Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6139854 | Virology | 2014 | 11 Pages |
Abstract
The lung-derived dendritic cell (LDC) recruitment following intranasal (i.n.) vaccination of different poxviral vector-based vaccines/adjuvants were evaluated to decipher how these factors influenced CD8+ T cell avidity. Compared to the standard i.n. recombinant fowlpox virus (FPV)-HIV vaccination, the FPV-HIV IL-13Rα2 or IL-4Rα antagonist adjuvanted vaccines that induced higher avidity CD8+ T cells, also recruited significantly elevated MHCII+ CD11c+ CD11b+ CD103â CD64â MAR-1â conventional DC (cDCs) to the lung mucosae (hierarchy: IL-4R antagonist>IL-13Rα2>unadjuvanted). In contrast, elevated CD11bâ CD103+ LDCs were detected in animals that received recombinant HIV vaccinia virus (rVV) or Modified Vaccinia Ankara virus (MVA) vector-based vaccines. Adoptive transfer studies indicated that CD11bâ CD103+ LDCs significantly dampened HIV-specific CD8+ T cell avidity compared to CD11b+ CD103â LDCs. Collectively; our observations revealed that rFPV vector prime and transient inhibition of IL-4/IL-13 at the vaccination site favoured the recruitment of unique LDCs, associated with the induction of high quality immunity.
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Authors
Shubhanshi Trivedi, Ronald J. Jackson, Charani Ranasinghe,