Release of Leukotriene A4 Versus Leukotriene B4 from Human Polymorphonuclear Leukocytes

作者: Angelo Sala , Manlio Bolla , Simona Zarini , Reiner Müller-Peddinghaus , Giancarlo Folco

DOI: 10.1074/JBC.271.30.17944

关键词:

摘要: The reactive intermediate formed by 5-lipoxygenase metabolism of arachidonic acid, leukotriene A4, is known to be released from cells and subsequently taken up other for biochemical processing. objective this study was determine the relative amount A4 synthesized human polymorphonuclear leukocytes (PMNL) that available transcellular biosynthetic processes. This accomplished diluting cell suspensions measuring amounts enzymatic versus nonenzymatic A4-derived metabolites after challenge with Ca2+ ionophore A23187. Nonenzymatic were used as a quantitative index into extracellular milieu. results obtained demonstrated in PMNL, increased decreasing concentrations. After 20-fold dilution PMNL preparations, doubling observed following (from 53.9 ± 1.3 110.4 8.9 pmol/106 p

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