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Related Experiment Videos

Mice develop normally without tenascin.

Y Saga1, T Yagi, Y Ikawa

  • 1Laboratory of Cell Biology, Tsukuba Life Science Center, Institute of Physical and Chemical Research (RIKEN), Ibaraki, Japan.

Genes & Development
|October 1, 1992
PubMed
Summary
This summary is machine-generated.

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Mice lacking tenascin, an extracellular matrix protein, show no developmental abnormalities. This finding challenges the established role of tenascin in embryogenesis and morphogenetic phenomena.

Area of Science:

  • Developmental Biology
  • Extracellular Matrix Research
  • Genetics

Background:

  • Tenascin is an extracellular matrix protein with a restricted expression pattern during embryogenesis.
  • It has been previously implicated in various morphogenetic phenomena.

Purpose of the Study:

  • To directly assess the in vivo function of tenascin.
  • To investigate the necessity of tenascin during normal development.

Main Methods:

  • Generation of tenascin-null mutant mice by disrupting the tenascin gene with the lacZ gene.
  • Analysis of homozygous mutant mice for anatomical, histological, and reproductive abnormalities.
  • Assessment of the distribution of other extracellular matrix components.

Main Results:

Related Experiment Videos

  • Homozygous tenascin-null mutant mice were viable and fertile, born according to Mendelian laws.
  • No anatomical or histological abnormalities were observed in any tissues of the mutant mice.
  • The distribution of fibronectin, laminin, collagen, and proteoglycan remained largely unchanged.

Conclusions:

  • Mice lacking tenascin exhibit a normal phenotype, indicating no essential role in normal development.
  • These findings challenge the widely held theory of tenascin's critical function in embryogenesis and morphogenesis.
  • Further research may be needed to elucidate the precise functions of tenascin in specific contexts.