Brain scans reveal clues about Parkinson's and serotonin
NCT ID NCT05916625
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This completed study examined how a specific serotonin receptor (5-HT4) is expressed in the brains of people with mild to moderate Parkinson's disease compared to healthy older adults. Researchers used PET scans and a special tracer to measure receptor levels, alongside cognitive and motor tests. The goal was to better understand how changes in this receptor relate to both movement and non-movement symptoms. No treatment was given; it was purely an observational imaging study.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
What this could lead to
If successful, this could help researchers better understand the role of serotonin receptors in Parkinson's disease, potentially pointing toward new targets for symptom management.
What could go wrong
This is an early exploratory study with only 40 participants, so results may not apply to all Parkinson's patients. It does not test any treatment, so no direct benefit is expected.
Disclaimer
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the original study
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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CERMEP
Bron, 69500, France
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Hôpital des Charpennes Centre de Recherche Clinique "Vieillissement-Cerveau-Fragilité"
Lyon, France