Nitric Oxide Production-Inhibitory Activity of Limonoids from Azadirachta indica and Melia azedarach.
Chem Biodivers
; 14(6)2017 Jun.
Article
em En
| MEDLINE
| ID: mdl-28145090
ABSTRACT
Seventy-three limonoids isolated from three Meliaceae plants, Azadirachta indica, A. indica var. siamensis, and Melia azedarach, or semi-synthesized from the Meliaceae limonoids, were evaluated for their inhibitory activity against nitric oxide (NO) production in mouse macrophage RAW 264.7 cells induced by lipopolysaccharide (LPS), as a primary screening test for anti-inflammatory agents. Of the compounds tested, 21 compounds exhibited inhibitory activity (IC50 4.6 - 58.6 µm) without any significant toxicity (IC50 > 100 µm) which were more potent than l-NMMA (NO-production inhibitory activity, IC50 65.6 µm; cytotoxicity, IC50 > 100 µm), and among which, nine compounds, i.e., 17-hydroxy-15-methoxynimbocinol (6), ohchinin (20), 1-cis-cinnamoyl-1-decinnamoylohchinin (24), salannin (27), methyl nimbidate (32), isosalannin (55), nimbolinin D (58), mesendanin E (69), and 7-deacetylgedunin (73) exhibited potent inhibitory activity (IC50 4.6 - 29.3 µm). In particular, compounds 6 (IC50 7.3 µm), an azadirone-type limonoid, and 73 (IC50 4.6 µm), a gedunin-type limonoid, exhibited remarkable activity. Western blot analysis revealed that 27 and 73 reduced the expression levels of the inducible NO synthase and cyclooxygenase-2 proteins in a concentration-dependent manner. These findings suggest that limonoids of A. indica, A. indica var. siamensis, and M. azedarach, and their semi-synthetic derivatives may be effective against inflammation.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Azadirachta
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Melia azedarach
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Limoninas
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Anti-Inflamatórios
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Óxido Nítrico
Limite:
Animals
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article