GSK3 and Lamellipodin balance lamellipodial protrusions and focal adhesion maturation in mouse neural crest migration

GSK3 and Lamellipodin balance lamellipodial protrusions and focal adhesion maturation in mouse neural crest migration
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GSK3 和 Lamellipodin 平衡小鼠神经嵴迁移中的板状足突起和粘着斑成熟

DOI:
10.1101/2022.12.23.521694
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发表时间:
2022
期刊:
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通讯作者:
Dobson L
Dobson L
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作者:
Dobson L

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神经脊细胞是从神经上皮剥离的多能细胞,在整个胚胎中迁移。异常迁移会导致发育缺陷。动物模型正在提高我们对神经脊异常的理解,但对存活迁移行为的理解却很少。在这里,我们证明了小鼠神经脊细胞在体内显示了以肌动蛋白为基础的片状脂蛋白和丝状二氢叶酸。利用神经脊特异的基因敲除或抑制剂,我们发现丝氨酸-苏氨酸激酶糖原合成酶-3(GSK3)和细胞骨架调节剂lamellipdin(LPD)在防止局部粘连成熟的同时,是形成片状脂蛋白所必需的。LPD是GSK3的底物,LPD的磷酸化有利于与SCAR/WAVE复合体(片状脂膜形成)的相互作用,而牺牲了VASP和MENA的相互作用(黏附成熟和丝足形成)。这种对哺乳动物神经脊迁移中细胞骨架调节的更好的理解对神经脊异常和癌症具有普遍的意义。
Neural crest cells are multipotent cells that delaminate from the neuroepithelium, migrating throughout the embryo. Aberrant migration causes developmental defects. Animal models are improving our understanding of neural crest anomalies, butin vivomigration behaviors are poorly understood. Here, we demonstrate that murine neural crest cells display actin-based lamellipodia and filopodiain vivo. Using neural crest-specific knockouts or inhibitors, we show that the serine-threonine kinase glycogen synthase kinase-3 (GSK3) and the cytoskeletal regulator lamellipodin (Lpd) are required for lamellipodia formation while preventing focal adhesion maturation. Lpd is a substrate of GSK3, and phosphorylation of Lpd favors interactions with the Scar/WAVE complex (lamellipodia formation) at the expense of VASP and Mena interactions (adhesion maturation and filopodia formation). This improved understanding of cytoskeletal regulation in mammalian neural crest migration has general implications for neural crest anomalies and cancer.
细胞迁移的基于丝状的接触刺激驱动组织形态发生。
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