title: The effects of omega-3 fatty acid on vitamin D activation in hemodialysis patients: a pilot study.
abstract: The high incidence of cardiovascular disease and vitamin D deficiency in chronic kidney disease patients is well known. Vitamin D activation by omega-3 fatty acid (FA) supplementation may explain the cardioprotective effects exerted by omega-3 FA. We hypothesized that omega-3 FA and 25-hydroxyvitamin D (25(OH)D) supplementation may increase 1,25-dihydroxyvitamin D (1,25(OH)2D) levels compared to 25(OH)D supplementation alone in hemodialysis (HD) patients that have insufficient or deficient 25(OH)D levels. We enrolled patients that were treated for at least six months with 25(OH)D < 30 ng/mL (NCT01596842). Patients were randomized to treatment for 12 weeks with cholecalciferol supplemented with omega-3 FA or a placebo. Levels of 25(OH)D and 1,25(OH)2D were measured after 12 weeks. The erythrocyte membrane FA contents were also measured. Levels of 25(OH)D were increased in both groups at 12 weeks compared to baseline. The 1,25(OH)2D levels at 12 weeks compared to baseline showed a tendency to increase in the omega-3 FA group. The oleic acid and monounsaturated FA content decreased, while the omega-3 index increased in the omega-3 FA group. Omega-3 FA supplementation may be partly associated with vitamin D activation, although increased 25(OH)D levels caused by short-term cholecalciferol supplementation were not associated with vitamin D activation in HD patients.
authors: Department of Internal Medicine, Dong-A University, Busan 602-715, Korea. promise131@hanmail.net.
authors: Su Mi
authors: SM
authors: Lee
authors: Department of Internal Medicine, Dong-A University, Busan 602-715, Korea. kidney@dau.ac.kr.
authors: Young Ki
authors: YK
authors: Son
authors: Department of Internal Medicine, Dong-A University, Busan 602-715, Korea. sekim@dau.ac.kr.
authors: Seong Eun
authors: SE
authors: Kim
authors: Department of Internal Medicine, Dong-A University, Busan 602-715, Korea. anws@dau.ac.kr.
authors: Won Suk
authors: WS
authors: An
mesh_terms: D065767:Activation, Metabolic / Q000187:drug effects; D000368:Aged; D002762:Cholecalciferol / Q000494:pharmacology; D004032:Diet; D019587:Dietary Supplements; D004311:Double-Blind Method; D004910:Erythrocyte Membrane / Q000187:drug effects / Q000378:metabolism; D015525:Fatty Acids, Omega-3 / Q000494:pharmacology*; D005260:Female; D006801:Humans; D006887:Hydroxycholecalciferols / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D019301:Oleic Acid / Q000097:blood; D010865:Pilot Projects; D006435:Renal Dialysis / Q000009:adverse effects*; D014807:Vitamin D / Q000378:metabolism*; D014808:Vitamin D Deficiency / Q000188:drug therapy / Q000209:etiology; D014815:Vitamins / Q000494:pharmacology
chemical_list: D015525:Fatty Acids, Omega-3; D006887:Hydroxycholecalciferols; D014815:Vitamins; D014807:Vitamin D; D002762:Cholecalciferol; D019301:Oleic Acid
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