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Astrocytic modulation of neuronal excitability through K+ spatial buffering
Alba Bellot-Saez1, Orsolya Kékesi1, John W Morley1
1Biomedical Engineering and Neuroscience group, The MARCS Institute, School of Medicine, Western Sydney University, Penrith, NSW, Australia.
Neuroscience and Biobehavioral Reviews
|March 11, 2017
Summary
Astrocytes, a type of glial cell, regulate neuronal excitability through potassium ion (K+) clearance. Alterations in astrocytic activity can disrupt brain network oscillations and synchronous activity.
Area of Science:
- Neuroscience
- Cell Biology
Background:
- Neurons and glia are the two main cell types in the human brain.
- Glial cells, specifically astrocytes, modulate neuronal excitability via potassium ion (K+) clearance.
- Astrocytes are increasingly recognized for their crucial roles in synaptic function, plasticity, and overall brain health.
Purpose of the Study:
- To review the role of astrocytes in modulating neural networks through K+ clearance.
- To discuss how functional alterations in astrocytes lead to aberrant network activity.
Main Methods:
- Literature review focusing on astrocytic K+ clearance mechanisms.
- Discussion of historical and recent research on astrocyte-neuron interactions.
Main Results:
- Astrocytes play a vital role in regulating extracellular potassium levels, influencing neuronal excitability.
- Dysfunctional astrocytic activity can lead to abnormal brain network oscillations and synchronous firing.
Conclusions:
- Astrocytic K+ clearance is a fundamental mechanism for maintaining neural network stability.
- Understanding astrocytic function is key to comprehending neurological disorders characterized by aberrant network activity.
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