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Humanized Mediator Release Assay as a Read-Out for Allergen Potency
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Complement-mediated immune mechanisms in allergy.

Yves Laumonnier1,2,3, Rabia Ülkü Korkmaz1, Alicja A Nowacka1

  • 1Institute for Systemic Inflammation Research, University of Lübeck, Lübeck, Germany.

European Journal of Immunology
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The complement system significantly influences allergic diseases by releasing mediators like anaphylatoxins C3a and C5a. Targeting this system offers potential therapeutic strategies for allergies.

Keywords:
AllergyAnaphylatoxin receptorsC3C5Complement

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Area of Science:

  • Immunology
  • Allergy Research
  • Complement System Biology

Background:

  • Allergic conditions involve the complement system's activation, releasing inflammatory mediators.
  • Complement sensors, regulators, and mediators play roles in allergy development and immune responses.
  • Key mediators include C3 and C5 cleavage fragments, such as anaphylatoxins C3a and C5a.

Purpose of the Study:

  • To review the roles of complement system components in allergic diseases.
  • To highlight the impact of anaphylatoxins C3a and C5a on allergic inflammation.
  • To discuss therapeutic targeting of the complement system in allergies.

Main Methods:

  • Literature review and synthesis of current research on complement and allergies.
  • Focus on anaphylatoxins (C3a, C5a) and their receptors on immune effector cells.
  • Discussion of complement's role in type 2 immunity and innate lymphoid cell activation.

Main Results:

  • Complement activation releases mediators that regulate immune responses during allergen sensitization and effector phases.
  • Anaphylatoxins C3a and C5a, acting on their receptors, are crucial in allergic effector cell function.
  • Complement pathways influence maladaptive type 2 immunity and innate lymphoid cell dynamics.

Conclusions:

  • The complement system is integral to the pathogenesis of allergic airway diseases, food allergies, and anaphylaxis.
  • Anaphylatoxins C3a and C5a are key players in driving allergic inflammation and type 2 immunity.
  • Targeting the complement system presents a promising therapeutic avenue for managing allergic conditions.