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Type: Journal article
Title: N-3 fatty acids reduce plasma 20-hydroxyeicosatetraenoic acid and blood pressure in patients with chronic kidney disease
Author: Barden, A.
Burke, V.
Mas, E.
Beilin, L.
Puddey, I.
Watts, G.
Irish, A.
Mori, T.
Citation: Journal of Hypertension, 2015; 33(9):1947-1953
Publisher: Lippincott Williams & Wilkins
Issue Date: 2015
ISSN: 0263-6352
Statement of
Anne E. Barden, Valerie Burke, Emilie Mas, Lawrence J. Beilin, Ian B. Puddey, Gerald F. Watts, Ashley B. Irish and Trevor A. Mori
Abstract: Background: Metabolism of arachidonic acid by cytochrome P450 [omega]-hydroxylase leads to the formation of 20-hydroxyeicosatetraenoic acid (20-HETE) that regulates vascular function, sodium homeostasis and blood pressure (BP). Supplementation with n-3 fatty acids is known to alter arachidonic acid metabolism and reduce the formation of the lipid peroxidation products F2-isoprostanes, but the effect of n-3 fatty acids on 20-HETE has not been studied. Method: We previously reported a significant effect of n-3 fatty acids but not coenzyme Q10 (CoQ) to reduce BP in a double-blind, placebo-controlled intervention, wherein patients with chronic kidney disease (CKD) were randomized to n-3 fatty acids (4 g), CoQ (200 mg), both supplements or control (4 g olive oil), daily for 8 weeks. This study examined the effect of n-3 fatty acids on plasma and urinary 20-HETE in the same study, as well as plasma and urinary F2-isoprostanes, and relate these to changes in BP. Results: Seventy-four patients completed the 8-week intervention. n-3 fatty acids but not CoQ significantly reduced plasma 20-HETE (P = 0.001) and F2-isoprostanes (P < 0.001). In regression models adjusted for BP at baseline, postintervention plasma 20-HETE was a significant predictor of the fall in SBP (P < 0.0001) and DBP (P < 0.0001) after n-3 fatty acids. Conclusion: This is the first report that n-3 fatty acid supplementation reduces plasma 20-HETE in humans and that this associates with reduced BP. These results provide a plausible mechanism for the reduction in BP observed in patients with CKD following n-3 fatty acid supplementation.
Keywords: 20-hydroxyeicosatetraenoic acid; chronic kidney disease; F2-isoprostanes; n-3 fatty acid supplementation
Rights: Copyright © 2015 Wolters Kluwer Health, Inc. All rights reserved.
DOI: 10.1097/HJH.0000000000000621
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