Neratinib Efficacy in Patients With EGFR Exon 18-Mutant Non-Small-Cell Lung Cancer: Findings From the SUMMIT Basket Trial

Jonathan W. Goldman*, Alejandro Martinez Bueno, Christophe Dooms, Komal Jhaveri, Maria de Miguel, Sarina A. Piha-Paul, Nisha Unni, Aviad Zick, Amit Mahipal, J. Marie Suga, Charles Naltet, Monica Antoñanzas, John Crown, Judith Bebchuk, Lisa D. Eli, Beth H. Lowenthal, Devalingam Mahalingam

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Activating mutations in the epidermal growth factor receptor (EGFR) gene occur in 7% to 23% of patients with non-small-cell lung cancer (NSCLC). A small proportion of these (3–5%) are exon 18 mutations. Neratinib, an irreversible pan-HER tyrosine kinase inhibitor (TKI), had activity in the phase II SUMMIT basket study. We report efficacy and safety of neratinib in patients with EGFR exon 18-mutant NSCLC in SUMMIT, according to prior EGFR TKI treatment. Patients and Methods: Eligible patients had ECOG performance status 0–2. Prior EGFR TKIs, chemotherapy, and checkpoint inhibitors were allowed. Patients received neratinib (240 mg orally daily) and mandatory diarrhea prophylaxis with loperamide. The primary endpoint was objective response rate (ORR) at 8 weeks (ORR8); other endpoints included ORR, progression-free survival (PFS), duration of response, and safety. Results: Thirty-one patients were included (24/7 with/without prior TKI). ORR8 was 19.4% (95% CI 7.5–37.5); ORR was 32.3% (95% CI: 16.7–51.4); median PFS 5.75 months (95% CI: 2.27–9.23). Two of 7 patients with baseline central nervous system metastasis had partial responses (median PFS 3.6 months; 95% CI: 1.9–9.1). Six patients with G719A/X/C mutations had partial responses >10 months. Diarrhea was generally controlled (10% grade 3, no grade 4; one patient discontinued treatment because of diarrhea). Conclusion: Neratinib had meaningful activity in selected patients with EGFR exon 18-mutant NSCLC, including patients pretreated with ≥1 TKI. Diarrhea was generally low grade. Given the lack of effective treatments after EGFR TKI failure for NSCLC with uncommon mutations, further examination of neratinib is warranted.

Original languageEnglish (US)
JournalClinical Lung Cancer
DOIs
StateAccepted/In press - 2025

Funding

The authors would like to thank Bethann Hromatka (Puma Biotechnology) for publications support, Jane Liang and Daniel DiPrimeo (Puma Biotechnology) for programming support, and Deirdre Carman, Lee Miller, and Fiona Weston (Miller Medical Communications Ltd) for writing/editorial support, which was funded by Puma Biotechnology. SUMMIT was funded by Puma Biotechnology Inc. Puma Biotechnology Inc. also funded the provision of writing/editorial support provided by Deirdre Carman, Lee Miller, and Fiona Weston of Miller Medical Communications Ltd. Dr Piha-Paul received core grant P30CA016672 (CCSG Shared Resources) from the NIH/NCI to her institution.

Keywords

  • Basket study
  • NSCLC
  • Objective response rate
  • Rare mutations
  • Tyrosine kinase inhibitor

ASJC Scopus subject areas

  • Oncology
  • Pulmonary and Respiratory Medicine
  • Cancer Research

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