中国物理B ›› 2011, Vol. 20 ›› Issue (12): 128703-128703.doi: 10.1088/1674-1056/20/12/128703

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Noise transmission and delay-induced stochastic oscillations in biochemical network motifs

刘圣君1, 王祺1, 刘波1, 晏世伟2, Fumihiko Sakata3   

  1. (1)College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China; (2)College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China;Beijing Radiation Centre, Beijing 100875, China; (3)Institute of Applied Beam Science, Graduate School of Science and Technology, Ibaraki University, Mito 310-8512, Japan
  • 收稿日期:2011-02-26 修回日期:2011-06-12 出版日期:2011-12-15 发布日期:2011-12-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10975019), the Foundation of the Ministry of Personnel of China for Returned Scholars (Grant No. MOP2006138), and the Fundamental Research Funds for the Central Universities.

Noise transmission and delay-induced stochastic oscillations in biochemical network motifs

Liu Sheng-Jun(刘圣君)a), Wang Qi(王祺)a), Liu Bo(刘波)a), Yan Shi-Wei(晏世伟)a)b)†, and Fumihiko Sakatac)   

  1. a College of Nuclear Science and Technology, Beijing Normal University, Beijing 100875, China; b Beijing Radiation Centre, Beijing 100875, China; c Institute of Applied Beam Science, Graduate School of Science and Technology, Ibaraki University, Mito 310-8512, Japan
  • Received:2011-02-26 Revised:2011-06-12 Online:2011-12-15 Published:2011-12-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10975019), the Foundation of the Ministry of Personnel of China for Returned Scholars (Grant No. MOP2006138), and the Fundamental Research Funds for the Central Universities.

摘要: With the aid of stochastic delayed-feedback differential equations, we derive an analytic expression for the power spectra of reacting molecules included in a generic biological network motif that is incorporated with a feedback mechanism and time delays in gene regulation. We systematically analyse the effects of time delays, the feedback mechanism, and biological stochasticity on the power spectra. It has been clarified that the time delays together with the feedback mechanism can induce stochastic oscillations at the molecular level and invalidate the noise addition rule for a modular description of the noise propagator. Delay-induced stochastic resonance can be expected, which is related to the stability loss of the reaction systems and Hopf bifurcation occurring for solutions of the corresponding deterministic reaction equations. Through the analysis of the power spectrum, a new approach is proposed to estimate the oscillation period.

关键词: biological stochasticity, time delay, oscillation and resonance, network motif

Abstract: With the aid of stochastic delayed-feedback differential equations, we derive an analytic expression for the power spectra of reacting molecules included in a generic biological network motif that is incorporated with a feedback mechanism and time delays in gene regulation. We systematically analyse the effects of time delays, the feedback mechanism, and biological stochasticity on the power spectra. It has been clarified that the time delays together with the feedback mechanism can induce stochastic oscillations at the molecular level and invalidate the noise addition rule for a modular description of the noise propagator. Delay-induced stochastic resonance can be expected, which is related to the stability loss of the reaction systems and Hopf bifurcation occurring for solutions of the corresponding deterministic reaction equations. Through the analysis of the power spectrum, a new approach is proposed to estimate the oscillation period.

Key words: biological stochasticity, time delay, oscillation and resonance, network motif

中图分类号:  (Noise in biological systems)

  • 87.18.Tt
05.40.-a (Fluctuation phenomena, random processes, noise, and Brownian motion) 87.16.dj (Dynamics and fluctuations)