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Ablation of neuronal ADAM17 impairs oligodendrocyte differentiation and myelination.
Glia ( IF 5.4 ) Pub Date : 2019-12-18 , DOI: 10.1002/glia.23765
Evelien Fredrickx 1 , Elisa Colombo 1 , Paolo Canevazzi 1 , Rosa La Marca 1 , Marta Pellegatta 1 , Giorgia Dina 1 , Paola Podini 1 , Klaus A Nave 2 , Angelo Quattrini 1 , Carla Taveggia 1
Affiliation  

Myelin, one of the most important adaptations of vertebrates, is essential to ensure efficient propagation of the electric impulse in the nervous system and to maintain neuronal integrity. In the central nervous system (CNS), the development of oligodendrocytes and the process of myelination are regulated by the coordinated action of several positive and negative cell-extrinsic factors. We and others previously showed that secretases regulate the activity of proteins essential for myelination. We now report that the neuronal α-secretase ADAM17 controls oligodendrocyte differentiation and myelin formation in the CNS. Ablation of Adam17 in neurons impairs in vivo and in vitro oligodendrocyte differentiation, delays myelin formation throughout development and results in hypomyelination. Furthermore, we show that this developmental defect is, in part, the result of altered Notch/Jagged 1 signaling. Surprisingly, in vivo conditional loss of Adam17 in immature oligodendrocytes has no effect on myelin formation. Collectively, our data indicate that the neuronal α-secretase ADAM17 is required for proper CNS myelination. Further, our studies confirm that secretases are important post-translational regulators of myelination although the mechanisms controlling CNS and peripheral nervous system (PNS) myelination are distinct.

中文翻译:

神经元 ADAM17 的消融会损害少突胶质细胞分化和髓鞘形成。

髓磷脂是脊椎动物最重要的适应性之一,对于确保电脉冲在神经系统中的有效传播和维持神经元完整性至关重要。在中枢神经系统 (CNS) 中,少突胶质细胞的发育和髓鞘形成过程受多种正负细胞外因素的协同作用调节。我们和其他人以前表明,分泌酶调节对髓鞘形成必不可少的蛋白质的活性。我们现在报告神经元 α-分泌酶 ADAM17 控制中枢神经系统中的少突胶质细胞分化和髓鞘形成。神经元中 Adam17 的消融会损害体内和体外少突胶质细胞的分化,在整个发育过程中延迟髓鞘形成并导致髓鞘形成不足。此外,我们表明这种发育缺陷部分是 Notch/Jagged 1 信号改变的结果。令人惊讶的是,未成熟少突胶质细胞中 Adam17 的体内条件性丢失对髓鞘形成没有影响。总的来说,我们的数据表明神经元α-分泌酶 ADAM17 是正确的 CNS 髓鞘形成所必需的。此外,我们的研究证实,尽管控制 CNS 和外周神经系统 (PNS) 髓鞘形成的机制不同,但分泌酶是髓鞘形成的重要翻译后调节剂。
更新日期:2019-12-18
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