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Related Experiment Video

Updated: Aug 27, 2025

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Displacement Binding Assay Using Human Cannabinoid CB2 Receptor-Transfected Cells.

Maria Grazia Cascio1, Pietro Marini1, Roger G Pertwee2

  • 1School of Medical Sciences, Institute of Medical Sciences, University of Aberdeen, Aberdeen, Scotland, UK.

Methods in Molecular Biology (Clifton, N.J.)
|September 24, 2022
PubMed
Summary

This study details a displacement binding assay using radioligands and Chinese Hamster Ovarian (CHO) cells with the human cannabinoid receptor 2 (CB2). This method efficiently determines if compounds bind with high affinity to the CB2 receptor.

Keywords:
AffinityAgonistAntagonistBindingCannabinoid CB2 receptorsLigandRadioligand

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Area of Science:

  • Pharmacology
  • Biochemistry
  • Cell Biology

Background:

  • Displacement binding assays are crucial for assessing compound-receptor interactions.
  • These assays are vital for drug discovery and understanding molecular targets.
  • The human cannabinoid receptor 2 (CB2) is a key target in various physiological processes.

Purpose of the Study:

  • To describe a specific displacement binding assay protocol.
  • To demonstrate the use of radioligands and transfected cells for receptor binding studies.
  • To validate a method for determining high-affinity binding to the human CB2 receptor.

Main Methods:

  • Utilizing a radioligand in conjunction with Chinese Hamster Ovarian (CHO) cells.
  • Employing cells stably transfected with the human cannabinoid CB2 receptor.
  • Performing displacement binding assays to quantify ligand-receptor interactions.

Main Results:

  • The described assay effectively measures the binding affinity of compounds to the CB2 receptor.
  • Successful implementation of the assay using radiolabeled ligands and CHO-CB2 cells.
  • Demonstrated high-affinity binding of tested compounds to the target receptor.

Conclusions:

  • The displacement binding assay is a reliable method for evaluating CB2 receptor ligands.
  • This assay provides a robust platform for screening potential therapeutic compounds.
  • The protocol is suitable for both plant-derived and synthetic compounds targeting the CB2 receptor.