Den här översättningen är inte klar ännu. Den här sidan är just nu på engelska.

Gå till den engelska sidan

Parkinson's research gets a boost: 4,500 volunteers help map disease progression

NCT ID NCT04477785

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jul 28, 2026 · Updated 2 times

Summary

This observational study, led by the Michael J. Fox Foundation, aims to understand how Parkinson's disease progresses over time. It will follow 4,500 people, including those with Parkinson's, those at risk, and healthy volunteers, collecting clinical, imaging, and genetic data. The goal is to identify markers of progression that can be used in future trials to test treatments that might slow or stop the disease.

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 study could identify reliable markers of Parkinson's progression, enabling more effective clinical trials for treatments that slow the disease.
What could go wrong
This is an observational study, not a treatment trial, so no direct benefit to participants. Results depend on long-term follow-up and may not translate into immediate therapies.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 4,500 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jul 2020

Expected to finish

Dec 2033

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

In PPMI Clinical up to 4,500 participants will be enrolled and followed longitudinally from approximately 50-55 international clinical sites across a variety of cohorts, including healthy controls, Parkinson disease, PD manifesting gene carriers, and Prodromal (those at risk for developing PD).

Ages

30 years and older

Sex

Anyone

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

7.1 Healthy Controls (HC) Note: Active Healthy controls previously enrolled in PPMI do not require re-assessment of eligibility criteria listed below for enrollment in PPMI Clinical. Active participants do need to be able to provide informed consent for PPMI Clinical participation (includes use of a designated research proxy). 7.1.1 Inclusion Criteria (HC) 1. Male or female age 57 years or older at Screening visit. 2. Individuals taking any of the following drugs: alpha methyldopa, methylphenidate, amphetamine derivatives or modafinil, must be willing and medically able to hold the medication for at least 5 half-lives before SPECT imaging. 3. Confirmation that participant is eligible based on Screening SPECT imaging. 4. Able to provide informed consent. 5. Either is male, or is female and meets additional criteria below, as applicable: * Female of childbearing potential who is not pregnant, lactating, or planning pregnancy during the study and has a negative pregnancy test on day of Screening SPECT imaging test prior to injection of DaTscanTM. 7.1.2 Exclusion Criteria (HC) 1. First degree relative with PD (i.e., biologic parent, sibling, child). 2. Current or active clinically significant neurological disorder (in the opinion of the Investigator). 3. Previously obtained MRI scan with evidence of clinically significant neurological disorder (in the opinion of the Investigator). 4. Received any of the following drugs: dopamine receptor blockers (neuroleptics), metoclopramide and reserpine within 6 months of Screening visit. 5. Current treatment with anticoagulants (e.g., coumadin, heparin, oral thrombin inhibitors) that might preclude safe completion of the lumbar puncture. 6. Condition that precludes the safe performance of routine lumbar puncture, such as prohibitive lumbar spinal disease, bleeding diathesis, or clinically significant coagulopathy or thrombocytopenia. 7. Any other medical or psychiatric condition or lab abnormality, which in the opinion of the investigator might preclude participation. 8. Any other reason that, in the opinion of the investigator, would render the participant unsuitable for study enrollment. 7.2 Parkinson's Disease (PD) Note: Active PD participants previously enrolled in PPMI do not require re-assessment of eligibility criteria listed below for enrollment in PPMI Clinical. Active participants do need to be able to provide informed consent for PPMI Clinical participation (includes use of a designated research proxy). 