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Tenascin function and regulation of expression

N Vrucinić-Filipi1, R Chiquet-Ehrismann

  • 1Friedrich Miescher Institute, Basel, Switzerland.

Symposia of the Society for Experimental Biology
|January 1, 1993
PubMed
Summary
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Tenascin, an extracellular matrix protein, exhibits both adhesive and anti-adhesive properties. Its expression is dynamically regulated during development and tissue remodeling.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Developmental Biology

Background:

  • Tenascin is a large, hexameric extracellular matrix protein with diverse structural domains.
  • Its expression patterns are significant in tissue remodeling and neural development.

Purpose of the Study:

  • To present a new nomenclature for tenascin's fibronectin type III repeats.
  • To investigate tenascin's adhesive and anti-adhesive functions.
  • To explore the regulation of tenascin expression.

Main Methods:

  • Structural domain analysis of tenascin subunits.
  • Use of recombinant tenascin fragments to identify functional regions.
  • Investigation of tenascin expression regulation in primary cell cultures.

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Main Results:

  • A novel nomenclature for fibronectin type III repeats was proposed, enabling cross-species comparison.
  • Tenascin exhibits distinct adhesive (growth cone support) and anti-adhesive (cell spreading inhibition) functions.
  • Specific adhesive and anti-adhesive regions within tenascin were identified.

Conclusions:

  • Tenascin's complex structure underlies its dual functional roles in cell adhesion and neurite extension.
  • Understanding tenascin's regulation is crucial given its transient expression during key biological processes.