LMO4 controls the balance between excitatory and inhibitory spinal V2 interneurons.

LMO4 controls the balance between excitatory and inhibitory spinal V2 interneurons.
复制标题

DOI:
10.1016/j.neuron.2009.02.011
复制
发表时间:
2009-03-26
期刊:
影响因子:
16.2
通讯作者:
Lee, Soo-Kyung
Lee, Soo-Kyung
中科院分区:
医学1区
文献类型:
--
作者:
Joshi, Kaumudi;Lee, Seunghee;Lee, Bora;Lee, Jae W.;Lee, Soo-Kyung

文献摘要

参考文献

被引文献

相似文献

在脊髓腹侧,多个兴奋性和抑制性中间神经元与运动神经元一起形成运动回路。Notch信号传导启动未成熟V2-中间神经元分化为兴奋性V2 a-中间神经元和抑制性V2 b-中间神经元。在这里,我们提供了一个转录调控机制,其平衡生产。仅LIM蛋白LMO 4通过反向调节V2 a和V2 b特异性LIM复合物的活性来控制这种二元细胞命运选择。在脊髓中,LMO 4与SCL协作诱导GABA能V2 b-中间神经元,并抑制Lhx 3产生GABA能V2 a-中间神经元。在LMO 4;SCL复合突变体胚胎中,V2 a-中间神经元以V2 b-中间神经元为代价显著增加。我们进一步证明,LMO 4成核的一种新的LIM复合物含有SCL,Gata 2和NLI的组装。该复合物激活V2 b基因中的特异性增强子,其由SCL和Gata 2的结合位点组成,从而促进V2 b-中间神经元的命运。因此,L0 M4在指导腹侧脊髓中抑制性和兴奋性神经元的平衡产生中起重要作用。
Multiple excitatory and inhibitory interneurons form the motor circuit with motor neurons in the ventral spinal cord. Notch signaling initiates the diversification of immature V2-interneurons into excitatory V2a-interneurons and inhibitory V2b-interneurons. Here we provide a transcriptional regulatory mechanism underlying their balanced production. LIM-only protein LMO4 controls this binary cell fate choice by regulating the activity of V2a- and V2b-specific LIM-complexes inversely. In the spinal cord, LMO4 induces GABAergic V2b-interneurons in collaboration with SCL and inhibits Lhx3 from generating glutamatergic V2a-interneuons. In LMO4;SCL compound mutant embryos, V2a-interneurons increase markedly at the expense of V2b-interneurons. We further demonstrate that LMO4 nucleates the assembly of a novel LIM-complex containing SCL, Gata2 and NLI. This complex activates specific enhancers in V2b-genes consisting of binding sites for SCL and Gata2, thereby promoting V2b-interneuron fate. Thus, LOM4 plays essential roles in directing a balanced generation of inhibitory and excitatory neurons in the ventral spinal cord.
DOI: 10.1242/dev.024802
发表时间: 2008-09-15
期刊: DEVELOPMENT
影响因子: 4.6
作者:
Kimura, Yukiko;Satou, Chie;Higashijima, Shin-ichi
通讯作者: Higashijima, Shin-ichi
DOI: 10.1073/pnas.212532399
发表时间: 2002-10-29
影响因子: 11.1
作者:
Chen, L;Segal, D;Westphal, H
通讯作者: Westphal, H
DOI: 10.1111/j.1460-9568.2007.05906.x
发表时间: 2007-12-01
影响因子: 3.4
作者:
Lundfald, Line;Restrepo, C. Ernesto;Kiehn, Ole
通讯作者: Kiehn, Ole
DOI: 10.1242/dev.02167
发表时间: 2005-12-01
期刊: DEVELOPMENT
影响因子: 4.6
作者:
Glasgow, SM;Henkel, RM;Johnson, JE
通讯作者: Johnson, JE
DOI: 10.1101/gad.1628008
发表时间: 2008-01-15
影响因子: 10.5
作者:
Hori, Kei;Cholewa-Waclaw, Justyna;Johnson, Jane E.
通讯作者: Johnson, Jane E.