DDX24突变改变了NPM1阶段的行为,并在血管形中破坏了细胞核平衡
Haopei Zhang1,2,3, Qiuyue Chen1,2,4, Qianqian Zhang1,2
1Guangdong Provincial Engineering Research Center of Molecular Imaging, The Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China 519000.
International journal of biological sciences
|September 14, 2023
概括
在DEAD-box酶DDX24中发生的突变会破坏细胞核功能和稳态,影响血管形的发病. 这项研究揭示了DDX24的存在.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 遗传学 是一个遗传学.
背景情况:
- 在DEAD-box酶DDX24中的点突变与诸如MOVLD和Budd-Chiari综合征等血管形有关.
- 与DDX24相关的血管形的发病原因尚不清楚.
- 核胺 (NPM1) 通过液-液相分离 (LLPS) 调节核细胞平衡,但其与血管疾病中DDX24的联系尚不清楚.
研究的目的:
- 研究DDX24在核细胞结构和功能中的作用.
- 为了阐明DDX24,NPM1和血管形病因之间的联系.
- 了解DDX24突变如何影响内皮细胞生物学.
主要方法:
- 在体外通过DDX24.24形成生物分子凝聚物.
- 在患者组织和培养内皮细胞 (ECs) 中对DDX24分离的分析.
- 调查DDX24-NPM1相互作用及其对NPM1阶段行为的影响.
- 评估DDX24在核糖体生物发生,细胞迁移和管形成中的作用.
主要成果:
- 突变的DDX24 (DDX24E271K) 显示了核细胞分裂的减少,改变了MOVLD患者组织和EC中的核细胞形态.
- DDX24直接与NPM1结合,调节其在核颗粒组件内的相位行为.
- DDX24对于EC核细胞稳定至关重要;它的突变或敲击会损害核糖体生物发生,并增强细胞迁移和管形成.
结论:
- DDX24突变通过改变NPM1阶段行为来破坏核细胞结构和功能.
- 由于DDX24突变导致的功能失调的核细胞平衡有助于血管形的发病.
- DDX24在血管发育和完整性相关的内皮细胞功能中发挥着关键作用.
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