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Updated: Oct 22, 2025

Using Confocal Analysis of Xenopus laevis to Investigate Modulators of Wnt and Shh Morphogen Gradients
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Employing Genetically Encoded, Biophysical Sensors to Understand WNT/Frizzled Interaction and Receptor Complex

Pawel Kozielewicz1, Hannes Schihada1, Gunnar Schulte2

  • 1Section for Receptor Biology and Signaling, Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.

Handbook of Experimental Pharmacology
|August 31, 2021
PubMed

Insights

Frizzled (FZD) receptors are key in development and disease, particularly cancer. Advanced biosensors now offer deeper insights into WNT/FZD signaling, paving the way for new drug discovery strategies.

Area of Science:

  • Molecular Biology
  • Cell Signaling
  • Pharmacology

Background:

  • The Frizzled (FZD) receptor family, comprising ten mammalian paralogues, are G protein-coupled receptors crucial for embryonic development.
  • Aberrant FZD signaling is implicated in various diseases, notably cancer, making these receptors significant drug targets.

Purpose of the Study:

  • To review recent advancements in understanding FZD receptor activation.
  • To highlight the role of novel biosensor technologies in dissecting WNT/FZD signal transduction pathways.

Main Methods:

  • Utilizing genetically encoded biosensors to monitor FZD receptor activity.
  • Analyzing ligand-receptor interactions and conformational dynamics.
  • Investigating protein-protein interactions within the WNT/FZD pathway.

Main Results:

  • Recent progress in biosensor development has enhanced the ability to study FZD receptor activation at a molecular level.
  • These tools provide a clearer pharmacological understanding of WNT/FZD signal transduction.
  • Novel avenues for mechanism-based drug discovery and screening have been identified.

Conclusions:

  • Advanced biosensors are instrumental in the molecular dissection of FZD activation.
  • This improved understanding facilitates the development of targeted therapies for FZD-related diseases, especially cancer.
Keywords:
BRETConformationDrug discoveryFRETFrizzledG proteinGPCRLigand bindingReceptor activationScreeningWNTcpGFP

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