This open-label, multicenter study will evaluate the safety, tolerability, and pharmacokinetics of MEHD7945A in combination with chemotherapy (either cisplatin plus 5-FU or carboplatin plus paclitaxel) in participants with previously untreated R/M SCCHN. There are two stages for each arm in this study: a Dose-limiting Toxicity (DLT)-evaluation stage (Stage I) and a cohort-expansion stage (Stage II). In Stage I, DLTs will be assessed during a DLT Assessment Window of 21 days (i.e., Cycle 1 Day 1 through Cycle 1 Day 21) for both arms. In Stage II, participants will be enrolled to further characterize the safety, pharmacokinetics, and anti-tumor activity of MEHD7945A in combination with cisplatin + 5-FU or carboplatin + paclitaxel at the identified recommended Phase II dose.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
24
5-FU will be administered as per schedule specified in the respective arm.
Carboplatin will be administered as per schedule specified in the respective arm.
Cisplatin will be administered as per schedule specified in the respective arm.
MEHD7945A will be administered as per schedule specified in the respective arms.
Paclitaxel will be administered as per schedule specified in the respective arm.
University of Colorado Cancer Center Department of Hematology
Aurora, Colorado, United States
University of Chicago; Hematology/Oncology
Chicago, Illinois, United States
Massachusetts General Hospital;Hematology/ Oncology
Boston, Massachusetts, United States
Cliniques Universitaires St-Luc
Brussels, Belgium
UZ Antwerpen
Edegem, Belgium
UZ Leuven Gasthuisberg
Leuven, Belgium
Percentage of Participants With DLTs
Time frame: Cycle 1 Day 1 through Cycle 1 Day 21 (Cycle length = 3 weeks)
Percentage of Participants with Adverse Events
Time frame: From Baseline until 45 days after last dose of study drug or until initiation of another anti-cancer therapy, withdrawal or lost to follow-up, whichever occurs first (up to approximately 3 years)
Area Under Concentration-Time Curve From Day 1 to 21 (AUC0-21d) of MEHD7945A
Time frame: Pre-infusion (0 hour), 30 minutes post-infusion (infusion duration=90 minutes) on Day 1 of Cycles 1, 2, 3, 4, 8; 4 hours post-infusion on Day 1 of Cycle 1; Days 2, 4, 8, 15 of Cycle 1 (each cycle = 3 weeks)
Maximum Serum Concentration (Cmax) of MEHD7945A
Time frame: 30 minutes and 4 hours post-infusion (infusion duration=90 minutes) on Day 1 of Cycle 1; 30 min post-infusion on Day 1 of Cycles 2, 3, 4, and 8 (each cycle = 3 weeks)
Minimum Serum Concentration (Cmin) of MEHD7945A
Time frame: Pre-infusion (0 hour) on Day 1 of Cycles 1, 2, 3, 4, and 8 (each cycle = 3 weeks)
Cmax of Cisplatin
Time frame: Pre-infusion (0 hour), 0 to 5 minutes and 1, 2, 4, 6 hours post-infusion (infusion duration = 1-2 hours) on Day 1 of Cycle 1 (Cycle length = 3 weeks)
Area Under Concentration-Time Curve From 0 to 6 Hours (AUC0-6h) of Cisplatin
Time frame: Pre-infusion (0 hour), 0 to 5 minutes and 1, 2, 4, 6 hours post-infusion (infusion duration = 1-2 hours) on Day 1 of Cycle 1 (Cycle length = 3 weeks)
Plasma Concentrations of 5-FU
Time frame: Pre-infusion (0 hour) on Day 1 of Cycle 1; Day 2 of Cycle 1 (Cycle length = 3 weeks)
Cmax of Carboplatin
Time frame: Pre-infusion (0 hour), 0 to 5 minutes and 1, 2, 4, 6 hours post-infusion (infusion duration = 15-30 minutes) on Day 1 of Cycle 1 (Cycle length = 3 weeks)
AUC0-6h of Carboplatin
Time frame: Pre-infusion (0 hour), 0 to 5 minutes and 1, 2, 4, 6 hours post-infusion (infusion duration = 15-30 minutes) on Day 1 of Cycle 1 (Cycle length = 3 weeks)
Cmax Normalized by Dose (Cmax/D) of Carboplatin
Time frame: Pre-infusion (0 hour), 0 to 5 minutes and 1, 2, 4, 6 hours post-infusion (infusion duration = 15-30 minutes) on Day 1 of Cycle 1 (Cycle length = 3 weeks)
AUC0-6h Normalized by Dose (AUC0-6h/D) of Carboplatin
Time frame: Pre-infusion (0 hour), 0 to 5 minutes and 1, 2, 4, 6 hours post-infusion (infusion duration = 15-30 minutes) on Day 1 of Cycle 1 (Cycle length = 3 weeks)
Cmax of Paclitaxel
Time frame: Pre-infusion (0 hour), 0 to 5 minutes and 1, 3, 5 hours post-infusion (infusion duration = 3 hours) on Day 1 of Cycle 1, Day 2 of Cycle 1 (Cycle length = 3 weeks)
Area Under Concentration-Time Curve From 0 to 24 Hours (AUC0-24h) of Paclitaxel
Time frame: Pre-infusion (0 hour), 0 to 5 minutes and 1, 3, 5 hours post-infusion (infusion duration = 3 hours) on Day 1 of Cycle 1, Day 2 of Cycle 1 (Cycle length = 3 weeks)
Plasma Half-Life (t1/2) of Paclitaxel
Time frame: Pre-infusion (0 hour), 0 to 5 minutes and 1, 3, 5 hours post-infusion (infusion duration = 3 hours) on Day 1 of Cycle 1, Day 2 of Cycle 1 (Cycle length = 3 weeks)
Percentage of Participants With Anti-Therapeutic Antibodies to MEHD7945A
Time frame: Pre-dose (0 hour) on Day 1 of Cycles 1, 4, 8 (each cycle = 3 weeks) and at study completion (approximately 3 years)
Percentage of Participants With Objective Response (Complete Response [CR] or Partial Response [PR]) as Assessed by Modified Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST v1.1)
Time frame: From first dose of study drug until disease progression or death (up to approximately 3 years)
Percentage of Participants With Disease Control (CR or PR or Stable Disease [SD]) as Assessed by Modified RECIST v1.1 Criteria
Time frame: From first dose of study drug until disease progression or death (up to approximately 3 years)
Duration of Objective Response (CR or PR) as Assessed by Modified RECIST v1.1 Criteria
Time frame: From first occurrence of CR or PR until relapse or death (up to approximately 3 years)
Progression-Free Survival as Assessed by Modified RECIST v1.1 Criteria
Time frame: From first dose of study drug until disease progression or death (up to approximately 3 years)
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