Patterned assembly and neurogenesis in the chick dorsal root ganglion.

Patterned assembly and neurogenesis in the chick dorsal root ganglion.
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DOI:
10.1002/cne.22248
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发表时间:
2010-02-15
期刊:
The Journal of comparative neurology
影响因子:
--
通讯作者:
Lefcort F
Lefcort F
中科院分区:
其他
文献类型:
--
作者:
George L;Kasemeier-Kulesa J;Nelson BR;Koyano-Nakagawa N;Lefcort F

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介导疼痛和热感受的小直径TrkA+神经元的诞生在神经嵴细胞从驻留在新生背根神经节中的祖细胞迁移停止后约24小时开始。虽然已经提出了多个地理上不同的祖细胞池,这项研究是第一个全面表征小直径神经元的衍生。在发育中的鸡胚中,我们确定了神经嵴细胞迁移和定植的新模式,这些新模式将初期神经节雕刻成由一层增殖祖细胞包裹的有丝分裂后神经元核心。此外,我们发现,这个外祖细胞层是由三个空间,时间和分子上不同的祖细胞区,其中两个产生不同的人口TrkA+神经元。
The birth of small-diameter TrkA+ neurons that mediate pain and thermo reception begins approximately 24 hours after the cessation of neural crest cell migration from progenitors residing in the nascent dorsal root ganglion. Although multiple geographically distinct progenitor pools have been proposed, this study is the first to comprehensively characterize the derivation of small diameter neurons. In the developing chick embryo, we identify novel patterns in neural crest cell migration and colonization that sculpt the incipient ganglion into a post-mitotic neuronal core encapsulated by a layer of proliferative progenitor cells. Furthermore, we show that this outer progenitor layer is composed of three spatially, temporally, and molecularly distinct progenitor zones, two of which give rise to distinct populations of TrkA+ neurons.
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