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- W377713543 abstract "We previously found that enteral nutrition with diets containing elevated levels of eicosapentaenoic acid (EPA; 20:5 n-3) reduced the number of neutrophils in bronchoalveolar lavage fluid and improved clinical outcome of patients with or at risk for adult respiratory distress syndrome (ARDS). We have also shown that the treatment of the neutrophil-like cell line, HL-60, with EPA can induce apoptosis. It is not known, however, if the addition of EPA to the diet would result in similar occurrences in neutrophils. It has been suggested that the use of diets enriched with stearidonic acid (SDA; 18:4 n-3) may provide a novel source of n-3 fatty acids while offering similar beneficial effects on health as diets containing EPA. Therefore, we examined whether dietary SDA can be used as a precursor to increase EPA content in liver tissue. It is well known that endotoxin increases neutrophil lifespan and that this may be important in maintaining innate immune response. The second part of this study incorporated the use of glycogen-elicited peritoneal neutrophils from the rat to examine the effect of dietary intervention with n-3 fatty acids (either EPA or SDA) on constitutive and endotoxin induced neutrophil survival. Male Long-Evans rats (n=18) were randomly divided into 3 dietary groups and fed a modified US-17 diet providing 200kcal/kg/day and containing 2% oleic acid (OA; 18:1 n-9) (n=6), 1% EPA/1% OA (n=6), or 1% SDA/1% OA (n=6) for 2 weeks. Liver phospholipids were analyzed using gas chromatography and neutrophil lifespan was evaluated using flow cytometry. Dietary supplementation with EPA significantly increased the concentration of EPA and docosapentaenoic acid (DPA, 22:5n3), but not docosahexaenoic acid (DHA, 22:6n3) in liver tissue as compared with animals fed OA. Dietary supplementation with SDA also increased tissue contents of EPA and DPA, but not DHA as compared with OA fed controls. The increase in" @default.
- W377713543 created "2016-06-24" @default.
- W377713543 creator A5020787250 @default.
- W377713543 date "2005-01-01" @default.
- W377713543 modified "2023-09-27" @default.
- W377713543 title "Effect of Dietary Treatment with Stearidonic Acid and Eicosapentaenoic Acid on Membrane Phospholipid Fatty Acid Composition and Glycogen-Elicited Peritoneal Neutrophil Survival in Absence or Presence of Bacterial Endotoxin" @default.
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