瑞瑞控制了视网酸信号和一些双边对称性
Gonçalo C Vilhais-Neto1, Mitsuji Maruhashi, Karen T Smith
1Stowers Institute for Medical Research, Missouri 64110, USA.
Nature
|February 19, 2010
概括
在Rere的一种突变通过影响视网膜酸信号来破坏小鼠胚胎中的索米特对称性. 这一发现可能解释了脊柱缺陷,比如人类的脊柱脊柱病.
科学领域:
- 发育生物学 发展生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 脊椎动物体平面组织的特点是双边对称.
- 索米特形成对骨发育至关重要,需要精确的对称性.
- 之前的研究表明,视网酸在保持索米特对称性方面起着作用.
研究的目的:
- 研究Rere基因在胚胎发育过程中建立索米特对称性的作用.
- 阐明Rere影响视网膜酸信号和左右模式的分子机制.
- 探索Rere调节错误与人类脊柱形之间的潜在联系.
主要方法:
- 对具有Rere基因突变的小鼠胚胎进行分析.
- 检查网红酸信号通路和与Fgf8.8的相互作用.
- 生物化学试验以表征Rere-Nr2f2-p300-氨酸受体复合体.
- 基因淘汰实验评估对视网膜酸向基因表达的影响.
主要成果:
- 罕见的突变导致老鼠胚胎中的不对称索米特形成.
- 瑞瑞调节视网膜酸信号传输,这对于保持索米特对称性至关重要.
- 瑞瑞与Nr2f2和p300相互作用,形成一个促进视网膜酸向基因转录的复合体.
- Nr2f2的不对称表达与改变的视网酸信号和一些不对称性相关.
结论:
- 雷尔基因通过其对视网膜酸信号的调节,在控制索米特对称性方面发挥着至关重要的作用.
- 已识别的Rere-containing复合体对于转录性激活视网膜酸点至关重要.
- 这种发育机制的失调可能会导致先天性脊柱异常,包括脊柱病.
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