Sleep and synaptic homeostasis: structural evidence in Drosophila.

Sleep and synaptic homeostasis: structural evidence in Drosophila.
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DOI:
10.1126/science.1202839
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发表时间:
2011-06-24
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
Cirelli C
Cirelli C
中科院分区:
其他
文献类型:
--
作者:
Bushey D;Tononi G;Cirelli C

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睡眠的功能仍然难以捉摸,但睡眠需求和神经元可塑性之间存在着强烈的联系。我们测试了这一假设,即清醒时的可塑性过程导致突触强度的净增加,而睡眠是突触重整所必需的。我们发现,在3果蝇神经元回路,突触的大小或数量增加后,几个小时的觉醒和减少,只有当苍蝇被允许睡觉。更丰富的清醒体验导致更大的突触生长和更大的睡眠需求。最后,我们证明了基因Fmr1(脆性X智力低下1)在睡眠依赖性突触重整中起着重要作用。
The functions of sleep remain elusive, but a strong link exists between sleep need and neuronal plasticity. We tested the hypothesis that plastic processes during wake lead to a net increase in synaptic strength, and sleep is necessary for synaptic renormalization. We found that, in 3 Drosophila neuronal circuits, synapse size or number increases after a few hours of wake and decreases only if flies are allowed to sleep. A richer wake experience resulted in both larger synaptic growth and greater sleep need. Finally, we demonstrate that the gene Fmr1 (fragile X mental retardation 1) plays an important role in sleep-dependent synaptic renormalization.
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