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- W1540967515 abstract "Analysis of neutrophil phospholipids from rats fed an essential fatty acid-deficient diet revealed a 33% reduction in arachidonate and a 90% reduction in linoleate compared to neutrophil phospholipids of rats fed a normal diet. The neutrophil phospholipids from rats fed the essential fatty acid-deficient diet also contained significant amounts of 5,8,11-eicosatrienoate, a fatty acid not found in the neutrophils of rats fed a normal diet. Analysis of the production of leukotrienes of the B series by ionophore-stimulated neutrophils from rats fed an essential fatty acid-deficient diet revealed a 87% reduction in leukotriene B4 compared to neutrophils from rats fed a normal diet even though the arachidonate content was reduced by only 34%. Essential fatty acid-deficient neutrophils converted endogenous 5,8,11-eicosatrienoic acid to leukotriene A3 and its nonenzymatic degradation products, but little or no leukotriene B3 was formed. Neutrophils from rats fed a normal diet incubated with ionophore and exogenous 5,8,11-eicosatrienoate also produced leukotriene A3 and its nonenzymatic degradation products but little or no leukotriene B3. Exogenous 5,8,11-eicosatrienoate incubated with ionophore-stimulated normal neutrophils caused a dose-dependent inhibition of leukotriene A hydrolase resulting in diminished production of leukotriene B4 from endogenous arachidonate. Assays of leukotriene A hydrolase in the 10,000 X g supernatant fraction of a homogenate of RBL-1 cells revealed that a lipoxygenase metabolite of 5,8,11-eicosatrienoate rather than 5,8,11-eicosatrienoate itself is the inhibitor of leukotriene A hydrolase. Thus the finding that leukotriene B4 production by neutrophils from essential fatty acid-deficient rats is diminished out of proportion to the decrease in arachidonate content appears to be due to inhibition of leukotriene A hydrolase by a lipoxygenase metabolite." @default.
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- W1540967515 date "1984-10-01" @default.
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- W1540967515 title "Leukotriene B formation by neutrophils from essential fatty acid-deficient rats." @default.
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- W1540967515 doi "https://doi.org/10.1016/s0021-9258(20)71280-9" @default.
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