Adult SVZ stem cells lie in a vascular niche: a quantitative analysis of niche cell-cell interactions.

Adult SVZ stem cells lie in a vascular niche: a quantitative analysis of niche cell-cell interactions.
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DOI:
10.1016/j.stem.2008.07.026
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发表时间:
2008-09-11
期刊:
影响因子:
23.9
通讯作者:
Temple S
Temple S
中科院分区:
医学1区
文献类型:
--
作者:
Shen Q;Wang Y;Kokovay E;Lin G;Chuang SM;Goderie SK;Roysam B;Temple S

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有一个新兴的理解的重要性,血管系统内干细胞壁龛。在这里,我们研究是否神经干细胞(NSCs)在成人脑室下区(SVZ)靠近血管,使用三维整体,共聚焦显微镜和自动化的计算机图像定量。我们发现SVZ包含丰富的血管丛,这些血管沿着和在成神经细胞链内蜿蜒。表达干细胞标志物(包括GFAP和增殖标志物)的细胞与血管内皮细胞周围含层粘连蛋白的细胞外基质(ECM)紧密贴壁。顶端GFAP+细胞混合在室管膜层内,并且在心室和血管之间有一定的跨度,占据专门的微环境。成人SVZ祖细胞表达层粘连蛋白受体α 6 β 1整联蛋白,阻断该受体可抑制其与内皮细胞的粘附,改变其在体内的位置和增殖,表明其在血管龛内结合SVZ干细胞中起功能性作用。
There is an emerging understanding of the importance of the vascular system within stem cell niches. Here we examine whether neural stem cells (NSCs) in the adult subventricular zone (SVZ) lie close to blood vessels, using 3-dimensional wholemounts, confocal microscopy and automated computer-based image quantification. We found that the SVZ contains a rich plexus of blood vessels that snake along and within neuroblast chains. Cells expressing stem cell markers, including GFAP, and proliferation markers, are closely apposed to the laminin-containing extracellular matrix (ECM) surrounding vascular endothelial cells. Apical GFAP+ cells are admixed within the ependymal layer and some span between the ventricle and blood vessels, occupying a specialized microenvironment. Adult SVZ progenitor cells express the laminin receptor alpha6beta1 integrin, and blocking this inhibits their adhesion to endothelial cells, altering their position and proliferation in vivo, indicating it plays a functional role in binding SVZ stem cells within the vascular niche.
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