Related Experiment Video

Updated: Feb 1, 2026

Comet Assay to Quantify DNA Damage in FLT3 Mutant-expressing 32D Cells after Exposure to Type I and Type II FLT3 Inhibitors
04:36

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

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Discovery of a highly selective FLT3 inhibitor with specific proliferation inhibition against AML cells harboring

Hao Heng1, Yanle Zhi2, Haoliang Yuan3

  • 1School of Science, China Pharmaceutical University, 639 Longmian Avenue, Nanjing, 211198, PR China.

European Journal of Medicinal Chemistry
|December 4, 2018
PubMed

Insights

A novel FLT3 inhibitor, compound 1, shows potent activity against FLT3 mutants in acute myeloid leukemia (AML). This selective inhibitor offers potential to overcome drug resistance and improve AML therapy.

Area of Science:

  • Medicinal Chemistry
  • Molecular Biology
  • Pharmacology

Background:

  • FMS-like tyrosine kinase 3 (FLT3) is frequently over-expressed in acute myeloid leukemia (AML), with mutations like FLT3-ITD correlating with poor prognosis.
  • Existing FLT3 inhibitors face challenges with kinase selectivity and drug resistance, particularly with concurrent FLT3-ITD-TKD mutations.

Purpose of the Study:

  • To discover and characterize a novel FLT3 inhibitor with improved selectivity and potential to overcome drug resistance in AML.
  • To investigate the anti-leukemic effects and mechanism of action of the novel inhibitor.

Main Methods:

  • Virtual screening of an in-house compound library to identify potential FLT3 inhibitors.
  • In vitro assays to evaluate inhibitory activity against FLT3 mutants and selectivity over other kinases.
  • Cell-based assays to assess anti-proliferative effects, cytotoxicity, cell cycle arrest, and apoptosis induction.
  • Molecular dynamics simulations to study the binding mode of the inhibitor.

Main Results:

  • Compound 1, a structurally simple molecule, demonstrated potent inhibition against multiple FLT3 mutants with high selectivity.
  • Anti-tumor effects in vitro were dependent on FLT3-ITD expression, with minimal cytotoxicity to normal cells.
  • Compound 1 effectively blocked the FLT3 pathway, induced cell cycle arrest, and promoted apoptosis in MV4-11 cells.

Conclusions:

  • Compound 1 represents a promising starting point for developing next-generation FLT3 inhibitors with enhanced kinase selectivity.
  • The findings suggest potential for compound 1 to overcome drug resistance mechanisms in FLT3-mutated AML.
  • Further structural optimization based on binding mode analysis could lead to more effective AML therapeutics.
Keywords:
AMLFLT3 inhibitorPyrazoleSelectivity

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