Differential repression of Otx2 underlies the capacity of NANOG and ESRRB to induce germline entry

Differential repression of Otx2 underlies the capacity of NANOG and ESRRB to induce germline entry
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Otx2 的差异抑制是 NANOG 和 ESRRB 诱导种系进入能力的基础

DOI:
10.1101/2021.06.14.448276
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发表时间:
2021
期刊:
--
影响因子:
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通讯作者:
Vojtek M
Vojtek M
中科院分区:
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文献类型:
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作者:
Vojtek M

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原始生殖细胞(Primorial Germ Cells,PGCs)是由植入后的上胚层细胞对细胞因子信号的反应而产生的。PGC的发育可以通过细胞因子刺激将上皮样细胞(EpiLCs)分化为PGC样细胞(PGCLCs)而在体外重塑。有趣的是,转录因子(TF)NANOG的强制表达可以绕过PGCLC诱导所需的细胞因子。然而,其潜在的机制还没有完全阐明。在这里,我们表明,NANOG在没有细胞因子的情况下介导Otx2下调,这是NANOG诱导PGCLC所必需的。此外,直接的NANOG靶基因Esrrb可以替代多种NANOG功能,在EpiLCs中过表达时不下调Otx2,也不能促进PGCLC的特异性,但Esrrb在Otx2+/−EpiLCs中的表达挽救了PgCLC的出现。这项研究阐明了在PGC规范的最早阶段发生的转换函数的相互作用。
Primordial germ cells (PGCs) arise from cells of the post-implantation epiblast in response to cytokine signaling. PGC development can be recapitulatedin vitroby differentiating epiblast-like cells (EpiLCs) into PGC-like cells (PGCLCs) through cytokine exposure. Interestingly, the cytokine requirement for PGCLC induction can be bypassed by enforced expression of the transcription factor (TF) NANOG. However, the underlying mechanisms are not fully elucidated. Here, we show that NANOG mediatesOtx2downregulation in the absence of cytokines and that this is essential for PGCLC induction by NANOG. Moreover, the direct NANOG target geneEsrrb, which can substitute for several NANOG functions, does not downregulateOtx2when overexpressed in EpiLCs and cannot promote PGCLC specification.However, expression of ESRRB inOtx2+/−EpiLCs rescues emergence of PGCLCs. This study illuminates the interplay of TFs occurring at the earliest stages of PGC specification.
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