在已确定的基因边界之外的调控元素对于胚胎干细胞的多系分化是必需的
Veronika V Ermakova1, Nikita P Fokin1, Nikolay D Aksenov1
1Institute of Cytology, Russian Academy of Sciences, 194064 St.-Petersburg, Russia.
International journal of molecular sciences
|October 28, 2023
概括
Oct4基因 (Pou5f1) 对细胞多能性至关重要. 将其调节性DNA元素迁移到新的位置,扰乱了干细胞的自我更新和发育,突出了找到所有必要的调节性元素的必要性.
科学领域:
- 发展生物学 发展生物学
- 干细胞生物学 干细胞生物学
- 基因规则 基因规则
背景情况:
- Oct4 (Pou5f1) 是维持多能性的关键转录因子.
- Oct4作为一个先驱因素,使体细胞重新编程到多能状态.
- 了解Pou5f1基因调节对于各种多能状态至关重要.
研究的目的:
- 识别调节Pou5f1在不同多能状态中的表达的遗传元素.
- 研究cis调节元素在Pou5f1基因功能中的作用.
- 为了确定以前已知的cis元素是否足以进行适当的Pou5f1调节.
主要方法:
- 在小鼠胚胎干细胞 (ESC) 中将含有假定 cis 元素的 Pou5f1 基因片段转移到 Rosa26 位点.
- 评估社会经济协会的自我更新和差异化能力在纯粹的,形成性的和初级化的多能状态中.
- 对基因表达和基因操纵后的发育进展进行分析.
主要成果:
- 在Pou5f1基因片段转移到Rosa26位点中,在初始状态下损害了ESC自我更新.
- 基因操纵导致形成性和原始化的多能性状态之间的差异化失败.
- 这些发现表明,以前识别的cis元素对于适当的Pou5f1调节是不够的.
结论:
- 在Pou5f1基因已确定的边界之外的调节元素对于其在发育过程中的时空调节至关重要.
- 该研究强调了对控制Pou5f1.1的所有cis-regulatory元素进行全面描述的必要性.
- 适当调节Oct4对于通过不同的发育和多能性阶段的成功进展至关重要.
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