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Related Experiment Videos

Mast cell activity in experimental allergic encephalomyelitis.

F Levi-Schaffer1, N Riesel, D Soffer

  • 1Department of Pharmacology, Hebrew University-Hadassah Medical School, Jerusalem, Israel.

Molecular and Chemical Neuropathology
|October 1, 1991
PubMed
Summary

Peritoneal mast cells (MCs) decrease in number and function before experimental allergic encephalomyelitis (EAE) onset in rats, suggesting MCs contribute to disease induction, not its clinical expression.

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Area of Science:

  • Immunology
  • Neuroscience
  • Cell Biology

Background:

  • Experimental allergic encephalomyelitis (EAE) is a model for studying autoimmune CNS diseases.
  • Mast cells (MCs) are immune cells known to play roles in allergic and inflammatory responses.

Purpose of the Study:

  • To investigate the role of peritoneal mast cells (MCs) in the pathogenesis of experimental allergic encephalomyelitis (EAE).
  • To evaluate the number and functional reactivity of MCs during different phases of EAE.

Main Methods:

  • Quantification of peritoneal MCs using toluidine blue staining.
  • Measurement of MC activation via B-hexosaminidase (B-hex) release.
  • Histological examination of MCs in rat brain tissues.
  • Pharmacological modulation of MCs using nedocromil and compound 48/80.

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Main Results:

  • A significant decrease (40-65%) in peritoneal MC number and B-hex release was observed prior to EAE clinical onset.
  • MC levels and function normalized upon clinical recovery from EAE.
  • Preliminary brain histology suggested a similar early decrease in MCs.
  • Nedocromil administration delayed EAE onset slightly when given at induction; compound 48/80 had no significant effect.

Conclusions:

  • Peritoneal mast cells are involved in the early stages of EAE pathogenesis.
  • MCs may contribute to the induction phase of EAE rather than the effector phase.
  • These findings highlight a potential role for mast cells in the initiation of autoimmune neuroinflammation.