Activating CD94:NKG2C and inhibitory CD94:NKG2A receptors are expressed by distinct subsets of committed CD8+ TCR alphabeta lymphocytes

Eur J Immunol. 2004 Dec;34(12):3456-64. doi: 10.1002/eji.200425210.

Abstract

A subset of CD8(+) T cells express the natural killer cell receptors CD94:NKG2A or CD94:NKG2C. We found that although many CD8(+) T cells transcribe CD94 and NKG2C, expression of a functional CD94:NKG2C receptor is restricted to highly differentiated effector cells. CD94:NKG2A is expressed by a different subset consisting of CCR7(+) memory cells and CCR7(-) effector cells. Since NKG2A can only be induced on naive CD8(+) T cells while CD94(-) memory cells are refractory, it is likely that commitment to the CD94:NKG2A(+) subset occurs during the first encounter with antigen. CCR7(+)CD94:NKG2A(+) T cells recirculate through lymph nodes where upon activation, they produce large quantities of IFN-gamma. These cells occur as a separate CD94:NKG2A(+) T cell lineage with a distinct TCR repertoire that differs from that of the other CD8(+)CD94(-) T cells activated in situ.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antigens, CD / immunology*
  • CD8-Positive T-Lymphocytes / immunology*
  • CD8-Positive T-Lymphocytes / metabolism
  • Humans
  • Immunologic Memory / immunology
  • Interferon-gamma / metabolism
  • Lectins, C-Type / immunology*
  • NK Cell Lectin-Like Receptor Subfamily C
  • NK Cell Lectin-Like Receptor Subfamily D
  • Receptors, Antigen, T-Cell / immunology*
  • Receptors, Immunologic / immunology*
  • Receptors, Natural Killer Cell
  • T-Lymphocyte Subsets / immunology

Substances

  • Antigens, CD
  • KLRC1 protein, human
  • KLRC2 protein, human
  • KLRD1 protein, human
  • Lectins, C-Type
  • NK Cell Lectin-Like Receptor Subfamily C
  • NK Cell Lectin-Like Receptor Subfamily D
  • Receptors, Antigen, T-Cell
  • Receptors, Immunologic
  • Receptors, Natural Killer Cell
  • Interferon-gamma