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Inhibition of NO production in LPS-stimulated mouse macrophage-like cells by trihaloacetylazulenes.
- Source :
-
Anticancer research [Anticancer Res] 2006 Jul-Aug; Vol. 26 (4B), pp. 2921-7. - Publication Year :
- 2006
-
Abstract
- The effects of 26 trihaloacetylazulene derivatives on nitric oxide (NO) production by the mouse macrophage-like Raw 264.7 cells was investigated. The trichloroacetylazulenes [1b-13b] generally showed higher cytotoxicity as compared with the corresponding trifluoroacetylazulenes [1a-13a]. All the compounds inhibited NO production by lipopolysaccharide (LPS)-activated Raw 264.7 cells to various extents. 3-Trifluoroacetylguaiazulene [8a], 1-trifluoroacetyl-4,6,8-trimethylazulene [10a], 3-methyl-l-trichloroacetylazulene [2b] and 3-ethyl-1-trichloroacetylazulene [3b] showed lower cytotoxic activity and most effectively inhibited NO production. Western blot analysis revealed that compounds [8a, 1Oal dose-dependently reduced the intracellular concentration of inducible NO synthase (iNOS), whereas compounds [2b, 3b] only marginally affected the iNOS protein expression. RT-PCR analysis showed that compounds [8a, 2b] reduced the iNOS mRNA expression by approximately 50%. These compounds affected cyclooxygenase-2 protein and mRNA expression, depending on the concentrations. ESR spectroscopy revealed that compounds [8a, 10a, 2b, 3b] neither produced radical, nor scavenged NO, superoxide anion or diphenyl-2-picrylhydrazyl radicals. The present study showed the inhibitory effects of trifluoroacetylazulenes and trichloroacetylazulenes on NO production by activated macrophages.
- Subjects :
- Animals
Azulenes chemistry
Blotting, Western
Cell Line
Cyclooxygenase 2 biosynthesis
Dinoprostone biosynthesis
Electron Spin Resonance Spectroscopy
Free Radical Scavengers pharmacology
Macrophages enzymology
Mice
Nitric Oxide biosynthesis
Nitric Oxide Synthase Type II biosynthesis
Structure-Activity Relationship
Azulenes pharmacology
Lipopolysaccharides pharmacology
Macrophages drug effects
Macrophages metabolism
Nitric Oxide antagonists & inhibitors
Subjects
Details
- Language :
- English
- ISSN :
- 0250-7005
- Volume :
- 26
- Issue :
- 4B
- Database :
- MEDLINE
- Journal :
- Anticancer research
- Publication Type :
- Academic Journal
- Accession number :
- 16886614