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Updated: Jun 16, 2026
09:21
BRET-based G Protein Biosensors for Measuring G Protein-Coupled Receptor Activity in Live Cells
Published on: November 7, 2025
CB(1) cannabinoid receptors and their associated proteins
Allyn C Howlett1, Lawrence C Blume, George D Dalton
1Department of Physiology and Pharmacology, Wake Forest University Health Sciences, Winston-Salem, NC 27157, USA. ahowlett@wfubmc.edu
Current Medicinal Chemistry
|February 20, 2010
Summary
Cannabinoid receptor 1 (CB1) are crucial in the brain and body, influencing neurotransmission and various diseases. Targeting CB1 receptors with new drugs may offer specific treatments for neurological and other disorders.
Area of Science:
- Neuroscience
- Molecular Biology
- Pharmacology
Background:
- Cannabinoid receptor 1 (CB1) are G-protein coupled receptors (GPCRs) predominantly found in neurons, playing a key role in modulating neurotransmission.
- CB1 receptor dysfunction is implicated in various neurological and psychiatric conditions, including addiction, motor deficits, schizophrenia, and mood disorders.
- Beyond the central nervous system, CB1 receptors are also expressed in peripheral tissues such as the liver, adipose, cardiovascular, and reproductive systems, and bone.
Purpose of the Study:
- To review the diverse signaling pathways and cellular functions of CB1 receptors.
- To highlight the role of interacting proteins in CB1 receptor trafficking and signaling.
- To explore the therapeutic potential of targeting CB1 receptors for specific cellular responses.
Main Methods:
- Literature review of studies on CB1 receptor signaling and function.
- Analysis of CB1 receptor interactions with G-protein subunits (Gi/o), kinases (MAPK), ion channels, and other signaling molecules.
- Examination of the role of accessory proteins like beta-arrestins, AP-3, GASP1, CRIP1a, and FAN in CB1 receptor regulation.
Main Results:
- CB1 receptor signal transduction involves Gi/o protein interaction, adenylyl cyclase inhibition, MAPK activation, and modulation of ion channels and nitric oxide signaling.
- CB1 receptors are localized to both the plasma membrane and internal organelles.
- Cellular trafficking and signaling are modulated by various interacting proteins, including beta-arrestins, AP-3, GASP1, CRIP1a, and FAN, which regulate ceramide signaling.
Conclusions:
- The diverse signaling mechanisms and protein interactions of CB1 receptors offer opportunities for developing targeted therapeutics.
- Agonists and allosteric modulators could be designed to selectively target cell-type-specific responses mediated by CB1 receptors.
- Further research into CB1 receptor-interacting proteins may unveil novel therapeutic strategies for a range of diseases.
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