PMID- 9584136 OWN - NLM STAT- MEDLINE DCOM- 19980609 LR - 20190508 IS - 0022-1007 (Print) IS - 1540-9538 (Electronic) IS - 0022-1007 (Linking) VI - 187 IP - 10 DP - 1998 May 18 TI - Long-term persistence of activated cytotoxic T lymphocytes after viral infection of the central nervous system. PG - 1575-82 AB - Mice intranasally inoculated with influenza A/X-31 are protected against a subsequent intracerebral challenge with the neurovirulent influenza A/WSN and this heterotypic protection is mediated by CD8(+) cytotoxic T lymphocytes. We have studied the kinetics of this secondary immune response and found that despite the elimination of replication-competent virus by day 10, we were able to recover activated influenza-specific cytotoxic T lymphocytes (CTLs) that killed freshly ex vivo from the brains of mice for at least 320 d after the intracerebral inoculation. The activated antiviral CTLs expressed high levels of the early activation marker CD69, suggesting continuing TCR signaling despite a lack of viral protein and major histocompatibility complex staining by immunohistochemistry in the brain parenchyma and barely detectable levels of viral nucleic acid by single and two-step reverse transcription PCR. Local persistence of activated lymphocytes may be important for efficient long-term responses to viruses prone to recrudesce in sites of relative immune privilege. FAU - Hawke, S AU - Hawke S AD - Nuffield Department of Medicine, University of Oxford, John Radcliffe Hospital, Headington, Oxford OX3 9DU, United Kingdom. s.hawke@cxwms.ac.uk FAU - Stevenson, P G AU - Stevenson PG FAU - Freeman, S AU - Freeman S FAU - Bangham, C R AU - Bangham CR LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Exp Med JT - The Journal of experimental medicine JID - 2985109R SB - IM MH - Animals MH - CD8-Positive T-Lymphocytes/*immunology MH - Central Nervous System/*immunology/virology MH - *Cytotoxicity, Immunologic MH - *Lymphocyte Activation MH - Mice MH - Mice, Inbred C57BL MH - *Orthomyxoviridae MH - Orthomyxoviridae Infections/*immunology MH - Time Factors PMC - PMC2212297 EDAT- 1998/06/13 00:00 MHDA- 1998/06/13 00:01 PMCR- 1998/11/18 CRDT- 1998/06/13 00:00 PHST- 1998/06/13 00:00 [pubmed] PHST- 1998/06/13 00:01 [medline] PHST- 1998/06/13 00:00 [entrez] PHST- 1998/11/18 00:00 [pmc-release] AID - 10.1084/jem.187.10.1575 [doi] PST - ppublish SO - J Exp Med. 1998 May 18;187(10):1575-82. doi: 10.1084/jem.187.10.1575.