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Atezolizumab

Phase 2

Prostate Adenocarcinoma | Small molecule | Oncology |Arcus Biosciences, Inc.|Last Updated: Jun 4, 2026

Success Probability
Approval Probability 71%
TA Base Rate26%
Adjusted LOA41%
ML RiskLOW_RISK
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Market & Valuation
rNPV $3.2B
Market Size $9.4B
Revenue Basis $1.6B
Competitors 6
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Trial Design
CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment68
FDA Designations
No designations recorded
Clinical Trials (1)
NCT IDTitlePhaseStatusEnrollmentVelocityDesignStartCompletionLast UpdatedSitesCountries
NCT03821246Neoadjuvant Atezolizumab-Based Combination Therapy in Men With Localized Prostate Cancer Prior to Radical ProstatectomyPHASE2 RECRUITING 68Oct 30, 2019Apr 30, 2027Jun 4, 20262 United States
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Study Endpoints
Primary Endpoints
Proportion of subjects who demonstrate a positive response to neoadjuvant atezolizumab and atezolizumab-based combination therapy for each Cohort of the study
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

Secondary Endpoints
Number of treatment-related of adverse events
Up to 12 months
Sum of Pathologic complete response (pCR) and Minimal residual disease (MRD) rate
Up to 12 months
Rate of Pathologic complete response (pCR) rate
Up to 12 months
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Study Design & Arms
AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeTREATMENT
Treatment Arms
ArmTypeDescription
Cohort A (atezolizumab monotherapy)EXPERIMENTALParticipants receive one (1) cycle of atezolizumab, 1200mg intravenously (IV) over 30-60 minutes on day 1 of a 14 day cycle. Radical Prostatectomy (RP) will occur 21 days (+/- 7 days) following the final dose of atezolizumab. No further study therapy will be administered following RP.
Cohort B (atezolizumab, etrumadenant)EXPERIMENTALParticipants will receive one (1) cycle of atezolizumab, 1200mg intravenously (IV) over 30-60 minutes on day 1 of a 14 day cycle and etrumadenant will be taken at a dose of 150mg PO, once daily, until 48 hours prior to RP, for at least 12 days. Radical Prostatectomy (RP) will occur 21 days (+/- 7 days) following the final dose of atezolizumab. No further study therapy will be administered following RP.
Cohort C (atezolizumab, tocilizumab)EXPERIMENTALParticipants will receive one (1) cycle of neoadjuvant atezolizumab and one (1) cycle of tocilizumab, 6mg/kg will be administered IV on day 1 of a 14 day IV prior to RP; atezolizumab will be administered in an identical fashion as Cohort A. RP will occur 21 days (+/- 7 days) following the final dose of atezolizumab. No further study therapy will be administered following RP.
Interventions
NameTypeDescription
AtezolizumabDRUGGiven IV
TocilizumabDRUGGiven IV
EtrumadenantDRUGGiven Orally
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Eligibility Criteria
Age Range18 Years — N/A
SexMALE
Healthy VolunteersNo
Study Sites2

Inclusion Criteria: 1. 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. ...

Countries:United States
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Recent Changes (Last 90 Days)
MEDIUMJun 4, 2026NCT03821246primaryCompletionDate: changed
MEDIUMJun 4, 2026NCT03821246primaryCompletionDate: changed
MEDIUMJun 4, 2026NCT03821246primaryCompletionDate: changed
MEDIUMJun 4, 2026NCT03821246primaryCompletionDate: changed
LOWMay 26, 2026NCT03821246primaryCompletionDate: changed
LOWMay 24, 2026NCT03821246studyFirstPostDate: changed