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- W1869330944 abstract "Understanding the factors contributing to the generation of immune memory is important for rational vaccine design. In this study, we addressed the individual and combined roles of Ag and inflammation in sustaining the ability of primed CD8 T cells to clonally expand and differentiate into memory cells. We transferred CD8 T cells that were primed for a brief period into naive mice, mice infected with a pathogen not carrying the specific Ag (inflammation only), mice infected with a pathogen carrying the donor cell-specific Ag (inflammation plus Ag), or into mice exposed to soluble Ag (Ag only). We found that the donor CD8 T cells continued to proliferate in all the four conditions, but their ability to clonally expand and differentiate into memory cells was approximately 1000-fold higher when transferred into mice acutely infected with pathogen carrying the relevant Ag. Memory cells generated under conditions of sustained exposure to inflammation and Ag during the priming phase were superior in their ability to elicit recall responses on a per cell basis. Thus, simultaneous and sustained exposure of donor CD8 T cells to inflammatory and antigenic stimuli, following the initial priming phase, leads to the greatest expansion of CD8 T cells at the peak of the immune response and induces an optimal memory differentiation program. These results suggest that vaccination strategies should attempt to provide sustained exposure to Ag plus inflammation but not either alone following the initial priming." @default.
- W1869330944 created "2016-06-24" @default.
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- W1869330944 date "2008-01-15" @default.
- W1869330944 modified "2023-10-13" @default.
- W1869330944 title "CD8 T Cell Expansion and Memory Differentiation Are Facilitated by Simultaneous and Sustained Exposure to Antigenic and Inflammatory Milieu" @default.
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- W1869330944 doi "https://doi.org/10.4049/jimmunol.180.2.1131" @default.
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