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Related Experiment Videos

Glial-defined rhombomere boundaries in developing Xenopus hindbrain.

M Yoshida1, D R Colman

  • 1Program in Cell Adhesion, Department of Biochemistry and Molecular Biology, The Mount Sinai School of Medicine, New York, New York 10029, USA. yoshida@msvax.mssm.edu

The Journal of Comparative Neurology
|July 11, 2000
PubMed
Summary

Specialized radial glia define hindbrain boundaries during development. Distinct expression patterns of DM gamma, vimentin, and glial fibrillary acidic protein in these glia establish rhombomere topology.

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Area of Science:

  • Neuroscience
  • Developmental Biology
  • Cell Biology

Background:

  • The vertebrate central nervous system (CNS) exhibits regional specialization during development.
  • Rhombomeres in the hindbrain delineate distinct CNS regions and neural structures.
  • The cellular basis for boundaries between rhombomeres is not fully understood.

Purpose of the Study:

  • To investigate the cellular structures defining rhombomere boundaries in developing Xenopus.
  • To identify specific glial cell populations and molecular markers involved in hindbrain patterning.
  • To elucidate the role of radial glia in establishing rhombomere topology.

Main Methods:

  • Analysis of DM gamma, vimentin, and glial fibrillary acidic protein expression in developing Xenopus hindbrain.

Related Experiment Videos

  • Localization studies of protein and transcript expression in radial glia.
  • Morphological characterization of radial glial processes in boundary and center regions.

    • Main Results:

    • DM gamma protein is exclusively expressed in radial glial processes at rhombomere boundary regions.
    • Vimentin localizes to boundary regions, while glial fibrillary acidic protein is restricted to rhombomere centers.
    • Radial glial processes exhibit distinct morphologies in boundary versus center regions, with boundary glia extending in a fan-shaped manner.

    Conclusions:

    • Radial glia are specified into distinct subsets with unique biochemical and morphological characteristics.
    • These distinct radial glial subsets play a crucial role in establishing rhombomere boundaries and overall hindbrain topology.
    • Early specification of radial glia subsets is a key event in CNS regionalization.