Pulsatile stimulation determines timing and specificity of NF-kappaB-dependent transcription.

Pulsatile stimulation determines timing and specificity of NF-kappaB-dependent transcription.
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脉冲刺激决定了NF-kappab依赖性转录的时间和特异性。

DOI:
10.1126/science.1164860
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发表时间:
2009-04-10
期刊:
Science (New York, N.Y.)
影响因子:
--
通讯作者:
White MR
White MR
中科院分区:
其他
文献类型:
--
作者:
Ashall L;Horton CA;Nelson DE;Paszek P;Harper CV;Sillitoe K;Ryan S;Spiller DG;Unitt JF;Broomhead DS;Kell DB;Rand DA;Sée V;White MR

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核因子κ B(NF-κB)转录因子调节细胞应激反应和对感染的免疫反应。NF-κB活化导致核NF-κB丰度的振荡。为了确定这些振荡的功能,我们用不同间隔的肿瘤坏死因子α(TNFα)重复短脉冲处理细胞,以模拟脉动的炎症信号。在分析的所有脉冲间隔,我们观察到NF-κB核移位的同步周期。较低频率的刺激给重复的全振幅易位,而较高频率的脉冲,减少易位,表明未能重置。确定性和随机数学模型预测负反馈回路如何调节系统的重置和细胞异质性。改变刺激时间间隔可产生不同的NF-κ B依赖性基因表达模式,支持振荡频率的功能作用。
The Nuclear Factor kappa B (NF-κB) transcription factor regulates cellular stress responses and the immune response to infection. NF-κB activation results in oscillations in nuclear NF-κB abundance. To define the function of these oscillations, we treated cells with repeated short pulses of tumor necrosis factor alpha (TNFα) at various intervals to mimic pulsatile inflammatory signals. At all pulse intervals analyzed, we observed synchronous cycles of NF-κB nuclear translocation. Lower frequency stimulations gave repeated full-amplitude translocations, whereas higher frequency pulses, gave reduced translocation, indicating a failure to reset. Deterministic and stochastic mathematical models predicted how negative feedback loops regulate both the resetting of the system and cellular heterogeneity. Altering the stimulation intervals gave different patterns of NF-κB-dependent gene expression, supporting a functional role for oscillation frequency.
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