Mouse embryonic retina delivers information controlling cortical neurogenesis.

Mouse embryonic retina delivers information controlling cortical neurogenesis.
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DOI:
10.1371/journal.pone.0015211
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发表时间:
2010-12-08
期刊:
影响因子:
3.7
通讯作者:
Surace EM
Surace EM
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Bonetti C;Surace EM

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外在机制和内在机制对皮质发育的相对贡献是神经生物学中一个争论激烈的问题和一个突出的问题。目前,新兴的观点认为,内在遗传机制和外在信息之间的相互作用塑造了大脑皮层发育的不同阶段。然而,尽管早期新皮质发育事件的内在程序已经至少部分被破译,但外在信号的确切性质和影响仍然是难以捉摸的,也是有争议的。我们发现,在发育中的小鼠视觉系统中,胚胎阶段对自发视网膜活动(视网膜波-RWS)的急性药物抑制会增加皮质生成率(细胞周期退出)。此外,视网膜自发活动的早期扰动会导致较晚时间点的皮质层结构变化。这些数据表明,小鼠胚胎视网膜传递能够调节发育中的视皮层细胞发生的远程信息,自发活动是调节这一过程的候选远程作用的外部线索。此外,这些数据可能支持自发活动是协调中枢神经系统其他发育中的感觉通路或区域的神经发生的一般信号。
The relative contribution of extrinsic and intrinsic mechanisms to cortical development is an intensely debated issue and an outstanding question in neurobiology. Currently, the emerging view is that interplay between intrinsic genetic mechanisms and extrinsic information shape different stages of cortical development. Yet, whereas the intrinsic program of early neocortical developmental events has been at least in part decoded, the exact nature and impact of extrinsic signaling are still elusive and controversial. We found that in the mouse developing visual system, acute pharmacological inhibition of spontaneous retinal activity (retinal waves-RWs) during embryonic stages increase the rate of corticogenesis (cell cycle withdrawal). Furthermore, early perturbation of retinal spontaneous activity leads to changes of cortical layer structure at a later time point. These data suggest that mouse embryonic retina delivers long-distance information capable of modulating cell genesis in the developing visual cortex and that spontaneous activity is the candidate long-distance acting extrinsic cue mediating this process. In addition, these data may support spontaneous activity to be a general signal coordinating neurogenesis in other developing sensory pathways or areas of the central nervous system.
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