Prolonged interleukin-2Ralpha expression on virus-specific CD8+ T cells favors terminal-effector differentiation in vivo

Immunity. 2010 Jan 29;32(1):91-103. doi: 10.1016/j.immuni.2009.11.010. Epub 2010 Jan 21.


CD25, the high-affinity interleukin-2 (IL-2) receptor alpha chain, is rapidly upregulated by antigen-specific CD8(+) T cells after T cell receptor stimulation. Here, we demonstrate that during an acute viral infection, CD25 expression is quite dynamic-after initial upregulation, a subset of virus-specific T cells sustains CD25 expression longer than the rest. At this time when there is distinct heterogeneity in CD25 expression, examination of the in vivo fate of effector cells revealed that CD25(lo) cells, which are relatively less sensitive to IL-2, preferentially upregulate CD127 and CD62L and give rise to functional long-lived memory cells. In contrast, CD25(hi) cells perceiving prolonged IL-2 signals proliferate more rapidly, are prone to apoptosis, exhibit a more pronounced effector phenotype, and appear to be terminally differentiated. Consistent with this, sustained IL-2 receptor signaling during expansion drove terminal-effector differentiation. These data support the hypothesis that prolonged IL-2 signals during priming promote terminal-effector differentiation.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Apoptosis / immunology
  • CD8-Positive T-Lymphocytes / cytology*
  • CD8-Positive T-Lymphocytes / immunology
  • CD8-Positive T-Lymphocytes / metabolism
  • Cell Differentiation / genetics
  • Cell Differentiation / immunology*
  • Cell Separation
  • Flow Cytometry
  • Gene Expression / genetics
  • Gene Expression / immunology
  • Immunologic Memory / genetics
  • Immunologic Memory / immunology
  • Interleukin-2 Receptor alpha Subunit / biosynthesis*
  • Interleukin-2 Receptor alpha Subunit / genetics
  • Interleukin-2 Receptor alpha Subunit / immunology
  • Mice
  • Mice, Inbred C57BL
  • Mice, Transgenic
  • Oligonucleotide Array Sequence Analysis
  • Reverse Transcriptase Polymerase Chain Reaction
  • Signal Transduction / immunology
  • T-Lymphocyte Subsets / cytology*
  • T-Lymphocyte Subsets / immunology
  • T-Lymphocyte Subsets / metabolism


  • Interleukin-2 Receptor alpha Subunit