A Series of Suppressive Signals within the Drosophila Circadian Neural Circuit Generates Sequential Daily Outputs.
A Series of Suppressive Signals within the Drosophila Circadian Neural Circuit Generates Sequential Daily Outputs.
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DOI:
10.1016/j.neuron.2017.05.007
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发表时间:
2017-06-21
期刊:
影响因子:
16.2
通讯作者:
Taghert PH
中科院分区:
文献类型:
--
作者:
Liang X;Holy TE;Taghert PH
We studied the Drosophila circadian neural circuit using whole brain imaging in vivo. Five major groups of pacemaker neurons display synchronized molecular clocks, yet each exhibits a distinct phase of daily Ca2+ activation. Light and neuropeptide PDF from morning cells (s-LNv) together delay the phase of the evening (LNd) group by ~12 h; PDF alone delays the phase of the DN3 group, by ~17 h. Neuropeptide sNPF, released from s-LNv and LNd pacemakers, produces latenight Ca2+ activation in the DN1 group. The circuit also features negative feedback by PDF to truncate the s-LNv Ca2+ wave and terminate PDF release. Both PDF and sNPF suppress basal Ca2+ levels in target pacemakers with long durations by cell autonomous actions. Thus, light and neuropeptides act dynamically at distinct hubs of the circuit to produce multiple suppressive events that create the proper tempo and sequence of circadian pacemaker neuronal activities.
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影响因子:
64.8
作者:
Grima, B;Chèlot, E;Rouyer, F
通讯作者:
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影响因子:
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DOI:
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发表时间:
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期刊:
The Journal of comparative neurology
影响因子:
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影响因子:
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