1. Patritumab with Cetuximab plus Platinum-Containing Therapy in Recurrent or Metastatic Squamous Cell Carcinoma of the Head and Neck: An Open-Label, Phase Ib Study
- Author
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Kevin J. Harrington, Jeanne Mendell, Robert A. Beckman, Anne Jennings, Nicholas F. Brown, Shuquan Chen, Marivic Ricamara, Magnus T. Dillon, Heather Shaw, Jonathan Greenberg, Katie L. Newbold, Martin Forster, and Lorna Grove
- Subjects
0301 basic medicine ,Adult ,Male ,Cancer Research ,medicine.medical_specialty ,Patritumab ,Cetuximab ,Antibodies, Monoclonal, Humanized ,Gastroenterology ,Loading dose ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,Pharmacokinetics ,Recurrence ,Internal medicine ,Antineoplastic Combined Chemotherapy Protocols ,medicine ,Humans ,Progression-free survival ,Neoplasm Metastasis ,Aged ,Neoplasm Staging ,Platinum ,business.industry ,Maintenance dose ,Squamous Cell Carcinoma of Head and Neck ,Area under the curve ,Middle Aged ,Prognosis ,Carboplatin ,030104 developmental biology ,Treatment Outcome ,Oncology ,chemistry ,030220 oncology & carcinogenesis ,Female ,business ,Broadly Neutralizing Antibodies ,medicine.drug - Abstract
Purpose: Patritumab plus cetuximab with platinum as first-line therapy for patients with recurrent and/or metastatic (R/M) squamous cell carcinoma of the head and neck (SCCHN) was evaluated for safety and to determine the recommended phase II combination dose. Patients and Methods: Patients aged ≥18 years with confirmed R/M SCCHN received intravenous patritumab (18 mg/kg loading dose; 9 mg/kg maintenance dose every 3 weeks) + cetuximab (400 mg/m2 loading dose; 250 mg/m2 maintenance dose weekly) + cisplatin (100 mg/m2 every 3 weeks) or carboplatin (AUC of 5) for six cycles or until toxicity, disease progression, or withdrawal. Primary endpoints were dose-limiting toxicities [DLT; grade ≥3 (21-day observation period)] and treatment-emergent adverse events (TEAE). Pharmacokinetics, human antihuman antibodies (HAHA), tumor response, progression-free survival (PFS), and overall survival (OS) were assessed. Results: Fifteen patients completed a median (range) of 8.7 (2.0–20.7) patritumab cycles. No DLTs were reported. Serious adverse events were reported in 9 patients (patritumab-related n = 4). TEAEs (N = 15 patients) led to patritumab interruption in 7 patients. Patritumab-related dose reductions were reported in 1 patient. Patritumab (18 mg/kg) pharmacokinetics (N = 15) showed mean (SD) AUC0–21d of 2,619 (560) μg/day/mL and maximum concentration of 499.9 (90.4) μg/mL. All patients were HAHA-negative at study end (single, transient low titer in 1 patient). Tumor response rate (complete plus partial response; N = 15) was 47%. Median (95% confidence interval) PFS and OS (N = 15) were 7.9 (3.7–9.7) and 13.5 (6.6–17.5) months, respectively. Conclusions: Patritumab (18 mg/kg loading dose, 9 mg/kg maintenance dose) plus cetuximab/platinum was tolerable, active in SCCHN, and selected as the phase II dose regimen.
- Published
- 2018