Exploring signal-driven gene diversity: a novel cascade approach

IF 4.6 2区 物理与天体物理 Q1 PHYSICS, MULTIDISCIPLINARY
Zhenzhen Guo , Haowen Chen , Wenjie Cao , Huahai Qiu , Tianshou Zhou
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引用次数: 0

Abstract

Cells must have the ability to respond to various external signals, but our understanding of this signal response is very limited. Here we analyze a simple cascade model of stochastic gene expression, which assumes that the upstream (input) gene is expressed in a constitutive manner whereas the downstream (output) gene is expressed in a bursty fashion via a two-state model, and that the former regulates the latter via transcription factors (products of the former). By large scale sampling in the space of model parameters, we find that the output distributions can exhibit diverse patterns such as unimodal, bimodal or trimodal modes, depending on the regulation way (positive or negative). These patterns, which are different from those in the case of no regulation, are independent of the choice of parameter values and hence qualitatively invariant. Diverse expression patterns resulting from signal response would be important for cell fate decisions and utilized by cells for a better survival in complex environments.

Abstract Image

探索信号驱动的基因多样性:一种新的级联方法
细胞必须具有对各种外部信号作出反应的能力,但我们对这种信号反应的理解非常有限。在这里,我们分析了一个简单的随机基因表达级联模型,该模型假设上游(输入)基因以组成方式表达,而下游(输出)基因通过双态模型以突发方式表达,并且前者通过转录因子(前者的产物)调节后者。通过对模型参数空间的大尺度采样,我们发现,根据调节方式(正或负)的不同,输出分布可以呈现单峰、双峰或三峰等多种模式。这些模式不同于无规则情况下的模式,它们独立于参数值的选择,因此在质量上是不变的。信号反应导致的多种表达模式对细胞命运的决定和细胞在复杂环境中更好的生存是重要的。
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来源期刊
Chinese Journal of Physics
Chinese Journal of Physics 物理-物理:综合
CiteScore
8.50
自引率
10.00%
发文量
361
审稿时长
44 days
期刊介绍: The Chinese Journal of Physics publishes important advances in various branches in physics, including statistical and biophysical physics, condensed matter physics, atomic/molecular physics, optics, particle physics and nuclear physics. The editors welcome manuscripts on: -General Physics: Statistical and Quantum Mechanics, etc.- Gravitation and Astrophysics- Elementary Particles and Fields- Nuclear Physics- Atomic, Molecular, and Optical Physics- Quantum Information and Quantum Computation- Fluid Dynamics, Nonlinear Dynamics, Chaos, and Complex Networks- Plasma and Beam Physics- Condensed Matter: Structure, etc.- Condensed Matter: Electronic Properties, etc.- Polymer, Soft Matter, Biological, and Interdisciplinary Physics. CJP publishes regular research papers, feature articles and review papers.
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