Cortical GABAergic Interneurons Transiently Assume a Sea Urchin-Like Nonpolarized Shape before Axon Initiation
Cortical GABAergic Interneurons Transiently Assume a Sea Urchin-Like Nonpolarized Shape before Axon Initiation
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皮质 GABA 能中间神经元在轴突启动前短暂呈现海胆样非极化形状
DOI：
10.1523/jneurosci.1527-10.2010
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
F. Murakami
中科院分区：
文献类型：
--
作者：
Emi Yamasaki;Daisuke H. Tanaka;Y. Yanagawa;F. Murakami
Mature neurons polarize by extending an axon and dendrites. In vitro studies of dissociated neurons have demonstrated that axons are initiated from a nonpolarized stage. Dissociated hippocampal neurons form four to five minor neurites shortly after plating but then one of them starts to elongate rapidly to become the future axon, whereas the rest constitutes the dendrites at later stages. However, neuroepithelial cells as well as migrating neurons in vivo are already polarized, raising the possibility that mature neurons inherit the polarities of immature neurons of neuroepithelial or migrating neurons. Here we show that the axon of interneurons in mouse cortical explant emerges from a morphologically nonpolarized shape. The morphological maturation of cortical interneurons labeled by electroporation at an embryonic stage was analyzed by time-lapse imaging during the perinatal stage. In contrast to earlier stages, most interneurons at this stage show sea urchin-like nonpolarized shapes with alternately extending and retracting short processes. Abruptly, one of these processes extends to give rise to an outstandingly long axon-like process. Given that the interneurons exhibit typical polarized shapes during embryonic development, the present results suggest that axon–dendrite polarity develops from a nonpolarized intermediate stage.
影响因子：
4.6
作者：
F. Polleux;Kristin L. Whitford;P. Dijkhuizen;T. Vitalis;Anirvan Ghosh
通讯作者：
F. Polleux;Kristin L. Whitford;P. Dijkhuizen;T. Vitalis;Anirvan Ghosh
影响因子：
56.9
作者：
Polleux, F;Giger, RJ;Ghosh, A
通讯作者：
Ghosh, A
影响因子：
56.9
作者：
Anderson, SA;Eisenstat, DD;Rubenstein, JLR
通讯作者：
Rubenstein, JLR