Circadian hepatocyte clocks keep synchrony in the absence of a master pacemaker in the suprachiasmatic nucleus or other extrahepatic clocks.

Circadian hepatocyte clocks keep synchrony in the absence of a master pacemaker in the suprachiasmatic nucleus or other extrahepatic clocks.
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在视交叉上核或其他肝外生物钟缺乏主起搏点的情况下,昼夜肝细胞生物钟保持同步。

DOI:
10.1101/gad.346460.120
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发表时间:
2021-03-01
影响因子:
10.5
通讯作者:
Schibler U
Schibler U
中科院分区:
生物学1区
文献类型:
--
作者:
Sinturel F;Gos P;Petrenko V;Hagedorn C;Kreppel F;Storch KF;Knutti D;Liani A;Weitz C;Emmenegger Y;Franken P;Bonacina L;Dibner C;Schibler U

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在这项研究中,Sinturel等人试图证明视交叉上核(SCN)同步外周昼夜节律振荡器。通过在自由运动的小鼠中使用长期的生物发光记录,他们表明,SCN确实是维持器官之间同步所必需的,并且在缺乏SCN的小鼠肝脏或除肝细胞以外的细胞中振荡的昼夜节律振荡持续存在。人们一直认为视交叉上核(SCN)同步外周昼夜节律振荡器。然而,这一点从未得到令人信服的证明,因为生物化学时间序列实验在行为不规律的动物中是不可行的。通过在自由运动的小鼠中使用长期的生物发光记录,我们表明SCN确实是维持器官之间同步所必需的。然而,令人惊讶的是,昼夜节律振荡在缺乏SCN的小鼠肝脏或除肝细胞外的其他细胞中的振荡子中持续存在。因此,与SCN神经元类似,肝细胞可以在没有其他器官或环境周期产生的Zeitgeber信号的情况下保持相一致性。
In this study, Sinturel et al. sought to show that the suprachiasmatic nucleus (SCN) synchronizes peripheral circadian oscillators. By using long-term bioluminescence recordings in freely moving mice, they show that the SCN is indeed required for maintaining synchrony between organs and that circadian oscillations persist in the livers of mice devoid of an SCN or oscillators in cells other than hepatocytes. It has been assumed that the suprachiasmatic nucleus (SCN) synchronizes peripheral circadian oscillators. However, this has never been convincingly shown, since biochemical time series experiments are not feasible in behaviorally arrhythmic animals. By using long-term bioluminescence recording in freely moving mice, we show that the SCN is indeed required for maintaining synchrony between organs. Surprisingly, however, circadian oscillations persist in the livers of mice devoid of an SCN or oscillators in cells other than hepatocytes. Hence, similar to SCN neurons, hepatocytes can maintain phase coherence in the absence of Zeitgeber signals produced by other organs or environmental cycles.
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