在原脊椎动物的神经管关闭期间,类似对规则的转录模式
Gabrielle Östlund-Sholars1,2, Laurence A Lemaire2,3, Michael S Levine1,2
1Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA.
Development (Cambridge, England)
|November 11, 2025
概括
研究人员确定了一种调节神经管关闭 (NTC) 的基因电路. 该电路涉及LMx1和Cdkn1b,协调细胞增殖和融合,提供对胚胎发育和上皮重塑的见解.
科学领域:
- 发展生物学 发展生物学
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 神经管闭合 (NTC) 对于状细胞的发育至关重要,形成了中枢神经系统.
- 虽然在脊椎动物中已知NTC的机械和信号方面,但对底层的转录调节的理解较少.
- 衣动物提供了一个模型系统来研究保存的发育过程.
研究的目的:
- 为了识别控制背部中线动态的转录程序在NTC期间在Ciona的衣.
- 阐明Lmx1,Cdkn1b和Msx在NTC协调中的作用.
- 了解转录调节如何影响胚胎发生过程中的上皮质重塑.
主要方法:
- 高分辨率的HCR在现场杂交以可视化基因表达模式.
- 错误表达实验以确定基因功能.
- 对单细胞RNA-seq数据集的分析,以识别不同的细胞群.
主要成果:
- 一个涉及LMx1,Cdkn1b和Msx的转录电路被确定.
- 在NTC期间,LMx1表达以后向前波推进,而Msx在NTC期间下调.
- Lmx1促进扩散和自我调节;Cdkn1b限制扩散和阻碍关闭.
- 通过scRNA-seq.揭示了表达LMx1或Cdkn1b的明显的背部神经群体.
结论:
- 一个涉及Lmx1和Cdkn1b的转录开关在NTC期间协调细胞增殖和融合.
- 这种电路表明,在动物胚胎中调节上皮质重塑的一种保存策略.
- 这些发现有助于我们更好地了解胚胎发育背后的分子机制.
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