Inhibition of arachidonic acid cyclo-oxygenase and lipoxygenase activities of leukocytes by indomethacin and compound BW755C
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Arachidonic acid is metabolized via two pathways in leukocytes: cyclo-oxygenase, leading to the stable prostaglandins, and lipoxygenase, leading to hydroxyacids. Indomethacin inhibits the cyclo-oxygenase selectively, whereas compound BW755C (3-amino-1-(m-(trifluoromethyl)phenyl)-2-pyrazoline) inhibits both pathways equally. This offers a possible explanation for the differing activities of these two compounds in inflammatory models in vivo. The patterns of product inhibition by the two compounds support the suggestion that 11-HETE (hydroxy-eicosatetraenoic acid) and 15-HETE can arise by incomplete operation of the cyclo-oxygenase pathway.
KeywordsPhenyl Prostaglandin Arachidonic Acid Indomethacin Trifluoromethyl
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