NCT03821246 · David Oh
Neoadjuvant Atezolizumab-Based Combination Therapy in Men With Localized Prostate Cancer Prior to Radical Prostatectomy
What this study is about
This phase II trial studies how well atezolizumab works alone or in combination with etrumadenant or tocilizumab in treating men with localized prostate cancer before radical prostatectomy. Immunotherapy with monoclonal antibodies, such as atezolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread.
View original scientific description
This phase II trial studies how well atezolizumab works alone or in combination with etrumadenant or tocilizumab in treating men with localized prostate cancer before radical prostatectomy. Immunotherapy with monoclonal antibodies, such as atezolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Androgens can cause the growth of prostate cancer cells.
Interventions
DRUG
Atezolizumab
Given IV
DRUG
Tocilizumab
Given IV
DRUG
Etrumadenant
Given Orally
Primary outcome measures
Proportion of subjects who demonstrate a positive response to neoadjuvant atezolizumab and atezolizumab-based combination therapy for each Cohort of the study
Time frame: Up to 12 months
A positive response is defined as a ≥40% increase in the number of infiltrating cluster of differentiation 3 (CD3) + T cells between the pre-treatment biopsy at baseline and the post-treatment RP specimen. Thus, a negative response is a \<40% increase. The primary endpoint will include all enrolled subjects who receive at least 1 dose of study treatment and undergo RP. Analysis of the primary endpoint will be performed for each cohort independently
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Histologically confirmed adenocarcinoma of the prostate. a. Subjects with small cell or neuroendocrine PC are not eligible. 2. Eligible for radical prostatectomy as determined by urologic oncology surgeon, and subject consents to proceeding with radical prostatectomy. a. Deemed by urologic oncology surgeon to be appropriate for a "window-of-opportunity"study. 3. Only patients with high-risk disease are eligible for the safety lead-in for each cohort. Patients with intermediate-risk disease will be included after interim analyses is complete for the corresponding cohort and the PI has determined that it is safe to do so. 4. Availability of a representative tumor specimen that is suitable for the planned study analyses, as determined by the Principal Investigator. 1. A formalin-fixed paraffin-embedded (FFPE) tumor specimen in a paraffin block (preferred) or at least 15 slides containing unstained, freshly cut, serial sections should be submitted along
Where
- San Francisco, California
- St Louis, Missouri
Collaborators
Genentech, Inc., Arcus Biosciences, Inc.
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 4, 2026 · Source of record for eligibility and locations