Discovery of a Pyrimidinedione Derivative as a Potent and Orally Bioavailable Axl Inhibitor

J Med Chem. 2021 Apr 8;64(7):3956-3975. doi: 10.1021/acs.jmedchem.0c02093. Epub 2021 Mar 18.

Abstract

The receptor tyrosine kinase Axl plays important roles in promoting cancer progression, metastasis, and drug resistance and has been identified as a promising target for anticancer therapeutics. We used molecular modeling-assisted structural optimization starting with the low micromolar potency compound 9 to discover compound 13c, a highly potent and orally bioavailable Axl inhibitor. Selectivity profiling showed that 13c could inhibit the well-known oncogenic kinase Met with equal potency to its inhibition of Axl superfamily kinases. Compound 13c significantly inhibited cellular Axl and Met signaling, suppressed Axl- and Met-driven cell proliferation, and restrained Gas6/Axl-mediated cancer cell migration or invasion. Furthermore, 13c exhibited significant antitumor efficacy in Axl-driven and Met-driven tumor xenograft models, causing tumor stasis or regression at well-tolerated doses. All these favorable data make 13c a promising therapeutic candidate for cancer treatment.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Amino Acid Sequence
  • Animals
  • Axl Receptor Tyrosine Kinase
  • Cell Line, Tumor
  • Cell Movement / drug effects
  • Cell Proliferation / drug effects
  • Humans
  • Male
  • Mice
  • Mice, Inbred ICR
  • Molecular Docking Simulation
  • Molecular Structure
  • Neoplasms / drug therapy*
  • Protein Binding
  • Protein Kinase Inhibitors / chemical synthesis
  • Protein Kinase Inhibitors / metabolism
  • Protein Kinase Inhibitors / therapeutic use*
  • Proto-Oncogene Proteins / antagonists & inhibitors*
  • Proto-Oncogene Proteins / metabolism
  • Pyrimidinones / chemical synthesis
  • Pyrimidinones / metabolism
  • Pyrimidinones / therapeutic use*
  • Rats
  • Rats, Sprague-Dawley
  • Receptor Protein-Tyrosine Kinases / antagonists & inhibitors*
  • Receptor Protein-Tyrosine Kinases / metabolism
  • Signal Transduction / drug effects
  • Structure-Activity Relationship
  • Xenograft Model Antitumor Assays

Substances

  • Protein Kinase Inhibitors
  • Proto-Oncogene Proteins
  • Pyrimidinones
  • Receptor Protein-Tyrosine Kinases
  • Axl Receptor Tyrosine Kinase