Gene co-regulation by Fezf2 selects neurotransmitter identity and connectivity of corticospinal neurons.

Gene co-regulation by Fezf2 selects neurotransmitter identity and connectivity of corticospinal neurons.
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DOI:
10.1038/nn.3757
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发表时间:
2014-08
影响因子:
25
通讯作者:
Arlotta, Paola
Arlotta, Paola
中科院分区:
医学1区
文献类型:
--
作者:
Lodato, Simona;Molyneaux, Bradley J.;Zuccaro, Emanuela;Goff, Loyal A.;Chen, Hsu-Hsin;Yuan, Wen;Meleski, Alyssa;Takahashi, Emi;Mahony, Shaun;Rinn, John L.;Gifford, David K.;Arlotta, Paola

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新皮质包含着种类繁多的神经元亚型,每种亚型都由独特的特征所定义,这些特征是在亚型特异性基因和泛神经元基因的控制下在发育过程中获得的。对于任何一类皮质神经元,协调这些独特基因组合表达的调控逻辑都是未知的。在此,我们报道Fezf2是一个选择基因,能够调控基因集的表达,这些基因集共同定义了小鼠皮质脊髓运动神经元(CSMN)。我们发现Fezf2通过激活Vglut1(Scl17a7)直接诱导CSMN的谷氨酸能特性,并通过抑制Gad1的转录来抑制γ-氨基丁酸能命运。此外,我们确定轴突导向受体Ephb1是Fezf2的一个靶标,对执行皮质脊髓束的同侧延伸是必需的。我们的数据表明,由单个转录因子对神经元亚型特异性基因和泛神经元基因组进行协同调控的表达是负责建立CSMN特性的调控逻辑的一个组成部分。
The neocortex contains an unparalleled diversity of neuronal subtypes, each defined by distinct traits that are developmentally acquired under the control of subtype-specific and pan-neuronal genes. The regulatory logic that orchestrates the expression of these unique combinations of genes is unknown for any class of cortical neuron. Here, we report that Fezf2 is a selector gene able to regulate the expression of gene sets that collectively define mouse corticospinal motor neurons (CSMN). We find that Fezf2 directly induces the glutamatergic identity of CSMN via activation of Vglut1 (Scl17a7) and inhibits a GABAergic fate by repressing transcription of Gad1. In addition, we identify the axon guidance receptor Ephb1 as a target of Fezf2 necessary to execute the ipsilateral extension of the corticospinal tract. Our data indicate that co-regulated expression of neuron subtype–specific and pan-neuronal gene batteries by a single transcription factor is one component of the regulatory logic responsible for the establishment of CSMN identity.
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