Small molecule FLT3 tyrosine kinase inhibitors
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Updated: Aug 24, 2026

Comet Assay to Quantify DNA Damage in FLT3 Mutant-expressing 32D Cells after Exposure to Type I and Type II FLT3 Inhibitors
Published on: October 17, 2025
1Johns Hopkins University School of Medicine, Department of Oncology, Baltimore, Maryland, USA.
Abstract:
Activating mutations of FLT3 (FMS-Like Tyrosine kinase-3) are the most common molecular abnormality in acute myeloid leukemia (AML). Their presence is associated with a worse prognosis, and the recognition of this has led to the development of several new small molecule FLT3 tyrosine kinase inhibitors. In this review, we summarize these developments and compare and contrast these novel agents both with regards to the assays used to characterize them as well as to their clinical potential.
Insights
Activating mutations in FMS-Like Tyrosine kinase-3 (FLT3) are common in acute myeloid leukemia (AML) and linked to poor outcomes. This review details novel FLT3 inhibitors developed to target these mutations and assesses their clinical utility.
Area of Science:
- Oncology
- Molecular Biology
- Pharmacology
Background:
- Activating mutations in FMS-Like Tyrosine kinase-3 (FLT3) represent the most frequent molecular alteration in acute myeloid leukemia (AML).
- FLT3 mutations are strongly correlated with a poorer prognosis in AML patients.
- This has driven the development of targeted therapies.
Purpose of the Study:
- To review the latest developments in small molecule FLT3 tyrosine kinase inhibitors.
- To compare and contrast these novel agents.
- To evaluate their clinical potential and the assays used for characterization.
Main Methods:
- Literature review of recent studies on FLT3 inhibitors in AML.
- Comparative analysis of different FLT3 inhibitors.
- Assessment of preclinical and clinical data.
Main Results:
- Several novel small molecule FLT3 inhibitors have been developed.
- These agents show varying degrees of efficacy and specificity.
- Characterization assays differ across studies.
Conclusions:
- FLT3 inhibitors represent a promising therapeutic strategy for AML with FLT3 mutations.
- Further research is needed to optimize treatment selection and overcome resistance.
- Understanding assay methodologies is crucial for comparing drug efficacy.
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