Genomic landscape of acquired resistance to third-generation EGFR tyrosine kinase inhibitors in EGFR T790M-mutant non-small cell lung cancer.

Cancer
Jiyun LeeSe-Hoon Lee

Abstract

EGFR tyrosine kinase inhibitors (TKIs) have shifted the treatment paradigm in advanced EGFR-mutant non-small cell lung cancer (NSCLC). However, patients who are treated with TKIs inevitably develop acquired resistance by mechanisms that are not fully understood. The purpose of this study was to investigate the mechanism of acquired resistance after treatment with third-generation EGFR TKIs. Advanced EGFR-mutant NSCLC patients treated with olmutinib or osimertinib who underwent a rebiopsy before treatment or after progression were analyzed retrospectively. Targeted sequencing was performed on 113 specimens (77 pretreatment and 36 posttreatment, including 15 paired samples) obtained via tissue biopsy. A total of 98 patients were included, 53 (54%) of whom were treated with osimertinib and 45 (46%) of whom were treated with olmutinib. Of the 36 patients with posttreatment biopsies, EGFR-dependent mechanisms, including C797S and L718Q mutations, were observed in 10 (28%) patients: 29% (5/17) in the osimertinib group and 26% (5/19) in the olmutinib group. EGFR-independent mechanisms were detected in 21 patients (21/36, 58%): 65% (11/17) in the osimertinib group and 53% (10/19) in the olmutinib group. The disappearance of EGFR T790M ...Continue Reading

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Oct 17, 2020·Oncogene·Hannah L TumbrinkMartin L Sos
May 25, 2021·Frontiers in Oncology·Maria Gabriela O FernandesVenceslau Hespanhol
Sep 1, 2021·European Journal of Medicinal Chemistry·Francesca FerlenghiMarco Mor

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