New neurons clear the path of astrocytic processes for their rapid migration in the adult brain.

New neurons clear the path of astrocytic processes for their rapid migration in the adult brain.
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DOI:
10.1016/j.neuron.2010.06.018
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发表时间:
2010-07-29
期刊:
影响因子:
16.2
通讯作者:
Sawamoto, Kazunobu
Sawamoto, Kazunobu
中科院分区:
医学1区
文献类型:
--
作者:
Kaneko, Naoko;Marin, Oscar;Koike, Masato;Hirota, Yuki;Uchiyama, Yasuo;Wu, Jane Y.;Lu, Qiang;Tessier-Lavigne, Marc;Alvarez-Buylla, Arturo;Okano, Hideyuki;Rubenstein, John L. R.;Sawamoto, Kazunobu

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在成年哺乳动物的长距离神经元迁移中,年轻的神经元从脑室下区移动到嗅球,这是一段很长的旅程(根据物种的不同,从毫米到厘米)。这些神经元如何通过成年脑实质神经元和神经胶质突起的致密网络迁移?先前的研究表明,年轻的神经元通过星形细胞隧道成链地迁移来实现这一点。在这里,我们报告了年轻的迁移神经元主动控制自己迁移路线的形成和维持。新的神经元分泌可扩散的蛋白Slit1,其受体Robo在星形胶质细胞上表达。我们发现,Sit-Robo通路是星形胶质细胞形态和组织改变所必需的,这些改变导致星形胶质细胞隧道的形成和维持。通过这种神经元-神经胶质细胞的相互作用,新的神经元调节星形细胞网络的形成,这是使它们在成年大脑中快速定向迁移所必需的。
In the long-range neuronal migration of adult mammals, young neurons travel from the subventricular zone to the olfactory bulb, a long journey (millimeters to centimeters, depending on the species). How can these neurons migrate through the dense meshwork of neuronal and glial processes of the adult brain parenchyma? Previous studies indicate that young neurons achieve this by migrating in chains through astrocytic tunnels. Here, we report that young migrating neurons actively control the formation and maintenance of their own migration route. New neurons secrete the diffusible protein Slit1, whose receptor, Robo, is expressed on astrocytes. We show that the Slit-Robo pathway is required for morphologic and organizational changes in astrocytes that result in the formation and maintenance of the astrocytic tunnels. Through this neuron-glia interaction, the new neurons regulate the formation of the astrocytic meshwork that is needed to enable their rapid and directional migration in adult brain.
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