Linking Tau PET to Medial Temporal Lobe Subregions With High Resolution MRI

September 15, 2026 updated by: University of Pennsylvania
The investigators will conduct a tau PET scan in cognitively normal older adults and patients with Mild Cognitive Impairment (MCI), enrolled in the National Alzheimer's Coordinating Center (NACC) study at the University of Pennsylvania's Penn Memory Center/Alzheimer's Disease Core Center (PMC/ADC).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This is a cross-sectional and longitudinal study using the radiotracer [18F]-PI-2620 to determine the relationship of tau pathology to both cross-sectional and longitudinal clinical and biomarker data of NACC cohort participants who are Cognitively Normal or MCI. All subjects will already be part of the longitudinal cohort study, known as the "NACC" cohort, of the PMC/ADC (protocol 068200). Participants will provide informed consent for this protocol before beginning any study procedures. After screening assessments, participants will undergo PET scan imaging with [18F]PI-2620. There will be one follow-up [18F]PI-2620 PET scan approximately 18 +/- 6 months after bas eline scan.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
150

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • United States
    • Pennsylvania
      • Philadelphia, Pennsylvania, United States, 19104
        • University of Pennsylvania, School of Medicine

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

56 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Adults cognitively normal or Mild Cognitive Impairment (MCI) or Alzheimer's Disease.

Description

Inclusion Criteria:

  • Males and females ≥ 60 years of age.
  • Part of the NACC longitudinal cohort (IRB# 068200) of the PMC/ADCC with consensus conference designation of cognitively normal or Mild Cognitive Impairment (MCI) or Alzheimer's Disease (AD) Possible or Probable.
  • NACC longitudinal visit completed or scheduled within 6 months before or after enrollment in this study.
  • Women must be post-menopausal or surgically sterile.
  • An amyloid PET scan, completed as a part of the NACC protocol (IRB# 825943), must be performed or scheduled within 12 months before or after the [18F]PI-2620 PET scan.
  • A brain MRI, completed as a part of NACC protocol (IRB# 068200), must be performed or scheduled within 6 months before or after the [18F]PI-2620 PET scan. Scan should be of adequate research quality, including 3 Tesla and/or 7 Tesla high-resolution imaging of MTL structure.

Exclusion Criteria:

  • Have any medical or psychiatric conditions that, in the opinion of the investigator, would compromise the subject's safety or successful participation in the study.
  • Have evidence of structural abnormalities such as major stroke or mass on MRI that is likely to interfere with analysis of the PET scan.
  • Inability to tolerate or contraindication to imaging procedures in the opinion of an investigator or treating physician.
  • Have a history of significant or ongoing alcohol abuse or substance abuse or dependence based on medical record review or self-reported.

The inclusion / exclusion criteria will be ascertained through self-report in conjunction with any medical history available through the participant's medical or research records (EPIC or the ADC database)

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Observational Models: Cohort
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Cognitively Normal Older Adults
Subjects will receive an IV bolus injection of approximately 5 mCi ± 20% of [18F]PI-2620. All subjects will undergo a 30-minute brain PET/CT scan performed starting at approximately 45 minutes' post injection of [18F]PI-2620. A low-dose CT scan will be acquired according to standard PET/CT imaging procedures to be used for attenuation correction. All images will be reconstructed using standard reconstruction techniques
Drug: 2-(2-([18F]fluoro)pyridin-4-yl)-9H-pyrrolo[2,3-b:4,5-c']dipyridine
A small molecule aimed for binding and PET-imaging of aggregated tau protein in the human brain.
Other Names:
  • [18F]PI-2620
Mild Cognitively Impaired Older Adults or Older Adults with Alzheimer's Disease
Subjects will receive an IV bolus injection of approximately 5 mCi ± 20% of [18F]PI-2620. All subjects will undergo a 30-minute brain PET/CT scan performed starting at approximately 45 minutes' post injection of [18F]PI-2620. A low-dose CT scan will be acquired according to standard PET/CT imaging procedures to be used for attenuation correction. All images will be reconstructed using standard reconstruction techniques
Drug: 2-(2-([18F]fluoro)pyridin-4-yl)-9H-pyrrolo[2,3-b:4,5-c']dipyridine
A small molecule aimed for binding and PET-imaging of aggregated tau protein in the human brain.
Other Names:
  • [18F]PI-2620

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Correlation between PI-2620 SUVR and MTL subregion thickness
Time Frame: Baseline
Correlation between cross-sectional PI-2620 standard uptake value ratio (SUVR) and MTL subregion thickness (mm) in both controls and MCI/AD.
Baseline
Interaction between PI-2620 SUVR and amyloid status prediction of MTL subregion thickness
Time Frame: Baseline
Interaction between cross-sectional PI-2620 standard uptake value ratio (SUVR) and amyloid status for prediction of MTL subregion thickness (mm) in both controls and MCI/AD.
Baseline
Correlation between longitudinal PI-2620 SUVR and MTL subregion thickness
Time Frame: 18-24 months
Correlation between longitudinal PI-2620 standard uptake value ratio (SUVR) and MTL subregion thickness (mm) in both controls and MCI/AD.
18-24 months
Interaction between longitudinal PI-2620 SUVR and amyloid status for prediction of MTL subregion thickness
Time Frame: 18-24 months
Interaction between longitudinal PI-2620 standard uptake value ratio (SUVR) and amyloid status for prediction of MTL subregion thickness (% annual change) in both controls and MCI/AD.
18-24 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University of Pennsylvania

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
National Institutes of Health (NIH)

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: David Wolk, MD, University of Pennsylvania

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
March 11, 2020

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
January 1, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 1, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
January 3, 2020

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
January 29, 2020

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
January 31, 2020

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 16, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 15, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 833864

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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