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Related Experiment Videos

Cytoarchitecture in cultured rat neocortex explants.

B M de Jong1, J M Ruijter, H J Romijn

  • 1Netherlands Institute for Brain Research, Amsterdam.

International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience
|January 1, 1988
PubMed
Summary

Rat neocortex explants cultured in vitro retain structure and show neuronal maturation. Cell death and glial reactivity changes offer insights into cerebral cortex development and neuronal circuitry formation.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • The developing cerebral cortex is a complex structure crucial for cognitive functions.
  • Understanding neuronal circuitry formation in vitro provides insights into developmental processes.
  • Rat neocortex explants offer a model system to study cortical development.

Purpose of the Study:

  • To investigate the cytoarchitectural and maturational changes in rat neocortex explants cultured in vitro.
  • To identify similarities and differences between in vitro cultured neocortex and in vivo development.
  • To explore the potential of these explants for studying neuronal circuitry formation.

Main Methods:

  • Rat pups (6-day-old) neocortex explants were cultured in a serum-free medium.

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  • Cultures were maintained from 5 hours to 13 days in vitro (DIV).
  • Cytoarchitectural characteristics, neuronal arrangement, cell degeneration, and glial fibrillary acidic (GFA) protein reactivity were analyzed.

    • Main Results:

    • Explants preserved cytoarchitectural characteristics with significant changes in size and layers within the first 2 DIV.
    • Radial arrangement of neurons in layers 2-3-4 indicated maturation, while layer 4 was not consistently distinct.
    • Cell transposition towards the pial surface and degeneration in layer 5 were observed, suggesting functional cell death. GFA reactivity increased markedly compared to in vivo conditions.

    Conclusions:

    • Rat neocortex explants exhibit preserved structure and neuronal maturation, offering a valuable model for developmental studies.
    • Observed cellular changes, including degeneration and glial reactivity, provide insights into the mechanisms of neuronal circuitry formation.
    • Both similarities and differences between in vitro and in vivo development in these explants are significant for understanding cerebral cortex development.