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Related Concept Videos

Role Of Notch Signalling In Intestinal Stem Cell Renewal01:12

Role Of Notch Signalling In Intestinal Stem Cell Renewal

Notch signaling was first discovered in Drosophila melanogaster, where it is involved in cell lineage differentiation. Notch signaling regulates the maintenance and differentiation of intestinal stem cells or ISCs by controlling the expression of atonal homolog 1 or Atoh1. Atoh1 directs cells to differentiate into secretory cells.
Direct cell-to-cell contact is needed for the activation of Notch signaling. The signal is initiated when a notch ligand binds to a receptor on an adjacent cell, also...

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Related Experiment Video

Updated: Jul 8, 2026

Analyzing Murine Schwann Cell Development Along Growing Axons
09:46

Analyzing Murine Schwann Cell Development Along Growing Axons

Published on: November 21, 2012

Signals that determine Schwann cell identity.

K R Jessen1, R Mirsky

  • 1Department of Anatomy and Developmental Biology, University College London, UK.

Journal of Anatomy
|July 2, 2002
PubMed
Summary
This summary is machine-generated.

The transcription factor Krox-20 is crucial for myelin differentiation in Schwann cells, interacting with neuregulin and TGF-beta. This finding advances understanding of peripheral nerve development and myelination.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • Schwann cell precursors arise from neural crest cells, but signals for glial lineage commitment remain unclear.
  • Survival and differentiation of Schwann cells are influenced by neuregulin-1 and endothelin.
  • Signals determining myelinating versus non-myelinating Schwann cell fates are largely unknown.

Purpose of the Study:

  • To investigate the role of transcription factors in Schwann cell lineage specification.
  • To identify key regulators of myelin differentiation in immature Schwann cells.
  • To explore interactions between Krox-20 and signaling pathways involved in myelination.

Main Methods:

  • In vitro gene transfer experiments.
  • Analysis of transcription factor roles (Sox-10, Oct-6, Krox-20).
  • Investigation of signaling pathway interactions (neuregulin, TGF-beta, Desert Hedgehog).

Main Results:

  • Krox-20 is a key target of myelin differentiation signals.
  • Krox-20 gene transfer induces phenotypic changes associated with myelinating Schwann cells.
  • Krox-20 interacts functionally with neuregulin and TGF-beta.
  • Desert Hedgehog, secreted by Schwann cells, directs peripheral nerve connective tissue sheath formation.

Conclusions:

  • Krox-20 is a critical regulator of Schwann cell myelin differentiation.
  • Understanding Krox-20's interactions provides insights into myelination regulation.
  • Further research is expected to uncover additional genes involved in peripheral nerve development.