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Updated: Oct 17, 2025

A Method for Screening and Validation of Resistant Mutations Against Kinase Inhibitors
Published on: December 7, 2014
Resistance to Tyrosine Kinase Inhibitors in Chronic Myeloid Leukemia-From Molecular Mechanisms to Clinical Relevance
Raquel Alves1,2,3,4, Ana Cristina Gonçalves1,2,3,4, Sergio Rutella5
1Laboratory of Oncobiology and Hematology, University Clinic of Hematology, Faculty of Medicine (FMUC), University of Coimbra, 3000-548 Coimbra, Portugal.
Abstract:
Resistance to targeted therapies is a complex and multifactorial process that culminates in the selection of a cancer clone with the ability to evade treatment. Chronic myeloid leukemia (CML) was the first malignancy recognized to be associated with a genetic alteration, the t(9;22)(q34;q11). This translocation originates the BCR-ABL1 fusion gene, encoding the cytoplasmic chimeric BCR-ABL1 protein that displays an abnormally high tyrosine kinase activity. Although the vast majority of patients with CML respond to Imatinib, a tyrosine kinase inhibitor (TKI), resistance might occur either de novo or during treatment. In CML, the TKI resistance mechanisms are usually subdivided into BCR-ABL1-dependent and independent mechanisms. Furthermore, patients' compliance/adherence to therapy is critical to CML management. Techniques with enhanced sensitivity like NGS and dPCR, the use of artificial intelligence (AI) techniques, and the development of mathematical modeling and computational prediction methods could reveal the underlying mechanisms of drug resistance and facilitate the design of more effective treatment strategies for improving drug efficacy in CML patients. Here we review the molecular mechanisms and other factors involved in resistance to TKIs in CML and the new methodologies to access these mechanisms, and the therapeutic approaches to circumvent TKI resistance.
Insights
Resistance to tyrosine kinase inhibitors (TKIs) in chronic myeloid leukemia (CML) can occur through various mechanisms. New sensitive techniques and AI can help understand and overcome this drug resistance for better CML treatment.
Area of Science:
- Hematology
- Oncology
- Molecular Biology
Background:
- Chronic myeloid leukemia (CML) is characterized by the BCR-ABL1 fusion gene, leading to uncontrolled tyrosine kinase activity.
- While tyrosine kinase inhibitors (TKIs) like Imatinib are effective, resistance remains a significant clinical challenge.
- Mechanisms of TKI resistance in CML are diverse, including BCR-ABL1-dependent and independent pathways, alongside patient adherence issues.
Purpose of the Study:
- To review the molecular mechanisms underlying TKI resistance in CML.
- To explore novel methodologies for detecting and understanding these resistance mechanisms.
- To discuss therapeutic strategies for overcoming TKI resistance in CML patients.
Main Methods:
- Review of existing literature on CML pathogenesis and TKI resistance.
- Discussion of advanced techniques such as next-generation sequencing (NGS) and digital PCR (dPCR).
- Exploration of artificial intelligence (AI) and computational modeling for predicting resistance.
Main Results:
- Identified BCR-ABL1-dependent and independent mechanisms contributing to TKI resistance.
- Highlighted the critical role of patient adherence in treatment efficacy.
- Emphasized the potential of sensitive molecular techniques and AI in elucidating resistance pathways.
Conclusions:
- Understanding the multifaceted mechanisms of TKI resistance is crucial for effective CML management.
- Advanced technologies like NGS, dPCR, and AI offer promising avenues for identifying resistance drivers.
- Developing novel therapeutic strategies targeting resistance mechanisms is essential to improve long-term outcomes for CML patients.
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