ClinicalTrials.gg
Enrolling by invitationNCT02414178AV ADADUpdated Jun 9, 2026

F 18 T807 Tau PET Imaging in Dominantly Inherited Alzheimer's Network (DIAN Project)

An observational study in Alzheimer Disease, sponsored by Washington University School of Medicine. Enrolling by invitation at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-06-09.

Sponsored by Washington University School of Medicine · Observational

Study type
Observational
Model
Other
Time perspective
Prospective
Enrollment
130
Ages
18 Years and older
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-12

Among 25 studies in Alzheimer Disease by Washington University School of Medicine — 8 open to participants now, 15 under way, 5 of them phase 3. Alzheimer Disease · Washington University School of Medicine.

Planned enrollment
5th of 11
130 · median 96
Started
2021
with 3 others
Observational
10 of 25
5 open now
Primary completion
2027-01
later than 3 of 14 live
Registered
4th of 25
by date

Among the 25 studies in Alzheimer Disease by Washington University School of Medicine, this one is the 5th largest by planned enrollment of the 11 observational ones, is one of 4 that started in 2021, is one of 10 observational ones, reaches primary completion later than 3 of the 14 other live ones, and was the 4th registered.

By phase

25 studies; the count open now beside each. This study's row is marked.

Observationalthis study10 · 5 open
Phase 2/36 · 2 open
No phase5 · 1 open
Other kind1 · 0 open
Phase 11 · 0 open
Phase 21 · 0 open
Phase 31 · 0 open

By the year they started

First in 2009; this study’s year is marked. 4 started in 2021.

Size and results

Median enrollment 232 across the 14 interventional studies, 96 across the 11 observational. Of the 10 that completed or were terminated, 4 (40%) have results posted.

Watch this landscapeDownload CSVWith an account: a weekly mail of what changed among 25 studies in Alzheimer Disease by Washington University School of Medicine, or all of them as a file.
02

Study summary

The purpose of this research study is to evaluate a new radioactive compound used in positron emission tomography (PET) scans in identifying tau tangles (a certain protein that might be associated with Dominantly Inherited Alzheimer's Disease) in the brain, and if the amount of tau tangles in the brain has a relationship to cognitive status.

This study involves a PET scans using the radioactive compound, F 18 T807 for measurement of tau deposition. This radioactive compound is not approved by the United States Food and Drug Administration (FDA). An MRI may also be conducted.

Read the detailed description

The investigators hypothesize that in vivo tau imaging will ultimately:

  • Demonstrate the presence of tau fibrils in the brain during the pre-symptomatic stages of cognitive decline, prior to cerebral atrophy, hypometabolism (as measured by 18F-FDG PET imaging), and dementia.
  • Demonstrate that the phenoconversion from cognitively normal (CN) status to early stages of cognitive impairment will be closely correlated with neocortical F 18 T807 uptake and that amyloid positive CN individuals who are positive for F 18 T807 will demonstrate conversion to early dementia.
  • Correlate closely with the appearance of CSF markers of tau, including tau, p-tau, and VILIP-1.
  • Co-localize with specific cognitive deficits (i.e. patients with tau deposition in the left lateral temporal lobe will have primarily language deficits).
  • Predict the onset of dementia more accurately than existing biomarkers.
03

Conditions studied

  • Alzheimer Disease

Keywords

  • Dementia
  • Brain Diseases
  • Central Nervous System Diseases
  • Mild Cognitive Impairment
  • nervous system diseases
  • Neurodegenerative Disease
04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Participants are enrolled in the "Dominantly Inherited Alzheimer's Network (DIAN) Performance Site" (IRB ID: 201109187) or the DIAN Extended Registry (EXR)

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  1. Participants have met all eligibility criteria for enrollment into the "Dominantly Inherited Alzheimer's Network (DIAN) Performance Site" (IRB ID: 201109187) or the DIAN Extended Registry (EXR)
  2. Male or female participants, at least 18 years of age
  3. Cognitively normal, or with mild dementia, as assessed clinically
  4. Participant is able and willing to undergo testing (MRI or CT, PET, radioactive tracer injection; for those unable to undergo an MRI, CT will be used to generate regions-of-interest).
  5. Pre-menopausal women will undergo a urine pregnancy test within 24 hours of drug administration. Only negative pregnancy test result would allow the drug administration to proceed.

Exclusion criteria

Exclusion Criteria:

  1. Has any condition that, in the Investigator's opinion, could increase risk to the participant, limit the participant's ability to tolerate the experimental procedures, or interfere with the collection/analysis of the data (for example, participants with severe chronic back pain might not be able to lie still during the scanning procedures).
  2. Is deemed likely unable to perform the imaging procedures for any reason.
  3. Has a high risk for Torsades de Pointes or is taking medications known to prolong .
  4. Has to F 18 T807 or any of its .
  5. to PET, PET-CT or MR (e.g. electronic medical devices, inability to lie still for long periods) that make it unsafe for the individual to participate.
  6. Severe claustrophobia.
  7. Women who are currently pregnant or breast-feeding, and women who do not agree to use reliable , or to refrain from sexcual activity for 24 hours following administration of the flortaucipir injection will be excluded from the study.
  8. Other than DIAN study, currently participating in any research study and receiving an active study medication for Alzheimer's Disearse, an drug, device, imaging, or placebo within the past 30 days before screening, and throughout this clinical trial up to 2-weeks past any study-related procedures.
  9. Other than DIAN study, current or recent (within 12 months prior to screening) participation in research studies involving radioactive agents such that the total research-related radiation dose to the participant in any given year would exceed the limits set forth in the US Code of Federal Regulations (CFR) Title 21 Section 361.1. http://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/CFRSearch.cfm?FR=361.1. It is the responsibility of each site to confirm the date of the most recent PET scan and to work within the guidelines of the local Radioactive Drug Research Committee (RDRC) regarding the imaging interval.
Terms in these criteria, in plain language(6)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

QT and QTc

On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.

The study may name a correction formula and a limit in milliseconds, often around 450–480.

Hypersensitivity

An allergy, or another reaction of the immune system, to a substance. “Hypersensitivity to the study drug” means a known allergic reaction to it — not every side effect a medicine can have.

Excipients

The other ingredients in a medicine besides the active drug, such as fillers, colours or preservatives.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

05

Study design

Observational model
Other
Time perspective
Prospective
Enrollment
130 participants (estimated)
Patient registry
No

Groups and cohorts

  • Experimental F 18 T807

    Drug: F 18 T807

Interventions

  • Participants will receive a single intravenous bolus injection of approximately 6.5-10mCi (240-370MBq) of F 18 T807. For those who cannot tolerate the full exam, participants will receive single intravenous bolus injection of approximately 6.5-10mCi (240-370MBq) of F 18 T807.

    Also known as: 18F-AV-1451

06

What researchers measure

Primary outcomes

  1. F 18 T807 Standard Uptake Value Ratios (SUVR) will be correlated with other imaging modalities (MRI, PET amyloid imaging) and cognitive performance.

    Time frame: 5 years

07

Study locations

1 site
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jun 9, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT02414178
Responsible party
Tammie L. S. Benzinger, MD, PhD (Professor of Radiology & Neurological Surger, Washington University School of Medicine) — Principal investigator
First posted
Apr 10, 2015
Start date
Mar 1, 2021
Primary completion
Jan 2027 (estimated)
Completion
Jan 2027 (estimated)
Last update
Jun 9, 2026

Study contacts

Tammie Benzinger, MD, PhD
principal investigator · Washington University School of Medicine

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Interested in this study?

Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.

No contact was published for this record. The registry link below has the sponsor’s details.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion