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Study to Evaluate the Efficacy, Safety, Pharmacokinetics and Pharmacodynamics of ION363 in Amyotrophic Lateral Sclerosis Participants With Fused in Sarcoma Mutations (FUS-ALS)
NCT04768972

The primary purpose of this study is to evaluate the efficacy of ION363 on clinical function and survival in carriers of fused in sarcoma mutations with amyotrophic lateral sclerosis (FUS-ALS).
Phase 3

The primary purpose of this study is to evaluate the efficacy of ION363 on clinical function and survival in carriers of fused in sarcoma mutations with amyotrophic lateral sclerosis (FUS-ALS).

Study to Evaluate the Safety, Tolerability, and Pharmacokinetics of ION464 Administered to Adults With Multiple System Atrophy (HORIZON)
NCT04165486

The primary objectives are to evaluate the safety and tolerability of multiple doses of ION464 administered via intrathecal (IT) injection (Part 1) and to evaluate the long-term safety and tolerability of ION464 (Part 2) in participants with multiple system atrophy (MSA). The secondary objectives are to evaluate the pharmacodynamic (PD) effect of ION464 on the level of a potential biomarker of target engagement (Parts 1 and 2) and to evaluate the pharmacokinetic (PK) profile of ION464 in serum (Part 1).
Phase 1

The primary objectives are to evaluate the safety and tolerability of multiple doses of ION464 administered via intrathecal (IT) injection (Part 1) and to evaluate the long-term safety and tolerability of ION464 (Part 2) in participants with multiple system atrophy (MSA). The secondary objectives are to evaluate the pharmacodynamic (PD) effect of ION464 on the level of a potential biomarker of target engagement (Parts 1 and 2) and to evaluate the pharmacokinetic (PK) profile of ION464 in serum (Part 1).

A Study to Evaluate the Safety and Efficacy of ION373 in Patients With Alexander Disease (AxD)
NCT04849741
ION373-CS1
The purpose of this study is to evaluate the safety and efficacy of zilganersen (ION373) in improving or stabilizing gross motor function across the full range of affected domains in patients with AxD.
Phase 3
zilganersen
This is a Phase 1-3, multi-center, double-blind, placebo-controlled, multiple-ascending dose (MAD) study in approximately 73 patients with AxD. Participants will be randomized in a 2:1 ratio to receive zilganersen (ION373) or matching placebo for a 60-week double-blind treatment period; then all participants will receive zilganersen for a 60-week open-label treatment period followed by a 120-week open-label, long-term extension period, and a 28-week post-treatment follow-up period. Multiple dose cohorts will be evaluated in the study. Cohorts will be enrolled sequentially. The initial participants in each dose cohort must be at least 8 years of age at the time of Screening. The study will include an optional open-label sub-study in participants <2 years of age at some sites. Treatment extension period was added to provide continued access to open label zilganersen for patients completing the main study and sub-study until the drug may be commercially available.