New insights into HLA-G mediated tolerance

G. Amodio, R. Sales de Albuquerque, S. Gregori

Research output: Contribution to journalArticlepeer-review

Abstract

Human Leukocyte Antigen G (HLA-G) is a nonclassical HLA class I molecule with well-characterized immunomodulatory activities. HLA-G was first described as a regulatory molecule that allows the fetus to elude the maternal immune response. In the last decade it has become evident that HLA-G is involved in modulating both innate and adaptive immune responses, in maintaining tolerance in autoimmune and inflammatory diseases and after transplantation, and in promoting immune escape in cancer and infectious diseases. HLA-G exerts its modulatory/regulatory functions directly by interacting with specific inhibitory receptors. The expression of HLA-G is finely tuned by genetic variations in the noncoding region of the locus. The recent discovery of dendritic cells-10 (DC-10) as naturally occurring HLA-G-expressing dendritic cells opens new perspectives in the identification of the molecular and cellular mechanisms underlying HLA-G-mediated tolerance. An overview on the HLA-G-mediated inhibition of innate and adaptive immune cells, on the genetic influence on HLA-G expression, and on HLA-G-expressing DC-10 is presented. Moreover, we discuss the central and critical role of DC-10 in the HLA-G-mediated tolerance.

Original languageEnglish
Pages (from-to)255-263
Number of pages9
JournalTissue Antigens
Volume84
Issue number3
DOIs
Publication statusPublished - 2014

Keywords

  • Fetal-maternal tolerance
  • HLA-G
  • Immune escape
  • Interleukin-10
  • T regulatory type 1 cells
  • Tolerogenic dendritic cells

ASJC Scopus subject areas

  • Immunology
  • Immunology and Allergy
  • Genetics
  • Medicine(all)

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