Observational Study: Colonoscopy for Parkinson's Disease Detection

This study is looking into a new way to detect Parkinson's disease earlier. Doctors are trying to find a protein called alpha-synuclein in small tissue samples taken from your colon during a routine colonoscopy. Currently, Parkinson's is diagnosed based on symptoms like tremors, but by then the disease has already progressed. Finding a way to detect it sooner could help doctors start treatments earlier. You can join if you are 40-99 years old, have a confirmed Parkinson's diagnosis, and are already scheduled for a routine colonoscopy for colon cancer screening or other medical reasons. The main goal is to see if this protein can be found in your colon tissue at the time of your colonoscopy.

Study design
This is an observational study with 20 participants. It aims to see if a specific protein can be detected in colon tissue samples.
What's involved
You will complete questionnaires, take a smell test, and provide a stool sample before your colonoscopy. During your routine colonoscopy, doctors will take 4 additional small tissue samples from your colon.
Compensation
Not stated in the trial record.
Follow-up
Detection of the protein is measured at the time of the colonoscopy procedure.

AI-generated from the public study record. Only the study team can confirm whether you're eligible — confirm details with them before making decisions.

NCT07204652

Colonoscopic Detection of Phosphorylated Alpha-synuclein for Parkinson's Diagnosis

Recruiting
Not specifiedAges 40–99Observational
CND Life Sciences
~20 participants
Updated 2026-02-11 on ClinicalTrials.gov
What's tested:No Intervention: Observational Cohort

At a glance

Recruiting sites
1 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Detection of phosphorylated alpha-synuclein in colon tissue samples
Measured over At time of colonoscopy procedure
PARKINSON DISEASE (Disorder)
Parkinson
Parkinson's Disease and Parkinsonism
Parkinson Disease

NCT07204652

Where you'd take part

This study runs at 1 site. They're the same protocol — you choose where, and that choice sets who your contact draft is addressed to.

  • Oregon Health & Science University

    Portland, Oregonstudy coordinator listed

    Recruiting

Sites open and close at different times, so the status above is per site — it can differ from the study's overall status.

  • Delaram Safarpour, MD, MSCE, FAAN · PRINCIPAL_INVESTIGATOR · Oregon Health and Science University

Opens a ready-to-send draft in your own email app — review before sending.

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Eligibility criteria

Inclusion

Adults 40 to 99 years of age
Patients with a confirmed clinical diagnosis of Parkinson's disease by UKPDS Brain Bank Criteria
Patients who have agreed to undergo a routine colonoscopy as part of their surveillance for colon cancer or exclusion of other gastrointestinal diseases

Exclusion

Use of anticoagulants (Plavix 75 mg or aspirin up to 325 mg alone is allowed)
History of colon cancer
Recent gastrointestinal illness or surgical procedures
Pregnant or planning to become pregnant before the scheduled colonoscopy
Significant cognitive impairment, as determined by study investigators
Decisionally impaired adults who cannot express understanding that this study is voluntary and for research purposes
  • Detection of phosphorylated alpha-synuclein in colon tissue samplesAt time of colonoscopy procedure