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Related Experiment Videos

Nerve growth cone motility.

K Lankford1, C Cypher, P Letourneau

  • 1Department of Cell Biology and Neuroanatomy, University of Minnesota, Minneapolis.

Current Opinion in Cell Biology
|February 1, 1990
PubMed
Summary

Recent advances clarify neurite outgrowth, highlighting the roles of extracellular signals, growth-associated proteins (GAP-43), and cytoskeletal dynamics. Cytoplasmic calcium and actin filament stability are key mediators of growth cone behavior and motility.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Neurite outgrowth and growth cone behavior are complex processes influenced by numerous cellular factors.
  • Understanding these interactions is crucial for deciphering neural development and repair.

Purpose of the Study:

  • To review recent advances in understanding the control of neurite outgrowth and growth cone behavior.
  • To highlight the inter-relationships between extracellular influences, cell phenotype, growth-associated proteins, second messengers, and cytoskeletal components.

Main Methods:

  • Literature review and synthesis of recent findings in the field.
  • Analysis of experimental data on neurite extension, growth cone dynamics, and molecular signaling pathways.

Main Results:

  • Early events in neurite initiation and microtubule stabilization are better understood.
  • Mechanical forces in neurite extension are being quantified, and actin-microtubule interactions are characterized.
  • Evidence supports a functional role for growth-associated protein 43 (GAP-43) in motility.
  • Cytoplasmic calcium is implicated as a central mediator of growth regulation, with actin filament stability mediating calcium's behavioral effects.

Conclusions:

  • Significant progress has been made in understanding the molecular and mechanical control of neurite outgrowth.
  • Cytoplasmic calcium and actin dynamics play critical roles in mediating growth cone behavior and neuronal motility.

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