Cited by 89Lung Cancer Treatments and MutationsHER2/EGFR in Cancer ResearchCancer Genomics and Diagnostics

TAS6417, A Novel EGFR Inhibitor Targeting Exon 20 Insertion Mutations

Hasako, Shinichi, Terasaka, Miki, Abe, Naomi, Uno, Takao, Ohsawa, Hirokazu, Hashimoto, Akihiro, Fujita, Ryoto, Tanaka, Kenji +6 more·2018·Molecular Cancer Therapeutics

Published version of a preprint

Abstract

Activating mutations in the EGFR gene are important targets in cancer therapy because they are key drivers of non–small cell lung cancer (NSCLC). Although almost all common EGFR mutations, such as exon 19 deletions and the L858R point mutation in exon 21, are sensitive to EGFR-tyrosine kinase inhibitor (TKI) therapies, NSCLC driven by EGFR exon 20 insertion mutations is associated with poor clinical outcomes due to dose-limiting toxicity, demonstrating the need for a novel therapy. TAS6417 is a novel EGFR inhibitor that targets EGFR exon 20 insertion mutations while sparing wild-type (WT) EGFR. In cell viability assays using Ba/F3 cells engineered to express human EGFR, TAS6417 inhibited EGFR with various exon 20 insertion mutations more potently than it inhibited the WT. Western blot analysis revealed that TAS6417 inhibited EGFR phosphorylation and downstream molecules in NSCLC cell lines expressing EGFR exon 20 insertions, resulting in caspase activation. These characteristics led to marked tumor regression in vivo in both a genetically engineered model and in a patient-derived xenograft model. Furthermore, TAS6417 provided a survival benefit with good tolerability in a lung orthotopic implantation mouse model. These findings support the clinical evaluation of TAS6417 as an efficacious drug candidate for patients with NSCLC harboring EGFR exon 20 insertion mutations. Mol Cancer Ther; 17(8); 1648–58. ©2018 AACR.

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Crossref · 10.1158/1535-7163.mct-17-1206

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Authors
Hasako, S., Terasaka, M., Abe, N., Uno, T., Ohsawa, H., Hashimoto, A., Fujita, R., Tanaka, K., Okayama, T., Wadhwa, R., Miyadera, K., Aoyagi, Y., Yonekura, K., & Matsuo, K.
Affiliations
  • Taiho Pharmaceutical (Japan) (JP)
  • National Institute of Advanced Industrial Science and Technology (JP)
Venue
Molecular Cancer Therapeutics
Published
2018-07-31
Volume
17
Issue
8
Pages
1648-1658
ISSN
  • 1535-7163 (ISSN-L)
  • 1538-8514
OpenAlex
W2799325482
Cited by
88
References
36
Citations by year
2026: 6 · 2025: 8 · 2024: 10 · 2023: 13 · 2022: 9 · 2021: 12 · 2020: 18 · 2019: 10 · 2018: 2
FWCI
7.91
Type
journal article
Language
en
Open access
closed
Locations
  • Molecular Cancer Therapeutics (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
  • Health Sciences › Medicine › Oncology › HER2/EGFR in Cancer Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer Genomics and Diagnostics
Keywords
EGFR exon 20 insertion, EGFR tyrosine kinase inhibitors, non-small cell lung cancer, EGFR phosphorylation, caspase activation, patient-derived xenografts, genetically engineered mouse models, drug tolerability, targeted cancer therapy
MeSH terms
Animals, Disease Models, Animal, Exons, Female, Humans, Male, Mutation, Protein Kinase Inhibitors, Mice, Rats

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