Inhibitor of DNA binding 3 limits development of murine slam-associated adaptor protein-dependent "innate" gammadelta T cells.

Inhibitor of DNA binding 3 limits development of murine slam-associated adaptor protein-dependent "innate" gammadelta T cells.
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DOI:
10.1371/journal.pone.0009303
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发表时间:
2010-02-19
期刊:
影响因子:
3.7
通讯作者:
Kee BL
Kee BL
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Verykokakis M;Boos MD;Bendelac A;Adams EJ;Pereira P;Kee BL

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Id3 是 E 蛋白转录因子活性的主要拮抗剂,该活性由 αβ 和 γδ T 细胞受体 (TCR) 发出的信号诱导。此前研究表明,缺乏 Id3 的小鼠在 TCRαβ+ T 淋巴细胞的阳性和阴性选择方面存在细微缺陷。最近,C57BL/6 背景下的 Id3 −/− 小鼠显示 γδ T 细胞显着扩增。在这里,我们报告缺乏 Id3 的小鼠胸腺细胞数量减少,但表达 Vγ1.1+Vδ6.3+ 受体且连接多样性有限的 γδ T 细胞产量增加。这些 Vγ1.1+Vδ6.3+ T 细胞具有与“先天”淋巴细胞(例如自然杀伤 T (NKT) 细胞)相关的多种特征,包括激活的表型、转录因子 PLZF 的表达以及 IFNg 和 IL-4 的快速产生。此外,与其他“先天”淋巴细胞群一样,Id3 −/− Vγ1.1+Vδ6.3+ T 细胞的发育需要信号传导接头蛋白 SAP。我们的数据提供了对 Vγ1.1+Vδ6.3+ T 细胞发育要求的新见解,并表明 Id3 在抑制“先天”γδ T 细胞对 SAP 介导的扩增或存活的反应中的作用。
Id3 is a dominant antagonist of E protein transcription factor activity that is induced by signals emanating from the αβ and γδ T cell receptor (TCR). Mice lacking Id3 were previously shown to have subtle defects in positive and negative selection of TCRαβ+ T lymphocytes. More recently, Id3 −/− mice on a C57BL/6 background were shown to have a dramatic expansion of γδ T cells. Here we report that mice lacking Id3 have reduced thymocyte numbers but increased production of γδ T cells that express a Vγ1.1+Vδ6.3+ receptor with restricted junctional diversity. These Vγ1.1+Vδ6.3+ T cells have multiple characteristics associated with “innate” lymphocytes such as natural killer T (NKT) cells including an activated phenotype, expression of the transcription factor PLZF, and rapid production of IFNg and interleukin-4. Moreover, like other “innate” lymphocyte populations, development of Id3 −/− Vγ1.1+Vδ6.3+ T cells requires the signaling adapter protein SAP. Our data provide novel insight into the requirements for development of Vγ1.1+Vδ6.3+ T cells and indicate a role for Id3 in repressing the response of “innate” γδ T cells to SAP-mediated expansion or survival.
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