Abstract
The effect of a combination of aspirin and fish oil on eicosanoids was studied. Four subjects were given 37.5 mg aspirin orally, and 6 weeks later they received a natural, stable fish oil daily for 1 week before taking the same single dose of aspirin. Blood samples for determination of whole blood production of eicosanoids were taken before and after each experimental period. Serum thromboxane A2was decreased by 40% (P<0.05) after aspirin alone, but by 62% (P<0.01) after fish oil + aspirin. Serum prostacyclin (measured as 6-keto PGF1a) was decreased by aspirin in both cases. The sum of 6-keto PGF1aand its equipotent fish oil-derived analogue Δ17-6-keto PGF1awas reduced after aspirin intake (55%, NS), but after fish oil + aspirin the reduction was smaller (33%, NS). Leukotriene B4was increased by 19% (P<0.05) after aspirin, and decreased by 69% (P<0.05) after fish oil + aspirin. A combination of stable fish oil and aspirin thus improves the eicosanoid pattern more than aspirin alone.
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