PSMA Response in Metastasized Hormone Sensitive Prostate Cancer - Enzalutamide

NCT ID: NCT05539300

Last Updated: 2024-01-09

Basic Information

• Recruitment Status: RECRUITING
• Clinical Phase: NA
• Total Enrollment: 150 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2023-03-01
• Study Completion Date: 2026-01-01

Brief Summary

PSMA-PET/CT response measurements after LHRH agonist and upfront enzalutamide therapy in men diagnosed with de novo metastasized hormonal sensitive prostate cancer.

Detailed Description

Rationale: Men, newly diagnosed with metastasized prostate cancer on PSMA PET/CT, who start on standard hormonal therapy, are additionally treated with either upfront chemotherapy or upfront extra androgen-receptor targeted agents ('ARTA'), as per guidelines' recommendations. The benefit in overall survival of these two options is similar, but important differences exist in patient-specific efficacy, costs, side-effects, and impact on quality of life. No predictive factors are available to individualize treatment choice. Currently, a one-size-fits-all strategy with hormonal therapy plus chemotherapy is usually followed.

Objective: To assess the predictive value of early response measurements on PSMA-PET/CT for therapy success, defined as time to development of castration-resistant prostate cancer (CRPC), in order to personalize treatment choice.

Study design: Prospective, single arm, open label, non-interventional, non-therapeutic observational cohort study.

Study population: Patients >18 years with newly diagnosed, histologically proven prostate cancer with >3 skeletal or visceral metastatic lesions on the PSMA-PET/CT, who are considered eligible for upfront therapy (enzalutamide) in addition to standard hormonal therapy.

Main study parameters/endpoints:

Primary parameter: Predictive value of early response on PSMA-PET/CT to upfront therapy, according to PERCIST criteria. Primary endpoint: Time to development of CRPC. Secondary parameters: Predictive value of early response on PSMA-PET/CT to hormonal therapy; predictive value of baseline PSMA-PET/CT, analysis of response in different subgroups of patients: e.g. high versus low tumour load, high versus low PSA, high versus low Gleason score. Secondary endpoint: Time to initiation of second line therapy after castration-resistant disease has been found.

Nature and extent of the burden and risks associated with participation, benefit, and group relatedness:

Patients will be treated according to standard of care, including baseline PSMA-PET/CT. The timing of follow-up PSMA-PET/CT imaging will be standardized. Instead of imaging at biochemical or clinical signs of disease progression, one PSMA-PET/CT will be performed after two months of hormonal therapy, one PSMA-PET/CT will be performed after two months of upfront therapy. Each PSMA-PET/CT scan will require an extra visit (2-3 hours) and a limited radiation burden after intravenous injection of PSMA. The additional information from the standardized follow-up PSMA-PET/CT scans will not be used for clinical decision-making.

Conditions

Prostate Cancer

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: DIAGNOSTIC
• Blinding Strategy: NONE

Study Groups

PSMA response evaluation arm

PSMA-PET/CT response evaluation, 2 months after starting hormonal therapy, 2 months after starting upfront enzalutamide therapy

Group Type: EXPERIMENTAL

PSMA-PET/CT response evaluation

Intervention Type: DIAGNOSTIC_TEST

PSMA-PET/CT response evaluation, 2 months after starting hormonal therapy, 2 months after starting upfront enzalutamide therapy

Interventions

PSMA-PET/CT response evaluation

PSMA-PET/CT response evaluation, 2 months after starting hormonal therapy, 2 months after starting upfront enzalutamide therapy

Intervention Type: DIAGNOSTIC_TEST

Eligibility Criteria

Inclusion Criteria

• Men >18 years of age.
• Mentally competent and understanding of benefits and potential burden of the study.
• Written and signed informed consent.
• Histological confirmed diagnosis of adenocarcinoma of the prostate.
• Indicated to start on hormonal therapy (any LHRH agonist or antagonist).
• Indicated to start on upfront therapy (enzalutamide).
• Any initial PSA.
• Any Gleason score.
• Any T-stage.
• Any N-stage.
• Stage M1, with multiple / high volume metastasis: More than three (>3) metastatic lesions (any combination of either lymph node metastasis outside of pelvis, bone metastasis, or visceral metastasis), as seen on PSMA-PET/CT-imaging. As these patients are treated with palliative intent.

Exclusion Criteria

• Concomitant malignancy (except from BCC of the skin).
• History of prior diagnosed or treated PCa.
• Any unrelated illness (e.g. active infection, inflammation or laboratory abnormalities) that in the judgment of the investigator will significantly affect patient's clinical status and/or outcome of the study.
• Any known allergy for the upfront therapy.
• Any known allergy for LHRH agonist or antagonist.

• Minimum Eligible Age: 18 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: No

Sponsors

UMC Utrecht

OTHER

Sponsor Role: lead

Responsible Party

Roderick van den Bergh

Dr. Roderick CN van den Bergh

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Roderick van den Bergh

Utrecht, , Netherlands

Site Status: RECRUITING

Countries

Netherlands

Facility Contacts

Roderick VD Bergh

Role: primary

roodvdb@hotmail.com

0623456800

Other Identifiers

NL81959.041.22

Identifier Type: -

Identifier Source: org_study_id