KIF20A/MKLP2 regulates the division modes of neural progenitor cells during cortical development.

KIF20A/MKLP2 regulates the division modes of neural progenitor cells during cortical development.
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DOI:
10.1038/s41467-018-05152-1
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发表时间:
2018-07-13
影响因子:
16.6
通讯作者:
Lu Q
Lu Q
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Geng A;Qiu R;Murai K;Liu J;Wu X;Zhang H;Farhoodi H;Duong N;Jiang M;Yee JK;Tsark W;Lu Q

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神经前体细胞(NPC)的平衡对称和不对称分裂对大脑发育至关重要,但其潜在机制尚未完全了解。在这里,我们报告,有丝分裂驱动蛋白KIF 20 A/MKLP 2与RGS 3相互作用,并在皮层神经发生过程中控制NPC的分裂模式中起着至关重要的作用。NPC中KIF 20 A的敲除会导致RGS 3从细胞间桥(ICB)中脱位,损害Ephrin-B-RGS细胞命运信号复合物的功能,并导致从增殖分裂向分化分裂的转变。KIF 20 A的种系和诱导型敲除导致祖细胞和神经元的损失,并导致皮质变薄和脑室扩大。有趣的是,KIF 20 A功能的丧失诱导早期细胞周期退出和早熟神经元分化,而不引起实质性的胞质分裂缺陷或凋亡。我们的研究结果确定了RGS-KIF 20 A轴在细胞分裂的调节,并提出了一个潜在的联系,ICB调节细胞命运的决定。神经祖细胞的分裂受到密切调控,但如何调控尚不清楚。在这里,作者表明,有丝分裂驱动蛋白KIF 20 A/MKLP 2与神经祖细胞中G蛋白信号转导RGS 3的调节因子相互作用,将其从分裂皮质细胞的细胞间桥中驱逐。
Balanced symmetric and asymmetric divisions of neural progenitor cells (NPCs) are crucial for brain development, but the underlying mechanisms are not fully understood. Here we report that mitotic kinesin KIF20A/MKLP2 interacts with RGS3 and plays a crucial role in controlling the division modes of NPCs during cortical neurogenesis. Knockdown of KIF20A in NPCs causes dislocation of RGS3 from the intercellular bridge (ICB), impairs the function of Ephrin-B–RGS cell fate signaling complex, and leads to a transition from proliferative to differentiative divisions. Germline and inducible knockout of KIF20A causes a loss of progenitor cells and neurons and results in thinner cortex and ventriculomegaly. Interestingly, loss of function of KIF20A induces early cell cycle exit and precocious neuronal differentiation without causing substantial cytokinesis defect or apoptosis. Our results identify a RGS–KIF20A axis in the regulation of cell division and suggest a potential link of the ICB to regulation of cell fate determination. The division of neural progenitors is closely regulated but how is unclear. Here, the authors show that mitotic kinesin KIF20A/MKLP2 interacts with a regulator of G protein signaling RGS3 in neural progenitor cells, dislodging it from the intercellular bridge of dividing cortical cells.
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