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About
This phase II trial studies the effects of temozolomide and atezolizumab as second or third line treatment for patients with small cell lung cancer that has spread to other places in the body (metastatic) or has come back (recurrent). Chemotherapy drugs, such as temozolomide, work in different ways to stop the growth of tumor cells, either by killing the cells, by stopping them from dividing, or by stopping them from spreading. 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. Giving temozolomide and atezolizumab as second or third line treatment may help prolong survival in patients with small cell lung cancer.
Full description
PRIMARY OBJECTIVE:
I. To estimate the efficacy of atezolizumab and temozolomide in two dosing schedules for patients with metastatic small-cell lung cancer (SCLC) who progress after chemoimmunotherapy.
SECONDARY OBJECTIVES:
I. To evaluate the safety profile and toxicity of combination atezolizumab and temozolomide in two dosing schedules as per Common Terminology Criteria for Adverse Events (CTCAE) version (v) 5.0.
II. To evaluate the progression free survival (PFS) and overall survival (OS) of patients treated with combination atezolizumab and temozolomide.
III. To evaluate the intracranial PFS rate at 6 months (icPFS6) of patients with SCLC treated with atezolizumab and temozolomide.
CORRELATIVE/EXPLORATORY OBJECTIVES:
I. Explore association of myeloid-derived suppressor cell (MDSC) levels at baseline biomarker status from tumor biopsy samples and peripheral blood and correlate these with clinical parameters (including overall response rate [ORR], OS and toxicity).
II. To evaluate changes in MDSC induced by different dosing of temozolomide. III. To explore post-translational modifications of PD-L1 by mass spectrometry.
OUTLINE: Patients are randomized to 1 of 2 cohorts.
COHORT I: Patients receive atezolizumab intravenously (IV) over 30-60 minutes on day 1 and temozolomide orally (PO) once daily (QD) on days 1-5. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
COHORT II: Patients receive atezolizumab IV over 30-60 minutes on day 1. Patients also receive temozolomide PO QD on days 1-14 of cycle 1 and days 1-21 of subsequent cycles. Cycles repeat every 28 days in the absence of disease progression or unacceptable toxicity.
After completion of study treatment, patients are followed up at 30 days and every 3 months thereafter.
Enrollment
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Inclusion criteria
Written informed consent and Health Insurance Portability and Accountability Act (HIPAA) authorization for release of personal health information
Age >= 18 years at the time of consent
Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 2 within 28 days prior to registration
Have histologically or cytologically-documented diagnosis of extensive stage (i.e. metastatic and/or recurrent) small cell lung cancer and have progressed or recurred after platinum-based chemotherapy with immunotherapy. Eligible patients will be defined as follows:
Measurable disease according to Response Evaluation Criteria in Solid Tumors (RECIST) v1.1 within 28 days prior to registration
Maximum of 3 prior lines of systemic therapy is allowed in the setting of metastatic disease. Patients who recur after treatment for limited state disease, and who receive first line metastatic treatment with chemo-immunotherapy would be considered eligible upon progression on chemo-IO in the metastatic setting
Absolute neutrophil count (ANC) >= 1.5 K/mm^3 (obtained within 28 days prior to registration)
Platelets >= 100,000 / mcL (obtained within 28 days prior to registration)
Serum creatinine =< 2.0 X upper limit of normal (ULN) OR measured or calculated creatinine clearance (glomerular filtration rate [GFR] can also be used in place of creatinine or creatinine clearance [CrCl]) >= 50 mL/min as estimated by Cockcroft and Gault formula for subject with creatinine levels > 2 x institutional ULN (obtained within 28 days prior to registration)
Bilirubin =< 1.5 X ULN OR direct bilirubin =< ULN for subjects with total bilirubin levels > 1.5 ULN
Aspartate aminotransferase (AST) and Alanine aminotransferase (ALT) =< 3 X ULN OR =< 5 X ULN for subjects with liver metastases (obtained within 28 days prior to registration)
Albumin > 2.5 g/dL (obtained within 28 days prior to registration)
International normalized ratio (INR) or prothrombin time (PT) =< 1.5 x ULN for patients not receiving therapeutic anticoagulation (obtained within 28 days prior to registration)
Activated partial thromboplastin time (aPTT) =< 1.5 x ULN for patients not receiving therapeutic anticoagulation (obtained within 28 days prior to registration)
Females of childbearing potential must have a negative serum or urine pregnancy test within 14 days prior to registration
For women of childbearing potential: agreement to remain abstinent (refrain from vaginal intercourse) or use contraceptive methods and agreement to refrain from donating eggs, as defined below:
For men able to father a child: agreement to remain abstinent (refrain from vaginal intercourse) or use a condom, and agreement to refrain from donating sperm, as defined below:
As determined by the enrolling physician or protocol designee, ability of the subject to understand and comply with study procedures for the entire length of the study
Availability of archival tissue, preferably a recent formalin-fixed, paraffin-embedded (FFPE) tumor tissue block. A recently obtained archival FFPE tumor tissue block from a primary or metastatic tumor resection or biopsy can be provided if it was obtained within 1 year of trial screening. Patients with tumor specimens older than 1 year, or who do not have biopsy specimen may still be eligible if deemed so by the sponsor-investigator.
