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Related Experiment Videos

Connective tissues: signalling by tenascins.

Ruth Chiquet-Ehrismann1, Richard P Tucker

  • 1Friedrich Miescher Institute for Biomedical Research, Maulbeerstrasse 66, CH-4058 Basel, Switzerland. chiquet@fmi.ch

The International Journal of Biochemistry & Cell Biology
|April 20, 2004
PubMed
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Tenascin glycoproteins, secreted by connective tissue cells, are vital for extracellular matrix structure and cell signaling. Different tenascins play key roles in tissue repair, development, and disease, influencing cell behavior and tissue integrity.

Area of Science:

  • Biochemistry
  • Cell Biology
  • Extracellular Matrix Research

Background:

  • Connective tissue cells secrete various tenascins, glycoproteins crucial for extracellular matrix (ECM) structure and cell physiology.
  • Tenascin expression is influenced by mechanical stress and cell type, with specific roles in tumor microenvironments, wound healing, and inflammation.
  • Different tenascin family members (Tenascin-C, -X, -R, -W) exhibit distinct tissue distributions and functions.

Purpose of the Study:

  • To elucidate the diverse roles of tenascin glycoproteins in connective tissues.
  • To understand the regulation and impact of tenascins on cell signaling pathways and tissue-specific functions.
  • To highlight the involvement of tenascins in physiological processes and pathological conditions.

Main Methods:

Related Experiment Videos

  • Analysis of tenascin expression patterns in various tissues and cell types.
  • Review of literature on tenascin function in ECM structure and cell signaling.
  • Correlation of tenascin deficiency with specific diseases like Ehlers Danlos syndrome.

Main Results:

  • Tenascin-C is upregulated in tumors, wounds, and inflamed tissues, influencing cell morphology, growth, and migration via integrin and syndecan signaling.
  • Tenascin-X is essential for collagen fiber organization in the dermis; its deficiency causes Ehlers Danlos syndrome.
  • Tenascin-R and -C are prominent in the nervous system, affecting neurite outgrowth and synaptic function, while Tenascin-W is found in bone, muscle, and kidney ECM.

Conclusions:

  • Tenascin glycoproteins are key regulators of ECM composition and cell behavior across diverse tissues.
  • Specific tenascins play critical roles in tissue development, repair, and homeostasis, with dysregulation linked to disease.
  • Understanding tenascin functions provides insights into tissue engineering, regenerative medicine, and disease pathogenesis.