The purpose of this study is to compare the safety and efficacy of nab-paclitaxel in combination with either gemcitabine or carboplatin to the combination of gemcitabine and carboplatin as first line treatment in female subjects with triple negative metastatic breast cancer (TNMBC) or metastatic triple negative breast cancer.
ABI-007-MBC- 001 is a Phase 2/3, multicenter, open-label, randomized, study that will compare the safety and efficacy of weekly nab-paclitaxel in combination with gemcitabine or carboplatin to the combination of gemcitabine and carboplatin as first line therapy in female subjects with Estrogen Receptor (ER), Progesterone Receptor (PgR), and human epidermal growth factor receptor 2 (HER2) negative (triple negative) metastatic breast cancer (TNMBC) or metastatic triple negative breast cancer. In the phase 2 portion of the study, the combinations of nab-paclitaxel plus gemcitabine and nab-paclitaxel plus carboplatin will be evaluated, and a comparator arm of gemcitabine combined with carboplatin will be used. In the phase 3 portion of the study, the selected nab-paclitaxel combination treatment will be compared to gemcitabine combined with carboplatin to evaluate progression free survival, safety and tolerability, overall survival, disease control rate and duration of response in women with metastatic triple negative breast cancer. Due to changes in the treatment landscape since the initiation of this trial, the decision was made not to proceed to the Phase 3 portion of the study.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
191
nab-Paclitaxel 125 mg/m\^2 by IV administration over 30 minutes on Days 1 and 8 of each 21-day treatment cycle.
Carboplatin at an AUC of 2 on Days 1 and 8 of each 21-day cycle by IV administration
Gemcitabine 1000 mg/m\^2 on Days 1 and 8 of each 21-day treatment cycle.
Ironwood Cancer and Research Center
Chandler, Arizona, United States
Arizona Center for Cancer Care
Glendale, Arizona, United States
Arizona Cancer Research Alliance
Scottsdale, Arizona, United States
Mayo Clinic Arizona
Scottsdale, Arizona, United States
Highlands Oncology Group
Fayetteville, Arkansas, United States
Kaplan-Meier Estimates of Progression-Free Survival (PFS) Based on Investigator Assessment.
PFS was defined as the time from the date of randomization to the date of disease progression or death from any cause on or prior to the data cutoff date for the statistical analysis, whichever occurred earlier. Tumor responses were assessed every 6 weeks using, Response Evaluation Criteria in Solid Tumors (RECIST 1.1) and defined as: Complete response (CR) is the disappearance of all target lesions; Partial response (PR) occurs when at least a 30% decrease in the sum of diameters of target lesions from baseline; Stable disease is neither sufficient shrinkage to qualify for a PR nor sufficient increase of lesions to qualify for Progressive disease (PD); Progressive Disease- is at least a 20% increase in the sum of diameters of target lesions from nadir.
Time frame: From date of randomization to data cut-off date of 16 December 2016; total length of time on study was 31 months for Arm A, 34 months for Arm B and 35 months for Arm C
Percentage of Participants With an Objective Complete or Partial Overall Response by Investigator Assessment.
Percentage of participants with an Objective Complete or Partial Overall Response according to RECIST 1.1 and defined as: Complete response-disappearance of all target lesions; partial response at least a 30% decrease in the sum of diameters of target lesions from baseline; stable disease-neither sufficient shrinkage to qualify for PR nor sufficient increase of lesions to qualify for Progressive disease (PD)• Progressive Disease- At least a 20% increase in the sum of diameters of target lesions from nadir.
Time frame: Disease response was assessed every 6 weeks; from date of randomization to data cut-off date of 16 December 2016; total length of time on study was 31 months for Arm A, 34 months for Arm B and 35 months for Arm C
Percentage of Participants Who Initiated Cycle 6 Receiving Doublet Combination Therapy
The percentage of participants who initiated Cycle 6 receiving doublet combination therapy regardless of the need for dose modifications.
Time frame: Cycle 6
Kaplan-Meier Estimates of Overall Survival
Overall survival was defined as the time from the date of randomization to the date of death (from any cause).
Time frame: From date of randomization to data cut-off date of 16 December 2016; total length of time on study was 31 months for Arm A, 34 months for Arm B and 35 months for Arm C
Number of Participants With Treatment Emergent Adverse Events (TEAEs)
Treatment-emergent adverse events (TEAEs) were defined as any AEs that began or worsened with the onset date on or after the date of the first dose of IP through 28 days after the last dose. A serious AE (SAE) = any AE which results in death; is life-threatening; requires inpatient hospitalization or prolongation of existing hospitalization; results in persistent or significant disability/incapacity; is a congenital anomaly/birth defect; constitutes an important medical event. The severity of AEs was graded based on the participant's symptoms according to the Common Terminology Criteria for Adverse Events (CTCAE, Version 4.0); AEs were evaluated for severity as follows: Grade 1 = Mild - transient or mild discomfort; no medical intervention required; Grade 2 = Moderate - mild to moderate limitation in activity; Grade 3 = Severe; Grade 4 = Life threatening; Grade 5 = Death.
Time frame: From randomization through to 28 days after the last dose of IP; up to data cut off date of 16 Dec 2016; maximum treatment duration of study drug exposure was 108.3 weeks for Arm A, 83 weeks for Arm B, 110.1 weeks for Arm C
Percentage of Participants Experiencing Dose Modifications (Reductions and Interruptions)
The number of participants with dose modifications occurring during the treatment period. Dose reductions and interruptions are typically caused by clinically significant laboratory abnormalities and /or treatment emergent adverse events/toxicities.
Time frame: From randomization through to 28 days after the last dose of IP; up to data-cut off of date of 16 Dec 2016; maximum treatment duration of study drug exposure was 108.3 weeks for Arm A, 83 weeks for Arm B, 110.1 weeks for Arm C
Percentage of Participants Who Discontinued From All Study Treatment Due to TEAEs
Treatment-emergent adverse events (TEAEs) were defined as any AEs that begin or worsen with an onset date on or after the date of the first dose of IP through 28 days after the last dose.
Time frame: From randomization through to 28 days after the last dose of IP; up to data-cut off of date of 16 Dec 2016; maximum treatment duration of study drug exposure was 108.3 weeks for Arm A, 83 weeks for Arm B, 110.1 weeks for Arm C
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Pacific Cancer Medical Center Inc
Anaheim, California, United States
California Cancer Associates for Research and Excellence cCARE
Escondido, California, United States
University of California San Diego Moores Cancer Center
La Jolla, California, United States
Wilshire Oncology Medical Group, Inc
La Verne, California, United States
Translational Research Management
Los Angeles, California, United States
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