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- W1960393385 abstract "Tolerance induction by dendritic cells (DCs) is, in part, mediated by the activation of regulatory T cells (Tregs). We have previously shown in vitro that human DCs treated with glucocorticoids (GCs), IL-10, or TGF-β upregulate the GC-Induced Leucine Zipper protein (GILZ). GILZ overexpression promotes DC differentiation into regulatory cells that generate IL-10-producing Ag-specific Tregs. To investigate whether these observations extend in vivo, we have generated CD11c-GILZ(hi) transgenic mice. DCs from these mice constitutively overexpress GILZ to levels observed in GC-treated wild-type DCs. In this article, we establish that GILZ(hi) DCs display an accumulation of Foxp3(+) Tregs in the spleens of young CD11c-GILZ(hi) mice. In addition, we show that GILZ(hi) DCs strongly increase the Treg pool in central and peripheral lymphoid organs of aged animals. Upon adoptive transfer to wild-type recipient mice, OVA-loaded GILZ(hi) bone marrow-derived DCs induce a reduced activation and proliferation of OVA-specific T cells as compared with control bone marrow-derived DCs, associated with an expansion of thymus-derived CD25(+)Foxp3(+) CD4 T cells. Transferred OVA-loaded GILZ(hi) DCs produce significantly higher levels of IL-10 and express reduced levels of MHC class II molecules as compared with OVA-loaded control DCs, emphasizing the regulatory phenotype of GILZ(hi) DCs in vivo. Thus, our work demonstrates in vivo that the GILZ overexpression alone is sufficient to promote a tolerogenic mode of function in DCs." @default.
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- W1960393385 date "2014-12-15" @default.
- W1960393385 modified "2023-10-13" @default.
- W1960393385 title "Glucocorticoid-Induced Leucine Zipper Enhanced Expression in Dendritic Cells Is Sufficient To Drive Regulatory T Cells Expansion In Vivo" @default.
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- W1960393385 doi "https://doi.org/10.4049/jimmunol.1400758" @default.
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