Primary dendrites of mitral cells synapse unto neighboring glomeruli independent of their odorant receptor identity

Primary dendrites of mitral cells synapse unto neighboring glomeruli independent of their odorant receptor identity
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二尖瓣细胞的初级树突与邻近肾小球的突触独立于其气味受体的身份

DOI:
10.1038/s42003-018-0252-y
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发表时间:
2019
影响因子:
5.9
通讯作者:
Sakano Hitoshi
Sakano Hitoshi
中科院分区:
生物学2区
文献类型:
--
作者:
Nishizumi Hirofumi;Miyashita Akihiro;Inoue Nobuko;Inokuchi Kasumi;Aoki Mari;Sakano Hitoshi

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在小鼠嗅球中,神经图谱主要是由嗅觉感觉神经元(OSN)的轴突-轴突相互作用建立的。然而,为了使地图发挥作用,OSN 必须与二阶神经元(二尖瓣细胞)建立适当的连接。二尖瓣细胞树突如何找到它们的伙伴肾小球以与 OSN 轴突形成突触?在这里,我们分析了肾小球形成受到干扰的各种突变小鼠的二尖瓣细胞的树突连接。我们目前的结果支持邻近模型,即二尖瓣细胞倾向于将初级树突连接到最近的相邻肾小球,无论它们的气味受体身份如何。肾小球的物理位置而不是气味受体特异性似乎在二尖瓣细胞与其伙伴 OSN 轴突的匹配中发挥着关键作用。
In the mouse olfactory bulb, neural map topography is largely established by axon–axon interactions of olfactory sensory neurons (OSNs). However, to make the map functional, the OSNs must make proper connections to second-order neurons, the mitral cells. How do the mitral-cell dendrites find their partner glomeruli for synapse formation with OSN axons? Here, we analyze dendrite connections of mitral cells in various mutant mice in which glomerular formation is perturbed. Our present results support the proximity model, whereby mitral cells tend to connect primary dendrites to the nearest neighboring glomeruli regardless of their odorant receptor identities. The physical location of glomeruli rather than the odorant-receptor specificity appears to play a key role in matching mitral cells with their partner OSN axons.
DOI: 10.1016/j.cell.2006.10.031
发表时间: 2006-12-01
期刊: CELL
影响因子: 64.5
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