Entrainment of Circadian Rhythms Depends on Firing Rates and Neuropeptide Release of VIP SCN Neurons.
Entrainment of Circadian Rhythms Depends on Firing Rates and Neuropeptide Release of VIP SCN Neurons.
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DOI:
10.1016/j.neuron.2018.06.029
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发表时间:
2018-08-08
期刊:
影响因子:
16.2
通讯作者:
Herzog ED
中科院分区:
文献类型:
--
作者:
Mazuski C;Abel JH;Chen SP;Hermanstyne TO;Jones JR;Simon T;Doyle FJ 3rd;Herzog ED
The mammalian suprachiasmatic nucleus (SCN) functions as a master circadian pacemaker, integrating environmental input to align physiological and behavioral rhythms to local time cues. Approximately 10% of SCN neurons express vasoactive intestinal polypeptide (VIP); however, it is unknown how firing activity of VIP neurons releases VIP to entrain circadian rhythms. To identify physiologically relevant firing patterns, we optically tagged VIP neurons and characterized spontaneous firing over three days. VIP neurons had circadian rhythms in firing rate and exhibited two classes of instantaneous firing activity. We next tested whether physiologically relevant firing affected circadian rhythms through VIP release. We found that VIP neuron stimulation with high, but not low, frequencies shifted gene expression rhythms in vitro through VIP signaling. In vivo, high frequency VIP neuron activation rapidly entrained circadian locomotor rhythms. Thus, increases in VIP neuronal firing frequency release VIP and entrain molecular and behavioral circadian rhythms.
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影响因子:
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16.2
作者:
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Herzog ED
DOI:
10.1111/j.1748-1716.1989.tb08721.x
发表时间:
1989-09-01
期刊:
ACTA PHYSIOLOGICA SCANDINAVICA
影响因子:
--
作者:
IVERFELDT, K;SERFOZO, P;BARTFAI, T
通讯作者:
BARTFAI, T