alexa Identification of 14,20-dihydroxy-docosahexaenoic acid as a novel anti-inflammatory metabolite.
Chemistry

Chemistry

Modern Chemistry & Applications

Author(s): Yokokura Y, Isobe Y, Matsueda S, Iwamoto R, Goto T,

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Abstract Docosahexaenoic acid (DHA) exhibits anti-inflammatory activity related to some of its oxygenated metabolites, such as D-series resolvins, protectin and maresin. Here, we analysed the lipids in inflammatory exudates using liquid chromatography-tandem mass spectrometry and identified a novel DHA metabolite, 14,20-dihydroxy-DHA (14,20-diHDHA) and showed that it is biosynthesized by eosinophils through the 12/15-lipoxygenase pathway. The chemical structure of the dominant 14,20-diHDHA isomer, which is endogenously biosynthesized by eosinophils, was identified as 14S,20R-diHDHA using chemically synthesized stereoisomers. Nanogram doses of 14,20-diHDHA displayed a potent anti-inflammatory action by limiting neutrophil infiltration in zymosan-induced peritonitis. The in vivo formation and potent anti-inflammatory action of 14,20-diHDHA may contribute to the protective effects of DHA. © The Authors 2014. Published by Oxford University Press on behalf of the Japanese Biochemical Society. All rights reserved. This article was published in J Biochem and referenced in Modern Chemistry & Applications

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