Adult participants with spinocerebellar ataxia type 2 (SCA2) who carry ≥33 cytosine, adenine, guanine (CAG) repeats in the ATXN2 gene, and who have met all protocol eligibility criteria will be randomized to receive a single dose of ARO-ATXN2 or placebo and be evaluated for safety, tolerability, pharmacokinetic (PK) and pharmacodynamic (PD) parameters.
Phase 1 trials primarily test safety and dosing in a small number of participants (typically 20–100). Results do not yet speak to efficacy. FDA approval is typically many years away from this stage.
Currently recruiting: the trial is enrolling patients. A data readout is not expected until after enrollment closes and the follow-up period is complete.
Arrowhead Pharmaceuticals (ARWR) is the sponsoring company for this trial. BiotechSign currently grades this company D (36/100) based on composite catalyst signals across its full pipeline. This trial is one data point in that overall catalyst picture.