Aire

Annu Rev Immunol. 2009;27:287-312. doi: 10.1146/annurev.immunol.25.022106.141532.

Abstract

Mutations in the transcriptional regulator, Aire, cause APECED, a polyglandular autoimmune disease with monogenic transmission. Animal models of APECED have revealed that Aire plays an important role in T cell tolerance induction in the thymus, mainly by promoting ectopic expression of a large repertoire of transcripts encoding proteins normally restricted to differentiated organs residing in the periphery. The absence of Aire results in impaired clonal deletion of self-reactive thymocytes, which escape into the periphery and attack a variety of organs. In addition, Aire is a proapoptotic factor, expressed at the final maturation stage of thymic medullary epithelial cells, a function that may promote cross-presentation of the antigens encoded by Aire-induced transcripts in these cells. Transcriptional regulation by Aire is unusual in being very broad, context-dependent, probabilistic, and noisy. Structure/function analyses and identification of its interaction partners suggest that Aire may impact transcription at several levels, including nucleosome displacement during elongation and transcript splicing or other aspects of maturation.

Publication types

  • Research Support, N.I.H., Extramural
  • Review

MeSH terms

  • Animals
  • Autoimmune Diseases / immunology
  • Autoimmune Diseases / metabolism
  • Cell Differentiation / immunology*
  • Epithelial Cells / immunology
  • Epithelial Cells / metabolism
  • Gene Expression Regulation
  • Humans
  • Immune Tolerance / immunology*
  • Mice
  • Polyendocrinopathies, Autoimmune / genetics
  • Polyendocrinopathies, Autoimmune / immunology*
  • Polyendocrinopathies, Autoimmune / metabolism
  • T-Lymphocytes, Regulatory / immunology
  • T-Lymphocytes, Regulatory / metabolism
  • Thymus Gland / immunology
  • Thymus Gland / metabolism
  • Transcription Factors / chemistry
  • Transcription Factors / genetics
  • Transcription Factors / immunology*
  • Transcription Factors / metabolism*

Substances

  • APECED protein
  • Transcription Factors