Antitumor activity and safety of FPA144, an ADCC-enhanced, FGFR2b isoform-selective monoclonal antibody, in patients with FGFR2b+ gastric cancer and advanced solid tumors.
2016
2502Background: FGFR2b-overexpressing gastric cancer is a distinct setting with poor prognosis. FPA144, a humanized monoclonal IgG1 antibody directed against FGFR2b, has been engineered for enhanced ADCC and specific FGFR2 signaling blockade. FPA144-001 is a two-part first-in-human Phase 1 study of FPA144 monotherapy: Part 1 dose escalation in patients with advanced solid tumors (Part 1A) and advanced gastric cancer (Part 1B); and Part 2 expansion to evaluate the safety, PK and early efficacy in selected gastric cancer patients treated at the recommended dose (RD). Methods: Part 1A was a 3+3 design to assess safety and PK of FPA144 and to establish a RD. Patients with gastric cancer were enrolled in parallel Part 1B cohorts to provide gastric cancer PK. Part 2 eligibility requires a diagnosis of gastric cancer and tissue for FGFR2b expression analysis. Tumor testing is done centrally using a proprietary FGFR2b-selective IHC assay. Results: Part 1 of the study enrolled 27 patients – 19 in Part 1A and 8 in ...
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