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Published on: August 11, 2017
Re-Treatment with EGFR-TKIs in NSCLC Patients Who Developed Acquired Resistance
1Department of Chest Medicine, Taipei Veteran General Hospital, Yang-Min National University, No. 21, Sec. 2, Shi-Pai Rd., Taipei 11217, Taiwan. marco1215@gmail.com.
Abstract:
In the era of personalized medicine, epidermal growth factor receptor (EGFR) inhibition with tyrosine kinase inhibitor (TKI) has been a mainstay of treatment for non-small cell lung cancer (NSCLC) patients with an EGFR mutation. Acquired resistance, especially substitution of methionine for threonine at position 790 (T790M), which has accounted for more than half of the cases, developed inevitably in patients who were previously treated with EGFR-TKI. At present, there is no standard treatment for patients who have developed a resistance to EGFR-TKI. Several strategies have been developed or suggested to treat such patients. This article aimsto review the EGFR-TKI re-treatment strategy and the efficacy of different generations of EGFR-TKIs in patients with acquired resistance to prior EGFR-TKI.
Insights
Acquired resistance to epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) is common in non-small cell lung cancer (NSCLC). This review examines EGFR-TKI re-treatment strategies and the efficacy of different EGFR-TKI generations for resistant NSCLC.
Area of Science:
- Oncology
- Pharmacology
Background:
- Epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) are standard treatment for EGFR-mutated non-small cell lung cancer (NSCLC).
- Acquired resistance, particularly the T790M mutation, frequently develops after EGFR-TKI treatment in NSCLC patients.
- No established standard treatment exists for patients with acquired resistance to EGFR-TKIs.
Purpose of the Study:
- To review current EGFR-TKI re-treatment strategies for NSCLC.
- To evaluate the efficacy of various EGFR-TKI generations in patients with acquired resistance.
Main Methods:
- Literature review of studies on EGFR-TKI re-treatment in NSCLC.
- Analysis of clinical trial data and case reports regarding EGFR-TKI efficacy in resistant NSCLC.
Main Results:
- The T790M mutation is the most common cause of acquired resistance to EGFR-TKIs in NSCLC.
- Different generations of EGFR-TKIs show varying efficacy in overcoming acquired resistance.
- Re-treatment strategies are being developed to manage resistant NSCLC.
Conclusions:
- Effective strategies are needed to manage acquired resistance to EGFR-TKIs in NSCLC.
- Further research into novel re-treatment approaches and next-generation EGFR-TKIs is crucial.
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