68Ga-PSMA-11 PET/CT Screening Prior to 177Lu-PSMA-617 Therapy for Patients With Metastatic Castrate Resistant Prostate Cancer

July 8, 2025 updated by: Geoffrey Johnson, Mayo Clinic

68Ga-PSMA-11 PET/CT for Screening Prior to 177Lu-PSMA-617 Therapy

This phase III study provides access to 68Ga-PSMA-11 positron emission tomography (PET)/computed tomography (CT) imaging for patients with castrate-resistant prostate cancer that has spread to other places in the body (metastatic) being considered for177Lu-PSMA-617 therapy. T PET is an established imaging technique that utilizes small amounts of radioactivity attached to very minimal amounts of this tracer. CT utilizes x-rays that traverse body from the outside. CT images provide an exact outline of organs and potential inflammatory tissue where it occurs in patient's body. Combining a PET scan with a CT scan can help make the images easier to interpret. The 68Ga-PSMA-11 PET/CT scan is done with a very small amount of radioactive tracer call 68- gallium PSMA-11. In patients that have been diagnosed with prostate cancer, a protein called prostate-specific membrane antigen (PSMA) appears in large amounts on the surface of the cancerous cells. The radioactive imaging agent (68Ga-PSMA-11) has been designed to circulate through the body and attach itself to the PSMA protein on prostate cancer cells. A PET/CT scan is then used to detect the location of prostate cancer lesions. By gaining access to 68Ga-PSMA-11 PET/CT scans, patients may be safely screened for 177Lu-PSMA-617 therapy in the treatment of metastatic castrate resistant prostate cancer.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

PRIMARY OBJECTIVE:

I. To overcome a clinical access issue that would otherwise block patients from reimbursement of a new cancer therapy, and therefore block or significantly delay their care.

OUTLINE:

Patients receive gallium Ga 68 gozetotide intravenously (IV) and then undergo a positron emission tomography (PET)/computed tomography (CT) scan throughout the trial.

Study Type

Interventional

Enrollment (Actual)

163

Phase

  • Phase 3

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
    • Minnesota
      • Rochester, Minnesota, United States, 55905
        • Mayo Clinic in Rochester

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

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Study Population

Adult male patients actively under the care of a medical oncology, radiation oncology, or urology physician at Mayo Clinic and deemed eligible for PSMA-targeted radionuclide therapy.

Description

Inclusion Criteria:

  • An adult male patient who is actively under the care of a medical oncology, radiation oncology or urology physician at Mayo Clinic

  • An adult male patient who is deemed eligible (or potentially/likely eligible) for PSMA-targeted radionuclide therapy by a nuclear medicine physician or Radiologist in the nuclear medicine therapy practice, or by the Prostate Theranostic Tumor Board (PTuB)

    • Eligibility will be documented in the medical record by the clinical practice
    • It is acceptable for the patient to be eligible for PSMA-targeted radionuclide therapy in all regards except for having completed a PSMA-targeted PET scan showing PSMA-positive prostate cancer
    • It is acceptable for a patient to be potentially eligible for therapy, but have a relative contraindication, such as a minor laboratory abnormality, and be on the list for discussion at the PTuB in the future
  • An adult male patient who has not received a 68Ga-PSMA-11 PET/CT or PET/magnetic resonance (MR), or for whom a repeat 68Ga-PSMA-11 PET/CT exam is needed per the clinical practice to ensure eligibility
  • An adult male patient who does not otherwise have access to a reimbursable clinical 68Ga-PSMA-11 PET scan
  • An adult above the ages of 18

Exclusion Criteria:

  • A patient who is unable to consent per Mayo guidelines
  • A patient who is unable to lay still, or otherwise successfully complete the imaging exam

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: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Observational (68Ga-PSMA-11 PET/CT)
Patients receive 68Ga-PSMA-11 IV and then undergo a PSMA PET/CT scan throughout the trial.
Procedure: Computed Tomography
Undergo PET/CT scan
Other Names:
  • CT
  • CAT
  • CAT Scan
  • Computed Axial Tomography
  • Computerized Axial Tomography
  • Computerized Tomography
  • CT Scan
  • tomography
Drug: Gallium Ga 68 Gozetotide
Given IV
Other Names:
  • (68)Ga labeled Glu-NH-CO-NH-Lys(Ahx)-HBED-CC
  • (68)Ga-labeled Glu-urea-Lys(Ahx)-HBED-CC
  • (68)Ga-PSMA Ligand Glu-urea-Lys(Ahx)-HBED-CC
  • (68)Gallium-PSMA Ligand Glu-urea-Lys(Ahx)-HBED-CC
  • (68Ga)Glu-urea-Lys(Ahx)-HBED-CC
  • 68Ga-DKFZ-PSMA-11
  • 68Ga-HBED-CC-PSMA
  • 68Ga-labeled Glu-NH-CO-NH-Lys(Ahx)-HBED-CC
  • 68Ga-PSMA
  • 68Ga-PSMA-11
  • 68Ga-PSMA-HBED-CC
  • [68Ga] Prostate-specific Membrane Antigen 11
  • [68Ga]GaPSMA-11
  • Ga PSMA
  • Ga-68 labeled DKFZ-PSMA-11
  • Ga-68 labeled PSMA-11
  • GA-68 PSMA-11
  • Gallium Ga 68 PSMA-11
  • Gallium Ga 68-labeled PSMA-11
  • GALLIUM GA-68 GOZETOTIDE
  • Gallium-68 PSMA
  • Gallium-68 PSMA Ligand Glu-urea-Lys(Ahx)-HBED-CC
  • GaPSMA
  • PSMA-HBED-CC GA-68
Procedure: Positron Emission Tomography
Undergo PET/CT scan
Other Names:
  • Medical Imaging, Positron Emission Tomography
  • PET
  • PET Scan
  • Positron Emission Tomography Scan
  • Positron-Emission Tomography
  • proton magnetic resonance spectroscopic imaging

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Patients Reporting Adverse Reactions
Time Frame: From the time of injection until the time after imaging scan is complete, up to 1 day
Safety of gallium Ga 68 gozetotide [68Ga-prostate-specific membrane antigen (PSMA)-11] assessed by the number of patients reporting unexpected adverse reactions from the time of injection until the time they leave the care of the division of nuclear medicine. If any adverse reactions are reported, the patient will be evaluated by a nurse and/or physician and will receive appropriate care. The principal investigator (PI) or those designated by the PI will ascertain the severity of the adverse event and how likely the adverse reaction was associated with the injected 68Ga-PSMA-11.
From the time of injection until the time after imaging scan is complete, up to 1 day

Collaborators and Investigators

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

Sponsor

Mayo Clinic

Investigators

  • Principal Investigator: Geoffrey B. Johnson, M.D., Ph.D., Mayo Clinic in Rochester

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)

May 9, 2022

Primary Completion (Actual)

December 31, 2023

Study Completion (Actual)

December 31, 2023

Study Registration Dates

First Submitted

September 14, 2022

First Submitted That Met QC Criteria

September 16, 2022

First Posted (Actual)

September 21, 2022

Study Record Updates

Last Update Posted (Actual)

July 18, 2025

Last Update Submitted That Met QC Criteria

July 8, 2025

Last Verified

July 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 22-003732
  • NCI-2022-04135 (Registry Identifier: CTRP (Clinical Trial Reporting Program))

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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