Dynamic 68Ga-PSMA and 18F-FDG PET/CT Analysis Prior to 177Lu-PSMA

Prostate Cancer Metastatic Clinical Trial

— PYPET  

Official title:

Dynamic 68Ga-PSMA and 18F-FDG PET/CT Analysis of Metastatic Prostatic Adenocarcinomas Prior to 177Lu-PSMA Treatment

Clinical Trial Details — Status: Not yet recruiting

Administrative data

• NCT number: NCT06450548
• Other study ID #: CHB23.04
• Status: Not yet recruiting
• Phase: N/A
• Start date: June 15, 2024
• Est. completion date: June 30, 2027

Study information

• Verified date: May 2024
• Source: Centre Henri Becquerel
• Contact: Pierre Decazes, MD,PhD
• Phone: +3276673059
• Email: pierre.decazes[@]chb.unicancer.fr
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

Prostate cancer is a significant health issue, representing 21.8% of male cancer cases in France with over 449,000 new cases in 2018. It's the cause of 10% of cancer deaths in Europe.

The PSMA is a target for mCRPC treatment, with therapies like 177Lu-PSMA-617 delivering radiation to cancer cells. The Vision study showed that 177Lu-PSMA-617, combined with standard care, improved survival rates significantly compared to standard care alone.The French ANSM authorized 177Lu-PSMA-617 for mCRPC under certain conditions. Patients must have histologically confirmed mCRPC, be progressive despite treatment, and have PSMA-positive imaging.

Imaging assessments include PSMA PET/CT and 18F-FDG PET/CT to identify FDG-positive and PSMA-negative sites, which are associated with a poorer prognosis.

Parametric analysis using dynamic PET could improve lesion characterization, aiding in treatment decisions. This is the focus of the PyPET study.

The main objective focuses on a comparative analysis of data from dynamic parametric analysis (metabolic influx rate Ki, volume of distribution Vd) and static analysis (standard at 1 hour) using 18F-FDG and 68Ga-PSMA PET/CT for diagnosing metastases, especially in the liver, lymph nodes, and bones. It aims to assess the effectiveness of these imaging techniques in accurately identifying metastatic sites.

Recruitment information / eligibility

• Status: Not yet recruiting
• Enrollment: 60
• Est. completion date: June 30, 2027
• Est. primary completion date: June 15, 2027
• Accepts healthy volunteers: No
• Gender: Male
• Age group: 18 Years and older

Eligibility

Inclusion Criteria:

• Signed informed consent.

• Progressive metastatic castration-resistant prostate adenocarcinoma, which has been treated with taxane chemotherapy and at least one anti-androgen hormone therapy.

• Evaluated by 18F-FDG and 68Ga-PSMA PET/CT prior to potential treatment with 177Lu-PSMA.

• Affiliated with or beneficiary of a social protection scheme.

• WHO stage 0 or 1.

Exclusion Criteria:

• Patients unable to understand the study for any reason or comply with the trial requirements (due to language barriers, psychological issues, geographical constraints, etc.).

• Patients unable to undergo the examinations and/or maintain a prolonged lying position (due to back pain, etc.).

Related Conditions & MeSH terms

• Prostate Cancer Metastatic
• Prostatic Neoplasms

Intervention

Other:
• Parametric acquisition
Parametric acquisition for 18F-FDG PET/CT and 68GA-PSMA PET/CT with 24 h at 15 days of interval

Locations

Country	Name	City	State
France	Centre Henri Becquerel	Rouen

Sponsors (1)

Lead Sponsor	Collaborator
Centre Henri Becquerel

Country where clinical trial is conducted

France, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Comparative analysis of data from dynamic parametric analysis (volume of distribution Vd) and static analysis		15 days
Primary	Comparative analysis of data from dynamic parametric analysis (metabolic influx rate Ki) and static analysis		15 days
Secondary	compare the number of lesions detected as PSMA positive/negative and FDG positive/negative	Comparison of the number of lesions detected as PSMA positive/negative and FDG positive/negative through factorial analysis versus the visual analysis obtained from dynamic and static images (results from the main objective analysis).	15 days