福西2和索克斯3是主调节器,控制着ectoderm的生殖层规范.
Clark L Hendrickson1, Ira L Blitz1, Amina Hussein1,2
1Developmental and Cell Biology, University of California, Irvine, CA, USA.
bioRxiv : the preprint server for biology
|January 20, 2025
概括
母体转录因子Foxi2和Sox3是Xenopus中外皮生殖层特异性的关键调节者. 它们通过与cis调节模块结合来控制外皮基因激活,并塑造表观遗传景观.
科学领域:
- 发展生物学 发展生物学
- 遗传学 遗传学是一种遗传学.
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 胚胎层的规范对于脊椎动物的发育至关重要,它可以从多能细胞中建立不同的细胞系.
- 了解控制早期细胞命运决定的分子机制对于发育生物学来说至关重要.
研究的目的:
- 识别和描述Xenopus体内外皮生殖层特征的主调节者.
- 阐明这些调节器控制外皮基因表达和表观遗传景观的分子机制.
主要方法:
- 在Xenopus胚胎中进行了宫外基因表达实验.
- 转录学 (RNA测序) 用于分析基因表达变化.
- 染色体免疫沉 (ChIP) 试验用于研究转录因子结合和基因素修饰 (H3K27ac).
- 对 cis 调节模块 (CRM) 和超级增强器 (SE) 的分析.
主要成果:
- 鉴定出Foxi2和Sox3是母体转录因子,对于Xenopus的外皮特异性至关重要.
- 在潜在内皮组织中,Foxi2和Sox3诱导的外皮标记物和被抑制的间皮标记物的同时表达.
- 福西2和索克斯3共同且独立地调节数百个外皮向基因.
- 这些因素预先与CRMs结合,促进Ep300的招募和H3K27ac的沉积,从而塑造了外皮表观遗传景观.
- 与外皮特异性超级增强剂 (SE) 相关的CRM对于强大的外皮基因激活至关重要.
结论:
- 福西2和索克斯3作为Xenopus中外皮系谱规范的中心架构师.
- 这项研究强调了外皮SE关联CRM在早期发育过程中的精确和强大的基因激活中的作用.
- 这些发现为转录和表观遗传控制胚胎层形成提供了关键的见解.
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