Contrasting roles for all-trans retinoic acid in TGF-beta-mediated induction of Foxp3 and Il10 genes in developing regulatory T cells.

Contrasting roles for all-trans retinoic acid in TGF-beta-mediated induction of Foxp3 and Il10 genes in developing regulatory T cells.
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全反式视黄酸在 TGF-β 介导的 Foxp3 和 Il10 基因在发育调节性 T 细胞中的诱导中的对比作用。

DOI:
10.1084/jem.20080950
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发表时间:
2009-02-16
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
Weaver CT
Weaver CT
中科院分区:
其他
文献类型:
--
作者:
Maynard CL;Hatton RD;Helms WS;Oliver JR;Stephensen CB;Weaver CT

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胸腺外诱导调节性 T (T reg) 细胞对于调节外周效应 T 细胞反应至关重要。除了 Foxp3 之外,T reg 细胞表达的抑制性细胞因子(例如 IL-10)对于外周耐受至关重要,特别是在肠道中。 TGF-β 已被证明可诱导 Foxp3 以及 IL10 和维生素 A 代谢物的表达;研究发现全反式视黄酸(RA [at-RA])可以增强前者。我们报告说,与增强 TGF-β 介导的 Foxp3 诱导相反,at-RA 有效抑制初始 CD4 T 细胞中 TGF-β 介导的 Il10 诱导。因此,作为 at-RA 活跃产生者的粘膜 DC 亚群抑制初始 CD4 T 细胞中 Il10 的诱导,同时促进 Foxp3 的诱导。因此,维生素 A 缺乏的小鼠的 IL-10 活性 T reg 细胞数量增加。 DC 被某些 Toll 样受体 (TLR)(特别是 TLR9)激活,可抑制 T 细胞诱导 Foxp3 并诱导 IL10。总的来说,我们的数据表明,at-RA 对发育中的 CD4+ T reg 细胞中 Foxp3 和 Il10 的诱导具有相互影响,并表明抗原呈递细胞对 at-RA 产生的 TLR9 依赖性抑制可能代表了促进表达 IL-10 的 T 细胞发育的一种机制。
Extrathymic induction of regulatory T (T reg) cells is essential to the regulation of effector T cell responses in the periphery. In addition to Foxp3, T reg cell expression of suppressive cytokines, such as IL-10, is essential for peripheral tolerance, particularly in the intestines. TGF-β has been shown to induce expression of Foxp3 as well as IL10 and the vitamin A metabolite; all-trans retinoic acid (RA [at-RA]) has been found to enhance the former. We report that in contrast to its enhancement of TGF-β–mediated Foxp3 induction, at-RA potently inhibits the TGF-β–mediated induction of Il10 in naive CD4 T cells. Thus, mucosal DC subsets that are active producers of at-RA inhibit induction of Il10 in naive CD4 T cells while promoting induction of Foxp3. Accordingly, mice with vitamin A deficiency have increased numbers of IL-10–competent T reg cells. Activation of DCs by certain Toll-like receptors (TLRs), particularly TLR9, suppresses T cell induction of Foxp3 and enables induction of Il10. Collectively, our data indicate that at-RA has reciprocal effects on the induction of Foxp3 and Il10 in developing CD4+ T reg cells and suggest that TLR9-dependent inhibition of at-RA production by antigen-presenting cells might represent one mechanism to promote the development of IL-10–expressing T cells.
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