Beneficial vascular risk profile is associated with amyotrophic lateral sclerosis

Nadia Sutedja (1) , Yvonne van Der Schouw (1) , Kathelijn Fischer (1) , Eefje Sizoo (1) , Mark Huisman (1) , Jan Veldink (1) , Leonard van den Berg (1)

1 University Medical Center [Utrecht]

ABSTRACT Objectives Reports of increased amyotrophic lateral sclerosis (ALS) with hyperlipidemia 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. We assessed the association between vascular risk factors and ALS. Methods Traditional cardiovascular risk factors (smoking, hypertension, hypercholesterolemia, 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), 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). Mean LDL and TC levels were significantly lower among patients with a lower functional vital capacity percent 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, had a lower premorbid BMI and favourable lipid profile - all findings consistent with the hypothesis that higher metabolic rate plays a role in ALS.

Mots clés: MOTOR NEURON DISEASE

Nadia Sutedja, Yvonne van Der Schouw, Kathelijn Fischer, Eefje Sizoo, Mark Huisman, et al.. Beneficial vascular risk profile is associated with amyotrophic lateral sclerosis. Journal of Neurology, Neurosurgery and Psychiatry, 2011, 82 (6), pp.638. ⟨10.1136/jnnp.2010.236752⟩. ⟨hal-00629465⟩