title: (10E,12Z,15Z)-9-hydroxy-10,12,15-octadecatrienoic acid methyl ester as an anti-inflammatory compound from Ehretia dicksonii.
abstract: The methanol extract of Ehretia dicksonii provided (10E, 12Z, 15Z)-9-hydroxy-10,12,15-octadecatrienoic acid methyl ester (1) which was isolated as an anti-inflammatory compound. Compound 1 suppressed 12-Otetradecanoyl-phorbol-13-acetate (TPA)-induced inflammation on mouse ears at a dose of 500 microg (the inhibitory effect (IE) was 43%). Linolenic acid methyl ester did not inhibit this inflammation at the same dose. However, the related compounds of 1, (9Z,11E)-13hydroxy-9,11-octadecadienoic acid (5) and (9Z,llE)13-oxo-9,11-octadecadienoic acid (6), showed potent activity (IE500 microg of 63% and 79%, respectively). Compounds 1, 4 ((9Z, 12Z, 14E)-16-hydroxy-9,12,14-octadecatrienoic acid), 5 and 6 also showed inhibitory activity toward soybean lipoxygenase at a concentration of 10 microg/ml.
authors.affiliation: The United Graduate School of Agricultural Science, Gifu University, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Dong
authors.forename: Y
authors.initials: Y
authors.lastname: Oda
authors.forename: M
authors.initials: M
authors.lastname: Hirota
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D008042:Linolenic Acids / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D016859:Lipoxygenase Inhibitors / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D051379:Mice; D015394:Molecular Structure; D010936:Plant Extracts / Q000737:chemistry; D018515:Plant Leaves / Q000737:chemistry; D010938:Plant Oils / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D010944:Plants / Q000737:chemistry*
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D008042:Linolenic Acids; D016859:Lipoxygenase Inhibitors; D010936:Plant Extracts; D010938:Plant Oils; C062142:9-hydroxy-10,12,15-octadecatrienoic acid