霍克斯基因的局部和短暂转录表明,模式和细分时钟之间存在联系
1Department of Zoology and Animal Biology, University of Geneva, Sciences III, Quai Ernest Ansermet 30, 1211 Geneva 4, Switzerland.
Cell
|August 21, 2001
概括
在发育中的胚胎中,霍克斯基因激活发生在动态条纹中,与细分协调. 这个过程依赖于Notch信号,将基因表达与细分时钟联系起来.
科学领域:
- 发育生物学是发展生物学.
- 基因调节 基因调节
- 分子生物学分子生物学
背景情况:
- 在发育过程中,霍克斯基因转录遵循染色体顺序,并且发生在前性中皮层中.
- 协调霍克斯基因激活与体质发生的精确机制尚不清楚.
研究的目的:
- 为了研究Hox基因表达的时空动力学在前性中皮.
- 为了阐明Notch信号在调节Somitogenesis期间的Hox基因激活中的作用.
主要方法:
- 在小鼠胚胎中分析霍克斯基因表达模式 (Hoxd1等).
- 在缺乏RBPJk的小鼠中,对Hox基因表达的研究,这些小鼠缺乏功能性的Notch通路效应器.
主要成果:
- 霍克斯基因在前性中皮体内表现出动态的表达条纹.
- 转录突发是这种动态表达的基础,可能会协调霍克斯激活与体质生成.
- 缺少RBPJk的小鼠在前体皮层中显著减少了Hoxd基因表达,这意味着Notch信号传递.
结论:
- 霍克斯基因激活和细分钟之间存在分子联系,由Notch信号介导.
- 这种联系确保了胚胎部分的同步生产和形态规范.
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