At a glance
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SAABR: Single Arm Phase II Study of AR Targeted Therapy + Atezolizumab + GnRH Analog and Stereotactic Body Radiotherapy (SBRT) to the Prostate in Men With Newly Diagnosed Hormone-sensitive Metastatic Prostate Cancer
In Brief
A Phase 2 clinical trial evaluating Atezolizumab, Abiraterone, and 5 other interventions for Metastatic Prostate Cancer. Active but no longer recruiting, targeting 28 participants across 8 sites.
Detailed Summary
This study is to find out whether adding the study drug atezolizumab and stereotactic body radiotherapy (SBRT) to standard treatment with abiraterone acetate, prednisone, and Lupron® (leuprolide) is a safe and effective way to treat previously untreated metastatic prostate cancer, and to see whether the study treatment works better than the standard treatment.
Study Details
Timeline
Interventions
Atezolizumab 1200 mg IV over 60 minutes every 3 weeks
Abiraterone 1000 mg daily
Prednisone 5 mg daily
Any GnRH analog that is commercially available, injectable, and long acting analog of the native LHRH peptide and is administered to subjects via intramuscular injection. For this study, any GnRH analog can be used and thee manufacturer's instructions for dose and frequency should be followed.
Intensity-modulated, image-guided, ultra-hypofractionated external beam radiotherapy (7.25-7.5 Gy x 5 to prostate and seminal vesicles QOD) will begin around 12 weeks (at Cycle 5 Day 1 (+/-5 days)
160 mg once daily
Subjects who discontinue study treatment for reasons other than progression will be followed every 6 months (+/- 4 weeks) until a documented progression event (i.e., PSA, radiographic, or clinical progression). After a documented progressionevent (whether on treatment or during follow up), subjects will continue to be followed every 6 months (+/- 4 weeks) for overall survival via chart review and/or telephone call.