Quantitative analysis of long-term virus-specific CD8+-T-cell memory in mice challenged with unrelated pathogens

Haiyan Liu, Samita Andreansky, Gabriela Diaz, Stephen J. Turner, Dominik Wodarz, Peter C. Doherty

Research output: Contribution to journalArticle

25 Scopus citations

Abstract

The consequences for the long-term maintenance of virus-specific CD8+-T-cell memory have been analyzed experimentally for sequential respiratory infections with readily eliminated (influenza virus) and persistent (gammaherpesvirus 68 [γHV681]) pathogens. Sampling a broad range of tissue sites established that the numbers of CD8+ T cells specific for the prominent influenza virus DbNP366 epitope were reduced by about half in mice that had been challenged 100 days previously with γHV68, though the prior presence of a large CD8+ DbNP366+ population caused no selective defect in the γHV68-specific CD8+ Kbp79+ response. Conversely, mice that had been primed and boosted to generate substantial γHV68-specific CD8+ Dbp56+ populations did not show any decrease in prevalence for this set of CD8+ memory cytotoxic T lymphocytes (CTL) at 200 days after respiratory exposure to an influenza A virus. However, in both experiments, the total magnitude of the CD8+-T-cell pool was significantly diminished in those that had been infected with γHV68 and the influenza A virus. The broader implications of these findings, especially under conditions of repeated exposure to unrelated pathogens, are explored with a mathematical model which emphasizes that the immune effector and memory "phenome" is a function of the overall infection experience of the individual.

Original languageEnglish (US)
Pages (from-to)7756-7763
Number of pages8
JournalJournal of virology
Volume77
Issue number14
DOIs
StatePublished - Jul 1 2003

    Fingerprint

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

Cite this