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Cytotoxic T lymphocyte (CTL) senescence may be an important mechanism of immune failure in HIV-1 infection. We find that senescence of HIV-1-specific CTL clones causes loss of killing activity, preventable by transduction with telomerase. Furthermore, senescence is associated with reduced expression of the effector molecules granzyme and perforin, suggesting CTL “exhaustion” can result in hypofunction...
The ability to study HIV-1-specific cytotoxic T cell (CTL) clones in models in vitro or to expand them for immunotherapeutic use is limited by the technical difficulty of propagating these cells. The factors that determine the survival and proliferation of the cells are incompletely understood and could include cytokines provided from feeder cells or serum. We therefore investigated the effects of...
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