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Updated: Jun 30, 2025

Profiling Sensitivity to Targeted Therapies in EGFR-Mutant NSCLC Patient-Derived Organoids
Published on: November 22, 2021
From osimertinib to preemptive combinations
1Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA.
Abstract:
Here, I suggest that while first-line osimertinib extends median progression-free survival (PFS) in EGFR-mutant lung cancer compared to first-generation TKIs, it reduces individual PFS in 15-20% of patients compared to first-generation TKIs. Since detecting a single resistant cell before treatment is usually impossible, osimertinib must be used in all patients as a first-line treatment, raising median PFS overall but harming some. The simplest remedy is a preemptive combination (PC) of osimertinib and gefitinib. A comprehensive PC (osimertinib, afatinib/gefitinib, and capmatinib) could dramatically increase PFS for 80% of patients compared to osimertinib alone, without harming anyone. This article also explores PCs for MET-driven lung cancer.
Insights
First-line osimertinib improves median progression-free survival (PFS) for EGFR-mutant lung cancer but can harm some patients. Preemptive combination therapy offers a potential solution to increase PFS for most patients without harm.
Area of Science:
- Oncology
- Pharmacology
- Genetics
Background:
- Epidermal growth factor receptor (EGFR) mutations drive lung cancer.
- Osimertinib is a first-line treatment for EGFR-mutant lung cancer, extending median progression-free survival (PFS).
- However, a subset of patients experiences reduced PFS with osimertinib compared to earlier treatments.
Purpose of the Study:
- To evaluate the potential harm of first-line osimertinib in a subset of EGFR-mutant lung cancer patients.
- To propose preemptive combination (PC) therapies to improve PFS and avoid harm.
- To explore PCs for MET-driven lung cancer.
Main Methods:
- Comparative analysis of PFS data for osimertinib versus first-generation TKIs.
- Conceptualization of preemptive combination therapies.
- Exploration of treatment strategies for MET-driven lung cancer.
Main Results:
- First-line osimertinib extends median PFS but reduces individual PFS in 15-20% of patients.
- A comprehensive PC of osimertinib, afatinib/gefitinib, and capmatinib could significantly increase PFS for 80% of patients.
- The proposed PCs aim to maximize PFS benefits without causing harm.
Conclusions:
- Osimertinib is essential for first-line treatment due to overall median PFS gains, despite potential individual harm.
- Preemptive combination therapy represents a promising strategy to enhance treatment efficacy and patient outcomes in EGFR-mutant and MET-driven lung cancer.
- Further research into comprehensive preemptive combinations is warranted.
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