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- W2020167947 abstract "Cytotoxic T lymphocytes (CTLs) are capable of conferring protection against intracellular pathogens and tumor. Protective antiviral immunity, mediated by the activation of antigenic epitope-specific CTL, can be achieved by delivering exogenous antigen into the cytosol of antigen-presenting cells. Cytosolic introduction of vaccine antigen, however, requires a specialized delivery strategy due to the membrane barrier limiting the access of macromolecules to the cytosol. In this study, we have investigated the potential ability of listeriolysin O-containing liposomes (LLO-liposomes) to deliver lymphocytic choriomeningitis virus (LCMV) nucleoprotein (NP), harnessing the intracellular invasion mechanism of Listeria monocytogenes, to stimulate a NP-specific CTL response. We have analyzed the ability of LLO-liposomes to induce an enhanced CTL response and determined the extent of CTL-mediated protection using an in vivo infection model. Mice immunized with LLO-liposomes containing NP generated a higher frequency of NP-specific CD8+ T cells with greater effector activity than the control groups immunized with either non-LLO-liposomal NP or LLO-liposomes containing control protein. Moreover, LLO-liposomal NP-immunized mice were completely protected against a lethal intracerebral challenge with a virulent strain of LCMV and were capable of clearing a chronic LCMV infection. Our study demonstrates that LLO-liposomes can be used as an efficient vaccine delivery system carrying a viral antigenic protein to generate protective antiviral immunity." @default.
- W2020167947 created "2016-06-24" @default.
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- W2020167947 date "2003-12-09" @default.
- W2020167947 modified "2023-09-26" @default.
- W2020167947 title "Cytosolic Delivery of Viral Nucleoprotein by Listeriolysin O-Liposome Induces Enhanced Specific Cytotoxic T Lymphocyte Response and Protective Immunity" @default.
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- W2020167947 doi "https://doi.org/10.1021/mp034021m" @default.
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