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  • Title: Comparative activity of leukotriene D4, 5,6-dihydroxy-eicosatetraenoic acid and lipoxin A on guinea pig lung parenchyma and ileum smooth muscle.
    Author: Cristol JP, Sirois P.
    Journal: Res Commun Chem Pathol Pharmacol; 1988 Mar; 59(3):423-6. PubMed ID: 3363228.
    Abstract:
    Various compounds derived from the 5-lipoxygenase pathway of arachidonic acid (Leukotriene D4 [LTD4], 5S,6R-dihydroxy-7,9,11,14- eicosatetraenoic acid [5S,6R-DiHETE], 5S,6S-DiHETE, 5S,6R-Lipoxin A [5S,6R-Lx A], 5S,6S-Lx A) were tested on guinea-pig lung parenchyma strips (G.P.L.P.S.) and ileum smooth muscles (G.P.I.S.M.) mounted in a cascade superfusion system. These products induced contractile responses on G.P.L.P.S., whereas only the LTD4 was active on G.P.I.S.M. FPL-55712 inhibited almost totally their myotropic activity. The 5S,6R compounds were more active than the 5S,6S ones, with an order of potency of LTD4 greater than 5,6-DiHETE greater than Lx A. It is suggested that 5,6-DiHETE and Lx A isomers may act via the lung LTD4 receptors which appear less specific than ileum LTD4 receptors.
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