HDAC3 Is a Master Regulator of mTEC Development.

HDAC3 Is a Master Regulator of mTEC Development.
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DOI:
10.1016/j.celrep.2016.03.048
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发表时间:
2016-04-19
期刊:
影响因子:
8.8
通讯作者:
Abramson J
Abramson J
中科院分区:
生物学1区
文献类型:
--
作者:
Goldfarb Y;Kadouri N;Levi B;Sela A;Herzig Y;Cohen RN;Hollenberg AN;Abramson J

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胸腺为T淋巴细胞的发育和选择提供了独特的微环境。胸腺髓质上皮细胞(mTECs)通过促进自身反应性胸腺细胞的负选择和Foxp 3+调节性T细胞的产生在这一过程中发挥关键作用。尽管研究强调非经典NFκB通路是mTEC发育的关键调节因子,但对调节这一过程的分子通路的全面理解仍然不完全。在这里,我们表明,功能主管mTECs的发展是由组蛋白脱乙酰酶3(Hdac 3)。虽然组蛋白去乙酰化酶是全局转录调节因子,但这种作用仅对Hdac 3具有高度特异性,因为Hdac 1和Hdac 2的失活都不会引起mTEC消融。有趣的是,Hdac 3诱导mTEC特异性转录程序,独立于先前识别的RANK-NFκB信号通路。因此,我们的研究结果揭示了TEC谱系分化的另一层复杂性,并强调Hdac 3是mTEC分化的主要和特异性分子开关。Goldfar B等人表明,Hdac 3对胸腺髓质上皮细胞(mTEC)的正常发育和功能至关重要,不依赖于非经典NFκB信号传导。他们的发现强调了Hdac 3作为诱导未成熟TEC中mTEC转录程序的主开关。
The thymus provides a unique microenvironment enabling development and selection of T lymphocytes. Medullary thymic epithelial cells (mTECs) play a pivotal role in this process by facilitating negative selection of self-reactive thymocytes and the generation of Foxp3+ regulatory T cells. Although studies highlighted the non-canonical NFκB pathway as the key regulator of mTEC development, comprehensive understanding of the molecular pathways regulating this process still remains incomplete. Here we demonstrate that the development of functionally competent mTECs is regulated by the histone deacetylase 3 (Hdac3). Although histone deacetylases are global transcriptional regulators this effect is highly specific only to Hdac3, as neither Hdac1 nor Hdac2 inactivation caused mTEC ablation. Interestingly, Hdac3 induces an mTEC-specific transcriptional program independently of the previously recognized RANK-NFκB signaling pathway. Thus, our findings uncover yet another layer of complexity of TEC lineage divergence and highlight Hdac3 as a major and specific molecular switch crucial for mTEC differentiation. Goldfarb et al. show that Hdac3 is essential for normal development and function of medullary thymic epithelial cells (mTECs) independently of non-canonical NFκB signaling. Their findings highlight Hdac3 as a master switch inducing the mTEC transcriptional program in immature TECs.
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