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Analyzing the Size, Shape, and Directionality of Networks of Coupled Astrocytes
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Astrocytic modulation of neuronal signalling.

Sushmitha S Purushotham1, Yossi Buskila1,2

  • 1School of Medicine, Western Sydney University, Campbelltown, NSW, Australia.

Frontiers in Network Physiology
|June 19, 2023
PubMed
Summary

Astrocytes, once thought to be mere brain glue, are now known to be crucial for neuronal communication. This review details how astrocytes modulate brain function and the neurodegeneration linked to their impaired signalling.

Keywords:
astrocytesexcitabilityneuromodulationoscillationssynapse

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Area of Science:

  • Neuroscience
  • Cell Biology

Background:

  • Astrocytes are the most abundant glial cells in the brain.
  • Traditionally viewed as supportive cells, astrocytes are now recognized as active participants in neuronal communication.
  • Their roles extend from molecular to network levels within the central nervous system (CNS).

Purpose of the Study:

  • To review the diverse mechanisms by which astrocytes modulate brain function.
  • To differentiate between direct and indirect pathways of astrocyte influence on neuronal signalling.
  • To explore the link between astrocyte dysfunction and neurodegenerative diseases.

Main Methods:

  • Systematic review of current literature on astrocyte function.
  • Analysis of molecular, synaptic, cellular, and network level interactions.
  • Focus on pathways affecting neuronal signalling and their pathological consequences.

Main Results:

  • Astrocytes regulate neuronal activity by controlling extracellular ion and neurotransmitter concentrations.
  • Astrocytes release gliotransmitters that modulate neuronal function.
  • Impairment of astrocyte signalling pathways is implicated in neurodegeneration.

Conclusions:

  • Astrocytes are essential modulators of neuronal signalling and overall brain function.
  • Understanding astrocyte pathways is critical for comprehending CNS health and disease.
  • Dysfunctional astrocyte signalling contributes significantly to neurodegenerative conditions.