期刊
NATURE CELL BIOLOGY
卷 10, 期 12, 页码 1463-U197出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/ncb1806
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资金
- Japanese Ministry of Education, Culture, Sports, Science and Technology
- MEXT, Japan
- Grants-in-Aid for Scientific Research [19107002] Funding Source: KAKEN
The circadian clock is reset by external time cues for synchronization to environmental changes(1). In mammals, the light-input signalling pathway mediated by Per gene induction has been extensively studied(2,3). On the other hand, little is known about resetting mechanisms that are independent of Per induction(4-6). Here we show that activation of activin receptor-like kinase (ALK), triggered by TGF-beta, activin or alkali signals, evoked resetting of the cellular clock independently of Per induction. The resetting was mediated by an immediate-early induction of Dec1, a gene whose physiological role in the function of the circadian clock has been unclear. Acute Dec1 induction was a prerequisite for ALK-mediated resetting and upregulation was dependent on SMAD3, which was phosphorylated for activation in response to the resetting stimuli. Intraperitoneal injection of TGF-beta into wild-type or Dec1-deficient mice demonstrated that Dec1 has an essential role in phase-shift of clock gene expression in the kidney and adrenal gland. These results indicate that ALK-SMAD3-Dec1 signalling provides an input pathway in the mammalian molecular clock.
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