Intermediate Cells of Dual Embryonic Origin Follow a Basal to Apical Gradient of Ingression Into the Lateral Wall of the Cochlea.

Intermediate Cells of Dual Embryonic Origin Follow a Basal to Apical Gradient of Ingression Into the Lateral Wall of the Cochlea.
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DOI:
10.3389/fcell.2022.867153
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发表时间:
2022
影响因子:
5.5
通讯作者:
Basch ML
Basch ML
中科院分区:
生物学2区
文献类型:
--
作者:
Renauld JM;Khan V;Basch ML

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血管纹的中间细胞是神经嵴来源的黑素细胞。它们对于在内耳中建立耳蜗内电位是必不可少的,该电位允许机械感觉毛细胞将声音转换为神经冲动。尽管它们对正常听力很重要,但这些细胞如何发育并迁移到耳蜗外侧壁的位置尚未研究。我们发现早在E10.5,第VIII神经节中的一些雪旺细胞前体开始表达黑素细胞特异性标记,而神经嵴来源的成黑素细胞迁移到耳泡中。在胚胎发育过程中,成黑素细胞和雪旺细胞前体起源的中间细胞进入耳蜗的侧壁,从E15.5左右开始,遵循基底到顶端的梯度,并在出生后继续增殖。
Intermediate cells of the stria vascularis are neural crest derived melanocytes. They are essential for the establishment of the endocochlear potential in the inner ear, which allows mechanosensory hair cells to transduce sound into nerve impulses. Despite their importance for normal hearing, how these cells develop and migrate to their position in the lateral wall of the cochlea has not been studied. We find that as early as E10.5 some Schwann cell precursors in the VIIIth ganglion begin to express melanocyte specific markers while neural crest derived melanoblasts migrate into the otic vesicle. Intermediate cells of both melanoblast and Schwann cell precursor origin ingress into the lateral wall of the cochlea starting at around E15.5 following a basal to apical gradient during embryonic development, and continue to proliferate postnatally.
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