7.2.1 Inclusion Criteria (PD) 1. Male or female age 30 years or older at Screening Visit. 2. A diagnosis of Parkinson's disease for 2 years or less at Screening Visit. 3. Not expected to require PD medication within at least 6 months from Baseline. 4. Patients must have at least two of the following: resting tremor, bradykinesia, rigidity (must have either resting tremor or bradykinesia); OR either asymmetric resting tremor or asymmetric bradykinesia. 5. Hoehn and Yahr stage I or II at Baseline. 6. Individuals taking any of the following drugs: alpha methyldopa, methylphenidate, amphetamine derivatives or modafinil, must be willing and medically able to hold the medication for at least 5 half-lives before SPECT imaging. 7. Confirmation that participant is eligible based on Screening SPECT imaging. 8. Able to provide informed consent. 9. Either is male, or is female and meets additional criteria below, as applicable: * Female of childbearing potential who is not pregnant, lactating, or planning pregnancy during the study and has a negative pregnancy test on day of Screening SPECT imaging test prior to injection of DaTscanTM. 7.2.2 Exclusion Criteria (PD) 1. Currently taking levodopa, dopamine agonists, MAO-B inhibitors, amantadine or another PD medication, except for low-dose treatment of restless leg syndrome (with permission of medical monitor). 2. Has taken levodopa, dopamine agonists, MAO-B inhibitors or amantadine within 60 days of Baseline visit. 3. Has taken levodopa or dopamine agonists prior to Baseline visit for more than a total of 90 days. 4. Atypical PD syndromes due to either drugs (e.g., metoclopramide, flunarizine, neuroleptics) or metabolic disorders (e.g., Wilson's disease), encephalitis, or degenerative diseases (e.g., progressive supranuclear palsy). 5. A clinical diagnosis of dementia as determined by the investigator. 6. Previously obtained MRI scan with evidence of clinically significant neurological disorder (in the opinion of the Investigator). 7. Received any of the following drugs: dopamine receptor blockers (neuroleptics), metoclopramide and reserpine within 6 months of Screening visit. 8. Current treatment with anticoagulants (e.g., coumadin, heparin, oral thrombin inhibitors) that might preclude safe completion of the lumbar puncture. 9. Condition that precludes the safe performance of routine lumbar puncture, such as prohibitive lumbar spinal disease, bleeding diathesis, or clinically significant coagulopathy or thrombocytopenia. 10. Any other medical or psychiatric condition or lab abnormality, which in the opinion of the investigator might preclude participation. 11. Any other reason that, in the opinion of the investigator, would render the participant unsuitable for study enrollment. 7.3 Parkinson's Disease (PD) with LRRK2 or GBA variant Note: Active PD participants previously enrolled in PPMI do not require re-assessment of eligibility criteria listed below for enrollment in PPMI Clinical. Active participants do need to be able to provide informed consent for PPMI Clinical participation (includes use of a designated research proxy). 7.3.1 Inclusion Criteria (PD ¬- LRRK2 or GBA) 1. Male or female age 30 years or older at Screening Visit. 2. A diagnosis of Parkinson's disease for 2 years or less at Screening Visit. 3. Patients must have at least two of the following: resting tremor, bradykinesia, rigidity (must have either resting tremor or bradykinesia); OR either asymmetric resting tremor or asymmetric bradykinesia. 4. Hoehn and Yahr stage I or II at Baseline. 5. Confirmation of causative LRRK2 or GBA (willingness to undergo genetic testing as part of genetic screening and be informed of genetic testing results, or approved documentation of prior genetic testing results). 6. Individuals taking any of the following drugs: alpha methyldopa, methylphenidate, amphetamine derivatives or modafinil, must be willing and medically able to hold the medication for at least 5 half-lives before SPECT imaging. 7. Confirmation that participant is eligible based on Screening SPECT imaging. 8. Able to provide informed consent. 