This is a Phase II, multicenter, randomized, placebo-controlled, double-blind study to evaluate the safety and efficacy of MOXR0916 in combination with atezolizumab versus placebo and atezolizumab in participants with locally advanced or metastatic urothelial carcinoma (UC) who have not received prior systemic therapy in the locally advanced/metastatic setting and who are ineligible to receive cisplatin-based therapy.
The study design has been amended after the decision to prematurely stop patient accrual due to enrollment challenges. As only 5 participants were enrolled, the study blinding will not be maintained, and placebo infusions will not be administered. Patients assigned to the MOXR0916 arm may continue study treatment with the combination of atezolizumab and MOXR0916 or with atezolizumab alone based on a discussion of benefit and risk with the treating investigator.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
5
MOXR0916, 300 milligram (mg) by intravenous (IV) infusion on Day 1 of each 21-day cycle.
Atezolizumab, 1200 mg by intravenous (IV) infusion on Day 1 of each 21-day cycle.
Arizona Oncology - HOPE Wilmot
Tucson, Arizona, United States
University of Colorado
Denver, Colorado, United States
Yale University
New Haven, Connecticut, United States
Miami Cancer Institute of Baptist Health, Inc.
Miami, Florida, United States
University of Chicago; Hematology/Oncology
Chicago, Illinois, United States
Kansas City - Menorah Medical Center
Kansas City, Kansas, United States
Maryland Oncology Hematology, P.A.
Columbia, Maryland, United States
Nebraska Methodist Hospital; Cancer Center
Omaha, Nebraska, United States
New York Oncology Hematology, P.C.
Albany, New York, United States
Columbia University Medical Center; Clinical Research Management Office
New York, New York, United States
...and 12 more locations
Progression-Free Survival (PFS)
PFS is defined as the time from randomization to the first occurrence of disease progression or death from any cause, whichever occurs first. Per RECIST v1.1, progressive disease is defined as at least a 20% increase in the sum of diameters of target lesions, taking as reference the smallest sum of diameters on study (including baseline); and an absolute increase of \>= 5 millimeter (mm) in the sum of diameters.
Time frame: Up to approximately 45 months
Overall Survival (OS)
Kaplan Meier estimate of median OS was defined as the time at which half of the participants had died, regardless of the cause of death.
Time frame: Up to approximately 45 months
Objective Response (OR) According to RECIST v1.1
OR is defined as a complete response (CR) or partial response (PR) on two consecutive occasions \>= 4 weeks apart, as determined by the investigator according to RECIST v1.1. CR is defined as the disappearance of all target lesions. PR is defined as at least a 30% decrease in the sum of diameters of all target lesions, taking as reference the baseline sum of diameters, in the absence of CR.
Time frame: Up to approximately 45 months
Duration of Objective Response (DOR) According to RECIST v1.1
DOR is defined as the time from the first occurrence of a documented objective response to disease progression or death from any cause, whichever occurs first, as determined by the investigator according to RECIST v1.1. Objective response is defined as a complete response (CR) or partial response (PR) on two consecutive occasions ≥ 4 weeks apart. CR is defined as the disappearance of all target lesions. PR is defined as at least a 30% decrease in the sum of diameters of all target lesions, taking as reference the baseline sum of diameters, in the absence of CR.
Time frame: Up to approximately 45 months
Time to Pain Progression, Pain Palliation, and Fatigue Progression as Measured by Participant-Reported Severity According to the M. D. Anderson Symptom Inventory (MDASI)
The MDASI is a cancer-related, self-reported questionnaire consisting of 19 items assessing symptom severity and interference with different aspects of a participant's life. The MDASI items are rated from 0 to 10, with 0 indicating that the symptom is either not present or does not interfere with the participant's activities and 10 indicating that the symptom is "as bad as you can imagine" or "interfered completely" with the participant's life.
Time frame: Up to approximately 45 months
Percentage of Participants Reporting Symptom Interference With Daily Living at the Time of Progression According to the MDASI
The MDASI is a cancer-related, self-reported questionnaire consisting of 19 items assessing symptom severity and interference with different aspects of a participant's life. The MDASI items are rated from 0 to 10, with 0 indicating that the symptom is either not present or does not interfere with the participant's activities and 10 indicating that the symptom is "as bad as you can imagine" or "interfered completely" with the participant's life.
Time frame: Up to approximately 45 months
Percentage of Participants With Adverse Event (AEs)
An adverse event is any untoward medical occurrence, regardless of causal attribution.
Time frame: Up to approximately 45 months
Area Under the Plasma Drug Concentration-time Curve (AUC) of MOXR0916 and Atezolizumab
AUC represents the body's exposure to an administered drug.
Time frame: Cycle 1 (each cycle is 21 days), Day 1: predose and 30 min. after atezolizumab infusion; Cycle 1, on Days 8 and 15. Cycles 2 4, Day 1: predose and 30 min. after atezolizumab infusion. Cycles 8, 12, and 16: predose
Maximum Plasma Concentration (Cmax) of MOXR0916 and Atezolizumab
Cmax refers to the maximum (or peak) serum concentration that a drug achieves in a specified compartment or test area of the body after the drug has been administrated and prior to the administration of a second dose.
Time frame: Cycle 1 (each cycle is 21 days), Day 1: predose and 30 min. after atezolizumab infusion; Cycle 1, on Days 8 and 15. Cycles 2 4, Day 1: predose and 30 min. after atezolizumab infusion. Cycles 8, 12, and 16: predose
Minimum Plasma Concentration (Cmin) of MOXR0916 and Atezolizumab
Cmin refers to the minimum (trough) serum concentration of a drug in a specified compartment or test area of the body.
Time frame: Cycle 1 (each cycle is 21 days), Day 1: predose and 30 min. after atezolizumab infusion; Cycle 1, on Days 8 and 15. Cycles 2 4, Day 1: predose and 30 min. after atezolizumab infusion. Cycles 8, 12, and 16: predose
Clearance of MOXR0916 and Atezolizumab
Clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes.
Time frame: Cycle 1 (each cycle is 21 days), Day 1: predose and 30 min. after atezolizumab infusion; Cycle 1, on Days 8 and 15. Cycles 2 4, Day 1: predose and 30 min. after atezolizumab infusion. Cycles 8, 12, and 16: predose
Percentage of Participants With Anti-Therapeutic Antibodies (ATAs) to MOXR0916 and Atezolizumab
ATAs may be produced by the body in response to an administered drug.
Time frame: Cycles 1 - 4 and 8, 12, and 16 (each cycle is 21 days), Day 1: predose
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