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Serotonergic Projections Govern Postnatal Neuroblast Migration

机译:Serotonergic预测治理后期神经细胞迁移

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摘要

In many vertebrates, postnatally generated neurons often migrate long distances to reach their final destination, where they help shape local circuit activity. Concerted action of extrinsic stimuli is required to regulate long-distance migration. Some migratory principles are evolutionarily conserved, whereas others are species and cell type specific. Here we identified a serotonergic mechanism that governs migration of postnatally generated neurons in the mouse brain. Serotonergic axons originating from the raphe nuclei exhibit a conspicuous alignment with subventricular zone-derived neuroblasts. Optogenetic axonal activation provides functional evidence for serotonergic modulation of neuroblast migration. Furthermore, we show that the underlying mechanism involves serotonin receptor 3A (5HT3A)-mediated calcium influx. Thus, 5HT3A receptor deletion in neuroblasts impaired speed and directionality of migration and abolished calcium spikes. We speculate that serotonergic modulation of postnatally generated neuroblast migration is evolutionarily conserved as indicated by the presence of serotonergic axons in migratory paths in other vertebrates.
机译:在许多脊椎动物中,出现后生成的神经元通常迁移到远距离达到最终目的地,在那里它们有助于塑造局部电路活动。外部刺激的协调作用是调节长距离迁移所必需的。一些迁移的原则正在进行中保存,而其他候语原则是特定的种类和细胞类型。在这里,我们鉴定了一种血清致癌机制,治理在小鼠脑中的后生成神经元的迁移。来自Raphe Nuclei的血清onOroneric轴突表现出与子心室区衍生的神经细胞的显着对准。致源性轴突激活为神经细胞迁移的血清onerogic调节提供功能证据。此外,我们表明潜在机制涉及血清素受体3a(5ht3a)介导的钙流入。因此,在神经细胞中的5HT3A受体缺失损失的速度和迁移方向性和废除钙峰值。我们推测出现后生成的神经细胞迁移的Serotonergic调节是如其他脊椎动物中的迁移路径中的血清奈良官轴突的存在所示。

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  • 来源
    《Neuron》 |2017年第3期|共25页
  • 作者单位

    Heidelberg Univ Med Fac Dept Clin Neurobiol D-69120 Heidelberg Germany;

    Heidelberg Univ Med Fac Dept Clin Neurobiol D-69120 Heidelberg Germany;

    Heidelberg Univ Med Fac Dept Clin Neurobiol D-69120 Heidelberg Germany;

    Res Ctr Julich GmbH Inst Neurosci &

    Med INM 2 Leo Brandt Str D-52425 Julich Germany;

    Res Ctr Julich GmbH Inst Neurosci &

    Med INM 2 Leo Brandt Str D-52425 Julich Germany;

    Heidelberg Univ Med Fac Dept Clin Neurobiol D-69120 Heidelberg Germany;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 神经病学;
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