VY-AADC02 for Parkinson's Disease With Motor Fluctuations

Key Inclusion Criteria:

1. Males and females, 40 to 75 years of age (inclusive).

2. Diagnosis of PD, consistent with United Kingdom Brain Bank Criteria.

3. Unequivocal responsiveness to dopaminergic therapy, as judged by the Investigator.

4. Disease duration from diagnosis of ≥4 years.

5. In the judgment of the Investigator, a stable, optimal regimen of Parkinson's
medications for at least 4 weeks prior to screening evaluation.

6. Stable cognitive and psychological function based on screening evaluations.

7. In the judgment of the Investigator, stable Parkinson's features and symptoms for at
least 4 weeks prior to screening evaluation.

8. Agrees to defer any neurological surgery, including deep brain stimulation, other
invasive treatments for PD including duodopa, or the addition of new dopaminergic
formulations until after completing the 12-month study visit.

9. Ability to travel to study visits.

Key Exclusion Criteria:

1. Atypical or secondary parkinsonism, including but not limited to symptoms believed to
be due to trauma, brain tumor, infection, cerebrovascular disease, other neurological
disease, or to drugs, chemicals, or toxins, as determined by the Investigator.

2. MoCA score <26.

3. Use of tetrahydrocannabinol within 6 months of screening evaluation.

4. Brain imaging abnormalities in the striatum or other regions that would substantially
increase risk of surgery.

5. Contraindication to MRI and/or gadolinium-based contrast agents.

6. Prior brain surgery or infusion therapies that could complicate the study procedure or
negatively impact study evaluations as determined from participant interview,
screening MRI, or medical records.

7. History of malignancy other than treated carcinoma in situ within 3 years of screening
evaluation.

8. Prior gene transfer, current treatment with any investigational agent (drug or device)
within 2 months of screening evaluation, or participation or plans to participate in
another research study.

9. Ongoing treatments or planned treatments that might interfere with interpretation of
the study outcome including deep brain stimulation.