A Study to Evaluate Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of BIIB054 in Japanese Participants With Parkinson's Disease
Parkinson's Disease
About this trial
This is an interventional treatment trial for Parkinson's Disease
Eligibility Criteria
Key Inclusion Criteria:
- Diagnosed with PD within a maximum of 3 years prior to screening.
- Has not received levodopa or any other treatment for PD, herein referred to as symptomatic PD medication (including but, not limited to, dopamine agonists, amantadine, anticholinergics, monoamine oxidase type B (MAO-B) inhibitors, or safinamide) for at least 12 weeks prior to Day 1. Maximum total duration of prior PD regimens should not exceed 30 days.
- Score of less than equal to (<=) 2.5 on the Modified Hoehn and Yahr Scale.
- Screening dopamine transporter (DaT)/ single-photon emission computed tomography (SPECT) results consistent with neurodegenerative Parkinsonism (central reader).
Key Exclusion Criteria:
- Presence of freezing of gait.
- History of or positive test result at Screening for human immunodeficiency virus (HIV) or hepatitis C virus antibody (anti-HCV).
- Screening value for hemoglobin less than (<)12 gram per deciliter (g/dL) for men or <11 g/dL for women.
- Montreal Cognitive Assessment (MoCA) score <23 or other significant cognitive impairment or clinical dementia.
- History of any brain surgery for PD.
- Participation in any passive or active immunotherapy targeting alpha-synuclein or other PD-related protein.
NOTE: Other protocol defined Inclusion/Exclusion criteria may apply.
Sites / Locations
- Research Site
- Research Site
- Research Site
- Research Site
- Research Site
- Research Site
- Research Site
- Research Site
- Research Site
Arms of the Study
Arm 1
Arm 2
Arm 3
Arm 4
Experimental
Experimental
Experimental
Placebo Comparator
Cohort 1: BIIB054 Dose A
Cohort 2: BIIB054 Dose B
Cohort 3: BIIB054 Dose C
Cohorts 1-3: Placebo
Participants will receive IV infusion of BIIB054 Dose A (single infusion on Day 1 followed by an observation period; with subsequent doses for 48 weeks)
Participants will receive IV infusion of BIIB054 Dose B (single infusion on Day 1 followed by an observation period; with subsequent doses for 48 weeks)
Participants will receive IV infusion of BIIB054 Dose C (single infusion on Day 1 followed by an observation period; with subsequent doses for 48 weeks)
Participants will receive a single IV infusion of BIIB054 matching placebo (single infusion on Day 1 followed by an observation period; with subsequent doses for 48 weeks)