在临时刺激之后,网络拓中的持久记忆
Federico Sevlever1,2,3, Ariel Waisman2, Santiago Miriuka2
1Universidad de Buenos Aires, de Ciencias Exactas y Naturales, Departamento de Física, Ciudad Universitaria, Buenos Aires 1428, Argentina.
iScience
|November 17, 2025
概括
细胞通过基因网络中的分子记忆来记住过去的信号. 积极的反循环创造了持久的记忆,而负面的反可以删除它,影响细胞命运的决定.
科学领域:
- 系统生物学 系统生物学
- 分子生物学分子生物学
- 计算生物学是一种计算生物学.
背景情况:
- 细胞对短暂刺激的反应是由分子记忆形成的.
- 了解细胞如何存储和处理信息对于细胞命运的决定至关重要.
研究的目的:
- 开发一种用于量化细胞记忆的数学框架.
- 识别赋予记忆的网络动机,并分析基因调节电路中的记忆动态.
主要方法:
- 开发了一个数学框架来量化记忆.
- 利用信号和基因调控网络的计算模型.
- 应用框架来分析来自小鼠胚胎干细胞的基因表达数据.
主要成果:
- 积极的反循环,特别是具有双稳定的循环,可以维持长期的分子记忆.
- 某些负反循环可以删除内存,而振荡电路则以相位方式存储信息.
- 在小鼠胚胎干细胞中,不同的基因在不同的分化线索下表现出不同程度的记忆保留.
结论:
- 蜂电路架构决定了信息存储和记忆保留的能力.
- 开发的框架提供了一种统一的方法来比较各种生物系统中的记忆.
- 分子记忆在细胞分化和对环境线索的反应中起着至关重要的作用.
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