The differentiation of ROR-γt expressing iNKT17 cells is orchestrated by Runx1.

The differentiation of ROR-γt expressing iNKT17 cells is orchestrated by Runx1.
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DOI:
10.1038/s41598-017-07365-8
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发表时间:
2017-08-01
期刊:
影响因子:
4.6
通讯作者:
Shapiro VS
Shapiro VS
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Thapa P;Manso B;Chung JY;Romera Arocha S;Xue HH;Angelo DBS;Shapiro VS

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iNKT细胞是识别由CD 1d呈递的糖脂的T细胞的独特谱系。在胸腺中,它们分化为iNKT 1、iNKT 2和iNKT 17效应子亚群,其特征是Tbet、Gata 3和ROR-γt的优先表达以及IFN-γ、IL-4和IL-17的产生。我们证明了转录调节因子Runx 1对于表达ROR-γt的iNKT 17细胞的产生是必需的。PLZF-cre Runx 1 cKO小鼠在胸腺、脾脏和肝脏中缺乏iNKT 17细胞。Runx 1缺陷型iNKT细胞改变了对iNKT 17分化重要的几个基因的表达,包括IL-7 R α、BATF和c-Maf的表达降低以及Bcl 11b和Lef 1的表达增加。然而,Lef 1表达的降低或IL-7 R α转基因的引入不足以纠正iNKT 17分化中的缺陷,这表明Runx 1是iNKT 17分化所需的几个基因的关键调节因子。Runx 1的缺失导致胸腺、脾脏和肝脏中iNKT细胞数量严重减少。细胞数量的减少是由于胸腺发育过程中第1阶段增殖减少和细胞凋亡增加所致。因此,我们描述了Runx 1在iNKT细胞发育和分化中的新作用,特别是在协调iNKT 17分化中。
iNKT cells are a unique lineage of T cells that recognize glycolipid presented by CD1d. In the thymus, they differentiate into iNKT1, iNKT2 and iNKT17 effector subsets, characterized by preferential expression of Tbet, Gata3 and ROR-γt and production of IFN-γ, IL-4 and IL-17, respectively. We demonstrate that the transcriptional regulator Runx1 is essential for the generation of ROR-γt expressing iNKT17 cells. PLZF-cre Runx1 cKO mice lack iNKT17 cells in the thymus, spleen and liver. Runx1-deficient iNKT cells have altered expression of several genes important for iNKT17 differentiation, including decreased expression of IL-7Rα, BATF and c-Maf and increased expression of Bcl11b and Lef1. However, reduction of Lef1 expression or introduction of an IL-7Rα transgene is not sufficient to correct the defect in iNKT17 differentiation, demonstrating that Runx1 is a key regulator of several genes required for iNKT17 differentiation. Loss of Runx1 leads to a severe decrease in iNKT cell numbers in the thymus, spleen and liver. The decrease in cell number is due to a combined decrease in proliferation at Stage 1 during thymic development and increased apoptosis. Thus, we describe a novel role of Runx1 in iNKT cell development and differentiation, particularly in orchestrating iNKT17 differentiation.
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