Cdk1依赖的层聚合是氧化应激诱导的核形状异常的基础
Ju-Hyun Ahn1, Min-Guk Cho2, Abdul Basit3
1Department of Biochemistry and Molecular Biology, Ajou University School of Medicine, Suwon 16499; Department of Biomedical Sciences, The Graduate School of Ajou University, Suwon 16499, Korea; Department of Microbiology and Immunology, University of North Carolina at Chapel Hill, North Carolina 27599, USA.
BMB reports
|September 8, 2025
概括
反应性氧物种 (ROS) 通过降低Cdk1活性来破坏线粒细胞中的核形态,导致层层聚合并影响核外重组. 这揭示了在细胞分裂过程中ROS诱导的核损伤的新机制.
科学领域:
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
- 分子生物学分子生物学
背景情况:
- 改变的核形态是癌症的标志,影响瘤预后.
- 众所周知,反应性氧物种 (ROS) 诱导核变化,但机制尚不清楚,特别是在核组装过程中.
- 具有动态核外的线粒细胞可能特别容易受到ROS诱导的核变形.
研究的目的:
- 研究ROS在线粒分裂过程中影响核形态的机制.
- 探索过氧化 (H2O2) 在线粒细胞核组装和变形中的作用.
- 阐明ROS,Cdk1活动和层状动态之间的关系.
主要方法:
- 分子细胞暴露于过氧化 (H2O2).
- 层层聚合和核形态的分析.
- 试管体内激酶试验以评估Cdk1活性和层层酸化.
- 调查Cdk1活动恢复对层层聚合物的影响.
主要成果:
- 甲基细胞中的H2O2暴露导致了持续的层状聚合物和异常的核形态.
- H2O2抑制了Cdk1的活动,减少了层层酸化,导致聚合.
- 恢复Cdk1活动挽救了层酸化和缓解聚合.
- 线粒体进入期间的层层聚合与过早重组相关,破坏了核膜的形成.
结论:
- 在早期的线粒分裂期间,ROS介导的Cdk1活动的扰动会触发层层聚合.
- 这种聚合破坏了层层重组和核外的形成,导致核形态的改变.
- 这项研究揭示了ROS诱导的通过Cdk1调节在转化过程中破坏核架构的新机制.
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