PET Imaging of Solid Tumors Using 124I-Humanized 3F8: A Pilot Study

December 2, 2025 updated by: Memorial Sloan Kettering Cancer Center
The purpose of this study is to find out how an antibody called Hu3F8 travels through the body and to tumors. Antibodies, like Hu3F8, are proteins that help attack tumors or fight infections. Antibodies can be made by your own body or in a laboratory. The target of an antibody is called an antigen; antibodies fit their antigen like a lock fits a key.

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.

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.
7

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.
  • Not Applicable

Contacts and Locations

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

Study Locations

  • United States
    • New York
      • New York, New York, United States, 10065
        • Memorial Sloan Kettering Cancer Center

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

3 years to 90 years (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients with the diagnosis of neuroblastoma must meet both of the following criteria:

    • Diagnosis confirmed by histological assessment by MSKCC Department of pathology or by the presence of BM metastases PLUS elevated urinary catecholamines
    • Relapsed or refractory stage 4 disease or relapsed or refractory stage MYCN-amplified 2B or 3 disease.
    • Patients with tumors other than neuroblastoma must meet both the following criteria:
    • Have one of the following diagnoses (these tumors are known to express GD2 on cell surface):
    • Melanoma
    • Osteogenic sarcoma
    • Leiomyosarcoma
    • Ewing sarcoma
    • Liposarcoma
    • Fibrosarcoma
    • Malignant fibrous histiocytoma
    • Spindle cell sarcoma
    • Small cell lung cancer
    • Medulloblastoma metastatic to extracranial sites
    • Paraganglioma
    • Have refractory or relapsed or metastatic disease
    • Patients with solid tumors with diagnoses OTHER than neuroblastoma or those listed above will be eligible if they meet both of the following criteria:
    • Immunohistochemical demonstration of GD2 expression on cell surface (Tumor assessment by immunohistochemistry is required for this group of patients)
    • Have refractory or relapsed disease or metastatic disease. All patients must have measurable or evaluable disease
    • Age 3-90 years
    • Prior treatment with anti-GD2 monoclonal antibody is permitted only if human anti-human antibody titer is ≤1300 assay developed by Dr. Nai-Kong Cheung.
    • Negative serum pregnancy test in women of childbearing potential
    • Women of child-bearing potential must be willing to practice an effective method of birth control while on study
    • Signed informed consent indicating awareness of the investigational nature of this study.

Exclusion Criteria:

  • Existing major organ dysfunction > grade 2, with the exception of myelosuppression (neutrophil count > or = 500/μl and platelet count > or = 25,000/μl are acceptable) and hearing loss.

    • Acute life threatening infection
    • Requirement for sedation for PET/CT scans
    • Pregnant women or women who are breast-feeding.
    • Inability to comply with protocol requirements.
    • Hypersensitivity to potassium iodide or Lugols products
    • Prior development of positive human antimouse antibody response (HAMA) or human antihuman antibody response (HAHA)
    • Positive human anti-hu3F8 antibody titer.

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: N/A
  • Interventional Model: Single Group 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: PET Imaging using 124I-Humanized 3F8
124I-hu3F8 at a dose of 3mCi/m2 (with a maximum dose of 5mCi) will be injected IV. 124I-hu3F8 PET/CT scans will be performed at approximately 2-4 hours, 18-26hours, 48-72 hours and 96-144 hours after injection of 124I-hu3F8. A low dose CT scan will be obtained with each PET scans. PET/CT scan images will be analyzed to determine biodistribution of 124I-hu3F8 and to determine dosimetry to organs and sites of disease. Comparison of tumor targeting and tumor dosimetry will be made between the two cohorts of patients: (a) NB and (b) other solid tumors. Blood will be drawn where feasible at multiple time points: approximately 0h, 0.5h, 1h, 2h, 4-8h, 24h, 48h, 96h and 120h-144h after injection of 124I-hu3F8 and radioactivity measured to determine pharmacokinetics of 124I-hu3F8.
Biological: 124I-Humanized 3F8

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
radioactivity measured to determine pharmacokinetics of 124I-hu3F8
Time Frame: 2 years
Following 124I-hu3F8 administration, upon completion of normal saline flush, blood will be drawn for pharmacokinetic studies at the following time points: 0h, 0.5h, 1h, 2h, 4-8h, 24h, 48h, 96h and 120-144 h.after injection of 124I-hu3F8 and radioactivity measured to determine pharmacokinetics of 124I-hu3F8.
2 years

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
PET/CT scan images will be analyzed to determine bio distribution of 124I-hu3F8
Time Frame: 2 years
124I-hu3F8 will be injected IV followed by PET/CT scans at serial timepoints PET/CT scan images will be analyzed to determine biodistribution of 124I-hu3F8
2 years

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.
Memorial Sloan Kettering Cancer Center

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.
Y-mAbs Therapeutics

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: Shakeel Modak, MD, Memorial Sloan Kettering Cancer Center

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

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.
November 1, 2014

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.
November 1, 2026

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.
November 1, 2026

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).
November 20, 2014

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 1, 2014

First Posted (Estimated)

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 4, 2014

Study Record Updates

Last Update Posted (Estimated)

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 4, 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.
December 2, 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.
December 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.
  • 13-147

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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