Linking neural activity and molecular oscillations in the SCN.
Linking neural activity and molecular oscillations in the SCN.
复制标题
连接SCN中的神经活动和分子振荡。
DOI:
10.1038/nrn3086
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发表时间:
2011-09-02
影响因子:
34.7
通讯作者:
Colwell, Christopher S.
中科院分区:
文献类型:
--
作者:
Colwell, Christopher S.
Neurons in the suprachiasmatic nucleus (SCN) function as part of a central timing circuit that drives daily changes in our behaviour and underlying physiology. A hallmark feature of SCN neuronal populations is that they are mostly electrically silent during the night, start to fire action potentials near dawn and then continue to generate action potentials with a slow and steady pace all day long. Sets of currents are responsible for this daily rhythm, with the strongest evidence for persistent Na+ currents, L-type Ca2+ currents, hyperpolarization-activated currents (IH), large-conductance Ca2+ activated K+ (BK) currents and fast delayed rectifier (FDR) K+ currents. These rhythms in electrical activity are crucial for the function of the circadian timing system, including the expression of clock genes, and decline with ageing and disease. This article reviews our current understanding of the ionic and molecular mechanisms that drive the rhythmic firing patterns in the SCN.
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