The Purkinje neuron acts as a central regulator of spatially and functionally distinct cerebellar precursors.

The Purkinje neuron acts as a central regulator of spatially and functionally distinct cerebellar precursors.
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DOI:
10.1016/j.devcel.2013.10.008
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发表时间:
2013-11-11
期刊:
影响因子:
11.8
通讯作者:
Chiang C
Chiang C
中科院分区:
生物学1区
文献类型:
--
作者:
Fleming JT;He W;Hao C;Ketova T;Pan FC;Wright CC;Litingtung Y;Chiang C

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新生小脑中的预期白色物质(PWM)包含一个短暂的生发区室,产生所有出生后的GABA能抑制性中间神经元和星形胶质细胞。然而,很少有人知道的分子身份和发展潜力的居民祖细胞,或关键的监管生态位信号。在这里,我们发现神经干细胞样的初级祖细胞(TncYFP-低CD 133+)产生中间星形胶质细胞(TncYFP-低CD 15+)前体和GABA能瞬时扩增(Ptf 1a+)细胞。有趣的是,这些线性相关但功能不同的祖细胞通常对Sonic hedgehog(Shh)有反应,并且在TNCYFP低细胞中的接收阻断减弱了PWM中的增殖,减少了两种中间祖细胞类别。此外,我们表明,嘘产生的遥远的浦肯野神经元保持PWM生态位独立的经典作用,在调节颗粒细胞前体细胞增殖。总的来说,我们的研究表明浦肯野神经元保持双向信号轴,驱动空间和功能上相反的抑制性和兴奋性中间神经元的产生,这对运动学习和认知很重要。
The prospective white matter (PWM) in the nascent cerebellum contains a transient germinal compartment that produces all postnatally-born GABAergic inhibitory interneurons and astrocytes. However, little is known regarding the molecular identity and developmental potential of resident progenitors, or key regulatory niche signals. Here we show that neural stem cell-like primary progenitors (TncYFP-low CD133+) generate intermediate astrocyte (TncYFP-low CD15+) precursors and GABAergic transient amplifying (Ptf1a+) cells. Interestingly, these lineally-related, but functionally divergent progenitors commonly respond to Sonic hedgehog (Shh), and blockade of reception in TNCYFP-low cells attenuates proliferation in the PWM, reducing both intermediate progenitor classes. Furthermore, we show that Shh produced from distant Purkinje neurons maintains the PWM niche independent of its classical role in regulating granule cell precursor proliferation. Collectively, our study indicates Purkinje neurons maintain a bi-directional signaling axis, driving the production of spatially and functionally opposed inhibitory and excitatory interneurons important for motor learning and cognition.
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