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Related Experiment Video

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Secretory function in subplate neurons during cortical development.

Shinichi Kondo1, Hannah Al-Hasani1, Anna Hoerder-Suabedissen1

  • 1Department of Physiology, Anatomy and Genetics, University of Oxford Oxford, UK.

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|April 11, 2015
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Summary

Subplate neurons, crucial for cortical wiring, may have a transient secretory function. These early neurons exhibit endoplasmic reticulum stress and express genes for secreted proteins like neuroserpin, influencing brain development.

Keywords:
ER stress conditioncerebral cortexneuroserpinrough endoplasmic reticulumserpini1subplate neuronsultrastructural analysis

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • Subplate neurons are among the earliest neurons in the mammalian cerebral cortex.
  • They play a critical role in establishing cortical wiring.
  • Some subplate neurons in rodents persist into adulthood.

Purpose of the Study:

  • To highlight converging findings suggesting a novel secretory function of subplate neurons during cortical development.
  • To investigate the molecular mechanisms underlying this proposed function.

Main Methods:

  • Analysis of gene expression in subplate neurons compared to layer 6 neurons.
  • Examination of endoplasmic reticulum (ER) structure and stress markers in subplate neurons.
  • Localization studies of secreted proteins within subplate cells.

Main Results:

  • Subplate neurons exhibit highly developed rough endoplasmic reticulum (ER) and are under ER stress postnatally.
  • Gene expression analysis revealed high expression of several secreted protein-encoding genes in subplate neurons.
  • Neuroserpin (serpini1), a secreted protein, was found localized to the ER in subplate cells.

Conclusions:

  • Subplate neurons possess a transient secretory function during cortical development.
  • This secretory activity, involving proteins like neuroserpin, may influence cortical circuit formation.
  • Further research is needed to fully elucidate the role of subplate neuron secretion in brain development.