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Related Experiment Videos

The tenascin-C knockout revisited.

E J Mackie1, R P Tucker

  • 1School of Veterinary Science, University of Melbourne, Parkville, Victoria, Australia.

Journal of Cell Science
|November 5, 1999
PubMed
Summary
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Tenascin-C knockout mice reveal critical roles for this protein in neurological, immune, and tissue repair functions. These findings explain tenascin-C

Area of Science:

  • Extracellular matrix biology
  • Molecular genetics
  • Developmental biology

Background:

  • Tenascin-C is an extracellular matrix glycoprotein implicated in various biological processes.
  • Previous studies suggested tenascin-C knockout mice lacked observable abnormalities.
  • Recent research indicates potential roles for tenascin-C in physiological and pathological contexts.

Purpose of the Study:

  • To investigate the precise functions of tenascin-C using knockout mouse models.
  • To elucidate the physiological and pathological consequences of tenascin-C deficiency.
  • To understand the evolutionary significance of tenascin-C's conserved sequence.

Main Methods:

  • Generation and analysis of tenascin-C-knockout mice.
  • Behavioral and biochemical assessments of knockout mice.

Related Experiment Videos

  • Pathological interventions including snake venom and chemical induction.
  • Histological examination of tissue repair (skin, cornea, neuromuscular junctions).
  • In vitro studies of bone marrow hematopoietic activity.

    • Main Results:

    • Tenascin-C knockout mice exhibit abnormal behavior and brain chemistry.
    • Defects observed in neuromuscular junction structure/repair, glomerulonephritis recovery, and dermatitis.
    • Impaired corneal wound healing and reduced fibronectin expression in both skin and corneal wounds.
    • Defective hematopoietic activity in bone marrow from knockout mice.

    Conclusions:

    • Tenascin-C plays crucial roles in neurological function, immune response, and tissue repair.
    • The diverse defects in knockout mice highlight tenascin-C's importance in multiple physiological systems.
    • These findings provide a functional basis for the high phylogenetic conservation of tenascin-C.