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Related Concept Videos

Neurulation01:30

Neurulation

Neurulation is the embryological process which forms the precursors of the central nervous system and occurs after gastrulation has established the three primary cell layers of the embryo: ectoderm, mesoderm, and endoderm. In humans, the majority of this system is formed via primary neurulation, in which the central portion of the ectoderm—originally appearing as a flat sheet of cells—folds upwards and inwards, sealing off to form a hollow neural tube. As development proceeds, the anterior...
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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: Jul 10, 2026

Ex utero Electroporation and Whole Hemisphere Explants: A Simple Experimental Method for Studies of Early Cortical Development
13:47

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Published on: April 3, 2013

Ena/VASP Is Required for neuritogenesis in the developing cortex.

Adam V Kwiatkowski1, Douglas A Rubinson, Erik W Dent

  • 1Center for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.

Neuron
|November 9, 2007
PubMed
Summary
This summary is machine-generated.

Loss of Ena/VASP proteins in mice disrupts neuronal positioning and blocks axon formation by impairing neurite initiation. This highlights the critical role of actin regulation in mammalian brain development.

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Last Updated: Jul 10, 2026

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Developmental Biology

Background:

  • Mammalian cortical development involves complex processes like neuronal migration and neuritogenesis.
  • Understanding the cytoskeletal regulation of these processes is crucial for brain development research.

Purpose of the Study:

  • To investigate the role of Ena/VASP proteins in mammalian cortical development.
  • To elucidate the mechanisms by which these actin regulatory proteins influence neuronal structure and connectivity.

Main Methods:

  • Utilized murine models with genetic deletions of all three Ena/VASP proteins.
  • Analyzed neuronal migration, positioning, and neurite formation in the developing cortex.
  • Examined actin filament organization and filopodia dynamics in developing neurons.

Main Results:

  • Absence of Ena/VASP proteins led to neuronal ectopias and altered positioning within the cortical plate.
  • Complete loss of Ena/VASP proteins blocked axon fiber tract formation.
  • Defects in cortical fiber tracts resulted from a failure in neurite initiation, preceded by impaired actin bundling and filopodia formation.

Conclusions:

  • Murine Ena/VASP proteins are essential for proper cortical development, including neurite initiation and axon formation.
  • The actin cytoskeleton, regulated by Ena/VASP proteins, plays a critical role in establishing neuronal connections.
  • These findings offer insights into the molecular mechanisms governing neurite formation and cytoskeletal dynamics during corticogenesis.