CD Markers

Reviewer: Nat Pernick, M.D. (see Authors page)

Revised: 30 December 2015, last major update February 2002

Copyright: (c) 2002-2015,, Inc.

PubMed Search: CD89
Cite this page: CD89. website. Accessed October 19th, 2018.
Definition / general
  • Also called FCAR, FCalphaR
  • IgA Fc receptor, binds IgA and eliminates IgA coated targets
  • Induces phagocytosis, degranulation, respiratory burst and killing of microorganisms
  • Pathogenic group A and group B streptococci produce virulence factors that block the binding of IgA to CD89, inhibiting IgA-mediated immunity (J Biol Chem 2006;281:1389)
Uses by pathologists
  • No significant clinical use by pathologists
Positive staining - normal
  • Neutrophils, monocytes/macrophages, activated eosinophils, alveolar and splenic macrophages, interstitial dendritic cells
Negative staining
Additional references