p39-associated Cdk5 activity regulates dendritic morphogenesis.

p39-associated Cdk5 activity regulates dendritic morphogenesis.
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p39 相关的 Cdk5 活性调节树突形态发生

DOI:
10.1038/s41598-020-75264-6
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发表时间:
2020-10-30
期刊:
影响因子:
4.6
通讯作者:
Ip NY
Ip NY
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Ouyang L;Chen Y;Wang Y;Chen Y;Fu AKY;Fu WY;Ip NY

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树突是从神经元胞体延伸而来的分支结构,专门用于处理来自其他神经元的信息。树突状结构的形态发生受到精心安排的信号级联信号的时空调控。这些过程的失调影响神经回路的连接和神经传递的有效性,从而导致神经疾病的发病机制。虽然CDK5(细胞周期蛋白依赖性激酶5)在神经元树突状细胞的发育中起着关键作用,但其潜在的分子调控尚不完全清楚。在这项研究中,我们证明了P39,两个神经元CDK5激活剂之一,是树突状细胞形态发生的关键调节因子。P39缺失的锥体神经元表现出异常的树突形态,其特征是长度较短,树枝减少,这与CDK5缺失神经元中的树突相似。RNA测序分析表明,适配蛋白WDFY1(WD重复和FYVE结构域包含1)作用于CDK5/P39下游,调节树突状细胞的形态发生。虽然WDFY1在P39缺陷神经元中升高,但抑制其表达可以挽救受损的树突分枝。进一步的磷酸蛋白质组学分析表明,CDK5/P39通过调节各种下游信号通路,包括PI3K/Akt-、cAMP-或小GTPase介导的信号转导通路,从而调节细胞骨架组织、蛋白质合成和蛋白质运输,从而介导树突状细胞的形态发生。
Dendrites, branched structures extending from neuronal cell soma, are specialized for processing information from other neurons. The morphogenesis of dendritic structures is spatiotemporally regulated by well-orchestrated signaling cascades. Dysregulation of these processes impacts the wiring of neuronal circuit and efficacy of neurotransmission, which contribute to the pathogeneses of neurological disorders. While Cdk5 (cyclin-dependent kinase 5) plays a critical role in neuronal dendritic development, its underlying molecular control is not fully understood. In this study, we show that p39, one of the two neuronal Cdk5 activators, is a key regulator of dendritic morphogenesis. Pyramidal neurons deficient in p39 exhibit aberrant dendritic morphology characterized by shorter length and reduced arborization, which is comparable to dendrites in Cdk5-deficient neurons. RNA sequencing analysis shows that the adaptor protein, WDFY1 (WD repeat and FYVE domain-containing 1), acts downstream of Cdk5/p39 to regulate dendritic morphogenesis. While WDFY1 is elevated in p39-deficient neurons, suppressing its expression rescues the impaired dendritic arborization. Further phosphoproteomic analysis suggests that Cdk5/p39 mediates dendritic morphogenesis by modulating various downstream signaling pathways, including PI3K/Akt-, cAMP-, or small GTPase-mediated signaling transduction pathways, thereby regulating cytoskeletal organization, protein synthesis, and protein trafficking.
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