Effect of magnesium supplementation on carotid intima-media thickness and flow-mediated dilatation among hemodialysis patients: a double-blind, randomized, placebo-controlled trial

Eur Neurol. 2013;69(5):309-16. doi: 10.1159/000346427. Epub 2013 Mar 14.

Abstract

Objectives: The aim of the present study was to determine the efficacy of oral magnesium (Mg) supplementation on endothelial function through evaluation of carotid intima-media thickness (cIMT), brachial artery flow-mediated dilatation (FMD), and C-reactive protein (CRP) among hemodialysis (HD) patients.

Methods: This randomized, controlled, double-blind clinical trial consisted of 54 patients on HD. One group was treated orally with 440 mg of Mg oxide 3 times per week for 6 months (n = 29). The control group (n = 25) was given placebo using the same administration protocol. cIMT, FMD, serum calcium levels, phosphorus, lipid, CRP, and bicarbonate were measured at baseline and at 6 months in both groups.

Results: At 6 months, cIMT was significantly decreased in the Mg group (0.84 ± 0.13 mm at baseline and 0.76 ± 0.13 mm at 6 months, p = 0.001). However, in the placebo group, cIMT was significantly increased (0.73 ± 0.13 and 0.79 ± 0.12 mm, respectively, p = 0.003). When hypertension, diabetes mellitus, smoking, hyperlipidemia, and systemic lupus erythematosus were controlled for in the analysis, the effect of Mg remained significant in both groups (p = 0.000).

Conclusion: Our results indicate that Mg might not improve endothelial function (CRP level and FMD) and that a decreased cIMT as a marker of atherosclerosis may be due to the inhibition of calcification through the regulation parathormone, calcium, and phosphorus.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Analysis of Variance
  • Brachial Artery / diagnostic imaging
  • Brachial Artery / physiopathology*
  • Carotid Arteries / diagnostic imaging
  • Carotid Arteries / physiopathology*
  • Carotid Intima-Media Thickness*
  • Dilatation / methods*
  • Double-Blind Method
  • Female
  • Follow-Up Studies
  • Humans
  • Kidney Diseases / therapy
  • Magnesium / administration & dosage*
  • Magnesium / blood
  • Male
  • Middle Aged
  • Regression Analysis
  • Renal Dialysis / adverse effects*

Substances

  • Magnesium