Detection of Graft Versus Host Disease With [18F]F-AraG

November 21, 2025 updated by: CellSight Technologies, Inc.

Detection of Graft Versus Host Disease With [18F]F-AraG, a Positron Emission Tomography Tracer for Activated T Cells

This is a single-center imaging study to determine utility of in vivo imaging with [18F]F-AraG to identify sites of Graft Versus Host Disease (GVHD) in patients highly suspected of having acute GVHD who require systemic therapy, and patients at high risk for developing acute GVHD. [18F]F-AraG PET scans will be compared to biopsy results to correlate T cell accumulation which is implicated in the disease. High risk patients will be followed to verify predictive potential of [18F]F-AraG.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

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 single-center imaging study will enroll three cohorts of participants: healthy volunteers, patients highly suspected to have acute GVHD (aGVHD) and requiring systemic therapy, and patients at high risk for developing GVHD.

A total of 5 healthy volunteers will undergo [18F]F-AraG PET scans and blood sampling to better understand [18F]F-AraG biodistribution and stability in the body.

A total of 10 highly suspected acute GVHD patients will be scanned following biopsy taken to confirm aGVHD. The staging and grading of the disease using the Glucksberg grade and International Bone Marrow Transplant Registry Severity Index (IBMTR) at time of enrollment will be noted. Biopsy tissues of consented patients will be analyzed further for T cell involvement.

A total of 15 high-risk patients (recipients of myeloablative or reduced intensity allogeneic transplants using either bone marrow or peripheral blood stem cells from HLA-matched or HLA-mismatched related or unrelated donors-protocols 9142, 9022, 9924) will be recruited. All those that consent will undergo a PET-CT scan with [18F]FAraG on day 4 +/- 2 days post transplant. Additionally, these patients will be scanned again between day 14-21 post transplant. Follow up on these patients will note those that go on to develop aGVHD and the clinical end point will be correlated to the scans to verify the predictive potential of the radiotracer.

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.
Interventional

Enrollment (Actual)

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.
9

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 1

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
    • California
      • Stanford, California, United States, 94305
        • Stanford Hospital

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

21 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  1. Must be 21 years of age or older.

  2. Must understand and voluntarily have signed an Informed Consent after its contents have been fully explained.

    1. For patients highly suspected to have aGVHD and requiring systemic therapy, informed consent should be signed after biopsy taken to support clinical diagnosis.
    2. For patients at high risk for developing aGVHD, informed consent should be signed prior to transplant.
  3. For healthy volunteers only: Must have no known medical problems that would make undergoing the scan hazardous to the health of the patient or interfere with the results. In particular subjects should not have any cardiac or immunological disorders as these would likely affect the scan results. Subjects should have had a full physical exam within 6 months of the study. If healthy volunteers have not had a full medical exam within 6 months of the study, one of the nuclear medicine physicians will conduct the medical exam prior to any study procedures.
  4. For patients highly suspected to have aGVHD and requiring systemic therapy only: Taking steroid treatment for suspected aGVHD for 3 days or less.
  5. For patients at high risk for developing aGVHD only: Recipients of myeloablative or reduced intensity allogeneic transplants using either bone marrow or peripheral blood stem cells from HLA-matched or HLA-mismatched related or unrelated donors (protocols 9142, 9022, 9924) who have not yet been placed on any therapy for acute GVHD.

Exclusion Criteria:

  1. Pregnant or nursing
  2. Individuals with known or suspected substance abuse, obtained by self-reporting.
  3. Uncontrolled infection
  4. Relapsed/persistent malignancy
  5. Currently receiving immunotherapy

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

  • Primary Purpose: Diagnostic
  • Allocation: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
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.
Experimental: Highly suspected to already have aGVHD
Patients highly suspected to have aGVHD. These patients will undergo a [18F]F-AraG PET-CT scan following a biopsy taken to confirm aGVHD.
Drug: [18F]F-Ara-G
the [18F]F-AraG tracer will be administered as a single bolus injection of approximately 5 mCi into a hand or arm vein.
Experimental: High risk of developing aGVHD
Patients at high risk of developing aGVHD will undergo a [18F]F-AraG PET-CT scan on day 4 +/- 2 days post transplant. Additionally these patients will be scanned again between day 14-21 post transplant.
Drug: [18F]F-Ara-G
the [18F]F-AraG tracer will be administered as a single bolus injection of approximately 5 mCi into a hand or arm vein.
Experimental: Healthy Subjects
Healthy subject volunteers will undergo preliminary evaluation to ensure eligibility, receive and sign an informed consent, be enrolled in the trial, and then have a [18F]F-AraG PET-CT scan.
Drug: [18F]F-Ara-G
the [18F]F-AraG tracer will be administered as a single bolus injection of approximately 5 mCi into a hand or arm vein.

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
Distribution of Acute GVHD Grades (MAGIC Criteria) at Time of PET/CT Scan
Time Frame: At the time of the PET/CT scan: within 7 days of GVHD suspicion for the Highly Suspected arm, and at the Day 4 ± 2 post-transplant scan for the High-Risk arm
Acute GVHD severity was graded using the Mount Sinai Acute GVHD International Consortium (MAGIC) criteria (Grades I-IV). Grades were assigned based on organ involvement documented in the clinical chart and biopsy review at the time of the PET/CT scan. We reported the number of participants within each grade.
At the time of the PET/CT scan: within 7 days of GVHD suspicion for the Highly Suspected arm, and at the Day 4 ± 2 post-transplant scan for the High-Risk arm
Number of Participants Who Developed aGVHD Within 6 Months Post-Scan.
Time Frame: From PET/CT scan to 6 months post-scan.
All participants were followed for 6 months post-imaging. Development of GVHD was defined by clinical diagnosis documented in the medical record..
From PET/CT scan to 6 months post-scan.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Biodistribution and Kinetic Behavior of [18F]F-AraG in Healthy Volunteers
Time Frame: Follow up will occur 2 to 7 days post scan.
This outcome was intended to assess biodistribution and kinetic behavior of [18F]F-AraG in healthy adult volunteers. However, no healthy volunteers were imaged due to funding limitations.
Follow up will occur 2 to 7 days post scan.

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.
CellSight Technologies, Inc.

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 Cancer Institute (NCI)
Stanford University

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: Robert Negrin, M.D.., Stanford University

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.
May 15, 2018

Primary Completion (Actual)

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.
June 21, 2023

Study Completion (Actual)

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.
October 21, 2023

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).
December 5, 2017

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.
December 5, 2017

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.
December 11, 2017

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.
December 8, 2025

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.
November 21, 2025

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.
November 1, 2025

More Information

Terms related to this study

Keywords

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.
  • IRB_38850
  • 5P01CA049605 (U.S. NIH Grant/Contract)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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