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斑马鱼通过与TATA盒结合蛋白相关的因子Trf3启动血液形成
Daniel O Hart1, Tamal Raha, Nathan D Lawson
1Howard Hughes Medical Institute, University of Massachusetts Medical School, 364 Plantation Street, Worcester, Massachusetts 01605, USA.
Nature
|November 30, 2007
概括
与TATA盒结合蛋白 (TBP) 相关的3因子 (TRF3) 对斑马鱼胚胎发生和血液形成至关重要. TRF3调节mespa,这是一个对中皮特异性和造血发育至关重要的基因.
科学领域:
- 发育生物学 发展生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 与TATA盒结合蛋白 (TBP) 相关的3因子 (TRF3),也称为TBP2,是一种脊椎动物特有的蛋白质.
- TRF3与TBP具有结构上的相似性,并且在胚胎发育过程中高度表达.
- 以前的研究表明,TRF3在各种物种的胚胎发生过程中起着至关重要的作用.
研究的目的:
- 研究TRF3在斑马鱼胚胎发生和血液形成中的作用.
- 为了确定参与这些发育过程的TRF3依赖基因.
- 阐明TRF3.3调节的分子途径.
主要方法:
- 在斑马鱼胚胎中使用反感性morpholino oligonucleotides减少TRF3.
- 基因表达分析以识别TRF3依赖基因.
- 染色体免疫沉 (ChIP) 验证TRF3与向基因促进体结合.
- 梅斯帕mRNA注射用于拯救发育缺陷.
- 表观性分析以确定基因作用的顺序.
主要成果:
- 缺少TRF3的斑马鱼胚胎表现出严重的发育缺陷,包括失败的造血.
- TRF3的枯竭导致了mespa的下调,这是一种对中皮特异性至关重要的基因.
- TRF3 直接与 mespa 促进体结合,而 mespa 枯竭导致 TRF3 枯竭.
- 梅斯帕对血液形成所需的基因cdx4起上游作用,建立TRF3-mespa-cdx4通路.
结论:
- TRF3对于斑马鱼的胚胎生成和血液形成至关重要.
- TRF3-mespa-cdx4通路对于中皮层与造血系的结合至关重要.
- TRF3启动了一种转录因子级联,该级联控制了脊椎动物早期的发育.
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