Study J3Z-MC-OJAA is a Phase 1/2a, multicenter, open-label, ascending dose, first in-human study that will evaluate the safety of intracisternal LY3884961 administration in patients with moderate to severe Parkinson's disease with at least 1 pathogenic GBA1 mutation. Two dose level cohorts of LY3884961 are planned (Dose Level 1 and Dose Level 2). The duration of the study is 5 years. During the first year, patients will be evaluated for the effect of LY3884961 on safety, tolerability, immunogenicity, biomarkers, and clinical efficacy measures. Patients will continue to be followed for an additional 4 years to continue to monitor safety as well as selected biomarker and efficacy measures.
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Cumulative number of Treatment-Emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs)
Timeframe: 5 years
Incidence of procedure or treatment-emergent AEs measured by brain MRI, spine MRI and nerve conduction study (NCS)
Timeframe: 5 years
Treatment emergent immunogenicity of AAV9 in blood
Timeframe: Thru month 24
Change from baseline in immunogenicity of AAV9 in blood
Timeframe: Baseline and Month 24
Treatment emergent immunogenicity of GCase in blood
Timeframe: Thru Month 24
Change from baseline in immunogenicity of GCase in blood
Timeframe: Baseline and Months 24
Treatment emergent immunogenicity of Nfl in blood
Timeframe: Thru Month 24
Change from baseline in immunogenicity of Nfl in blood
Timeframe: Baseline and Month 24
Treatment emergent immunogenicity of AAV9 in CSF
Timeframe: Thru Month 24
Change in immunogenicity of AAV9 in CSF
Timeframe: Baseline and Month 12
Treatment emergent immunogenicity of GCase in CSF
Timeframe: Thru Month 24
Change in immunogenicity of GCase in CSF
Timeframe: Baseline, and Months 12