Prospective identification and purification of quiescent adult neural stem cells from their in vivo niche.

Prospective identification and purification of quiescent adult neural stem cells from their in vivo niche.
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DOI:
10.1016/j.neuron.2014.02.039
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发表时间:
2014-05-07
期刊:
影响因子:
16.2
通讯作者:
Doetsch F
Doetsch F
中科院分区:
医学1区
文献类型:
--
作者:
Codega P;Silva-Vargas V;Paul A;Maldonado-Soto AR;Deleo AM;Pastrana E;Doetsch F

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成体神经源性龛藏着静止的神经干细胞,然而它们在体内的身份一直难以捉摸。在这里,我们前瞻性地分离GFAP+ CD 133+(静止神经干细胞,qNSCs)和GFAP+ CD 133 +EGFR+(激活神经干细胞,aNSCs)从成人脑室-脑室下区。aNSC是快速循环的,在体内高度神经原性的,并且在体外富集集落形成细胞。相比之下,qNSC在体内大部分处于休眠状态,以较慢的动力学产生嗅球中间神经元,并且很少在体外形成集落。此外,qNSC是Nestin阴性的,Nestin是广泛用于神经干细胞的标志物。在激活后,qNSC上调巢蛋白和EGFR,并变得高度增殖。值得注意的是,qNSC和aNSC可以在体外相互转化。转录组分析表明,qNSCs与来自其他器官的静止干细胞具有共同特征。最后,小分子筛选鉴定了GPCR配体S1 P和PGD 2作为积极维持qNSC静止状态的因子。
Adult neurogenic niches harbor quiescent neural stem cells, however their in vivo identity has been elusive. Here, we prospectively isolate GFAP+CD133+ (quiescent neural stem cells, qNSCs) and GFAP+CD133+EGFR+ (activated neural stem cells, aNSCs) from the adult ventricular-subventricular zone. aNSCs are rapidly cycling, highly neurogenic in vivo and enriched in colony-forming cells in vitro. In contrast, qNSCs are largely dormant in vivo, generate olfactory bulb interneurons with slower kinetics, and only rarely form colonies in vitro. Moreover, qNSCs are Nestin-negative, a marker widely used for neural stem cells. Upon activation, qNSCs upregulate Nestin and EGFR, and become highly proliferative. Notably, qNSCs and aNSCs can interconvert in vitro. Transcriptome analysis reveals that qNSCs share features with quiescent stem cells from other organs. Finally, small molecule screening identified the GPCR ligands, S1P and PGD2, as factors that actively maintain the quiescent state of qNSCs.
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