Observational studyTargeted oncology2023
Clinical Efficacy and Safety of First- or Second-Generation EGFR-TKIs after Osimertinib Resistance for EGFR Mutated Lung Cancer: A Prospective Exploratory Study.
Observational study in Targeted oncology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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The trial behind it
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Who cites it
10 citing papers in PubMed, 8 citations in OpenAlex.
- Dacomitinib for EGFR-L858R-mutated non-small cell lung cancer following acquired resistance to third-generation EGFR-TKIs: a retrospective real-world study.Translational lung cancer research · 2026Article
- Dacomitinib as a First-Line Therapy for Advanced EGFR-Mutated Non-Small Cell Lung Cancer Without Brain Metastases: A Multicenter Retrospective Observational Study.Cancer medicine · 2026Observational
- Clinical characteristics and outcomes of advanced EGFR-mutated NSCLC treated with 45 or 30 mg starting doses of dacomitinib: a retrospective multicenter analysis.Therapeutic advances in medical oncology · 2026Article
- Utility of serum CYFRA 21-1 as a prognostic biomarker in ALK-positive non-small cell lung cancer treated with ALK-TKIs: a retrospective cohort study.Translational lung cancer research · 2025Article
- Clinical outcome analysis of different first‑ and second‑generation EGFR‑tyrosine kinase inhibitors in untreated patients with EGFR‑mutated non‑small cell lung cancer with baseline brain metastasis.Oncology letters · 2025Article
- Prognostic factors influencing overall survival in stage IV EGFR-mutant NSCLC patients treated with EGFR-TKIs.BMC pulmonary medicine · 2025Article
- Real-World Study of EGFR-TKI Rechallenge With Another TKI After First-Line Osimertinib Discontinuation in Patients With EGFR-Mutated Non-Small Cell Lung Cancer: A Subset Analysis of the Reiwa Study.Thoracic cancer · 2025Observational
- Detection of Circulating Tumor Cells and EGFR Mutation in Pulmonary Vein and Arterial Blood of Lung Cancer Patients Using a Newly Developed Immunocytology-Based Platform.Diagnostics (Basel, Switzerland) · 2024Article
- Mechanism of targeting the mTOR pathway to regulate ferroptosis in NSCLC with different EGFR mutations.Oncology letters · 2024Article
- Overcoming acquired resistance following osimertinib administration in EGFR-mutant lung adenocarcinoma.Translational lung cancer research · 2024Article
Corrections and comments
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Authors and funding
14 authors at 7 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundOsimertinib monotherapy is a common treatment for epidermal growth factor receptor (EGFR)-mutant non-small cell lung cancer (NSCLC); however, standard treatment strategies for acquired resistance to this drug have not been established. In addition, the clinical significance of first-generation (1G) or second-generation (2G) EGFR-tyrosine kinase inhibitors (TKI) in patients with EGFR-mutant NSCLC and osimertinib resistance has not yet been fully evaluated.
objectiveWe aimed to conduct a prospective multicenter observational study to evaluate the efficacy and safety of 1G and 2G EGFR-TKIs after the development of osimertinib resistance.
methodsPatients with EGFR-mutant NSCLC who received 1G or 2G EGFR-TKIs after developing resistance to osimertinib monotherapy were prospectively assessed at eight institutions in Japan. The primary endpoint was progression-free survival (PFS).
resultsA total of 29 patients with advanced or recurrent EGFR-mutant NSCLC were analyzed. The objective response and disease control rates were 6.9% (2/29) and 58.6% (17/29), respectively. The median PFS was 1.9 months [95% confidence interval (CI): 1.3-5.3]. There was no significant difference in PFS between the 1G and 2G EGFR-TKI groups (3.7 versus 1.5 months, log-rank test p = 0.20). However, patients with normal cytokeratin 19 fragment (CYFRA 21-1) and pro-gastrin-releasing peptide (ProGRP) levels experienced longer PFS than those with elevated CYFRA 21-1 and/or ProGRP (5.5 versus 1.3 months, log-rank test p < 0.001).
conclusionAdministration of 1G or 2G EGFR-TKIs after the development of osimertinib resistance has limited efficacy in patients with EGFR-mutant NSCLC. Moreover, normal CYFRA 21-1 and ProGRP levels could be promising indicators for 1G and 2G EGFR-TKI administration after osimertinib resistance development. TRIAL REGISTRATION NUMBER: UMIN000044049.
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