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Updated: Mar 8, 2026

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
STAT3 signaling mediates tumour resistance to EGFR targeted therapeutics
Ahmad A Zulkifli1, Fiona H Tan1, Tracy L Putoczki2
1Department of Surgery, The University of Melbourne, The Royal Melbourne Hospital, Parkville, Victoria 3050, Australia.
Abstract:
Several EGFR inhibitors are currently undergoing clinical assessment or are approved for the clinical management of patients with varying tumour types. However, treatment often results in a lack of response in many patients. The majority of patients that initially respond eventually present with tumours that display acquired resistance to the original therapy. A large number of receptor tyrosine and intracellular kinases have been implicated in driving signaling that mediates this tumour resistance to anti-EGFR targeted therapy, and in a few cases these discoveries have led to overall changes in prospective tumour screening and clinical practice (K-RAS in mCRC and EGFR T790M in NSCLC). In this mini-review, we specifically focus on the role of the STAT3 signaling axis in providing both intrinsic and acquired resistance to inhibitors of the EGFR. We also focus on STAT3 pathway targeting in an attempt to overcome resistance to anti-EGFR therapeutics.
Insights
This review explores how STAT3 signaling causes resistance to EGFR inhibitors in cancer. Targeting STAT3 may help overcome this resistance, improving patient outcomes.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Epidermal Growth Factor Receptor (EGFR) inhibitors are crucial in cancer therapy.
- Many patients show primary resistance or develop acquired resistance to EGFR inhibitors.
- Tumor resistance mechanisms necessitate the exploration of alternative therapeutic strategies.
Purpose of the Study:
- To review the role of the STAT3 signaling axis in intrinsic and acquired resistance to EGFR inhibitors.
- To discuss STAT3 pathway targeting as a strategy to overcome resistance to anti-EGFR therapies.
Main Methods:
- Literature review focusing on STAT3 signaling in EGFR inhibitor resistance.
- Analysis of existing research on kinase involvement in tumor resistance.
- Examination of clinical implications and therapeutic strategies.
Main Results:
- STAT3 signaling is implicated in both initial (intrinsic) and developed (acquired) resistance to EGFR inhibitors.
- Dysregulation of STAT3 contributes to therapeutic failure in various cancer types.
- Identifying STAT3 as a key mediator provides a potential therapeutic target.
Conclusions:
- The STAT3 pathway is a significant factor in EGFR inhibitor resistance.
- Targeting STAT3 offers a promising approach to overcome resistance and improve efficacy of EGFR-targeted therapies.
- Further research into STAT3 inhibition is warranted for clinical application.
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