Phase 1b Trial of Ficlatuzumab, a Humanized Hepatocyte Growth Factor Inhibitory Monoclonal Antibody, in Combination With Gefitinib in Asian Patients With NSCLC

Eng-Huat Tan, Wan-Teck Lim, Myung-Ju Ahn, Quan-Sing Ng, Jin Seok Ahn, Daniel Shao-Weng Tan, Jong-Mu Sun, May Han, Francis C Payumo, Krista McKee, Wei Yin, Marc Credi, Shefali Agarwal, Jaroslaw Jac, Keunchil Park, Eng-Huat Tan, Wan-Teck Lim, Myung-Ju Ahn, Quan-Sing Ng, Jin Seok Ahn, Daniel Shao-Weng Tan, Jong-Mu Sun, May Han, Francis C Payumo, Krista McKee, Wei Yin, Marc Credi, Shefali Agarwal, Jaroslaw Jac, Keunchil Park

Abstract

Hepatocyte growth factor (HGF)/c-Met pathway dysregulation is a mechanism for epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs). Ficlatuzumab (AV-299; SCH 900105), a humanized IgG1 κ HGF inhibitory monoclonal antibody, prevents HGF/c-Met pathway ligand-mediated activation. This phase 1b study assessed the safety/tolerability, pharmacokinetics/pharmacodynamics, and antitumor activity of ficlatuzumab plus gefitinib in Asian patients with previously treated advanced non-small cell lung cancer (NSCLC). Patients received intravenous ficlatuzumab either 10 mg/kg (cohort 1; n = 3) or 20 mg/kg (cohort 2; n = 12) every 2 weeks plus oral gefitinib 250 mg daily. Patients tolerated the drug combination well. Four treatment-related grade 3/4 adverse events were reported in 3 patients (cohort 2). Pharmacokinetic profiles for ficlatuzumab and gefitinib were consistent with prior single-agent trials. Partial responses were achieved in 5 patients (4 confirmed), all in cohort 2; objective response rate (ORR) was 33% (duration, 1.9-6.4 months). Responding patients had no prior EGFR TKI treatment, 2 without an EGFR mutation. Four additional patients had disease stabilization (cohort 2; duration, 2.7-9.1 months; 42% ORR). The recommended phase 2 dose for ficlatuzumab plus gefitinib 250 mg/day was 20 mg/kg every 2 weeks. This drug combination has shown preliminary dose-related antitumor activity in advanced NSCLC.

Trial registration: ClinicalTrials.gov NCT01039948.

Keywords: NSCLC; ficlatuzumab; gefitinib; lung adenocarcinoma; non-small cell lung cancer.

© 2018, The Authors. Clinical Pharmacology in Drug Development published by Wiley Periodicals, Inc. on behalf of The American College of Clinical Pharmacology.

Figures

Figure 1
Figure 1
Mean ficlatuzumab concentrations (μg/mL) versus time by 10 and 20 mg/kg doses. Error bars reflect standard deviation. Solid vertical lines reflect separate treatment cycles, and dashed vertical lines reflect nominal ficlatuzumab dosing times.
Figure 2
Figure 2
Serum HGF levels (ng/mL) after ficlatuzumab and gefitinib treatment by patient number.

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Source: PubMed

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