PHB2通过NEDD4L依赖的NCOA4 ubiquitination改善铁和大动脉动脉瘤/解剖
Shengjun Xiong1, Jie Lin1, Ying An1
1Department of Cardiology, Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, China; State Key Laboratory of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, China; National Health Commission (NHC) Key Laboratory of Ischemic Heart Diseases, Shanghai, China; National Clinical Research Center for Interventional Medicine, Shanghai, China; Key Laboratory of Viral Heart Diseases, National Health Commission, Shanghai, China.
禁素2 (PHB2) 抑制细胞死亡途径铁亡,在血管光滑肌细胞中,防止大动脉动脉瘤和解剖 (AAD). 针对PHB2-NEDD4L-NCOA4轴为AAD提供了一个潜在的治疗策略.
科学领域:
- 血管生物学 血管生物学
- 细胞死亡机制 细胞死亡机制
- 分子医学是分子医学.
背景情况:
- 大动脉动脉瘤/解剖 (AAD) 是一种严重的血管疾病,分子原因不明.
- 铁,一种依赖于铁的细胞死亡形式,与血管退化有关,但其在AAD中的作用尚不清楚.
研究的目的:
- 为了研究禁止素2 (PHB2) 在AAD分子机制中的作用.
- 通过探索PHB2介导的细胞死亡途径调节来确定AAD的治疗点.
主要方法:
- 集成的转录基因数据集用于识别AAD中的关键基因.
- 在人类组织,小鼠模型和血管光滑肌细胞 (VSMCs) 中检查了PHB2表达.
- 利用VSMC特定的淘汰赛小鼠和病毒载体进行PHB2操纵,以评估AAD模型中的功能影响.
主要成果:
- 在AAD中,PHB2显著下调,特别是在VSMC中. 失去PHB2会加剧ADD表型,而PHB2过度表达会提供保护.
- PHB2 缺乏激活铁,其特点是脂质反应性氧物种 (ROS) 和铁过载的增加.
- PHB2通过NEDD4L介导的无化途径促进NCOA4降解来抑制铁灭菌,从而限制铁类菌.
结论:
- 确定了一种新的PHB2-NEDD4L-NCOA4调节轴,可以抑制VSMC中的铁.
- 这一途径对抗AAD进展起着保护作用.
- 针对这一轴,为AAD治疗提供了潜在的治疗途径.
相关概念视频
Necrosis
Morphological Manifestations of Necrosis
Necrotic cells show different types of morphological appearance depending on the type of tissue and infection. In coagulative necrosis, cells become...
Covalently Linked Protein Regulators
These groups modify specific amino acids in a protein....
Export of Misfolded Proteins out of the ER
Protein Modifications in the RER
Broadly, these modifications can be categorized into four main categories — glycosylation, formation of disulfide bonds, assembly of protein subunits, and specific proteolytic cleavages like removal of signal...
Regulation of Nuclear Protein Sorting
Nonsense-mediated mRNA Decay
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...

