| First Author | Gottfried-Blackmore A | Year | 2009 |
| Journal | Proc Natl Acad Sci U S A | Volume | 106 |
| Issue | 49 | Pages | 20918-23 |
| PubMed ID | 19906988 | Mgi Jnum | J:155303 |
| Mgi Id | MGI:4413486 | Doi | 10.1073/pnas.0911509106 |
| Citation | Gottfried-Blackmore A, et al. (2009) Acute in vivo exposure to interferon-gamma enables resident brain dendritic cells to become effective antigen presenting cells. Proc Natl Acad Sci U S A 106(49):20918-23 |
| abstractText | Dendritic cells (DC) are the professional antigen presenting cells (APC) that bridge the innate and adaptive immune system. Previously, in a CD11c/EYFP transgenic mouse developed to study DC functions, we anatomically mapped and phenotypically characterized a discrete population of EYFP(+) cells within the microglia that we termed brain dendritic cells (bDC). In this study, we advanced our knowledge of the function of these cells in the CD11c/EYFP transgenic mouse and its chimeras, using acute stimuli of stereotaxically inoculated IFNgamma or IL-4 into the CNS. The administration of IFNgamma increased the number of EYFP(+)bDC but did not recruit peripheral DC into the CNS. IFNgamma, but not IL-4, upregulated the expression levels of major histocompatibility class II (MHC-II). In addition, IFNgamma-activated EYFP(+)bDC induced antigen-specific naive CD4 T cells to proliferate and secrete Th1/Th17 cytokines. Activated bDC were also able to stimulate naive CD8 T cells. Collectively, these data reveal the Th1 cytokine IFNgamma, but not the Th2 cytokine IL4, induces bDC to up-regulate MHC-II and become competent APC. |
