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发表于 2017-11-30 21:17:38
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软件译:
星形胶质细胞神经元素控制星形胶质细胞的形态发生和突触发生
Jeff A. Stogsdill,胡安拉米雷斯,迪刘,Yong Yong Kim,凯瑟琳·T·鲍德温,Eray Enustun,Tiffany Ejikeme,如荣吉 &Cagla Eroglu
自然 551,192 - 197(2017年09月)
doi:10.1038 / nature24638
星形胶质细胞细胞粘附胶着的发展突触发育
收稿日期:
2017年4月10日
公认:
2017年10月17日
在线发布:
2017年11月8日
抽象
星形胶质细胞是复杂的神经胶质细胞,具有许多浸润神经毡细胞并与突触相互作用的细胞过程。控制星形胶质细胞形态建立的机制是未知的,目前还不清楚是否削弱星形胶质细胞浸润的neuropil改变突触连接。在这里,我们表明,小鼠皮层中的星形胶质细胞形态发生取决于直接接触神经元的过程,并与突触电路的增长和活动平行发生。neuroligin家族细胞粘附蛋白NL1,NL2和NL3,由皮质星形胶质细胞表达,通过与神经元neurexins相互作用控制星形胶质细胞的形态发生。此外,在星形细胞NL2 absence不在 的情况下,皮质兴奋性突触的形成和功能减弱,而抑制性突触功能增强。我们的研究结果突出了以前未描述的作用机制的neuroligins和链接星形胶质细胞形态发生突触。由于neuroligin突变已牵涉到各种神经疾病,这些发现也指向基于星形胶质细胞的神经病理学机制。
Abstract
Astrocytes are complex glial cells with numerous fine cellular processes that infiltrate the neuropil and interact with synapses. The mechanisms that control the establishment of astrocyte morphology are unknown, and it is unclear whether impairing astrocytic infiltration of the neuropil alters synaptic connectivity. Here we show that astrocyte morphogenesis in the mouse cortex depends on direct contact with neuronal processes and occurs in parallel with the growth and activity of synaptic circuits. The neuroligin family cell adhesion proteins NL1, NL2, and NL3, which are expressed by cortical astrocytes, control astrocyte morphogenesis through interactions with neuronal neurexins. Furthermore, in the absence of astrocytic NL2, the formation and function of cortical excitatory synapses are diminished, whereas inhibitory synaptic function is enhanced. Our findings highlight a previously undescribed mechanism of action for neuroligins and link astrocyte morphogenesis to synaptogenesis. Because neuroligin mutations have been implicated in various neurological disorders, these findings also point towards an astrocyte-based mechanism of neural pathology.
https://www.nature.com/articles/nature24638
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