A Study to Evaluate the Safety, Pharmacokinetics, and Activity of GDC-1971 in Combination With Atezolizumab in Participants With Locally Advanced or Metastatic Solid Tumors

Genentech

Status and phase: Active, not recruiting; Phase 1

Conditions: Advanced Solid Tumors; Metastatic Solid Tumors

Treatments: Drug: Omeprazole; Drug: GDC-1971; Drug: Atezolizumab

Study type: Interventional

Funder types: Industry

Identifiers

NCT05487235

GO43712

2021-006479-40 (EudraCT Number)

Details and patient eligibility

About

The purpose of this study is to evaluate the safety, pharmacokinetics (PK), and activity of GDC-1971 when administered in combination with atezolizumab in participants with locally advanced or metastatic solid tumors.

The study will have 2 stages- dose finding stage and expansion stage. In expansion stage participants with non-small cell lung cancer programmed death ligand -1 high (NSCLC PD L-1 high), NSCLC PD L-1 low, head and neck squamous cell carcinoma (HNSCC) PD L-1 positive, BRAF wild type (BRAF WT) melanoma and any locally advanced or metastatic solid tumors will be enrolled.

Enrollment: 232 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• Has Eastern Cooperative Oncology Group(ECOG) Performance Status of 0 or 1
• Has Life expectancy >= 12 weeks
• Adequate organ function
• Measurable disease per Response Evaluation Criteria in Solid Tumors, Version 1.1 (RECIST v1.1).

Inclusion Criteria for Dose-Finding Stage:

• Histologically confirmed locally advanced or metastatic solid tumor that has progressed after at least one available standard therapy or for which approved standard therapy has proven to be ineffective or intolerable

Inclusion Criteria for Expansion Stage: NSCLC Cohort

• Histologically confirmed locally advanced or metastatic NSCLC
• Absence of epidermal growth factor receptor (EGFR) and anaplastic lymphoma kinase (ALK)
• PD- L1 positive
• No prior systemic therapy for locally advanced or metastatic NSCLC

Inclusion Criteria for Expansion Stage: HNSCC Cohort

• Histologically confirmed recurrent, or metastatic HNSCC
• PD-L1 positive
• No prior systemic therapy for recurrent or metastatic HNSCC

Inclusion Criteria for Expansion Stage: BRAF WT melanoma Cohort

• Histologically confirmed locally advanced or metastatic or unresectable locally advanced cutaneous BRAF WT melanoma or melanomas of unknown primary that are non-mucosal and non -uveal that has progressed on or after treatment that included anti PD1 or anti PD-L1 therapy

Inclusion Criteria for Expansion Stage: Other Advanced or Metastatic Solid Tumors Cohort

• Histologically confirmed locally advanced or metastatic solid tumor that has progressed after at least one available standard therapy or for which approved standard therapy has proven to be ineffective or intolerable, standard therapy is considered inappropriate, or an investigational agent is a recognized standard of care

Exclusion criteria

• Symptomatic, untreated, or actively progressing central nervous system (CNS) metastases.
• Has leptomeningeal disease or carcinomatous meningitis
• Has uncontrolled hypertension
• Has left ventricular ejection fraction < institutional lower limit of normal or < 50%
• Has clinically significant history of liver disease including viral or other hepatitis, current alcohol abuse, or cirrhosis
• Has an active or history of autoimmune disease or immune deficiency including myasthenia gravis, myositis, autoimmune hepatitis, systemic lupus erythematosus, rheumatoid arthritis, inflammatory bowel disease, vascular thrombosis associated with antiphospholipid syndrome, Wegener's granulomatosis, Sjögren's syndrome, Guillain-Barré syndrome, multiple sclerosis, vasculitis, or multiple sclerosis. Participants with a history of autoimmune- related hypothyroidism on thyroid replacement hormone or with controlled Type I diabetes mellitus on a stable dose of an insulin regimen are eligible for this study

Trial design

Primary purpose: Treatment

Allocation: Non-Randomized

Interventional model: Sequential Assignment

Masking: None (Open label)

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232 participants in 2 patient groups

Dose-finding Stage: GDC-1971

Experimental group

Description:

Participants will receive GDC-1971 tablet or capsule at assigned dose, orally once daily (QD) on Days 1-21 of each cycle, along with atezolizumab 1200 milligrams (mg) intravenous (IV) infusion once every 3 weeks (Q3W), until unacceptable toxicity or loss of clinical benefit. A subset of participants will participate in evaluations regarding tablet versus (vs) capsule formulations.

Treatment:

Drug: Atezolizumab

Drug: GDC-1971

Expansion Stage: GDC-1971

Experimental group

Description:

Participants will receive GDC-1971 orally at the assigned dose QD on Days 1-21 of each cycle and atezolizumab 1200 mg IV on Day 1 of each cycle until unacceptable toxicity or loss of clinical benefit. A subset of participants will participate in evaluations regarding tablet vs capsule formulation, the effect of food and acid-reducing agents on GDC-1971.

Treatment:

Drug: Atezolizumab

Drug: GDC-1971

Drug: Omeprazole