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Illuminating the complexity of GPCR pathway selectivity - advances in biosensor development.

Shane C Wright1, Michel Bouvier2

  • 1Institute for Research in Immunology and Cancer, Department of Biochemistry and Molecular Medicine, Université de Montréal, Montréal, QC, H3T 1J4, Canada; Department of Physiology and Pharmacology, Karolinska Institutet, S17177, Stockholm, Sweden.

Current Opinion in Structural Biology
|May 28, 2021
PubMed
Summary

G protein-coupled receptors (GPCRs) are key drug targets. Advanced biosensors reveal that biased signaling, where drugs activate specific pathways, is becoming central to modern drug discovery.

Keywords:
BRETBiasBiosensorsFunctional selectivityGPCR

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Area of Science:

  • Pharmacology
  • Molecular Biology
  • Biochemistry

Background:

  • G protein-coupled receptors (GPCRs) are crucial for human physiology and are major targets in drug discovery.
  • Despite a conserved structure, GPCRs exhibit unique ligand and pathway selectivity.
  • Understanding GPCR activation has evolved from simple binding assays to complex signal transduction pathways.

Purpose of the Study:

  • To discuss the evolution of biosensor technology for dissecting GPCR signaling.
  • To highlight how recent biosensor advancements support the concept of biased signaling in drug discovery.
  • To underscore the growing importance of pathway-specific drug targeting.

Main Methods:

  • Review of recent advancements in biosensor development for GPCRs.
  • Analysis of how biosensors elucidate pathway-specific receptor activation.
  • Discussion of the implications of biased signaling in drug discovery programs.

Main Results:

  • Biosensor technology has become sophisticated in dissecting individual GPCR signaling pathways.
  • Evidence strongly supports the concept that GPCRs can activate distinct signaling pathways independently.
  • Biased signaling offers a more nuanced understanding of receptor pharmacology.

Conclusions:

  • Recent biosensor developments reinforce the significance of biased signaling in GPCR drug discovery.
  • Targeting specific pathways offers potential for more selective and effective therapeutics.
  • Biased signaling is poised to become a mainstream strategy in pharmaceutical research.