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- W1984080775 abstract "BALB/c mice resolve Leishmania donovani infection in the liver over an 8-12-week period. However, after an initial phase of 2-4 weeks where increases in parasite load are not readily detectable, parasite numbers in the spleen begin to increase reaching maximum levels at 16 weeks post-infection. Thereafter, parasite replication in the spleen is controlled and BALB/c mice maintain this residual parasite load in the spleen for many months, without further increase. We evaluated functions of CD11C+ splenic dendritic cells throughout the course of L. donovani infection in the spleen of BALB/c mice. Unlike the dendritic cell (DC)-specific antigen DEC-205, CD11C was not up-regulated on macrophages during visceral leishmaniasis. No appreciable impairment of splenic DC functions was observed when this antigen-presenting cell subset was purified from 30-day post-infected mice. Significant impairment in inducing allogeneic mixed lymphocyte reaction (MLR) and presenting L. donovani antigens or keyhole limpet haemocyanin (KLH) to specific T cells was observed with CD11C+ splenic DC purified from 60-day post-infected mice. Functional impairment of splenic DC at 60 days post-infection correlated with their reduced surface expression of major histocompatibility complex (MHC) class II molecules, impairment of interleukin-12 (IL-12) production and to their ability to suppress interferon-gamma (IFN-gamma) production by Leishmania antigen-primed T cells. Of interest, the impairment of splenic DC in presenting Leishmania antigens or KLH to specific T cells was corrected at 120 days post-infection, and correlated with their up-regulation of MHC class II expression, IL-12 production, induction of IFN-gamma by Leishmania antigen-primed T cells and the onset of control over splenic parasite replication in vivo. These results indicate that functional integrity of DC may be important in controlling L. donovani infection." @default.
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- W1984080775 date "2000-02-01" @default.
- W1984080775 modified "2023-09-23" @default.
- W1984080775 title "Modulation of CD11C<sup>+</sup>splenic dendritic cell functions in murine visceral leishmaniasis: correlation with parasite replication in the spleen" @default.
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- W1984080775 doi "https://doi.org/10.1046/j.1365-2567.2000.00939.x" @default.
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