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Related Experiment Videos

UNC5C is required for spinal accessory motor neuron development.

A K Dillon1, A R Jevince, L Hinck

  • 1Department of Neuroscience, Albert Einstein College of Medicine, Bronx, NY 10461, USA.

Molecular and Cellular Neurosciences
|June 5, 2007
PubMed
Summary
This summary is machine-generated.

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Spinal accessory motor neuron (SACMN) migration relies on Netrin-1 and DCC. The study reveals UNC5C is crucial for SACMN cell bodies to move away from the ventral midline during development.

Area of Science:

  • Developmental Neuroscience
  • Molecular Neuroscience
  • Cell Migration

Background:

  • UNC5 receptors are known to mediate chemorepulsion from Netrin sources in various species.
  • Spinal accessory motor neurons (SACMN) exhibit a unique dorsal migration pattern away from the ventral midline.
  • Netrin-1 and DCC signaling are essential for SACMN cell body migration in vivo.

Purpose of the Study:

  • To investigate the role of vertebrate UNC5 proteins in the repulsion of SACMN from the Netrin-rich ventral midline.
  • To determine which UNC5 receptor subtypes are expressed by SACMN.

Main Methods:

  • Analysis of SACMN migration in UNC5A null mice.
  • Analysis of SACMN migration in UNC5C null mouse embryos.
  • Assessment of UNC5A and UNC5C expression in SACMN.

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Main Results:

  • SACMN were found to likely express UNC5A and UNC5C.
  • SACMN development and migration were unaffected in UNC5A null mice.
  • Absence of UNC5C led to SACMN cell bodies failing to migrate dorsally, clustering ventrolaterally.

Conclusions:

  • UNC5C plays a critical role in the proper migration of spinal accessory motor neuron cell bodies during embryonic development.
  • UNC5C mediates the repulsion of SACMN from the ventral midline, ensuring their correct trajectory.