Entacapone

The purpose of this study is to investigate the use of ultra-low, anti-inflammatory doses of radiation therapy (RT) for the treatment of Parkinson's Disease (PD). In this study, the TrueBeam LINAC utilizes a linear accelerator (LINAC) for the delivery of radiation therapy. Dynamic conformal arc (DCA) therapy will be used to deliver a total of five (5) once-a-day radiation treatments (RT) using DaT-SPECT (Dopamine Transporter-Single-Photon Emission Computed Tomography) and MRI imaging to guide radiation treatment planning.

This study aims to evaluate the efficacy of community-based early detection and targeted interventions, including stem cell therapy and wearable non-invasive brain-computer interface (BCI) devices, for Mild Cognitive Impairment (MCI) in adults aged 55 years and older residing in U.S. urban and suburban communities. Primary objectives include assessing improvements in MCI detection rates, cognitive outcomes, and progression delay compared to standard care.

The purpose of this study is to evaluate the efficacy, safety, and pharmacokinetics (PK) of prasinezumab compared with placebo in participants with early-stage Parkinson's disease (PD) on stable symptomatic monotherapy with levodopa.

The study aims to evaluate the burden of tau pathology in people with Sporadic and LRRK2 PD via in vivo imaging using the tau tracer, \[18F\]PI-2620, and a high resolution PET camera, NeuroEXPLORER.

The Goal of this study is to evaluate the safety, tolerability, and clinical responses following implantation of DSP-1083. Study enrolls both male and female patients in 2 cohorts. This study will be held in approximately 5-8 study sites in United States

The investigators propose a Phase I single surgical-center, double-blinded randomized parallel clinical trial involving bilateral autologous peripheral nerve tissue (PNT) delivery into the NBM or the alternate target also affecting cognition in this population, the substantia nigra (SN), to address "repair cell" support of these areas. Twenty-four participants with idiopathic Parkinson's Disease (PD) who have selected, qualified and agreed to receive as standard of care deep brain stimulation (DBS) will be enrolled and randomly allocated to receive bilateral PNT deployment to either the NBM or SN at the time of DBS surgery. Participants will be allocated equally among both assignments over the course of three years (8 Year 1, 10 Year 2, 6 Year 3). Participants will be evaluated for neurocognitive, motoric function, activities of daily living, and quality of life at enrollment before surgery, two-weeks after surgery, and 6, 12, and 24 months after surgery.

The purpose of this study is to evaluate the safety, tolerability, and PK/PD of LY3962681 in healthy volunteers and patients with Parkinson's disease. The study will be comprised of two parts, the Single Ascending Dose (SAD) study and the Multiple Ascending Doses (MAD) study. During the SAD portion of the study, healthy volunteers will receive a single dose of LY3962681 or placebo (artificial cerebrospinal fluid (aCSF), no active drug) given into the spinal fluid. During the MAD portion of the study, patients with Parkinson's disease will receive two doses of either LY3962681 or placebo (aCSF) administered into the spinal fluid. * The treatment period in the SAD study will be 1 day. The treatment period in the MAD study will be 2 days, 12 to 24 weeks apart. * The follow-up period in the SAD study will be up to 52 weeks. The follow-up period in the MAD study will be up to 52 weeks post Dose 2.

More than 110,000 US Veterans living with Parkinson's disease (PD) currently receive PD-related care and services from the VA. Fall prevention is a priority for Veterans living PD. Gait disturbances are a major cause for functional dependence and the largest risk factor for falls, institutionalization, and death in PD. This SPiRE addresses the need to advance nonpharmacological rehabilitative health care of Veterans and maximizing functional outcomes by developing a non-invasive, neuromodulatory transcutaneous cervical Vagal Nerve Stimulation as an at-home intervention to improve gait and balance. This pilot clinical trial will assist with future efforts and priorities of the VA to prolong independent living and quality of life by minimizing gait and balance dysfunction experienced by Veterans living with PD.

Investigation of tenapanor as a potential treatment for synucleinopathy-associated constipation

Parkinson's disease (PD) is a devastating illness that has a growing impact on Veterans. One of the most disabling symptoms is depression, which is common in PD and linked to poor quality of life and higher risk of suicide. Unfortunately, there is a lack of effective treatments for depression in PD. Ketamine, which has rapid and potent antidepressant effects, is a potential option but has not been tested in Veterans with PD. Studies in rodents show that ketamine may not only improve depression in PD, it may target two of the underlying drivers of the disease: (1) reduced neuroplasticity, or the brain's ability to adapt and remodel itself; and (2) elevated inflammation. The investigators are conducting a randomized, placebo-controlled study to examine if a dose of intravenous (IV) ketamine improves depression in Veterans with PD. The investigators will also examine ketamine's effects on neuroplasticity and inflammation, which will help us understand how ketamine works in PD and if it can be a useful treatment for Veterans with the disease. This study will lay groundwork for a larger clinical trial across multiple VA sites.

The overall goal of the proposed research is to evaluate the use of \[11C\]SY08 as a PET radiotracer for aggregated alpha synuclein (αS) in individuals with Parkinson's disease (PD), Multiple system atrophy (MSA), Dementia with Lewy Bodies (DLB) and healthy controls. The purpose of this study is to evaluate the use of \[11C\]SY08 as a PET radiotracer for αS fibrils in individuals with PD, MSA, DLB and healthy controls. The specific aims of the current study are: 1. To determine brain uptake, distribution, and kinetics of \[11C\]SY08 in healthy individuals. 2. To determine brain uptake, distribution, and kinetics of \[11C\]SY08 in patients with alpha synuclein aggregates in the brain, including PD, DLB and MSA. 3. To determine human dosimetry of \[11C\]SY08 in healthy individuals An intravenous bolus injection of \[11C\]SY08 will be administered per subject for brain PET imaging.

Physical therapy approaches for balance and walking deficits in Parkinson's disease (PD) have limited effectiveness, with mostly short-lasting benefits. An exoskeleton is a device that straps to the legs and provides a passive force to assist people to better ambulate. The goal of this study is to establish the feasibility and safety of a lightweight exoskeleton on mobility and fall reduction in people with PD. As most PD patients eventually require assistive mobility devices, the exoskeleton represents a new option for increased, mobility, quality of life, and independence. Qualified subjects will come to the clinic twice weekly for eight weeks (16 total visits) and wear the exoskeleton device while walking under the supervision of a trained kinesiotherapist. Study staff will also interview participants and assess their PD symptoms, quality of life, and overall mobility. This study hopes to establish exoskeletons as modern, standard of care devices, which allow people with PD to maintain more independent and productive lives.