T-bet, a Th1 transcription factor regulates the expression of Tim-3.

T-bet, a Th1 transcription factor regulates the expression of Tim-3.
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DOI:
10.1002/eji.200939842
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发表时间:
2010-03
影响因子:
5.4
通讯作者:
Kuchroo, Vijay K.
Kuchroo, Vijay K.
中科院分区:
医学3区
文献类型:
--
作者:
Anderson, Ana C.;Lord, Graham M.;Dardalhon, Valerie;Lee, David H.;Sabatos-Peyton, Catherine A.;Glimcher, Laurie H.;Kuchroo, Vijay K.

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Tim - 3(T细胞免疫球蛋白,黏蛋白结构域)- 3是一种膜蛋白,在分泌干扰素 - γ的CD4⁺辅助性T细胞1型(Th1)细胞分化的后期表达,并且在树突状细胞(DCs)上组成性表达。Tim - 3在Th1细胞上的连接会终止Th1免疫反应。此外,Tim - 3在耐受诱导中起作用,尽管其实现的机制尚未阐明。虽然很明显Tim - 3在免疫系统中起重要作用,但对于调节Tim - 3表达的分子途径知之甚少。在此我们研究了与Th1相关的转录因子在调节Tim - 3表达中的作用。我们的实验表明,Tim - 3的表达受Th1特异性转录因子T - bet的调节。这为Th1反应的产生引入了一种新的范例,即负责效应Th1细胞分化的转录因子也会增加一种特定的反向调节分子的表达,以确保促炎性Th1免疫反应的适当终止。
Tim-3 (T cell immunoglobulin, mucin domain)-3 is a membrane protein expressed at late stages of interferon-gamma secreting CD4+ T helper type 1 (Th1) cell differentiation and constitutively on dendritic cells (DCs). Ligation of Tim-3 on Th1 cells terminates Th1 immune responses. In addition, Tim-3 plays a role in tolerance induction, though the mechanism by which this is accomplished has yet to be elucidated. While it is clear that Tim-3 plays an important role in the immune system, little is known regarding the molecular pathways that regulate Tim-3 expression. Here we have examined the role of Th1-associated transcription factors in regulating Tim-3 expression. Our experiments reveal that Tim-3 expression is regulated by the Th1-specific transcription factor T-bet. This introduces a novel paradigm into the generation of a Th1 response, whereby a transcription factor responsible for effector Th1 cell differentiation also increases the expression of a specific counter-regulatory molecule to ensure appropriate termination of pro-inflammatory Th1 immune responses.
DOI: 10.1084/jem.20060210
发表时间: 2006-06-12
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影响因子: --
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