Impact of glycans on T-cell tolerance to glycosylated self-antigens

Anthony W. Purcell, Ian R. Van Driel, Paul A. Gleeson

Research output: Contribution to journalReview ArticleResearchpeer-review

Abstract

There is now substantial evidence that antigen post-translational modifications are recognized by T cells, and alterations in epitope modification has been linked to a number of autoimmune diseases. An estimated one third of the MHC ligands contain post-translational modification of epitopes. A common post-translational modification of proteins is glycosylation and it is predicted on theoretical grounds that ∼1-5% of MHC ligands may bear a glycan. From numerous studies over the past 15 years it is clear that glycans can influence T cell responses either by contribution to the structure of the epitope or by influencing the profile of peptide epitopes presented by APCs. The influence of glycans on antigen processing and T cell recognition has particular relevance to the induction of tolerance to self-antigens. Here we discuss the potential impact of glycans on the profile of self-epitopes presented by APCs and the consequence of changes in glycosylation to generate neo self-epitopes resulting in the loss of tolerance and the development of autoimmune diseases. With the recent developments in profiling T cell epitopes, and with strategies for modulating glycosylation in vivo, it is now feasible to directly examine the global influence of glycans on self-tolerance and autoimmunity.

Original languageEnglish
Pages (from-to)574-579
Number of pages6
JournalImmunology and Cell Biology
Volume86
Issue number7
DOIs
Publication statusPublished - 1 Oct 2008
Externally publishedYes

Keywords

  • Carbohydrate
  • Glycans
  • Immune tolerance
  • T cell recognition

Cite this

Purcell, Anthony W. ; Van Driel, Ian R. ; Gleeson, Paul A. / Impact of glycans on T-cell tolerance to glycosylated self-antigens. In: Immunology and Cell Biology. 2008 ; Vol. 86, No. 7. pp. 574-579.
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Impact of glycans on T-cell tolerance to glycosylated self-antigens. / Purcell, Anthony W.; Van Driel, Ian R.; Gleeson, Paul A.

In: Immunology and Cell Biology, Vol. 86, No. 7, 01.10.2008, p. 574-579.

Research output: Contribution to journalReview ArticleResearchpeer-review

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