In situ imaging reveals different responses by naïve and memory CD8 T cells to late antigen presentation by lymph node DC after influenza virus infection

Eur J Immunol. 2008 Dec;38(12):3304-15. doi: 10.1002/eji.200838602.

Abstract

Pulmonary influenza infection causes prolonged lymph node hypertrophy while processed viral antigens continue to be presented to virus-specific CD8 T cells. We show that naïve, but not central/memory, nucleoprotein (NP)-specific CD8 T cells recognized antigen-bearing CD11b(+) DC in the draining lymph nodes more than 30 days after infection. After these late transfers, the naïve CD8 T cells underwent an abortive proliferative response in the mediastinal lymph node (MLN), where large clusters of partially activated cells remained in the paracortex until at least a week after transfer. A majority of the endogenous NP-specific CD8 T cells that were in the MLN between 30 and 50 days after infection also showed signs of a continuing response to antigen stimulation. A high frequency of endogenous NP-specific CD8 T cells in the MLN indicates that late antigen presentation may help shape the epitope dominance hierarchy during reinfection.

Publication types

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

MeSH terms

  • Animals
  • Antigen Presentation / immunology*
  • Antigen-Presenting Cells / immunology
  • CD11b Antigen / immunology
  • CD8-Positive T-Lymphocytes / immunology*
  • Cell Line
  • Cell Separation
  • Dendritic Cells / immunology*
  • Immunity, Innate / immunology*
  • Immunologic Memory / immunology*
  • Lymph Nodes / immunology*
  • Mice
  • Mice, Inbred C57BL
  • Nucleoproteins / immunology
  • Orthomyxoviridae Infections / immunology*
  • Phenotype
  • Time Factors

Substances

  • CD11b Antigen
  • Nucleoproteins