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microRNA-124 直接抑制 Nodal 和 Notch,以调节中皮层发育

Kalin D Konrad¹, Malcolm Arnott¹, Michael Testa¹

¹Department of Biological Sciences, University of Delaware, Newark, DE 19716, USA.

Developmental biology

|July 7, 2023

概括

微RNA-124 (miR-124) 通过控制中皮细胞分化来调节海膽胚胎的发育. 它抑制了Nodal和Notch信号通路,影响了布拉斯托科拉细胞和色素细胞的命运.

科学领域:

发展生物学发展生物学
分子生物学分子生物学
海洋生物学海洋生物学

背景情况:

微RNAs (miRNAs) 是基因表达的关键转录后调节者.
微RNA-124 (miR-124) 主要是因为它在神经生成中的作用而被研究.
在中皮细胞分化的miR-124的功能仍然在很大程度上未被探索.

研究的目的:

研究miR-124在调节海胚胎中中皮层细胞分化中的新型作用.
为了确定参与细胞命运决定的miR-124的下游目标.
阐明miR-124对叶芽细胞 (BCs) 和色素细胞 (PCs) 发育的影响.

主要方法:

在海膽胚胎生成過程中對miR-124的表達分析.
涉及抑制miR-124及其标的功能研究 (Nodal,Notch).
使用转录因子 (TFs) 分析BCs和PCs的细胞分化标志物.

主要成果:

miR-124的表达始于早期的芽细胞阶段,与内皮体内皮体特异性相吻合.
miR-124直接抑制了节点和痕信号通路.
抑制miR-124导致BCs增加和PCs减少,而Notch抑制导致BCs和PCs增加,包括混合细胞.

结论:

在海胚胎中,miR-124在BCs和PCs之间的二元命运决定中发挥着关键作用.
通过miR-124调节节点和痕信号通路,对于正确的中皮细胞分化至关重要.
这项研究揭示了miR-124在通过保存的信号通路调节细胞分化和增殖方面的新功能.

关键词:

血栓细胞的细胞质细胞.颜料细胞是一种颜料细胞.转录后的监管转录后的监管海是海的一种.

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