Neural map formation in the mouse olfactory system.

Neural map formation in the mouse olfactory system.
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DOI:
10.1007/s00018-014-1597-0
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发表时间:
2014-08
影响因子:
8
通讯作者:
Sakano, Hitoshi
Sakano, Hitoshi
中科院分区:
生物学1区
文献类型:
--
作者:
Takeuchi, Haruki;Sakano, Hitoshi

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在小鼠的嗅觉系统中,由嗅觉神经元(OSNs)产生的约1000种不同的气味受体(ORs)可以检测到气味。每个OSN只表达一种功能的OR物种,这被称为“一个神经元-一个受体”规则。此外,具有相同OR的OSN轴突汇聚到嗅球(OB)内的特定投射位置,形成肾小球结构,即“一个肾小球-一个受体”规则。基于这些基本规则,OSN检测到的气味结合信号被转换为OB中激活的肾小球的地形信息。在发育过程中,肾小球图谱是由两个遗传程序过程的组合形成的:一个是沿背腹轴的OR无关投影,另一个是沿前后轴的OR依赖投影。在新生儿期,MAP以依赖活动的方式进一步细化。本文就小鼠嗅觉系统神经映射形成的最新研究进展作一综述。
In the mouse olfactory system, odorants are detected by ~1,000 different odorant receptors (ORs) produced by olfactory sensory neurons (OSNs). Each OSN expresses only one functional OR species, which is referred to as the “one neuron–one receptor” rule. Furthermore, OSN axons bearing the same OR converge to a specific projection site in the olfactory bulb (OB) forming a glomerular structure, i.e., the “one glomerulus–one receptor” rule. Based on these basic rules, binding signals of odorants detected by OSNs are converted to topographic information of activated glomeruli in the OB. During development, the glomerular map is formed by the combination of two genetically programmed processes: one is OR-independent projection along the dorsal–ventral axis, and the other is OR-dependent projection along the anterior-posterior axis. The map is further refined in an activity-dependent manner during the neonatal period. Here, we summarize recent progress of neural map formation in the mouse olfactory system.
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