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Related Experiment Video

Updated: Jan 31, 2026

Protocol for Three-dimensional Confocal Morphometric Analysis of Astrocytes
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Region-Specific Differences in Morphometric Features and Synaptic Colocalization of Astrocytes During Development.

Anze Testen1, Maryam Ali2, Hannah G Sexton3

  • 1Curriculum in Neuroscience, UNC Chapel Hill, United States; Department of Psychology and Neuroscience, UNC Chapel Hill, United States.

Neuroscience
|January 2, 2019
PubMed
Summary

Astrocytes in the medial prefrontal cortex (mPFC) mature into early adulthood, increasing their contact with synapses. This astrocyte maturation influences brain development during adolescence and beyond.

Keywords:
Lck-GFPadolescenceastrocytedevelopmentpostsynaptic density protein 95three-dimensional reconstruction

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Astrocyte Biology

Background:

  • Astrocytes are crucial for synapse formation, maturation, and synaptic transmission.
  • Astrocyte maturation during postnatal development, particularly adolescence, and its impact on astroglial-synaptic contact remain poorly understood.
  • The medial prefrontal cortex (mPFC) and dorsal hippocampus (dHipp) are vital for executive functions and memory, undergoing significant changes during adolescence.

Purpose of the Study:

  • To investigate the temporal maturation trajectories of astrocytes in the mPFC and dHipp during late postnatal development and early adulthood.
  • To determine if astrocyte maturation influences their association with synapses in these brain regions.

Main Methods:

  • Utilized an astrocyte-specific viral labeling technique.
  • Employed high-resolution single-cell astrocyte imaging.
  • Performed three-dimensional reconstruction of astrocytes.

Main Results:

  • Astrocytes in the mPFC exhibit continued maturation into emerging adulthood (postnatal day 70).
  • This ongoing mPFC astrocyte maturation correlates with a significant increase in colocalization with PSD-95, a postsynaptic marker.
  • Region-specific differences in astrocyte maturation trajectories were observed between the mPFC and dHipp.

Conclusions:

  • Astrocyte maturation is a protracted process extending into early adulthood, particularly in the mPFC.
  • Maturing astrocytes establish increased contact with postsynaptic sites, suggesting a dynamic role in synaptic plasticity.
  • These findings offer novel insights into region-specific astrocyte-synapse interactions during late CNS development and their implications for mPFC function.