A Study to Assess the Safety, Tolerability, and Effect on Disease Progression of BIIB105 in Participants With Amyotrophic Lateral Sclerosis (ALS) and Participants With the ALS Ataxin-2 (ATXN2) Genetic Mutation

Фаза 1/2 Прекращено NCT04494256

Кратко

The ALSpire Study is a clinical trial evaluating the investigational drug BIIB105 in adults living with amyotrophic lateral sclerosis (ALS). The ALSpire Study consists of two parts: * Part 1: 6-month placebo-controlled study. During Part 1, participants are randomly assigned to receive either BIIB105 or placebo in a 3:1 or 2:1 ratio (depending on the participant's assigned Cohort). * Part 2: up to 3-year long-term open-label extension. During Part 2, all participants receive BIIB105. The objectives of the study are to evaluate: * The safety and tolerability of BIIB105 in people with ALS * What the body does to BIIB105 (also called "pharmacokinetics") * What BIIB105 does to the body (also called "pharmacodynamics") * Whether BIIB105 can slow the worsening of clinical function

Part 1: Number of Participants With Treatment-Emergent Adverse Events (TEAEs) and Treatment-Emergent Serious Adverse Events (TESAEs)

From first dose of the study drug in Part 1 up to end of follow up period in Part 1 (up to Day 260) · Participants

Part 2: Number of Participants With TEAEs and TESAEs

From first dose of the study in Part 2 up to end of follow up period in Part 2 (up to Day 1184) · Participants

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