title: Production of peptide leukotrienes in endotoxin shock.
abstract: Arachidonate metabolites are potent mediators generated in endotoxin shock. Following endotoxin administration (15 mg/kg) into unanesthetized rats, we found a rapid biliary secretion of peptide leukotrienes. Analysis of bile for peptide leukotrienes included organic solvent extractions, reversed phase-HPLC, radioimmunoassay (RIA), and spectrophotometry. The major immunoreactive endogenous leukotriene (LT) from bile was eluted between LTC4 and LTD4 in three chromatographic systems. It corresponded thereby to a biliary metabolite of injected LTC4 and LTD4 which in turn showed the ultraviolet spectrum of a peptide leukotriene. This demonstration of endotoxin-induced generation of peptide LTs in vivo was possible by sequential HPLC and RIA analyses in bile into which peptide LTs are eliminated from blood.
mesh_terms: D000818:Animals; D001646:Bile / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D005260:Female; D011863:Radioimmunoassay; D051381:Rats; D011919:Rats, Inbred Strains; D013189:SRS-A / Q000096:biosynthesis*; D012772:Shock, Septic / Q000378:metabolism*; D013056:Spectrophotometry, Ultraviolet
chemical_list: D013189:SRS-A