Improvement of a Decreased Anti-oxidative Activity by Edaravone in Amyotrophic Lateral Sclerosis Patients

Background: The free radical scavenger edaravone is a proven neuroprotective drug for patients with amyotrophic lateral sclerosis (ALS). Our objective was to evaluate the therapeutic effects of edaravone for oxidative stress and anti-oxidative activity in ALS patients.

Methods: Twenty-two ALS patients with a disease duration of 2 years, treated by edaravone, and 25 control participants were evaluated according to their clinical scores, including ALS functional rating scale-revised (ALSFRS-R), and serum and cerebrospinal fluid (CSF) markers of oxidative stress dROM and anti-oxidative activity OXY.

Results: Serum and CSF markers of anti-oxidative activity OXY were significantly decreased in ALS patients at pre-treatment compared with controls (p < .01), which was improved in the course of edaravone treatment. Both serum and CSF OXY were significantly correlated with ALS clinical scores including ALSFRS-R (*p < .05, **p < .01, ***p < .001). Furthermore, serum OXY at pre-treatment was significantly correlated with a change in the ALSFRS-R score in the sixth cycle of edaravone treatment (*p < .05).

Conclusions: The present study suggests significant correlations between anti-oxidative activity and ALS clinical severity, and the therapeutic efficacy of edaravone for decreased anti-oxidative activity in ALS.