id author title date pages extension mime words sentences flesch summary cache txt cord-266018-8bhnlsgy Trifilo, Matthew J. The CC chemokine ligand 3 regulates CD11c(+)CD11b(+)CD8α(−) dendritic cell maturation and activation following viral infection of the central nervous system: implications for a role in T cell activation 2004-09-15 .txt text/plain 5101 272 60 The major findings of this study are (i) MHV infection of the CNS results in the appearance of two distinct populations of CD11c + cells each expressing markers characteristic of lymphoid (CD11c + CD11b À CD8a + DEC205 + ) and myeloid dendritic cells (CD11c + CD11b + CD8a À DEC205 À ), (ii) the accumulation of CD8a À DCs within the draining CLN is reduced in the absence of CCL3 signaling, (iii) expression of co-stimulatory molecules such as CD40 by CD8a À DCs within either the brain and CLN of MHV-infected CCL3 À/À mice is diminished suggesting that CCL3 signaling enhances expression of these molecules, and (iv) absence of CCL3 signaling results in the re-direction of the T cell response to viral antigens as determined by cytokine production. Our studies clearly indicate that CD8a À DCs isolated from the draining CLN of MHV-infected CCL3 +/+ mice secrete IL-12 suggesting that these cells help influence a protective Th1-mediated immune response characterized by the majority of antigen-specific T cells expressing IFN-g rather than IL-10 (Table 1 ). ./cache/cord-266018-8bhnlsgy.txt ./txt/cord-266018-8bhnlsgy.txt