Abstract
The present study was performed to investigate the effects of dietary fish oil supplements on renal function and renal prostaglandin (PG) E metabolism. The usual "western" diet of 10 healthy volunteers (six female and 4 male) aged between 21 and 35 years was supplemented with 6 g/day of n-3 polyunsaturated fatty acids [3.6 g of eicosapentaenoic acid (EPA) and 2.4 g of docosahexaenoic acid (DHA)] for six weeks. Supine arterial blood pressure (BP) and heart rate (HR), renal hemodynamics, renal excretory function and urinary excretion of PGE2 and PGE3 were determined before and at the end of the fish oil supplementation period. No changes could be observed in BP and HR while renal plasma flow (RPF), determined as the clearance of PAH, significantly increased from 559 +/- 44 to 738 +/- 47 ml/min (P less than 0.001) with the fish oil supplements. This was associated with a decrease in renal vascular resistance from (8.11 +/- 0.54).10(-2) to (6.37 +/- 0.38).10(-2) mm Hg.min.ml-1 (P less than 0.01). Glomerular filtration rate (GFR), determined as the clearance of inulin, increased from 97 +/- 3 to 107 +/- 3 ml/min (P less than 0.01), resulting in a decrease in filtration fraction from an average of 0.19 +/- 0.01 to 0.15 +/- 0.01 (P less than 0.01).(ABSTRACT TRUNCATED AT 250 WORDS)
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