RECRUITING

Phase 2 Randomized Trial of Flexible Dosing Schedule of 177Lu-PSMA-617 for the Treatment of Metastatic Castration-Resistant Prostate Cancer (FLEX-MRT)

Study Overview

This clinical trial focuses on testing the efficacy of different digital interventions to promote re-engagement in cancer-related long-term follow-up care for adolescent and young adult (AYA) survivors of childhood cancer.

Description

In advanced metastatic castration resistant prostate cancer (mCRPC) progressing after chemotherapy and androgen receptor (AR)-targeted therapy 177Lu-PSMA-617 is an effective treatment. 177Lu-PSMA-617 RLT is administered with a fixed schedule: 6 treatment cycles, administered every 6 weeks. However, the optimum number of cycles of 177Lu-PSMA in patients who show good response remains unknown. Some patients may benefit from more than 6 cycles of therapy. Additionally, some patients experience a complete or almost complete response before the last cycle. It is unclear whether these patients benefit from the subsequent remaining treatment cycle(s). A treatment holiday period would spare these patients some exposure to the therapy agent and avoid potentially unnecessary toxicity when treatment efficacy is already maximal and additional treatment effect cannot be expected. This randomized phase 2 study compares a group of patients treated with LuPSMA on a flexible and extended dosing schedule including "treatment holiday" periods (investigational arm, up to 12 cycles, as described below) to a control group treated with a fixed dosing schedule of 6 treatments cycles maximum administered every 6 weeks. The flexible dosing schedule in the investigational arm will be based on single photon emission computed tomography (SPECT)/computed tomography (CT) response assessments obtained 24h after injection of LuPSMA therapy cycle. The response assessment during treatment holiday period will be based on positron emission tomography/computed tomography (PET/CT) every 12 weeks. Single-time point SPECT/CT dosimetry protocol at every cycle will be performed and will allow to determine the number of cycles that subjects may receive under the study without exceeding the kidney dose threshold.

Official Title

A Phase 2 Randomized Trial in Patients with Metastatic Castration Resistant Prostate Cancer to Determine the Efficacy of a Flexible Dosing Schedule of Lu-PSMA Treatment Up to 12 Cycles Including Potential Treatment Holiday Periods in Comparison to the Standard Fixed Dosing Schedule of Six Cycles Every Six Weeks (FLEX-MRT)

Quick Facts

Study Start:2024-08-01
Study Completion:2028-12-31
Study Type:Not specified
Phase:Not Applicable
Enrollment:Not specified
Status:RECRUITING

Study ID

NCT06216249

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.

Ages Eligible for Study:18 Years
Sexes Eligible for Study:MALE
Accepts Healthy Volunteers:No
Standard Ages:ADULT, OLDER_ADULT
Inclusion CriteriaExclusion Criteria
  1. * Patients must have prostate cancer proven by histopathology
  2. * Patients must have ≥ 1 metastatic lesion by any imaging (CT, magnetic resonance imaging \[MRI\], bone scan, PET)
  3. * Patients must have received at least one regimen of chemotherapy for mCRPC
  4. * Patients must have received at least one androgen-receptor signaling inhibitors (ARSI)
  5. * Patients must be eligible by PSMA PET VISION criteria. PSMA PET/CT must be performed within 8 weeks of planned first cycle of 177Lu-PSMA-617
  6. * White blood cell (WBC) ≥ 2,500/ul
  7. * Platelets (PLT) ≥ 100,000/ul
  8. * Hemoglobin (Hb) ≥ 9.0 g/dl
  9. * Absolute neutrophil count (ANC) ≥ 1,500 mm\^3
  10. * Patients must have an Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2
  11. * Patients must be adults ≥ 18 years of age
  12. * Patients must have the ability to understand and sign an approved informed consent form (ICF)
  13. * Patients must have the ability to understand and comply with all protocol requirements
  1. * Prior cycle of 177Lu-PSMA-617 therapy
  2. * Less than 6 weeks between last myelosuppressive therapy (including docetaxel, cabazitaxel, strontium-89, samarium-153, rhenium-186, rhenium-188, radium-223, hemi-body irradiation) and first cycle of 177Lu-PSMA-617 therapy
  3. * Glomerular filtration rate (GFR) \< 50 ml/min
  4. * Urinary tract obstruction or marked hydronephrosis

Contacts and Locations

Study Contact

Stephanie Lira
CONTACT
310-206-0596
StephanieLira@mednet.ucla.edu

Principal Investigator

Jeremie Calais
PRINCIPAL_INVESTIGATOR
UCLA / Jonsson Comprehensive Cancer Center

Study Locations (Sites)

UCLA / Jonsson Comprehensive Cancer Center
Los Angeles, California, 90095
United States

Collaborators and Investigators

Sponsor: Jonsson Comprehensive Cancer Center

  • Jeremie Calais, PRINCIPAL_INVESTIGATOR, UCLA / Jonsson Comprehensive Cancer Center

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 Registration Dates

Study Start Date2024-08-01
Study Completion Date2028-12-31

Study Record Updates

Study Start Date2024-08-01
Study Completion Date2028-12-31

Terms related to this study

Additional Relevant MeSH Terms

  • Prostate Carcinoma
  • Stage IVB Prostate Cancer American Joint Committee on Cancer (AJCC) V8