根据剂量,CDX2会影响基因调节网络,这些基因是人类胚胎外半皮发育的基础
Emily A Bulger1,2, Todd C McDevitt1,3, Benoit G Bruneau1,4,5,6,7
1Gladstone Institute of Cardiovascular Disease, Gladstone Institutes, San Francisco, CA 94158, USA.
Biology open
|March 7, 2024
概括
CDX2基因剂量极大地影响了早期胚胎发育,特别是艾伦托斯. 这项研究揭示了CDX2水平如何控制基因网络,这些基因网络对于胚胎外中皮形成和血管发育至关重要.
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
- 基因组学就是基因组学.
背景情况:
- 转录因子CDX2对于早期胚胎发育至关重要,其损失会导致阿兰托斯缺陷.
- 了解CDX2在基因调节中的作用对于破译胚胎外半皮发育至关重要.
研究的目的:
- 研究CDX2对控制胚胎外半皮发育的基因调控网络的剂量依赖性影响.
- 确定在早期胚胎发生过程中由CDX2水平调节的特定途径.
主要方法:
- 工程人类诱导多能干细胞 (hiPSCs) 具有不同的CDX2基因型 (野生型,异合体,同合体零).
- 在二维胃类模型中分化了hiPSC,并进行了单核RNA和ATAC测序 (snRNA-seq和snATAC-seq).
- 将基因表达特征与TBXT-knockout hiPSC进行比较,以识别社区错误调节的基因.
主要成果:
- 根据剂量,CDX2调节关键的发育途径,包括VEGF和非正规的WNT信号传递.
- 异构体CDX2细胞中的染色体可访问性类似于野生类型,表明基因表达变异性不仅仅是由于可访问性.
- 确定了CDX2和TBXT之间错误调节的共享基因 - 功能丧失,对细胞骨完整性和组织透性至关重要.
结论:
- CDX2剂量精确地控制了胚胎外半皮中的基因表达.
- 这些发现阐明了CDX2在血管发育和全身延伸中的作用,为发育缺陷提供了洞察力.
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