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Related Experiment Videos

Covalent coupling of neuralizing factors from Xenopus to Sepharose beads: no decrease of inducing activity.

J Born, P Hoppe, J Janeczek

    Cell Differentiation
    |September 1, 1986
    PubMed
    Summary
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    Two neural inducing factors from Xenopus gastrulae were immobilized on Sepharose particles. These factors, acting on the cell surface, induce neural development without being released.

    Area of Science:

    • Developmental biology
    • Molecular biology
    • Cell biology

    Background:

    • Neural induction is a critical process in early vertebrate development.
    • Understanding the molecular mechanisms of neural induction is key to developmental biology.
    • Xenopus laevis embryos are a well-established model for studying early vertebrate development.

    Purpose of the Study:

    • To investigate the mechanism of action of two identified neural inducing factors.
    • To determine if neural induction by these factors involves cell uptake or cell surface interaction.
    • To characterize the activity of immobilized neural inducing factors.

    Main Methods:

    • Isolation and purification of two neural inducing factors from Xenopus gastrulae.
    • Covalent binding of factors to CNBr-Sepharose or cross-linked CNBr-Sepharose particles.

    Related Experiment Videos

  • Incubation of protein-Sepharose complexes with competent ectoderm cells.
  • Assessment of neural inducing activity and factor release.

    • Main Results:

    • Immobilized neural inducing factors retained their activity.
    • Competent ectoderm cells did not internalize the protein-Sepharose complexes.
    • Neural induction occurred without the release of the bound factors.
    • Evidence suggests the factors act on the cell surface.

    Conclusions:

    • The neural inducing factors from Xenopus gastrulae act via cell surface interactions.
    • Immobilization techniques preserve the activity of neural inducers.
    • This study provides insights into the localization and mechanism of neural induction signaling.