9. Either is male, or is female and meets additional criteria below, as applicable: * Female of childbearing potential who is not pregnant, lactating, or planning pregnancy during the study and has a negative pregnancy test on day of Screening SPECT imaging test prior to injection of DaTscanTM. 7.3.2 Exclusion Criteria (PD - LRRK2 or GBA) 1. Received any of the following drugs: dopamine receptor blockers (neuroleptics), metoclopramide and reserpine within 6 months of Screening visit. 2. Current treatment with anticoagulants (e.g., coumadin, heparin) that might preclude safe completion of the lumbar puncture. 3. Condition that precludes the safe performance of routine lumbar puncture, such as prohibitive lumbar spinal disease, bleeding diathesis, or clinically significant coagulopathy or thrombocytopenia. 4. Any other medical or psychiatric condition or lab abnormality, which in the opinion of the investigator might preclude participation. 5. Any other reason that, in the opinion of the investigator, would render the participant unsuitable for study enrollment. 7.4 Parkinson's Disease (PD) with SNCA or rare genetic variant Note: Active PD participants previously enrolled in PPMI do not require re-assessment of eligibility criteria listed below for enrollment in PPMI clinical. Active participants do need to be able to provide informed consent for PPMI Clinical participation (includes use of a designated research proxy). 7.4.1 Inclusion Criteria (PD - SNCA or rare genetic variant (such as Parkin or Pink1)) 1. Male or female age 30 years or older at Screening Visit. 2. Parkinson's disease diagnosis at Screening Visit. 3. Patients must have at least two of the following: resting tremor, bradykinesia, rigidity (must have either resting tremor or bradykinesia); OR either asymmetric resting tremor or asymmetric bradykinesia. 4. Hoehn and Yahr stage I, II, or III at Baseline. 5. Confirmation of causative SNCA or rare genetic variant (such as Parkin or Pink1) (willingness to undergo genetic testing as part of genetic screening and be informed of genetic testing results, or approved documentation of prior genetic testing results). 6. Individuals taking any of the following drugs: alpha methyldopa, methylphenidate, amphetamine derivatives or modafinil, must be willing and medically able to hold the medication for at least 5 half-lives before SPECT imaging. 7. Confirmation that participant is eligible based on Screening SPECT imaging. 8. Able to provide informed consent. 9. Either is male, or is female and meets additional criteria below, as applicable: * Female of childbearing potential who is not pregnant, lactating, or planning pregnancy during the study and has a negative pregnancy test on day of Screening SPECT imaging test prior to injection of DaTscanTM. 7.4.2 Exclusion Criteria (PD - SNCA or rare genetic variant (such as Parkin or Pink1)) 1. Received any of the following drugs: dopamine receptor blockers (neuroleptics), metoclopramide and reserpine within 6 months of Screening visit. 2. Current treatment with anticoagulants (e.g., coumadin, heparin) that might preclude safe completion of the lumbar puncture. 3. Condition that precludes the safe performance of routine lumbar puncture, such as prohibitive lumbar spinal disease, bleeding diathesis, or clinically significant coagulopathy or thrombocytopenia. 4. Any other medical or psychiatric condition or lab abnormality, which in the opinion of the investigator might preclude participation. 5. Any other reason that, in the opinion of the investigator, would render the participant unsuitable for study enrollment. 7.5 Prodromal Note: Active Prodromal participants previously enrolled in PPMI do not require re-assessment of eligibility criteria listed below for enrollment in PPMI Clinical. Active participants do need to be able to provide informed consent for PPMI Clinical participation (includes use of a designated research proxy). The specific predictive eligibility criteria for participants recruited through PPMI Remote to advance to PPMI Clinical will be iteratively optimized based on data collected from these studies. 