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- W1989101096 abstract "As guinea-pig pulmonary macrophages (PM) synthesize the linoleic acid metabolite 9-hydroxy-octadecadienoic acid (9-OH-Lin) under non-stimulated conditions in relatively large quantities, we investigated whether this product has an effect on the macrophage's own phagocytic cell function. 9-OH-Lin, and also its hydroperoxy precursor 9-hydroperoxy-octadecadienoic acid (9-OOH-Lin), influenced the generation of PM chemiluminescence, a measure of the production of reactive oxygen species. The generation of lucigenin-enhanced chemiluminescence by stimulated and non-stimulated PM was inhibited concentration-dependently. Inhibition was observed at concentrations as low as 10 nM. Since 9-OH-Lin and 9-OOH-Lin also inhibited the generation of chemiluminescence by a cell-free enzyme system, i.e. xanthine/xanthine oxidase, the inhibitory effects might represent a scavenging activity towards reactive oxygen species. 9-OH-Lin and 9-OOH-Lin did not influence other phagocytic cell functions, e.g. PM phagocytic capacity, the aggregatory response to the calcium ionophore A23187, or the release of lysosomal enzymes. The effects of 9-OH-Lin and 9-OOH-Lin could be ascribed to the hydroxy and hydroxyperoxy moiety, respectively, as evidenced by lack of effect of the native fatty acid linoleic acid. We conclude that the formation of 9-OH-Lin and 9-OOH-Lin by PM may represent a regulatory mechanism towards the cell's own activity by modulating reactive oxygen species." @default.
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- W1989101096 date "1989-09-01" @default.
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- W1989101096 title "Modulatory activity of 9-hydroxy- and 9-hydroperoxy-octadecadienoic acid towards reactive oxygen species from guinea-pig pulmonary macrophages" @default.
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- W1989101096 doi "https://doi.org/10.1111/j.1432-1033.1989.tb15007.x" @default.
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