Enrichment and persistence of virus-specific CTL in the brain of simian immunodeficiency virus-infected monkeys is associated with a unique cytokine environment.
J Immunol
; 178(9): 5812-9, 2007 May 01.
Article
in En
| MEDLINE
| ID: mdl-17442965
ABSTRACT
The host reaction to infection of the brain contributes to a number of CNS pathologies including neuro-AIDS. In this study, we have identified the accumulation of SIV-specific CTL in the brains of SIV-infected animals who have neurophysiological abnormalities but are otherwise asymptomatic. SIV-specific CTL enter the brain early after viral infection and are maintained in the brain even when those reactive with an immunodominant epitope in Tat are lost from the rest of the body. The specialized CNS environment contributes to this unique outcome. Following SIV infection, brain levels of IL-15 were significantly elevated whereas IL-2 was absent, creating an environment that favors CTL persistence. Furthermore, in response to IL-15, brain-derived CD8(+) T cells could expand in greater numbers than those from spleen. The accumulation, persistence, and maintenance of CTL in the brain are closely linked to the increased levels of IL-15 in the absence of IL-2 in the CNS following SIV infection.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Brain
/
T-Lymphocytes, Cytotoxic
/
Simian Acquired Immunodeficiency Syndrome
/
Simian Immunodeficiency Virus
/
Interleukin-15
Type of study:
Risk_factors_studies
Limits:
Animals
Language:
En
Journal:
J Immunol
Year:
2007
Type:
Article
Affiliation country:
United States