Prognostic Value of 177Lutetium-PSMA Single Photon Emission Tomography and Timing of Response (RECIP)

June 10, 2026 updated by: IMBERT Laetitia, Central Hospital, Nancy, France

Prognostic Value of [¹⁷⁷Lu]Lu-PSMA SPECT and Timing of RECIP Assessment in mCRPC

177Lutetium-PSMA-617 is an established treatment for patients with metastatic castration-resistant prostate cancer (mCRPC). Early response assessment is critical for optimizing patient management. Response Evaluation Criteria in Prostate Imaging (RECIP) 1.0, initially developed for Positon Emission Tomography (PET) with 68Ga-PSMA, have demonstrated prognostic value, particularly after two treatment cycles. Recent studies suggest that SPECT at cycle 2 provides prognostic information, although it reflects only the first treatment cycle, whereas PET-based RECIP, assessed after cycle 2, captures the effect of two cycles. This study aims to evaluate the prognostic value of quantitative 177Lu-PSMA-SPECT biomarkers and determine the optimal timing for RECIP-based assessment.

Study Overview

Status

Not yet recruiting

Conditions

Detailed Description

Early response assessment is critical for optimizing patient management. Response Evaluation Criteria in Prostate Imaging (RECIP) 1.0, initially developed for Positon Emission Tomography (PET) with 68Ga-PSMA, have demonstrated prognostic value, particularly after two treatment cycles. Recent studies suggest that SPECT at cycle 2 provides prognostic information, although it reflects only the first treatment cycle, whereas PET-based RECIP, assessed after cycle 2, captures the effect of two cycles. This study aims to evaluate the prognostic value of quantitative 177Lu-PSMA-SPECT biomarkers and determine the optimal timing for RECIP-based assessment.

It would indeed be very interesting to obtain a prognostic value using imaging performed after treatment, which also provides dosimetry information to organs at risk and to the tumor and/or metastases.

Study Type

Observational

Enrollment (Estimated)

280

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

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

N/A

Sampling Method

Probability Sample

Study Population

Patients with metastatic castration-resistant cancer who received at least two cycles of 177Lu-PSMA

Description

Inclusion Criteria:

  • Patients with metastatic castration-resistant cancer who received at least two cycles of 177Lu-PSMA

Exclusion Criteria:

  • Patients who refused to have their data used for research purposes

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

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
To measure the Standardized Uptake Value of activity at the tumor lesion on 177Lu-PSMA-SPECT for the pronostic value of scintigraphy post-treatment
Time Frame: 7 days
Analysis of Standardized Uptake value
7 days
To measure of total tumor activity at the tumor lesion on 177Lu-PSMA-SPECT for the pronostic value of scintigraphy post-treatment
Time Frame: 7 days
Analysis of Total Tumor Activity
7 days
To measure the tumor volume at the tumor lesion on 177Lu-PSMA-SPECT for the pronostic value of scintigraphy post-treatment
Time Frame: 7 days
Analysis of Tumor Volume
7 days

Collaborators and Investigators

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

Sponsor

Central Hospital, Nancy, France

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 (Estimated)

July 1, 2026

Primary Completion (Estimated)

September 1, 2026

Study Completion (Estimated)

December 1, 2026

Study Registration Dates

First Submitted

May 6, 2026

First Submitted That Met QC Criteria

June 10, 2026

First Posted (Actual)

June 12, 2026

Study Record Updates

Last Update Posted (Actual)

June 12, 2026

Last Update Submitted That Met QC Criteria

June 10, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2026PI123

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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