Quantitative Imaging of Brain Glymphatic Function in Humans
Purpose
Recent immunological and physiological studies have provided evidence in support of a central nervous system (CNS) lymphatic drainage system in vertebrate animals, and preliminary evidence has suggested that a similar system exists in humans. If operative, this system may have central relevance to many vascular and fluid clearance disorders such as stroke, multiple sclerosis, Parkinson's disease, and Alzheimer's disease related dementia (ADRD): diseases which represent some of the most pressing healthcare challenges of the 21st century. Evaluating this possibility will require improved, robust imaging methods sensitive to lymphatic drainage dysfunction; as such, the goal of this work is to apply novel magnetic resonance imaging approaches, optimized already for evaluating lymphatic circulation in patients with peripheral lymphatic dysfunction, to quantify relationships between physiological hallmarks of ADRD and CNS lymphatic function in humans.
Condition
- Parkinson Disease
Eligibility
- Eligible Ages
- Between 55 Years and 80 Years
- Eligible Genders
- All
- Accepts Healthy Volunteers
- Yes
Inclusion Criteria
- diagnosis of Parkinson's Disease or controls - willing to participate in PET and MRI imaging
Exclusion Criteria
- recent stimulant use - unstable diabetes - prior stroke - claustrophobia - prior cancer treatment with chemotherapy - history of traumatic brain injury - any unstable medical condition
Study Design
- Phase
- Early Phase 1
- Study Type
- Interventional
- Allocation
- N/A
- Intervention Model
- Single Group Assignment
- Intervention Model Description
- There is no masking in this protocol.
- Primary Purpose
- Basic Science
- Masking
- None (Open Label)
- Masking Description
- There is no masking in this protocol.
Arm Groups
| Arm | Description | Assigned Intervention |
|---|---|---|
|
Experimental Parkinson's Disease participants with MCI |
Patient volunteers will also undergo a C-11 PiB PET scan. This procedure utilizes a common radiotracer that is used routinely in clinical PET scans and will be purchased here from PETNET and certified for human use. All PET scans will be performed by a certified PET technologist at the Vanderbilt University Institute of Imaging Science. |
|
Recruiting Locations
Nashville, Tennessee 37212
More Details
- Status
- Recruiting
- Sponsor
- Vanderbilt University Medical Center
Detailed Description
The proposal involves magnetic resonance imaging (MRI) of healthy volunteers and patient volunteers suffering from Parkinson's disease. As part of the research study, volunteers will undergo 1-2 non-invasive MRI scans at a field strength of 3 Tesla. Each scan session will last 60-90 minutes, and will include the time when the volunteers will rehearse the experiment outside of the scanner, time for the volunteers and patients to be comfortably placed in the scanner, scanning, and finally time for the patients to slowly exit the scan room. All MRI methods are non-invasive and no exogenous contrast agents will be required. Patient volunteers will also undergo an C-11 PiB PET scan for Aim (2). This procedure utilizes a common radiotracer that is used routinely in clinical PET scans and will be purchased here from PETNET and certified for human use. All PET scans will be performed by a certified PET technologist at the Vanderbilt University Institute of Imaging Science. Finally, in Aim (3) of this study, measurements of glymphatic function will be performed before and during general anesthesia. Importantly, the general anesthesia will be administered as part of standard-of-care for clinically-indicated MRIs required for deep brain stimulation planning and electrode placement. Therefore, the intervention itself is not a research procedure. Additionally, the scan that will be performed, which is a modified diffusion tensor imaging (DTI) MRI approach, is already performed as part of this clinical protocol. Therefore, it is anticipated that the participant will not be sedated any longer than what would be required for clinical indication for this procedure. As such, while this study qualifies as a clinical trial by NIH criteria, it is expected to pose no more risk than what the participant will receive from their clinical standard-of-care procedure.