Elevated plasma homocysteine levels in patients with amyotrophic lateral sclerosis

Neurology
S ZoccolellaG Logroscino

Abstract

Both in vitro and in vivo studies indicate that homocysteine (Hcy) may be directly involved in the damage of motor neurons and in several pathways implicated in amyotrophic lateral sclerosis (ALS) pathogenesis. To determine whether plasma Hcy levels were higher in ALS patients than healthy controls and to examine the relationship between Hcy levels and clinical ALS phenotypes. In a cross-sectional study, we compared Hcy, B(12), and folate levels in 62 patients with ALS and 88 age- and sex-matched controls recruited as outpatients in a tertiary clinical center. Patients with ALS had higher median plasma Hcy levels (11.2 [range 5.8 to 46] vs 9.7 [range 4.5 to 15.9] micromol/L; p = 0.0004) and lower folate levels (4.4 [range 1.7 to 22.1] vs 5.8 [range 2.3 to 21.1] ng/mL; p = 0.0003), compared with controls. Multivariate logistic regression revealed a strong direct association between plasma Hcy levels and presence of ALS (odds ratios adjusted for age, sex, and B-vitamin levels comparing the top tertile [Hcy levels >or= 11.6 micromol/L] with the bottom tertile [Hcy levels < 9.2 micromol/L]: 6.4; 95% CI 2.2 to 19.1; p for trend = 0.0008). We also found a trend for higher Hcy levels in patients with shorter interval from symptom onse...Continue Reading

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