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.
复制标题
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
中科院分区:
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
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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