Ellen K Hoogeveen1, Johanna M Geleijnse2, Daan Kromhout2, Theo Stijnen3, Eugenie F Gemen4, Ron Kusters4, Erik J Giltay5. 1. Departments of Internal Medicine and Nephrology and ellen.hoogeveen@planet.nl. 2. Division of Human Nutrition, Wageningen University, Wageningen, The Netherlands; and. 3. Departments of Medical Statistics and Bioinformatics and. 4. Clinical Chemistry, Jeroen Bosch Hospital, Den Bosch, The Netherlands; 5. Psychiatry, Leiden University Medical Center, Leiden, The Netherlands.
Abstract
BACKGROUND AND OBJECTIVES:Kidney function gradually decreases with age, and myocardial infarction accelerates this deterioration. Omega-3 (n-3) fatty acids may slow down the decline of kidney function. The effect of marine and plant-derived n-3 fatty acids on kidney function in patients after myocardial infarction was examined. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: In the Alpha Omega Trial, 2344 patients with history of myocardial infarction ages 60-80 years old (81% men) were randomized to one of four trial margarines. The patients received an additional targeted amount of 400 mg/d eicosapentaenoic acid and docosahexaenoic acid, 2 g/d α-linolenic acid, eicosapentaenoic acid-docosahexaenoic acid plus α-linolenic acid, or placebo for 40 months. Serum cystatin C and serum creatinine were assessed at baseline and after 40 months. Creatinine-cystatin C-based GFR was estimated with the Chronic Kidney Disease Epidemiology Collaboration equation. RESULTS: Patients consumed 19.9 g margarine/d, providing an additional 239 mg/d eicosapentaenoic acid with 159 mg/d docosahexaenoic acid, 1.99 g/d α-linolenic acid, or both in the active treatment groups. After 40 months, compared with baseline, mean (±SD) creatinine-cystatin C-based GFR was -6.9 (±12.6), -4.8 (±13.4), -6.2 (±12.8), and -6.0 (±13.0) ml/min per 1.73 m(2) in the placebo, eicosapentaenoic acid-docosahexaenoic acid, α-linolenic acid, and eicosapentaenoic acid-docosahexaenoic acid plus α-linolenic acid groups, respectively. After 40 months, in patients receiving eicosapentaenoic acid-docosahexaenoic acid compared with placebo, the decline in creatinine-cystatin C-based GFR was 2.1 less (95% confidence interval, 0.6 to 3.6; P<0.01) ml/min per 1.73 m(2); other comparisons were not statistical significant. Odds ratios (95% confidence intervals) of incident CKD (<60 ml/min per 1.73 m(2)) and rapid decline of kidney function (≥3 ml/min per year) for eicosapentaenoic acid-docosahexaenoic acid compared with placebo were 0.83 (0.58 to 1.18) and 0.85 (0.67 to 1.08), respectively. CONCLUSIONS: Long-term supplementation with 400 mg/d eicosapentaenoic acid-docosahexaenoic acid provides a small beneficial effect on kidney function in patients with a history of myocardial infarction.
RCT Entities:
BACKGROUND AND OBJECTIVES: Kidney function gradually decreases with age, and myocardial infarction accelerates this deterioration. Omega-3 (n-3) fatty acids may slow down the decline of kidney function. The effect of marine and plant-derived n-3 fatty acids on kidney function in patients after myocardial infarction was examined. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: In the Alpha Omega Trial, 2344 patients with history of myocardial infarction ages 60-80 years old (81% men) were randomized to one of four trial margarines. The patients received an additional targeted amount of 400 mg/d eicosapentaenoic acid and docosahexaenoic acid, 2 g/d α-linolenic acid, eicosapentaenoic acid-docosahexaenoic acid plus α-linolenic acid, or placebo for 40 months. Serum cystatin C and serum creatinine were assessed at baseline and after 40 months. Creatinine-cystatin C-based GFR was estimated with the Chronic Kidney Disease Epidemiology Collaboration equation. RESULTS:Patients consumed 19.9 g margarine/d, providing an additional 239 mg/d eicosapentaenoic acid with 159 mg/d docosahexaenoic acid, 1.99 g/d α-linolenic acid, or both in the active treatment groups. After 40 months, compared with baseline, mean (±SD) creatinine-cystatin C-based GFR was -6.9 (±12.6), -4.8 (±13.4), -6.2 (±12.8), and -6.0 (±13.0) ml/min per 1.73 m(2) in the placebo, eicosapentaenoic acid-docosahexaenoic acid, α-linolenic acid, and eicosapentaenoic acid-docosahexaenoic acid plus α-linolenic acid groups, respectively. After 40 months, in patients receiving eicosapentaenoic acid-docosahexaenoic acid compared with placebo, the decline in creatinine-cystatin C-based GFR was 2.1 less (95% confidence interval, 0.6 to 3.6; P<0.01) ml/min per 1.73 m(2); other comparisons were not statistical significant. Odds ratios (95% confidence intervals) of incident CKD (<60 ml/min per 1.73 m(2)) and rapid decline of kidney function (≥3 ml/min per year) for eicosapentaenoic acid-docosahexaenoic acid compared with placebo were 0.83 (0.58 to 1.18) and 0.85 (0.67 to 1.08), respectively. CONCLUSIONS: Long-term supplementation with 400 mg/d eicosapentaenoic acid-docosahexaenoic acid provides a small beneficial effect on kidney function in patients with a history of myocardial infarction.
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