects of these compounds on inflammation mediators revealed that the synthesis of nitric oxide (NO) and the protein expression of tumor necrosis factor-alpha (TNF-alpha) and cyclooxygenase-2 (COX-2) were inhibited by 5. It was expected that these compounds show anti-inflammatory activities.
Volume 63(1)
Pages 21-7
Published 2009-1
DOI 10.1007/s11418-008-0277-5
PMID 18636311
MeSH Animals Blotting, Western Cell Line Clausena / chemistry* Coumarins / chemistry Coumarins / isolation & purification Coumarins / pharmacology* Cyclooxygenase 2 / metabolism Inflammation Mediators / metabolism* Macrophages / cytology Macrophages / drug effects* Macrophages / metabolism Mice Nitric Oxide / metabolism Nitric Oxide Synthase Type II / metabolism Plants, Medicinal / chemistry* Tumor Necrosis Factor-alpha / metabolism
IF 1.92
Times Cited 52
Human and Animal Cells RAW 264 (RCB0535)