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Related Experiment Videos

Cytoskeletal coordination during neuronal migration.

Bruce T Schaar1, Susan K McConnell

  • 1Department of Biological Sciences, Stanford University, Stanford, CA 94305, USA.

Proceedings of the National Academy of Sciences of the United States of America
|September 22, 2005
PubMed
Summary

Neuronal migration involves nucleus movement through stepwise interactions of microtubules, myosin II, and cell adhesion. These cytoskeletal dynamics are crucial for proper brain development.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Developmental Biology

Background:

  • Human and mouse genetics studies have identified key proteins involved in neuronal migration.
  • Understanding the precise cytoskeletal mechanisms driving neuronal migration is essential for comprehending brain development.

Purpose of the Study:

  • To investigate the cytoskeletal events underlying neuronal migration.
  • To characterize the process of nuclear translocation during saltatory movements in migrating neurons.

Main Methods:

  • Correlative electron microscopy of neurons in a 3D matrix.
  • Time-lapse imaging.
  • Pharmacological perturbation.

Main Results:

  • The formation of a cytoplasmic dilation in the leading process precedes nuclear translocation.

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  • Nuclear translocation occurs in saltatory movements into these dilations.
  • Nucleokinesis appears to require hierarchical interactions between microtubules, myosin II, and cell adhesion.

    • Conclusions:

    • Neuronal migration involves a coordinated process of leading process extension and nuclear translocation.
    • Stepwise interactions between cytoskeletal elements and cell adhesion molecules are hypothesized to couple these events.