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Double-negative feedback loops as a common design motif in the transcriptional networks regulating cell fate

机译:双负反馈环是调控细胞命运的转录网络中常见的设计基序

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摘要

The gene networks that regulate the choice of cell fate in living organisms contain a set of ubiquitous design motifs. We discuss the role of one such motif, the double-negative feedback loop, in producing discrete and stable steady states during the development of mammalian cell lineages. Several examples of this motif are described from the literature. Thereafter, we use an ordinary differential equation-based computational model of the double-negative feedback loop motif to illustrate the mechanism by which it generates stable cellular states. Stochastic simulations show how this motif ensures robustness of cell states to stochastic fluctuations in gene expression.
机译:调节活生物体中细胞命运选择的基因网络包含一组普遍存在的设计基序。我们讨论了一种这样的基序,双负反馈回路,在哺乳动物细胞谱系发育过程中产生离散和稳定稳态中的作用。从文献中描述了该基序的几个例子。此后,我们使用双负反馈回路基元的基于普通微分方程的计算模型来说明其生成稳定细胞状态的机制。随机模拟显示了该基序如何确保细胞状态对基因表达中随机波动的稳健性。

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