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计算模型确定了DNA损伤和氧化应激反应之间的交叉通话的主要媒介
Elsje J Burgers1, Raju P Sharma1, Carl Joshua S Eugenio1
1Division of Cell Systems and Drug Safety, Leiden Academic Centre for Drug Research, Leiden University, Leiden, The Netherlands.
PLoS computational biology
|March 10, 2025
概括
开发了计算模型,以了解氧化应激反应 (OSR) 和DNA损伤反应 (DDR) 途径在肝细胞中如何相互作用. 模型揭示了关键的交叉点,特别是p21对OSR路径的重大影响.
科学领域:
- 细胞生物学 细胞生物学
- 计算毒理学计算毒理学
- 系统生物学 系统生物学
背景情况:
- 细胞在暴露于有毒物质时激活多种应激通路,包括氧化应激反应 (OSR) 和DNA损伤反应 (DDR).
- 已知OSR和DDR通路之间的交叉声会影响细胞命运和不良反应.
- 了解这种交叉通话对于预测细胞对药物和有毒物质的反应至关重要.
研究的目的:
- 在体外开发描述肝细胞 (HepG2) 中OSR和DDR蛋白的动态的计算模型.
- 为了确定驱动OSR和DDR路径之间交叉的关键相互作用.
- 评估这些相互作用在蛋白质动态和潜在逆境预测中的重要性.
主要方法:
- 为OSR路径开发了一个新的计算模型,并将其与现有的DDR路径模型相结合.
- 扩展了组合模型,以纳入文献中描述的交叉通话机制.
- 将模型应用于暴露于二甲基酸盐或乙氧化的HepG2细胞中OSR (NRF2,SRXN1) 和DDR (p53,p21,BTG2,MDM2) 蛋白质的时间动态数据.
- 执行了关键模型组件的形敲击.
主要成果:
- 开发的计算模型准确地描述了HepG2细胞中关键的OSR和DDR蛋白动态.
- 在 silico 敲击中,通常对连接的路径表现出适度的影响.
- 抑制p21显著降低了NRF2和SRXN1的水平,这表明对OSR途径产生了重大影响.
结论:
- 计算模型成功地捕捉了OSR和DDR路径之间的相互作用.
- 蛋白质p21在DDR和OSR之间的交叉声调解中发挥着关键作用.
- 这些模型通过与细胞命运预测模型集成来预测细胞逆境的潜在应用.
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