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Structural requirement for the action of leukotriene B4 on the guinea-pig lung:importance of double bond geometry in the 6, 8, 10-triene unit
Authors:P Sirois  S Roy  P Borgeat  S Picard  E J Corey
Institution:Unité de Recherche Pulmonaire, Faculté de Médecine Université de Sherbrooke, Sherbrooke, P.Q., Canada;Groupe de Recherche en Endocrinologie Moléculaire CHUL, Québec, Canada;Dept. of Chemistry, Harvard University, Cambrige, Mass. 02138, U.S.A.
Abstract:The action of four synthetic 5(S), 12(R)-dihydroxy-6,8,10,14-eicosatetraenoic acids has been compared to the action of natural leukotriene B4 (LTB4) in perfused guinea-pig lung and in the parenchymal strip preparations. Synthetic LTB4 (Fig. 1) having the 6-cis, 8, 10-trans triene unit was found to be as powerful as natural LTB4 both for contracting the parenchymal strip and for releasing prostaglandins and thromboxanes from the perfused lung while three other isomers were inactive. The results indicate that the action of LTB4 on the lung is highly dependent on the geometry of the conjugated triene.
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