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- W2109346543 abstract "Abstract Using plasmid vaccination with DNA encoding the putative phosphate transport receptor PstS-3 from Mycobacterium tuberculosis and 36 overlapping 20-mer peptides spanning the entire PstS-3 sequence, we determined the immunodominant Th1-type CD4+ T cell epitopes in C57BL/10 mice, as measured by spleen cell IL-2 and IFN-γ production. Furthermore, a potent IFN-γ-inducing, Db-restricted CD8+ epitope was identified using MHC class I mutant B6.C-H-2bm13 mice and intracellular IFN-γ and whole blood CD8+ T cell tetramer staining. Using adoptive transfer of CFSE-labeled, peptide-pulsed syngeneic spleen cells from naive animals into DNA vaccinated or M. tuberculosis-infected recipients, we demonstrated a functional in vivo CTL activity against this Db-restricted PstS-3 epitope. IFN-γ ELISPOT responses to this epitope were also detected in tuberculosis-infected mice. The CD4+ and CD8+ T cell epitopes defined for PstS-3 were completely specific and not recognized in mice vaccinated with either PstS-1 or PstS-2 DNA. The H-2 haplotype exerted a strong influence on immune reactivity to the PstS-3 Ag, and mice of the H-2b, p, and f haplotype produced significant Ab and Th1-type cytokine levels, whereas mice of H-2d, k, r, s, and q haplotype were completely unreactive. Low responsiveness against PstS-3 in MHC class II mutant B6.C-H-2bm12 mice could be overcome by DNA vaccination. IFN-γ-producing CD8+ T cells could also be detected against the Db-restricted epitope in H-2p haplotype mice. These results highlight the potential of DNA vaccination for the induction and characterization of CD4+ and particularly CD8+ T cell responses against mycobacterial Ags." @default.
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- W2109346543 date "2004-06-01" @default.
- W2109346543 modified "2023-10-03" @default.
- W2109346543 title "Induction of In Vivo Functional Db-Restricted Cytolytic T Cell Activity against a Putative Phosphate Transport Receptor of <i>Mycobacterium tuberculosis</i>" @default.
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- W2109346543 doi "https://doi.org/10.4049/jimmunol.172.11.6913" @default.
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