Small intestine lamina propria dendritic cells promote de novo generation of Foxp3 T reg cells via retinoic acid.
Small intestine lamina propria dendritic cells promote de novo generation of Foxp3 T reg cells via retinoic acid.
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DOI:
10.1084/jem.20070602
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发表时间:
2007-08-06
期刊:
影响因子:
--
通讯作者:
Belkaid Y
中科院分区:
文献类型:
--
作者:
Sun CM;Hall JA;Blank RB;Bouladoux N;Oukka M;Mora JR;Belkaid Y
To maintain immune homeostasis, the intestinal immune system has evolved redundant regulatory strategies. In this regard, the gut is home to a large number of regulatory T (T reg) cells, including the Foxp3+ T reg cell. Therefore, we hypothesized that the gut environment preferentially supports extrathymic T reg cell development. We show that peripheral conversion of CD4+ T cells to T reg cells occurs primarily in gut-associated lymphoid tissue (GALT) after oral exposure to antigen and in a lymphopenic environment. Dendritic cells (DCs) purified from the lamina propria (Lp; LpDCs) of the small intestine were found to promote a high level of T reg cell conversion relative to lymphoid organ–derived DCs. This enhanced conversion by LpDCs was dependent on TGF-β and retinoic acid (RA), which is a vitamin A metabolite highly expressed in GALT. Together, these data demonstrate that the intestinal immune system has evolved a self-contained strategy to promote T reg cell neoconversion.
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