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CD8+ cytotoxic T lymphocyte responses to lentiviruses and herpesviruses

D H Barouch1, N L Letvin

  • 1Harvard Medical School and Beth Israel Deaconess Medical Center, Research East 113, 330 Brookline Avenue, Boston, MA 02215, USA. dan_barouch@hotmail.com

Current Opinion in Immunology
|August 11, 2001
PubMed

Insights

New technologies reveal that CD8+ cytotoxic T lymphocytes (CTLs) are crucial for controlling persistent viral infections. These immune cells show significant expansion during initial infection and remain highly active during chronic stages.

Area of Science:

  • Immunology
  • Virology
  • Infectious Diseases

Background:

  • Persistent viral infections pose significant challenges to immune containment.
  • Evaluating the role of CD8+ cytotoxic T lymphocytes (CTLs) in viral control has been limited by technological constraints.

Purpose of the Study:

  • To investigate the role of CD8+ CTLs in the immune containment of persistent viral infections.
  • To leverage recent technological advancements for a deeper understanding of CTL function in chronic viral infections.

Main Methods:

  • Utilized tetramer, ELISPOT, and cytokine-production assays.
  • Studied CD8+ CTL responses in lentivirus and herpesvirus infections.
  • Included human and nonhuman primate models.

Main Results:

  • Demonstrated dramatic expansions of virus-specific CD8+ CTLs during primary infection.
  • Observed the maintenance of unexpectedly high levels of virus-specific CD8+ CTLs in chronic infection.
  • Provided evidence for the significant role of CTLs in controlling persistent viruses.

Conclusions:

  • CD8+ CTLs play a critical role in the immune control of persistent viral infections.
  • Recent technological advancements have enabled a clearer understanding of CTL-mediated viral control.
  • High levels of virus-specific CTLs are maintained even in chronic infection, highlighting their importance.

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