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Phase 1/1b Study to Evaluate the Safety and Tolerability of Ciforadenant Alone and in Combination With Atezolizumab in Advanced Cancers

A Phase 1/1b, Open-Label, Multicenter, Repeat-Dose, Dose-Selection Study of Ciforadenant as Single Agent and in Combination With Atezolizumab in Patients With Selected Incurable Cancers

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02655822
Enrollment
502
Registered
2016-01-14
Start date
2016-01-31
Completion date
2021-07-31
Last updated
2021-08-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Metastatic Castration Resistant Prostate Cancer, Renal Cell Cancer

Keywords

RCC, Kidney Cancer, mCRPC, Prostate Cancer

Brief summary

This is a phase 1/1b open-label, multicenter, dose-selection study of ciforadenant, an oral small molecule targeting the adenosine-A2A receptor on T-lymphocytes and other cells of the immune system. This trial will study the safety, tolerability, and anti-tumor activity of ciforadenant as a single agent and in combination with atezolizumab, a PD-L1 inhibitor against various solid tumors. Ciforadenant blocks adenosine from binding to the A2A receptor. Adenosine suppresses the anti-tumor activity of T cells and other immune cells.

Detailed description

This is a phase 1/1b open-label, multicenter, dose-selection study of ciforadenant, an oral small molecule targeting the adenosine-A2A receptor on T-lymphocytes and other cells of the immune system. This trial will study the safety, tolerability, and anti-tumor activity of ciforadenant as a single agent and in combination with atezolizumab, an intravenous PD-L1 inhibitor. Ciforadenant blocks adenosine from binding to the A2A receptor. Adenosine suppresses the anti-tumor activity of T cells and other immune cells.

Interventions

100 mg orally twice daily for the first 14 days of each 28-day cycle.

DRUGCiforadenant + atezolizumab

Ciforadenant 100 mg orally twice daily in combination with atezolizumab intravenously.

Sponsors

Genentech, Inc.
CollaboratorINDUSTRY
Corvus Pharmaceuticals, Inc.
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

Renal Cell Carcinoma Inclusion Criteria 1. Eastern Cooperative Oncology Group (ECOG) Performance Status 0-2. 2. Documented pathologic diagnosis of clear cell RCC. 3. Relapsed or refractory to 1-2 prior lines of therapy containing at least an anti-PD-(L)1 agent. 4. Measurable disease according to RECIST v1.1 5. Mandatory newly collected tumor biopsy sample obtained prior to treatment initiation. Renal Cell Carcinoma

Exclusion criteria

1. History of severe hypersensitivity reaction to monoclonal antibodies. 2. Has immunodeficiency or requires treatment with systemic immunosuppressive medication within 2 weeks prior to initiation of study treatment or anticipation of need for systemic immunosuppressant medication during study treatment. 3. Has an active autoimmune disease requiring systemic treatment with in the past 2 years OR a documented history of clinically severe autoimmune disease. Metastatic Castration-Resistant Prostate Cancer Inclusion Criteria 1. Documentation of disease: progressive CRPC with histologically or cytologically confirmed adenocarcinoma of the prostate. 2. Patients must have radiologically evident metastatic disease, but it can be measurable or non-measurable disease: * Measurable disease: nodal, visceral, or extra nodal lesions according to RECIST v1.1 using a diagnostic computed tomography * Non-measurable disease: bone only disease (up to 1/3 of study population) per PCWG3 criteria 3. 1-3 prior lines of therapy, including at least one newer generation androgen synthesis inhibitor (e.g., abiraterone) or androgen receptor antagonist (e.g., enzalutamide, apalutamide, darolutamide). 4. Mandatory newly collected tumor biopsy sample obtained prior to treatment initiation. 5. Eastern Cooperative Oncology Group (ECOG) Performance Status 0-2. Metastatic Castration-Resistant Prostate Cancer

Design outcomes

Primary

MeasureTime frame
Incidence of dose-limiting toxicities (DLTs) of ciforadenant as a single agent and in combination with atezolizumab28 days following first administration of ciforadenant
Objective response rate per RECIST v1.1 criteria of ciforadenant as a single agent and in combination with atezolizumabFrom start of treatment to end of treatment, up to 72 months
Incidence of treatment-emergent adverse events, as assessed by NCI CTCAE v.4.03, of ciforadenant as a single agent and in combination with atezolizumabContinuously, up to 72 months
Mean and median Area under the curve (AUC) of ciforadenantUp to 12 months
Mean and median Maximum concentration (Cmax) of ciforadenantUp to 12 months
Identify the MDL (maximum dose level) of single agent ciforadenantFrom start of treatment to end of treatment, up to 72 months.

Countries

Australia, Canada, United States

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 26, 2026