PSMA-PET/CT to Assess the Expression of Specific Membrane Antigen (PSMA) in Patients With Progressive Triple-negative Breast Cancer. (PRISMA)

July 15, 2025 updated by: Jules Bordet Institute

PRISMA: A Single-centre, Prospective Phase II Imaging Study Using PSMA-PET/CT to Assess the Expression of Specific Membrane Antigen (PSMA) in Patients With Progressive Triple-negative Breast Cancer.

This is a descriptive, prospective, single centre study. This study will assess PSMA expression via the uptake of radiolabelled PSMA-ligand using PET/CT imaging in mTNBC lesions pre-identified on 18F-FDG PET/CT in order to evaluate the feasibility of molecular radionuclide therapy in refractory mTNBC using the Lutetium-177 radiolabelled PSMA.

Study Overview

Status

Recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

20

Phase

  • Phase 2

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 Backup

Study Locations

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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Written informed consent in accordance with institutional guidelines and obtained prior to any study procedure
  • Women with ≥ 18 years-old
  • Eastern Cooperative Oncology Group Performance Status of 0 to 2
  • Confirmed diagnosis of progressive metastatic TNBC and presenting measurable disease on 18F-FDG PET/CT (performed within 2 weeks) or Brain MRI in case of progressive brain metastases (performed within 4 weeks) prior to PSMA PET/CT.
  • Radiolabelled PSMA PET/CT has to be performed before the next treatment line initiation

Exclusion Criteria:

  • Pregnant or lactating patients
  • Other active neoplastic disease
  • Treatment by another molecule that is the object of investigation within 30 days
  • Skin only metastatic disease
  • Patients with a significant medical, neuro-psychiatric, or surgical condition, which, in the investigator's opinion, may interfere with completion of the study

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
Intervention / Treatment
Experimental: Patients with progressive metastatic TNBC and presenting measurable disease on 18F-FDG PET/CT
Diagnostic test: Ga-PSMA PET/CT
Patient undergo Ga-PSMA PET/CT prior to the start of the new drug treatment

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Assess PSMA expression in progressive metastatic TNBC patients
Time Frame: once at baseline prior to the start of the new anti cancer treatment
uptake of radiolabelled PSMA-ligand in patients with mTNBC on PET/CT images.
once at baseline prior to the start of the new anti cancer treatment

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Assess the concordance between lesions visualized on PSMA PET/CT and 18F-FDG PET/CT images (or brain MRI in case of brain metastases).
Time Frame: once at baseline prior to the start of the new anti cancer treatment
Matching between FDG and PSMA-labelled radiotracers uptake: on PSMA PET/CT and 18F-FDG PET/CT images, each lesion will be identified and faced with the other images. Each imaging pair will be classified as complete match, partial match or no match between the different types of imaging
once at baseline prior to the start of the new anti cancer treatment

Collaborators and Investigators

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

Sponsor

Jules Bordet Institute

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 30, 2022

Primary Completion (Actual)

June 2, 2025

Study Completion (Estimated)

December 1, 2025

Study Registration Dates

First Submitted

September 6, 2023

First Submitted That Met QC Criteria

September 26, 2023

First Posted (Actual)

September 28, 2023

Study Record Updates

Last Update Posted (Actual)

July 18, 2025

Last Update Submitted That Met QC Criteria

July 15, 2025

Last Verified

March 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • IJBMNdTNBC

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

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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