Effect of Omega-3 Fatty Acids on Plasma Level of 8-Isoprostane in Kidney Transplant Patients

Objective It has been shown previously that the serum level of F2-isoprostanes acts as an indicator of oxidative stress, which is a risk factor for vascular disease especially in end-stage renal disease. It is not known whether n-3 polyunsaturated fatty acids can decrease oxidative stress in renal recipient patients. Design, Setting, and Subjects In this single blind, randomized, placebo-controlled study, the effect of 3 and 6 months of fish oil administration on 8-isoprostane levels in renal transplant recipients was evaluated. Intervention Twenty-two renal transplant patients who fulfilled inclusion and exclusion criteria randomly received either fish oil dietary supplementation, 6 g/day (720 mg of DHA and 1,080 mg of EPA) or placebo for 6 months. Main Outcome Measure Serum 8-isoprostane concentration was measured as markers of oxidative stress. Results A significant decrease in 8-isoprostane levels was observed only in the placebo group after transplantation compared to baseline ( P < 0.05). However, the group receiving fish oil had a significantly lower cholesterol level than that of the placebo group ( P < 0.05). Conclusion On the basis of our results, omega-3 fatty acids supplementation decreased the beneficial effects of kidney transplantation on oxidative stress.