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Evidence for multiple precursor cell types in the embryonic rat cerebral cortex

B P Williams1, J Price

  • 1National Institute for Medical Research, Mill Hill, London, United Kingdom.

Neuron
|June 1, 1995
PubMed
Summary

Early rat cerebral cortex development involves multipotential neuroepithelial cells, transitioning to specified precursor cells that generate neurons and astrocytes during midneurogenesis.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • Cortical precursor cells in the ventricular zone are thought to be specified for single cell types by midneurogenesis.
  • Evidence also suggests the existence of multipotential precursor cells within the developing cerebral cortex.

Purpose of the Study:

  • To investigate the developmental potential of rat cerebral cortical precursor cells.
  • To characterize different types of precursor cells and their roles during corticogenesis.

Main Methods:

  • Utilized retroviral vector labeling to trace the lineage and developmental potential of cortical precursor cells.
  • Cultured cortical cells from embryonic rats between 12 and 18 days of gestation.

Main Results:

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  • Identified specified precursor cells as early as embryonic day 12.
  • Observed bipotential precursor cells capable of generating both neurons and astrocytes.
  • Discovered multipotential neuroepithelial cells dominating early development, distinct from later specified precursors.

Conclusions:

  • Corticogenesis progresses through distinct developmental phases.
  • An early phase is characterized by multipotential neuroepithelial cells.
  • A later phase features multiple populations of specified precursor cells.