Dihydroxyoctadecamonoenoate esters inhibit the neutrophil respiratory burst

David Alan Thompson, Bruce D. Hammock

Research output: Contribution to journalArticle

47 Scopus citations

Abstract

The leukotoxins [9(10)- and 12(13)-EpOME] are produced by activated inflammatory leukocytes such as neutrophils. High EpOME levels are observed in disorders such as acute respiratory distress syndrome and in patients with extensive burns. Although the physiological significance of the EpOMEs remains poorly understood, in some systems, the EpOMEs act as a protoxin, with their corresponding epoxide hydrolase metabolites, 9,10- and 12,13-DiHOME, specifically exerting toxicity. Both the EpOMEs and the DiHOMEs were also recently shown to have neutrophil chemotactic activity. We evaluated whether the neutrophil respiratory burst, a surge of oxidant production thought to play an important role in limiting certain bacterial and fungal infections, is modulated by members of the EpOME metabolic pathway. We present evidence that the DiHOMEs suppress the neutrophil respiratory burst by a mechanism distinct from that of respiratory burst inhibitors such as cyclosporin H or lipoxin A4, which inhibit multiple aspects of neutrophil activation.

Original languageEnglish (US)
Pages (from-to)279-291
Number of pages13
JournalJournal of Biosciences
Volume32
Issue number2
DOIs
StatePublished - Mar 2007

Keywords

  • DHET
  • DiHOME
  • Leukotoxin
  • Neutrophil
  • p47phox
  • Superoxide

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)

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