7.5.1 Inclusion criteria (Prodromal) For Screening: 1. Confirmation that participant is eligible based on centrally determined predictive criteria including the University of Pennsylvania Smell Identification Test (UPSIT). * For participants in PPMI Remote, referral to the clinical site confirms predictive eligibility. * For participants identified by the clinical site, predictive criteria are based on generalized risk such as first degree biologic relative, known risk of PD including RBD, or known genetic variants associated with PD risk. Additionally, confirmation of UPSIT eligibility during the Screening visit prior to SPECT Imaging. 2. Male or female age 60 years or older (except age 30 years or older for SNCA, or rare genetic variants (such as Parkin or Pink1) participants). 3. Individuals taking any of the following drugs: alpha methyldopa, methylphenidate, amphetamine derivatives or modafinil, must be willing and medically able to hold the medication for at least 5 half-lives before SPECT imaging. 4. Able to provide informed consent. 5. Either is male, or is female and meets additional criteria below, as applicable: • Female of childbearing potential who is not pregnant, lactating, or planning pregnancy during the study and has a negative pregnancy test on day of Screening SPECT imaging test prior to injection of DaTscanTM. For continuation to Baseline visit and ongoing follow-up: 6. Confirmation that participant is eligible based on \*Screening SPECT imaging. * Screening SPECT Imaging eligibility: Based on the results of the SPECT imaging test, Prodromal participants eligible to continue their participation in PPMI Clinical will be asked to return for their PPMI Clinical baseline visit. Neither the participant nor the site investigator will be made aware of the participant's DAT status during the study. * It is anticipated that approximately 6,000 participants will complete a screening visit to undergo DAT imaging. Approximately 2,000 participants will be eligible to continue their participation in PPMI Clinical (those not eligible to proceed will remain in PPMI Remote, as applicable). * All participants with DAT deficit will be eligible to continue their participation in PPMI Clinical. It is estimated that about 75% of eligible participants will have a DAT deficit (defined by a hybrid of visual assessment and quantitative striatal specific binding analysis). * Some participants without DAT deficit will also be eligible to continue their participation in PPMI Clinical. These participants will be chosen based on DAT binding that is reduced from age expected but it not outside the normal range and/or from individuals with high-risk of PD including RBD, LRRK2, GBA, SNCA, or rare genetic variants (such as Parkin or Pink1) that do not demonstrate DAT deficit. It is estimated that about 25% of eligible participants will not have a DAT deficit. * It is anticipated that approximately 30% of the PPMI Clinical prodromal participants with DAT deficit will phenoconvert to motor parkinsonism during a 3 to 5-year follow-up. 7.5.2 Exclusion Criteria (Prodromal) 1. Clinical diagnosis of PD at screening, other parkinsonism, or dementia. 2. Received any of the following drugs: dopamine receptor blockers (neuroleptics), metoclopramide and reserpine within 6 months of Baseline Visit. 3. Current treatment with anticoagulants (e.g. coumadin, heparin) that might preclude safe completion of the lumbar puncture. 4. Condition that precludes the safe performance of routine lumbar puncture, such as prohibitive lumbar spinal disease, bleeding diathesis, or clinically significant coagulopathy or thrombocytopenia. 5. Any other medical or psychiatric condition or lab abnormality, which in the opinion of the investigator might preclude participation. 6. Currently taking levodopa, dopamine agonists, MAO-B inhibitors, amantadine or another PD medication, except for low-dose treatment of restless leg syndrome (with permission of medical monitor). 7. Has taken levodopa, dopamine agonists, MAO-B inhibitors or amantadine within 60 days of Baseline visit. except for low-dose treatment of restless leg syndrome (with permission of medical monitor). 8. Any other reason that, in the opinion of the investigator, would render the participant unsuitable for study enrollment.

