Ficlatuzumab and Cetuximab in Recurrent/Metastatic Head and Neck Squamous Cell Carcinoma (HNSCC)

Summary

The epidermal growth factor receptor (EGFR) is both oncogene and prognostic biomarker in head and neck squamous cell carcinoma (HNSCC). EGFR's functional importance in HNSCC resulted in development of the first molecularly targeted strategy, the anti-EGFR monoclonal antibody cetuximab. Given the lack of therapeutic options for patients with recurrent/metastatic HNSCC after failure of cetuximab, there is strong scientific interest in understanding resistance in order to identify new therapies for this population. A possible resistance mechanism to anti-EGFR therapy in HNSCC is primary or compensatory activation of alternate growth factor receptors including c-Met. The MET oncogene encodes c-Met, an RTK bound exclusively by the ligand, hepatocyte growth factor (HGF). The HGF/c-Met signaling pathway converges with the EGFR network at both the PI3K/Akt and MAPK nodes. Laboratory data suggest the ability for reciprocal compensation between EGFR and c-Met. We hypothesize that HGF/c-Met pathway inhibition may overcome resistance to cetuximab in patients with HNSCC, such as those with clinical cetuximab resistance. Ficlatuzumab (AV-299) is a humanized HGF-inhibitory immunoglobulin G1 (IgG1) monoclonal antibody. The primary objective of this phase 1b study is to find the recommended phase II dose (RP2D) of the combination of ficlatuzumab and cetuximab in patients with recurrent/metastaticHNSCC. The dose-finding study design will follow a Narayana k-in-a-row design with k set to 2 to target a 33% rate of dose-limiting toxicity (DLT). In the dose-finding phase, a total of 8 patients will be treated if no DLTs are observed or 14 patients if at least one DLT occurs. An expansion cohort will then proceed at RP2D until 12 patients have been treated at that dose level with the combination of ficlatuzumab and cetuximab. We will evaluate biomarkers of HGF/cMet pathway activation in baseline tissue, plasma and immune cells for a preliminary relationship with clinical activity.

Timeline

Start

2015-08

Primary completion

2016-06

Completion

2018-02

Drugs

Indications