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Related Concept Videos

Glial Cells01:04

Glial Cells

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Glia, or neuroglia, are vital support cells that assist neurons in their functions. The term "glia" originates from the Greek word for "glue," reflecting their role in holding the nervous system together. These cells can be categorized into six types: four in the central nervous system (CNS) and two in the peripheral nervous system (PNS).
The CNS glial cell includes the astrocytes, the oligodendrocytes, the microglia, and the ependymal cells.
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In the CNS, neurogenesis, the birth of new neurons from stem cells, is limited to the hippocampus in adults. In other regions of the brain and spinal cord, neurogenesis is almost non-existent due to inhibitory influences from neuroglia, especially oligodendrocytes, and the absence of growth-stimulating cues. The myelin produced by oligodendrocytes in the CNS inhibits neuronal regeneration. Furthermore, astrocytes proliferate rapidly after neuronal damage, forming scar tissue that physically...
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Related Experiment Video

Updated: Sep 12, 2025

Dissection and Isolation of Murine Glia from Multiple Central Nervous System Regions
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Glia Preserve Their Own Functions While Compensating for Neighboring Glial Cell Dysfunction.

Allison N Beachum1, Gabriela Salazar1, Amelia Nachbar1

  • 1Department of Neuroscience, University of Virginia, Charlottesville, Virginia, USA.

Glia
|August 6, 2025
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Summary

When Drosophila cortex glia (CG) are damaged, other glial cells like astrocytes and ensheathing glia (EG) compensate for lost functions, demonstrating glial resilience and adaptability in maintaining nervous system homeostasis.

Keywords:
drosophilaastrocytescortex gliaengulfmentensheathing gliafunctional compensationglial tilingglial‐glial interactionsneuronal deathsubperineurial glia

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Developmental Biology

Background:

  • Glial cells are crucial for nervous system function, but glial-glial interactions are less understood than glial-neuronal interactions.
  • Previous research showed Spätzle 3 (Spz3) loss in Drosophila cortex glia (CG) causes CG morphological degradation and loss of neuronal interactions.

Purpose of the Study:

  • To investigate glial-glial interactions and compensatory mechanisms following cortex glia (CG) disruption.
  • To determine if neighboring glial cells can compensate for lost CG functions and maintain central nervous system (CNS) homeostasis.

Main Methods:

  • Utilized Drosophila melanogaster as a model organism.
  • Investigated the effects of Spätzle 3 (Spz3) loss in cortex glia (CG).
  • Observed glial cell morphology, interactions, and functions, including Draper-mediated engulfment and CNS growth inhibition.

Main Results:

  • Loss of CG-neuron interactions triggered aberrant infiltration by astrocytes, ensheathing glia (EG), and subperineurial glia (SPG).
  • Aberrant glial processes compensated for CG functions like apoptotic corpse clearance.
  • Neighboring glia maintained their homeostatic roles (synaptic remodeling, debris clearance, blood-brain barrier regulation) while compensating for CG loss.

Conclusions:

  • Multiple glial subtypes can dynamically respond to glial dysfunction to preserve CNS homeostasis.
  • Glial cells exhibit remarkable resilience and adaptability across subtypes in response to injury or disruption.