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首页> 外文期刊>The European Journal of Neuroscience >Gap junction-mediated calcium waves define communication networks among murine postnatal neural progenitor cells.
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Gap junction-mediated calcium waves define communication networks among murine postnatal neural progenitor cells.

机译:间隙连接介导的钙波定义了鼠出生后神经祖细胞之间的通信网络。

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In the postnatal neurogenic niche, two populations of astrocyte-like cells (B cells) persist, one acting as neural progenitor cells (NPCs, B1 cells) and one forming a structural boundary between the neurogenic niche and the striatum (B2 cells, niche astrocytes). Despite being viewed as two distinct entities, we found that B1 and B2 cells express the gap junction protein connexin 43 and display functional coupling involving 50-60 cells. Using neonatal electroporation to label slowly cycling radial glia-derived B1 cells, which send a basal process onto blood vessels, we further confirmed dye coupling between NPCs. To assess the functionality of the coupling, we used calcium imaging in a preparation preserving the three-dimensional architecture of the subventricular zone. Intercellular calcium waves were observed among B cells. These waves travelled bidirectionally between B1 and B2 cells and propagated on blood vessels. Inter-B-cell calcium waves were absent in the presence of a gap junction blocker but persisted with purinergic receptor blockers. These findings show that privileged microdomains of communication networks exist among NPCs and niche astrocytes. Such functional coupling between these two cell types suggests that niche astrocytes do not merely have a structural role, but may play an active role in shaping the behavior of NPCs.
机译:在产后神经源性生态位中,持续存在着两类星形胶质细胞样细胞(B细胞),一个作为神经祖细胞(NPC,B1细胞),另一个在神经源性利基和纹状体之间形成结构边界(B2细胞,特殊性星形胶质细胞)。 )。尽管被视为两个不同的实体,我们发现B1和B2细胞表达间隙连接蛋白连接蛋白43,并显示涉及50-60个细胞的功能偶联。使用新生儿电穿孔标记缓慢循环的放射状胶质细胞衍生的B1细胞,该细胞将基础过程发送到血管上,我们进一步证实了NPC之间的染料偶联。为了评估耦合的功能,我们在保留脑室下区域三维结构的制备中使用了钙成像。在B细胞之间观察到细胞间钙波。这些波在B1和B2细胞之间双向传播,并在血管上传播。在间隙连接阻滞剂的存在下不存在B细胞间钙波,但在嘌呤能受体阻滞剂的作用下持续存在。这些发现表明,在NPC和利基星形胶质细胞之间存在通信网络的特权微域。这两种细胞类型之间的这种功能性偶联表明,利基星形胶质细胞不仅具有结构作用,而且在塑造NPC的行为中可能起积极作用。

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