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Beneficial vascular risk profile is associated with amyotrophic lateral sclerosis
  1. N A Sutedja1,
  2. Y T van der Schouw2,
  3. K Fischer2,
  4. E M Sizoo1,
  5. M H B Huisman1,
  6. J H Veldink1,
  7. L H Van den Berg1
  1. 1Department of Neurology, Rudolf Magnus Institute of Neuroscience, University Medical Centre Utrecht, Utrecht, The Netherlands
  2. 2Julius Centre for Health Sciences and Primary Care, University Medical Centre Utrecht, Utrecht, The Netherlands
  1. Correspondence to Leonard H van den Berg, Department of Neurology, University Medical Centre Utrecht, PO Box 85500, 3508 GA Utrecht, The Netherlands; lberg{at}umcutrecht.nl

Abstract

Objectives Reports of increased amyotrophic lateral sclerosis (ALS) with hyperlipidaemia and elevated plasma homocysteine levels as well as cigarette-smoking and polymorphisms in angiogenic genes suggest a role for altered vascular homeostasis in ALS pathogenesis. The authors assessed the association between vascular risk factors and ALS.

Methods Traditional cardiovascular risk factors (smoking, hypertension, hypercholesterolaemia, diabetes and body mass index (BMI)) and cardiovascular disease prior to ALS onset established by a questionnaire were compared in 334 patients and 538 age- and sex-matched controls. Biochemical assessments (total cholesterol (TC), low-density lipoprotein (LDL), high-density lipoprotein (HDL), hs-CRP, and homocysteine) at diagnosis were measured in blood samples of 303 patients with ALS and compared with prospectively collected data from 2100 population-based controls.

Results Patients with ALS used cholesterol-lowering agents less frequently (OR=0.6, p=0.008) and had a lower BMI (OR=0.9, p=0.001), a lower LDL/HDL ratio (women: OR=0.5, p<0.001; men: OR=0.4, p<0.001) and lower homocysteine levels (women: OR=0.9, p=0.02; men: OR=0.9, p<0.001). The mean LDL and TC levels were significantly lower among patients with a lower functional vital capacity percentage of predicted (FVC). In the univariate analysis, a higher LDL/HDL ratio correlated with increased survival (HR=0.9, p=0.04); after adjusting for the confounders age, site and FVC, no difference was observed.

Conclusions Vascular risk factors, measured clinically and biochemically, were not associated with increased ALS. Instead, patients reported less use of cholesterol-lowering medication and had a lower premorbid BMI and favourable lipid profile—all findings consistent with the hypothesis that a higher metabolic rate plays a role in ALS.

  • Motor neuron disease

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Footnotes

  • JHV and LHVdB contributed equally.

  • Funding Supported by the VSB fonds, The Brain Foundation of the Netherlands, Prinses Beatrix Fonds and the Catharijne Stichting.

  • Competing interests None.

  • Ethics approval Ethics approval was provided by the Medical Institutional Ethical Committee of the University Medical Centre Utrecht.

  • Provenance and peer review Not commissioned; externally peer reviewed.

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