促红细胞生成素信号调节胎儿神经祖细胞中的关键表观遗传和转录网络。

Erythropoietin Signaling Regulates Key Epigenetic and Transcription Networks in Fetal Neural Progenitor Cells.

机构信息

Department of Pediatrics, University of Rochester, Rochester, New York, USA.

Functional Genomic Center, University of Rochester, Rochester, New York, USA.

出版信息

Sci Rep. 2017 Oct 30;7(1):14381. doi: 10.1038/s41598-017-14366-0.

Abstract

Erythropoietin (EPO) and its receptor are highly expressed in the developing nervous system, and exogenous EPO therapy is potentially neuroprotective, however the epigenetic and transcriptional changes downstream of EPO signaling in neural cells are not well understood. To delineate epigenetic changes associated with EPO signaling, we compared histone H3 lysine 4 dimethylation (H3K4me2) in EPO treated and control fetal neural progenitor cells, identifying 1,150 differentially bound regions. These regions were highly enriched near protein coding genes and had significant overlap with H4Acetylation, a mark of active regulatory elements. Motif analyses and co-occupancy studies revealed a complex regulatory network underlying the differentially bound regions, including previously identified mediators of EPO signaling (STAT5, STAT3), and novel factors such as REST, an epigenetic modifier central to neural differentiation and plasticity, and NRF1, a key regulator of antioxidant response and mitochondrial biogenesis. Global transcriptome analyses on neural tubes isolated from E9.0 EpoR-null and littermate control embryos validated our in vitro findings, further suggesting a role for REST and NRF1 downstream of EPO signaling. These data support a role for EPO in regulating the survival, proliferation, and differentiation of neural progenitor cells, and suggest a basis for its function in neural development and neuroprotection.

摘要

促红细胞生成素 (EPO) 及其受体在发育中的神经系统中高度表达,外源性 EPO 治疗具有潜在的神经保护作用,然而,EPO 信号在神经细胞中的表观遗传和转录变化尚不清楚。为了描绘与 EPO 信号相关的表观遗传变化,我们比较了 EPO 处理和对照胎儿神经祖细胞中的组蛋白 H3 赖氨酸 4 二甲基化 (H3K4me2),鉴定出 1150 个差异结合区域。这些区域高度富集在蛋白质编码基因附近,并且与 H4 乙酰化(一种活跃的调节元件标记)具有显著重叠。基序分析和共占据研究揭示了差异结合区域背后的复杂调控网络,包括先前鉴定的 EPO 信号转导介质(STAT5、STAT3),以及新的因素,如 REST,一种对神经分化和可塑性至关重要的表观遗传修饰因子,以及 NRF1,一种抗氧化反应和线粒体生物发生的关键调节因子。从 E9.0 EpoR 缺失和同窝对照胚胎中分离的神经管进行的全转录组分析验证了我们的体外发现,进一步表明 REST 和 NRF1 在 EPO 信号下游发挥作用。这些数据支持 EPO 在调节神经祖细胞的存活、增殖和分化中的作用,并为其在神经发育和神经保护中的功能提供了依据。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c34/5662632/134f6a21548a/41598_2017_14366_Fig1_HTML.jpg

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索