Netrin1 Produced by Neural Progenitors, Not Floor Plate Cells, Is Required for Axon Guidance in the Spinal Cord.
Netrin1 Produced by Neural Progenitors, Not Floor Plate Cells, Is Required for Axon Guidance in the Spinal Cord.
复制标题
脊髓中的轴突引导需要由神经祖细胞而非地板细胞产生的Netrin1。
DOI:
10.1016/j.neuron.2017.03.007
复制
发表时间:
2017-05-17
期刊:
影响因子:
16.2
通讯作者:
Butler SJ
中科院分区:
文献类型:
--
作者:
Varadarajan SG;Kong JH;Phan KD;Kao TJ;Panaitof SC;Cardin J;Eltzschig H;Kania A;Novitch BG;Butler SJ
Netrin1 has been proposed to act from the floor plate (FP) as a long-range diffusible chemoattractant for commissural axons in the embryonic spinal cord. However, netrin1 mRNA and protein are also present in neural progenitors within the ventricular zone (VZ), raising the question of which source of netrin1 promotes ventrally-directed axon growth. Here, we use genetic approaches in mice to selectively remove netrin from different regions of the spinal cord. Our analyses show that the FP is not the source of netrin1 directing axons to the ventral midline while local VZ-supplied netrin1 is required for this step. Furthermore, rather than being present in a gradient, netrin1 protein accumulates on the pial surface adjacent to the path of commissural axon extension. Thus, netrin1 does not act as a long-range secreted chemoattractant for commissural spinal axons, but instead promotes ventrally-directed axon outgrowth by haptotaxis, i.e. directed growth along an adhesive surface.
登录
查看更多内容
影响因子:
7.7
作者:
Akin O;Zipursky SL
通讯作者:
Zipursky SL
影响因子:
5.3
作者:
Kennedy, Timothy E.;Wang, Hao;Tessier-Lavigne, Marc
通讯作者:
Tessier-Lavigne, Marc
影响因子:
4.4
作者:
Han, H;Tanigaki, K;Honjo, T
通讯作者:
Honjo, T
影响因子:
16.2
作者:
Deiner, MS;Kennedy, TE;Sretavan, DW
通讯作者:
Sretavan, DW
影响因子:
16.6
作者:
Laumonnerie, Christophe;Tong, Yong Guang;Wilson, Sara I.
通讯作者:
Wilson, Sara I.