Calcineurin/NFAT signaling is required for neuregulin-regulated Schwann cell differentiation.

Calcineurin/NFAT signaling is required for neuregulin-regulated Schwann cell differentiation.
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DOI:
10.1126/science.1166562
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发表时间:
2009-01-30
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Crabtree GR
Crabtree GR
中科院分区:
其他
文献类型:
--
作者:
Kao SC;Wu H;Xie J;Chang CP;Ranish JA;Graef IA;Crabtree GR

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许旺细胞从多能神经嵴细胞发育而来,并在轴突周围形成髓鞘,从而允许动作电位的快速传递。神经调节蛋白信号通过ErbB受体调节许旺细胞的发育;然而,下游途径尚未完全确定。我们发现神经嵴中缺乏钙调磷酸酶B1的小鼠在雪旺细胞分化和髓鞘形成方面存在缺陷。神经调节蛋白除了雪旺氏细胞前体启动细胞质Ca 2+的增加,激活钙调磷酸酶和下游转录因子NFATc 3和c4。NFAT蛋白复合物的纯化表明,Sox 10是NFAT核伴侣,并与NFATc 4协同激活Krox 20,其调节髓鞘形成所必需的基因。我们的研究表明,钙调磷酸酶和NFAT是必不可少的neuregulin和ErbB信号,神经嵴多样化,和雪旺细胞的分化。
Schwann cells develop from multipotent neural crest cells and form myelin sheaths around axons that allow rapid transmission of action potentials. Neuregulin signaling through the ErbB receptor regulates Schwann cell development; however, the downstream pathways are not fully defined. We find that mice lacking calcineurin B1 in the neural crest have defects in Schwann cell differentiation and myelination. Neuregulin addition to Schwann cell precursors initiates an increase in cytoplasmic Ca2+, which activates calcineurin and the downstream transcription factors NFATc3 and c4. Purification of NFAT protein complexes shows that Sox10 is an NFAT nuclear partner and synergizes with NFATc4 to activate Krox20, which regulates genes necessary for myelination. Our studies demonstrate that calcineurin and NFAT are essential for neuregulin and ErbB signaling, neural crest diversification, and differentiation of Schwann cells.
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