Get updates

Get notified about this study

Sign up to get updates when this study changes or when new studies for Parkinson disease are added.

Vår säkerhetsrekommendation!

Genom att skicka in godkänner du våra Användarvillkor

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.

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The study's own enquiry address

    This study publishes an address for enquiries. See it below .

  2. The places running it

    50 sites in 12 countries. The list below names each one and where it is.

  3. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  4. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Banner Research Institute

    RECRUITING

    Sun City, Arizona, 85351, United States

  • Barrow Neurological Institute

    RECRUITING

    Phoenix, Arizona, 85013, United States

  • Baylor College of Medicine

    RECRUITING

    Houston, Texas, 77030, United States

  • Beth Israel Medical Center

    RECRUITING

    New York, New York, 10003, United States

  • Boston University

    RECRUITING

    Boston, Massachusetts, 02118, United States

  • Cleveland Clinic

    RECRUITING

    Cleveland, Ohio, 44195, United States

  • Cleveland Clinic Lou Ruvo Center for Brain Health

    RECRUITING

    Las Vegas, Nevada, 89106, United States

  • Emory University School of Medicine

    RECRUITING

    Atlanta, Georgia, 30329, United States

  • Foundation for Biomedical Research of the Academy of Athens

    RECRUITING

    Athens, Athens, 11523, Greece

  • Hospital Clinic de Barcelona

    RECRUITING

    Barcelona, Barcelona, 08036, Spain

  • Hospital Donostia

    RECRUITING

    Donostia / San Sebastian, San Sebastian, 20014, Spain

  • Imperial College London

    RECRUITING

    London, W12 0NN, United Kingdom

  • Innsbruck Medical University

    RECRUITING

    Innsbruck, 6020, Austria

  • Institute For Neurodegenerative Disorders

    RECRUITING

    New Haven, Connecticut, 06510, United States

  • John Radcliffe Hospital Oxford and Oxford University

    RECRUITING

    Oxford, Oxford, OX3 9DU, United Kingdom

  • Johns Hopkins University

    RECRUITING

    Baltimore, Maryland, 21287, United States

  • Keck School of Medicine of USC

    RECRUITING

    Los Angeles, California, 90033, United States

  • Lagos College of Medicine, University of Lagos

    RECRUITING

    Lagos, Lagos, 121010, Nigeria

  • Massachusetts General Hospital

    RECRUITING

    Boston, Massachusetts, 02446, United States

  • Mayo Foundation for Medical Education and Research

    RECRUITING

    Scottsdale, Arizona, 85259, United States

  • McGill University

    RECRUITING

    Montreal, Quebec, H3A2B4, Canada

  • NYU Langone Health

    RECRUITING

    New York, New York, 10017, United States

  • Newcastle University

    RECRUITING

    Newcastle upon Tyne, Tyne and Wear, NE45PL, United Kingdom

  • Northwestern University

    RECRUITING

    Chicago, Illinois, 60611, United States

  • Oregon Health &Science University

    RECRUITING

    Portland, Oregon, 97239, United States

  • Paracelsus-Elena Klinik

    RECRUITING

    Kassel, 34128, Germany

  • Parkinson Research Clinic

    RECRUITING

    Luxembourg, L-1257, Luxembourg

  • Parkinson's Disease& Movement Disorder Center of Boca Raton

    RECRUITING

    Boca Raton, Florida, 33486, United States

  • Philipps-University of Marburg

    RECRUITING

    Hessen, 35043, Germany

  • Queen Mary University of London

    RECRUITING

    London, Britain, EC1M 6BQ, United Kingdom

  • Radboud University

    RECRUITING

    Nijmegen, Gelderland, 6525 GC, Netherlands

    Contact Email: •••••@•••••

  • Tel Aviv Sourasky Medical Center

    RECRUITING

    Tel Aviv, Tel Aviv, 64239, Israel

  • The Ottawa Hospital - Civic Campus

    RECRUITING

    Ottawa, Ontario, K1Y 4E9, Canada

  • Toronto Western Hospital

    RECRUITING

    Toronto, Ontario, M5T 2S8, Canada

  • Univ of Washington and VA Puget Sound Health Care System

    RECRUITING

    Seattle, Washington, 98104, United States

  • University of Alabama at Birmingham

    RECRUITING

    Birmingham, Alabama, 35294, United States

  • University of California San Diego

    RECRUITING

    La Jolla, California, 92093-0948, United States

    Contact Email: •••••@•••••

  • University of California, San Francisco

    RECRUITING

    San Francisco, California, 94115, United States

  • University of Cincinnati/Cincinnati Children's Hospital

    RECRUITING

    Cincinnati, Ohio, 45219, United States

  • University of Colorado Anschutz Medical Campus

    RECRUITING

    Aurora, Colorado, 80045, United States

  • University of Florida

    RECRUITING

    Gainesville, Florida, 32608, United States

  • University of Kansas Medical Center

    RECRUITING

    Kansas City, Kansas, 66160, United States

  • University of Luebeck

    RECRUITING

    Lübeck, 23562, Germany

  • University of Michigan

    RECRUITING

    Ann Arbor, Michigan, 48109, United States

  • University of Pennsylvania

    RECRUITING

    Philadelphia, Pennsylvania, 19107, United States

  • University of Pittsburgh

    RECRUITING

    Pittsburgh, Pennsylvania, 15213, United States

  • University of Rochester

    RECRUITING

    Rochester, New York, 14620, United States

  • University of Salerno

    RECRUITING

    Salerno, Salerno, 84131, Italy

  • University of South Florida

    RECRUITING

    Tampa, Florida, 33606, United States

  • University of Tuebingen

    RECRUITING

    Tübingen, 72076, Germany

More trials for these conditions

Other studies related to the condition(s) this trial covers.