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IgA: Structure, Function, and Developability.

Patrícia de Sousa-Pereira1,2, Jenny M Woof1

  • 1School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK.

Antibodies (Basel, Switzerland)
|December 11, 2019
PubMed
Summary
This summary is machine-generated.

Immunoglobulin A (IgA) is crucial for mucosal immunity, with more produced than all other antibodies combined. Its unique structure and function are paving the way for new IgA-based therapies.

Keywords:
CD89FcαRIIgAimmune evasionimmunoglobulin Astructuretherapeutic antibodies

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Area of Science:

  • Immunology
  • Microbiology
  • Biochemistry

Background:

  • Mucosal surfaces are primary sites of infection due to high exposure.
  • Immunoglobulin A (IgA) is the most abundant antibody class, vital for mucosal defense.
  • Pathogens have developed strategies to evade IgA-mediated immunity.

Purpose of the Study:

  • To highlight the critical role of IgA in mucosal immunity.
  • To explore the structure-function relationships of IgA.
  • To discuss the therapeutic potential of IgA.

Main Methods:

  • Review of existing literature on IgA structure and function.
  • Analysis of IgA's role in pathogen defense mechanisms.
  • Examination of IgA's interaction with FcαRI (CD89).

Main Results:

  • IgA is essential for neutralizing and clearing pathogens at mucosal sites.
  • Secretory IgA, often polymeric, and serum IgA, mainly monomeric, employ diverse mechanisms.
  • Pathogens have evolved counter-defense mechanisms against IgA.

Conclusions:

  • Understanding IgA structure-function is key to developing new therapies.
  • IgA-based monoclonal antibodies represent promising therapeutic agents.
  • Further research into IgA's capabilities will enhance its therapeutic applications.