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Clinical Trial Summary

The primary objective of this study is to evaluate the efficacy of tofersen in presymptomatic adult carriers of a superoxide dismutase 1 (SOD1) mutation with elevated neurofilament (NF). The secondary objectives of this study are to evaluate the safety and tolerability tofersen and to evaluate the effect of tofersen on pharmacodynamics (PD)/treatment response biomarkers when initiated prior to versus at the time of emergence of clinically manifest amyotrophic lateral sclerosis (ALS).


Clinical Trial Description

n/a


Study Design


Related Conditions & MeSH terms


NCT number NCT04856982
Study type Interventional
Source Biogen
Contact US Biogen Clinical Trial Center
Phone 866-633-4636
Email clinicaltrials@biogen.com
Status Recruiting
Phase Phase 3
Start date May 17, 2021
Completion date August 7, 2027