Related Experiment Video
Updated: Jul 16, 2026
08:27
Single Synapse Indicators of Glutamate Release and Uptake in Acute Brain Slices from Normal and Huntington Mice
Published on: March 11, 2020
Glutamate exocytosis from astrocytes controls synaptic strength
Pascal Jourdain1, Linda H Bergersen, Khaleel Bhaukaurally
1Department of Cell Biology and Morphology, University of Lausanne, Rue du Bugnon 9, 1005 Lausanne, Switzerland.
Nature Neuroscience
|February 21, 2007
Summary
Glial cells release glutamate, enhancing synaptic strength via NMDA receptors. This pathway, activated by neuronal activity, demonstrates astrocytes" physiological control of synaptic function.
Area of Science:
- Neuroscience
- Cell Biology
- Synaptic Plasticity
Background:
- Glial cells modulate neuronal activity, but mechanisms of glial transmitter release are unclear.
- Understanding glial release is crucial for synaptic function and neurological disorders.
Purpose of the Study:
- To investigate the role of glutamate exocytosis from astrocytes in synaptic function.
- To elucidate the mechanisms and physiological relevance of glial glutamate release.
Main Methods:
- Electrophysiology in rat hippocampal slices.
- Immunohistochemistry and electron microscopy.
- Pharmacological manipulation of NMDA receptors and P2Y1 receptors.
Main Results:
- Astrocytic glutamate exocytosis enhances synaptic strength at excitatory synapses.
- This enhancement is mediated by ifenprodil-sensitive NMDA receptors (NMDARs) containing NR2B subunits.
- Glutamate release is regulated by neuronal activity via astrocytic P2Y1 receptors.
Conclusions:
- Astrocytes physiologically control synaptic activity through glutamate exocytosis.
- This study provides evidence for a novel glial regulatory pathway of synaptic transmission.
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