NCT03678025

Standard Systemic Therapy With or Without Definitive Treatment in Treating Participants With Metastatic Prostate Cancer

Phase III Randomized Trial of Standard Systemic Therapy (SST) Versus Standard Systemic Therapy Plus Definitive Treatment (Surgery or Radiation) of the Primary Tumor in Metastatic Prostate Cancer

• Status: Recruiting
• Phase: Phase 3
• Study type: Interventional
• Enrollment: 1,273 (estimated)
• Sponsor: SWOG Cancer Research Network · Network
• Sex: Male
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This phase III trial studies how well standard systemic therapy with or without definitive treatment (prostate removal surgery or radiation therapy) works in treating participants with prostate cancer that has spread to other places in the body. Addition of prostate removal surgery or radiation therapy to standard systemic therapy for prostate cancer may lower the chance of the cancer growing or spreading.

Detailed description

PRIMARY OBJECTIVES: I. To compare overall survival in metastatic prostate cancer patients who are randomized to standard systemic therapy (SST) plus definitive treatment of the primary tumor versus standard systemic therapy alone. SECONDARY OBJECTIVES: I. To compare overall survival in metastatic prostate cancer patients who received SST plus surgical excision of the primary tumor versus SST alone in the subset who specify the surgical intent stratification factor. II. To compare the rate of symptomatic local progression between the treatment arms. III. To compare progression-free survival (PFS) between the two treatment arms. IV. To compare rates of progression-free survival between arms for the subsets of patients with and without metastasis directed therapy (MDT) to oligometastatic sites. QUALITY OF LIFE OBJECTIVES: I. To compare between arms patient-reported urinary function and urinary bother over time (after initiation of SST at 6 months, 1, 2, and 3 years) using the Expanded Prostate Cancer Index Composite (EPIC) and patient-reported pain and physical functioning using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire (EORTC QLQ-C30) between patients receiving standard systemic therapy and those receiving systemic therapy and definitive management of the primary prostate cancer. OTHER OBJECTIVES: I. To bank tissue and whole blood specimens for future use. OUTLINE: INDUCTION: Participants receive 1 of 6 acceptable forms of SST for 22-28 weeks. I. Participants undergo a bilateral orchiectomy. II. Participants receive goserelin acetate subcutaneously (SC) every 28 days or 12 weeks, histrelin acetate SC every 12 months, leuprolide acetate SC or intramuscularly (IM) every 1, 3, 4, or 6 months, and triptorelin every 1, 3, or 6 months. III. Participants receive goserelin acetate SC every 28 days or 12 weeks, histrelin acetate SC every 12 months, leuprolide acetate SC or IM every 1, 3, 4, or 6 months, and triptorelin every 1, 3, or 6 months. Participants also receive nilutamide orally (PO) daily, flutamide PO every 8 hours, and bicalutamide PO daily. IV. Participants receive degarelix via injection for 2 doses and then every 28 days. V. Participants receive nilutamide PO daily, flutamide PO every 8 hours, and bicalutamide PO daily. Participants also receive docetaxel over 1 hour every 3 weeks with or without prednisone PO every 12 hours. VI. Participants receive nilutamide PO daily, flutamide PO every 8 hours, and bicalutamide PO daily. Participants also receive abiraterone PO daily or prednisone PO every 12 hours. After completion of 22-28 weeks of SST, participants are then randomized to 1 of 2 arms. ARM I: Participants receive 1 acceptable form of SST as in Induction except for treatment with docetaxel and prednisone. ARM II: Participants receive 1 acceptable form of SST as in Induction except for treatment with docetaxel and prednisone. Participants undergo prostatectomy within 8 weeks after randomization or radiation therapy within 4 weeks of randomization. After completion of study treatment, participants are followed up for 8 years.

Conditions

• Castration Levels of Testosterone
• Metastatic Prostatic Adenocarcinoma
• Stage IV Prostate Cancer AJCC v8
• Stage IVA Prostate Cancer AJCC v8
• Stage IVB Prostate Cancer AJCC v8

Interventions

Type	Name	Description
DRUG	Abiraterone	Given PO
DRUG	Bicalutamide	Given PO
DRUG	Degarelix	Given via injection
DRUG	Docetaxel	intravenous
DRUG	Flutamide	Given PO
DRUG	Goserelin Acetate	Given SC
DRUG	Histrelin Acetate	Receive SC
DRUG	Leuprolide Acetate	Receive SC or IM
DRUG	Nilutamide	Given PO
PROCEDURE	Orchiectomy	Undergo bilateral orchiectomy
DRUG	Prednisone	Given PO
OTHER	Quality-of-Life Assessment	Ancillary studies
RADIATION	Radiation Therapy	Standard radiation
PROCEDURE	Radical Prostatectomy	Standard surgery
DRUG	Triptorelin	injection

Timeline

• Start date: 2018-09-24
• Primary completion: 2028-04-01
• Completion: 2031-10-01
• First posted: 2018-09-19
• Last updated: 2025-09-11

Locations

338 sites across 5 countries: United States, Chile, Colombia, Mexico, Switzerland

Regulatory

• FDA-regulated device study