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Updated: Nov 1, 2025

Analyzing the Size, Shape, and Directionality of Networks of Coupled Astrocytes

Analyzing the Size, Shape, and Directionality of Networks of Coupled Astrocytes

Published on: October 4, 2018

HepaCAM controls astrocyte self-organization and coupling.

Katherine T Baldwin¹, Christabel X Tan¹, Samuel T Strader¹

¹Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA.

|June 25, 2021

Summary

HepaCAM, a cell adhesion molecule, guides astrocyte development and territory formation. Its disruption impairs astrocyte communication and neural function, potentially causing brain disorders.

Keywords:

astrocyte astrocyte development astrocyte-synapse interaction cell adhesion connexin gap junction synapse tiling

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Published on: August 16, 2018

Area of Science:

Neuroscience
Developmental Biology
Cell Biology

Background:

Astrocytes regulate synaptic development and function through cell adhesion molecules.
The mechanisms by which astrocytes coordinate self-organization and territory formation remain unclear.

Purpose of the Study:

To identify molecular mechanisms regulating astrocyte-astrocyte interactions during development.
To investigate the role of hepaCAM in astrocyte morphogenesis, territory partitioning, and gap junction coupling.

Main Methods:

Utilized mouse models with conditional deletion of Hepacam in developing astrocytes.
Analyzed astrocyte morphology, territorial organization, and gap junction coupling.
Assessed synaptic excitation-inhibition balance.

Main Results:

HepaCAM regulates astrocyte competition for territory and morphological complexity in the developing cortex.
Conditional deletion of Hepacam impairs astrocyte gap junction coupling and disrupts synaptic balance.
Mutations in HEPACAM are linked to human megalencephalic leukoencephalopathy with subcortical cysts.

Conclusions:

HepaCAM is crucial for astrocyte self-organization and territorial development.
Disruption of astrocyte self-organization mechanisms may underlie neurological pathologies like megalencephalic leukoencephalopathy.