No Placebo Group
Every participant receives an active treatment — no one gets a placebo.
Healthy Volunteers Welcome
You do not need to have the condition being studied to take part.
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Review the details below, then apply to join this clinical trial.
At a Glance
Age
18 and older
Sex
Any
Trial phase
Phase 1
Study type
Interventional
Purpose
Basic Science
Participants needed
40 (estimated)
Sponsor
Daniel Claassen · Other
Who this trial is looking for
This trial is looking for adults with autonomic failure or related conditions. Participants will help researchers understand changes in brain function using a special imaging technique.
Are You a Good Fit for This Trial?
You may be able to join if
I have been diagnosed with pure autonomic failure.
I have autonomic failure and possible Parkinson's disease, MSA, or DLB.
I am a healthy adult aged 18 or older.
I have had a clinical exam confirming my condition.
You may not be able to join if
I have any type of bioimplant that is mechanical or electronic.
I have a ferromagnetic bioimplant that could be displaced.
I have cerebral aneurysm clips.
I may have shrapnel embedded in my body.
I am pregnant.
I am under 18 years old.
I cannot give informed written consent.
I have a mental ability that limits my ability to communicate.
Summarized in plain language from this trial's official eligibility criteria.
The full criteria are further down this page — only the research team can
confirm whether you qualify.
Think this trial could be right for you?
Answer three quick questions written from this study's own rules to see if you may qualify. No account needed to find out.
Alpha-synucleinopathies refer to age-related neurodegenerative and dementing disorders, characterized by the accumulation of alpha-synuclein in neurons and/or glia. The anatomical location of alpha-synuclein inclusions (Lewy Bodies) and the pattern of progressive neuronal death (e.g. caudal to rostral brainstem) give rise to distinct neurological phenotypes, including Parkinson's disease (PD), Mul…
Alpha-synucleinopathies refer to age-related neurodegenerative and dementing disorders, characterized by the accumulation of alpha-synuclein in neurons and/or glia. The anatomical location of alpha-synuclein inclusions (Lewy Bodies) and the pattern of progressive neuronal death (e.g. caudal to rostral brainstem) give rise to distinct neurological phenotypes, including Parkinson's disease (PD), Multiple System Atrophy (MSA), Dementia with Lewy Bodies (DLB). Common to these disorders are the involvement of the central and peripheral autonomic nervous system, where Pure Autonomic Failure (PAF) is thought (a) to be restricted to the peripheral autonomic system, and (b) a clinical risk factor for the development of a central synucleinopathy, and (c) an ideal model to assess biomarkers that predict phenoconversion to PD, MSA, or DLB. Such biomarkers would aid in clinical trial inclusion criteria to ensure assessments of disease- modifying strategies to, delay, or halt, the neurodegenerative process. One of these biomarkers may be related to the neurotransmitter dopamine (DA) and related changes in the substantia nigra (SN) and brainstem. \[18F\]F-DOPA is a radiolabeled substrate for aromatic amino acid decarboxylase (AAADC), an enzyme involved in the production of dopamine. Use of this radiolabeled substrate in positron emission tomography (PET) may provide insight to changes in monoamine production and how they relate to specific phenoconversions in PAF patients. Overall, this study aims to identify changes in dopamine production in key regions including the SN, locus coeruleus, and brainstem to distinguish between patients with PD, MSA, and DLB, which may provide vital information to predict conversion from peripheral to central nervous system disease.
Trial Locations
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Eligibility Criteria
Inclusion Criteria:
1. Patients with a diagnosis if pure autonomic failure
2. Patients with autonomic failure and possible PD, MSA, or DLB
3. Healthy adults aged 18 and above
4. Clinical exam confirming clinical designation
Exclusion Criteria:
* Subjects who have any type of bioimplant activated …
Inclusion Criteria:
1. Patients with a diagnosis if pure autonomic failure
2. Patients with autonomic failure and possible PD, MSA, or DLB
3. Healthy adults aged 18 and above
4. Clinical exam confirming clinical designation
Exclusion Criteria:
* Subjects who have any type of bioimplant activated by mechanical, electronic, or magnetic means (e.g., cochlear implants, pacemakers, neurostimulators, biostimulators, electronic infusion pumps, etc.), because such devices may be displaced or malfunction.
* Subjects who have any type of ferromagnetic bioimplant that could potentially be displaced.
* Subjects who have cerebral aneurysm clips.
* Subjects who may have shrapnel imbedded in their bodies (such as from war wounds), metal workers and machinists (potential for metallic fragments in or near the eyes).
* Subjects who are pregnant, because the effects of high field MRI on fetuses are not yet known.
* Minors (younger than 18 years)
Also excluded are subjects incapable of giving informed written consent:
* Subjects who cannot adhere to the experimental protocols for any reason, or have an inability to communicate with the researcher.
* Subjects who have limited mental ability to give informed consent, mentally retarded, altered mental status, mental disability, confusion, or psychiatric disorders.
* Prisoners
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