分离性大动脉动脉瘤形成是由化学遗传氧化应激引起的
Apabrita Ayan Das1,2, Markus Waldeck-Weiermair1,2,3, Shambhu Yadav1,2
1Cardiovascular Medicine Division, Brigham and Women's Hospital, Boston, Massachusetts, USA.
The Journal of clinical investigation
|March 18, 2025
概括
大动脉动脉瘤与氧化压力有关. 一个新的小鼠模型显示,d-alanine通过激活DUSP3,一个潜在的药物点,诱导腹腔大动脉动脉瘤.
科学领域:
- 心血管生物学 心血管生物学
- 分子医学是分子医学.
- 病理学 病理学 病理学
背景情况:
- 大动脉动脉瘤是危及生命的血管疾病,随着年龄的增长而增加.
- 氧化应激是大动脉动脉瘤发展的关键因素.
- 现有的模型缺乏专门诱导动脉瘤进行研究的能力.
研究的目的:
- 为研究大动脉动脉瘤形成创建一种新的化学遗传小鼠模型.
- 研究氧化应激和特定信号通路在动脉瘤发育中的作用.
- 为了确定大动脉动脉瘤的潜在治疗点.
主要方法:
- 开发了一种转基因小鼠系 (DAAO-TGTie2),在内皮细胞中表达酵母d-氨基酸氧化酶 (DAAO).
- 诱导氧化应激和动脉瘤形成通过食小鼠d-alanine.
- 利用蛋白质组学和分子分析来识别关键信号分子 (JNK1,DUSP3,KLF4).
主要成果:
- 在内皮细胞中,过氧化 (H2O2) 的化学遗传诱导导致高血压和腹腔大动脉动脉瘤.
- 氧化应激激活DUSP3 (双特异性酸酶3) 在腹腔大动脉中,去化JNK1.
- 抑制DUSP3完全阻止了动脉瘤的形成,突出了它的关键作用.
- 激活了KLF4依赖的通路,触发了动脉瘤的发展.
结论:
- 信号通路的区域差异影响大动脉动脉瘤的进展.
- DUSP3在调解氧化应激诱导动脉瘤形成方面发挥着至关重要的作用.
- DUSP3是治疗大动脉动脉瘤的一个有前途的药理学标.
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