title: The relation between hypomagnesaemia and vascular stiffness in renal transplant recipients.
abstract: BACKGROUND
  Arterial stiffness is a strong predictor of outcome. Hypomagnesaemia, by its association with arterial hypertension, endothelial dysfunction, dyslipidaemia and inflammation, might affect vascular stiffness. As hypomagnesaemia is common in renal transplant recipients (RTR), we examined its potential association with arterial stiffness.
  
  
  METHODS
  Cross-sectional analysis. Evaluation of vascular stiffness in 512 RTR from two university centres at a median of 72 months post-transplantation. Determination of carotid-femoral pulse wave velocity (PWV) (SphygmoCor). A multiple linear regression analysis was used to investigate the independent relationship between magnesium serum level and PWV with the following covariates: age, diabetes, smoking status, body mass index, blood pressure, heart rate (HR), C-reactive protein (CRP), high-density lipoprotein cholesterol, parathyroid hormone and use of angiotensin-converting enzyme inhibitors/angiotensin receptor blockers, diuretics, calcium channel blockers, statins and calcineurin inhibitors next to their drug levels.
  
  
  RESULTS
  Lower serum magnesium was independently associated with PWV (P = 0.018) in addition to age, CRP, HR, diabetes and mean arterial pressure (model R(2) = 0.45; P < 0.001). The relationship between magnesium and PWV was attenuated (P = 0.054) after adjustment for the use of sirolimus, which was associated with higher magnesium levels (P<0.001) and lower PWV (P = 0.013). In patients >55 years (median age), however (low), magnesium remained an independent predictor of PWV (P = 0.024) after accounting for the same covariates.
  
  
  CONCLUSIONS
  Serum magnesium is an independent predictor of arterial stiffness in RTR, especially in patients >55 years.
authors.affiliation: Renal Division, Department of Internal Medicine, Ghent University Hospital, Ghent, Belgium. steven.vanlaecke@ugent.be
authors.forename: Steven
authors.initials: S
authors.lastname: Van Laecke
authors.forename: Céline
authors.initials: C
authors.lastname: Maréchal
authors.forename: Francis
authors.initials: F
authors.lastname: Verbeke
authors.forename: Patrick
authors.initials: P
authors.lastname: Peeters
authors.forename: Wim
authors.initials: W
authors.lastname: Van Biesen
authors.forename: Olivier
authors.initials: O
authors.lastname: Devuyst
authors.forename: Michel
authors.initials: M
authors.lastname: Jadoul
authors.forename: Raymond
authors.initials: R
authors.lastname: Vanholder
mesh_terms: D001158:Arteries / Q000503:physiopathology*; D003430:Cross-Sectional Studies; D005260:Female; D005919:Glomerular Filtration Rate; D006801:Humans; D007676:Kidney Failure, Chronic / Q000628:therapy*; D007677:Kidney Function Tests; D016030:Kidney Transplantation / Q000009:adverse effects*; D008274:Magnesium / Q000097:blood; D008275:Magnesium Deficiency / Q000175:diagnosis / Q000209:etiology*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012307:Risk Factors; D014652:Vascular Diseases / Q000175:diagnosis / Q000209:etiology*
chemical_list: D008274:Magnesium