CD69 prevents PLZF(hi) innate precursors from prematurely exiting the thymus and aborting NKT2 cell differentiation.

CD69 prevents PLZF(hi) innate precursors from prematurely exiting the thymus and aborting NKT2 cell differentiation.
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DOI:
10.1038/s41467-018-06283-1
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发表时间:
2018-09-14
影响因子:
16.6
通讯作者:
Nakayama T
Nakayama T
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Kimura MY;Igi A;Hayashizaki K;Mita Y;Shinzawa M;Kadakia T;Endo Y;Ogawa S;Yagi R;Motohashi S;Singer A;Nakayama T

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虽然CD69可能通过抑制S1P1表达来调节胸腺细胞的分泌,但CD69的表达并不被认为是正常胸腺细胞发育所必需的。在这里,我们表明CD69实际上是成熟的NKT2细胞分化所需要的,而成熟的NKT2细胞本身并不表达CD69。从机制上讲,CD24+ PLZFhi先天前体需要CD69表达才能保留在胸腺中并完成向成熟NKT2细胞的分化。相比之下,cd69缺陷的CD24+ PLZFhi先天前体表达S1P1并过早退出胸腺,而S1P1抑制剂治疗的cd69缺陷小鼠保留了胸腺中的CD24+ PLZFhi先天前体并恢复了NKT2细胞分化。因此,CD69可阻止CD24+ PLZFhi先天前体细胞上S1P1的表达使胸腺内NKT2分化流产。这项研究揭示了CD69对于延长发育未成熟前体的胸腺停留时间对于T细胞亚群的适当分化的重要性。CD69与介导胸腺细胞分泌的趋化因子受体S1P1竞争在胸腺细胞表面的表达,但CD69是否为正常胸腺发育所必需尚不清楚。在这里,作者表明CD69和S1P1通过调节NKT2前体的胸腺输出来协同控制2型自然杀伤(NKT2)细胞的分化。
While CD69 may regulate thymocyte egress by inhibiting S1P1 expression, CD69 expression is not thought to be required for normal thymocyte development. Here we show that CD69 is in fact specifically required for the differentiation of mature NKT2 cells, which do not themselves express CD69. Mechanistically, CD69 expression is required on CD24+ PLZFhi innate precursors for their retention in the thymus and completion of their differentiation into mature NKT2 cells. By contrast, CD69-deficient CD24+ PLZFhi innate precursors express S1P1 and prematurely exit the thymus, while S1P1 inhibitor treatment of CD69-deficient mice retains CD24+ PLZFhi innate precursors in the thymus and restores NKT2 cell differentiation. Thus, CD69 prevents S1P1 expression on CD24+ PLZFhi innate precursor cells from aborting NKT2 differentiation in the thymus. This study reveals the importance of CD69 to prolong the thymic residency time of developing immature precursors for proper differentiation of a T cell subset. CD69 competes with S1P1, a chemokine receptor mediating thymocyte egress, for surface expression on thymocytes, but whether CD69 is required for normal thymic development is unclear. Here the authors show that CD69 and S1P1 synergize to control type 2 natural killer (NKT2) cells differentiation by modulating the thymic egress of NKT2 precursor.
DOI: 10.1038/ni.3560
发表时间: 2016-12
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影响因子: 30.5
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