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Design, Synthesis and Inhibitory Activity of Photoswitchable RET Kinase Inhibitors

Rubén Ferreira1, Jesper R Nilsson1, Carlos Solano2

  • 1Department of Chemistry and Chemical Engineering, Chalmers University of Technology, SE-412 96 Göteborg, Sweden.

Scientific Reports
|May 7, 2015
PubMed

Insights

Researchers developed novel photoswitchable kinase inhibitors for REarranged during Transfection (RET) signaling. These compounds offer light-controlled inhibition of RET activity, advancing tools for studying cancer and neural development.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Pharmacology

Background:

  • REarranged during Transfection (RET) is a receptor tyrosine kinase crucial for neuronal development.
  • Dysregulated RET signaling and kinase hyperactivity are linked to various cancers, particularly thyroid cancer.
  • Targeting RET with small-molecule inhibitors is a key therapeutic strategy.

Purpose of the Study:

  • To develop novel photoswitchable small-molecule inhibitors for external control of RET kinase activity.
  • To create tools for spatiotemporal control of RET signaling in biological systems.
  • To investigate the potential of photonic control in kinase inhibitor development.

Main Methods:

  • Synthesis of azo-functionalized pyrazolopyrimidines as photoswitchable RET kinase inhibitors.
  • Evaluation of compound switching properties, stability, and inhibitory effects in cell-free and live-cell assays.
  • Assessment of photoisomer-dependent differences in RET inhibitory activity.

Main Results:

  • Development of photoswitchable RET kinase inhibitors with excellent switching properties and stability.
  • Demonstration of effective RET inhibition in both cell-free and live-cell settings.
  • Significant differences in inhibitory activity observed between the compound's photoisomeric forms.

Conclusions:

  • The developed compounds represent the first photoswitchable small-molecule kinase inhibitors.
  • These inhibitors enable photonic control over RET kinase activity, offering spatiotemporal precision.
  • This work advances the development of novel tools for kinase signal transduction research and therapeutic strategies.

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