内皮细胞中缺陷的Notch1信号驱动了Adams-Oliver综合征的小鼠模型中的病原体
Alyssa F Solano1,2,3, Kristina Preusse1, Brittany Cain1
1Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, USA.
The Journal of clinical investigation
|October 7, 2025
概括
亚当斯-奥利弗综合征 (AOS) 与破坏DNA结合的RBPJ变体有关. 内皮细胞中的这些主导负变异会导致致死性和心血管缺陷,揭示了Notch1信号传递.
科学领域:
- 遗传学 是一个遗传学.
- 发展生物学 发展生物学
- 分子医学是分子医学.
背景情况:
- 亚当斯-奥利弗综合征 (AOS) 是一种罕见的先天性疾病,影响头皮,四肢和心血管系统.
- NOTCH1,DLL4和RBPJ基因变异与AOS有关,但潜在的机制和组织起源仍然不清楚.
研究的目的:
- 阐明RBPJ变异在亚当斯-奥利弗综合征发病过程中的分子机制和组织特异性作用.
- 为了调查与AOS相关的RBPJ变异是否作为主导负蛋白.
主要方法:
- 定量结合测试以评估RBPJ变体与DNA和辅因子的相互作用.
- 产生和分析具有特定Rbpj和Notch1等位基因的小鼠模型.
- 条件遗传学将血管内皮在AOS类表型中的作用分离出来.
主要成果:
- 与AOS相关的RBPJ误解变体损害了DNA结合,作为主导负性蛋白质起作用.
- 具有AOS相关Rbpj等位基因的小鼠表现出主要的致死率和心血管缺陷,特别是在Notch1异基的背景下.
- 在内皮细胞中AOS RBPJ等位基的表达足以引起致死性和心血管缺陷.
结论:
- 血管系统中Notch1信号的减少是亚当斯-奥利弗综合征发病的关键驱动因素.
- 在AOS中,RBPJ变异主要通过隔离辅因子而起作用,导致血管缺陷.
- 内皮细胞功能障碍是AOS类表型发展的关键因素.
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