Altered Maturation of Medullary TEC in EphB-Deficient Thymi Is Recovered by RANK Signaling Stimulation.

Altered Maturation of Medullary TEC in EphB-Deficient Thymi Is Recovered by RANK Signaling Stimulation.
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DOI:
10.3389/fimmu.2018.01020
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发表时间:
2018
影响因子:
7.3
通讯作者:
Zapata AG
Zapata AG
中科院分区:
医学2区
文献类型:
--
作者:
Montero-Herradón S;García-Ceca J;Zapata AG

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在本研究中,EphB2和EphB3酪氨酸激酶受体的胸腺髓质上皮细胞(TEC)的成熟的相关性进行了分析。这两种分子的缺乏,特别是EphB 2的缺乏,导致髓质Cld 3、4hiSSEA1+上皮祖细胞、成熟髓质上皮细胞的成熟改变,其通过特异性细胞标志物(包括UEA 1、MHCII、CD 40、CD 80和AIRE)的表达来定义,以及髓质胰岛的扩增减少。体内测定表明,这些变化是TEC和胸腺细胞中EphB缺乏的结果。另一方面,成年胸腺中的变化与EphB缺陷胸腺中E15.5 Vγ5+RANKL+细胞比例降低密切相关,这可能导致RANK+髓质TEC成熟刺激降低,这一事实通过激动剂抗CD40 hiCD80+和MHCIIhiUEA1+突变体E14.5淋巴状胸腺叶的成熟髓质TEC的比例恢复得到证实。RANK抗体治疗。因此,EphB缺乏对髓质TEC成熟的影响通过RANK刺激恢复。
In the present study, the relevance of EphB2 and EphB3 tyrosine kinase receptors for the maturation of medullary thymic epithelial cells (TECs) is analyzed. The absence of both molecules, but particularly that of EphB2, courses with altered maturation of medullary Cld3,4hiSSEA1+ epithelial progenitor cells, mature medulla epithelial cells, defined by the expression of specific cell markers, including UEA1, MHCII, CD40, CD80, and AIRE, and reduced expansion of medullary islets. In vivo assays demonstrate that these changes are a consequence of the absence of EphBs in both TECs and thymocytes. On the other hand, the changes, that remains in the adult thymus, correlated well with reduced proportions of E15.5 Vγ5+RANKL+ cells in EphB-deficient thymi that could result in decreased stimulation of RANK+ medullary TECs to mature, a fact that was confirmed by recovering of proportions of both CD40hiCD80+ and MHCIIhiUEA1+ mature medullary TECs of mutant E14.5 alymphoid thymic lobes by agonist anti-RANK antibody treatment. Accordingly, the effects of EphB deficiency on medullary TECs maturation are recovered by RANK stimulation.
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