| Literature DB >> 22773728 |
Qin Lan1, Xiaohui Zhou, Huimin Fan, Maogen Chen, Julie Wang, Bernhard Ryffel, David Brand, Rajalakshmy Ramalingam, Pawel R Kiela, David A Horwitz, Zhongmin Liu, Song Guo Zheng.
Abstract
Interplay between Foxp3(+) regulatory T cells (Treg) and dendritic cells (DCs) maintains immunologic tolerance, but the effects of each cell on the other are not well understood. We report that polyclonal CD4(+)Foxp3(+) Treg cells induced ex vivo with transforming growth factor beta (TGFβ) (iTreg) suppress a lupus-like chronic graft-versus-host disease by preventing the expansion of immunogenic DCs and inducing protective DCs that generate additional recipient CD4(+)Foxp3(+) cells. The protective effects of the transferred iTreg cells required both interleukin (IL)-10 and TGFβ, but the tolerogenic effects of the iTreg on DCs, and the immunosuppressive effects of these DCs were exclusively TGFβ-dependent. The iTreg were unable to tolerize Tgfbr2-deficient DCs. These results support the essential role of DCs in 'infectious tolerance' and emphasize the central role of TGFβ in protective iTreg/DC interactions in vivo.Entities:
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Year: 2012 PMID: 22773728 PMCID: PMC3523557 DOI: 10.1093/jmcb/mjs040
Source DB: PubMed Journal: J Mol Cell Biol ISSN: 1759-4685 Impact factor: 6.216