Non-drug Treatment Study in Parkinson's Disease Patients and Healthy Volunteers to Collect Biological Samples in Order to Assess ex Vivo the Activity of Candidate Therapies and Develop Novel Analytical Methods for Biomarkers

This study will allow researchers to assess the potency of investigational LRRK2 inhibitors, outside of participant bodies. It will enroll Parkinson's disease patients (LRRK2 G2019S symptomatic carriers and idiopathic) and healthy volunteers meeting eligibility criteria. The study will consist of a maximum of two study visits, a selection visit to check eligibility criteria, and a sample collection visit. The two visits can take place on the same day or can occur within 14 days of each other. Participants will be assigned to Cohort A or Cohort B, each include a blood sample collection, and an optional cerebrospinal fluid (CSF) collection in Cohort A. No investigational product, study drug, will be administered to study participants.

Inclusion criteria

• Women of childbearing potential (WOCBP) must have a negative pregnancy test
• Parkinson's disease (PD) patients must be at least 40 years old
• Healthy volunteers must be at least 30 years old
• PD patients must have a PD diagnosis, according to the 2015 Movement Disorder Society criteria, with bradykinesia, and at least one of the following: muscular rigidity, or resting tremor with no other suspected cause of Parkinsonism
• The LRRK2 G2019S symptomatic carrier PD patients must have a documented G2019S mutation on the leucine-rich repeat kinase 2 gene (LRRK2)

Exclusion criteria

• Pregnant or lactating women
• Have participated in an investigational drug trial within 30 days
• Are SARS-CoV-2, COVID-19, positive within 15 days prior to blood sample collection
• Have another active disease that the investigator believes could interfere with study results