Formation of a novel 20-hydroxylated metabolite of lipoxin A4 by human neutrophil microsomes

Hideki Sumimoto, Ryuichi Isobe, Yoichi Mizukami, Shigeki Minakami

研究成果: Contribution to journalArticle査読

27 被引用数 (Scopus)


Lipoxin A4 (LXA4) is a biologically active compound produced from arachidonic acid via interactions of lipoxygenases. Incubation of LXA4 either with human neutrophils or with the neutrophil microsomes leads to formation of a polar compound on a reverse-phase high-performance liquid chromatography. We have identified the metabolite as 20-hydroxy-LXA4, a novel metabolite of arachidonic acid, on the basis of ultraviolet spectrometry and gas chromatography-mass spectrometry. The LXA4ω -hydroxylation requires both molecular oxygen and NADPH, and is inhibited by carbon monoxide, by antibodies raised against NADPH-cytochrome P-450 reductase, or competitively by leukotriene B4 (LTB4) and LTB5, substrates of LTB4 ω-hydroxylase. These findings indicate that the formation of 20-hydroxy-LXA4 is catalyzed by a neutrophil cytochrome P-450, the LTB4 ω-hydroxylase.

ジャーナルFEBS Letters
出版ステータス出版済み - 1 11 1993

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Structural Biology
  • Biochemistry
  • Molecular Biology
  • Genetics
  • Cell Biology

フィンガープリント 「Formation of a novel 20-hydroxylated metabolite of lipoxin A<sub>4</sub> by human neutrophil microsomes」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。