Postmitotic Nkx2-1 controls the migration of telencephalic interneurons by direct repression of guidance receptors.

Postmitotic Nkx2-1 controls the migration of telencephalic interneurons by direct repression of guidance receptors.
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DOI:
10.1016/j.neuron.2008.07.024
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发表时间:
2008-09-11
期刊:
影响因子:
16.2
通讯作者:
Marín O
Marín O
中科院分区:
医学1区
文献类型:
--
作者:
Nóbrega-Pereira S;Kessaris N;Du T;Kimura S;Anderson SA;Marín O

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同源结构域转录因子Nkx 2 -1在端脑发育中起关键作用,在端脑发育中它调节内侧神经节隆起(MGE)中祖细胞的身份,并介导几类GABA能和胆碱能神经元的特化。在这里,我们已经调查了有丝分裂后的功能Nkx 2 -1在迁移的中间神经元起源于MGE。实验操作和小鼠遗传学表明,有丝分裂后细胞中Nkx 2 -1表达的下调是必要的迁移的interneurons的皮质,而Nkx 2 -1的表达的维护是必需的interneurons迁移到纹状体。Nkx 2 -1通过直接调节引导受体Neuropilin-2的表达在MGE衍生的中间神经元的迁移中发挥这种作用,Neuropilin-2使中间神经元能够侵入发育中的纹状体。我们的研究结果表明,细胞命运决定因子Nkx 2 -1在有丝分裂后细胞的指导受体的直接转录调控调节神经元迁移的新作用。
The homeodomain transcription factor Nkx2-1 plays key roles in the developing telencephalon, where it regulates the identity of progenitor cells in the medial ganglionic eminence (MGE) and mediates the specification of several classes of GABAergic and cholinergic neurons. Here we have investigated the postmitotic function of Nkx2-1 in the migration of interneurons originating in the MGE. Experimental manipulations and mouse genetics show that downregulation of Nkx2-1 expression in postmitotic cells is necessary for the migration of interneurons to the cortex, whereas maintenance of Nkx2-1 expression is required for interneuron migration to the striatum. Nkx2-1 exerts this role in the migration of MGE-derived interneurons by directly regulating the expression of a guidance receptor, Neuropilin-2, which enables interneurons to invade the developing striatum. Our results demonstrate a novel role for the cell-fate determinant Nkx2-1 in regulating neuronal migration by direct transcriptional regulation of guidance receptors in postmitotic cells.
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