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The Journal of Immunology, Vol 144, Issue 1 122-128, Copyright © 1990 by American Association of Immunologists
ARTICLES |
MD Miller, CI Lord, V Stallard, GP Mazzara and NL Letvin
Harvard Medical School, New England Regional Primate Research Center, Southborough, MA 01772.
The simian immunodeficiency virus of macaques (SIVmac) is a lentivirus which induces an AIDS-like disease in rhesus monkeys. We have explored the virus-specific cellular immune response in SIVmac-infected rhesus monkeys. Con A-activated, IL-2 expanded PBL of some SIVmac-infected rhesus monkeys lyse autologous B lymphoblastoid cell lines infected with a recombinant vaccinia virus that carries the SIVmac gag gene. This lysis is mediated by CD8+ lymphocytes and is MHC class I restricted. Moreover, these effector lymphocytes do not express the NK cell-associated molecules NKH1 or CD16. These cells are, therefore, CTL. In a limited prospective study of SIVmac-infected rhesus monkeys, the presence of the SIVmac gag-specific CTL activity in PBL correlated with both a reduced efficiency in isolating SIVmac from PBL of these monkeys and their extended survival. This method for assessing SIVmac gag-specific cellular immunity in rhesus monkeys will be important not only in investigating the immunopathogenesis of SIVmac-induced disease, but also in evaluating the capacity of candidate AIDS vaccines to elicit a cell-mediated immune response in this animal model.
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