E2A proteins promote development of lymphoid-primed multipotent progenitors.

E2A proteins promote development of lymphoid-primed multipotent progenitors.
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E2A蛋白促进淋巴酸化的多能祖细胞的发展。

DOI:
10.1016/j.immuni.2008.05.015
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发表时间:
2008-08-15
期刊:
影响因子:
32.4
通讯作者:
Kee, Barbara L.
Kee, Barbara L.
中科院分区:
医学1区
文献类型:
--
作者:
Dias, Sheila;Mansson, Robert;Gurbuxani, Sandeep;Sigvardsson, Mikael;Kee, Barbara L.

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HSC的第一个淋巴样限制后代是淋巴结的多能祖细胞(LMPPS),它们几乎没有红细胞芽孢杆菌潜力,但保留淋巴样和粒细胞/巨噬细胞分化能力。尽管鉴定LMPP的最新进展,但仍有待鉴定的转录因子仍然有待鉴定。在这里,我们证明了E2A转录因子是正确开发LMPP所必需的。在HSC和LMPPS中,E2A蛋白的一部分与淋巴样相关基因的质量表达,并防止在这些细胞中通常不普遍的基因表达,包括与HSC相关的基因和非淋巴基因。 E2A蛋白还限制了HSC,MPP和LMPP的增殖,并拮抗LMPPS向髓样命运的分化。我们的结果表明,E2A蛋白在支持HSC的淋巴样规范中起着至关重要的作用,而LMPP的生成减少是在E2A缺乏小鼠中观察到的严重淋巴细胞缺乏症的基础。
The first lymphoid restricted progeny of HSCs are lymphoid-primed multipotent progenitors (LMPPs), which have little erythro-myeloid potential but retain lymphoid and granulocyte/macrophage differentiation capacity. Despite recent advances in the identification of LMPPs the transcription factors essential for their generation remain to be identified. Here we demonstrate that the E2A transcription factors are required for proper development of LMPPs. Within HSCs and LMPPs, E2A proteins prime expression of a subset of lymphoid-associated genes and prevent expression of genes that are not normally prevalent in these cells, including HSC-associated and non-lymphoid genes. E2A proteins also restrict proliferation of HSCs, MPPs, and LMPPs and antagonize differentiation of LMPPs toward the myeloid fate. Our results reveal that E2A proteins play a critical role in supporting lymphoid specification from HSCs and that the reduced generation of LMPPs underlies the severe lymphocyte deficiencies observed in E2A-deficient mice.
DOI: 10.1084/jem.20042393
发表时间: 2005-03-21
期刊: The Journal of experimental medicine
影响因子: --
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