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Journal of the American Society of Nephrology, Vol 5, 1434-1440, Copyright © 1995 by American Society of Nephrology

REGULAR ARTICLES

No effect of dietary fish oil on renal hemodynamics, tubular function, and renal functional reserve in long-term renal transplant recipients

JM Hansen, H Lokkegaard, CE Hoy, N Fogh-Andersen, NV Olsen and S Strandgaard
Department of Clinical Physiology, Herlev Hospital, University of Copenhagen, Denmark.

Dietary supplementation with fish oil rich in n-3 polyunsaturated fatty acids has been suggested to protect the kidney against cyclosporin A (CsA) toxicity. This study investigated the effects of a 10-wk dietary supplementation with fish oil on renal function and renal functional reserve in healthy volunteers (N = 9) and two groups of stable long- term kidney-transplanted patients treated with maintenance low-dose CsA (3.0 +/- 0.6 mg/kg; N = 9) or without CsA (N = 9). After an overnight fast, the subjects were water loaded, and clearance studies were performed, postponing morning medication. GFR and effective RPF were measured as the renal clearances of (99mTc)DTPA and (131I)hippuran, respectively. Renal tubular function was evaluated by use of the renal clearance of lithium and the urinary excretion of beta 2-microglobulin. Fish oil did not change baseline values of effective RPF, GFR, lithium clearance, and urinary excretion of beta 2-microglobulin in any of the groups. The infusion of amino acids induced a comparable increase in GFR, lithium clearance, and the urinary excretion rate of beta 2- microglobulin in all three groups with no additional effect of fish oil. Thus, long-term renal transplant recipients treated with a low maintenance dose of CsA had a well-preserved renal functional reserve, and dietary supplementation with fish oil in these patients did not improve renal function.


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D. Hernandez, R. Guerra, A. Milena, A. Torres, S. Garcia, C. Garcia, P. Abreu, A. Gonzalez, M. A. Gomez, M. Rufino, et al.
Dietary fish oil does not influence acute rejection rate and graft survival after renal transplantation: a randomized placebo-controlled study
Nephrol. Dial. Transplant., May 1, 2002; 17(5): 897 - 904.
[Abstract] [Full Text] [PDF]


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