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Establishing Dual Resistance to EGFR-TKI and MET-TKI in Lung Adenocarcinoma Cells In Vitro with a 2-step Dose-escalation Procedure
Published on: August 11, 2017
Epidermal Growth Factor Receptor (EGFR)-Mutated Non-Small-Cell Lung Cancer (NSCLC)
Connor O'Leary1,2,3, Harry Gasper1, Katherine B Sahin2,3
1Princess Alexandra Hospital, Brisbane 4000, Australia.
Abstract:
Epidermal growth factor receptor (EGFR) mutations are the most common oncogenic drivers in non-small-cell lung cancer (NSCLC). Significant developments have taken place which highlight the differences in tumor biology that exist between the mutant and wild-type subtypes of NSCLC. Patients with advanced EGFR-mutant NSCLC have a variety of EGFR-targeting agents available proven to treat their disease. This has led to superior patient outcomes when used as a monotherapy over traditional cytotoxic systemic therapy. Attempts at combining EGFR agents with other anticancer systemic treatment options, such as chemotherapy, antiangiogenic agents, and immunotherapy, have shown varied outcomes. Currently, no specific combination stands out to cause a shift away from the use of single-agent EGFR inhibitors in the first-line setting. Similarly, adjuvant EGFR inhibitors, are yet to significantly add to patient overall survival if used at earlier timepoints in the disease course. Liquid biopsy is an evolving technology with potential promise of being incorporated into the management paradigm of this disease. Data are emerging to suggest that this technique may be capable of identifying early resistance mechanisms and consequential disease progression on the basis of the analysis of blood-based circulating tumor cells.
Insights
Epidermal growth factor receptor (EGFR) mutations drive non-small-cell lung cancer (NSCLC). While EGFR inhibitors improve outcomes, combinations and adjuvant therapies show limited benefit, and liquid biopsy shows promise for monitoring resistance.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Epidermal growth factor receptor (EGFR) mutations are key drivers in non-small-cell lung cancer (NSCLC).
- Distinct tumor biology exists between EGFR-mutant and wild-type NSCLC subtypes.
- Targeted EGFR therapies offer superior outcomes in advanced NSCLC compared to traditional chemotherapy.
Purpose of the Study:
- To review current advancements in EGFR-mutant NSCLC treatment.
- To evaluate the efficacy of combination therapies and adjuvant EGFR inhibitors.
- To explore the emerging role of liquid biopsy in managing NSCLC.
Main Methods:
- Review of clinical trial data and scientific literature on EGFR-mutant NSCLC.
- Analysis of outcomes for monotherapy, combination therapies, and adjuvant EGFR inhibitors.
- Assessment of the potential of liquid biopsy for early detection of resistance and progression.
Main Results:
- EGFR inhibitors as monotherapy improve outcomes in advanced NSCLC.
- Combination therapies with EGFR inhibitors have yielded varied results, with no clear first-line standard.
- Adjuvant EGFR inhibitors have not yet demonstrated significant improvements in overall survival.
- Liquid biopsy shows potential for identifying early resistance mechanisms and disease progression.
Conclusions:
- Single-agent EGFR inhibitors remain a cornerstone for first-line treatment in advanced EGFR-mutant NSCLC.
- Further research is needed to optimize combination strategies and adjuvant settings.
- Liquid biopsy represents a promising tool for personalized NSCLC management and monitoring treatment response.
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