The ventral hippocampus is the embryonic origin for adult neural stem cells in the dentate gyrus.

The ventral hippocampus is the embryonic origin for adult neural stem cells in the dentate gyrus.
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DOI:
10.1016/j.neuron.2013.03.019
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发表时间:
2013-05-22
期刊:
影响因子:
16.2
通讯作者:
Pleasure SJ
Pleasure SJ
中科院分区:
医学1区
文献类型:
--
作者:
Li G;Fang L;Fernández G;Pleasure SJ

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成体神经发生是齿状回中一种独特的可塑性,需要长寿命神经干细胞(LL-NSCs)的存在。然而,这些LL-NSCs的胚胎起源尚不清楚。流行的模型假设贯穿海马体纵轴的齿状神经上皮产生LL-NSCs和胚胎产生的颗粒神经元。在这里,我们发现神经干细胞最初起源于妊娠晚期的腹侧海马区,然后重新定位到背侧海马区。这些细胞的后代是颗粒下带(SGZ)中LL-NSCs的来源。此外,我们发现这些细胞的起源和它们在齿状体内的维持受不同来源的Sonic Hedgehog(Shh)的控制。揭示了海马区LL-NSCs胚胎起源和Shh来源的复杂性,对研究成体海马区LL-NSCs的功能具有重要意义。
Adult neurogenesis represents a unique form of plasticity in the dentate gyrus requiring the presence of long-lived neural stem cells (LL-NSCs). However, the embryonic origin of these LL-NSCs remains unclear. The prevailing model assumes that the dentate neuroepithelium throughout the longitudinal axis of the hippocampus generates both the LL-NSCs and embryonically produced granule neurons. Here we show that the NSCs initially originate from the ventral hippocampus during late gestation and then relocate into the dorsal hippocampus. The descendants of these cells are the source for the LL-NSCs in the subgranular zone (SGZ). Furthermore, we show that the origin of these cells and their maintenance in the dentate are controlled by distinct sources of Sonic Hedgehog (Shh). The revelation of the complexity of both the embryonic origin of hippocampal LL-NSCs and the sources of Shh has important implications for the functions of LL-NSCs in the adult hippocampus.
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