Be willing to provide peripheral blood samples at specified time-points during the study
Life expectancy greater than 3 months as determined by the enrolling physician or protocol designee
Ability to swallow and retain oral medication
Exclusion criteria
Is currently participating and receiving study therapy or has participated in a study of an investigational agent and received study therapy or used an investigational device within 4 weeks of the first dose of treatment
Has received prior temozolomide therapy
Patients with a prior or concurrent malignancy whose natural history or treatment has the potential to interfere with the safety or efficacy assessment of the investigational regimen are not eligible for this trial
Symptomatic central nervous system (CNS) metastases or untreated or actively progressing CNS metastases. Subjects with asymptomatic CNS metastases (treated or untreated) will be eligible provided all of the following criteria are met.
Measurable disease, per RECIST v1.1, must be present outside the CNS.
The patient has no history of intracranial hemorrhage or spinal cord hemorrhage.
The patient has not undergone stereotactic radiotherapy within 7 days prior to initiation of study treatment, whole-brain radiotherapy within 14 days prior to initiation of study treatment, or neurosurgical resection within 28 days prior to initiation of study treatment.
The patient has no ongoing requirement for corticosteroids as therapy for CNS disease at the time of study treatment.
If the patient is receiving anti-convulsant therapy, the dose is considered stable and appropriate by the treating physician.
Metastases are limited to the cerebellum or the supratentorial region (i.e., no metastases to the midbrain, pons, medulla, or spinal cord).
Clinically significant acute infection requiring systemic antibacterial, antifungal, or antiviral therapy including:
Has had prior chemotherapy, immunotherapy, targeted small molecule therapy, or radiation therapy within 2 weeks prior to study day 1 or who has not recovered (i.e., =< grade 1 or at baseline) from adverse events due to a previously administered agent
Active or history of autoimmune disease or immune deficiency, including, but not limited to, myasthenia gravis, myositis, autoimmune hepatitis, systemic lupus erythematosus, rheumatoid arthritis, inflammatory bowel disease, antiphospholipid antibody syndrome, Wegener granulomatosis, Sjogren syndrome, Guillain-Barre syndrome, or multiple sclerosis, with the following exceptions:
Replacement therapy (eg., thyroxine, insulin, or physiologic corticosteroid replacement therapy for adrenal or pituitary insufficiency, etc.) is not considered a form of systemic treatment
Patients with controlled type 1 diabetes mellitus who are on an insulin regimen are eligible for the study
Patients with eczema, psoriasis, lichen simplex chronicus, or vitiligo with dermatologic manifestations only (e.g., patients with psoriatic arthritis are excluded) are eligible for the study provided all of following conditions are met:
History of idiopathic pulmonary fibrosis, organizing pneumonia (e.g., bronchiolitis obliterans), drug-induced pneumonitis, or idiopathic pneumonitis, or evidence of active pneumonitis on screening chest computed tomography (CT) scan. History of radiation pneumonitis in the radiation field (fibrosis) is permitted
Significant cardiovascular disease (such as New York Heart Association Class II or greater cardiac disease, myocardial infarction, or cerebrovascular accident) within 3 months prior to initiation of study treatment, unstable arrhythmia, or unstable angina
Has known psychiatric or substance abuse disorders that would interfere with cooperation with the requirements of the trial
Treatment with a live, attenuated vaccine within 4 weeks prior to initiation of study treatment
Pregnant or breastfeeding (NOTE: breast milk cannot be stored for future use while the mother is being treated on study)
Has a history or current evidence of any condition, therapy, or laboratory abnormality that might confound the results of the trial, interfere with the subject's participation for the full duration of the trial, or is not in the best interest of the subject to participate, in the opinion of the treating investigator
History of severe allergic anaphylactic reactions to chimeric or humanized antibodies or fusion proteins
Known hypersensitivity to Chinese hamster ovary cell products or to any component of the atezolizumab formulation
Uncontrolled pleural effusion, pericardial effusion, or ascites requiring recurrent drainage procedures (more than once monthly). Patients with indwelling catheters (e.g., PleurX) are allowed.
Uncontrolled or symptomatic hypercalcemia (ionized calcium > 1.5 mmol/L, calcium >12 mg/dL or corrected serum calcium > ULN)
History of leptomeningeal disease
Primary purpose
Allocation
Interventional model
Masking
56 participants in 2 patient groups
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Central trial contact
Dwight Owen; Kimberly Cameron
Data sourced from clinicaltrials.gov
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