转录和血管病理生理细胞状态之间的不一致
Macarena Fernández-Chacón1,2, Severin Mühleder1, Alvaro Regano1
1Molecular Genetics of Angiogenesis Group, Centro Nacional de Investigaciones Cardiovasculares (CNIC), Madrid, Spain.
Nature cardiovascular research
|September 25, 2023
概括
缺口受体会导致细胞循环停止,而类似delta的4 (dll4) 配体损失则会导致细胞增殖和尖端细胞状态. 这揭示了肝血管稳定中的不同作用,并突出了血管异常作为抗Dll4抗体毒性的原因.
科学领域:
- 内皮细胞生物学 内皮细胞生物学
- 分子信号传递是分子信号传递.
- 血管恒温是血管的恒温.
背景情况:
- 诺奇通路对于内皮细胞的转录特异性至关重要.
- 准Notch受体或Delta类联结体4 (Dll4) 破坏血管生成.
- 了解连接体-受体动态是血管健康的关键.
研究的目的:
- 调查Notch配体和受体在肝血管平衡中的不同作用.
- 阐明Dll4-介导的内皮细胞增殖和尖端细胞状态背后的分子机制.
- 在抗Dll4抗体毒性方面区分血管表型与新生瘤.
主要方法:
- 对所有Notch信号成员的单个和复合基因突变的分析.
- 基因表达分析以识别转录开关 (例如,Myc).
- 药理上抑制了亲血管性通路 (MAPK/ERK,mTOR,VEGFA) 的作用.
主要成果:
- 缺陷受体损失诱导了内皮细胞高甲基细胞循环停止和衰老.
- Dll4损失触发了Myc驱动的开关,促进了内皮细胞的增殖和尖端细胞状态.
- Myc损失部分挽救了Dll4损失诱导的血管生成,但没有血管扩大;抗VEGFA治疗阻止了血管扩张,但不是所有的转录程序.
结论:
- 连接体和受体差异调节肝血管平衡,对内皮细胞命运有明显的影响.
- 血管结构异常,而不是瘤,可能导致抗Dll4抗体毒性.
- 在单细胞转录状态,血管表型和病理生理学之间存在不一致.
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