Oligodendroglial excitability mediated by glutamatergic inputs and Nav1.2 activation.

Oligodendroglial excitability mediated by glutamatergic inputs and Nav1.2 activation.
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DOI:
10.1038/s41467-017-00688-0
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发表时间:
2017-09-15
影响因子:
16.6
通讯作者:
Kim JH
Kim JH
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Berret E;Barron T;Xu J;Debner E;Kim EJ;Kim JH

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少突胶质细胞(OL)的成熟和轴突-神经胶质细胞的通讯是发育中的大脑中适当髓鞘形成所必需的。然而,OL的生理特性在不同的大脑区域中仍然很大程度上未被表征。少突胶质细胞电压激活的Na+通道(Nav)和电兴奋性在髓鞘形成阶段的成熟中的作用是有争议的,尽管少突胶质细胞的兴奋性对促进轴突髓鞘形成可能是重要的。在这里,我们显示尖峰特性的OLs和它们的作用,在听觉脑干的轴突神经胶质细胞通信。髓鞘形成前OL(pre-OL)的亚群可以在整个出生后发育到成年早期产生Nav1.2驱动的动作电位。此外,可兴奋的前OL从触发前OL尖峰的邻近神经元接收神经元能输入。敲低前OL中的Nav1.2通道改变其形态,减少轴突-OL相互作用并损害髓鞘形成。我们的研究结果表明,Nav1.2驱动的尖峰的前OL是轴突-胶质细胞通信的一个组成部分,并需要的功能和成熟的OL,以促进髓鞘形成。轴突-胶质细胞通讯对髓鞘形成很重要。在这里,作者表明,在大鼠出生后发育期间,听觉脑干中的髓鞘形成前少突胶质细胞亚群接收兴奋性输入,并可以产生Nav1.2驱动的动作电位,并且这种过程促进髓鞘形成。
Oligodendrocyte (OL) maturation and axon-glial communication are required for proper myelination in the developing brain. However, physiological properties of OLs remain largely uncharacterized in different brain regions. The roles of oligodendroglial voltage-activated Na+ channels (Nav) and electrical excitability in relation to maturation to the myelinating stage are controversial, although oligodendroglial excitability is potentially important for promoting axon myelination. Here we show spiking properties of OLs and their role in axon-glial communication in the auditory brainstem. A subpopulation of pre-myelinating OLs (pre-OLs) can generate Nav1.2-driven action potentials throughout postnatal development to early adulthood. In addition, excitable pre-OLs receive glutamatergic inputs from neighboring neurons that trigger pre-OL spikes. Knockdown of Nav1.2 channels in pre-OLs alters their morphology, reduces axon-OL interactions and impairs myelination. Our results suggest that Nav1.2-driven spiking of pre-OLs is an integral component of axon-glial communication and is required for the function and maturation of OLs to promote myelination. Axon-glial communication is important for myelination. Here the authors show that during postnatal development in rats, a subpopulation of pre-myelinating oligodendrocytes in the auditory brainstem receive excitatory inputs and can generate Nav 1.2-driven action potentials, and that such process promotes myelination.
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发表时间: 2010-03-10
期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子: --
作者:
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