Our hosting provider will be performing UPS maintenance on Tuesday, Oct 25, 2016 between 8 AM and 5 PM PDT. SciCrunch searching services will be down during this time.

Preparing your results

Our searching services are busy right now. Your search will reload in five seconds.

Forgot Password

If you have forgotten your password you can enter your email here and get a temporary password sent to your email.

A dual role of erbB2 in myelination and in expansion of the schwann cell precursor pool.


Neuregulin-1 provides an important axonally derived signal for the survival and growth of developing Schwann cells, which is transmitted by the ErbB2/ErbB3 receptor tyrosine kinases. Null mutations of the neuregulin-1, erbB2, or erbB3 mouse genes cause severe deficits in early Schwann cell development. Here, we employ Cre-loxP technology to introduce erbB2 mutations late in Schwann cell development, using a Krox20-cre allele. Cre-mediated erbB2 ablation occurs perinatally in peripheral nerves, but already at E11 within spinal roots. The mutant mice exhibit a widespread peripheral neuropathy characterized by abnormally thin myelin sheaths, containing fewer myelin wraps. In addition, in spinal roots the Schwann cell precursor pool is not correctly established. Thus, the Neuregulin signaling system functions during multiple stages of Schwann cell development and is essential for correct myelination. The thickness of the myelin sheath is determined by the axon diameter, and we suggest that trophic signals provided by the nerve determine the number of times a Schwann cell wraps an axon.

Pubmed ID: 10704452


  • Garratt AN
  • Voiculescu O
  • Topilko P
  • Charnay P
  • Birchmeier C


The Journal of cell biology

Publication Data

March 6, 2000

Associated Grants


Mesh Terms

  • Animals
  • Axons
  • Cell Count
  • DNA-Binding Proteins
  • Early Growth Response Protein 2
  • Gene Targeting
  • Genes, erbB-2
  • Integrases
  • Mice
  • Mice, Neurologic Mutants
  • Mutagenesis
  • Myelin Sheath
  • Neuregulin-1
  • Peripheral Nervous System Diseases
  • Recombination, Genetic
  • Schwann Cells
  • Sciatic Nerve
  • Signal Transduction
  • Spinal Nerve Roots
  • Stem Cells
  • Transcription Factors
  • Viral Proteins