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Insights into olfactory ensheathing cell development from a laser-microdissection and transcriptome-profiling

Surangi N Perera1, Ruth M Williams2, Rachel Lyne3

  • 1Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK.

Glia
|August 29, 2020
PubMed
Summary

Researchers identified novel molecular markers for olfactory ensheathing cells (OECs), crucial for olfactory axon development. The gene Ptprz1 acts as a brake on OEC differentiation and influences olfactory axon targeting.

Keywords:
OECsPtprz1Wnt pathwayboundary cap cellsneural crestoligodendrocytestrigeminal Schwann cells

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • Olfactory ensheathing cells (OECs) are specialized glial cells supporting olfactory neuron axons.
  • Understanding OEC development is key to neural regeneration and understanding glial diversity.
  • OECs share developmental origins with Schwann cells but exhibit distinct properties.

Purpose of the Study:

  • To identify novel molecular markers for developing mouse OECs.
  • To investigate molecular differences between OECs and Schwann cells.
  • To explore the role of Ptprz1 in OEC development and function.

Main Methods:

  • Unbiased laser microdissection and differential RNA-sequencing (RNA-seq).
  • In situ hybridization for validation of gene expression.
  • Mutant analysis to assess gene function.

Main Results:

  • Identified 25 novel markers for developing OECs, with 15 being OEC-specific.
  • Discovered Ptprz1 as a pan-OEC-specific gene.
  • Ptprz1 appears to inhibit OEC differentiation and is implicated in olfactory axon targeting defects upon its loss.

Conclusions:

  • The study provides new molecular insights into OEC development.
  • Highlights the diversification of neural crest-derived glia.
  • Ptprz1 is a key regulator of OEC differentiation and axon guidance.