This is a Phase I/II, first-in-human, open-label study to evaluate the safety, tolerability, and preliminary efficacy signals in subjects with early manifest HD following treatment with one-time intracerebral bilateral injections of AB-1001 within the striatum (caudate and putamen).~This study consists of 2 parts: Dose-Finding Part and Expansion Part; each part consists of 3 phases: Screening Phase (8 weeks, with extension to 12 weeks to accommodate scheduling if needed), Treatment and Initial Follow-Up Phase (52 weeks) and Long-Term Follow-Up Phase (4 years). In the Dose-Finding Part, 2 dose titers will be tested in 3-6 subjects in each cohort. Once a dose is selected based on Dose-Limiting Toxicities, an additional 6 subjects will be enrolled into the Dose Expansion Part.
A Phase I/II Dose-Finding Study to Evaluate Striatal Administration of AB-1001 (previously BV-101) in Adults with Early Manifest Huntington's Disease