从地板板衍生出的netrin-1是可供指导的
Chloé Dominici1, Juan Antonio Moreno-Bravo1, Sergi Roig Puiggros1,2
1Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 Rue Moreau, 75012 Paris, France.
Nature
|April 27, 2017
概括
网林-1 (Ntn1) 在中枢神经系统中指导轴突至关重要. 这项研究显示,Ntn1来自心室区域,而不是地板板,通过促进生长粘附来指导指导轴突.
科学领域:
- 神经科学
- 发育生物学
- 分子生物学
背景情况:
- 网林-1 (Ntn1) 是一种分泌的蛋白质,对轴突指导至关重要.
- 传统上认为它是由地板细胞分泌的,以吸引状轴突.
- 这种模型表明Ntn1的梯度指导了轴突路径.
研究的目的:
- 调查Netrin-1在指导轴突中的作用的来源和机制.
- 挑战地面板衍生的Ntn1梯度吸引的既定模型.
- 确定Ntn1在中枢神经系统中线轴突发育中的主要功能.
主要方法:
- 使用 Ntn1 条件淘汰鼠标模型在地板细胞中选择性地删除 Ntn1.
- 在淘汰小鼠中分析后脑和脊髓状轴突发育.
- 检查了心室区域的Ntn1表达及其在皮肤上的定位.
- 评估了Ntn1从心室区域删除对轴突导向的影响.
主要成果:
- 在没有地板衍生Ntn1的情况下正常发育.
- 网林-1在心室区域表达很高,并在海皮表面释放.
- 从心室区域中删除Ntn1模仿了全球Ntn1淘汰小鼠的缺陷.
- 网林-1的主要作用是局部,促进增长粘附而不是长距离梯度吸引.
结论:
- 经典模型的地板衍生的Netrin-1梯度吸引是不准确的.
- 网林-1主要从心室区域局部起作用,以指导指导轴突.
- 在中枢神经系统中找到轴突路径的关键机制.
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