Related Experiment Video
Updated: Jul 17, 2026

A Method for Screening and Validation of Resistant Mutations Against Kinase Inhibitors
Published on: December 7, 2014
[Novel inhibitors of Bcr-Abl]
Justyna Jakubowska1, Małgorzata Czyz
1Zakład Biologii Molekularnej Nowotworów Uniwersytetu Medycznego w Łodzi.
Abstract:
STI571 (imatinib; Gleevec) was developed to specifically target the tyrosine kinase activity of the Bcr-Abl protein in Philadelphia chromosome-positive chronic myeloid leukemia (CML). It also inhibits the activity of c-Kit and PDGFR. It is the first-line drug for newly diagnosed CML, with remarkable efficacy to patients in the chronic phase of this cancer. However, CML patients in the accelerated phase or blast crisis often relapse due to drug resistance. STI571 fails to eradicate leukemic stem cells, and BCR-ABL(+). cells remain detectable in the majority of patients. The necessity for alternative or additional treatment for STI571-resistant leukemia resulted in the development of a second generation of drugs for targeted therapies. In this review a literature overview of the alternative inhibitors which were designed to override STI571 resistance and decrease the aberrant kinase activity of Bcr-Abl protein with higher efficiency is presented.
Insights
Second-generation tyrosine kinase inhibitors offer new hope for chronic myeloid leukemia (CML) patients resistant to imatinib (STI571). This review explores alternative drugs designed to overcome resistance and target Bcr-Abl protein more effectively.
Area of Science:
- Oncology
- Pharmacology
- Molecular Biology
Background:
- Imatinib (STI571) is a targeted therapy for Philadelphia chromosome-positive chronic myeloid leukemia (CML).
- While effective in the chronic phase, imatinib resistance often develops in accelerated or blast crisis phases.
- Leukemic stem cells and BCR-ABL positive cells persist despite imatinib treatment.
Purpose of the Study:
- To review alternative tyrosine kinase inhibitors developed to overcome imatinib resistance in CML.
- To present an overview of newer drugs designed for higher efficiency against Bcr-Abl protein.
Main Methods:
- Literature review of alternative targeted therapies for CML.
- Analysis of inhibitors designed to bypass imatinib resistance mechanisms.
Main Results:
- Development of second-generation tyrosine kinase inhibitors.
- These inhibitors aim to more effectively target Bcr-Abl kinase activity.
Conclusions:
- Alternative inhibitors are crucial for managing imatinib-resistant CML.
- Newer targeted therapies offer improved efficacy for advanced CML phases.
Related Concept Videos
Targeted Cancer Therapies
There are several types of targeted therapies against specific...
Inhibition of Cdk Activity
Inhibition of CDK Activity
Combination Therapies and Personalized Medicine
The combination of the drug acetazolamide and sulforaphane is a good example of combination therapy to treat cancer. The cells in the interior of a large tumor often die due to the hypoxic and...
The Intrinsic Apoptotic Pathway
Inhibitors of Viral Protein Synthesis
