脊髓神经元的多样性在青变形过程中随着游泳到肢体的转变而呈指数级增大
David Vijatovic1, Florina Alexandra Toma1, Zoe P M Harrington1
1Institute of Science and Technology Austria, Klosterneuburg, Austria.
bioRxiv : the preprint server for biology
|September 30, 2024
概括
在青变形过程中,脊柱运动回路的数量和多样性急剧扩大,使得肢体的复杂运动成为可能. 这种神经发育显示了哺乳动物运动系统的惊人进化保护.
科学领域:
- 神经科学是一个神经科学.
- 发展生物学 发展生物学
- 进化生物学 进化生物学
背景情况:
- 脊椎动物表现出不同的运动行为,从游泳到四肢运动.
- 青变形提供了一个独特的模型来研究从水中运动到陆地运动的发展过渡.
研究的目的:
- 为了研究青变形期间脊柱运动回路的变化.
- 了解基于四肢的运动出现的神经基础.
主要方法:
- 在和变形青中对脊髓发育的比较分析.
- 运动神经元 (MN) 和V1内神经元 (V1s) 的转录造型.
- 关键发育决定因素的CRISPR/Cas9基因破坏 (FoxP1, Engrailed-1).
主要成果:
- 早期的子脊髓具有小,均的MN和V1种群.
- 变形触发了MN和V1数量和转录多样性的急剧增加.
- 破坏FoxP1和Engrailed-1可以选择性地损害尾巴和四肢功能.
- 发育中的运动电路在分子层面上类似于哺乳动物的运动系统.
结论:
- 神经多样性尺度与行为复杂性.
- 动力电路组织表明,物种之间存在显著的进化保护.
- 特定的基因 (FoxP1,Engrailed-1) 对于四肢运动控制的发展至关重要.
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