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Related Experiment Videos

Aging Schwann cells in vitro.

Dorothee Funk1, Cornelia Fricke, Burkhard Schlosshauer

  • 1NMI, Naturwissenschaftliches und Medizinisches Institut an der Universität Tübingen, Markwiesenstr. 55, D-72770 Reutlingen, Germany.

European Journal of Cell Biology
|February 20, 2007
PubMed
Summary
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Aged Schwann cells (SCs) show enhanced axonal outgrowth and proliferation but reduced adhesion, suggesting improved regeneration potential. However, due to karyotype changes, aged SCs are not recommended for tissue engineering applications.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Tissue Engineering

Background:

  • Schwann cells (SCs) are crucial for peripheral and central nervous system regeneration.
  • In vitro expansion is necessary for neuronal tissue engineering, but its effects on SCs are not fully understood.

Purpose of the Study:

  • To investigate the impact of in vitro aging on Schwann cell characteristics.
  • To compare young and aged rat SCs for potential tissue engineering applications.

Main Methods:

  • Cultured rat SCs were categorized as 'young' (short-term) or 'aged' (long-term).
  • Nine cell parameters, including axonal outgrowth, adhesion, morphology, proliferation, and karyotype, were analyzed.
  • Tumorigenic characteristics like telomerase activity and anchorage dependence were assessed.

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Main Results:

  • Aged SCs exhibited doubled axonal outgrowth and reduced adhesion compared to young SCs.
  • Proliferation in aged SCs was serum-independent and unaffected by contact inhibition, with reduced doubling times.
  • Despite significant karyotype changes, aged SCs did not display tumorigenic markers.

Conclusions:

  • Extensive in vitro expansion of SCs alters their properties, enhancing neurite outgrowth promotion but not inducing tumorigenesis.
  • Aged SCs possess characteristics that might suggest improved regeneration qualities.
  • In vitro aged rat SCs (over 11 passages) are not recommended for tissue engineering due to potential risks associated with altered cell characteristics.