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Supplementary Figure S1 from Randomized Trial of Tepotinib Plus Gefitinib Versus Chemotherapy in EGFR-Mutant NSCLC with EGFR Inhibitor Resistance Due to MET Amplification: INSIGHT Final Analysis

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posted on 2023-04-20, 13:00 authored by Chong Kin Liam, Azura Rozila Ahmad, Te-Chun Hsia, Jianying Zhou, Dong-Wan Kim, Ross Andrew Soo, Ying Cheng, Shun Lu, Sang Won Shin, James Chih-Hsin Yang, Yiping Zhang, Jun Zhao, Karin Berghoff, Rolf Bruns, Andreas Johne, Yi-Long Wu

Outcomes of treatment for all individuals enrolled



The final analyses of the INSIGHT phase II study evaluating tepotinib (a selective MET inhibitor) plus gefitinib versus chemotherapy in patients with MET-altered EGFR-mutant NSCLC (data cut-off: September 3, 2021). Adults with advanced/metastatic EGFR-mutant NSCLC, acquired resistance to first-/second-generation EGFR inhibitors, and MET gene copy number (GCN) ≥5, MET:CEP7 ≥2, or MET IHC 2+/3+ were randomized to tepotinib 500 mg (450 mg active moiety) plus gefitinib 250 mg once daily, or chemotherapy. Primary endpoint was investigator-assessed progression-free survival (PFS). MET-amplified subgroup analysis was preplanned. Overall (N = 55), median PFS was 4.9 months versus 4.4 months [stratified HR, 0.67; 90% CI, 0.35–1.28] with tepotinib plus gefitinib versus chemotherapy. In 19 patients with MET amplification (median age 60.4 years; 68.4% never-smokers; median GCN 8.8; median MET/CEP7 2.8; 89.5% with MET IHC 3+), tepotinib plus gefitinib improved PFS (HR, 0.13; 90% CI, 0.04–0.43) and overall survival (OS; HR, 0.10; 90% CI, 0.02–0.36) versus chemotherapy. Objective response rate was 66.7% with tepotinib plus gefitinib versus 42.9% with chemotherapy; median duration of response was 19.9 months versus 2.8 months. Median duration of tepotinib plus gefitinib was 11.3 months (range, 1.1–56.5), with treatment >1 year in six (50.0%) and >4 years in three patients (25.0%). Seven patients (58.3%) had treatment-related grade ≥3 adverse events with tepotinib plus gefitinib and five (71.4%) had chemotherapy. Final analysis of INSIGHT suggests improved PFS and OS with tepotinib plus gefitinib versus chemotherapy in a subgroup of patients with MET-amplified EGFR-mutant NSCLC, after progression on EGFR inhibitors.

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