Fc glycan-modulated immunoglobulin G effector functions

Isaak Quast, Jan D. Lünemann

Research output: Contribution to journalArticleOtherpeer-review

30 Citations (Scopus)

Abstract

Immunoglobulin G (IgG) molecules are glycoproteins and residues in the sugar moiety attached to the IgG constant fragment (Fc) are essential for IgG functionality such as binding to cellular Fc receptors and complement activation. The core of this sugar moiety consists of a bi-antennary heptameric structure of mannose and N-acetylglucosamine (GlcNAc), further decorated with terminal and branching residues including galactose, sialic acid, fucose, and GlcNAc. Presence or absence of distinct residues such as fucose and sialic acid can dramatically alter pro- and anti-inflammatory IgG activities which could be harnessed for immunotherapeutic purposes. Here we review recent advances in understanding the role of the IgG-Fc glycan during immune responses and for immunotherapy with a focus on sialic acid and intravenous immunoglobulin (IVIG) treatment.

Original languageEnglish
Number of pages5
JournalJournal of Clinical Immunology
Volume34
Issue numberSUPPL. 1
DOIs
Publication statusPublished - 1 Jan 2014
Externally publishedYes

Keywords

  • CIDP
  • Fc
  • IgG
  • IVIG
  • Sialic acid

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