MARCH1-mediated MHCII ubiquitination promotes dendritic cell selection of natural regulatory T cells.
MARCH1-mediated MHCII ubiquitination promotes dendritic cell selection of natural regulatory T cells.
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DOI:
10.1084/jem.20122695
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发表时间:
2013-06-03
期刊:
影响因子:
--
通讯作者:
Shin JS
中科院分区:
文献类型:
--
作者:
Oh J;Wu N;Baravalle G;Cohn B;Ma J;Lo B;Mellman I;Ishido S;Anderson M;Shin JS
Ubiquitination of MHCII molecules on dendritic cells is essential for the development of natural regulatory T cells Membrane-associated RING-CH1 (MARCH1) is an E3 ubiquitin ligase that mediates ubiquitination of MHCII in dendritic cells (DCs). MARCH1-mediated MHCII ubiquitination in DCs is known to regulate MHCII surface expression, thereby controlling DC-mediated T cell activation in vitro. However, its role at steady state or in vivo is not clearly understood. Here, we show that MARCH1 deficiency resulted in a substantial reduction in the number of thymus-derived regulatory T cells (T reg cells) in mice. A specific ablation of MHCII ubiquitination also significantly reduced the number of thymic T reg cells. Indeed, DCs deficient in MARCH1 or MHCII ubiquitination both failed to generate antigen-specific T reg cells in vivo and in vitro, although both exhibited an increased capacity for antigen presentation in parallel with the increased surface MHCII. Thus, MARCH1-mediated MHCII ubiquitination in DCs is required for proper production of naturally occurring T reg cells, suggesting a role in balancing immunogenic and regulatory T cell development.
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