lncRNA DUBR是由CTCF调节的,它协调了血液细胞中的染色体格局和基因表达
Hober Nelson Núñez-Martínez1, Gustavo Tapia-Urzúa1, Ángel Josué Cerecedo-Castillo1
1Instituto de Fisiología Celular, Departamento de Genética Molecular, Universidad Nacional Autónoma de México, 04510, Ciudad de México, México.
Nucleic acids research
|February 25, 2025
概括
在红细胞发育过程中,CCCCTC结合因子 (CTCF) 约束长非编码RNA DUBR. DUBR调节了造血基因分化基因和染色质的可访问性.
科学领域:
- 血液形成的研究研究.
- 表观遗传学和基因调节
背景情况:
- 主造血转录因子 (TFs) 和长非编码RNA (lncRNAs) 在造血差异化过程中协调血统特定的基因表达.
- 建筑蛋白CCCTC结合因子 (CTCF) 是细胞分化中的基因表达的关键调节者,但其在血液形成过程中的lncRNA调节中的作用尚不清楚.
研究的目的:
- 研究CTCF和lncRNA基因在血液形成中的关系.
- 阐明CTCF在红细胞分化过程中对lncRNA DUBR的调节作用.
主要方法:
- 证明了CTCF在限制红细胞分化过程中的lncRNA DUBR转录中的作用.
- 在人类造血干细胞和原生细胞 (HSPCs) 和红细胞质细胞中分析了DUBR表达.
- 研究了DUBR扰动对造血细胞-红色素细胞分化基因和调控元素的影响.
- 创建了RNA占用的基因组图,以确定与DUBR相关的基因.
主要成果:
- 在红细胞分化过程中,CTCF限制了 lncRNA DUBR 转录.
- 在HSPC中,DUBR的表达很高,但在红细胞中却很少.
- DUBR扰动调节失调了造血细胞-红细胞分化基因,并激活了全基因组的调节元件.
- DUBR与调节血液形成分化的基因有关,包括红色素抑制剂HES1.1.
结论:
- DUBR 作为血液形成区分基因程序中的调节剂.
- DUBR协调基因表达,并在血液形成过程中影响染色体调节格局.
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