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GPCR voltage dependence controls neuronal plasticity and behavior.

Eyal Rozenfeld1,2, Merav Tauber3, Yair Ben-Chaim3

  • 1Department of Physiology and Pharmacology, Sackler School of Medicine, Tel Aviv University, Tel Aviv, 69978, Israel.

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|December 14, 2021
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Summary
This summary is machine-generated.

This study reveals that G-protein coupled receptors (GPCRs) in vivo are voltage-dependent, impacting neuronal potentiation and behavior. This voltage dependence is crucial for normal brain function, including learning and memory.

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Area of Science:

  • Neuroscience
  • Molecular Biology
  • Physiology

Background:

  • G-protein coupled receptors (GPCRs) are vital for brain function.
  • In vitro studies showed GPCRs are regulated by membrane potential.
  • In vivo relevance of GPCR voltage dependence remained unproven.

Purpose of the Study:

  • To demonstrate the in vivo physiological role of GPCR voltage dependence.
  • To investigate the contribution of voltage-dependent GPCRs to neuronal coding and behavior.
  • To explore the impact of voltage-independent GPCRs on neuronal potentiation and behavior.

Main Methods:

  • Utilized in vivo electrophysiology and behavioral assays in animal models.
  • Employed mutant animals expressing voltage-independent muscarinic receptors.
  • Investigated muscarinic GPCR-mediated neuronal potentiation and odor habituation.

Main Results:

  • Muscarinic GPCR-mediated neuronal potentiation in vivo is voltage dependent.
  • This voltage dependence was abolished in mutant animals with voltage-independent receptors.
  • Depolarization alone induced potentiation via voltage-dependent muscarinic receptors.
  • Voltage independence of muscarinic receptors led to increased odor habituation.

Conclusions:

  • Identified a physiological role for GPCR voltage dependence in vivo.
  • Demonstrated the crucial involvement of GPCR voltage dependence in neuronal plasticity and behavior.
  • Suggests GPCR voltage dependency is important for diverse neuronal functions, including learning and memory.