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Related Experiment Videos

Thy-1 multimerization is correlated with neurite outgrowth.

N K Mahanthappa1, P H Patterson

  • 1Division of Biology, California Institute of Technology, Pasadena 91125.

Developmental Biology
|March 1, 1992
PubMed
Summary

Thy-1 protein exists in multiple forms that influence neurite outgrowth. Multimeric Thy-1 inhibits neurite sprouting, while monomeric forms promote it, impacting neuronal development.

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Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Thy-1 is abundant in the vertebrate nervous system.
  • Previous studies suggest Thy-1 inhibits neurite outgrowth and stabilizes neuronal processes.

Purpose of the Study:

  • Investigate Thy-1's homophilic interactions and their role in neurite outgrowth.
  • Determine how Thy-1 multimerization affects neuronal development.

Main Methods:

  • Gel filtration chromatography to analyze Thy-1 forms in neuronal and PC12 cell lysates.
  • Immunoaffinity purification of soluble Thy-1.
  • Testing synthetic peptides to assess effects on Thy-1 multimerization and neurite outgrowth.

Main Results:

  • Thy-1 exists in 25-, 45-, and 150-kDa forms, likely homomultimers.
  • The distribution of Thy-1 forms varies between neurons and PC12 cells, shifting upon NGF induction.
  • A specific peptide increased monomeric Thy-1 and promoted neurite outgrowth.

Conclusions:

  • Multimeric Thy-1 forms inhibit neurite outgrowth and sprouting.
  • Thy-1 multimerization may stabilize the cell membrane and cytoskeleton, affecting neuronal process extension.

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