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G Protein-Coupled Receptors or GPCRs are membrane-bound receptors that transiently associate with heterotrimeric G proteins and induce an appropriate response to sensory stimuli such as light, odors, hormones, cytokines, or neurotransmitters.
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Related Experiment Video

Updated: May 21, 2025

Inducing Plasticity of Astrocytic Receptors by Manipulation of Neuronal Firing Rates
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Astrocytic G Protein-Coupled Receptors in Drug Addiction.

Alexander K Zinsmaier1, Eric J Nestler2, Yan Dong1

  • 1Department of Neuroscience, University of Pittsburgh, Pittsburgh, PA 15260, USA.

Engineering (Beijing, China)
|March 20, 2025
PubMed
Summary

Astrocytes, non-neuronal brain cells, critically influence drug addiction by modulating neural circuits. This review highlights astrocytic G protein-coupled receptors, like dopamine D1 and glutamate mGLUR5, in addiction mechanisms.

Keywords:
AddictionAstrocyteDopamineGPCRNucleus accumbensmGLUR5

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Area of Science:

  • Neuroscience
  • Cellular Biology
  • Pharmacology

Background:

  • Drug addiction research traditionally focused on neurons, but astrocytes play a crucial role.
  • Astrocytes modulate neuronal activity, synaptic transmission, and neural networks.
  • Astrocytic G protein-coupled receptors (GPCRs) integrate signals and regulate neural function.

Purpose of the Study:

  • To review the critical involvement of astrocytes in drug addiction.
  • To focus on astrocytic dopamine D1 receptors (D1R) and metabotropic glutamate receptor 5 (mGLUR5).
  • To explore the role of these GPCRs in regulating synapse and network functions in the nucleus accumbens.

Main Methods:

  • Literature review of astrocyte biology and substance-use disorders.
  • Detailed discussion of astrocytic D1R and mGLUR5 signaling pathways.
  • Analysis of their role in the nucleus accumbens and addiction-related behaviors.

Main Results:

  • Astrocytes significantly influence addiction-related behaviors.
  • Astrocytic D1Rs and mGLUR5s are key regulators of synaptic plasticity and network activity.
  • These GPCRs in astrocytes are implicated in the acquisition and maintenance of addiction.

Conclusions:

  • Astrocytes are critical cellular players in the neurobiology of drug addiction.
  • Targeting astrocytic GPCRs like D1R and mGLUR5 may offer novel therapeutic strategies.
  • This review provides a foundation for understanding astrocytic GPCRs in addiction and psychiatric disorders.