血液流动通过依赖连接体的Alk1活动调节acvrl1转录
Anthony R Anzell1,2, Amy B Kunz1,3, James P Donovan1,4
1Department of Human Genetics, University of Pittsburgh School of Public Health, Pittsburgh, PA, USA.
Angiogenesis
|May 10, 2024
概括
血液流动和BMP10信号调节动脉细胞中ACVRL1的表达,为遗传性出血性长长生病 (HHT) 提供了潜在的治疗点. 这种积极的反机制提高了ACVRL1水平,这表明ALK1激活药物可以治疗HHT.
科学领域:
- 血管生物学 血管生物学
- 遗传学 遗传学 是一个
- 分子医学是分子医学.
背景情况:
- 遗传性出血性疏通症 (HHT) 是一种遗传性疾病,由于ACVRL1/ALK1或ENG的突变导致动脉静脉形 (AVM).
- 过度表达ACVRL1通过防止AVM发展,显示出HHT治疗的潜力.
研究的目的:
- 阐明调节ACVRL1表达的分子机制.
- 研究血液流动和BMP配体在ACVRL1调节中的作用.
主要方法:
- 利用斑马鱼胚胎研究表达模式和流量依赖.
- 雇佣了缺乏Bmp10的突变小鼠,并进行了BMP10/BMP9.9的静脉注射.
- 使用转基因的斑马鱼线来评估转录调节.
- 在剪切应力下检查人体内皮细胞以确认发现.
主要成果:
- 斑马鱼的ACVRL1表达取决于血液流动,并在重新启动后迅速恢复.
- 在Bmp10缺乏的小鼠中,ACVRL1的表达减少.
- BMP10/BMP9注射恢复ACVRL1表达以Alk1依赖的方式,即使没有流量.
- 流和Bmp10调节ACVRL1转录,这是人类内皮细胞中保存的机制.
结论:
- 血流下游的依赖体的Alk1活性通过正反循环增强了ACVRL1的表达.
- 激活ALK1的向疗法可以通过增加HHT治疗的信号传递和ACVRL1表达来提供双重益处.
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