Neuropilin-1 interacts with the second branchial arch microenvironment to mediate chick neural crest cell dynamics.

Neuropilin-1 interacts with the second branchial arch microenvironment to mediate chick neural crest cell dynamics.
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DOI:
10.1002/dvdy.22303
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发表时间:
2010-06
影响因子:
2.5
通讯作者:
Kulesa, Paul M.
Kulesa, Paul M.
中科院分区:
生物学3区
文献类型:
--
作者:
McLennan, Rebecca;Kulesa, Paul M.

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颅神经嵴细胞(NCCs)需要神经纤毛蛋白信号到达并侵入鳃弓。在这里,我们使用在体内鸡模型,以调查是否neuropilin-1敲低表型是特定的第二鳃弓(ba 2),在NCC行为和表型后果的变化,以及是否neuropilins一起工作,以促进进入和入侵ba 2。我们发现,脑NCC与减少neuropilin-1的表达表现出较短的突起和减少的细胞体和核的长度与宽度的比例的极性和运动性的损失的特点,后与ba 2的特定的相互作用。将转染细胞移植到年轻宿主的菱形体4中,可挽救定向NCC迁移。最后,通过shRNA单独或与减少神经纤毛蛋白-1表达一起减少神经纤毛蛋白-2表达并不导致更强的头部表型。因此,NCC,独立的菱形起源,需要神经纤毛蛋白-1,但不neuropilin-2,以保持极性和定向迁移到ba 2。
Cranial neural crest cells (NCCs) require neuropilin signaling to reach and invade the branchial arches. Here, we use an in vivo chick model to investigate whether the neuropilin-1 knockdown phenotype is specific to the second branchial arch (ba2), changes in NCC behaviors and phenotypic consequences, and whether neuropilins work together to facilitate entry into and invasion of ba2. We find that cranial NCCs with reduced neuropilin-1 expression displayed shorter protrusions and decreased cell body and nuclear length-to-width ratios characteristic of a loss in polarity and motility, after specific interaction with ba2. Directed NCC migration was rescued by transplantation of transfected cells into rhombomere 4 of younger hosts. Lastly, reduction of neuropilin-2 expression by shRNA either solely or with reduction of neuropilin-1 expression did not lead to a stronger head phenotype. Thus, NCCs, independent of rhombomere origin, require neuropilin-1, but not neuropilin-2 to maintain polarity and directed migration into ba2.
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