This phase Ib/II trial tests the safety, best dose and how well gemcitabine and ex vivo expanded allogenic universal donor TGFBi NK cells with or without naxitamab work for the treatment of patients with GD2 expressing, HER2 negative breast cancer that has spread from where it first started (primary site) to other places in the body (metastatic). Gemcitabine is a chemotherapy drug that blocks the cells from making deoxyribonucleic acid (DNA) and may kill cancer cells. TGFBi NK cells are manufactured cells that are a part of your natural immunity. NK cells can recognize missing or incorrect proteins on tumor cells and then eliminate these tumor cells and TGFBi NK cells are created to be able to better kill the tumor cells. Naxitamab is a monoclonal antibody that targets GD2, which is a protein or sugar present on tumor cells but not very commonly found on normal cells. This antibody helps draw the attention of the immune system to the tumor cells that have GD2 to help attack the tumor cells. Giving gemcitabine and TGFBi NK cells with or without naxitamab may kill more tumor cells in patients with metastatic GD2 expressing, HER2 negative breast cancer.
PRIMARY OBJECTIVES: I. To evaluate the safety of gemcitabine plus transforming growth factor beta imprinted natural killer (TGFBi NKs) +/- naxitamab in metastatic breast cancer. II. To evaluate the objective response rate of gemcitabine plus TGFB NKs +/- naxitamab in metastatic breast cancer. SECONDARY OBJECTIVES: I. To determine if TGFB NK cells are detectable in the peripheral blood 5 days following infusion (C1D21). II. To determine if gemcitabine plus TGFB NKs +/- naxitamab improves median progression-free survival (PFS) in metastatic breast cancer over historical controls for gemcitabine alone. EXPLORATORY OBJECTIVES: I. Peripheral blood mononuclear cells (PBMCs) Ia. Real-time blood immune profiling Ib. Antigen specific immune responses II. Plasma/Serum IIa. TCR clonality IIb. Cytokines (IFNy, IL-10, IL-12, IL-2, IL4, etc) and chemokines IIc. Antigen specific immune responses III. Archival tissue IIIa. GD2 expression on tumor IIIb. Immunohistochemistry/multispectral imaging IIIc. Tumor mutational burden OUTLINE: Patients are assigned to 1 of 4 arms. ARM I: Patients receive gemcitabine intravenously (IV) over 30 minutes on days 1, 8, and 15 of each cycle. Cycles repeat every 28 days for up to 1 year in the absence of disease progression or unacceptable toxicity. Patients receive TGFBi NK cells IV over 10-30 minutes on day 16 of cycle 1. ARM II: Patients receive gemcitabine IV over 30 minutes on days 1, 8, and 15 of each cycle. Cycles repeat every 28 days for up to 1 year in the absence of disease progression or unacceptable toxicity. Patients receive TGFBi NK cells IV over 10-30 minutes on day 16 and 18 of cycle 1. ARM III: Patients receive gemcitabine IV over 30 minutes on days 1, 8, and 15 of each cycle followed by naxitamab IV over 30-60 minutes on days 1, 4, and 8 of each cycle. Cycles repeat every 28 days for up to 1 year in the absence of disease progression or unacceptable toxicity. Patients receive TGFBi NK cells IV over 10-30 minutes on day 16 of cycle 1. ARM IV: Patients receive gemcitabine IV over 30 minutes on days 1, 8, and 15 of each cycle followed by naxitamab IV over 30-60 minutes on days 1, 4, and 8 of each cycle. Cycles repeat every 28 days for up to 1 year in the absence of disease progression or unacceptable toxicity. Patients receive TGFBi NK cells IV over 10-30 minutes on day 16 and 18 of cycle 1. Patients undergo computed tomography and blood sample collection and may undergo magnetic resonance imaging (MRI) throughout the study. After completion of study treatment, patients are followed up within 30 days of stopping treatment and every 3 months for 1 year.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
42
Undergo blood sample collection
Undergo CT scan
Given IV
Undergo MRI
Given IV
Given IV
Ohio State University Comprehensive Cancer Center
Columbus, Ohio, United States
RECRUITINGIncidence of adverse events
Will be summarized descriptively with reporting of any dose limiting toxicities (DLTs) in these initial patients. In addition, to DLTs, serious adverse events (SAEs) and immune related adverse events of interest will be reported. Will be summarized descriptively and graphically, with reporting the outcome measures indicated along with two-tailed 95% confidence intervals (CIs). Number and frequency of patients experiencing each adverse event (AE) type and grade will tabulated, among patients evaluable for toxicity. The number (%) of patients experiencing at least one grade 3 to 5 AE will be reported with 95% CI.
Time frame: Up to 1 year after completion of study medication
Objective response rate
Will be estimated in each arm using two-sided 80% and 95% CI about the observed percentages of response (PR+CR).
Time frame: Up to 1 year after completion of study medication
Transforming growth factor beta imprinted natural killer (TGFBi NK) cell detection
TGFBi NK cell persistence will be defined as the presence (detectable donor TGFBi NK cells) or the absence (no detectable donor TGFBi NK cells). Data will be described numerically as percentage of donor cells in blood and will be correlated to clinical outcomes.
Time frame: At day 5 following infusion
Progression free survival
Will be estimated using a Kaplan-Meier curve and the median PFS will be reported along with a 95% confidence interval, separately by arm, based on the patients who are enrolled in the evaluation of clinical response.
Time frame: From start of treatment to time of progression or death, whichever occurs first, up to 1 year after completion of study medication
The Ohio State University Comprehensive Cancer Center
CONTACT
This platform is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional.