在基因调节网络中用于故障分析的准静止分布边界
Fabricio Cravo1,2,3, Matthias Függer1, Thomas Nowak1,4
1Université Paris-Saclay, CNRS, ENS Paris-Saclay, LMF, Gif-sur-Yvette, France.
bioRxiv : the preprint server for biology
|November 24, 2025
概括
由于分子噪音,设计稳定的合成基因调节网络 (GRNs) 是具有挑战性的. 本研究介绍了一种使用马尔科夫链的数学框架来预测和控制GRN稳定性,提高生物传感器和逻辑门的可靠性.
科学领域:
- 合成生物学 合成生物学
- 系统生物学 系统生物学
- 生物物理学的生物物理.
背景情况:
- 基因调节网络 (GRNs) 中的随机波动会造成不可预测性,阻碍了强大的合成系统的设计.
- 对于生物传感器和逻辑门至关重要的多稳定GRN,由于固有的噪音,容易发生意外的状态转换.
- 在这些复杂的生物系统中,关于稳定状态的概率分布的特征存在有限的工具.
研究的目的:
- 开发一个数学框架来分析多稳定的GRNs.
- 为提高合成切换开关的稳定性提供定量设计原则.
- 通过计算错误率来评估基于GRN的生物传感器的可靠性.
主要方法:
- 利用连续时间马尔科夫链 (CTMCs) 来建模多稳定的GRN的动态.
- 采用准静止分布来分析接近稳定状态的系统的行为.
- 将框架应用于现有的文献示例,并模拟生物传感器群体动态.
主要成果:
- 开发了一个广泛适用的数学框架,用于分析具有连接状态空间的多稳定系统.
- 确定了关键参数值,决定了从频繁的随机转换到长期稳定性的过渡 (小时与年/十年).
- 在人口层面的生物传感器动态中,假阳性/假阴性率的计算上限.
结论:
- 拟议的框架提供了强大的切换开关结构的定量设计原则.
- 该方法与实验观测一致,并为合成GRN稳定性提供预测能力.
- 这项工作提高了基于GRN的合成生物学应用程序的可靠性,包括生物传感器和逻辑门.
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