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Department of Pharmacology, Erasmus University, Rotterdam, The Netherlands.
Prostaglandins, leukotrienes and mono-hydroxy acid products of arachidonic acid were measured in mucus of freshly recovered morning stools of a patient with an exacerbation of ulcerative proctocolitis. Eicosanoids in ether extracts were separated by high performance liquid chromatography and amounts determined by radioimmunoassay. Four hydroxy-eicosatetraenoic acids were detected, of which the most important one was identified as 15-hydroxy eicosatetraenoic acid (530 ng/g mucus). Leukotriene B4 was also present (21 ng/g mucus) and small amounts of immunoreactive leukotriene C4 (less than 0.8 ng/g mucus). The prostaglandins 6-keto-PGF1 alpha and PGE2 and thromboxane B2 were found in amounts of 3.7, 2.0 and 9.2 ng/g mucus, respectively.
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