An invariant T cell receptor α chain defines a novel TAP-independent major histocompatibility complex class Ib-restricted α/β T cell subpopulation in mammals

Florence Tilloy, Emmanuel Treiner, Se Ho Park, Corinne Garcia, François Lemonnier, Henri De La Salle, Albert Bendelac, Marc Bonneville, Olivier Lantz

Research output: Contribution to journalArticle

355 Citations (Scopus)

Abstract

We describe here a new subset of T cells, found in humans, mice, and cattle. These cells bear a canonical T cell receptor (TCR) α chain containing hAV7S2 and AJ33 in humans and the homologous AV19-AJ33 in mice and cattle with a CDR3 of constant length. These T cells are CD4-CD8- double- negative (DN) T cells in the three species and also CD8αα in humans. In humans, their frequency was ~1/10 in DN, 1/50 in CD8α+, and 1/6,000 in CD4+ lymphocytes, and they display an activated/memory phenotype (CD45RA(lo)CD45RO+). They preferentially use hBV2S1 and hBV13 segments and have an oligoclonal Vβ repertoire suggesting peripheral expansions. These cells were present in major histocompatibility complex (MHC) class II- and transporter associated with antigen processing (TAP)-deficient humans and mice and also in classical MHC class I- and CD1-deficient mice but were absent from β2-microglobulin-deficient mice, indicating their probable selection by a nonclassical MHC class Ib molecule distinct from CD1. The conservation between mammalian species, the abundance, and the unique selection pattern suggest an important role for cells using this novel canonical TCR α chain.

Original languageEnglish
Pages (from-to)1907-1921
Number of pages15
JournalJournal of Experimental Medicine
Volume189
Issue number12
DOIs
Publication statusPublished - 1999 Jun 21

Keywords

  • CD4CD8T cells
  • Cattle
  • Humans
  • Invariant T cell receptor α chain
  • Mice

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

Fingerprint Dive into the research topics of 'An invariant T cell receptor α chain defines a novel TAP-independent major histocompatibility complex class Ib-restricted α/β T cell subpopulation in mammals'. Together they form a unique fingerprint.

  • Cite this