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Related Concept Videos

Long-term Potentiation01:25

Long-term Potentiation

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Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
Hebbian LTP
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Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
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G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...
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Related Experiment Video

Updated: Jun 13, 2025

A High-content Assay for Monitoring AMPA Receptor Trafficking
10:34

A High-content Assay for Monitoring AMPA Receptor Trafficking

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Rab10 inactivation promotes AMPAR trafficking and spine enlargement during long-term potentiation.

Jie Wang1,2,3, Jun Nishiyama2,4, Paula Parra-Bueno2

  • 1Department of Neurobiology, Duke University School of Medicine, Durham, NC, 27710, USA.

Biorxiv : the Preprint Server for Biology
|June 12, 2025
PubMed
Summary

Rab proteins regulate synaptic plasticity. Inactivating Rab10 enhances long-term potentiation (LTP) and AMPA receptor trafficking, while Rab4 activation is transiently important for early LTP stages.

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Improved Preparation and Preservation of Hippocampal Mouse Slices for a Very Stable and Reproducible Recording of Long-term Potentiation
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Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Rab proteins are key regulators of membrane trafficking.
  • Dendritic spine plasticity is crucial for learning and memory.
  • Synaptic plasticity involves structural and functional changes in dendritic spines.

Purpose of the Study:

  • To investigate the roles of Rab10 and Rab4 in synaptic plasticity.
  • To monitor Rab protein activity in single dendritic spines during structural long-term potentiation (sLTP).

Main Methods:

  • Development of sensitive sensors for Rab protein activity.
  • Monitoring Rab activity in single dendritic spines in rodent organotypic hippocampal slices during sLTP.
  • Inhibition and deletion of Rab proteins to assess their function.

Main Results:

  • Rab10 was persistently inactivated during sLTP, while Rab4 was transiently activated.
  • Inhibiting or deleting Rab10 enhanced sLTP, LTP, and AMPA receptor trafficking.
  • Disrupting Rab4 impaired early sLTP and decreased AMPA receptor trafficking.

Conclusions:

  • Rab10 and Rab4 oppositely regulate AMPA receptor trafficking during sLTP.
  • Rab10 inactivation facilitates LTP induction and associated spine structural plasticity.