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[Episodic angioedema with eosinophilia]

S Tomoe1, I Iwamoto

  • 1Second Department of Internal Medicine, Chiba University School of Medicine.

Nihon Rinsho. Japanese Journal of Clinical Medicine
|March 1, 1993
PubMed
Summary

Episodic angioedema with eosinophilia involves recurrent swelling, rash, and weight gain. Research suggests T cells and IL-5 may drive eosinophil activity in the skin, but triggers remain unclear.

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Area of Science:

  • Immunology
  • Dermatology
  • Allergy

Context:

  • The syndrome of episodic angioedema with eosinophilia, first described in 1984, presents with recurrent angioedema, urticaria, weight gain, elevated IgM, and significant blood and dermal eosinophilia.
  • Activated CD4+ T cells in the dermis suggest a role for T cell-derived cytokines, particularly Interleukin-5 (IL-5), in eosinophil recruitment and activation within the skin.

Purpose:

  • To explore the immunological underpinnings of episodic angioedema with eosinophilia.
  • To investigate the role of T cells and IL-5 in the pathogenesis of this syndrome.
  • To identify potential antigens and factors influencing eosinophil migration in affected patients.

Summary:

  • This syndrome is characterized by recurrent angioedema, urticaria, weight gain, elevated IgM, and eosinophil infiltration of the dermis.
  • Evidence points to activated CD4+ T cells and elevated serum IL-5 levels during exacerbations, implicating them in eosinophil-driven skin inflammation.
  • Key questions remain regarding the specific antigens triggering T cell activation and the mechanisms governing selective eosinophil homing to the skin.

Impact:

  • Advances understanding of complex allergic and inflammatory skin conditions.
  • Highlights the potential therapeutic relevance of targeting T cell pathways and IL-5 in managing this syndrome.
  • Provides a foundation for future research into the etiology and targeted treatments for episodic angioedema with eosinophilia.

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