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Modeling the mammalian circadian clock with transcriptional feedback loops and cAMP signaling

机译:用转录反馈回路和营地信号建模哺乳动物昼夜时钟

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In this paper, we construct a new mathematical model by incorporating both transcriptional/translational feedback loops and cAMP-mediated feedback loop into the mammalian circadian oscillator. Except for reproducing typical experimental observations, the model shows that (i) for a weak TTFL, cAMP can sustain transcriptional rhythms of the mammalian circadian clock, (ii) for a strong TTFL, cAMP can only modulate the period and amplitude of transcriptional rhythms. The authors conclude that to understand the timekeeping mechanism of suprachiasmatic nucleus neurons, the transcriptional feedback loops should not be isolated from intracellular cAMP-dependent signaling.
机译:在本文中,我们通过将转录/翻译反馈回路和阵营介导的反馈回路结合到哺乳动物昼夜振荡器中来构建新的数学模型。除了再现典型的实验观察,模型显示(i)对于弱TTFL,CAMP可以维持哺乳动物昼夜钟的转录节奏,(ii)对于强大的TTFL,CAMP只能调节转录节奏的时期和幅度。作者的结论是要理解Suprachiasmatic细胞核神经元的计时机制,不应从细胞内的CAMP依赖信中分离转录反馈环。

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