A critical period defined by axon-targeting mechanisms in the murine olfactory bulb.

A critical period defined by axon-targeting mechanisms in the murine olfactory bulb.
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DOI:
10.1126/science.1248806
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发表时间:
2014-04-11
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Barnea G
Barnea G
中科院分区:
其他
文献类型:
--
作者:
Tsai L;Barnea G

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由于鼻子中感觉神经元和嗅球中抑制性中间神经元的持续神经发生,嗅觉系统在整个生命过程中保持可塑性。在这里,我们揭示了一个气味受体的转基因表达有非细胞自主的轴突表达这种受体的内源性基因的影响。围产期表达的转基因气味受体的原因重新路由类似的轴突到新的肾小球,而表达后的感觉地图建立不会导致重新路由。此外,化学消融的地图后改道不恢复正常的地图,即使当转基因受体不再表达。我们的研究结果表明,肾小球被指定为目标的感觉神经元表达特定的气味受体在一个关键时期形成的嗅觉感觉地图。
The olfactory system remains plastic throughout life due to continuous neurogenesis of sensory neurons in the nose and inhibitory interneurons in the olfactory bulb. Here, we reveal that transgenic expression of an odorant receptor has non-cell autonomous effects on axons expressing this receptor from the endogenous gene. Perinatal expression of transgenic odorant receptor causes rerouting of like-axons to new glomeruli, while expression after the sensory map is established does not lead to rerouting. Further, chemical ablation of the map after rerouting does not restore the normal map, even when the transgenic receptor is no longer expressed. Our results reveal that glomeruli are designated as targets for sensory neurons expressing specific odorant receptors during a critical period in the formation of the olfactory sensory map.
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发表时间: 2010-07-07
期刊: The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子: --
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