期刊
CELL SYSTEMS
卷 3, 期 6, 页码 532-+出版社
CELL PRESS
DOI: 10.1016/j.cels.2016.11.014
关键词
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资金
- Simons Foundation
- Danish Council for Independent Research
- StemPhys DNRF Center of Excellence [DNRF116]
- ERC Starting Grant (SingleCellDynamics)
- NIH [R01 GM117134-01]
- Schweizerischer Nationalfonds
- SystemsX research grant
Oscillations and noise drive many processes in biology, but how both affect the activity of the transcription factor nuclear factor kappa B (NF-kappa B) is not understood. Here, we observe that when NF-B-K oscillations are entrained by periodic tumor necrosis factor (TNF) inputs in experiments, NF-kappa B exhibits jumps between frequency modes, a phenomenon we call cellular mode-hopping. By comparing stochastic simulations of NF-kappa B oscillations to deterministic simulations conducted inside and outside the chaotic regime of parameter space, we show that noise facilitates mode-hopping in all regimes. However, when the deterministic system is driven by chaotic dynamics, hops between modes are erratic and short-lived, whereas in experiments, the system spends several periods in one entrainment mode before hopping and rarely visits more than two modes. The experimental behavior matches our simulations of noise-induced modehopping outside the chaotic regime. We suggest that mode-hopping is a mechanism by which different NF-kappa B-dependent genes under frequency control can be expressed at different times.
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