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The microglial cytoskeleton: vimentin is localized within activated cells in situ

M B Graeber1, W J Streit, G W Kreutzberg

  • 1Department of Neuromorphology, Max-Planck-Institute for Psychiatry, Martinsried, FRG.

Journal of Neurocytology
|August 1, 1988
PubMed

Insights

Microglia, the brain's immune cells, exhibit remarkable plasticity due to an elaborate cytoskeleton. Vimentin, an intermediate filament protein, was identified in activated microglia, suggesting it as a marker for cellular activation states.

Area of Science:

  • Neuroscience
  • Cell Biology
  • Immunology

Background:

  • Microglia are highly plastic glial cells in the central nervous system (CNS), unlike astrocytes and oligodendrocytes.
  • This plasticity suggests a complex cytoskeleton underlying microglial cell shape changes.

Purpose of the Study:

  • To investigate the cytoskeletal components of microglia, particularly during activation.
  • To identify potential markers for activated microglial states.

Main Methods:

  • Application of a novel ultrastructural method.
  • Electron microscopic immunocytochemistry was used to detect protein localization.

Main Results:

  • The study demonstrated the presence of vimentin at intermediate filament sites within reactive microglia.
  • Microglia were stimulated by rat facial nerve axotomy to induce a reactive state.

Conclusions:

  • Vimentin expression is associated with activated microglia.
  • Vimentin may serve as a reliable marker for activated microglia and brain macrophages.

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