Non-small cell lung cancer cells with uncommon EGFR exon 19delins variants respond poorly to third-generation EGFR inhibitors

Autor: Zhiqin Lu, Yali Yi, Linxiao Wang, Yuxi Luo, Daya Luo, Le Xiong, Yun Shu, Hui Luo, Jing Li, Wufu Zhu, Zhimin Zeng, Anwen Liu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Translational Oncology, Vol 39, Iss , Pp 101834- (2024)
Druh dokumentu: article
ISSN: 1936-5233
DOI: 10.1016/j.tranon.2023.101834
Popis: Background: This study compared the clinical efficacy of first-, second-, and third-generation tyrosine kinase inhibitors (TKIs) in previously untreated non-small cell lung cancer (NSCLC) patients harboring uncommon epidermal growth factor receptor (EGFR) exon 19delins variants. Methods: We retrospectively analyzed the clinical outcomes of NSCLC patients with EGFR exon 19delins mutations who were treated with third- and first-generation EGFR TKIs. In vitro and in vivo studies were conducted to verify the sensitivity of these mutations to distinct generations of TKIs. Molecular simulation was used to investigate the structural characteristics of the EGFR mutant molecules. Results: In a multicenter cohort of 1,526 patients, 37 (2.4 %) had uncommon EGFR 19delins mutations. Twenty-four patients were treated with first-generation EGFR TKIs, and third-generation TKIs were administered to ten patients as frontline therapy. Patients carrying EGFR exon 19delins mutations who were given third-generation TKIs exhibited comparatively shorter progression-free survival (PFS) and overall survival (OS) in relation to those who received first-generation EGFR inhibitors; median PFS: 6.9 months vs. 19.1 months (p
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